/* $Id: ClpSimplex.cpp 1511 2010-02-08 16:25:08Z forrest $ */
// Copyright (C) 2002, International Business Machines
// Corporation and others.  All Rights Reserved.

//#undef NDEBUG

#include "ClpConfig.h"

#include "CoinPragma.hpp"
#include <math.h>

#if SLIM_CLP==2
#define SLIM_NOIO
#endif
#include "CoinHelperFunctions.hpp"
#include "ClpSimplex.hpp"
#include "ClpFactorization.hpp"
#include "ClpPackedMatrix.hpp"
#include "CoinIndexedVector.hpp"
#include "ClpDualRowDantzig.hpp"
#include "ClpDualRowSteepest.hpp"
#include "ClpPrimalColumnDantzig.hpp"
#include "ClpPrimalColumnSteepest.hpp"
#include "ClpNonLinearCost.hpp"
#include "ClpMessage.hpp"
#include "ClpEventHandler.hpp"
#include "ClpLinearObjective.hpp"
#include "ClpHelperFunctions.hpp"
#include "CoinModel.hpp"
#include "CoinLpIO.hpp"
#include <cfloat>

#include <string>
#include <stdio.h>
#include <iostream>
//#############################################################################

ClpSimplex::ClpSimplex (bool emptyMessages) :

  ClpModel(emptyMessages),
  bestPossibleImprovement_(0.0),
  zeroTolerance_(1.0e-13),
  columnPrimalSequence_(-2),
  rowPrimalSequence_(-2), 
  bestObjectiveValue_(-COIN_DBL_MAX),
  moreSpecialOptions_(2),
  baseIteration_(0),
  primalToleranceToGetOptimal_(-1.0),
  largeValue_(1.0e15),
  largestPrimalError_(0.0),
  largestDualError_(0.0),
  alphaAccuracy_(-1.0),
  dualBound_(1.0e10),
  alpha_(0.0),
  theta_(0.0),
  lowerIn_(0.0),
  valueIn_(0.0),
  upperIn_(-COIN_DBL_MAX),
  dualIn_(0.0),
  lowerOut_(-1),
  valueOut_(-1),
  upperOut_(-1),
  dualOut_(-1),
  dualTolerance_(1.0e-7),
  primalTolerance_(1.0e-7),
  sumDualInfeasibilities_(0.0),
  sumPrimalInfeasibilities_(0.0),
  infeasibilityCost_(1.0e10),
  sumOfRelaxedDualInfeasibilities_(0.0),
  sumOfRelaxedPrimalInfeasibilities_(0.0),
  acceptablePivot_(1.0e-8),
  lower_(NULL),
  rowLowerWork_(NULL),
  columnLowerWork_(NULL),
  upper_(NULL),
  rowUpperWork_(NULL),
  columnUpperWork_(NULL),
  cost_(NULL),
  rowObjectiveWork_(NULL),
  objectiveWork_(NULL),
  sequenceIn_(-1),
  directionIn_(-1),
  sequenceOut_(-1),
  directionOut_(-1),
  pivotRow_(-1),
  lastGoodIteration_(-100),
  dj_(NULL),
  rowReducedCost_(NULL),
  reducedCostWork_(NULL),
  solution_(NULL),
  rowActivityWork_(NULL),
  columnActivityWork_(NULL),
  numberDualInfeasibilities_(0),
  numberDualInfeasibilitiesWithoutFree_(0),
  numberPrimalInfeasibilities_(100),
  numberRefinements_(0),
  pivotVariable_(NULL),
  factorization_(NULL),
  savedSolution_(NULL),
  numberTimesOptimal_(0),
  disasterArea_(NULL),
  changeMade_(1),
  algorithm_(0),
  forceFactorization_(-1),
  perturbation_(100),
  nonLinearCost_(NULL),
  lastBadIteration_(-999999),
  lastFlaggedIteration_(-999999),
  numberFake_(0),
  numberChanged_(0),
  progressFlag_(0),
  firstFree_(-1),
  numberExtraRows_(0),
  maximumBasic_(0),
  dontFactorizePivots_(0),
  incomingInfeasibility_(1.0),
  allowedInfeasibility_(10.0),
  automaticScale_(0),
  maximumPerturbationSize_(0),
  perturbationArray_(NULL),
  baseModel_(NULL)
{
  int i;
  for (i=0;i<6;i++) {
    rowArray_[i]=NULL;
    columnArray_[i]=NULL;
  }
  for (i=0;i<4;i++) {
    spareIntArray_[i]=0;
    spareDoubleArray_[i]=0.0;
  }
  saveStatus_=NULL;
  // get an empty factorization so we can set tolerances etc
  getEmptyFactorization();
  // Say sparse
  factorization_->sparseThreshold(1);
  // say Steepest pricing
  dualRowPivot_ = new ClpDualRowSteepest();
  // say Steepest pricing
  primalColumnPivot_ = new ClpPrimalColumnSteepest();
  solveType_=1; // say simplex based life form
  
}

// Subproblem constructor
ClpSimplex::ClpSimplex ( const ClpModel * rhs,
			 int numberRows, const int * whichRow,
			 int numberColumns, const int * whichColumn,
			 bool dropNames, bool dropIntegers,bool fixOthers)
  : ClpModel(rhs, numberRows, whichRow,
	     numberColumns,whichColumn,dropNames,dropIntegers),
    bestPossibleImprovement_(0.0),
    zeroTolerance_(1.0e-13),
    columnPrimalSequence_(-2),
    rowPrimalSequence_(-2), 
    bestObjectiveValue_(-COIN_DBL_MAX),
    moreSpecialOptions_(2),
    baseIteration_(0),
    primalToleranceToGetOptimal_(-1.0),
    largeValue_(1.0e15),
    largestPrimalError_(0.0),
    largestDualError_(0.0),
    alphaAccuracy_(-1.0),
    dualBound_(1.0e10),
    alpha_(0.0),
    theta_(0.0),
  lowerIn_(0.0),
  valueIn_(0.0),
  upperIn_(-COIN_DBL_MAX),
  dualIn_(0.0),
  lowerOut_(-1),
  valueOut_(-1),
  upperOut_(-1),
  dualOut_(-1),
  dualTolerance_(1.0e-7),
  primalTolerance_(1.0e-7),
  sumDualInfeasibilities_(0.0),
  sumPrimalInfeasibilities_(0.0),
  infeasibilityCost_(1.0e10),
  sumOfRelaxedDualInfeasibilities_(0.0),
  sumOfRelaxedPrimalInfeasibilities_(0.0),
  acceptablePivot_(1.0e-8),
  lower_(NULL),
  rowLowerWork_(NULL),
  columnLowerWork_(NULL),
  upper_(NULL),
  rowUpperWork_(NULL),
  columnUpperWork_(NULL),
  cost_(NULL),
  rowObjectiveWork_(NULL),
  objectiveWork_(NULL),
  sequenceIn_(-1),
  directionIn_(-1),
  sequenceOut_(-1),
  directionOut_(-1),
  pivotRow_(-1),
  lastGoodIteration_(-100),
  dj_(NULL),
  rowReducedCost_(NULL),
  reducedCostWork_(NULL),
  solution_(NULL),
  rowActivityWork_(NULL),
  columnActivityWork_(NULL),
  numberDualInfeasibilities_(0),
  numberDualInfeasibilitiesWithoutFree_(0),
  numberPrimalInfeasibilities_(100),
  numberRefinements_(0),
  pivotVariable_(NULL),
  factorization_(NULL),
    savedSolution_(NULL),
  numberTimesOptimal_(0),
  disasterArea_(NULL),
  changeMade_(1),
  algorithm_(0),
  forceFactorization_(-1),
  perturbation_(100),
  nonLinearCost_(NULL),
  lastBadIteration_(-999999),
  lastFlaggedIteration_(-999999),
  numberFake_(0),
  numberChanged_(0),
  progressFlag_(0),
  firstFree_(-1),
  numberExtraRows_(0),
  maximumBasic_(0),
  dontFactorizePivots_(0),
  incomingInfeasibility_(1.0),
  allowedInfeasibility_(10.0),
    automaticScale_(0),
  maximumPerturbationSize_(0),
  perturbationArray_(NULL),
  baseModel_(NULL)
{
  int i;
  for (i=0;i<6;i++) {
    rowArray_[i]=NULL;
    columnArray_[i]=NULL;
  }
  for (i=0;i<4;i++) {
    spareIntArray_[i]=0;
    spareDoubleArray_[i]=0.0;
  }
  saveStatus_=NULL;
  // get an empty factorization so we can set tolerances etc
  getEmptyFactorization();
  // say Steepest pricing
  dualRowPivot_ = new ClpDualRowSteepest();
  // say Steepest pricing
  primalColumnPivot_ = new ClpPrimalColumnSteepest();
  solveType_=1; // say simplex based life form
  if (fixOthers) {
    int numberOtherColumns=rhs->numberColumns();
    int numberOtherRows=rhs->numberRows();
    double * solution = new double [numberOtherColumns];
    CoinZeroN(solution,numberOtherColumns);
    int i;
    for (i=0;i<numberColumns;i++) {
      int iColumn = whichColumn[i];
      if (solution[iColumn])
        fixOthers=false; // duplicates
      solution[iColumn]=1.0;
    }
    if (fixOthers) {
      const double * otherSolution = rhs->primalColumnSolution();
      const double * objective = rhs->objective();
      double offset=0.0;
      for (i=0;i<numberOtherColumns;i++) {
        if (solution[i]) {
          solution[i]=0.0; // in
        } else {
          solution[i] = otherSolution[i];
          offset += objective[i]*otherSolution[i];
        }
      }
      double * rhsModification = new double [numberOtherRows];
      CoinZeroN(rhsModification,numberOtherRows);
      rhs->matrix()->times(solution,rhsModification) ;
      for ( i=0;i<numberRows;i++) {
        int iRow = whichRow[i];
        if (rowLower_[i]>-1.0e20)
          rowLower_[i] -= rhsModification[iRow];
        if (rowUpper_[i]<1.0e20)
          rowUpper_[i] -= rhsModification[iRow];
      }
      delete [] rhsModification;
      setObjectiveOffset(rhs->objectiveOffset()-offset);
      // And set objective value to match
      setObjectiveValue(rhs->objectiveValue());
    }
    delete [] solution;
  }  
}
// Subproblem constructor
ClpSimplex::ClpSimplex ( const ClpSimplex * rhs,
			 int numberRows, const int * whichRow,
			 int numberColumns, const int * whichColumn,
			 bool dropNames, bool dropIntegers,bool fixOthers)
  : ClpModel(rhs, numberRows, whichRow,
	     numberColumns,whichColumn,dropNames,dropIntegers),
    bestPossibleImprovement_(0.0),
    zeroTolerance_(1.0e-13),
    columnPrimalSequence_(-2),
    rowPrimalSequence_(-2), 
    bestObjectiveValue_(-COIN_DBL_MAX),
    moreSpecialOptions_(2),
    baseIteration_(0),
    primalToleranceToGetOptimal_(-1.0),
    largeValue_(1.0e15),
    largestPrimalError_(0.0),
    largestDualError_(0.0),
    alphaAccuracy_(-1.0),
    dualBound_(1.0e10),
    alpha_(0.0),
    theta_(0.0),
  lowerIn_(0.0),
  valueIn_(0.0),
  upperIn_(-COIN_DBL_MAX),
  dualIn_(0.0),
  lowerOut_(-1),
  valueOut_(-1),
  upperOut_(-1),
  dualOut_(-1),
  dualTolerance_(rhs->dualTolerance_),
  primalTolerance_(rhs->primalTolerance_),
  sumDualInfeasibilities_(0.0),
  sumPrimalInfeasibilities_(0.0),
  infeasibilityCost_(1.0e10),
  sumOfRelaxedDualInfeasibilities_(0.0),
  sumOfRelaxedPrimalInfeasibilities_(0.0),
  acceptablePivot_(1.0e-8),
  lower_(NULL),
  rowLowerWork_(NULL),
  columnLowerWork_(NULL),
  upper_(NULL),
  rowUpperWork_(NULL),
  columnUpperWork_(NULL),
  cost_(NULL),
  rowObjectiveWork_(NULL),
  objectiveWork_(NULL),
  sequenceIn_(-1),
  directionIn_(-1),
  sequenceOut_(-1),
  directionOut_(-1),
  pivotRow_(-1),
  lastGoodIteration_(-100),
  dj_(NULL),
  rowReducedCost_(NULL),
  reducedCostWork_(NULL),
  solution_(NULL),
  rowActivityWork_(NULL),
  columnActivityWork_(NULL),
  numberDualInfeasibilities_(0),
  numberDualInfeasibilitiesWithoutFree_(0),
  numberPrimalInfeasibilities_(100),
  numberRefinements_(0),
  pivotVariable_(NULL),
  factorization_(NULL),
    savedSolution_(NULL),
  numberTimesOptimal_(0),
  disasterArea_(NULL),
  changeMade_(1),
  algorithm_(0),
  forceFactorization_(-1),
  perturbation_(100),
  nonLinearCost_(NULL),
  lastBadIteration_(-999999),
  lastFlaggedIteration_(-999999),
  numberFake_(0),
  numberChanged_(0),
  progressFlag_(0),
  firstFree_(-1),
  numberExtraRows_(0),
  maximumBasic_(0),
  dontFactorizePivots_(0),
  incomingInfeasibility_(1.0),
  allowedInfeasibility_(10.0),
    automaticScale_(0),
  maximumPerturbationSize_(0),
  perturbationArray_(NULL),
  baseModel_(NULL)
{
  int i;
  for (i=0;i<6;i++) {
    rowArray_[i]=NULL;
    columnArray_[i]=NULL;
  }
  for (i=0;i<4;i++) {
    spareIntArray_[i]=0;
    spareDoubleArray_[i]=0.0;
  }
  saveStatus_=NULL;
  factorization_ = new ClpFactorization(*rhs->factorization_,-numberRows_);
  //factorization_ = new ClpFactorization(*rhs->factorization_,
  //				rhs->factorization_->goDenseThreshold());
  ClpDualRowDantzig * pivot =
    dynamic_cast< ClpDualRowDantzig*>(rhs->dualRowPivot_);
  // say Steepest pricing
  if (!pivot)
    dualRowPivot_ = new ClpDualRowSteepest();
  else
    dualRowPivot_ = new ClpDualRowDantzig();
  // say Steepest pricing
  primalColumnPivot_ = new ClpPrimalColumnSteepest();
  solveType_=1; // say simplex based life form
  if (fixOthers) {
    int numberOtherColumns=rhs->numberColumns();
    int numberOtherRows=rhs->numberRows();
    double * solution = new double [numberOtherColumns];
    CoinZeroN(solution,numberOtherColumns);
    int i;
    for (i=0;i<numberColumns;i++) {
      int iColumn = whichColumn[i];
      if (solution[iColumn])
        fixOthers=false; // duplicates
      solution[iColumn]=1.0;
    }
    if (fixOthers) {
      const double * otherSolution = rhs->primalColumnSolution();
      const double * objective = rhs->objective();
      double offset=0.0;
      for (i=0;i<numberOtherColumns;i++) {
        if (solution[i]) {
          solution[i]=0.0; // in
        } else {
          solution[i] = otherSolution[i];
          offset += objective[i]*otherSolution[i];
        }
      }
      double * rhsModification = new double [numberOtherRows];
      CoinZeroN(rhsModification,numberOtherRows);
      rhs->matrix()->times(solution,rhsModification) ;
      for ( i=0;i<numberRows;i++) {
        int iRow = whichRow[i];
        if (rowLower_[i]>-1.0e20)
          rowLower_[i] -= rhsModification[iRow];
        if (rowUpper_[i]<1.0e20)
          rowUpper_[i] -= rhsModification[iRow];
      }
      delete [] rhsModification;
      setObjectiveOffset(rhs->objectiveOffset()-offset);
      // And set objective value to match
      setObjectiveValue(rhs->objectiveValue());
    }
    delete [] solution;
  }
  if (rhs->maximumPerturbationSize_) {
    maximumPerturbationSize_ = 2*numberColumns;
    perturbationArray_ = new double [maximumPerturbationSize_];
    for (i=0;i<numberColumns;i++) {
      int iColumn = whichColumn[i];
      perturbationArray_[2*i]=rhs->perturbationArray_[2*iColumn];
      perturbationArray_[2*i+1]=rhs->perturbationArray_[2*iColumn+1];
    }
  }
}
// Puts solution back small model
void 
ClpSimplex::getbackSolution(const ClpSimplex & smallModel,const int * whichRow, const int * whichColumn)
{
  setSumDualInfeasibilities(smallModel.sumDualInfeasibilities());
  setNumberDualInfeasibilities(smallModel.numberDualInfeasibilities());
  setSumPrimalInfeasibilities(smallModel.sumPrimalInfeasibilities());
  setNumberPrimalInfeasibilities(smallModel.numberPrimalInfeasibilities());
  setNumberIterations(smallModel.numberIterations());
  setProblemStatus(smallModel.status());
  setObjectiveValue(smallModel.objectiveValue());
  const double * solution2 = smallModel.primalColumnSolution();
  int i;
  int numberRows2 = smallModel.numberRows();
  int numberColumns2 = smallModel.numberColumns();
  const double * dj2 = smallModel.dualColumnSolution();
  for ( i=0;i<numberColumns2;i++) {
    int iColumn = whichColumn[i];
    columnActivity_[iColumn]=solution2[i];
    reducedCost_[iColumn]=dj2[i];
    setStatus(iColumn,smallModel.getStatus(i));
  }
  const double * dual2 = smallModel.dualRowSolution();
  memset(dual_,0,numberRows_*sizeof(double));
  for (i=0;i<numberRows2;i++) {
    int iRow=whichRow[i];
    setRowStatus(iRow,smallModel.getRowStatus(i));
    dual_[iRow]=dual2[i];
  }
  CoinZeroN(rowActivity_,numberRows_);
#if 0
  if (!problemStatus_) {
    ClpDisjointCopyN(smallModel.objective(),smallModel.numberColumns_,smallModel.reducedCost_);
    smallModel.matrix_->transposeTimes(-1.0,smallModel.dual_,smallModel.reducedCost_);
    for (int i=0;i<smallModel.numberColumns_;i++) {
      if (smallModel.getColumnStatus(i)==basic)
	assert (fabs(smallModel.reducedCost_[i])<1.0e-5);
    }
    ClpDisjointCopyN(objective(),numberColumns_,reducedCost_);
    matrix_->transposeTimes(-1.0,dual_,reducedCost_);
    for (int i=0;i<numberColumns_;i++) {
      if (getColumnStatus(i)==basic)
	assert (fabs(reducedCost_[i])<1.0e-5);
    }
  }
#endif
  matrix()->times(columnActivity_,rowActivity_) ;
}

//-----------------------------------------------------------------------------

ClpSimplex::~ClpSimplex ()
{
  setPersistenceFlag(0);
  gutsOfDelete(0);
  delete nonLinearCost_;
}
//#############################################################################
void ClpSimplex::setLargeValue( double value) 
{
  if (value>0.0&&value<COIN_DBL_MAX)
    largeValue_=value;
}
int
ClpSimplex::gutsOfSolution ( double * givenDuals,
			     const double * givenPrimals,
			     bool valuesPass)
{


  // if values pass, save values of basic variables
  double * save = NULL;
  double oldValue=0.0;
  if (valuesPass) {
    assert(algorithm_>0); // only primal at present
    assert(nonLinearCost_);
    int iRow;
    checkPrimalSolution( rowActivityWork_, columnActivityWork_);
    // get correct bounds on all variables
    nonLinearCost_->checkInfeasibilities(primalTolerance_);
    oldValue = nonLinearCost_->largestInfeasibility();
    save = new double[numberRows_];
    for (iRow=0;iRow<numberRows_;iRow++) {
      int iPivot=pivotVariable_[iRow];
      save[iRow] = solution_[iPivot];
    }
  }
  // do work
  computePrimals(rowActivityWork_, columnActivityWork_);
  // If necessary - override results
  if (givenPrimals) {
    CoinMemcpyN(givenPrimals,numberColumns_,columnActivityWork_);
    memset(rowActivityWork_,0,numberRows_*sizeof(double));
    times(-1.0,columnActivityWork_,rowActivityWork_);
  }
  double objectiveModification = 0.0;
  if (algorithm_>0&&nonLinearCost_!=NULL) {
    // primal algorithm
    // get correct bounds on all variables
    // If  4 bit set - Force outgoing variables to exact bound (primal)
    if ((specialOptions_&4)==0)
      nonLinearCost_->checkInfeasibilities(primalTolerance_);
    else
      nonLinearCost_->checkInfeasibilities(0.0);
    objectiveModification += nonLinearCost_->changeInCost();
    if (nonLinearCost_->numberInfeasibilities())
      if (handler_->detail(CLP_SIMPLEX_NONLINEAR,messages_)<100) {
        handler_->message(CLP_SIMPLEX_NONLINEAR,messages_)
          <<nonLinearCost_->changeInCost()
          <<nonLinearCost_->numberInfeasibilities()
          <<CoinMessageEol;
      }
  }
  if (valuesPass) {
    double badInfeasibility = nonLinearCost_->largestInfeasibility();
#ifdef CLP_DEBUG
    std::cout<<"Largest given infeasibility "<<oldValue
	     <<" now "<<nonLinearCost_->largestInfeasibility()<<std::endl;
#endif
    int numberOut=0;
    // But may be very large rhs etc
    double useError = CoinMin(largestPrimalError_,
                              1.0e5/maximumAbsElement(solution_,numberRows_+numberColumns_));  
    if ((oldValue<incomingInfeasibility_||badInfeasibility>
         (CoinMax(10.0*allowedInfeasibility_,100.0*oldValue)))
	&&(badInfeasibility>CoinMax(incomingInfeasibility_,allowedInfeasibility_)||
	   useError>1.0e-3)) {
      //printf("Original largest infeas %g, now %g, primalError %g\n",
      //     oldValue,nonLinearCost_->largestInfeasibility(),
      //     largestPrimalError_);
      // throw out up to 1000 structurals
      int iRow;
      int * sort = new int[numberRows_];
      // first put back solution and store difference
      for (iRow=0;iRow<numberRows_;iRow++) {
	int iPivot=pivotVariable_[iRow];
	double difference = fabs(solution_[iPivot]-save[iRow]);
	solution_[iPivot]=save[iRow];
	save[iRow]=difference;
      }
      int numberBasic=0;
      for (iRow=0;iRow<numberRows_;iRow++) {
	int iPivot=pivotVariable_[iRow];

	if (iPivot<numberColumns_) {
	  // column
	  double difference= save[iRow];
	  if (difference>1.0e-4) {
	    sort[numberOut]=iRow;
	    save[numberOut++]=-difference;
            if (getStatus(iPivot)==basic)
              numberBasic++;
	  }
	}
      }
      if (!numberBasic) {
        //printf("no errors on basic - going to all slack - numberOut %d\n",numberOut);
#if 0
        allSlackBasis(true);
	CoinIotaN(pivotVariable_,numberRows_,numberColumns_);
#else
	// allow
	numberOut=0;
#endif
      } 
      CoinSort_2(save, save + numberOut, sort);
      numberOut = CoinMin(1000,numberOut);
      for (iRow=0;iRow<numberOut;iRow++) {
	int jRow=sort[iRow];
	int iColumn=pivotVariable_[jRow];
	setColumnStatus(iColumn,superBasic);
	setRowStatus(jRow,basic);
	pivotVariable_[jRow]=jRow+numberColumns_;
	if (fabs(solution_[iColumn])>1.0e10) {
	  if (upper_[iColumn]<0.0) {
	    solution_[iColumn]=upper_[iColumn];
	  } else if (lower_[iColumn]>0.0) {
	    solution_[iColumn]=lower_[iColumn];
	  } else {
	    solution_[iColumn]=0.0;
	  }
	}
      }
      delete [] sort;
    }
    delete [] save;
    if (numberOut)
      return numberOut;
  }
  if ((moreSpecialOptions_&128)!=0&&!numberIterations_) {
    //printf("trying feas pump\n");
    const char * integerType = integerInformation();
    assert (integerType);
    assert (perturbationArray_);
    CoinZeroN(cost_,numberRows_+numberColumns_);
    for (int i=0;i<numberRows_-numberRows_;i++) {
      int iSequence = pivotVariable_[i];
      if (iSequence<numberColumns_&&integerType[iSequence]) {
	double lower =lower_[iSequence];
	double upper = upper_[iSequence];
	double value = solution_[iSequence];
	if (value>=lower-primalTolerance_&&
	    value<=upper+primalTolerance_) {
	  double sign;
	  if (value-lower<upper-value) 
	    sign=1.0;
	  else
	    sign=-1.0;
	  cost_[iSequence]=sign*perturbationArray_[iSequence];
	}
      }
    }
  }
  computeDuals(givenDuals);
  if ((moreSpecialOptions_&128)!=0&&!numberIterations_) {
    const char * integerType = integerInformation();
    // Need to do columns and rows to stay dual feasible
    for (int iSequence=0;iSequence<numberColumns_;iSequence++) {
      if (integerType[iSequence]&&getStatus(iSequence)!=basic) {
	double djValue=dj_[iSequence];
	double change=0.0;
	if (getStatus(iSequence)==atLowerBound) 
	  change = CoinMax(-djValue,10.0*perturbationArray_[iSequence]);
	else if (getStatus(iSequence)==atUpperBound) 
	  change = CoinMin(-djValue,-10.0*perturbationArray_[iSequence]);
	cost_[iSequence]=change;
	dj_[iSequence]+=change;
      }
    }
  }

  // now check solutions
  //checkPrimalSolution( rowActivityWork_, columnActivityWork_);
  //checkDualSolution();
  checkBothSolutions();
  objectiveValue_ += objectiveModification/(objectiveScale_*rhsScale_);
  if (handler_->logLevel()>3||(largestPrimalError_>1.0e-2||
			       largestDualError_>1.0e-2)) 
    handler_->message(CLP_SIMPLEX_ACCURACY,messages_)
      <<largestPrimalError_
      <<largestDualError_
      <<CoinMessageEol;
  if (largestPrimalError_>1.0e-1&&numberRows_>100&&numberIterations_) {
      // Change factorization tolerance
    if (factorization_->zeroTolerance()>1.0e-18)
      factorization_->zeroTolerance(1.0e-18);
  }
  // Switch off false values pass indicator
  if (!valuesPass&&algorithm_>0)
    firstFree_ = -1;
  return 0;
}
void
ClpSimplex::computePrimals ( const double * rowActivities,
				     const double * columnActivities)
{

  //work space
  CoinIndexedVector  * workSpace = rowArray_[0];

  CoinIndexedVector * arrayVector = rowArray_[1];
  arrayVector->clear();
  CoinIndexedVector * previousVector = rowArray_[2];
  previousVector->clear();
  // accumulate non basic stuff 

  int iRow;
  // order is this way for scaling
  if (columnActivities!=columnActivityWork_)
    ClpDisjointCopyN(columnActivities,numberColumns_,columnActivityWork_);
  if (rowActivities!=rowActivityWork_)
    ClpDisjointCopyN(rowActivities,numberRows_,rowActivityWork_);
  double * array = arrayVector->denseVector();
  int * index = arrayVector->getIndices();
  int number=0;
  const double * rhsOffset = matrix_->rhsOffset(this,false,true);
  if (!rhsOffset) {
    // Use whole matrix every time to make it easier for ClpMatrixBase
    // So zero out basic
    for (iRow=0;iRow<numberRows_;iRow++) {
      int iPivot=pivotVariable_[iRow];
      assert (iPivot>=0);
      solution_[iPivot] = 0.0;
#ifdef CLP_INVESTIGATE
      assert (getStatus(iPivot)==basic);
#endif
    }
    // Extended solution before "update"
    matrix_->primalExpanded(this,0);
    times(-1.0,columnActivityWork_,array);
    for (iRow=0;iRow<numberRows_;iRow++) {
      double value = array[iRow] + rowActivityWork_[iRow];
      if (value) {
	array[iRow]=value;
	index[number++]=iRow;
      } else {
	array[iRow]=0.0;
      }
    }
  } else {
    // we have an effective rhs lying around
    // zero out basic (really just for slacks)
    for (iRow=0;iRow<numberRows_;iRow++) {
      int iPivot=pivotVariable_[iRow];
      solution_[iPivot] = 0.0;
    }
    for (iRow=0;iRow<numberRows_;iRow++) {
      double value = rhsOffset[iRow] + rowActivityWork_[iRow];
      if (value) {
	array[iRow]=value;
	index[number++]=iRow;
      } else {
	array[iRow]=0.0;
      }
    }
  }
  arrayVector->setNumElements(number);
#ifdef CLP_DEBUG
  if (numberIterations_==-3840) {
    int i;
    for (i=0;i<numberRows_+numberColumns_;i++)
      printf("%d status %d\n",i,status_[i]);
    printf("xxxxx1\n");
    for (i=0;i<numberRows_;i++)
      if (array[i])
	printf("%d rhs %g\n",i,array[i]);
    printf("xxxxx2\n");
    for (i=0;i<numberRows_+numberColumns_;i++)
      if (getStatus(i)!=basic)
	printf("%d non basic %g %g %g\n",i,lower_[i],solution_[i],upper_[i]);
    printf("xxxxx3\n");
  }
#endif
  // Ftran adjusted RHS and iterate to improve accuracy
  double lastError=COIN_DBL_MAX;
  int iRefine;
  CoinIndexedVector * thisVector = arrayVector;
  CoinIndexedVector * lastVector = previousVector;
  if (number)
    factorization_->updateColumn(workSpace,thisVector);
  double * work = workSpace->denseVector();
#ifdef CLP_DEBUG
  if (numberIterations_==-3840) {
    int i;
    for (i=0;i<numberRows_;i++)
      if (array[i])
	printf("%d after rhs %g\n",i,array[i]);
    printf("xxxxx4\n");
  }
#endif
  bool goodSolution=true;
  for (iRefine=0;iRefine<numberRefinements_+1;iRefine++) {

    int numberIn = thisVector->getNumElements();
    int * indexIn = thisVector->getIndices();
    double * arrayIn = thisVector->denseVector();
    // put solution in correct place
    if (!rhsOffset) {
      int j;
      for (j=0;j<numberIn;j++) {
	iRow = indexIn[j];
	int iPivot=pivotVariable_[iRow];
	solution_[iPivot] = arrayIn[iRow];
        //assert (fabs(solution_[iPivot])<1.0e100);
      }
    } else {
      for (iRow=0;iRow<numberRows_;iRow++) {
	int iPivot=pivotVariable_[iRow];
	solution_[iPivot] = arrayIn[iRow];
        //assert (fabs(solution_[iPivot])<1.0e100);
      }
    }
    // Extended solution after "update"
    matrix_->primalExpanded(this,1);
    // check Ax == b  (for all)
    // signal column generated matrix to just do basic (and gub)
    unsigned int saveOptions = specialOptions();
    setSpecialOptions(16);
    times(-1.0,columnActivityWork_,work);
    setSpecialOptions(saveOptions);
    largestPrimalError_=0.0;
    double multiplier = 131072.0;
    for (iRow=0;iRow<numberRows_;iRow++) {
      double value = work[iRow] + rowActivityWork_[iRow];
      work[iRow] = value*multiplier;
      if (fabs(value)>largestPrimalError_) {
	largestPrimalError_=fabs(value);
      }
    }
    if (largestPrimalError_>=lastError) {
      // restore
      CoinIndexedVector * temp = thisVector;
      thisVector = lastVector;
      lastVector=temp;
      goodSolution=false;
      break;
    }
    if (iRefine<numberRefinements_&&largestPrimalError_>1.0e-10) {
      // try and make better
      // save this
      CoinIndexedVector * temp = thisVector;
      thisVector = lastVector;
      lastVector=temp;
      int * indexOut = thisVector->getIndices();
      int number=0;
      array = thisVector->denseVector();
      thisVector->clear();
      for (iRow=0;iRow<numberRows_;iRow++) {
	double value = work[iRow];
	if (value) {
	  array[iRow]=value;
	  indexOut[number++]=iRow;
	  work[iRow]=0.0;
	}
      }
      thisVector->setNumElements(number);
      lastError=largestPrimalError_;
      factorization_->updateColumn(workSpace,thisVector);
      multiplier = 1.0/multiplier;
      double * previous = lastVector->denseVector();
      number=0;
      for (iRow=0;iRow<numberRows_;iRow++) {
	double value = previous[iRow] + multiplier*array[iRow];
	if (value) {
	  array[iRow]=value;
	  indexOut[number++]=iRow;
	} else {
	  array[iRow]=0.0;
	}
      }
      thisVector->setNumElements(number);
    } else {
      break;
    }
  }

  // solution as accurate as we are going to get
  ClpFillN(work,numberRows_,0.0);
  if (!goodSolution) {
    array = thisVector->denseVector();
    // put solution in correct place
    for (iRow=0;iRow<numberRows_;iRow++) {
      int iPivot=pivotVariable_[iRow];
      solution_[iPivot] = array[iRow];
      //assert (fabs(solution_[iPivot])<1.0e100);
    }
  }
  arrayVector->clear();
  previousVector->clear();
#ifdef CLP_DEBUG
  if (numberIterations_==-3840) {
    exit(77);
  }
#endif
}
// now dual side
void
ClpSimplex::computeDuals(double * givenDjs)
{
#ifndef SLIM_CLP
  if (objective_->type()==1||!objective_->activated()) {
#endif
    // Linear
    //work space
    CoinIndexedVector  * workSpace = rowArray_[0];
    
    CoinIndexedVector * arrayVector = rowArray_[1];
    arrayVector->clear();
    CoinIndexedVector * previousVector = rowArray_[2];
    previousVector->clear();
    int iRow;
#ifdef CLP_DEBUG
    workSpace->checkClear();
#endif
    double * array = arrayVector->denseVector();
    int * index = arrayVector->getIndices();
    int number=0;
    if (!givenDjs) {
      for (iRow=0;iRow<numberRows_;iRow++) {
	int iPivot=pivotVariable_[iRow];
	double value = cost_[iPivot];
	if (value) {
	  array[iRow]=value;
	  index[number++]=iRow;
	}
      }
    } else {
      // dual values pass - djs may not be zero
      for (iRow=0;iRow<numberRows_;iRow++) {
	int iPivot=pivotVariable_[iRow];
	// make sure zero if done
	if (!pivoted(iPivot))
	  givenDjs[iPivot]=0.0;
	double value =cost_[iPivot]-givenDjs[iPivot];
	if (value) {
	  array[iRow]=value;
	  index[number++]=iRow;
	}
      }
    }
    arrayVector->setNumElements(number);
    // Extended duals before "updateTranspose"
    matrix_->dualExpanded(this,arrayVector,givenDjs,0);
    
    // Btran basic costs and get as accurate as possible
    double lastError=COIN_DBL_MAX;
    int iRefine;
    double * work = workSpace->denseVector();
    CoinIndexedVector * thisVector = arrayVector;
    CoinIndexedVector * lastVector = previousVector;
    factorization_->updateColumnTranspose(workSpace,thisVector);
    
    for (iRefine=0;iRefine<numberRefinements_+1;iRefine++) {
      // check basic reduced costs zero
      largestDualError_=0.0;
      if (!numberExtraRows_) {
	// Just basic
	int * index2 = workSpace->getIndices();
	// use reduced costs for slacks as work array
	double * work2 = reducedCostWork_+numberColumns_;
	int numberStructurals=0;
	for (iRow=0;iRow<numberRows_;iRow++) {
	  int iPivot=pivotVariable_[iRow];
	  if (iPivot<numberColumns_) 
	    index2[numberStructurals++]=iPivot;
	}
	matrix_->listTransposeTimes(this,array,index2,numberStructurals,work2);
	numberStructurals=0;
	if (!givenDjs) {
	  for (iRow=0;iRow<numberRows_;iRow++) {
	    int iPivot=pivotVariable_[iRow];
	    double value;
	    if (iPivot>=numberColumns_) {
	      // slack
	      value = rowObjectiveWork_[iPivot-numberColumns_]
		+ array[iPivot-numberColumns_];
	    } else {
	      // column
	      value = objectiveWork_[iPivot]-work2[numberStructurals++];
	    }
	    work[iRow]=value;
	    if (fabs(value)>largestDualError_) {
	      largestDualError_=fabs(value);
	    }
	  }
	} else {
	  for (iRow=0;iRow<numberRows_;iRow++) {
	    int iPivot=pivotVariable_[iRow];
	    if (iPivot>=numberColumns_) {
	      // slack
	      work[iRow] = rowObjectiveWork_[iPivot-numberColumns_]
		+ array[iPivot-numberColumns_]-givenDjs[iPivot];
	    } else {
	      // column
	      work[iRow] = objectiveWork_[iPivot]-work2[numberStructurals++]
		- givenDjs[iPivot];
	    }
	    if (fabs(work[iRow])>largestDualError_) {
	      largestDualError_=fabs(work[iRow]);
	      //assert (largestDualError_<1.0e-7);
	      //if (largestDualError_>1.0e-7)
	      //printf("large dual error %g\n",largestDualError_);
	    }
	  }
	}
      } else {
	// extra rows - be more careful
#if 1
	// would be faster to do just for basic but this reduces code
	ClpDisjointCopyN(objectiveWork_,numberColumns_,reducedCostWork_);
	transposeTimes(-1.0,array,reducedCostWork_);
#else
	// Just basic
	int * index2 = workSpace->getIndices();
	int numberStructurals=0;
	for (iRow=0;iRow<numberRows_;iRow++) {
	  int iPivot=pivotVariable_[iRow];
	  if (iPivot<numberColumns_) 
	    index2[numberStructurals++]=iPivot;
	}
	matrix_->listTransposeTimes(this,array,index2,numberStructurals,work);
	for (iRow=0;iRow<numberStructurals;iRow++) {
	  int iPivot=index2[iRow];
	  reducedCostWork_[iPivot]=objectiveWork_[iPivot]-work[iRow];
	}
#endif
	// update by duals on sets
	matrix_->dualExpanded(this,NULL,NULL,1);
	if (!givenDjs) {
	  for (iRow=0;iRow<numberRows_;iRow++) {
	    int iPivot=pivotVariable_[iRow];
	    double value;
	    if (iPivot>=numberColumns_) {
	      // slack
	      value = rowObjectiveWork_[iPivot-numberColumns_]
		+ array[iPivot-numberColumns_];
	    } else {
	      // column
	      value = reducedCostWork_[iPivot];
	    }
	    work[iRow]=value;
	    if (fabs(value)>largestDualError_) {
	      largestDualError_=fabs(value);
	    }
	  }
	} else {
	  for (iRow=0;iRow<numberRows_;iRow++) {
	    int iPivot=pivotVariable_[iRow];
	    if (iPivot>=numberColumns_) {
	      // slack
	      work[iRow] = rowObjectiveWork_[iPivot-numberColumns_]
		+ array[iPivot-numberColumns_]-givenDjs[iPivot];
	    } else {
	      // column
	      work[iRow] = reducedCostWork_[iPivot]- givenDjs[iPivot];
	    }
	    if (fabs(work[iRow])>largestDualError_) {
	      largestDualError_=fabs(work[iRow]);
	      //assert (largestDualError_<1.0e-7);
	      //if (largestDualError_>1.0e-7)
	      //printf("large dual error %g\n",largestDualError_);
	    }
	  }
	}
      }
      if (largestDualError_>=lastError) {
	// restore
	CoinIndexedVector * temp = thisVector;
	thisVector = lastVector;
	lastVector=temp;
	break;
      }
      if (iRefine<numberRefinements_&&largestDualError_>1.0e-10
	  &&!givenDjs) {
	// try and make better
	// save this
	CoinIndexedVector * temp = thisVector;
	thisVector = lastVector;
	lastVector=temp;
	int * indexOut = thisVector->getIndices();
	int number=0;
	array = thisVector->denseVector();
	thisVector->clear();
	double multiplier = 131072.0;
	for (iRow=0;iRow<numberRows_;iRow++) {
	  double value = multiplier*work[iRow];
	  if (value) {
	    array[iRow]=value;
	    indexOut[number++]=iRow;
	    work[iRow]=0.0;
	  }
	  work[iRow]=0.0;
	}
	thisVector->setNumElements(number);
	lastError=largestDualError_;
	factorization_->updateColumnTranspose(workSpace,thisVector);
	multiplier = 1.0/multiplier;
	double * previous = lastVector->denseVector();
	number=0;
	for (iRow=0;iRow<numberRows_;iRow++) {
	  double value = previous[iRow] + multiplier*array[iRow];
	  if (value) {
	    array[iRow]=value;
	    indexOut[number++]=iRow;
	  } else {
	    array[iRow]=0.0;
	  }
	}
	thisVector->setNumElements(number);
      } else {
	break;
      }
    }
    // now look at dual solution
    array = thisVector->denseVector();
    for (iRow=0;iRow<numberRows_;iRow++) {
      // slack
      double value = array[iRow];
      dual_[iRow]=value;
      value += rowObjectiveWork_[iRow];
      rowReducedCost_[iRow]=value;
    }
    // can use work if problem scaled (for better cache)
    ClpPackedMatrix* clpMatrix =
      dynamic_cast< ClpPackedMatrix*>(matrix_);
    double * saveRowScale = rowScale_;
    //double * saveColumnScale = columnScale_;
    if (scaledMatrix_) {
      rowScale_=NULL;
      clpMatrix = scaledMatrix_;
    }
    if (clpMatrix&&(clpMatrix->flags()&2)==0) { 
      CoinIndexedVector * cVector = columnArray_[0];
      int * whichColumn = cVector->getIndices();
      assert (!cVector->getNumElements());
      int n=0;
      for (int i=0;i<numberColumns_;i++) {
	if (getColumnStatus(i)!=basic) {
	  whichColumn[n++]=i;
	  reducedCostWork_[i]=objectiveWork_[i];
	} else {
	  reducedCostWork_[i]=0.0;
	}
      }
      if (numberRows_>4000)
	clpMatrix->transposeTimesSubset(n,whichColumn,dual_,reducedCostWork_,
				rowScale_,columnScale_,work);
      else
	clpMatrix->transposeTimesSubset(n,whichColumn,dual_,reducedCostWork_,
				rowScale_,columnScale_,NULL);
    } else {
      ClpDisjointCopyN(objectiveWork_,numberColumns_,reducedCostWork_);
      if (numberRows_>4000)
	matrix_->transposeTimes(-1.0,dual_,reducedCostWork_,
				rowScale_,columnScale_,work);
      else
	matrix_->transposeTimes(-1.0,dual_,reducedCostWork_,
				rowScale_,columnScale_,NULL);
    }
    rowScale_ = saveRowScale;
    //columnScale_ = saveColumnScale;
    ClpFillN(work,numberRows_,0.0);
    // Extended duals and check dual infeasibility
    if (!matrix_->skipDualCheck()||algorithm_<0||problemStatus_!=-2) 
      matrix_->dualExpanded(this,NULL,NULL,2);
    // If necessary - override results
    if (givenDjs) {
      // restore accurate duals
      CoinMemcpyN(dj_,(numberRows_+numberColumns_),givenDjs);
    }
    arrayVector->clear();
    previousVector->clear();
#ifndef SLIM_CLP
  } else {
    // Nonlinear
    objective_->reducedGradient(this,dj_,false);
    // get dual_ by moving from reduced costs for slacks
    CoinMemcpyN(dj_+numberColumns_,numberRows_,dual_);
  }
#endif
}
/* Given an existing factorization computes and checks 
   primal and dual solutions.  Uses input arrays for variables at
   bounds.  Returns feasibility states */
int ClpSimplex::getSolution ( const double * /*rowActivities*/,
			      const double * /*columnActivities*/)
{
  if (!factorization_->status()) {
    // put in standard form
    createRim(7+8+16+32,false,-1);
    if (pivotVariable_[0]<0)
      internalFactorize(0);
    // do work
    gutsOfSolution ( NULL,NULL);
    // release extra memory
    deleteRim(0);
  }
  return factorization_->status();
}
/* Given an existing factorization computes and checks 
   primal and dual solutions.  Uses current problem arrays for
   bounds.  Returns feasibility states */
int ClpSimplex::getSolution ( )
{
  double * rowActivities = new double[numberRows_];
  double * columnActivities = new double[numberColumns_];
  ClpDisjointCopyN ( rowActivityWork_, numberRows_ , rowActivities);
  ClpDisjointCopyN ( columnActivityWork_, numberColumns_ , columnActivities);
  int status = getSolution( rowActivities, columnActivities);
  delete [] rowActivities;
  delete [] columnActivities;
  return status;
}
// Factorizes using current basis.  This is for external use
// Return codes are as from ClpFactorization
int ClpSimplex::factorize ()
{
  // put in standard form
  createRim(7+8+16+32,false);
  // do work
  int status = internalFactorize(-1);
  // release extra memory
  deleteRim(0);

  return status;
}
// Clean up status
void 
ClpSimplex::cleanStatus()
{
  int iRow,iColumn;
  int numberBasic=0;
  // make row activities correct
  memset(rowActivityWork_,0,numberRows_*sizeof(double));
  times(1.0,columnActivityWork_,rowActivityWork_);
  if (!status_)
    createStatus();
  for (iRow=0;iRow<numberRows_;iRow++) {
    if (getRowStatus(iRow)==basic) 
      numberBasic++;
    else {
      setRowStatus(iRow,superBasic);
      // but put to bound if close
      if (fabs(rowActivityWork_[iRow]-rowLowerWork_[iRow])
	  <=primalTolerance_) {
	rowActivityWork_[iRow]=rowLowerWork_[iRow];
	setRowStatus(iRow,atLowerBound);
      } else if (fabs(rowActivityWork_[iRow]-rowUpperWork_[iRow])
		 <=primalTolerance_) {
	rowActivityWork_[iRow]=rowUpperWork_[iRow];
	setRowStatus(iRow,atUpperBound);
      }
    }
  }
  for (iColumn=0;iColumn<numberColumns_;iColumn++) {
    if (getColumnStatus(iColumn)==basic) {
      if (numberBasic==numberRows_) {
	// take out of basis
	setColumnStatus(iColumn,superBasic);
	// but put to bound if close
	if (fabs(columnActivityWork_[iColumn]-columnLowerWork_[iColumn])
	    <=primalTolerance_) {
	  columnActivityWork_[iColumn]=columnLowerWork_[iColumn];
	  setColumnStatus(iColumn,atLowerBound);
	} else if (fabs(columnActivityWork_[iColumn]
			-columnUpperWork_[iColumn])
		   <=primalTolerance_) {
	  columnActivityWork_[iColumn]=columnUpperWork_[iColumn];
	  setColumnStatus(iColumn,atUpperBound);
	}
      } else 
	numberBasic++;
    } else {
      setColumnStatus(iColumn,superBasic);
      // but put to bound if close
      if (fabs(columnActivityWork_[iColumn]-columnLowerWork_[iColumn])
	  <=primalTolerance_) {
	columnActivityWork_[iColumn]=columnLowerWork_[iColumn];
	setColumnStatus(iColumn,atLowerBound);
      } else if (fabs(columnActivityWork_[iColumn]
		      -columnUpperWork_[iColumn])
		 <=primalTolerance_) {
	columnActivityWork_[iColumn]=columnUpperWork_[iColumn];
	setColumnStatus(iColumn,atUpperBound);
      }
    }
  }
}

/* Factorizes using current basis.  
   solveType - 1 iterating, 0 initial, -1 external 
   - 2 then iterating but can throw out of basis
   If 10 added then in primal values pass
   Return codes are as from ClpFactorization unless initial factorization
   when total number of singularities is returned.
   Special case is numberRows_+1 -> all slack basis.
*/
int ClpSimplex::internalFactorize ( int solveType)
{
  int iRow,iColumn;
  int totalSlacks=numberRows_;
  if (!status_)
    createStatus();

  bool valuesPass=false;
  if (solveType>=10) {
    valuesPass=true;
    solveType -= 10;
  }
#ifdef CLP_DEBUG
  if (solveType>0) {
    int numberFreeIn=0,numberFreeOut=0;
    double biggestDj=0.0;
    for (iColumn=0;iColumn<numberColumns_;iColumn++) {
      switch(getColumnStatus(iColumn)) {

      case basic:
	if (columnLower_[iColumn]<-largeValue_
	    &&columnUpper_[iColumn]>largeValue_) 
	  numberFreeIn++;
	break;
      default:
	if (columnLower_[iColumn]<-largeValue_
	    &&columnUpper_[iColumn]>largeValue_) {
	  numberFreeOut++;
	  biggestDj = CoinMax(fabs(dj_[iColumn]),biggestDj);
	}
	break;
      }
    }
    if (numberFreeIn+numberFreeOut)
      printf("%d in basis, %d out - largest dj %g\n",
	     numberFreeIn,numberFreeOut,biggestDj);
  }
#endif
  if (solveType<=0) {
    // Make sure everything is clean
    for (iRow=0;iRow<numberRows_;iRow++) {
      if(getRowStatus(iRow)==isFixed) {
	// double check fixed
	if (rowUpperWork_[iRow]>rowLowerWork_[iRow])
	  setRowStatus(iRow,atLowerBound);
      } else if (getRowStatus(iRow)==isFree) {
	// may not be free after all
	if (rowLowerWork_[iRow]>-largeValue_||rowUpperWork_[iRow]<largeValue_)
	  setRowStatus(iRow,superBasic);
      }
    }
    for (iColumn=0;iColumn<numberColumns_;iColumn++) {
      if(getColumnStatus(iColumn)==isFixed) {
	// double check fixed
	if (columnUpperWork_[iColumn]>columnLowerWork_[iColumn])
	  setColumnStatus(iColumn,atLowerBound);
      } else if (getColumnStatus(iColumn)==isFree) {
	// may not be free after all
	if (columnLowerWork_[iColumn]>-largeValue_||columnUpperWork_[iColumn]<largeValue_)
	  setColumnStatus(iColumn,superBasic);
      }
    }
    if (!valuesPass) {
      // not values pass so set to bounds
      bool allSlack=true;
      if (status_) {
	for (iRow=0;iRow<numberRows_;iRow++) {
	  if (getRowStatus(iRow)!=basic) {
	    allSlack=false;
	    break;
	  }
	}
      }
      if (!allSlack) {
	//#define CLP_INVESTIGATE2
#ifdef CLP_INVESTIGATE3
	int numberTotal=numberRows_+numberColumns_;
	double * saveSol = valuesPass ? 
	  CoinCopyOfArray(solution_,numberTotal) : NULL;
#endif
	// set values from warm start (if sensible)
	int numberBasic=0;
	for (iRow=0;iRow<numberRows_;iRow++) {
	  switch(getRowStatus(iRow)) {
	    
	  case basic:
	    numberBasic++;
	    break;
	  case atUpperBound:
	    rowActivityWork_[iRow]=rowUpperWork_[iRow];
	    if (rowActivityWork_[iRow]>largeValue_) {
	      if (rowLowerWork_[iRow]>-largeValue_) {
		rowActivityWork_[iRow]=rowLowerWork_[iRow];
		setRowStatus(iRow,atLowerBound);
	      } else {
		// say free
		setRowStatus(iRow,isFree);
		rowActivityWork_[iRow]=0.0;
	      }
	    }
	    break;
	  case ClpSimplex::isFixed:
	  case atLowerBound:
	    rowActivityWork_[iRow]=rowLowerWork_[iRow];
	    if (rowActivityWork_[iRow]<-largeValue_) {
	      if (rowUpperWork_[iRow]<largeValue_) {
		rowActivityWork_[iRow]=rowUpperWork_[iRow];
		setRowStatus(iRow,atUpperBound);
	      } else {
		// say free
		setRowStatus(iRow,isFree);
		rowActivityWork_[iRow]=0.0;
	      }
	    }
	    break;
	  case isFree:
	      break;
	    // not really free - fall through to superbasic
	  case superBasic:
	    if (rowUpperWork_[iRow]>largeValue_) {
	      if (rowLowerWork_[iRow]>-largeValue_) {
		rowActivityWork_[iRow]=rowLowerWork_[iRow];
		setRowStatus(iRow,atLowerBound);
	      } else {
		// say free
		setRowStatus(iRow,isFree);
		rowActivityWork_[iRow]=0.0;
	      }
	    } else {
	      if (rowLowerWork_[iRow]>-largeValue_) {
		// set to nearest
		if (fabs(rowActivityWork_[iRow]-rowLowerWork_[iRow])
		    <fabs(rowActivityWork_[iRow]-rowLowerWork_[iRow])) {
		  rowActivityWork_[iRow]=rowLowerWork_[iRow];
		  setRowStatus(iRow,atLowerBound);
		} else {
		  rowActivityWork_[iRow]=rowUpperWork_[iRow];
		  setRowStatus(iRow,atUpperBound);
		}
	      } else {
		rowActivityWork_[iRow]=rowUpperWork_[iRow];
		setRowStatus(iRow,atUpperBound);
	      }
	    }
	    break;
	  }
	}
	totalSlacks=numberBasic;

	for (iColumn=0;iColumn<numberColumns_;iColumn++) {
	  switch(getColumnStatus(iColumn)) {
	    
	  case basic:
	    if (numberBasic==maximumBasic_) {
	      // take out of basis
	      if (columnLowerWork_[iColumn]>-largeValue_) {
		if (columnActivityWork_[iColumn]-columnLowerWork_[iColumn]<
		    columnUpperWork_[iColumn]-columnActivityWork_[iColumn]) {
		  columnActivityWork_[iColumn]=columnLowerWork_[iColumn];
		  setColumnStatus(iColumn,atLowerBound);
		} else {
		  columnActivityWork_[iColumn]=columnUpperWork_[iColumn];
		  setColumnStatus(iColumn,atUpperBound);
		}
	      } else if (columnUpperWork_[iColumn]<largeValue_) {
		columnActivityWork_[iColumn]=columnUpperWork_[iColumn];
		setColumnStatus(iColumn,atUpperBound);
	      } else {
		columnActivityWork_[iColumn]=0.0;
		setColumnStatus(iColumn,isFree);
	      }
	    } else {
	      numberBasic++;
	    }
	    break;
	  case atUpperBound:
	    columnActivityWork_[iColumn]=columnUpperWork_[iColumn];
	    if (columnActivityWork_[iColumn]>largeValue_) {
	      if (columnLowerWork_[iColumn]<-largeValue_) {
		columnActivityWork_[iColumn]=0.0;
		setColumnStatus(iColumn,isFree);
	      } else {
		columnActivityWork_[iColumn]=columnLowerWork_[iColumn];
		setColumnStatus(iColumn,atLowerBound);
	      }
	    }
	    break;
	  case isFixed:
	  case atLowerBound:
	    columnActivityWork_[iColumn]=columnLowerWork_[iColumn];
	    if (columnActivityWork_[iColumn]<-largeValue_) {
	      if (columnUpperWork_[iColumn]>largeValue_) {
		columnActivityWork_[iColumn]=0.0;
		setColumnStatus(iColumn,isFree);
	      } else {
		columnActivityWork_[iColumn]=columnUpperWork_[iColumn];
		setColumnStatus(iColumn,atUpperBound);
	      }
	    }
	    break;
	  case isFree:
	      break;
	    // not really free - fall through to superbasic
	  case superBasic:
	    if (columnUpperWork_[iColumn]>largeValue_) {
	      if (columnLowerWork_[iColumn]>-largeValue_) {
		columnActivityWork_[iColumn]=columnLowerWork_[iColumn];
		setColumnStatus(iColumn,atLowerBound);
	      } else {
		// say free
		setColumnStatus(iColumn,isFree);
		columnActivityWork_[iColumn]=0.0;
	      }
	    } else {
	      if (columnLowerWork_[iColumn]>-largeValue_) {
		// set to nearest
		if (fabs(columnActivityWork_[iColumn]-columnLowerWork_[iColumn])
		    <fabs(columnActivityWork_[iColumn]-columnLowerWork_[iColumn])) {
		  columnActivityWork_[iColumn]=columnLowerWork_[iColumn];
		  setColumnStatus(iColumn,atLowerBound);
		} else {
		  columnActivityWork_[iColumn]=columnUpperWork_[iColumn];
		  setColumnStatus(iColumn,atUpperBound);
		}
	      } else {
		columnActivityWork_[iColumn]=columnUpperWork_[iColumn];
		setColumnStatus(iColumn,atUpperBound);
	      }
	    }
	    break;
	  }
	}
#ifdef CLP_INVESTIGATE3
	if (saveSol) {
	  int numberChanged=0;
	  double largestChanged=0.0;
	  for (int i=0;i<numberTotal;i++) {
	    double difference = fabs(solution_[i]-saveSol[i]);
	    if (difference>1.0e-7) {
	      numberChanged++;
	      if (difference>largestChanged)
		largestChanged=difference;
	    }
	  }
	  if (numberChanged)
	    printf("%d changed, largest %g\n",numberChanged,largestChanged);
	  delete [] saveSol;
	}
#endif
#if 0
	if (numberBasic<numberRows_) {
	  // add some slacks in case odd warmstart
#ifdef CLP_INVESTIGATE
	  printf("BAD %d basic, %d rows %d slacks\n",
		 numberBasic,numberRows_,totalSlacks);
#endif
	  int iRow=numberRows_-1;
	  while (numberBasic<numberRows_) {
	    if (getRowStatus(iRow)!=basic) {
	      setRowStatus(iRow,basic);
	      numberBasic++;
	      totalSlacks++;
	      iRow--;
	    } else {
	      break;
	    }
	  }
	}
#endif
      } else {
	// all slack basis
	int numberBasic=0;
	if (!status_) {
	  createStatus();
	}
	for (iRow=0;iRow<numberRows_;iRow++) {
	  double lower=rowLowerWork_[iRow];
	  double upper=rowUpperWork_[iRow];
	  if (lower>-largeValue_||upper<largeValue_) {
	    if (fabs(lower)<=fabs(upper)) {
	      rowActivityWork_[iRow]=lower;
	    } else {
	      rowActivityWork_[iRow]=upper;
	    }
	  } else {
	    rowActivityWork_[iRow]=0.0;
	  }
	  setRowStatus(iRow,basic);
	  numberBasic++;
	}
	for (iColumn=0;iColumn<numberColumns_;iColumn++) {
	  double lower=columnLowerWork_[iColumn];
	  double upper=columnUpperWork_[iColumn];
	  double big_bound = largeValue_;
	  if (lower>-big_bound||upper<big_bound) {
	    if ((getColumnStatus(iColumn)==atLowerBound&&
		 columnActivityWork_[iColumn]==lower)||
		(getColumnStatus(iColumn)==atUpperBound&&
		 columnActivityWork_[iColumn]==upper)) {
	      // status looks plausible
	    } else {
	      // set to sensible
	      if (fabs(lower)<=fabs(upper)) {
		setColumnStatus(iColumn,atLowerBound);
		columnActivityWork_[iColumn]=lower;
	      } else {
		setColumnStatus(iColumn,atUpperBound);
		columnActivityWork_[iColumn]=upper;
	      }
	    }
	  } else {
	    setColumnStatus(iColumn,isFree);
	    columnActivityWork_[iColumn]=0.0;
	  }
	}
      }
    } else {
      // values pass has less coding
      // make row activities correct and clean basis a bit
      cleanStatus();
      if (status_) {
	int numberBasic=0;
	for (iRow=0;iRow<numberRows_;iRow++) {
	  if (getRowStatus(iRow)==basic) 
	    numberBasic++;
	}
	totalSlacks=numberBasic;
#if 0
	for (iColumn=0;iColumn<numberColumns_;iColumn++) {
	  if (getColumnStatus(iColumn)==basic) 
	    numberBasic++;
	}
#endif
      } else {
	// all slack basis
	int numberBasic=0;
	if (!status_) {
	  createStatus();
	}
	for (iRow=0;iRow<numberRows_;iRow++) {
	  setRowStatus(iRow,basic);
	  numberBasic++;
	}
	for (iColumn=0;iColumn<numberColumns_;iColumn++) {
	  setColumnStatus(iColumn,superBasic);
	  // but put to bound if close
	  if (fabs(columnActivityWork_[iColumn]-columnLowerWork_[iColumn])
	      <=primalTolerance_) {
	    columnActivityWork_[iColumn]=columnLowerWork_[iColumn];
	    setColumnStatus(iColumn,atLowerBound);
	  } else if (fabs(columnActivityWork_[iColumn]
			-columnUpperWork_[iColumn])
		     <=primalTolerance_) {
	    columnActivityWork_[iColumn]=columnUpperWork_[iColumn];
	    setColumnStatus(iColumn,atUpperBound);
	  }
	}
      }
    }
    numberRefinements_=1;
    // set fixed if they are
    for (iRow=0;iRow<numberRows_;iRow++) {
      if (getRowStatus(iRow)!=basic ) {
	if (rowLowerWork_[iRow]==rowUpperWork_[iRow]) {
	  rowActivityWork_[iRow]=rowLowerWork_[iRow];
	  setRowStatus(iRow,isFixed);
	}
      }
    }
    for (iColumn=0;iColumn<numberColumns_;iColumn++) {
      if (getColumnStatus(iColumn)!=basic ) {
	if (columnLowerWork_[iColumn]==columnUpperWork_[iColumn]) {
	  columnActivityWork_[iColumn]=columnLowerWork_[iColumn];
	  setColumnStatus(iColumn,isFixed);
	}
      }
    }
  }
  //for (iRow=0;iRow<numberRows_+numberColumns_;iRow++) {
  //if (fabs(solution_[iRow])>1.0e10) {
  //  printf("large %g at %d - status %d\n",
  //         solution_[iRow],iRow,status_[iRow]);
  //}
  //}
  if (0)  {
    static int k=0;
    printf("start basis\n");
    int i;
    for (i=0;i<numberRows_;i++)
      printf ("xx %d %d\n",i,pivotVariable_[i]);
    for (i=0;i<numberRows_+numberColumns_;i++)
      if (getColumnStatus(i)==basic)
	printf ("yy %d basic\n",i);
    if (k>20)
      exit(0);
    k++;
  }
  int status = factorization_->factorize(this, solveType,valuesPass);
  if (status) {
    handler_->message(CLP_SIMPLEX_BADFACTOR,messages_)
      <<status
      <<CoinMessageEol;
    return -1;
  } else if (!solveType) {
    // Initial basis - return number of singularities
    int numberSlacks=0;
    for (iRow=0;iRow<numberRows_;iRow++) {
      if (getRowStatus(iRow) == basic)
	numberSlacks++;
    }
    status= CoinMax(numberSlacks-totalSlacks,0);
    // special case if all slack
    if (numberSlacks==numberRows_) {
      status=numberRows_+1;
    }
  }

  // sparse methods
  //if (factorization_->sparseThreshold()) {
    // get default value
    factorization_->sparseThreshold(0);
    factorization_->goSparse();
    //}
  
  return status;
}
/* 
   This does basis housekeeping and does values for in/out variables.
   Can also decide to re-factorize
*/
int 
ClpSimplex::housekeeping(double objectiveChange)
{
  // save value of incoming and outgoing
  double oldIn = solution_[sequenceIn_];
  double oldOut = solution_[sequenceOut_];
  numberIterations_++;
  changeMade_++; // something has happened
  // incoming variable
  if (handler_->logLevel()>7) {
    //if (handler_->detail(CLP_SIMPLEX_HOUSE1,messages_)<100) {
    handler_->message(CLP_SIMPLEX_HOUSE1,messages_)
      <<directionOut_
      <<directionIn_<<theta_
      <<dualOut_<<dualIn_<<alpha_
      <<CoinMessageEol;
    if (getStatus(sequenceIn_)==isFree) {
      handler_->message(CLP_SIMPLEX_FREEIN,messages_)
        <<sequenceIn_
        <<CoinMessageEol;
    }
  }
#if 0
  printf("h1 %d %d %g %g %g %g",
      directionOut_
      ,directionIn_,theta_
	 ,dualOut_,dualIn_,alpha_);
#endif
  // change of incoming
  char rowcol[]={'R','C'};
  if (pivotRow_>=0)
    pivotVariable_[pivotRow_]=sequenceIn();
  if (upper_[sequenceIn_]>1.0e20&&lower_[sequenceIn_]<-1.0e20)
    progressFlag_ |= 2; // making real progress
  solution_[sequenceIn_]=valueIn_;
  if (upper_[sequenceOut_]-lower_[sequenceOut_]<1.0e-12)
    progressFlag_ |= 1; // making real progress
  if (sequenceIn_!=sequenceOut_) {
    if (alphaAccuracy_>0.0) {
      double value = fabs(alpha_);
      if (value>1.0)
	alphaAccuracy_ *= value;
      else
	alphaAccuracy_ /= value;
    }
    //assert( getStatus(sequenceOut_)== basic);
    setStatus(sequenceIn_,basic);
    if (upper_[sequenceOut_]-lower_[sequenceOut_]>0) {
      // As Nonlinear costs may have moved bounds (to more feasible)
      // Redo using value
      if (fabs(valueOut_-lower_[sequenceOut_])<fabs(valueOut_-upper_[sequenceOut_])) {
	// going to lower
	setStatus(sequenceOut_,atLowerBound);
	oldOut = lower_[sequenceOut_];
      } else {
	// going to upper
	setStatus(sequenceOut_,atUpperBound);
	oldOut = upper_[sequenceOut_];
      }
    } else {
      // fixed
      setStatus(sequenceOut_,isFixed);
    }
    solution_[sequenceOut_]=valueOut_;
  } else {
    //if (objective_->type()<2)
    //assert (fabs(theta_)>1.0e-13);
    // flip from bound to bound
    // As Nonlinear costs may have moved bounds (to more feasible)
    // Redo using value
    if (fabs(valueIn_-lower_[sequenceIn_])<fabs(valueIn_-upper_[sequenceIn_])) {
      // as if from upper bound
      setStatus(sequenceIn_, atLowerBound);
    } else {
      // as if from lower bound
      setStatus(sequenceIn_, atUpperBound);
    }
  }
  
  // Update hidden stuff e.g. effective RHS and gub
  matrix_->updatePivot(this,oldIn,oldOut);
  objectiveValue_ += objectiveChange/(objectiveScale_*rhsScale_);
  if (handler_->logLevel()>7) {
    //if (handler_->detail(CLP_SIMPLEX_HOUSE2,messages_)<100) {
    handler_->message(CLP_SIMPLEX_HOUSE2,messages_)
      <<numberIterations_<<objectiveValue()
      <<rowcol[isColumn(sequenceIn_)]<<sequenceWithin(sequenceIn_)
      <<rowcol[isColumn(sequenceOut_)]<<sequenceWithin(sequenceOut_);
    handler_->printing(algorithm_<0)<<dualOut_<<theta_;
    handler_->printing(algorithm_>0)<<dualIn_<<theta_;
    handler_->message()<<CoinMessageEol;
  }
#if 0
  if (numberIterations_>10000)
  printf(" it %d %g %c%d %c%d\n"
      ,numberIterations_,objectiveValue()
      ,rowcol[isColumn(sequenceIn_)],sequenceWithin(sequenceIn_)
	 ,rowcol[isColumn(sequenceOut_)],sequenceWithin(sequenceOut_));
#endif
  if (trustedUserPointer_&&trustedUserPointer_->typeStruct==1) {
    if (algorithm_>0&&integerType_&&!nonLinearCost_->numberInfeasibilities()) {
      if (fabs(theta_)>1.0e-6||!numberIterations_) {
	// For saving solutions
	typedef struct {
	  int numberSolutions;
	  int maximumSolutions;
	  int numberColumns;
	  double ** solution;
	  int * numberUnsatisfied;
	} clpSolution;
	clpSolution * solution = reinterpret_cast<clpSolution *> (trustedUserPointer_->data); 
	if (solution->numberSolutions==solution->maximumSolutions) {
	  int n =  solution->maximumSolutions;
	  int n2 = (n*3)/2+10;
	  solution->maximumSolutions=n2;
	  double ** temp = new double * [n2];
	  for (int i=0;i<n;i++)
	    temp[i]=solution->solution[i];
	  delete [] solution->solution;
	  solution->solution=temp;
	  int * tempN = new int [n2];
	  for (int i=0;i<n;i++)
	    tempN[i] = solution->numberUnsatisfied[i];
	  delete [] solution->numberUnsatisfied;
	  solution->numberUnsatisfied = tempN;
	}
	assert (numberColumns_==solution->numberColumns);
	double * sol = new double [numberColumns_];
	solution->solution[solution->numberSolutions]=sol;
	int numberFixed=0;
	int numberUnsat=0;
	int numberSat=0;
	double sumUnsat=0.0;
	double tolerance = 10.0*primalTolerance_;
	double mostAway=0.0;
	int iAway=-1;
	for (int i=0;i<numberColumns_;i++) {
	  // Save anyway
	  sol[i] = columnScale_ ? solution_[i]*columnScale_[i] : solution_[i];
	  // rest is optional
	  if (upper_[i]>lower_[i]) {
	    double value = solution_[i];
	    if (value>lower_[i]+tolerance&&
		value<upper_[i]-tolerance&&integerType_[i]) {
	      // may have to modify value if scaled
	      if (columnScale_)
		value *= columnScale_[i];
	      double closest = floor(value+0.5);
	      // problem may be perturbed so relax test
	      if (fabs(value-closest)>1.0e-4) {
		numberUnsat++;
		sumUnsat += fabs(value-closest);
		if (mostAway<fabs(value-closest)) {
		  mostAway=fabs(value-closest);
		  iAway=i;
		}
	      } else {
		numberSat++;
	      }
	    } else {
	      numberSat++;
	    }
	  } else {
	    numberFixed++;
	  }
	}
	solution->numberUnsatisfied[solution->numberSolutions++]=numberUnsat;
	printf("iteration %d, %d unsatisfied (%g,%g), %d fixed, %d satisfied\n",
	       numberIterations_,numberUnsat,sumUnsat,mostAway,numberFixed,numberSat);
      }
    }
  }
  if (hitMaximumIterations())
    return 2;
#if 1
  //if (numberIterations_>14000)
  //handler_->setLogLevel(63);
  //if (numberIterations_>24000)
  //exit(77);
  // check for small cycles
  int in = sequenceIn_;
  int out = sequenceOut_;
  matrix_->correctSequence(this,in,out);
  int cycle=progress_.cycle(in,out,
			    directionIn_,directionOut_);
  if (cycle>0&&objective_->type()<2) {
    //if (cycle>0) {
    if (handler_->logLevel()>=63)
      printf("Cycle of %d\n",cycle);
    // reset
    progress_.startCheck();
    double random = randomNumberGenerator_.randomDouble();
    int extra = static_cast<int> (9.999*random);
    int off[]={1,1,1,1,2,2,2,3,3,4};
    if (factorization_->pivots()>cycle) {
      forceFactorization_=CoinMax(1,cycle-off[extra]);
    } else {
      // need to reject something
      int iSequence;
      if (algorithm_>0)
	iSequence = sequenceIn_;
      else
	iSequence = sequenceOut_;
      char x = isColumn(iSequence) ? 'C' :'R';
      if (handler_->logLevel()>=63)
	handler_->message(CLP_SIMPLEX_FLAG,messages_)
	  <<x<<sequenceWithin(iSequence)
	  <<CoinMessageEol;
      setFlagged(iSequence);
      //printf("flagging %d\n",iSequence);
    }
    return 1;
  }
#endif
  // only time to re-factorize if one before real time
  // this is so user won't be surprised that maximumPivots has exact meaning
  int numberPivots=factorization_->pivots();
  int maximumPivots = factorization_->maximumPivots();
  int numberDense = factorization_->numberDense();
  bool dontInvert = ((specialOptions_&16384)!=0&&numberIterations_*3>
		     2*maximumIterations());
  if (numberPivots==maximumPivots||
      maximumPivots<2) {
    // If dense then increase
    if (maximumPivots>100&&numberDense>1.5*maximumPivots) {
      factorization_->maximumPivots(numberDense);
      dualRowPivot_->maximumPivotsChanged();
      primalColumnPivot_->maximumPivotsChanged();
      // and redo arrays
      for (int iRow=0;iRow<4;iRow++) {
	int length =rowArray_[iRow]->capacity()+numberDense-maximumPivots;
	rowArray_[iRow]->reserve(length);
      }
    }
    return 1;
  } else if (factorization_->timeToRefactorize()&&!dontInvert) {
    //printf("ret after %d pivots\n",factorization_->pivots());
    return 1;
  } else if (forceFactorization_>0&&
	     factorization_->pivots()==forceFactorization_) {
    // relax
    forceFactorization_ = (3+5*forceFactorization_)/4;
    if (forceFactorization_>factorization_->maximumPivots())
      forceFactorization_ = -1; //off
    return 1;
  } else if (numberIterations_>1000+10*(numberRows_+(numberColumns_>>2))) {
    double random = randomNumberGenerator_.randomDouble();
    int maxNumber = (forceFactorization_<0) ? maximumPivots : CoinMin(forceFactorization_,maximumPivots);
    if (factorization_->pivots()>=random*maxNumber) {
      return 1;
    } else if (numberIterations_>1000000+10*(numberRows_+(numberColumns_>>2))&&
	       numberIterations_<1001000+10*(numberRows_+(numberColumns_>>2))) {
      return 1;
    } else {
      // carry on iterating
      return 0;
    }
  } else {
    // carry on iterating
    return 0;
  }
}
// Copy constructor. 
ClpSimplex::ClpSimplex(const ClpSimplex &rhs,int scalingMode) :
  ClpModel(rhs,scalingMode),
  bestPossibleImprovement_(0.0),
  zeroTolerance_(1.0e-13),
  columnPrimalSequence_(-2),
  rowPrimalSequence_(-2), 
  bestObjectiveValue_(rhs.bestObjectiveValue_),
  moreSpecialOptions_(2),
  baseIteration_(0),
  primalToleranceToGetOptimal_(-1.0),
  largeValue_(1.0e15),
  largestPrimalError_(0.0),
  largestDualError_(0.0),
  alphaAccuracy_(-1.0),
  dualBound_(1.0e10),
  alpha_(0.0),
  theta_(0.0),
  lowerIn_(0.0),
  valueIn_(0.0),
  upperIn_(-COIN_DBL_MAX),
  dualIn_(0.0),
  lowerOut_(-1),
  valueOut_(-1),
  upperOut_(-1),
  dualOut_(-1),
  dualTolerance_(1.0e-7),
  primalTolerance_(1.0e-7),
  sumDualInfeasibilities_(0.0),
  sumPrimalInfeasibilities_(0.0),
  infeasibilityCost_(1.0e10),
  sumOfRelaxedDualInfeasibilities_(0.0),
  sumOfRelaxedPrimalInfeasibilities_(0.0),
  acceptablePivot_(1.0e-8),
  lower_(NULL),
  rowLowerWork_(NULL),
  columnLowerWork_(NULL),
  upper_(NULL),
  rowUpperWork_(NULL),
  columnUpperWork_(NULL),
  cost_(NULL),
  rowObjectiveWork_(NULL),
  objectiveWork_(NULL),
  sequenceIn_(-1),
  directionIn_(-1),
  sequenceOut_(-1),
  directionOut_(-1),
  pivotRow_(-1),
  lastGoodIteration_(-100),
  dj_(NULL),
  rowReducedCost_(NULL),
  reducedCostWork_(NULL),
  solution_(NULL),
  rowActivityWork_(NULL),
  columnActivityWork_(NULL),
  numberDualInfeasibilities_(0),
  numberDualInfeasibilitiesWithoutFree_(0),
  numberPrimalInfeasibilities_(100),
  numberRefinements_(0),
  pivotVariable_(NULL),
  factorization_(NULL),
  savedSolution_(NULL),
  numberTimesOptimal_(0),
  disasterArea_(NULL),
  changeMade_(1),
  algorithm_(0),
  forceFactorization_(-1),
  perturbation_(100),
  nonLinearCost_(NULL),
  lastBadIteration_(-999999),
  lastFlaggedIteration_(-999999),
  numberFake_(0),
  numberChanged_(0),
  progressFlag_(0),
  firstFree_(-1),
  numberExtraRows_(0),
  maximumBasic_(0),
  dontFactorizePivots_(0),
  incomingInfeasibility_(1.0),
  allowedInfeasibility_(10.0),
  automaticScale_(0),
  maximumPerturbationSize_(0),
  perturbationArray_(NULL),
  baseModel_(NULL)
{ 
  int i;
  for (i=0;i<6;i++) {
    rowArray_[i]=NULL;
    columnArray_[i]=NULL;
  }
  for (i=0;i<4;i++) {
    spareIntArray_[i]=0;
    spareDoubleArray_[i]=0.0;
  }
  saveStatus_=NULL;
  factorization_ = NULL;
  dualRowPivot_ = NULL;
  primalColumnPivot_ = NULL;
  gutsOfDelete(0);
  delete nonLinearCost_;
  nonLinearCost_ = NULL;
  gutsOfCopy(rhs);
  solveType_=1; // say simplex based life form
}
// Copy constructor from model
ClpSimplex::ClpSimplex(const ClpModel &rhs, int scalingMode) :
  ClpModel(rhs,scalingMode),
  bestPossibleImprovement_(0.0),
  zeroTolerance_(1.0e-13),
  columnPrimalSequence_(-2),
  rowPrimalSequence_(-2), 
  bestObjectiveValue_(-COIN_DBL_MAX),
  moreSpecialOptions_(2),
  baseIteration_(0),
  primalToleranceToGetOptimal_(-1.0),
  largeValue_(1.0e15),
  largestPrimalError_(0.0),
  largestDualError_(0.0),
  alphaAccuracy_(-1.0),
  dualBound_(1.0e10),
  alpha_(0.0),
  theta_(0.0),
  lowerIn_(0.0),
  valueIn_(0.0),
  upperIn_(-COIN_DBL_MAX),
  dualIn_(0.0),
  lowerOut_(-1),
  valueOut_(-1),
  upperOut_(-1),
  dualOut_(-1),
  dualTolerance_(1.0e-7),
  primalTolerance_(1.0e-7),
  sumDualInfeasibilities_(0.0),
  sumPrimalInfeasibilities_(0.0),
  infeasibilityCost_(1.0e10),
  sumOfRelaxedDualInfeasibilities_(0.0),
  sumOfRelaxedPrimalInfeasibilities_(0.0),
  acceptablePivot_(1.0e-8),
  lower_(NULL),
  rowLowerWork_(NULL),
  columnLowerWork_(NULL),
  upper_(NULL),
  rowUpperWork_(NULL),
  columnUpperWork_(NULL),
  cost_(NULL),
  rowObjectiveWork_(NULL),
  objectiveWork_(NULL),
  sequenceIn_(-1),
  directionIn_(-1),
  sequenceOut_(-1),
  directionOut_(-1),
  pivotRow_(-1),
  lastGoodIteration_(-100),
  dj_(NULL),
  rowReducedCost_(NULL),
  reducedCostWork_(NULL),
  solution_(NULL),
  rowActivityWork_(NULL),
  columnActivityWork_(NULL),
  numberDualInfeasibilities_(0),
  numberDualInfeasibilitiesWithoutFree_(0),
  numberPrimalInfeasibilities_(100),
  numberRefinements_(0),
  pivotVariable_(NULL),
  factorization_(NULL),
  savedSolution_(NULL),
  numberTimesOptimal_(0),
  disasterArea_(NULL),
  changeMade_(1),
  algorithm_(0),
  forceFactorization_(-1),
  perturbation_(100),
  nonLinearCost_(NULL),
  lastBadIteration_(-999999),
  lastFlaggedIteration_(-999999),
  numberFake_(0),
  numberChanged_(0),
  progressFlag_(0),
  firstFree_(-1),
  numberExtraRows_(0),
  maximumBasic_(0),
  dontFactorizePivots_(0),
  incomingInfeasibility_(1.0),
  allowedInfeasibility_(10.0),
  automaticScale_(0),
  maximumPerturbationSize_(0),
  perturbationArray_(NULL),
  baseModel_(NULL)
{
  int i;
  for (i=0;i<6;i++) {
    rowArray_[i]=NULL;
    columnArray_[i]=NULL;
  }
  for (i=0;i<4;i++) {
    spareIntArray_[i]=0;
    spareDoubleArray_[i]=0.0;
  }
  saveStatus_=NULL;
  // get an empty factorization so we can set tolerances etc
  getEmptyFactorization();
  // say Steepest pricing
  dualRowPivot_ = new ClpDualRowSteepest();
  // say Steepest pricing
  primalColumnPivot_ = new ClpPrimalColumnSteepest();
  solveType_=1; // say simplex based life form
  
}
// Assignment operator. This copies the data
ClpSimplex & 
ClpSimplex::operator=(const ClpSimplex & rhs)
{
  if (this != &rhs) {
    gutsOfDelete(0);
    delete nonLinearCost_;
    nonLinearCost_ = NULL;
    ClpModel::operator=(rhs);
    gutsOfCopy(rhs);
  }
  return *this;
}
void 
ClpSimplex::gutsOfCopy(const ClpSimplex & rhs)
{
  assert (numberRows_==rhs.numberRows_);
  assert (numberColumns_==rhs.numberColumns_);
  numberExtraRows_ = rhs.numberExtraRows_;
  maximumBasic_ = rhs.maximumBasic_;
  dontFactorizePivots_ = rhs.dontFactorizePivots_;
  int numberRows2 = numberRows_+numberExtraRows_;
  moreSpecialOptions_ = rhs.moreSpecialOptions_;
  if ((whatsChanged_&1)!=0) {
    int numberTotal = numberColumns_+numberRows2;
    if ((specialOptions_&65536)!=0&&maximumRows_>=0) {
      assert (maximumInternalRows_>=numberRows2);
      assert (maximumInternalColumns_>=numberColumns_);
      numberTotal = 2*(maximumInternalColumns_+ maximumInternalRows_);
    }
    lower_ = ClpCopyOfArray(rhs.lower_,numberTotal);
    rowLowerWork_ = lower_+numberColumns_;
    columnLowerWork_ = lower_;
    upper_ = ClpCopyOfArray(rhs.upper_,numberTotal);
    rowUpperWork_ = upper_+numberColumns_;
    columnUpperWork_ = upper_;
    cost_ = ClpCopyOfArray(rhs.cost_,numberTotal);
    objectiveWork_ = cost_;
    rowObjectiveWork_ = cost_+numberColumns_;
    dj_ = ClpCopyOfArray(rhs.dj_,numberTotal);
    if (dj_) {
      reducedCostWork_ = dj_;
      rowReducedCost_ = dj_+numberColumns_;
    }
    solution_ = ClpCopyOfArray(rhs.solution_,numberTotal);
    if (solution_) {
      columnActivityWork_ = solution_;
      rowActivityWork_ = solution_+numberColumns_;
    }
    if (rhs.pivotVariable_) {
      pivotVariable_ = new int[numberRows2];
      CoinMemcpyN ( rhs.pivotVariable_, numberRows2 , pivotVariable_);
    } else {
      pivotVariable_=NULL;
    }
    savedSolution_ = ClpCopyOfArray(rhs.savedSolution_,numberTotal);
    int i;
    for (i=0;i<6;i++) {
      rowArray_[i]=NULL;
      if (rhs.rowArray_[i]) 
        rowArray_[i] = new CoinIndexedVector(*rhs.rowArray_[i]);
      columnArray_[i]=NULL;
      if (rhs.columnArray_[i]) 
        columnArray_[i] = new CoinIndexedVector(*rhs.columnArray_[i]);
    }
    if (rhs.saveStatus_) {
      saveStatus_ = ClpCopyOfArray( rhs.saveStatus_,numberTotal);
    }
  } else {
    lower_ = NULL;
    rowLowerWork_ = NULL;
    columnLowerWork_ = NULL; 
    upper_ = NULL; 
    rowUpperWork_ = NULL; 
    columnUpperWork_ = NULL;
    cost_ = NULL; 
    objectiveWork_ = NULL; 
    rowObjectiveWork_ = NULL; 
    dj_ = NULL; 
    reducedCostWork_ = NULL;
    rowReducedCost_ = NULL;
    solution_ = NULL; 
    columnActivityWork_ = NULL; 
    rowActivityWork_ = NULL; 
    pivotVariable_=NULL;
    savedSolution_ = NULL;
    int i;
    for (i=0;i<6;i++) {
      rowArray_[i]=NULL;
      columnArray_[i]=NULL;
    }
    saveStatus_ = NULL;
  }
  if (rhs.factorization_) {
    setFactorization(*rhs.factorization_);
  } else {
    delete factorization_;
    factorization_=NULL;
  }
  bestPossibleImprovement_ = rhs.bestPossibleImprovement_;
  columnPrimalSequence_ = rhs.columnPrimalSequence_;
  zeroTolerance_ = rhs.zeroTolerance_;
  rowPrimalSequence_ = rhs.rowPrimalSequence_;
  bestObjectiveValue_ = rhs.bestObjectiveValue_;
  baseIteration_ = rhs.baseIteration_;
  primalToleranceToGetOptimal_ = rhs.primalToleranceToGetOptimal_;
  largeValue_ = rhs.largeValue_;
  largestPrimalError_ = rhs.largestPrimalError_;
  largestDualError_ = rhs.largestDualError_;
  alphaAccuracy_ = rhs.alphaAccuracy_;
  dualBound_ = rhs.dualBound_;
  alpha_ = rhs.alpha_;
  theta_ = rhs.theta_;
  lowerIn_ = rhs.lowerIn_;
  valueIn_ = rhs.valueIn_;
  upperIn_ = rhs.upperIn_;
  dualIn_ = rhs.dualIn_;
  sequenceIn_ = rhs.sequenceIn_;
  directionIn_ = rhs.directionIn_;
  lowerOut_ = rhs.lowerOut_;
  valueOut_ = rhs.valueOut_;
  upperOut_ = rhs.upperOut_;
  dualOut_ = rhs.dualOut_;
  sequenceOut_ = rhs.sequenceOut_;
  directionOut_ = rhs.directionOut_;
  pivotRow_ = rhs.pivotRow_;
  lastGoodIteration_ = rhs.lastGoodIteration_;
  numberRefinements_ = rhs.numberRefinements_;
  dualTolerance_ = rhs.dualTolerance_;
  primalTolerance_ = rhs.primalTolerance_;
  sumDualInfeasibilities_ = rhs.sumDualInfeasibilities_;
  numberDualInfeasibilities_ = rhs.numberDualInfeasibilities_;
  numberDualInfeasibilitiesWithoutFree_ = 
    rhs.numberDualInfeasibilitiesWithoutFree_;
  sumPrimalInfeasibilities_ = rhs.sumPrimalInfeasibilities_;
  numberPrimalInfeasibilities_ = rhs.numberPrimalInfeasibilities_;
  dualRowPivot_ = rhs.dualRowPivot_->clone(true);
  dualRowPivot_->setModel(this);
  primalColumnPivot_ = rhs.primalColumnPivot_->clone(true);
  primalColumnPivot_->setModel(this);
  numberTimesOptimal_ = rhs.numberTimesOptimal_;
  disasterArea_ = NULL;
  changeMade_ = rhs.changeMade_;
  algorithm_ = rhs.algorithm_;
  forceFactorization_ = rhs.forceFactorization_;
  perturbation_ = rhs.perturbation_;
  infeasibilityCost_ = rhs.infeasibilityCost_;
  lastBadIteration_ = rhs.lastBadIteration_;
  lastFlaggedIteration_ = rhs.lastFlaggedIteration_;
  numberFake_ = rhs.numberFake_;
  numberChanged_ = rhs.numberChanged_;
  progressFlag_ = rhs.progressFlag_;
  firstFree_ = rhs.firstFree_;
  incomingInfeasibility_ = rhs.incomingInfeasibility_;
  allowedInfeasibility_ = rhs.allowedInfeasibility_;
  automaticScale_ = rhs.automaticScale_;
  maximumPerturbationSize_ = rhs.maximumPerturbationSize_;
  if (maximumPerturbationSize_&&maximumPerturbationSize_>=2*numberColumns_) {
    perturbationArray_ = CoinCopyOfArray(rhs.perturbationArray_,
					 maximumPerturbationSize_);
  } else {
    maximumPerturbationSize_ = 0;
    perturbationArray_ = NULL;
  }
  if (rhs.baseModel_) {
    baseModel_ = new ClpSimplex(*rhs.baseModel_);
  } else {
    baseModel_ = NULL;
  }
  progress_=rhs.progress_;
  for (int i=0;i<4;i++) {
    spareIntArray_[i]=rhs.spareIntArray_[i];
    spareDoubleArray_[i]=rhs.spareDoubleArray_[i];
  }
  sumOfRelaxedDualInfeasibilities_ = rhs.sumOfRelaxedDualInfeasibilities_;
  sumOfRelaxedPrimalInfeasibilities_ = rhs.sumOfRelaxedPrimalInfeasibilities_;
  acceptablePivot_ = rhs.acceptablePivot_;
  if (rhs.nonLinearCost_!=NULL)
    nonLinearCost_ = new ClpNonLinearCost(*rhs.nonLinearCost_);
  else
    nonLinearCost_=NULL;
  solveType_=rhs.solveType_;
}
// type == 0 do everything, most + pivot data, 2 factorization data as well
void 
ClpSimplex::gutsOfDelete(int type)
{
  if (!type||(specialOptions_&65536)==0) {
    maximumInternalColumns_ = -1;
    maximumInternalRows_ = -1;
    delete [] lower_;
    lower_=NULL;
    rowLowerWork_=NULL;
    columnLowerWork_=NULL;
    delete [] upper_;
    upper_=NULL;
    rowUpperWork_=NULL;
    columnUpperWork_=NULL;
    delete [] cost_;
    cost_=NULL;
    objectiveWork_=NULL;
    rowObjectiveWork_=NULL;
    delete [] dj_;
    dj_=NULL;
    reducedCostWork_=NULL;
    rowReducedCost_=NULL;
    delete [] solution_;
    solution_=NULL;
    rowActivityWork_=NULL;
    columnActivityWork_=NULL;
    delete [] savedSolution_;
    savedSolution_ = NULL;
  }
  if ((specialOptions_&2)==0) {
    delete nonLinearCost_;
    nonLinearCost_ = NULL;
  }
  int i;
  if ((specialOptions_&65536)==0) {
    for (i=0;i<6;i++) {
      delete rowArray_[i];
      rowArray_[i]=NULL;
      delete columnArray_[i];
      columnArray_[i]=NULL;
    }
  }
  delete [] saveStatus_;
  saveStatus_=NULL;
  if (type!=1) {
    delete rowCopy_;
    rowCopy_=NULL;
  }
  if (!type) {
    // delete everything
    setEmptyFactorization();
    delete [] pivotVariable_;
    pivotVariable_=NULL;
    delete dualRowPivot_;
    dualRowPivot_ = NULL;
    delete primalColumnPivot_;
    primalColumnPivot_ = NULL;
    delete baseModel_;
    baseModel_=NULL;
    delete [] perturbationArray_;
    perturbationArray_ = NULL;
    maximumPerturbationSize_ = 0;
  } else {
    // delete any size information in methods
    if (type>1) {
      //assert (factorization_);
      if (factorization_)
	factorization_->clearArrays();
      delete [] pivotVariable_;
      pivotVariable_=NULL;
    }
    dualRowPivot_->clearArrays();
    primalColumnPivot_->clearArrays();
  }
}
// This sets largest infeasibility and most infeasible
void 
ClpSimplex::checkPrimalSolution(const double * rowActivities,
					const double * columnActivities)
{
  double * solution;
  int iRow,iColumn;

  objectiveValue_ = 0.0;
  // now look at primal solution
  solution = rowActivityWork_;
  sumPrimalInfeasibilities_=0.0;
  numberPrimalInfeasibilities_=0;
  double primalTolerance = primalTolerance_;
  double relaxedTolerance=primalTolerance_;
  // we can't really trust infeasibilities if there is primal error
  double error = CoinMin(1.0e-2,largestPrimalError_);
  // allow tolerance at least slightly bigger than standard
  relaxedTolerance = relaxedTolerance +  error;
  sumOfRelaxedPrimalInfeasibilities_ = 0.0;
  for (iRow=0;iRow<numberRows_;iRow++) {
    //assert (fabs(solution[iRow])<1.0e15||getRowStatus(iRow) == basic);
    double infeasibility=0.0;
    objectiveValue_ += solution[iRow]*rowObjectiveWork_[iRow];
    if (solution[iRow]>rowUpperWork_[iRow]) {
      infeasibility=solution[iRow]-rowUpperWork_[iRow];
    } else if (solution[iRow]<rowLowerWork_[iRow]) {
      infeasibility=rowLowerWork_[iRow]-solution[iRow];
    }
    if (infeasibility>primalTolerance) {
      sumPrimalInfeasibilities_ += infeasibility-primalTolerance_;
      if (infeasibility>relaxedTolerance) 
	sumOfRelaxedPrimalInfeasibilities_ += infeasibility-relaxedTolerance;
      numberPrimalInfeasibilities_ ++;
    }
    infeasibility = fabs(rowActivities[iRow]-solution[iRow]);
  }
  // Check any infeasibilities from dynamic rows
  matrix_->primalExpanded(this,2);
  solution = columnActivityWork_;
  if (!matrix_->rhsOffset(this)) {
    for (iColumn=0;iColumn<numberColumns_;iColumn++) {
      //assert (fabs(solution[iColumn])<1.0e15||getColumnStatus(iColumn) == basic);
      double infeasibility=0.0;
      objectiveValue_ += objectiveWork_[iColumn]*solution[iColumn];
      if (solution[iColumn]>columnUpperWork_[iColumn]) {
	infeasibility=solution[iColumn]-columnUpperWork_[iColumn];
      } else if (solution[iColumn]<columnLowerWork_[iColumn]) {
	infeasibility=columnLowerWork_[iColumn]-solution[iColumn];
      }
      if (infeasibility>primalTolerance) {
	sumPrimalInfeasibilities_ += infeasibility-primalTolerance_;
	if (infeasibility>relaxedTolerance) 
	  sumOfRelaxedPrimalInfeasibilities_ += infeasibility-relaxedTolerance;
	numberPrimalInfeasibilities_ ++;
      }
      infeasibility = fabs(columnActivities[iColumn]-solution[iColumn]);
    }
  } else {
    // as we are using effective rhs we only check basics
    // But we do need to get objective
    objectiveValue_ += innerProduct(objectiveWork_,numberColumns_,solution);
    for (int j=0;j<numberRows_;j++) {
      int iColumn = pivotVariable_[j];
      //assert (fabs(solution[iColumn])<1.0e15||getColumnStatus(iColumn) == basic);
      double infeasibility=0.0;
      if (solution[iColumn]>columnUpperWork_[iColumn]) {
	infeasibility=solution[iColumn]-columnUpperWork_[iColumn];
      } else if (solution[iColumn]<columnLowerWork_[iColumn]) {
	infeasibility=columnLowerWork_[iColumn]-solution[iColumn];
      }
      if (infeasibility>primalTolerance) {
	sumPrimalInfeasibilities_ += infeasibility-primalTolerance_;
	if (infeasibility>relaxedTolerance) 
	  sumOfRelaxedPrimalInfeasibilities_ += infeasibility-relaxedTolerance;
	numberPrimalInfeasibilities_ ++;
      }
      infeasibility = fabs(columnActivities[iColumn]-solution[iColumn]);
    }
  }
  objectiveValue_ += objective_->nonlinearOffset();
  objectiveValue_ /= (objectiveScale_*rhsScale_);
}
void 
ClpSimplex::checkDualSolution()
{

  int iRow,iColumn;
  sumDualInfeasibilities_=0.0;
  numberDualInfeasibilities_=0;
  numberDualInfeasibilitiesWithoutFree_=0;
  if (matrix_->skipDualCheck()&&algorithm_>0&&problemStatus_==-2) {
    // pretend we found dual infeasibilities
    sumOfRelaxedDualInfeasibilities_ = 1.0;
    sumDualInfeasibilities_=1.0;
    numberDualInfeasibilities_=1;
    return;
  }
  int firstFreePrimal = -1;
  int firstFreeDual = -1;
  int numberSuperBasicWithDj=0;
  bestPossibleImprovement_=0.0;
  // we can't really trust infeasibilities if there is dual error
  double error = CoinMin(1.0e-2,largestDualError_);
  // allow tolerance at least slightly bigger than standard
  double relaxedTolerance = dualTolerance_ +  error;
  // allow bigger tolerance for possible improvement
  double possTolerance = 5.0*relaxedTolerance;
  sumOfRelaxedDualInfeasibilities_ = 0.0;

  // Check any djs from dynamic rows
  matrix_->dualExpanded(this,NULL,NULL,3);
  numberDualInfeasibilitiesWithoutFree_= numberDualInfeasibilities_;
  objectiveValue_ = 0.0;
  for (iColumn=0;iColumn<numberColumns_;iColumn++) {
    objectiveValue_ += objectiveWork_[iColumn]*columnActivityWork_[iColumn];
    if (getColumnStatus(iColumn) != basic&&!flagged(iColumn)) {
      // not basic
      double distanceUp = columnUpperWork_[iColumn]-
	columnActivityWork_[iColumn];
      double distanceDown = columnActivityWork_[iColumn] -
	columnLowerWork_[iColumn];
      if (distanceUp>primalTolerance_) {
	double value = reducedCostWork_[iColumn];
	// Check if "free"
	if (distanceDown>primalTolerance_) {
	  if (fabs(value)>1.0e2*relaxedTolerance) {
	    numberSuperBasicWithDj++;
	    if (firstFreeDual<0)
	      firstFreeDual = iColumn;
	  }
	  if (firstFreePrimal<0)
	    firstFreePrimal = iColumn;
	}
	// should not be negative
	if (value<0.0) {
	  value = - value;
	  if (value>dualTolerance_) {
	    if (getColumnStatus(iColumn) != isFree) {
	      numberDualInfeasibilitiesWithoutFree_ ++;
	      sumDualInfeasibilities_ += value-dualTolerance_;
	      if (value>possTolerance)
		bestPossibleImprovement_ += CoinMin(distanceUp,1.0e10)*value;
	      if (value>relaxedTolerance) 
		sumOfRelaxedDualInfeasibilities_ += value-relaxedTolerance;
	      numberDualInfeasibilities_ ++;
	    } else {
	      // free so relax a lot
	      value *= 0.01;
	      if (value>dualTolerance_) {
		sumDualInfeasibilities_ += value-dualTolerance_;
		if (value>possTolerance)
		  bestPossibleImprovement_=1.0e100;
		if (value>relaxedTolerance) 
		  sumOfRelaxedDualInfeasibilities_ += value-relaxedTolerance;
		numberDualInfeasibilities_ ++;
	      }
	    }
	  }
	}
      }
      if (distanceDown>primalTolerance_) {
	double value = reducedCostWork_[iColumn];
	// should not be positive
	if (value>0.0) {
	  if (value>dualTolerance_) {
	    sumDualInfeasibilities_ += value-dualTolerance_;
	    if (value>possTolerance)
	      bestPossibleImprovement_+= value*CoinMin(distanceDown,1.0e10);
	    if (value>relaxedTolerance) 
	      sumOfRelaxedDualInfeasibilities_ += value-relaxedTolerance;
	    numberDualInfeasibilities_ ++;
	    if (getColumnStatus(iColumn) != isFree) 
	      numberDualInfeasibilitiesWithoutFree_ ++;
	    // maybe we can make feasible by increasing tolerance
	  }
	}
      }
    }
  }
  for (iRow=0;iRow<numberRows_;iRow++) {
    objectiveValue_ += rowActivityWork_[iRow]*rowObjectiveWork_[iRow];
    if (getRowStatus(iRow) != basic&&!flagged(iRow+numberColumns_)) {
      // not basic
      double distanceUp = rowUpperWork_[iRow]-rowActivityWork_[iRow];
      double distanceDown = rowActivityWork_[iRow] -rowLowerWork_[iRow];
      if (distanceUp>primalTolerance_) {
	double value = rowReducedCost_[iRow];
	// Check if "free"
	if (distanceDown>primalTolerance_) {
	  if (fabs(value)>1.0e2*relaxedTolerance) {
	    numberSuperBasicWithDj++;
	    if (firstFreeDual<0)
	      firstFreeDual = iRow+numberColumns_;
	  }
	  if (firstFreePrimal<0)
	    firstFreePrimal = iRow+numberColumns_;
	}
	// should not be negative
	if (value<0.0) {
	  value = - value;
	  if (value>dualTolerance_) {
	    sumDualInfeasibilities_ += value-dualTolerance_;
	    if (value>possTolerance)
	      bestPossibleImprovement_+= value*CoinMin(distanceUp,1.0e10);
	    if (value>relaxedTolerance) 
	      sumOfRelaxedDualInfeasibilities_ += value-relaxedTolerance;
	    numberDualInfeasibilities_ ++;
	    if (getRowStatus(iRow) != isFree) 
	      numberDualInfeasibilitiesWithoutFree_ ++;
	  }
	}
      }
      if (distanceDown>primalTolerance_) {
	double value = rowReducedCost_[iRow];
	// should not be positive
	if (value>0.0) {
	  if (value>dualTolerance_) {
	    sumDualInfeasibilities_ += value-dualTolerance_;
	    if (value>possTolerance)
	      bestPossibleImprovement_+= value*CoinMin(distanceDown,1.0e10);
	    if (value>relaxedTolerance) 
	      sumOfRelaxedDualInfeasibilities_ += value-relaxedTolerance;
	    numberDualInfeasibilities_ ++;
	    if (getRowStatus(iRow) != isFree) 
	      numberDualInfeasibilitiesWithoutFree_ ++;
	    // maybe we can make feasible by increasing tolerance
	  }
	}
      }
    }
  }
  if (algorithm_<0&&firstFreeDual>=0) {
    // dual
    firstFree_ = firstFreeDual;
  } else if (numberSuperBasicWithDj||
	     (progress_.lastIterationNumber(0)<=0)) {
    firstFree_=firstFreePrimal;
  }
  objectiveValue_ += objective_->nonlinearOffset();
  objectiveValue_ /= (objectiveScale_*rhsScale_);
}
/* This sets sum and number of infeasibilities (Dual and Primal) */
void 
ClpSimplex::checkBothSolutions()
{
  if ((matrix_->skipDualCheck()&&algorithm_>0&&problemStatus_==-2)||
      matrix_->rhsOffset(this)) {
    // Say may be free or superbasic
    moreSpecialOptions_ &= ~8;
    // old way
    checkPrimalSolution(rowActivityWork_,columnActivityWork_);
    checkDualSolution();
    return;
  }
  int iSequence;
  assert (dualTolerance_>0.0&&dualTolerance_<1.0e10);
  assert (primalTolerance_>0.0&&primalTolerance_<1.0e10);
  objectiveValue_ = 0.0;
  sumPrimalInfeasibilities_=0.0;
  numberPrimalInfeasibilities_=0;
  double primalTolerance = primalTolerance_;
  double relaxedToleranceP=primalTolerance_;
  // we can't really trust infeasibilities if there is primal error
  double error = CoinMin(1.0e-2,largestPrimalError_);
  // allow tolerance at least slightly bigger than standard
  relaxedToleranceP = relaxedToleranceP +  error;
  sumOfRelaxedPrimalInfeasibilities_ = 0.0;
  sumDualInfeasibilities_=0.0;
  numberDualInfeasibilities_=0;
  double dualTolerance=dualTolerance_;
  double relaxedToleranceD=dualTolerance;
  // we can't really trust infeasibilities if there is dual error
  error = CoinMin(1.0e-2,largestDualError_);
  // allow tolerance at least slightly bigger than standard
  relaxedToleranceD = relaxedToleranceD +  error;
  // allow bigger tolerance for possible improvement
  double possTolerance = 5.0*relaxedToleranceD;
  sumOfRelaxedDualInfeasibilities_ = 0.0;
  bestPossibleImprovement_=0.0;

  // Check any infeasibilities from dynamic rows
  matrix_->primalExpanded(this,2);
  // Check any djs from dynamic rows
  matrix_->dualExpanded(this,NULL,NULL,3);
  int numberDualInfeasibilitiesFree= 0;
  int firstFreePrimal = -1;
  int firstFreeDual = -1;
  int numberSuperBasicWithDj=0;

  int numberTotal = numberRows_ + numberColumns_;
  // Say no free or superbasic
  moreSpecialOptions_ |= 8;
  for (iSequence=0;iSequence<numberTotal;iSequence++) {
    double value = solution_[iSequence];
#ifdef COIN_DEBUG
    if (fabs(value)>1.0e20)
      printf("%d values %g %g %g - status %d\n",iSequence,lower_[iSequence],
             solution_[iSequence],upper_[iSequence],status_[iSequence]);
#endif
    objectiveValue_ += value*cost_[iSequence];
    double distanceUp =upper_[iSequence]-value;
    double distanceDown =value-lower_[iSequence];
    if (distanceUp<-primalTolerance) {
      double infeasibility=-distanceUp;
      sumPrimalInfeasibilities_ += infeasibility-primalTolerance_;
      if (infeasibility>relaxedToleranceP) 
	sumOfRelaxedPrimalInfeasibilities_ += infeasibility-relaxedToleranceP;
      numberPrimalInfeasibilities_ ++;
    } else if (distanceDown<-primalTolerance) {
      double infeasibility=-distanceDown;
      sumPrimalInfeasibilities_ += infeasibility-primalTolerance_;
      if (infeasibility>relaxedToleranceP) 
	sumOfRelaxedPrimalInfeasibilities_ += infeasibility-relaxedToleranceP;
      numberPrimalInfeasibilities_ ++;
    } else {
      // feasible (so could be free)
      if (getStatus(iSequence) != basic&&!flagged(iSequence)) {
        // not basic
        double djValue = dj_[iSequence];
        if (distanceDown<primalTolerance) {
          if (distanceUp>primalTolerance&&djValue<-dualTolerance) {
	    sumDualInfeasibilities_ -= djValue+dualTolerance;
	    if (djValue<-possTolerance)
	      bestPossibleImprovement_ -= distanceUp*djValue;
	    if (djValue<-relaxedToleranceD) 
	      sumOfRelaxedDualInfeasibilities_ -= djValue+relaxedToleranceD;
	    numberDualInfeasibilities_ ++;
          } 
        } else if (distanceUp<primalTolerance) {
          if (djValue>dualTolerance) {
	    sumDualInfeasibilities_ += djValue-dualTolerance;
	    if (djValue>possTolerance)
	      bestPossibleImprovement_ += distanceDown*djValue;
	    if (djValue>relaxedToleranceD) 
	      sumOfRelaxedDualInfeasibilities_ += djValue-relaxedToleranceD;
	    numberDualInfeasibilities_ ++;
          }
        } else {
          // may be free
	  // Say free or superbasic
	  moreSpecialOptions_ &= ~8;
          djValue *= 0.01;
	  if (fabs(djValue)>dualTolerance) {
	    if (getStatus(iSequence) == isFree) 
              numberDualInfeasibilitiesFree++;
            sumDualInfeasibilities_ += fabs(djValue)-dualTolerance;
	    bestPossibleImprovement_=1.0e100;
            numberDualInfeasibilities_ ++;
            if (fabs(djValue)>relaxedToleranceD) {
              sumOfRelaxedDualInfeasibilities_ += value-relaxedToleranceD;
              numberSuperBasicWithDj++;
              if (firstFreeDual<0)
                firstFreeDual = iSequence;
            }
          }
	  if (firstFreePrimal<0)
	    firstFreePrimal = iSequence;
	}
      }
    }
  }
  objectiveValue_ += objective_->nonlinearOffset();
  objectiveValue_ /= (objectiveScale_*rhsScale_);
  numberDualInfeasibilitiesWithoutFree_= numberDualInfeasibilities_-
    numberDualInfeasibilitiesFree;
  if (algorithm_<0&&firstFreeDual>=0) {
    // dual
    firstFree_ = firstFreeDual;
  } else if (numberSuperBasicWithDj||
	     (progress_.lastIterationNumber(0)<=0)) {
    firstFree_=firstFreePrimal;
  }
}
/* Adds multiple of a column into an array */
void 
ClpSimplex::add(double * array,
		int sequence, double multiplier) const
{
  if (sequence>=numberColumns_&&sequence<numberColumns_+numberRows_) {
    //slack
    array [sequence-numberColumns_] -= multiplier;
  } else {
    // column
    matrix_->add(this,array,sequence,multiplier);
  }
}
/*
  Unpacks one column of the matrix into indexed array 
*/
void 
ClpSimplex::unpack(CoinIndexedVector * rowArray) const
{
  rowArray->clear();
  if (sequenceIn_>=numberColumns_&&sequenceIn_<numberColumns_+numberRows_) {
    //slack
    rowArray->insert(sequenceIn_-numberColumns_,-1.0);
  } else {
    // column
    matrix_->unpack(this,rowArray,sequenceIn_);
  }
}
void 
ClpSimplex::unpack(CoinIndexedVector * rowArray,int sequence) const
{
  rowArray->clear();
  if (sequence>=numberColumns_&&sequence<numberColumns_+numberRows_) {
    //slack
    rowArray->insert(sequence-numberColumns_,-1.0);
  } else {
    // column
    matrix_->unpack(this,rowArray,sequence);
  }
}
/*
  Unpacks one column of the matrix into indexed array 
*/
void 
ClpSimplex::unpackPacked(CoinIndexedVector * rowArray) 
{
  rowArray->clear();
  if (sequenceIn_>=numberColumns_&&sequenceIn_<numberColumns_+numberRows_) {
    //slack
    int * index = rowArray->getIndices();
    double * array = rowArray->denseVector();
    array[0]=-1.0;
    index[0]=sequenceIn_-numberColumns_;
    rowArray->setNumElements(1);
    rowArray->setPackedMode(true);
  } else {
    // column
    matrix_->unpackPacked(this,rowArray,sequenceIn_);
  }
}
void 
ClpSimplex::unpackPacked(CoinIndexedVector * rowArray,int sequence)
{
  rowArray->clear();
  if (sequence>=numberColumns_&&sequence<numberColumns_+numberRows_) {
    //slack
    int * index = rowArray->getIndices();
    double * array = rowArray->denseVector();
    array[0]=-1.0;
    index[0]=sequence-numberColumns_;
    rowArray->setNumElements(1);
    rowArray->setPackedMode(true);
  } else {
    // column
    matrix_->unpackPacked(this,rowArray,sequence);
  }
}
//static int x_gaps[4]={0,0,0,0};
//static int scale_times[]={0,0,0,0};
bool
ClpSimplex::createRim(int what,bool makeRowCopy, int startFinishOptions)
{
  bool goodMatrix=true;
  int saveLevel=handler_->logLevel();
  spareIntArray_[0]=0;
  if (!matrix_->canGetRowCopy())
    makeRowCopy=false; // switch off row copy if can't produce
  // Arrays will be there and correct size unless what is 63
  bool newArrays = (what==63);
  // We may be restarting with same size
  bool keepPivots=false;
  if (startFinishOptions==-1) {
    startFinishOptions=0;
    keepPivots=true;
  }
  bool oldMatrix = ((startFinishOptions&4)!=0&&(whatsChanged_&1)!=0);
  if (what==63) {
    pivotRow_=-1; 
    if (!status_)
      createStatus();
    if (oldMatrix)
      newArrays=false;
    if (problemStatus_==10) {
      handler_->setLogLevel(0); // switch off messages
      if (rowArray_[0]) {
        // stuff is still there
        oldMatrix=true;
        newArrays=false;
        keepPivots=true;
	for (int iRow=0;iRow<4;iRow++) {
	  rowArray_[iRow]->clear();
	}
	for (int iColumn=0;iColumn<2;iColumn++) {
	  columnArray_[iColumn]->clear();
	}
      }
    } else if (factorization_) {
      // match up factorization messages
      if (handler_->logLevel()<3)
        factorization_->messageLevel(0);
      else
        factorization_->messageLevel(CoinMax(3,factorization_->messageLevel()));
      /* Faster to keep pivots rather than re-scan matrix.  Matrix may have changed
         i.e. oldMatrix false but okay as long as same number rows and status array exists
      */
      if ((startFinishOptions&2)!=0&&factorization_->numberRows()==numberRows_&&status_)
        keepPivots=true;
    }
    numberExtraRows_ = matrix_->generalExpanded(this,2,maximumBasic_);
    if (numberExtraRows_&&newArrays) {
      // make sure status array large enough
      assert (status_);
      int numberOld = numberRows_+numberColumns_;
      int numberNew = numberRows_+numberColumns_+numberExtraRows_;
      unsigned char * newStatus = new unsigned char [numberNew];
      memset(newStatus+numberOld,0,numberExtraRows_);
      CoinMemcpyN(status_,numberOld,newStatus);
      delete [] status_;
      status_=newStatus;
    }
  }
  int numberRows2 = numberRows_+numberExtraRows_;
  int numberTotal = numberRows2+numberColumns_;
  if ((specialOptions_&65536)!=0) {
    assert (!numberExtraRows_);
    if (!cost_||numberRows2>maximumInternalRows_||
	numberColumns_>maximumInternalColumns_) {
      newArrays=true;
      keepPivots=false;
      printf("createrim a %d rows, %d maximum rows %d maxinternal\n",
	     numberRows_,maximumRows_,maximumInternalRows_);
      int oldMaximumRows=maximumInternalRows_;
      int oldMaximumColumns=maximumInternalColumns_;
      if (cost_) {
	if (numberRows2>maximumInternalRows_) 
	  maximumInternalRows_ = numberRows2;
	if (numberColumns_>maximumInternalColumns_) 
	  maximumInternalColumns_ = numberColumns_;
      } else {
	maximumInternalRows_ = numberRows2;
	maximumInternalColumns_ = numberColumns_;
      }
      assert(maximumInternalRows_ == maximumRows_);
      assert(maximumInternalColumns_ == maximumColumns_);
      printf("createrim b %d rows, %d maximum rows, %d maxinternal\n",
	     numberRows_,maximumRows_,maximumInternalRows_);
      int numberTotal2 = (maximumInternalRows_+maximumInternalColumns_)*2;
      delete [] cost_;
      cost_ = new double[numberTotal2];
      delete [] lower_;
      delete [] upper_;
      lower_ = new double[numberTotal2];
      upper_ = new double[numberTotal2];
      delete [] dj_;
      dj_ = new double[numberTotal2];
      delete [] solution_;
      solution_ = new double[numberTotal2];
      // ***** should be non NULL but seems to be too much
      //printf("resize %d savedRowScale %x\n",maximumRows_,savedRowScale_);
      if (savedRowScale_) {
	assert (oldMaximumRows>0);
	double * temp;
	temp = new double [4*maximumRows_];
	CoinFillN(temp,4*maximumRows_,1.0);
	CoinMemcpyN(savedRowScale_,numberRows_,temp);
	CoinMemcpyN(savedRowScale_+oldMaximumRows,numberRows_,temp+maximumRows_);
	CoinMemcpyN(savedRowScale_+2*oldMaximumRows,numberRows_,temp+2*maximumRows_);
	CoinMemcpyN(savedRowScale_+3*oldMaximumRows,numberRows_,temp+3*maximumRows_);
	delete [] savedRowScale_;
	savedRowScale_ = temp;
	temp = new double [4*maximumColumns_];
	CoinFillN(temp,4*maximumColumns_,1.0);
	CoinMemcpyN(savedColumnScale_,numberColumns_,temp);
	CoinMemcpyN(savedColumnScale_+oldMaximumColumns,numberColumns_,temp+maximumColumns_);
	CoinMemcpyN(savedColumnScale_+2*oldMaximumColumns,numberColumns_,temp+2*maximumColumns_);
	CoinMemcpyN(savedColumnScale_+3*oldMaximumColumns,numberColumns_,temp+3*maximumColumns_);
	delete [] savedColumnScale_;
	savedColumnScale_ = temp;
      }
    }
  }
  int i;
  bool doSanityCheck=true;
  if (what==63) {
    // We may want to switch stuff off for speed
    if ((specialOptions_&256)!=0)
      makeRowCopy=false; // no row copy
    if ((specialOptions_&128)!=0)
      doSanityCheck=false; // no sanity check
    //check matrix
    if (!matrix_)
      matrix_=new ClpPackedMatrix();
    int checkType=(doSanityCheck) ? 15 : 14;
    if (oldMatrix)
      checkType = 14;
    bool inCbcOrOther = (specialOptions_&0x03000000)!=0;
    if (inCbcOrOther)
      checkType -= 4; // don't check for duplicates
    if (!matrix_->allElementsInRange(this,smallElement_,1.0e20,checkType)) {
      problemStatus_=4;
      secondaryStatus_=8;
      //goodMatrix= false;
      return false;
    }
    bool rowCopyIsScaled;
    if (makeRowCopy) {
      if(!oldMatrix||!rowCopy_) {
	delete rowCopy_;
	// may return NULL if can't give row copy
	rowCopy_ = matrix_->reverseOrderedCopy();
	rowCopyIsScaled=false;
      } else {
	rowCopyIsScaled=true;
      }
    }
#if 0
    if (what==63) {
      int k=rowScale_ ? 1 : 0;
      if (oldMatrix)
	k+=2;
      scale_times[k]++;
      if ((scale_times[0]+scale_times[1]+scale_times[2]+scale_times[3])%1000==0)
	printf("scale counts %d %d %d %d\n",
	       scale_times[0],scale_times[1],scale_times[2],scale_times[3]);
    }
#endif
    // do scaling if needed
    if (!oldMatrix&&scalingFlag_<0) {
      if (scalingFlag_<0&&rowScale_) {
        //if (handler_->logLevel()>0)
          printf("How did we get scalingFlag_ %d and non NULL rowScale_? - switching off scaling\n",
                 scalingFlag_);
        scalingFlag_=0;
      }
      delete [] rowScale_;
      delete [] columnScale_;
      rowScale_=NULL;
      columnScale_=NULL;
    }
    inverseRowScale_ = NULL;
    inverseColumnScale_ = NULL;
    if (scalingFlag_>0&&!rowScale_) {
      if ((specialOptions_&65536)!=0) {
	assert (!rowScale_);
	rowScale_ = savedRowScale_;
	columnScale_ = savedColumnScale_;
	// put back original
	if (savedRowScale_) {
	  inverseRowScale_ = savedRowScale_+maximumInternalRows_;
	  inverseColumnScale_ = savedColumnScale_+maximumInternalColumns_;
	  CoinMemcpyN(savedRowScale_+2*maximumInternalRows_,
		      numberRows2,savedRowScale_);
	  CoinMemcpyN(savedRowScale_+3*maximumInternalRows_,
		      numberRows2,inverseRowScale_);
	  CoinMemcpyN(savedColumnScale_+2*maximumColumns_,
		      numberColumns_,savedColumnScale_);
	  CoinMemcpyN(savedColumnScale_+3*maximumColumns_,
		      numberColumns_,inverseColumnScale_);
	}
      }
      if (matrix_->scale(this))
	scalingFlag_=-scalingFlag_; // not scaled after all
      if (rowScale_&&automaticScale_) {
	// try automatic scaling
	double smallestObj=1.0e100;
	double largestObj=0.0;
	double largestRhs=0.0;
        const double * obj = objective();
	for (i=0;i<numberColumns_;i++) {
	  double value = fabs(obj[i]);
          value *= columnScale_[i];
	  if (value&&columnLower_[i]!=columnUpper_[i]) {
	    smallestObj = CoinMin(smallestObj,value);
	    largestObj = CoinMax(largestObj,value);
	  }
	  if (columnLower_[i]>0.0||columnUpper_[i]<0.0) {
	    double scale = 1.0*inverseColumnScale_[i];
	    //printf("%d %g %g %g %g\n",i,scale,lower_[i],upper_[i],largestRhs);
	    if (columnLower_[i]>0)
	      largestRhs=CoinMax(largestRhs,columnLower_[i]*scale);
	    if (columnUpper_[i]<0.0)
	      largestRhs=CoinMax(largestRhs,-columnUpper_[i]*scale);
	  }
	}
	for (i=0;i<numberRows_;i++) {
	  if (rowLower_[i]>0.0||rowUpper_[i]<0.0) {
	    double scale = rowScale_[i];
	    //printf("%d %g %g %g %g\n",i,scale,lower_[i],upper_[i],largestRhs);
	    if (rowLower_[i]>0)
	      largestRhs=CoinMax(largestRhs,rowLower_[i]*scale);
	    if (rowUpper_[i]<0.0)
	      largestRhs=CoinMax(largestRhs,-rowUpper_[i]*scale);
	  }
	}
	printf("small obj %g, large %g - rhs %g\n",smallestObj,largestObj,largestRhs);
	bool scalingDone=false;
	// look at element range
	double smallestNegative;
	double largestNegative;
	double smallestPositive;
	double largestPositive;
	matrix_->rangeOfElements(smallestNegative, largestNegative,
				 smallestPositive, largestPositive);
	smallestPositive = CoinMin(fabs(smallestNegative),smallestPositive);
	largestPositive = CoinMax(fabs(largestNegative),largestPositive);
	if (largestObj) {
	  double ratio = largestObj/smallestObj;
	  double scale=1.0;
	  if (ratio<1.0e8) {
	    // reasonable
	    if (smallestObj<1.0e-4) {
	      // may as well scale up
	      scalingDone=true;
	      scale=1.0e-3/smallestObj;
	    } else if (largestObj<1.0e6||(algorithm_>0&&largestObj<1.0e-4*infeasibilityCost_)) {
	      //done=true;
	    } else {
	      scalingDone=true;
	      if (algorithm_<0) {
		scale = 1.0e6/largestObj;
	      } else {
		scale = CoinMax(1.0e6,1.0e-4*infeasibilityCost_)/largestObj;
	      }
	    }
	  } else if (ratio<1.0e12) {
	    // not so good
	    if (smallestObj<1.0e-7) {
	      // may as well scale up
	      scalingDone=true;
	      scale=1.0e-6/smallestObj;
	    } else if (largestObj<1.0e7||(algorithm_>0&&largestObj<1.0e-3*infeasibilityCost_)) {
	      //done=true;
	    } else {
	      scalingDone=true;
	      if (algorithm_<0) {
		scale = 1.0e7/largestObj;
	      } else {
		scale = CoinMax(1.0e7,1.0e-3*infeasibilityCost_)/largestObj;
	      }
	    }
	  } else {
	    // Really nasty problem
	    if (smallestObj<1.0e-8) {
	      // may as well scale up
	      scalingDone=true;
	      scale=1.0e-7/smallestObj;
	      largestObj *= scale;
	    } 
	    if (largestObj<1.0e7||(algorithm_>0&&largestObj<1.0e-3*infeasibilityCost_)) {
	      //done=true;
	    } else {
	      scalingDone=true;
	      if (algorithm_<0) {
		scale = 1.0e7/largestObj;
	      } else {
		scale = CoinMax(1.0e7,1.0e-3*infeasibilityCost_)/largestObj;
	      }
	    }
	  }
	  objectiveScale_=scale;
	}
	if (largestRhs>1.0e12) {
	  scalingDone=true;
	  rhsScale_=1.0e9/largestRhs;
	} else if (largestPositive>1.0e-14*smallestPositive&&largestRhs>1.0e6) {
	  scalingDone=true;
	  rhsScale_=1.0e6/largestRhs;
	} else {
	  rhsScale_=1.0;
	}
	if (scalingDone) {
	  handler_->message(CLP_RIM_SCALE,messages_)
	    <<objectiveScale_<<rhsScale_
	    <<CoinMessageEol;
	}
      }
    } else if (makeRowCopy&&scalingFlag_>0&&!rowCopyIsScaled) {
      matrix_->scaleRowCopy(this);
    }
    if (rowScale_&&!savedRowScale_) {
      inverseRowScale_ = rowScale_+numberRows2;
      inverseColumnScale_ = columnScale_+numberColumns_;
    }
    // See if we can try for faster row copy
    if (makeRowCopy&&!oldMatrix) {
      ClpPackedMatrix* clpMatrix =
        dynamic_cast< ClpPackedMatrix*>(matrix_);
      if (clpMatrix&&numberThreads_) 
        clpMatrix->specialRowCopy(this,rowCopy_);
      if (clpMatrix)
	clpMatrix->specialColumnCopy(this);
    }
  }
  if (what==63) {
#if 0
    {
      x_gaps[0]++;
      ClpPackedMatrix* clpMatrix =
	dynamic_cast< ClpPackedMatrix*>(matrix_);
      if (clpMatrix) {
	if (!clpMatrix->getPackedMatrix()->hasGaps())
	  x_gaps[1]++;
	if ((clpMatrix->flags()&2)==0)
	  x_gaps[3]++;
      } else {
	x_gaps[2]++;
      }
      if ((x_gaps[0]%1000)==0)
	printf("create %d times, no gaps %d times - not clp %d times - flagged %d\n",
	       x_gaps[0],x_gaps[1],x_gaps[2],x_gaps[3]);
    }
#endif
    if (newArrays&&(specialOptions_&65536)==0) {
      delete [] cost_;
      cost_ = new double[2*numberTotal];
      delete [] lower_;
      delete [] upper_;
      lower_ = new double[numberTotal];
      upper_ = new double[numberTotal];
      delete [] dj_;
      dj_ = new double[numberTotal];
      delete [] solution_;
      solution_ = new double[numberTotal];
    }
    reducedCostWork_ = dj_;
    rowReducedCost_ = dj_+numberColumns_;
    columnActivityWork_ = solution_;
    rowActivityWork_ = solution_+numberColumns_;
    objectiveWork_ = cost_;
    rowObjectiveWork_ = cost_+numberColumns_;
    rowLowerWork_ = lower_+numberColumns_;
    columnLowerWork_ = lower_;
    rowUpperWork_ = upper_+numberColumns_;
    columnUpperWork_ = upper_;
  }
  if ((what&4)!=0) {
    double direction = optimizationDirection_*objectiveScale_;
    const double * obj = objective();
    const double * rowScale = rowScale_;
    const double * columnScale = columnScale_;
    // and also scale by scale factors
    if (rowScale) {
      if (rowObjective_) {
	for (i=0;i<numberRows_;i++)
	  rowObjectiveWork_[i] = rowObjective_[i]*direction/rowScale[i];
      } else {
	memset(rowObjectiveWork_,0,numberRows_*sizeof(double));
      }
      // If scaled then do all columns later in one loop 
      if (what!=63) {
	for (i=0;i<numberColumns_;i++) {
	  CoinAssert(fabs(obj[i])<1.0e25);
	  objectiveWork_[i] = obj[i]*direction*columnScale[i];
	}
      }
    } else {
      if (rowObjective_) {
	for (i=0;i<numberRows_;i++)
	  rowObjectiveWork_[i] = rowObjective_[i]*direction;
      } else {
	memset(rowObjectiveWork_,0,numberRows_*sizeof(double));
      }
      for (i=0;i<numberColumns_;i++) {
	CoinAssert(fabs(obj[i])<1.0e25);
	objectiveWork_[i] = obj[i]*direction;
      }
    }
  }
  if ((what&1)!=0) {
    const double * rowScale = rowScale_;
    // clean up any mismatches on infinity
    // and fix any variables with tiny gaps
    double primalTolerance=dblParam_[ClpPrimalTolerance];
    if(rowScale) {
      // If scaled then do all columns later in one loop 
      if (what!=63) {
	const double * inverseScale = inverseColumnScale_;
	for (i=0;i<numberColumns_;i++) {
	  double multiplier = rhsScale_*inverseScale[i];
	  double lowerValue = columnLower_[i];
	  double upperValue = columnUpper_[i];
	  if (lowerValue>-1.0e20) {
	    columnLowerWork_[i]=lowerValue*multiplier;
	    if (upperValue>=1.0e20) {
	      columnUpperWork_[i]=COIN_DBL_MAX;
	    } else {
	      columnUpperWork_[i]=upperValue*multiplier;
	      if (fabs(columnUpperWork_[i]-columnLowerWork_[i])<=primalTolerance) {
		if (columnLowerWork_[i]>=0.0) {
		  columnUpperWork_[i] = columnLowerWork_[i];
		} else if (columnUpperWork_[i]<=0.0) {
		  columnLowerWork_[i] = columnUpperWork_[i];
		} else {
		  columnUpperWork_[i] = 0.0;
		  columnLowerWork_[i] = 0.0;
		}
	      }
	    }
	  } else if (upperValue<1.0e20) {
	    columnLowerWork_[i]=-COIN_DBL_MAX;
	    columnUpperWork_[i]=upperValue*multiplier;
	  } else {
	    // free
	    columnLowerWork_[i]=-COIN_DBL_MAX;
	    columnUpperWork_[i]=COIN_DBL_MAX;
	  }
	}
      }
      for (i=0;i<numberRows_;i++) {
	double multiplier = rhsScale_*rowScale[i];
	double lowerValue = rowLower_[i];
	double upperValue = rowUpper_[i];
	if (lowerValue>-1.0e20) {
	  rowLowerWork_[i]=lowerValue*multiplier;
	  if (upperValue>=1.0e20) {
	    rowUpperWork_[i]=COIN_DBL_MAX;
	  } else {
	    rowUpperWork_[i]=upperValue*multiplier;
	    if (fabs(rowUpperWork_[i]-rowLowerWork_[i])<=primalTolerance) {
	      if (rowLowerWork_[i]>=0.0) {
		rowUpperWork_[i] = rowLowerWork_[i];
	      } else if (rowUpperWork_[i]<=0.0) {
		rowLowerWork_[i] = rowUpperWork_[i];
	      } else {
		rowUpperWork_[i] = 0.0;
		rowLowerWork_[i] = 0.0;
	      }
	    }
	  }
	} else if (upperValue<1.0e20) {
	  rowLowerWork_[i]=-COIN_DBL_MAX;
	  rowUpperWork_[i]=upperValue*multiplier;
	} else {
	  // free
	  rowLowerWork_[i]=-COIN_DBL_MAX;
	  rowUpperWork_[i]=COIN_DBL_MAX;
	}
      }
    } else if (rhsScale_!=1.0) {
      for (i=0;i<numberColumns_;i++) {
	double lowerValue = columnLower_[i];
	double upperValue = columnUpper_[i];
	if (lowerValue>-1.0e20) {
	  columnLowerWork_[i]=lowerValue*rhsScale_;
	  if (upperValue>=1.0e20) {
	    columnUpperWork_[i]=COIN_DBL_MAX;
	  } else {
	    columnUpperWork_[i]=upperValue*rhsScale_;
	    if (fabs(columnUpperWork_[i]-columnLowerWork_[i])<=primalTolerance) {
	      if (columnLowerWork_[i]>=0.0) {
		columnUpperWork_[i] = columnLowerWork_[i];
	      } else if (columnUpperWork_[i]<=0.0) {
		columnLowerWork_[i] = columnUpperWork_[i];
	      } else {
		columnUpperWork_[i] = 0.0;
		columnLowerWork_[i] = 0.0;
	      }
	    }
	  }
	} else if (upperValue<1.0e20) {
	  columnLowerWork_[i]=-COIN_DBL_MAX;
	  columnUpperWork_[i]=upperValue*rhsScale_;
	} else {
	  // free
	  columnLowerWork_[i]=-COIN_DBL_MAX;
	  columnUpperWork_[i]=COIN_DBL_MAX;
	}
      }
      for (i=0;i<numberRows_;i++) {
	double lowerValue = rowLower_[i];
	double upperValue = rowUpper_[i];
	if (lowerValue>-1.0e20) {
	  rowLowerWork_[i]=lowerValue*rhsScale_;
	  if (upperValue>=1.0e20) {
	    rowUpperWork_[i]=COIN_DBL_MAX;
	  } else {
	    rowUpperWork_[i]=upperValue*rhsScale_;
	    if (fabs(rowUpperWork_[i]-rowLowerWork_[i])<=primalTolerance) {
	      if (rowLowerWork_[i]>=0.0) {
		rowUpperWork_[i] = rowLowerWork_[i];
	      } else if (rowUpperWork_[i]<=0.0) {
		rowLowerWork_[i] = rowUpperWork_[i];
	      } else {
		rowUpperWork_[i] = 0.0;
		rowLowerWork_[i] = 0.0;
	      }
	    }
	  }
	} else if (upperValue<1.0e20) {
	  rowLowerWork_[i]=-COIN_DBL_MAX;
	  rowUpperWork_[i]=upperValue*rhsScale_;
	} else {
	  // free
	  rowLowerWork_[i]=-COIN_DBL_MAX;
	  rowUpperWork_[i]=COIN_DBL_MAX;
	}
      }
    } else {
      for (i=0;i<numberColumns_;i++) {
	double lowerValue = columnLower_[i];
	double upperValue = columnUpper_[i];
	if (lowerValue>-1.0e20) {
	  columnLowerWork_[i]=lowerValue;
	  if (upperValue>=1.0e20) {
	    columnUpperWork_[i]=COIN_DBL_MAX;
	  } else {
	    columnUpperWork_[i]=upperValue;
	    if (fabs(columnUpperWork_[i]-columnLowerWork_[i])<=primalTolerance) {
	      if (columnLowerWork_[i]>=0.0) {
		columnUpperWork_[i] = columnLowerWork_[i];
	      } else if (columnUpperWork_[i]<=0.0) {
		columnLowerWork_[i] = columnUpperWork_[i];
	      } else {
		columnUpperWork_[i] = 0.0;
		columnLowerWork_[i] = 0.0;
	      }
	    }
	  }
	} else if (upperValue<1.0e20) {
	  columnLowerWork_[i]=-COIN_DBL_MAX;
	  columnUpperWork_[i]=upperValue;
	} else {
	  // free
	  columnLowerWork_[i]=-COIN_DBL_MAX;
	  columnUpperWork_[i]=COIN_DBL_MAX;
	}
      }
      for (i=0;i<numberRows_;i++) {
	double lowerValue = rowLower_[i];
	double upperValue = rowUpper_[i];
	if (lowerValue>-1.0e20) {
	  rowLowerWork_[i]=lowerValue;
	  if (upperValue>=1.0e20) {
	    rowUpperWork_[i]=COIN_DBL_MAX;
	  } else {
	    rowUpperWork_[i]=upperValue;
	    if (fabs(rowUpperWork_[i]-rowLowerWork_[i])<=primalTolerance) {
	      if (rowLowerWork_[i]>=0.0) {
		rowUpperWork_[i] = rowLowerWork_[i];
	      } else if (rowUpperWork_[i]<=0.0) {
		rowLowerWork_[i] = rowUpperWork_[i];
	      } else {
		rowUpperWork_[i] = 0.0;
		rowLowerWork_[i] = 0.0;
	      }
	    }
	  }
	} else if (upperValue<1.0e20) {
	  rowLowerWork_[i]=-COIN_DBL_MAX;
	  rowUpperWork_[i]=upperValue;
	} else {
	  // free
	  rowLowerWork_[i]=-COIN_DBL_MAX;
	  rowUpperWork_[i]=COIN_DBL_MAX;
	}
      }
    }
  }
  if (what==63) {
    // move information to work arrays
    double direction = optimizationDirection_;
    // direction is actually scale out not scale in
    if (direction)
      direction = 1.0/direction;
    if (direction!=1.0) {
      // reverse all dual signs
      for (i=0;i<numberColumns_;i++) 
        reducedCost_[i] *= direction;
      for (i=0;i<numberRows_;i++) 
        dual_[i] *= direction;
    }
    for (i=0;i<numberRows_+numberColumns_;i++) {
      setFakeBound(i,noFake);
    }
    if (rowScale_) {
      const double * obj = objective();
      double direction = optimizationDirection_*objectiveScale_;
      // clean up any mismatches on infinity
      // and fix any variables with tiny gaps
      double primalTolerance=dblParam_[ClpPrimalTolerance];
      // on entry
      const double * inverseScale = inverseColumnScale_;
      for (i=0;i<numberColumns_;i++) {
	CoinAssert(fabs(obj[i])<1.0e25);
	double scaleFactor = columnScale_[i];
	double multiplier = rhsScale_*inverseScale[i];
	scaleFactor *= direction;
	objectiveWork_[i] = obj[i]*scaleFactor;
	reducedCostWork_[i] = reducedCost_[i]*scaleFactor;
	double lowerValue = columnLower_[i];
	double upperValue = columnUpper_[i];
	if (lowerValue>-1.0e20) {
	  columnLowerWork_[i]=lowerValue*multiplier;
	  if (upperValue>=1.0e20) {
	    columnUpperWork_[i]=COIN_DBL_MAX;
	  } else {
	    columnUpperWork_[i]=upperValue*multiplier;
	    if (fabs(columnUpperWork_[i]-columnLowerWork_[i])<=primalTolerance) {
	      if (columnLowerWork_[i]>=0.0) {
		columnUpperWork_[i] = columnLowerWork_[i];
	      } else if (columnUpperWork_[i]<=0.0) {
		columnLowerWork_[i] = columnUpperWork_[i];
	      } else {
		columnUpperWork_[i] = 0.0;
		columnLowerWork_[i] = 0.0;
	      }
	    }
	  }
	} else if (upperValue<1.0e20) {
	  columnLowerWork_[i]=-COIN_DBL_MAX;
	  columnUpperWork_[i]=upperValue*multiplier;
	} else {
	  // free
	  columnLowerWork_[i]=-COIN_DBL_MAX;
	  columnUpperWork_[i]=COIN_DBL_MAX;
	}
	double value = columnActivity_[i] * multiplier;
	if (fabs(value)>1.0e20) {
	  //printf("bad value of %g for column %d\n",value,i);
	  setColumnStatus(i,superBasic);
	  if (columnUpperWork_[i]<0.0) {
	    value=columnUpperWork_[i];
	  } else if (columnLowerWork_[i]>0.0) {
	    value=columnLowerWork_[i];
	  } else {
	    value=0.0;
	  }
	}
	columnActivityWork_[i] = value;
      }
      inverseScale = inverseRowScale_;
      for (i=0;i<numberRows_;i++) {
	dual_[i] *= inverseScale[i];
	dual_[i] *= objectiveScale_;
	rowReducedCost_[i] = dual_[i];
	double multiplier = rhsScale_*rowScale_[i];
	double value = rowActivity_[i] * multiplier;
	if (fabs(value)>1.0e20) {
	  //printf("bad value of %g for row %d\n",value,i);
	  setRowStatus(i,superBasic);
	  if (rowUpperWork_[i]<0.0) {
	    value=rowUpperWork_[i];
	  } else if (rowLowerWork_[i]>0.0) {
	    value=rowLowerWork_[i];
	  } else {
	    value=0.0;
	  }
	}
	rowActivityWork_[i] = value;
      }
    } else if (objectiveScale_!=1.0||rhsScale_!=1.0) {
      // on entry
      for (i=0;i<numberColumns_;i++) {
	double value = columnActivity_[i];
	value *= rhsScale_;
	if (fabs(value)>1.0e20) {
	  //printf("bad value of %g for column %d\n",value,i);
	  setColumnStatus(i,superBasic);
	  if (columnUpperWork_[i]<0.0) {
	    value=columnUpperWork_[i];
	  } else if (columnLowerWork_[i]>0.0) {
	    value=columnLowerWork_[i];
	  } else {
	    value=0.0;
	  }
	}
	columnActivityWork_[i] = value;
	reducedCostWork_[i] = reducedCost_[i]*objectiveScale_;
      }
      for (i=0;i<numberRows_;i++) {
	double value = rowActivity_[i];
	value *= rhsScale_;
	if (fabs(value)>1.0e20) {
	  //printf("bad value of %g for row %d\n",value,i);
	  setRowStatus(i,superBasic);
	  if (rowUpperWork_[i]<0.0) {
	    value=rowUpperWork_[i];
	  } else if (rowLowerWork_[i]>0.0) {
	    value=rowLowerWork_[i];
	  } else {
	    value=0.0;
	  }
	}
	rowActivityWork_[i] = value;
	dual_[i] *= objectiveScale_;
	rowReducedCost_[i] = dual_[i];
      }
    } else {
      // on entry
      for (i=0;i<numberColumns_;i++) {
	double value = columnActivity_[i];
	if (fabs(value)>1.0e20) {
	  //printf("bad value of %g for column %d\n",value,i);
	  setColumnStatus(i,superBasic);
	  if (columnUpperWork_[i]<0.0) {
	    value=columnUpperWork_[i];
	  } else if (columnLowerWork_[i]>0.0) {
	    value=columnLowerWork_[i];
	  } else {
	    value=0.0;
	  }
	}
	columnActivityWork_[i] = value;
	reducedCostWork_[i] = reducedCost_[i];
      }
      for (i=0;i<numberRows_;i++) {
	double value = rowActivity_[i];
	if (fabs(value)>1.0e20) {
	  //printf("bad value of %g for row %d\n",value,i);
	  setRowStatus(i,superBasic);
	  if (rowUpperWork_[i]<0.0) {
	    value=rowUpperWork_[i];
	  } else if (rowLowerWork_[i]>0.0) {
	    value=rowLowerWork_[i];
	  } else {
	    value=0.0;
	  }
	}
	rowActivityWork_[i] = value;
	rowReducedCost_[i] = dual_[i];
      }
    }
  }
  
  if (what==63&&doSanityCheck) {
    // check rim of problem okay
    if (!sanityCheck())
      goodMatrix=false;
  } 
  // we need to treat matrix as if each element by rowScaleIn and columnScaleout??
  // maybe we need to move scales to SimplexModel for factorization?
  if ((what==63&&!pivotVariable_)||(newArrays&&!keepPivots)) {
    delete [] pivotVariable_;
    pivotVariable_=new int[numberRows2];
    for (int i=0;i<numberRows2;i++)
      pivotVariable_[i]=-1;
  } else if (what==63&&!keepPivots) {
    // just reset
    for (int i=0;i<numberRows2;i++)
      pivotVariable_[i]=-1;
  } else if (what==63) {
    // check pivots
    for (int i=0;i<numberRows2;i++) {
      int iSequence = pivotVariable_[i];
      if (iSequence<numberRows_+numberColumns_&&
          getStatus(iSequence)!=basic) {
	keepPivots =false;
	break;
      }
    }
    if (!keepPivots) {
      // reset
      for (int i=0;i<numberRows2;i++)
	pivotVariable_[i]=-1;
    } else {
      // clean
      for (int i=0;i<numberColumns_+numberRows_;i++) {
	Status status =getStatus(i);
	if (status!=basic) {
	  if (upper_[i]==lower_[i]) {
	    setStatus(i,isFixed);
	    solution_[i]=lower_[i];
	  } else if (status==atLowerBound) {
	    if (lower_[i]>-1.0e20) {
              solution_[i]=lower_[i];
            } else {
              //printf("seq %d at lower of %g\n",i,lower_[i]);
              if (upper_[i]<1.0e20) {
                solution_[i]=upper_[i];
                setStatus(i,atUpperBound);
              } else {
                setStatus(i,isFree);
              }
            }
	  } else if (status==atUpperBound) {
	    if (upper_[i]<1.0e20) {
              solution_[i]=upper_[i];
            } else {
              //printf("seq %d at upper of %g\n",i,upper_[i]);
              if (lower_[i]>-1.0e20) {
                solution_[i]=lower_[i];
                setStatus(i,atLowerBound);
              } else {
                setStatus(i,isFree);
              }
            }
	  } else if (status==isFixed&&upper_[i]>lower_[i]) {
	    // was fixed - not now
	    if (solution_[i]<=lower_[i]) {
	      setStatus(i,atLowerBound);
	    } else if (solution_[i]>=upper_[i]) {
	      setStatus(i,atUpperBound);
	    } else {
	      setStatus(i,superBasic);
	    }
	  }
	}
      }
    }
  }
  
  if (what==63) {
    if (newArrays) {
      // get some arrays
      int iRow,iColumn;
      // these are "indexed" arrays so we always know where nonzeros are
      /**********************************************************
      rowArray_[3] is long enough for rows+columns
      rowArray_[1] is long enough for max(rows,columns)
      *********************************************************/
      for (iRow=0;iRow<4;iRow++) {
	int length =numberRows2+factorization_->maximumPivots();
	if (iRow==3||objective_->type()>1)
	  length += numberColumns_;
	else if (iRow==1)
	  length = CoinMax(length,numberColumns_);
	if ((specialOptions_&65536)==0||!rowArray_[iRow]) {
	  delete rowArray_[iRow];
	  rowArray_[iRow]=new CoinIndexedVector();
	}
	rowArray_[iRow]->reserve(length);
      }
      
      for (iColumn=0;iColumn<2;iColumn++) {
	if ((specialOptions_&65536)==0||!columnArray_[iColumn]) {
	  delete columnArray_[iColumn];
	  columnArray_[iColumn]=new CoinIndexedVector();
	}
	if (!iColumn)
	  columnArray_[iColumn]->reserve(numberColumns_);
	else
	  columnArray_[iColumn]->reserve(CoinMax(numberRows2,numberColumns_));
      }
    } else {
      int iRow,iColumn;
      for (iRow=0;iRow<4;iRow++) {
	int length =numberRows2+factorization_->maximumPivots();
	if (iRow==3||objective_->type()>1)
	  length += numberColumns_;
	if(rowArray_[iRow]->capacity()>=length) {
	  rowArray_[iRow]->clear();
	} else {
	  // model size or maxinv changed
	  rowArray_[iRow]->reserve(length);
	}
#ifndef NDEBUG
        rowArray_[iRow]->checkClear();
#endif
      }
      
      for (iColumn=0;iColumn<2;iColumn++) {
	int length =numberColumns_;
	if (iColumn)
	  length=CoinMax(numberRows2,numberColumns_);
	if(columnArray_[iColumn]->capacity()>=length) {
	  columnArray_[iColumn]->clear();
	} else {
	  // model size or maxinv changed
	  columnArray_[iColumn]->reserve(length);
	}
#ifndef NDEBUG
        columnArray_[iColumn]->checkClear();
#endif
      }
    }    
  }
  if (problemStatus_==10) {
    problemStatus_=-1;
    handler_->setLogLevel(saveLevel); // switch back messages
  }
  if ((what&5)!=0) 
    matrix_->generalExpanded(this,9,what); // update costs and bounds if necessary
  if (goodMatrix&&(specialOptions_&65536)!=0) {
    int save = maximumColumns_+maximumRows_;
    CoinMemcpyN(cost_,numberTotal,cost_+save);
    CoinMemcpyN(lower_,numberTotal,lower_+save);
    CoinMemcpyN(upper_,numberTotal,upper_+save);
    CoinMemcpyN(dj_,numberTotal,dj_+save);
    CoinMemcpyN(solution_,numberTotal,solution_+save);
    if (rowScale_&&!savedRowScale_) {
      double * temp;
      temp = new double [4*maximumRows_];
      CoinFillN(temp,4*maximumRows_,1.0);
      CoinMemcpyN(rowScale_,numberRows2,temp);
      CoinMemcpyN(rowScale_+numberRows2,numberRows2,temp+maximumRows_);
      CoinMemcpyN(rowScale_,numberRows2,temp+2*maximumRows_);
      CoinMemcpyN(rowScale_+numberRows2,numberRows2,temp+3*maximumRows_);
      delete [] rowScale_;
      savedRowScale_ = temp;
      rowScale_ = savedRowScale_;
      inverseRowScale_ = savedRowScale_+maximumInternalRows_;
      temp = new double [4*maximumColumns_];
      CoinFillN(temp,4*maximumColumns_,1.0);
      CoinMemcpyN(columnScale_,numberColumns_,temp);
      CoinMemcpyN(columnScale_+numberColumns_,numberColumns_,temp+maximumColumns_);
      CoinMemcpyN(columnScale_,numberColumns_,temp+2*maximumColumns_);
      CoinMemcpyN(columnScale_+numberColumns_,numberColumns_,temp+3*maximumColumns_);
      delete [] columnScale_;
      savedColumnScale_ = temp;
      columnScale_ = savedColumnScale_;
      inverseColumnScale_ = savedColumnScale_+maximumInternalColumns_;
    }
  }
  return goodMatrix;
}
// Does rows and columns
void
ClpSimplex::createRim1(bool initial)
{
  int i;
  int numberRows2 = numberRows_+numberExtraRows_;
  int numberTotal = numberRows2+numberColumns_;
  if ((specialOptions_&65536)!=0&&true) {
    assert (!initial);
    int save = maximumColumns_+maximumRows_;
    CoinMemcpyN(lower_+save,numberTotal,lower_);
    CoinMemcpyN(upper_+save,numberTotal,upper_);
    return;
  }
  const double * rowScale = rowScale_;
  // clean up any mismatches on infinity
  // and fix any variables with tiny gaps
  double primalTolerance=dblParam_[ClpPrimalTolerance];
  if(rowScale) {
    // If scaled then do all columns later in one loop 
    if (!initial) {
      const double * inverseScale = inverseColumnScale_;
      for (i=0;i<numberColumns_;i++) {
	double multiplier = rhsScale_*inverseScale[i];
	double lowerValue = columnLower_[i];
	double upperValue = columnUpper_[i];
	if (lowerValue>-1.0e20) {
	  columnLowerWork_[i]=lowerValue*multiplier;
	  if (upperValue>=1.0e20) {
	    columnUpperWork_[i]=COIN_DBL_MAX;
	  } else {
	    columnUpperWork_[i]=upperValue*multiplier;
	    if (fabs(columnUpperWork_[i]-columnLowerWork_[i])<=primalTolerance) {
	      if (columnLowerWork_[i]>=0.0) {
		columnUpperWork_[i] = columnLowerWork_[i];
	      } else if (columnUpperWork_[i]<=0.0) {
		columnLowerWork_[i] = columnUpperWork_[i];
	      } else {
		columnUpperWork_[i] = 0.0;
		columnLowerWork_[i] = 0.0;
	      }
	    }
	  }
	} else if (upperValue<1.0e20) {
	  columnLowerWork_[i]=-COIN_DBL_MAX;
	  columnUpperWork_[i]=upperValue*multiplier;
	} else {
	  // free
	  columnLowerWork_[i]=-COIN_DBL_MAX;
	  columnUpperWork_[i]=COIN_DBL_MAX;
	}
      }
    }
    for (i=0;i<numberRows_;i++) {
      double multiplier = rhsScale_*rowScale[i];
      double lowerValue = rowLower_[i];
      double upperValue = rowUpper_[i];
      if (lowerValue>-1.0e20) {
	rowLowerWork_[i]=lowerValue*multiplier;
	if (upperValue>=1.0e20) {
	  rowUpperWork_[i]=COIN_DBL_MAX;
	} else {
	  rowUpperWork_[i]=upperValue*multiplier;
	  if (fabs(rowUpperWork_[i]-rowLowerWork_[i])<=primalTolerance) {
	    if (rowLowerWork_[i]>=0.0) {
	      rowUpperWork_[i] = rowLowerWork_[i];
	    } else if (rowUpperWork_[i]<=0.0) {
	      rowLowerWork_[i] = rowUpperWork_[i];
	    } else {
	      rowUpperWork_[i] = 0.0;
	      rowLowerWork_[i] = 0.0;
	    }
	  }
	}
      } else if (upperValue<1.0e20) {
	rowLowerWork_[i]=-COIN_DBL_MAX;
	rowUpperWork_[i]=upperValue*multiplier;
      } else {
	// free
	rowLowerWork_[i]=-COIN_DBL_MAX;
	rowUpperWork_[i]=COIN_DBL_MAX;
      }
    }
  } else if (rhsScale_!=1.0) {
    for (i=0;i<numberColumns_;i++) {
      double lowerValue = columnLower_[i];
      double upperValue = columnUpper_[i];
      if (lowerValue>-1.0e20) {
	columnLowerWork_[i]=lowerValue*rhsScale_;
	if (upperValue>=1.0e20) {
	  columnUpperWork_[i]=COIN_DBL_MAX;
	} else {
	  columnUpperWork_[i]=upperValue*rhsScale_;
	  if (fabs(columnUpperWork_[i]-columnLowerWork_[i])<=primalTolerance) {
	    if (columnLowerWork_[i]>=0.0) {
	      columnUpperWork_[i] = columnLowerWork_[i];
	    } else if (columnUpperWork_[i]<=0.0) {
	      columnLowerWork_[i] = columnUpperWork_[i];
	    } else {
	      columnUpperWork_[i] = 0.0;
	      columnLowerWork_[i] = 0.0;
	    }
	  }
	}
      } else if (upperValue<1.0e20) {
	columnLowerWork_[i]=-COIN_DBL_MAX;
	columnUpperWork_[i]=upperValue*rhsScale_;
      } else {
	// free
	columnLowerWork_[i]=-COIN_DBL_MAX;
	columnUpperWork_[i]=COIN_DBL_MAX;
      }
    }
    for (i=0;i<numberRows_;i++) {
      double lowerValue = rowLower_[i];
      double upperValue = rowUpper_[i];
      if (lowerValue>-1.0e20) {
	rowLowerWork_[i]=lowerValue*rhsScale_;
	if (upperValue>=1.0e20) {
	  rowUpperWork_[i]=COIN_DBL_MAX;
	} else {
	  rowUpperWork_[i]=upperValue*rhsScale_;
	  if (fabs(rowUpperWork_[i]-rowLowerWork_[i])<=primalTolerance) {
	    if (rowLowerWork_[i]>=0.0) {
	      rowUpperWork_[i] = rowLowerWork_[i];
	    } else if (rowUpperWork_[i]<=0.0) {
	      rowLowerWork_[i] = rowUpperWork_[i];
	    } else {
	      rowUpperWork_[i] = 0.0;
	      rowLowerWork_[i] = 0.0;
	    }
	  }
	}
      } else if (upperValue<1.0e20) {
	rowLowerWork_[i]=-COIN_DBL_MAX;
	rowUpperWork_[i]=upperValue*rhsScale_;
      } else {
	// free
	rowLowerWork_[i]=-COIN_DBL_MAX;
	rowUpperWork_[i]=COIN_DBL_MAX;
      }
    }
  } else {
    for (i=0;i<numberColumns_;i++) {
      double lowerValue = columnLower_[i];
      double upperValue = columnUpper_[i];
      if (lowerValue>-1.0e20) {
	columnLowerWork_[i]=lowerValue;
	if (upperValue>=1.0e20) {
	  columnUpperWork_[i]=COIN_DBL_MAX;
	} else {
	  columnUpperWork_[i]=upperValue;
	  if (fabs(columnUpperWork_[i]-columnLowerWork_[i])<=primalTolerance) {
	    if (columnLowerWork_[i]>=0.0) {
	      columnUpperWork_[i] = columnLowerWork_[i];
	    } else if (columnUpperWork_[i]<=0.0) {
	      columnLowerWork_[i] = columnUpperWork_[i];
	    } else {
	      columnUpperWork_[i] = 0.0;
	      columnLowerWork_[i] = 0.0;
	    }
	  }
	}
      } else if (upperValue<1.0e20) {
	columnLowerWork_[i]=-COIN_DBL_MAX;
	columnUpperWork_[i]=upperValue;
      } else {
	// free
	columnLowerWork_[i]=-COIN_DBL_MAX;
	columnUpperWork_[i]=COIN_DBL_MAX;
      }
    }
    for (i=0;i<numberRows_;i++) {
      double lowerValue = rowLower_[i];
      double upperValue = rowUpper_[i];
      if (lowerValue>-1.0e20) {
	rowLowerWork_[i]=lowerValue;
	if (upperValue>=1.0e20) {
	  rowUpperWork_[i]=COIN_DBL_MAX;
	} else {
	  rowUpperWork_[i]=upperValue;
	  if (fabs(rowUpperWork_[i]-rowLowerWork_[i])<=primalTolerance) {
	    if (rowLowerWork_[i]>=0.0) {
	      rowUpperWork_[i] = rowLowerWork_[i];
	    } else if (rowUpperWork_[i]<=0.0) {
	      rowLowerWork_[i] = rowUpperWork_[i];
	    } else {
	      rowUpperWork_[i] = 0.0;
	      rowLowerWork_[i] = 0.0;
	    }
	  }
	}
      } else if (upperValue<1.0e20) {
	rowLowerWork_[i]=-COIN_DBL_MAX;
	rowUpperWork_[i]=upperValue;
      } else {
	// free
	rowLowerWork_[i]=-COIN_DBL_MAX;
	rowUpperWork_[i]=COIN_DBL_MAX;
      }
    }
  }
#ifndef NDEBUG
  if ((specialOptions_&65536)!=0&&false) {
    assert (!initial);
    int save = maximumColumns_+maximumRows_;
    for (int i=0;i<numberTotal;i++) {
      assert (fabs(lower_[i]-lower_[i+save])<1.0e-5);
      assert (fabs(upper_[i]-upper_[i+save])<1.0e-5);
    }
  }
#endif
}
// Does objective
void
ClpSimplex::createRim4(bool initial)
{
  int i;
  int numberRows2 = numberRows_+numberExtraRows_;
  int numberTotal = numberRows2+numberColumns_;
  if ((specialOptions_&65536)!=0&&true) {
    assert (!initial);
    int save = maximumColumns_+maximumRows_;
    CoinMemcpyN(cost_+save,numberTotal,cost_);
    return;
  }
  double direction = optimizationDirection_*objectiveScale_;
  const double * obj = objective();
  const double * rowScale = rowScale_;
  const double * columnScale = columnScale_;
  // and also scale by scale factors
  if (rowScale) {
    if (rowObjective_) {
      for (i=0;i<numberRows_;i++)
	rowObjectiveWork_[i] = rowObjective_[i]*direction/rowScale[i];
    } else {
      memset(rowObjectiveWork_,0,numberRows_*sizeof(double));
    }
    // If scaled then do all columns later in one loop 
    if (!initial) {
      for (i=0;i<numberColumns_;i++) {
	CoinAssert(fabs(obj[i])<1.0e25);
	objectiveWork_[i] = obj[i]*direction*columnScale[i];
      }
    }
  } else {
    if (rowObjective_) {
      for (i=0;i<numberRows_;i++)
	rowObjectiveWork_[i] = rowObjective_[i]*direction;
    } else {
      memset(rowObjectiveWork_,0,numberRows_*sizeof(double));
    }
    for (i=0;i<numberColumns_;i++) {
      CoinAssert(fabs(obj[i])<1.0e25);
      objectiveWork_[i] = obj[i]*direction;
    }
  }
}
// Does rows and columns and objective
void
ClpSimplex::createRim5(bool initial)
{
  createRim4(initial);
  createRim1(initial);
}
void
ClpSimplex::deleteRim(int getRidOfFactorizationData)
{
  // Just possible empty problem
  int numberRows=numberRows_;
  int numberColumns=numberColumns_;
  if (!numberRows||!numberColumns) {
    numberRows=0;
    if (objective_->type()<2)
      numberColumns=0;
  }
  int i;
  if (problemStatus_!=1&&problemStatus_!=2) {
    delete [] ray_;
    ray_=NULL;
  }
  // set upperOut_ to furthest away from bound so can use in dual for dualBound_
  upperOut_=1.0;
#if 0
  {
    int nBad=0;
    for (i=0;i<numberColumns;i++) {
      if (lower_[i]==upper_[i]&&getColumnStatus(i)==basic)
	nBad++;
    }
    if (nBad)
      printf("yy %d basic fixed\n",nBad);
  }
#endif
  // ray may be null if in branch and bound
  if (rowScale_) {
    // Collect infeasibilities
    int numberPrimalScaled=0;
    int numberPrimalUnscaled=0;
    int numberDualScaled=0;
    int numberDualUnscaled=0;
    double scaleC = 1.0/objectiveScale_;
    double scaleR = 1.0/rhsScale_;
    const double * inverseScale = inverseColumnScale_;
    for (i=0;i<numberColumns;i++) {
      double scaleFactor = columnScale_[i];
      double valueScaled = columnActivityWork_[i];
      double lowerScaled = columnLowerWork_[i];
      double upperScaled = columnUpperWork_[i];
      if (lowerScaled>-1.0e20||upperScaled<1.0e20) {
	if (valueScaled<lowerScaled-primalTolerance_||
	    valueScaled>upperScaled+primalTolerance_)
	  numberPrimalScaled++;
	else
	  upperOut_ = CoinMax(upperOut_,CoinMin(valueScaled-lowerScaled,upperScaled-valueScaled));
      }
      columnActivity_[i] = valueScaled*scaleFactor*scaleR;
      double value = columnActivity_[i];
      if (value<columnLower_[i]-primalTolerance_)
	numberPrimalUnscaled++;
      else if (value>columnUpper_[i]+primalTolerance_)
	numberPrimalUnscaled++;
      double valueScaledDual = reducedCostWork_[i];
      if (valueScaled>columnLowerWork_[i]+primalTolerance_&&valueScaledDual>dualTolerance_)
	numberDualScaled++;
      if (valueScaled<columnUpperWork_[i]-primalTolerance_&&valueScaledDual<-dualTolerance_)
	numberDualScaled++;
      reducedCost_[i] = (valueScaledDual*scaleC)*inverseScale[i];
      double valueDual = reducedCost_[i];
      if (value>columnLower_[i]+primalTolerance_&&valueDual>dualTolerance_)
	numberDualUnscaled++;
      if (value<columnUpper_[i]-primalTolerance_&&valueDual<-dualTolerance_)
	numberDualUnscaled++;
    }
    inverseScale = inverseRowScale_;
    for (i=0;i<numberRows;i++) {
      double scaleFactor = rowScale_[i];
      double valueScaled = rowActivityWork_[i];
      double lowerScaled = rowLowerWork_[i];
      double upperScaled = rowUpperWork_[i];
      if (lowerScaled>-1.0e20||upperScaled<1.0e20) {
	if (valueScaled<lowerScaled-primalTolerance_||
	    valueScaled>upperScaled+primalTolerance_)
	  numberPrimalScaled++;
	else
	  upperOut_ = CoinMax(upperOut_,CoinMin(valueScaled-lowerScaled,upperScaled-valueScaled));
      }
      rowActivity_[i] = (valueScaled*scaleR)*inverseScale[i];
      double value = rowActivity_[i];
      if (value<rowLower_[i]-primalTolerance_)
	numberPrimalUnscaled++;
      else if (value>rowUpper_[i]+primalTolerance_)
	numberPrimalUnscaled++;
      double valueScaledDual = dual_[i]+rowObjectiveWork_[i];;
      if (valueScaled>rowLowerWork_[i]+primalTolerance_&&valueScaledDual>dualTolerance_)
	numberDualScaled++;
      if (valueScaled<rowUpperWork_[i]-primalTolerance_&&valueScaledDual<-dualTolerance_)
	numberDualScaled++;
      dual_[i] *= scaleFactor*scaleC;
      double valueDual = dual_[i]; 
      if (rowObjective_)
	valueDual += rowObjective_[i];
      if (value>rowLower_[i]+primalTolerance_&&valueDual>dualTolerance_)
	numberDualUnscaled++;
      if (value<rowUpper_[i]-primalTolerance_&&valueDual<-dualTolerance_)
	numberDualUnscaled++;
    }
    if (!problemStatus_&&!secondaryStatus_) {
      // See if we need to set secondary status
      if (numberPrimalUnscaled) {
	if (numberDualUnscaled) 
	  secondaryStatus_=4;
	else
	  secondaryStatus_=2;
      } else {
	if (numberDualUnscaled) 
	  secondaryStatus_=3;
      }
    }
    if (problemStatus_==2) {
      for (i=0;i<numberColumns;i++) {
	ray_[i] *= columnScale_[i];
      }
    } else if (problemStatus_==1&&ray_) {
      for (i=0;i<numberRows;i++) {
	ray_[i] *= rowScale_[i];
      }
    }
  } else if (rhsScale_!=1.0||objectiveScale_!=1.0) {
    // Collect infeasibilities
    int numberPrimalScaled=0;
    int numberPrimalUnscaled=0;
    int numberDualScaled=0;
    int numberDualUnscaled=0;
    double scaleC = 1.0/objectiveScale_;
    double scaleR = 1.0/rhsScale_;
    for (i=0;i<numberColumns;i++) {
      double valueScaled = columnActivityWork_[i];
      double lowerScaled = columnLowerWork_[i];
      double upperScaled = columnUpperWork_[i];
      if (lowerScaled>-1.0e20||upperScaled<1.0e20) {
	if (valueScaled<lowerScaled-primalTolerance_||
	    valueScaled>upperScaled+primalTolerance_)
	  numberPrimalScaled++;
	else
	  upperOut_ = CoinMax(upperOut_,CoinMin(valueScaled-lowerScaled,upperScaled-valueScaled));
      }
      columnActivity_[i] = valueScaled*scaleR;
      double value = columnActivity_[i];
      if (value<columnLower_[i]-primalTolerance_)
	numberPrimalUnscaled++;
      else if (value>columnUpper_[i]+primalTolerance_)
	numberPrimalUnscaled++;
      double valueScaledDual = reducedCostWork_[i];
      if (valueScaled>columnLowerWork_[i]+primalTolerance_&&valueScaledDual>dualTolerance_)
	numberDualScaled++;
      if (valueScaled<columnUpperWork_[i]-primalTolerance_&&valueScaledDual<-dualTolerance_)
	numberDualScaled++;
      reducedCost_[i] = valueScaledDual*scaleC;
      double valueDual = reducedCost_[i];
      if (value>columnLower_[i]+primalTolerance_&&valueDual>dualTolerance_)
	numberDualUnscaled++;
      if (value<columnUpper_[i]-primalTolerance_&&valueDual<-dualTolerance_)
	numberDualUnscaled++;
    }
    for (i=0;i<numberRows;i++) {
      double valueScaled = rowActivityWork_[i];
      double lowerScaled = rowLowerWork_[i];
      double upperScaled = rowUpperWork_[i];
      if (lowerScaled>-1.0e20||upperScaled<1.0e20) {
	if (valueScaled<lowerScaled-primalTolerance_||
	    valueScaled>upperScaled+primalTolerance_)
	  numberPrimalScaled++;
	else
	  upperOut_ = CoinMax(upperOut_,CoinMin(valueScaled-lowerScaled,upperScaled-valueScaled));
      }
      rowActivity_[i] = valueScaled*scaleR;
      double value = rowActivity_[i];
      if (value<rowLower_[i]-primalTolerance_)
	numberPrimalUnscaled++;
      else if (value>rowUpper_[i]+primalTolerance_)
	numberPrimalUnscaled++;
      double valueScaledDual = dual_[i]+rowObjectiveWork_[i];;
      if (valueScaled>rowLowerWork_[i]+primalTolerance_&&valueScaledDual>dualTolerance_)
	numberDualScaled++;
      if (valueScaled<rowUpperWork_[i]-primalTolerance_&&valueScaledDual<-dualTolerance_)
	numberDualScaled++;
      dual_[i] *= scaleC;
      double valueDual = dual_[i]; 
      if (rowObjective_)
	valueDual += rowObjective_[i];
      if (value>rowLower_[i]+primalTolerance_&&valueDual>dualTolerance_)
	numberDualUnscaled++;
      if (value<rowUpper_[i]-primalTolerance_&&valueDual<-dualTolerance_)
	numberDualUnscaled++;
    }
    if (!problemStatus_&&!secondaryStatus_) {
      // See if we need to set secondary status
      if (numberPrimalUnscaled) {
	if (numberDualUnscaled) 
	  secondaryStatus_=4;
	else
	  secondaryStatus_=2;
      } else {
	if (numberDualUnscaled) 
	  secondaryStatus_=3;
      }
    }
  } else {
    if (columnActivityWork_) {
      for (i=0;i<numberColumns;i++) {
	double value = columnActivityWork_[i];
	double lower = columnLowerWork_[i];
	double upper = columnUpperWork_[i];
	if (lower>-1.0e20||upper<1.0e20) {
	  if (value>lower&&value<upper)
	    upperOut_ = CoinMax(upperOut_,CoinMin(value-lower,upper-value));
	}
	columnActivity_[i] = columnActivityWork_[i];
	reducedCost_[i] = reducedCostWork_[i];
      }
      for (i=0;i<numberRows;i++) {
	double value = rowActivityWork_[i];
	double lower = rowLowerWork_[i];
	double upper = rowUpperWork_[i];
	if (lower>-1.0e20||upper<1.0e20) {
	  if (value>lower&&value<upper)
	    upperOut_ = CoinMax(upperOut_,CoinMin(value-lower,upper-value));
	}
	rowActivity_[i] = rowActivityWork_[i];
      }
    }
  }
  // switch off scalefactor if auto
  if (automaticScale_) {
    rhsScale_=1.0;
    objectiveScale_=1.0;
  }
  if (optimizationDirection_!=1.0) {
    // and modify all dual signs
    for (i=0;i<numberColumns;i++) 
      reducedCost_[i] *= optimizationDirection_;
      for (i=0;i<numberRows;i++) 
        dual_[i] *= optimizationDirection_;
  }
  // scaling may have been turned off
  scalingFlag_ = abs(scalingFlag_);
  if(getRidOfFactorizationData>0) {
    gutsOfDelete(getRidOfFactorizationData+1);
  } else {
    // at least get rid of nonLinearCost_
    delete nonLinearCost_;
    nonLinearCost_=NULL;
  }
  if (!rowObjective_&&problemStatus_==0&&objective_->type()==1&&
      numberRows&&numberColumns) {
  // Redo objective value
    double objectiveValue =0.0;
    const double * cost = objective();
    for (int i=0;i<numberColumns;i++) {
      double value = columnActivity_[i];
      objectiveValue += value*cost[i];
    }
    //if (fabs(objectiveValue_ -objectiveValue*optimizationDirection())>1.0e-5)
    //printf("old obj %g new %g\n",objectiveValue_, objectiveValue*optimizationDirection());
    objectiveValue_ = objectiveValue*optimizationDirection();
  }
  // get rid of data
  matrix_->generalExpanded(this,13,scalingFlag_);
}
void 
ClpSimplex::setDualBound(double value)
{
  if (value>0.0)
    dualBound_=value;
}
void 
ClpSimplex::setInfeasibilityCost(double value)
{
  if (value>0.0)
    infeasibilityCost_=value;
}
void ClpSimplex::setNumberRefinements( int value) 
{
  if (value>=0&&value<10)
    numberRefinements_=value;
}
// Sets row pivot choice algorithm in dual
void 
ClpSimplex::setDualRowPivotAlgorithm(ClpDualRowPivot & choice)
{
  delete dualRowPivot_;
  dualRowPivot_ = choice.clone(true);
  dualRowPivot_->setModel(this);
}
// Sets row pivot choice algorithm in dual
void 
ClpSimplex::setPrimalColumnPivotAlgorithm(ClpPrimalColumnPivot & choice)
{
  delete primalColumnPivot_;
  primalColumnPivot_ = choice.clone(true);
  primalColumnPivot_->setModel(this);
}
void 
ClpSimplex::setFactorization( ClpFactorization & factorization)
{
  if (factorization_) 
    factorization_->setFactorization(factorization);
  else
    factorization_ = new ClpFactorization(factorization,
					  numberRows_);
}

// Swaps factorization
ClpFactorization * 
ClpSimplex::swapFactorization( ClpFactorization * factorization)
{
  ClpFactorization * swap =factorization_;
  factorization_= factorization;
  return swap;
}
// Copies in factorization to existing one
void 
ClpSimplex::copyFactorization( ClpFactorization & factorization)
{
  *factorization_= factorization;
}
/* Perturbation:
   -50 to +50 - perturb by this power of ten (-6 sounds good)
   100 - auto perturb if takes too long (1.0e-6 largest nonzero)
   101 - we are perturbed
   102 - don't try perturbing again
   default is 100
*/
void 
ClpSimplex::setPerturbation(int value)
{
  if(value<=100&&value >=-1000) {
    perturbation_=value;
  } 
}
// Sparsity on or off
bool 
ClpSimplex::sparseFactorization() const
{
  return factorization_->sparseThreshold()!=0;
}
void 
ClpSimplex::setSparseFactorization(bool value)
{
  if (value) {
    if (!factorization_->sparseThreshold())
      factorization_->goSparse();
  } else {
    factorization_->sparseThreshold(0);
  }
}
void checkCorrect(ClpSimplex * /*model*/,int iRow,
		  const double * element,const int * rowStart,const int * rowLength,
		  const int * column,
		  const double * columnLower_, const double * columnUpper_,
		  int /*infiniteUpperC*/,
		  int /*infiniteLowerC*/,
		  double &maximumUpC,
		  double &maximumDownC)
{
  int infiniteUpper = 0;
  int infiniteLower = 0;
  double maximumUp = 0.0;
  double maximumDown = 0.0;
  CoinBigIndex rStart = rowStart[iRow];
  CoinBigIndex rEnd = rowStart[iRow]+rowLength[iRow];
  CoinBigIndex j;
  double large=1.0e15;
  int iColumn;
  // Compute possible lower and upper ranges
  
  for (j = rStart; j < rEnd; ++j) {
    double value=element[j];
    iColumn = column[j];
    if (value > 0.0) {
      if (columnUpper_[iColumn] >= large) {
	++infiniteUpper;
      } else {
	maximumUp += columnUpper_[iColumn] * value;
      }
      if (columnLower_[iColumn] <= -large) {
	++infiniteLower;
      } else {
	maximumDown += columnLower_[iColumn] * value;
      }
    } else if (value<0.0) {
      if (columnUpper_[iColumn] >= large) {
	++infiniteLower;
      } else {
	maximumDown += columnUpper_[iColumn] * value;
      }
      if (columnLower_[iColumn] <= -large) {
	++infiniteUpper;
      } else {
	maximumUp += columnLower_[iColumn] * value;
      }
    }
  }
  //assert (infiniteLowerC==infiniteLower);
  //assert (infiniteUpperC==infiniteUpper);
  if (fabs(maximumUp-maximumUpC)>1.0e-12*CoinMax(fabs(maximumUp),fabs(maximumUpC)))
    printf("row %d comp up %g, true up %g\n",iRow,
	   maximumUpC,maximumUp);
  if (fabs(maximumDown-maximumDownC)>1.0e-12*CoinMax(fabs(maximumDown),fabs(maximumDownC)))
    printf("row %d comp down %g, true down %g\n",iRow,
	   maximumDownC,maximumDown);
  maximumUpC=maximumUp;
  maximumDownC=maximumDown;
}

/* Tightens primal bounds to make dual faster.  Unless
   fixed, bounds are slightly looser than they could be.
   This is to make dual go faster and is probably not needed
   with a presolve.  Returns non-zero if problem infeasible

   Fudge for branch and bound - put bounds on columns of factor *
   largest value (at continuous) - should improve stability
   in branch and bound on infeasible branches (0.0 is off)
*/
int 
ClpSimplex::tightenPrimalBounds(double factor,int doTight,bool tightIntegers)
{
  
  // Get a row copy in standard format
  CoinPackedMatrix copy;
  copy.setExtraGap(0.0);
  copy.setExtraMajor(0.0);
  copy.reverseOrderedCopyOf(*matrix());
  // Matrix may have been created so get rid of it
  matrix_->releasePackedMatrix();
  // get matrix data pointers
  const int * column = copy.getIndices();
  const CoinBigIndex * rowStart = copy.getVectorStarts();
  const int * rowLength = copy.getVectorLengths(); 
  const double * element = copy.getElements();
  int numberChanged=1,iPass=0;
  double large = largeValue(); // treat bounds > this as infinite
#ifndef NDEBUG
  double large2= 1.0e10*large;
#endif
  int numberInfeasible=0;
  int totalTightened = 0;

  double tolerance = primalTolerance();


  // Save column bounds
  double * saveLower = new double [numberColumns_];
  CoinMemcpyN(columnLower_,numberColumns_,saveLower);
  double * saveUpper = new double [numberColumns_];
  CoinMemcpyN(columnUpper_,numberColumns_,saveUpper);

  int iRow, iColumn;
  // If wanted compute a reasonable dualBound_
  if (factor==COIN_DBL_MAX) {
    factor=0.0;
    if (dualBound_==1.0e10) {
      // get largest scaled away from bound
      double largest=1.0e-12;
      double largestScaled=1.0e-12;
      int iRow;
      for (iRow=0;iRow<numberRows_;iRow++) {
	double value = rowActivity_[iRow];
	double above = value-rowLower_[iRow];
	double below = rowUpper_[iRow]-value;
	if (above<1.0e12) {
	  largest = CoinMax(largest,above);
	}
	if (below<1.0e12) {
	  largest = CoinMax(largest,below);
	}
	if (rowScale_) {
	  double multiplier = rowScale_[iRow];
	  above *= multiplier;
	  below *= multiplier;
	}
	if (above<1.0e12) {
	  largestScaled = CoinMax(largestScaled,above);
	}
	if (below<1.0e12) {
	  largestScaled = CoinMax(largestScaled,below);
	}
      }
      
      int iColumn;
      for (iColumn=0;iColumn<numberColumns_;iColumn++) {
	double value = columnActivity_[iColumn];
	double above = value-columnLower_[iColumn];
	double below = columnUpper_[iColumn]-value;
	if (above<1.0e12) {
	  largest = CoinMax(largest,above);
	}
	if (below<1.0e12) {
	  largest = CoinMax(largest,below);
	}
	if (columnScale_) {
	  double multiplier = 1.0/columnScale_[iColumn];
	  above *= multiplier;
	  below *= multiplier;
	}
	if (above<1.0e12) {
	  largestScaled = CoinMax(largestScaled,above);
	}
	if (below<1.0e12) {
	  largestScaled = CoinMax(largestScaled,below);
	}
      }
      std::cout<<"Largest (scaled) away from bound "<<largestScaled
	       <<" unscaled "<<largest<<std::endl;
      dualBound_=CoinMax(1.0001e7,CoinMin(100.0*largest,1.00001e10));
    }
  }

  // If wanted - tighten column bounds using solution
  if (factor) {
    double largest=0.0;
    if (factor>0.0) {
      assert (factor>1.0);
      for (iColumn=0;iColumn<numberColumns_;iColumn++) {
        if (columnUpper_[iColumn]-columnLower_[iColumn]>tolerance) {
          largest = CoinMax(largest,fabs(columnActivity_[iColumn]));
        }
      }
      largest *= factor;
    } else {
      // absolute
       largest = - factor;
    }
    for (iColumn=0;iColumn<numberColumns_;iColumn++) {
      if (columnUpper_[iColumn]-columnLower_[iColumn]>tolerance) {
        columnUpper_[iColumn] = CoinMin(columnUpper_[iColumn],largest);
        columnLower_[iColumn] = CoinMax(columnLower_[iColumn],-largest);
      }
    }
  }
#define MAXPASS 10

  // Loop round seeing if we can tighten bounds
  // Would be faster to have a stack of possible rows
  // and we put altered rows back on stack
  int numberCheck=-1;
  while(numberChanged>numberCheck) {

    numberChanged = 0; // Bounds tightened this pass
    
    if (iPass==MAXPASS) break;
    iPass++;
    
    for (iRow = 0; iRow < numberRows_; iRow++) {

      if (rowLower_[iRow]>-large||rowUpper_[iRow]<large) {

	// possible row
	int infiniteUpper = 0;
	int infiniteLower = 0;
	double maximumUp = 0.0;
	double maximumDown = 0.0;
	double newBound;
	CoinBigIndex rStart = rowStart[iRow];
	CoinBigIndex rEnd = rowStart[iRow]+rowLength[iRow];
	CoinBigIndex j;
	// Compute possible lower and upper ranges
      
	for (j = rStart; j < rEnd; ++j) {
	  double value=element[j];
	  iColumn = column[j];
	  if (value > 0.0) {
	    if (columnUpper_[iColumn] >= large) {
	      ++infiniteUpper;
	    } else {
	      maximumUp += columnUpper_[iColumn] * value;
	    }
	    if (columnLower_[iColumn] <= -large) {
	      ++infiniteLower;
	    } else {
	      maximumDown += columnLower_[iColumn] * value;
	    }
	  } else if (value<0.0) {
	    if (columnUpper_[iColumn] >= large) {
	      ++infiniteLower;
	    } else {
	      maximumDown += columnUpper_[iColumn] * value;
	    }
	    if (columnLower_[iColumn] <= -large) {
	      ++infiniteUpper;
	    } else {
	      maximumUp += columnLower_[iColumn] * value;
	    }
	  }
	}
	// Build in a margin of error
	maximumUp += 1.0e-8*fabs(maximumUp);
	maximumDown -= 1.0e-8*fabs(maximumDown);
	double maxUp = maximumUp+infiniteUpper*1.0e31;
	double maxDown = maximumDown-infiniteLower*1.0e31;
	if (maxUp <= rowUpper_[iRow] + tolerance && 
	    maxDown >= rowLower_[iRow] - tolerance) {
	  
	  // Row is redundant - make totally free
	  // NO - can't do this for postsolve
	  // rowLower_[iRow]=-COIN_DBL_MAX;
	  // rowUpper_[iRow]=COIN_DBL_MAX;
	  //printf("Redundant row in presolveX %d\n",iRow);

	} else {
	  if (maxUp < rowLower_[iRow] -100.0*tolerance ||
	      maxDown > rowUpper_[iRow]+100.0*tolerance) {
	    // problem is infeasible - exit at once
	    numberInfeasible++;
	    break;
	  }
	  double lower = rowLower_[iRow];
	  double upper = rowUpper_[iRow];
	  for (j = rStart; j < rEnd; ++j) {
	    double value=element[j];
	    iColumn = column[j];
	    double nowLower = columnLower_[iColumn];
	    double nowUpper = columnUpper_[iColumn];
	    if (value > 0.0) {
	      // positive value
	      if (lower>-large) {
		if (!infiniteUpper) {
		  assert(nowUpper < large2);
		  newBound = nowUpper + 
		    (lower - maximumUp) / value;
		  // relax if original was large
		  if (fabs(maximumUp)>1.0e8)
		    newBound -= 1.0e-12*fabs(maximumUp);
		} else if (infiniteUpper==1&&nowUpper>large) {
		  newBound = (lower -maximumUp) / value;
		  // relax if original was large
		  if (fabs(maximumUp)>1.0e8)
		    newBound -= 1.0e-12*fabs(maximumUp);
		} else {
		  newBound = -COIN_DBL_MAX;
		}
		if (newBound > nowLower + 1.0e-12&&newBound>-large) {
		  // Tighten the lower bound 
		  numberChanged++;
		  // check infeasible (relaxed)
		  if (nowUpper < newBound) { 
		    if (nowUpper - newBound < 
			-100.0*tolerance) 
		      numberInfeasible++;
		    else 
		      newBound=nowUpper;
		  }
		  columnLower_[iColumn] = newBound;
		  // adjust
		  double now;
		  if (nowLower<-large) {
		    now=0.0;
		    infiniteLower--;
		  } else {
		    now = nowLower;
		  }
		  maximumDown += (newBound-now) * value;
		  nowLower = newBound;
#ifdef DEBUG
		  checkCorrect(this,iRow,
			       element, rowStart, rowLength,
			       column,
			       columnLower_,  columnUpper_,
			       infiniteUpper,
			       infiniteLower,
			       maximumUp,
			       maximumDown);
#endif
		}
	      } 
	      if (upper <large) {
		if (!infiniteLower) {
		  assert(nowLower >- large2);
		  newBound = nowLower + 
		    (upper - maximumDown) / value;
		  // relax if original was large
		  if (fabs(maximumDown)>1.0e8)
		    newBound += 1.0e-12*fabs(maximumDown);
		} else if (infiniteLower==1&&nowLower<-large) {
		  newBound =   (upper - maximumDown) / value;
		  // relax if original was large
		  if (fabs(maximumDown)>1.0e8)
		    newBound += 1.0e-12*fabs(maximumDown);
		} else {
		  newBound = COIN_DBL_MAX;
		}
		if (newBound < nowUpper - 1.0e-12&&newBound<large) {
		  // Tighten the upper bound 
		  numberChanged++;
		  // check infeasible (relaxed)
		  if (nowLower > newBound) { 
		    if (newBound - nowLower < 
			-100.0*tolerance) 
		      numberInfeasible++;
		    else 
		      newBound=nowLower;
		  }
		  columnUpper_[iColumn] = newBound;
		  // adjust 
		  double now;
		  if (nowUpper>large) {
		    now=0.0;
		    infiniteUpper--;
		  } else {
		    now = nowUpper;
		  }
		  maximumUp += (newBound-now) * value;
		  nowUpper = newBound;
#ifdef DEBUG
		  checkCorrect(this,iRow,
			       element, rowStart, rowLength,
			       column,
			       columnLower_,  columnUpper_,
			       infiniteUpper,
			       infiniteLower,
			       maximumUp,
			       maximumDown);
#endif
		}
	      }
	    } else {
	      // negative value
	      if (lower>-large) {
		if (!infiniteUpper) {
		  assert(nowLower < large2);
		  newBound = nowLower + 
		    (lower - maximumUp) / value;
		  // relax if original was large
		  if (fabs(maximumUp)>1.0e8)
		    newBound += 1.0e-12*fabs(maximumUp);
		} else if (infiniteUpper==1&&nowLower<-large) {
		  newBound = (lower -maximumUp) / value;
		  // relax if original was large
		  if (fabs(maximumUp)>1.0e8)
		    newBound += 1.0e-12*fabs(maximumUp);
		} else {
		  newBound = COIN_DBL_MAX;
		}
		if (newBound < nowUpper - 1.0e-12&&newBound<large) {
		  // Tighten the upper bound 
		  numberChanged++;
		  // check infeasible (relaxed)
		  if (nowLower > newBound) { 
		    if (newBound - nowLower < 
			-100.0*tolerance) 
		      numberInfeasible++;
		    else 
		      newBound=nowLower;
		  }
		  columnUpper_[iColumn] = newBound;
		  // adjust
		  double now;
		  if (nowUpper>large) {
		    now=0.0;
		    infiniteLower--;
		  } else {
		    now = nowUpper;
		  }
		  maximumDown += (newBound-now) * value;
		  nowUpper = newBound;
#ifdef DEBUG
		  checkCorrect(this,iRow,
			       element, rowStart, rowLength,
			       column,
			       columnLower_,  columnUpper_,
			       infiniteUpper,
			       infiniteLower,
			       maximumUp,
			       maximumDown);
#endif
		}
	      }
	      if (upper <large) {
		if (!infiniteLower) {
		  assert(nowUpper < large2);
		  newBound = nowUpper + 
		    (upper - maximumDown) / value;
		  // relax if original was large
		  if (fabs(maximumDown)>1.0e8)
		    newBound -= 1.0e-12*fabs(maximumDown);
		} else if (infiniteLower==1&&nowUpper>large) {
		  newBound =   (upper - maximumDown) / value;
		  // relax if original was large
		  if (fabs(maximumDown)>1.0e8)
		    newBound -= 1.0e-12*fabs(maximumDown);
		} else {
		  newBound = -COIN_DBL_MAX;
		}
		if (newBound > nowLower + 1.0e-12&&newBound>-large) {
		  // Tighten the lower bound 
		  numberChanged++;
		  // check infeasible (relaxed)
		  if (nowUpper < newBound) { 
		    if (nowUpper - newBound < 
			-100.0*tolerance) 
		      numberInfeasible++;
		    else 
		      newBound=nowUpper;
		  }
		  columnLower_[iColumn] = newBound;
		  // adjust
		  double now;
		  if (nowLower<-large) {
		    now=0.0;
		    infiniteUpper--;
		  } else {
		    now = nowLower;
		  }
		  maximumUp += (newBound-now) * value;
		  nowLower = newBound;
#ifdef DEBUG
		  checkCorrect(this,iRow,
			       element, rowStart, rowLength,
			       column,
			       columnLower_,  columnUpper_,
			       infiniteUpper,
			       infiniteLower,
			       maximumUp,
			       maximumDown);
#endif
		}
	      }
	    }
	  }
	}
      }
    }
    totalTightened += numberChanged;
    if (iPass==1)
      numberCheck=numberChanged>>4;
    if (numberInfeasible) break;
  }
  if (!numberInfeasible) {
    handler_->message(CLP_SIMPLEX_BOUNDTIGHTEN,messages_)
      <<totalTightened
      <<CoinMessageEol;
    // Set bounds slightly loose
    double useTolerance = 1.0e-3;
    if (doTight>0) {
      if (doTight>10) { 
        useTolerance=0.0;
      } else {
        while (doTight) {
          useTolerance *= 0.1;
          doTight--;
        }
      }
    }
    for (iColumn=0;iColumn<numberColumns_;iColumn++) {
      if (saveUpper[iColumn]>saveLower[iColumn]+useTolerance) {
        // Make large bounds stay infinite
        if (saveUpper[iColumn]>1.0e30&&columnUpper_[iColumn]>1.0e10) {
          columnUpper_[iColumn]=COIN_DBL_MAX;
        }
        if (saveLower[iColumn]<-1.0e30&&columnLower_[iColumn]<-1.0e10) {
          columnLower_[iColumn]=-COIN_DBL_MAX;
        }
#ifdef KEEP_GOING_IF_FIXED 
	double multiplier = 5.0e-3*floor(100.0*randomNumberGenerator_.randomDouble())+1.0;
	multiplier *= 100.0;
#else
	double multiplier = 100.0;
#endif
	if (columnUpper_[iColumn]-columnLower_[iColumn]<useTolerance+1.0e-8) {
	  // relax enough so will have correct dj
#if 1
	  columnLower_[iColumn]=CoinMax(saveLower[iColumn],
				    columnLower_[iColumn]-multiplier*useTolerance);
	  columnUpper_[iColumn]=CoinMin(saveUpper[iColumn],
				    columnUpper_[iColumn]+multiplier*useTolerance);
#else
	  if (fabs(columnUpper_[iColumn])<fabs(columnLower_[iColumn])) {
	    if (columnUpper_[iColumn]- multiplier*useTolerance>saveLower[iColumn]) {
	      columnLower_[iColumn]=columnUpper_[iColumn]-multiplier*useTolerance;
	    } else {
	      columnLower_[iColumn]=saveLower[iColumn];
	      columnUpper_[iColumn]=CoinMin(saveUpper[iColumn],
					saveLower[iColumn]+multiplier*useTolerance);
	    }
	  } else {
	    if (columnLower_[iColumn]+multiplier*useTolerance<saveUpper[iColumn]) {
	      columnUpper_[iColumn]=columnLower_[iColumn]+multiplier*useTolerance;
	    } else {
	      columnUpper_[iColumn]=saveUpper[iColumn];
	      columnLower_[iColumn]=CoinMax(saveLower[iColumn],
					saveUpper[iColumn]-multiplier*useTolerance);
	    }
	  }
#endif
	} else {
	  if (columnUpper_[iColumn]<saveUpper[iColumn]) {
	    // relax a bit
	    columnUpper_[iColumn] = CoinMin(columnUpper_[iColumn]+multiplier*useTolerance,
					saveUpper[iColumn]);
	  }
	  if (columnLower_[iColumn]>saveLower[iColumn]) {
	    // relax a bit
	    columnLower_[iColumn] = CoinMax(columnLower_[iColumn]-multiplier*useTolerance,
					saveLower[iColumn]);
	  }
	}
      }
    }
    if (tightIntegers&&integerType_) {
      for (iColumn=0;iColumn<numberColumns_;iColumn++) {
	if (integerType_[iColumn]) {
	  double value;
	  value = floor(columnLower_[iColumn]+0.5);
	  if (fabs(value-columnLower_[iColumn])>primalTolerance_)
	    value = ceil(columnLower_[iColumn]);
	  columnLower_[iColumn]=value;
	  value = floor(columnUpper_[iColumn]+0.5);
	  if (fabs(value-columnUpper_[iColumn])>primalTolerance_)
	    value = floor(columnUpper_[iColumn]);
	  columnUpper_[iColumn]=value;
	  if (columnLower_[iColumn]>columnUpper_[iColumn])
	    numberInfeasible++;
	}
      }
      if (numberInfeasible) {
	handler_->message(CLP_SIMPLEX_INFEASIBILITIES,messages_)
	  <<numberInfeasible
	  <<CoinMessageEol;
	// restore column bounds
 CoinMemcpyN(saveLower,numberColumns_,columnLower_);
 CoinMemcpyN(saveUpper,numberColumns_,columnUpper_);
      }
    }
  } else {
    handler_->message(CLP_SIMPLEX_INFEASIBILITIES,messages_)
      <<numberInfeasible
      <<CoinMessageEol;
    // restore column bounds
    CoinMemcpyN(saveLower,numberColumns_,columnLower_);
    CoinMemcpyN(saveUpper,numberColumns_,columnUpper_);
  }
  delete [] saveLower;
  delete [] saveUpper;
  return (numberInfeasible);
}
//#define SAVE_AND_RESTORE
// dual 
#include "ClpSimplexDual.hpp"
#include "ClpSimplexPrimal.hpp"
#ifndef SAVE_AND_RESTORE
int ClpSimplex::dual (int ifValuesPass , int startFinishOptions)
#else
int ClpSimplex::dual (int ifValuesPass , int startFinishOptions)
{
  // May be empty problem
  if (numberRows_&&numberColumns_) {
    // Save on file for debug
    int returnCode;
    returnCode = saveModel("debug.sav");
    if (returnCode) {
      printf("** Unable to save model to debug.sav\n");
      abort();
    }
    ClpSimplex temp;
    returnCode=temp.restoreModel("debug.sav");
    if (returnCode) {
      printf("** Unable to restore model from debug.sav\n");
      abort();
    }
    temp.setLogLevel(handler_->logLevel());
    // Now do dual
    returnCode=temp.dualDebug(ifValuesPass,startFinishOptions);
    // Move status and solution back
    int numberTotal = numberRows_+numberColumns_;
    CoinMemcpyN(temp.statusArray(),numberTotal,status_);
    CoinMemcpyN(temp.primalColumnSolution(),numberColumns_,columnActivity_);
    CoinMemcpyN(temp.primalRowSolution(),numberRows_,rowActivity_);
    CoinMemcpyN(temp.dualColumnSolution(),numberColumns_,reducedCost_);
    CoinMemcpyN(temp.dualRowSolution(),numberRows_,dual_);
    problemStatus_ = temp.problemStatus_;
    setObjectiveValue(temp.objectiveValue());
    setSumDualInfeasibilities(temp.sumDualInfeasibilities());
    setNumberDualInfeasibilities(temp.numberDualInfeasibilities());
    setSumPrimalInfeasibilities(temp.sumPrimalInfeasibilities());
    setNumberPrimalInfeasibilities(temp.numberPrimalInfeasibilities());
    setNumberIterations(temp.numberIterations());
    onStopped(); // set secondary status if stopped
    return returnCode;
  } else {
    // empty
    return dualDebug(ifValuesPass,startFinishOptions);
  }
}
int ClpSimplex::dualDebug (int ifValuesPass , int startFinishOptions)
#endif
{
  //double savedPivotTolerance = factorization_->pivotTolerance();
  int saveQuadraticActivated = 0;
  if (objective_) {
    saveQuadraticActivated = objective_->activated();
    objective_->setActivated(0);
  } else {
    // create dummy stuff
    assert (!numberColumns_);
    if (!numberRows_) 
      problemStatus_=0; // say optimal
    return 0;
  }
  ClpObjective * saveObjective = objective_;
  CoinAssert (ifValuesPass>=0&&ifValuesPass<3);
  /*  Note use of "down casting".  The only class the user sees is ClpSimplex.
      Classes ClpSimplexDual, ClpSimplexPrimal, (ClpSimplexNonlinear) 
      and ClpSimplexOther all exist and inherit from ClpSimplex but have no
      additional data and have no destructor or (non-default) constructor.

      This is to stop classes becoming too unwieldy and so I (JJF) can use e.g. "perturb"
      in primal and dual.

      As far as I can see this is perfectly safe.
  */
#ifdef COIN_DEVELOP
  //#define EXPENSIVE
#endif
#ifdef EXPENSIVE
  static int dualCount=0;
  static int dualCheckCount=-1;
  dualCount++;
  if (dualCount==dualCheckCount) {
    printf("Bad dual coming up\n");
  }
  ClpSimplex saveModel=*this;
#endif
  int returnCode = static_cast<ClpSimplexDual *> (this)->dual(ifValuesPass, startFinishOptions);
#ifdef EXPENSIVE
  if (problemStatus_==1) {
    saveModel.allSlackBasis(true);
    static_cast<ClpSimplexDual *> (&saveModel)->dual(0,0);
    if (saveModel.problemStatus_==0) {
      if (saveModel.objectiveValue()<dblParam_[0]-1.0e-8*(1.0+fabs(dblParam_[0]))) {
	if (objectiveValue()<dblParam_[0]-1.0e-6*(1.0+fabs(dblParam_[0]))) {
	  printf("BAD dual - objs %g ,savemodel %g cutoff %g at count %d\n",
		 objectiveValue(),saveModel.objectiveValue(),dblParam_[0],dualCount);
	  saveModel=*this;
	  saveModel.setLogLevel(63);
	  static_cast<ClpSimplexDual *> (&saveModel)->dual(0,0);
	  // flatten solution and try again
	  int iRow,iColumn;
	  for (iRow=0;iRow<numberRows_;iRow++) {
	    if (getRowStatus(iRow)!=basic) {
	      setRowStatus(iRow,superBasic);
	      // but put to bound if close
	      if (fabs(rowActivity_[iRow]-rowLower_[iRow])
		  <=primalTolerance_) {
		rowActivity_[iRow]=rowLower_[iRow];
		setRowStatus(iRow,atLowerBound);
	      } else if (fabs(rowActivity_[iRow]-rowUpper_[iRow])
			 <=primalTolerance_) {
		rowActivity_[iRow]=rowUpper_[iRow];
		setRowStatus(iRow,atUpperBound);
	      }
	    }
	  }
	  for (iColumn=0;iColumn<numberColumns_;iColumn++) {
	    if (getColumnStatus(iColumn)!=basic) {
	      setColumnStatus(iColumn,superBasic);
	      // but put to bound if close
	      if (fabs(columnActivity_[iColumn]-columnLower_[iColumn])
		  <=primalTolerance_) {
		columnActivity_[iColumn]=columnLower_[iColumn];
		setColumnStatus(iColumn,atLowerBound);
	      } else if (fabs(columnActivity_[iColumn]
			      -columnUpper_[iColumn])
			 <=primalTolerance_) {
		columnActivity_[iColumn]=columnUpper_[iColumn];
		setColumnStatus(iColumn,atUpperBound);
	      }
	    }
	  }
	  static_cast<ClpSimplexPrimal *> (&saveModel)->primal(0,0);
	} else {
	  printf("bad? dual - objs %g ,savemodel %g cutoff %g at count %d\n",
		 objectiveValue(),saveModel.objectiveValue(),dblParam_[0],dualCount);
	}
	if (dualCount>dualCheckCount&&dualCheckCount>=0)
	  abort();
      }
    }
  }
#endif
  //int lastAlgorithm = -1;
  if ((specialOptions_&2048)!=0&&problemStatus_==10&&!numberPrimalInfeasibilities_
      &&sumDualInfeasibilities_<1000.0*dualTolerance_&&perturbation_>=100)
    problemStatus_=0; // ignore
  if (problemStatus_==10) {
    //printf("Cleaning up with primal\n");
#ifdef COIN_DEVELOP
    int saveNumberIterations=numberIterations_;
#endif
    //lastAlgorithm=1;
    int savePerturbation = perturbation_;
    int saveLog = handler_->logLevel();
    //handler_->setLogLevel(63);
    perturbation_=100;
    bool denseFactorization = initialDenseFactorization();
    // It will be safe to allow dense
    setInitialDenseFactorization(true);
    // Allow for catastrophe
    int saveMax = intParam_[ClpMaxNumIteration];
    if (numberIterations_) {
      // normal
      if (intParam_[ClpMaxNumIteration]>100000+numberIterations_)
	intParam_[ClpMaxNumIteration] 
	  = numberIterations_ + 1000 + 2*numberRows_+numberColumns_;
    } else {
      // Not normal allow more
      baseIteration_ += 2*(numberRows_+numberColumns_);
    }
    // check which algorithms allowed
    int dummy;
    if (problemStatus_==10&&saveObjective==objective_)
      startFinishOptions |= 2;
    baseIteration_=numberIterations_;
    // Say second call
    moreSpecialOptions_ |= 256;
    if ((matrix_->generalExpanded(this,4,dummy)&1)!=0)
      returnCode = static_cast<ClpSimplexPrimal *> (this)->primal(1,startFinishOptions);
    else
      returnCode = static_cast<ClpSimplexDual *> (this)->dual(0,startFinishOptions);
    // Say not second call
    moreSpecialOptions_ &= ~256;
    baseIteration_=0;
    if (saveObjective != objective_) {
      // We changed objective to see if infeasible
      delete objective_;
      objective_=saveObjective;
      if (!problemStatus_) {
	// carry on
	returnCode = static_cast<ClpSimplexPrimal *> (this)->primal(1,startFinishOptions);
      }
    }
    if (problemStatus_==3&&numberIterations_<saveMax) {
#ifdef COIN_DEVELOP
      if (handler_->logLevel()>0)
	printf("looks like trouble - too many iterations in clean up - trying again\n");
#endif
      // flatten solution and try again
      int iRow,iColumn;
      for (iRow=0;iRow<numberRows_;iRow++) {
	if (getRowStatus(iRow)!=basic) {
	  setRowStatus(iRow,superBasic);
	  // but put to bound if close
	  if (fabs(rowActivity_[iRow]-rowLower_[iRow])
	      <=primalTolerance_) {
	    rowActivity_[iRow]=rowLower_[iRow];
	    setRowStatus(iRow,atLowerBound);
	  } else if (fabs(rowActivity_[iRow]-rowUpper_[iRow])
		     <=primalTolerance_) {
	    rowActivity_[iRow]=rowUpper_[iRow];
	    setRowStatus(iRow,atUpperBound);
	  }
	}
      }
      for (iColumn=0;iColumn<numberColumns_;iColumn++) {
	if (getColumnStatus(iColumn)!=basic) {
	  setColumnStatus(iColumn,superBasic);
	  // but put to bound if close
	  if (fabs(columnActivity_[iColumn]-columnLower_[iColumn])
	      <=primalTolerance_) {
	    columnActivity_[iColumn]=columnLower_[iColumn];
	    setColumnStatus(iColumn,atLowerBound);
	  } else if (fabs(columnActivity_[iColumn]
			  -columnUpper_[iColumn])
		     <=primalTolerance_) {
	    columnActivity_[iColumn]=columnUpper_[iColumn];
	    setColumnStatus(iColumn,atUpperBound);
	  }
	}
      }
      problemStatus_=-1;
      intParam_[ClpMaxNumIteration] = CoinMin(numberIterations_ + 1000 + 
					  2*numberRows_+numberColumns_,saveMax);
      perturbation_=savePerturbation;
      baseIteration_=numberIterations_;
      returnCode = static_cast<ClpSimplexPrimal *> (this)->primal(0);
      baseIteration_=0;
      computeObjectiveValue();
      // can't rely on djs either
      memset(reducedCost_,0,numberColumns_*sizeof(double));
#ifdef COIN_DEVELOP
      if (problemStatus_==3&&numberIterations_<saveMax&& 
	  handler_->logLevel()>0)
	printf("looks like real trouble - too many iterations in second clean up - giving up\n");
#endif
    }
    intParam_[ClpMaxNumIteration] = saveMax;

    setInitialDenseFactorization(denseFactorization);
    perturbation_=savePerturbation;
    if (problemStatus_==10) { 
      if (!numberPrimalInfeasibilities_)
        problemStatus_=0;
      else
        problemStatus_=4;
    }
    handler_->setLogLevel(saveLog);
#ifdef COIN_DEVELOP
    if (numberIterations_>200)
      printf("after primal status %d - %d iterations (save %d)\n",
	     problemStatus_,numberIterations_,saveNumberIterations);
#endif
  }
  objective_->setActivated(saveQuadraticActivated);
  //factorization_->pivotTolerance(savedPivotTolerance);
  onStopped(); // set secondary status if stopped
  //if (problemStatus_==1&&lastAlgorithm==1)
  //returnCode=10; // so will do primal after postsolve
  if (!problemStatus_) {
    //assert (!numberPrimalInfeasibilities_);
    //if (returnCode!=10)
    //assert (!numberDualInfeasibilities_);
  }
  //#define CLP_INVESTIGATE_OBJ
#ifdef CLP_INVESTIGATE_OBJ
  if (saveObjective != objective_) {
    // We changed objective to see if infeasible
    printf("ZZ DUAL objective_ %p saveObjective %p\n",
	   objective_,saveObjective);
    delete objective_;
    objective_=saveObjective;
  }
#endif
  return returnCode;
}
// primal 
int ClpSimplex::primal (int ifValuesPass , int startFinishOptions)
{
#ifdef CLP_INVESTIGATE_OBJ
  ClpObjective * saveObjective = objective_;
#endif
  //double savedPivotTolerance = factorization_->pivotTolerance();
#ifndef SLIM_CLP
  // See if nonlinear
  if (objective_->type()>1&&objective_->activated()) 
    return reducedGradient();
#endif  
  CoinAssert ((ifValuesPass>=0&&ifValuesPass<3)||
	      (ifValuesPass>=12&&ifValuesPass<100)||
	      (ifValuesPass>=112&&ifValuesPass<200));
  if (ifValuesPass>=12) {
    int numberProblems = (ifValuesPass-10)%100;
    ifValuesPass = (ifValuesPass<100) ? 1 : 2;
    // Go parallel to do solve
    // Only if all slack basis
    int i;
    for ( i=0;i<numberColumns_;i++) {
      if (getColumnStatus(i)==basic)
	break;
    }
    if (i==numberColumns_) {
      // try if vaguely feasible
      CoinZeroN(rowActivity_,numberRows_);
      const int * row = matrix_->getIndices();
      const CoinBigIndex * columnStart = matrix_->getVectorStarts();
      const int * columnLength = matrix_->getVectorLengths(); 
      const double * element = matrix_->getElements();
      for (int iColumn=0;iColumn<numberColumns_;iColumn++) {
	CoinBigIndex j;
	double value = columnActivity_[iColumn];
	if (value) {
	  CoinBigIndex start = columnStart[iColumn];
	  CoinBigIndex end = start + columnLength[iColumn];
	  for (j=start; j<end; j++) {
	    int iRow=row[j];
	    rowActivity_[iRow] += value*element[j];
	  }
	}
      }
      checkSolutionInternal();
      if (sumPrimalInfeasibilities_*sqrt(static_cast<double>(numberRows_))<1.0) {
	// Could do better if can decompose
	// correction to get feasible
	double scaleFactor = 1.0/numberProblems;
	double * correction = new double [numberRows_];
	for (int iRow=0;iRow<numberRows_;iRow++) {
	  double value=rowActivity_[iRow];
	  if (value>rowUpper_[iRow])
	    value = rowUpper_[iRow]-value;
	  else if (value<rowLower_[iRow])
	    value = rowLower_[iRow]-value;
	  else
	    value=0.0;
	  correction[iRow]=value*scaleFactor;
	}
	int numberColumns = (numberColumns_+numberProblems-1)/numberProblems;
	int * whichRows = new int [numberRows_];
	for (int i=0;i<numberRows_;i++)
	  whichRows[i]=i;
	int * whichColumns = new int [numberColumns_];
	ClpSimplex ** model = new ClpSimplex * [numberProblems];
	int startColumn=0;
	double * saveLower = CoinCopyOfArray(rowLower_,numberRows_);
	double * saveUpper = CoinCopyOfArray(rowUpper_,numberRows_);
	for (int i=0;i<numberProblems;i++) {
	  int endColumn = CoinMin(startColumn+numberColumns,numberColumns_);
	  CoinZeroN(rowActivity_,numberRows_);
	  for (int iColumn=startColumn;iColumn<endColumn;iColumn++) {
	    whichColumns[iColumn-startColumn]=iColumn;
	    CoinBigIndex j;
	    double value = columnActivity_[iColumn];
	    if (value) {
	      CoinBigIndex start = columnStart[iColumn];
	      CoinBigIndex end = start + columnLength[iColumn];
	      for (j=start; j<end; j++) {
		int iRow=row[j];
		rowActivity_[iRow] += value*element[j];
	      }
	    }
	  }
	  // adjust rhs
	  for (int iRow=0;iRow<numberRows_;iRow++) {
	    double value=rowActivity_[iRow]+correction[iRow];
	    if (saveUpper[iRow]<1.0e30)
	      rowUpper_[iRow]=value;
	    if (saveLower[iRow]>-1.0e30)
	      rowLower_[iRow]=value;
	  }
	  model[i] = new ClpSimplex(this,numberRows_,whichRows,
				    endColumn-startColumn,whichColumns);
	  //#define FEB_TRY
#ifdef FEB_TRY
	  model[i]->setPerturbation(perturbation_);
#endif
	  startColumn=endColumn;
	}
	memcpy(rowLower_,saveLower,numberRows_*sizeof(double));
	memcpy(rowUpper_,saveUpper,numberRows_*sizeof(double));
	delete [] saveLower;
	delete [] saveUpper;
	delete [] correction;
	// solve (in parallel)
	for (int i=0;i<numberProblems;i++) {
	  model[i]->primal(1/*ifValuesPass*/);
	}
	startColumn=0;
	int numberBasic=0;
	// use whichRows as counter
	for (int iRow=0;iRow<numberRows_;iRow++) {
	  int startValue=0;
	  if (rowUpper_[iRow]>rowLower_[iRow])
	    startValue++;
	  if (rowUpper_[iRow]>1.0e30)
	    startValue++;
	  if (rowLower_[iRow]<-1.0e30)
	    startValue++;
	  whichRows[iRow]=1000*startValue;
	}
	for (int i=0;i<numberProblems;i++) {
	  int endColumn = CoinMin(startColumn+numberColumns,numberColumns_);
	  ClpSimplex * simplex = model[i];
	  const double * solution = simplex->columnActivity_;
	  for (int iColumn=startColumn;iColumn<endColumn;iColumn++) {
	    columnActivity_[iColumn] = solution[iColumn-startColumn];
	    Status status = simplex->getColumnStatus(iColumn-startColumn);
	    setColumnStatus(iColumn,status);
	    if (status==basic)
	      numberBasic++;
	  }
	  for (int iRow=0;iRow<numberRows_;iRow++) {
	    if (simplex->getRowStatus(iRow)==basic)
	      whichRows[iRow]++;
	  }
	  delete model[i];
	  startColumn=endColumn;
	}
	delete [] model;
	for (int iRow=0;iRow<numberRows_;iRow++) 
	  setRowStatus(iRow,superBasic);
	CoinZeroN(rowActivity_,numberRows_);
	for (int iColumn=0;iColumn<numberColumns_;iColumn++) {
	  CoinBigIndex j;
	  double value = columnActivity_[iColumn];
	  if (value) {
	    CoinBigIndex start = columnStart[iColumn];
	    CoinBigIndex end = start + columnLength[iColumn];
	    for (j=start; j<end; j++) {
	      int iRow=row[j];
	      rowActivity_[iRow] += value*element[j];
	    }
	  }
	}
	checkSolutionInternal();
	if (numberBasic<numberRows_) {
	  int * order = new int [numberRows_];
	  for (int iRow=0;iRow<numberRows_;iRow++) {
	    setRowStatus(iRow,superBasic);
	    int nTimes = whichRows[iRow]%1000;
	    if (nTimes)
	      nTimes += whichRows[iRow]/500;
	    whichRows[iRow]=-nTimes;
	    order[iRow]=iRow;
	  }
	  CoinSort_2(whichRows,whichRows+numberRows_,order);
	  int nPut = numberRows_-numberBasic;
	  for (int i=0;i<nPut;i++) {
	    int iRow = order[i];
	    setRowStatus(iRow,basic);
	  }
	  delete [] order;
	} else if (numberBasic>numberRows_) {
	  double * away = new double [numberBasic];
	  numberBasic=0;
	  for (int iColumn=0;iColumn<numberColumns_;iColumn++) {
	    if (getColumnStatus(iColumn)==basic) {
	      double value = columnActivity_[iColumn];
	      value = CoinMin(value-columnLower_[iColumn],
			      columnUpper_[iColumn]-value);
	      away[numberBasic]=value;
	      whichColumns[numberBasic++]=iColumn;
	    }
	  }
	  CoinSort_2(away,away+numberBasic,whichColumns);
	  int nPut = numberBasic-numberRows_;
	  for (int i=0;i<nPut;i++) {
	    int iColumn = whichColumns[i];
	    double value = columnActivity_[iColumn];
	    if (value-columnLower_[iColumn]<
		columnUpper_[iColumn]-value)
	      setColumnStatus(iColumn,atLowerBound);
	    else
	      setColumnStatus(iColumn,atUpperBound);
	  }
	  delete [] away;
	}
	delete [] whichColumns;
	delete [] whichRows;
      }
    }
  }
  //firstFree_=-1;
  /*  Note use of "down casting".  The only class the user sees is ClpSimplex.
      Classes ClpSimplexDual, ClpSimplexPrimal, (ClpSimplexNonlinear) 
      and ClpSimplexOther all exist and inherit from ClpSimplex but have no
      additional data and have no destructor or (non-default) constructor.

      This is to stop classes becoming too unwieldy and so I (JJF) can use e.g. "perturb"
      in primal and dual.

      As far as I can see this is perfectly safe.
  */
  int returnCode = static_cast<ClpSimplexPrimal *> (this)->primal(ifValuesPass,startFinishOptions);
  //int lastAlgorithm=1;
  if (problemStatus_==10) {
    //lastAlgorithm=-1;
    //printf("Cleaning up with dual\n");
    int savePerturbation = perturbation_;
    perturbation_=100;
    bool denseFactorization = initialDenseFactorization();
    // It will be safe to allow dense
    setInitialDenseFactorization(true);
    // check which algorithms allowed
    int dummy;
    baseIteration_=numberIterations_;
    // Say second call
    moreSpecialOptions_ |= 256;
    if ((matrix_->generalExpanded(this,4,dummy)&2)!=0&&(specialOptions_&8192)==0) {
      double saveBound = dualBound_;
      // upperOut_ has largest away from bound
      dualBound_=CoinMin(CoinMax(2.0*upperOut_,1.0e8),dualBound_);
      returnCode = static_cast<ClpSimplexDual *> (this)->dual(0,startFinishOptions);
      dualBound_=saveBound;
    } else {
      returnCode = static_cast<ClpSimplexPrimal *> (this)->primal(0,startFinishOptions);
    }
    // Say not second call
    moreSpecialOptions_ &= ~256;
    baseIteration_=0;
    setInitialDenseFactorization(denseFactorization);
    perturbation_=savePerturbation;
    if (problemStatus_==10) {
      if (!numberPrimalInfeasibilities_)
        problemStatus_=0;
      else
        problemStatus_=4;
    }
  }
  //factorization_->pivotTolerance(savedPivotTolerance);
  onStopped(); // set secondary status if stopped
  //if (problemStatus_==1&&lastAlgorithm==1)
  //returnCode=10; // so will do primal after postsolve
#ifdef CLP_INVESTIGATE_OBJ
  if (saveObjective != objective_) {
    // We changed objective to see if infeasible
    printf("ZZ PRIMAL objective_ %p saveObjective %p\n",
	   objective_,saveObjective);
    delete objective_;
    objective_=saveObjective;
  }
#endif
  return returnCode;
}
#ifndef SLIM_CLP
#include "ClpQuadraticObjective.hpp"
/* Dual ranging.
   This computes increase/decrease in cost for each given variable and corresponding
   sequence numbers which would change basis.  Sequence numbers are 0..numberColumns 
   and numberColumns.. for artificials/slacks.
   For non-basic variables the sequence number will be that of the non-basic variables.
   
   Up to user to provide correct length arrays.
   
   Returns non-zero if infeasible unbounded etc
*/
#include "ClpSimplexOther.hpp"
int ClpSimplex::dualRanging(int numberCheck,const int * which,
			    double * costIncrease, int * sequenceIncrease,
			    double * costDecrease, int * sequenceDecrease,
			    double * valueIncrease, double * valueDecrease)
{
  int savePerturbation = perturbation_;
  perturbation_=100;
  int returnCode = static_cast<ClpSimplexPrimal *> (this)->primal(0,1);
  if (problemStatus_==10) {
    //printf("Cleaning up with dual\n");
    bool denseFactorization = initialDenseFactorization();
    // It will be safe to allow dense
    setInitialDenseFactorization(true);
    // check which algorithms allowed
    int dummy;
    if ((matrix_->generalExpanded(this,4,dummy)&2)!=0) {
      // upperOut_ has largest away from bound
      double saveBound=dualBound_;
      if (upperOut_>0.0)
	dualBound_=2.0*upperOut_;
      returnCode = static_cast<ClpSimplexDual *> (this)->dual(0,1);
      dualBound_=saveBound;
    } else {
      returnCode = static_cast<ClpSimplexPrimal *> (this)->primal(0,1);
    }
    setInitialDenseFactorization(denseFactorization);
    if (problemStatus_==10) 
      problemStatus_=0;
  }
  perturbation_=savePerturbation;
  if (problemStatus_||secondaryStatus_==6) {
    finish(); // get rid of arrays
    return 1; // odd status
  }
  static_cast<ClpSimplexOther *> (this)->dualRanging(numberCheck,which,
					  costIncrease,sequenceIncrease,
					  costDecrease,sequenceDecrease,
					  valueIncrease, valueDecrease);
  finish(); // get rid of arrays
  return 0;
}
/* Primal ranging.
   This computes increase/decrease in value for each given variable and corresponding
   sequence numbers which would change basis.  Sequence numbers are 0..numberColumns 
   and numberColumns.. for artificials/slacks.
   For basic variables the sequence number will be that of the basic variables.
   
   Up to user to providen correct length arrays.
   
   Returns non-zero if infeasible unbounded etc
*/
int ClpSimplex::primalRanging(int numberCheck,const int * which,
		  double * valueIncrease, int * sequenceIncrease,
		  double * valueDecrease, int * sequenceDecrease)
{
  int savePerturbation = perturbation_;
  perturbation_=100;
  int returnCode = static_cast<ClpSimplexPrimal *> (this)->primal(0,1);
  if (problemStatus_==10) {
    //printf("Cleaning up with dual\n");
    bool denseFactorization = initialDenseFactorization();
    // It will be safe to allow dense
    setInitialDenseFactorization(true);
    // check which algorithms allowed
    int dummy;
    if ((matrix_->generalExpanded(this,4,dummy)&2)!=0) {
      // upperOut_ has largest away from bound
      double saveBound=dualBound_;
      if (upperOut_>0.0)
	dualBound_=2.0*upperOut_;
      returnCode = static_cast<ClpSimplexDual *> (this)->dual(0,1);
      dualBound_=saveBound;
    } else {
      returnCode = static_cast<ClpSimplexPrimal *> (this)->primal(0,1);
    }
    setInitialDenseFactorization(denseFactorization);
    if (problemStatus_==10) 
      problemStatus_=0;
  }
  perturbation_=savePerturbation;
  if (problemStatus_||secondaryStatus_==6) {
    finish(); // get rid of arrays
    return 1; // odd status
  }
  static_cast<ClpSimplexOther *> (this)->primalRanging(numberCheck,which,
					  valueIncrease,sequenceIncrease,
					  valueDecrease,sequenceDecrease);
  finish(); // get rid of arrays
  return 0;
}
/* Write the basis in MPS format to the specified file.
   If writeValues true writes values of structurals
   (and adds VALUES to end of NAME card)
   
   Row and column names may be null.
   formatType is
   <ul>
   <li> 0 - normal
   <li> 1 - extra accuracy 
   <li> 2 - IEEE hex (later)
   </ul>
   
   Returns non-zero on I/O error
*/
int 
ClpSimplex::writeBasis(const char *filename,
			    bool writeValues,
			    int formatType) const
{
  return static_cast<const ClpSimplexOther *> (this)->writeBasis(filename,writeValues,
					 formatType);
}
// Read a basis from the given filename
int 
ClpSimplex::readBasis(const char *filename)
{
  return static_cast<ClpSimplexOther *> (this)->readBasis(filename);
}
#include "ClpSimplexNonlinear.hpp"
/* Solves nonlinear problem using SLP - may be used as crash
   for other algorithms when number of iterations small
*/
int 
ClpSimplex::nonlinearSLP(int numberPasses, double deltaTolerance)
{
  return static_cast<ClpSimplexNonlinear *> (this)->primalSLP(numberPasses,deltaTolerance);
}
/* Solves problem with nonlinear constraints using SLP - may be used as crash
   for other algorithms when number of iterations small.
   Also exits if all problematical variables are changing
   less than deltaTolerance
*/
int 
ClpSimplex::nonlinearSLP(int numberConstraints, ClpConstraint ** constraints,
		   int numberPasses,double deltaTolerance)
{
  return static_cast<ClpSimplexNonlinear *> (this)->primalSLP(numberConstraints,constraints,numberPasses,deltaTolerance);
}
// Solves non-linear using reduced gradient
int ClpSimplex::reducedGradient(int phase)
{
  if (objective_->type()<2||!objective_->activated()) {
    // no quadratic part
    return primal(0);
  }
  // get feasible
  if ((this->status()<0||numberPrimalInfeasibilities())&&phase==0) {
    objective_->setActivated(0);
    double saveDirection = optimizationDirection();
    setOptimizationDirection(0.0);
    primal(1);
    setOptimizationDirection(saveDirection);
    objective_->setActivated(1);
    // still infeasible
    if (numberPrimalInfeasibilities())
      return 0;
  }
  // Now enter method
  int returnCode = static_cast<ClpSimplexNonlinear *> (this)->primal();
  return returnCode;
}
#include "ClpPredictorCorrector.hpp"
#include "ClpCholeskyBase.hpp"
// Preference is WSSMP, UFL (just ordering), MUMPS, TAUCS then base
#if WSSMP_BARRIER
#include "ClpCholeskyWssmp.hpp"
#include "ClpCholeskyWssmpKKT.hpp"
#endif
#if UFL_BARRIER
#include "ClpCholeskyUfl.hpp"
#endif
#if MUMPS_BARRIER
#include "ClpCholeskyMumps.hpp"
#endif
#if TAUCS_BARRIER
#include "ClpCholeskyTaucs.hpp"
#endif
#include "ClpPresolve.hpp"
/* Solves using barrier (assumes you have good cholesky factor code).
   Does crossover to simplex if asked*/
int 
ClpSimplex::barrier(bool crossover)
{
  ClpSimplex * model2 = this;
  int savePerturbation=perturbation_;
  ClpInterior barrier;
  barrier.borrowModel(*model2);
  // See if quadratic objective
  ClpQuadraticObjective * quadraticObj = NULL;
  if (objective_->type()==2)
    quadraticObj = (static_cast< ClpQuadraticObjective*>(objective_));
  // If Quadratic we need KKT
  bool doKKT = (quadraticObj!=NULL);
  // Preference is WSSMP, UFL, MUMPS, TAUCS then base
#ifdef WSSMP_BARRIER
 if (!doKKT) {
   ClpCholeskyWssmp * cholesky = new ClpCholeskyWssmp(CoinMax(100,model2->numberRows()/10));
   barrier.setCholesky(cholesky);
 } else {
  //ClpCholeskyWssmp * cholesky = new ClpCholeskyWssmp();
   ClpCholeskyWssmpKKT * cholesky = new ClpCholeskyWssmpKKT(CoinMax(100,model2->numberRows()/10));
   barrier.setCholesky(cholesky);
 }
#elif UFL_BARRIER
 if (!doKKT) {
   ClpCholeskyUfl * cholesky = new ClpCholeskyUfl();
   barrier.setCholesky(cholesky);
 } else {
   ClpCholeskyBase * cholesky = new ClpCholeskyBase();
   // not yetClpCholeskyUfl * cholesky = new ClpCholeskyUfl();
   cholesky->setKKT(true);
   barrier.setCholesky(cholesky);
 }
#elif TAUCS_BARRIER
 assert (!doKKT);
 ClpCholeskyTaucs * cholesky = new ClpCholeskyTaucs();
 barrier.setCholesky(cholesky);
#elif MUMPS_BARRIER
 if (!doKKT) {
   ClpCholeskyMumps * cholesky = new ClpCholeskyMumps();
   barrier.setCholesky(cholesky);
 } else {
   printf("***** Unable to do Mumps with KKT\n");
   ClpCholeskyBase * cholesky = new ClpCholeskyBase();
   cholesky->setKKT(true);
   barrier.setCholesky(cholesky);
 }
#else
 if (!doKKT) {
  ClpCholeskyBase * cholesky = new ClpCholeskyBase();
  barrier.setCholesky(cholesky);
 } else {
   ClpCholeskyBase * cholesky = new ClpCholeskyBase();
   cholesky->setKKT(true);
   barrier.setCholesky(cholesky);
 }
#endif
  barrier.setDiagonalPerturbation(1.0e-14);
  int numberRows = model2->numberRows();
  int numberColumns = model2->numberColumns();
  int saveMaxIts = model2->maximumIterations();
  if (saveMaxIts<1000) {
    barrier.setMaximumBarrierIterations(saveMaxIts);
    model2->setMaximumIterations(1000000);
  }
  barrier.primalDual();
  int barrierStatus=barrier.status();
  double gap = static_cast<double>(barrier.complementarityGap());
  // get which variables are fixed
  double * saveLower=NULL;
  double * saveUpper=NULL;
  ClpPresolve pinfo2;
  ClpSimplex * saveModel2=NULL;
  int numberFixed = barrier.numberFixed();
  if (numberFixed*20>barrier.numberRows()&&numberFixed>5000&&crossover&&0) {
    // may as well do presolve
    int numberRows = barrier.numberRows();
    int numberColumns = barrier.numberColumns();
    int numberTotal = numberRows+numberColumns;
    saveLower = new double [numberTotal];
    saveUpper = new double [numberTotal];
    CoinMemcpyN(barrier.columnLower(),numberColumns,saveLower);
    CoinMemcpyN(barrier.rowLower(),numberRows,saveLower+numberColumns);
    CoinMemcpyN(barrier.columnUpper(),numberColumns,saveUpper);
    CoinMemcpyN(barrier.rowUpper(),numberRows,saveUpper+numberColumns);
    barrier.fixFixed();
    saveModel2=model2;
  }
  barrier.returnModel(*model2);
  double * rowPrimal = new double [numberRows];
  double * columnPrimal = new double [numberColumns];
  double * rowDual = new double [numberRows];
  double * columnDual = new double [numberColumns];
  // move solutions other way
  CoinMemcpyN(model2->primalRowSolution(),
	      numberRows,rowPrimal);
  CoinMemcpyN(model2->dualRowSolution(),
	      numberRows,rowDual);
  CoinMemcpyN(model2->primalColumnSolution(),
	      numberColumns,columnPrimal);
  CoinMemcpyN(model2->dualColumnSolution(),
	      numberColumns,columnDual);
  if (saveModel2) {
    // do presolve
    model2 = pinfo2.presolvedModel(*model2,1.0e-8,
				   false,5,true);
  }
  if (barrierStatus<4&&crossover) {
    // make sure no status left
    model2->createStatus();
    // solve
    model2->setPerturbation(100);
    // throw some into basis 
    {
      int numberRows = model2->numberRows();
      int numberColumns = model2->numberColumns();
      double * dsort = new double[numberColumns];
      int * sort = new int[numberColumns];
      int n=0;
      const double * columnLower = model2->columnLower();
      const double * columnUpper = model2->columnUpper();
      const double * primalSolution = model2->primalColumnSolution();
      double tolerance = 10.0*primalTolerance_;
      int i;
      for ( i=0;i<numberRows;i++) 
	model2->setRowStatus(i,superBasic);
      for ( i=0;i<numberColumns;i++) {
	double distance = CoinMin(columnUpper[i]-primalSolution[i],
			      primalSolution[i]-columnLower[i]);
	if (distance>tolerance) {
	  dsort[n]=-distance;
	  sort[n++]=i;
	  model2->setStatus(i,superBasic);
	} else if (distance>primalTolerance_) {
	  model2->setStatus(i,superBasic);
	} else if (primalSolution[i]<=columnLower[i]+primalTolerance_) {
	  model2->setStatus(i,atLowerBound);
	} else {
	  model2->setStatus(i,atUpperBound);
	}
      }
      CoinSort_2(dsort,dsort+n,sort);
      n = CoinMin(numberRows,n);
      for ( i=0;i<n;i++) {
	int iColumn = sort[i];
	model2->setStatus(iColumn,basic);
      }
      delete [] sort;
      delete [] dsort;
    }
    if (gap<1.0e-3*(static_cast<double> (numberRows+numberColumns))) {
      int numberRows = model2->numberRows();
      int numberColumns = model2->numberColumns();
      // just primal values pass
      double saveScale = model2->objectiveScale();
      model2->setObjectiveScale(1.0e-3);
      model2->primal(2);
      model2->setObjectiveScale(saveScale);
      // save primal solution and copy back dual
      CoinMemcpyN(model2->primalRowSolution(),
		  numberRows,rowPrimal);
      CoinMemcpyN(rowDual,
		  numberRows,model2->dualRowSolution());
      CoinMemcpyN(model2->primalColumnSolution(),
		  numberColumns,columnPrimal);
      CoinMemcpyN(columnDual,
		  numberColumns,model2->dualColumnSolution());
      //model2->primal(1);
      // clean up reduced costs and flag variables
      {
	double * dj = model2->dualColumnSolution();
	double * cost = model2->objective();
	double * saveCost = new double[numberColumns];
 CoinMemcpyN(cost,numberColumns,saveCost);
	double * saveLower = new double[numberColumns];
	double * lower = model2->columnLower();
 CoinMemcpyN(lower,numberColumns,saveLower);
	double * saveUpper = new double[numberColumns];
	double * upper = model2->columnUpper();
 CoinMemcpyN(upper,numberColumns,saveUpper);
	int i;
	double tolerance = 10.0*dualTolerance_;
	for ( i=0;i<numberColumns;i++) {
	  if (model2->getStatus(i)==basic) {
	    dj[i]=0.0;
	  } else if (model2->getStatus(i)==atLowerBound) {
	    if (optimizationDirection_*dj[i]<tolerance) {
	      if (optimizationDirection_*dj[i]<0.0) {
		//if (dj[i]<-1.0e-3)
		//printf("bad dj at lb %d %g\n",i,dj[i]);
		cost[i] -= dj[i];
		dj[i]=0.0;
	      }
	    } else {
	      upper[i]=lower[i];
	    }
	  } else if (model2->getStatus(i)==atUpperBound) {
	    if (optimizationDirection_*dj[i]>tolerance) {
	      if (optimizationDirection_*dj[i]>0.0) {
		//if (dj[i]>1.0e-3)
		//printf("bad dj at ub %d %g\n",i,dj[i]);
		cost[i] -= dj[i];
		dj[i]=0.0;
	      }
	    } else {
	      lower[i]=upper[i];
	    }
	  }
	}
	// just dual values pass
	//model2->setLogLevel(63);
	//model2->setFactorizationFrequency(1);
	model2->dual(2);
 CoinMemcpyN(saveCost,numberColumns,cost);
	delete [] saveCost;
 CoinMemcpyN(saveLower,numberColumns,lower);
	delete [] saveLower;
 CoinMemcpyN(saveUpper,numberColumns,upper);
	delete [] saveUpper;
      }
      // and finish
      // move solutions
      CoinMemcpyN(rowPrimal,
		  numberRows,model2->primalRowSolution());
      CoinMemcpyN(columnPrimal,
		  numberColumns,model2->primalColumnSolution());
    }
//     double saveScale = model2->objectiveScale();
//     model2->setObjectiveScale(1.0e-3);
//     model2->primal(2);
//    model2->setObjectiveScale(saveScale);
    model2->primal(1);
  } else if (barrierStatus==4&&crossover) {
    // memory problems
    model2->setPerturbation(savePerturbation);
    model2->createStatus();
    model2->dual();
  }
  model2->setMaximumIterations(saveMaxIts);
  delete [] rowPrimal;
  delete [] columnPrimal;
  delete [] rowDual;
  delete [] columnDual;
  if (saveLower) {
    pinfo2.postsolve(true);
    delete model2;
    model2=saveModel2;
    int numberRows = model2->numberRows();
    int numberColumns = model2->numberColumns();
    CoinMemcpyN(saveLower,numberColumns,model2->columnLower());
    CoinMemcpyN(saveLower+numberColumns,numberRows,model2->rowLower());
    delete [] saveLower;
    CoinMemcpyN(saveUpper,numberColumns,model2->columnUpper());
    CoinMemcpyN(saveUpper+numberColumns,numberRows,model2->rowUpper());
    delete [] saveUpper;
    model2->primal(1);
  }
  model2->setPerturbation(savePerturbation);
  return model2->status();
}
/* For strong branching.  On input lower and upper are new bounds
   while on output they are objective function values (>1.0e50 infeasible).
   Return code is 0 if nothing interesting, -1 if infeasible both
   ways and +1 if infeasible one way (check values to see which one(s))
*/
int ClpSimplex::strongBranching(int numberVariables,const int * variables,
				double * newLower, double * newUpper,
				double ** outputSolution,
				int * outputStatus, int * outputIterations,
				bool stopOnFirstInfeasible,
				bool alwaysFinish,
				int startFinishOptions)
{
  return static_cast<ClpSimplexDual *> (this)->strongBranching(numberVariables,variables,
						    newLower,  newUpper,outputSolution,
						    outputStatus, outputIterations,
						    stopOnFirstInfeasible,
						    alwaysFinish,startFinishOptions);
}
#endif
/* Borrow model.  This is so we dont have to copy large amounts
   of data around.  It assumes a derived class wants to overwrite
   an empty model with a real one - while it does an algorithm.
   This is same as ClpModel one, but sets scaling on etc. */
void 
ClpSimplex::borrowModel(ClpModel & otherModel) 
{
  ClpModel::borrowModel(otherModel);
  createStatus();
  //ClpDualRowSteepest steep1;
  //setDualRowPivotAlgorithm(steep1);
  //ClpPrimalColumnSteepest steep2;
  //setPrimalColumnPivotAlgorithm(steep2);
}
void 
ClpSimplex::borrowModel(ClpSimplex & otherModel) 
{
  ClpModel::borrowModel(otherModel);
  createStatus();
  dualBound_ = otherModel.dualBound_;
  dualTolerance_ = otherModel.dualTolerance_;
  primalTolerance_ = otherModel.primalTolerance_;
  delete dualRowPivot_;
  dualRowPivot_ = otherModel.dualRowPivot_->clone(true);
  dualRowPivot_->setModel(this);
  delete primalColumnPivot_;
  primalColumnPivot_ = otherModel.primalColumnPivot_->clone(true);
  primalColumnPivot_->setModel(this);
  perturbation_ = otherModel.perturbation_;
  moreSpecialOptions_ = otherModel.moreSpecialOptions_;
  automaticScale_ = otherModel.automaticScale_;
  maximumPerturbationSize_ = otherModel.maximumPerturbationSize_;
  perturbationArray_ = otherModel.perturbationArray_;
}
/// Saves scalars for ClpSimplex
typedef struct {
  double optimizationDirection;
  double dblParam[ClpLastDblParam];
  double objectiveValue;
  double dualBound;
  double dualTolerance;
  double primalTolerance;
  double sumDualInfeasibilities;
  double sumPrimalInfeasibilities;
  double infeasibilityCost;
  int numberRows;
  int numberColumns;
  int intParam[ClpLastIntParam];
  int numberIterations;
  int problemStatus;
  int maximumIterations;
  int lengthNames;
  int numberDualInfeasibilities;
  int numberDualInfeasibilitiesWithoutFree;
  int numberPrimalInfeasibilities;
  int numberRefinements;
  int scalingFlag;
  int algorithm;
  unsigned int specialOptions;
  int dualPivotChoice;
  int primalPivotChoice;
  int matrixStorageChoice;
} Clp_scalars;
#ifndef SLIM_NOIO
int outDoubleArray(double * array, int length, FILE * fp)
{
  int numberWritten;
  if (array&&length) {
    numberWritten = fwrite(&length,sizeof(int),1,fp);
    if (numberWritten!=1)
      return 1;
    numberWritten = fwrite(array,sizeof(double),length,fp);
    if (numberWritten!=length)
      return 1;
  } else {
    length = 0;
    numberWritten = fwrite(&length,sizeof(int),1,fp);
    if (numberWritten!=1)
      return 1;
  }
  return 0;
}
// Save model to file, returns 0 if success
int
ClpSimplex::saveModel(const char * fileName)
{
  FILE * fp = fopen(fileName,"wb");
  if (fp) {
    Clp_scalars scalars;
    CoinBigIndex numberWritten;
    // Fill in scalars
    scalars.optimizationDirection = optimizationDirection_;
    CoinMemcpyN( dblParam_,ClpLastDblParam,scalars.dblParam);
    scalars.objectiveValue = objectiveValue_;
    scalars.dualBound = dualBound_;
    scalars.dualTolerance = dualTolerance_;
    scalars.primalTolerance = primalTolerance_;
    scalars.sumDualInfeasibilities = sumDualInfeasibilities_;
    scalars.sumPrimalInfeasibilities = sumPrimalInfeasibilities_;
    scalars.infeasibilityCost = infeasibilityCost_;
    scalars.numberRows = numberRows_;
    scalars.numberColumns = numberColumns_;
    CoinMemcpyN( intParam_,ClpLastIntParam,scalars.intParam);
    scalars.numberIterations = numberIterations_;
    scalars.problemStatus = problemStatus_;
    scalars.maximumIterations = maximumIterations();
    scalars.lengthNames = lengthNames_;
    scalars.numberDualInfeasibilities = numberDualInfeasibilities_;
    scalars.numberDualInfeasibilitiesWithoutFree 
      = numberDualInfeasibilitiesWithoutFree_;
    scalars.numberPrimalInfeasibilities = numberPrimalInfeasibilities_;
    scalars.numberRefinements = numberRefinements_;
    scalars.scalingFlag = scalingFlag_;
    scalars.algorithm = algorithm_;
    scalars.specialOptions = specialOptions_;
    scalars.dualPivotChoice = dualRowPivot_->type();
    scalars.primalPivotChoice = primalColumnPivot_->type();
    scalars.matrixStorageChoice = matrix_->type();

    // put out scalars
    numberWritten = fwrite(&scalars,sizeof(Clp_scalars),1,fp);
    if (numberWritten!=1)
      return 1;
    CoinBigIndex length;
#ifndef CLP_NO_STD
    int i;
    // strings
    for (i=0;i<ClpLastStrParam;i++) {
      length = strParam_[i].size();
      numberWritten = fwrite(&length,sizeof(int),1,fp);
      if (numberWritten!=1)
	return 1;
      if (length) {
	numberWritten = fwrite(strParam_[i].c_str(),length,1,fp);
	if (numberWritten!=1)
	  return 1;
      }
    }
#endif
    // arrays - in no particular order
    if (outDoubleArray(rowActivity_,numberRows_,fp))
	return 1;
    if (outDoubleArray(columnActivity_,numberColumns_,fp))
	return 1;
    if (outDoubleArray(dual_,numberRows_,fp))
	return 1;
    if (outDoubleArray(reducedCost_,numberColumns_,fp))
	return 1;
    if (outDoubleArray(rowLower_,numberRows_,fp))
	return 1;
    if (outDoubleArray(rowUpper_,numberRows_,fp))
	return 1;
    if (outDoubleArray(objective(),numberColumns_,fp))
	return 1;
    if (outDoubleArray(rowObjective_,numberRows_,fp))
	return 1;
    if (outDoubleArray(columnLower_,numberColumns_,fp))
	return 1;
    if (outDoubleArray(columnUpper_,numberColumns_,fp))
	return 1;
    if (ray_) {
      if (problemStatus_==1) {
	if (outDoubleArray(ray_,numberRows_,fp))
	  return 1;
      } else if (problemStatus_==2) {
	if (outDoubleArray(ray_,numberColumns_,fp))
	  return 1;
      } else {
	if (outDoubleArray(NULL,0,fp))
	  return 1;
      }
    } else {
      if (outDoubleArray(NULL,0,fp))
	return 1;
    }
    if (status_&&(numberRows_+numberColumns_)>0) {
      length = numberRows_+numberColumns_;
      numberWritten = fwrite(&length,sizeof(int),1,fp);
      if (numberWritten!=1)
	return 1;
      numberWritten = fwrite(status_,sizeof(char),length, fp);
      if (numberWritten!=length)
	return 1;
    } else {
      length = 0;
      numberWritten = fwrite(&length,sizeof(int),1,fp);
      if (numberWritten!=1)
	return 1;
    }
#ifndef CLP_NO_STD
    if (lengthNames_) {
      char * array = 
	new char[CoinMax(numberRows_,numberColumns_)*(lengthNames_+1)];
      char * put = array;
      CoinAssert (numberRows_ == static_cast<int> (rowNames_.size()));
      for (i=0;i<numberRows_;i++) {
	assert(static_cast<int>(rowNames_[i].size())<=lengthNames_);
	strcpy(put,rowNames_[i].c_str());
	put += lengthNames_+1;
      }
      numberWritten = fwrite(array,lengthNames_+1,numberRows_,fp);
      if (numberWritten!=numberRows_)
	return 1;
      put=array;
      CoinAssert (numberColumns_ == static_cast<int> (columnNames_.size()));
      for (i=0;i<numberColumns_;i++) {
	assert(static_cast<int> (columnNames_[i].size())<=lengthNames_);
	strcpy(put,columnNames_[i].c_str());
	put += lengthNames_+1;
      }
      numberWritten = fwrite(array,lengthNames_+1,numberColumns_,fp);
      if (numberWritten!=numberColumns_)
	return 1;
      delete [] array;
    }
#endif
    // integers
    if (integerType_) {
      int marker=1;
      numberWritten=fwrite(&marker,sizeof(int),1,fp);
      numberWritten = fwrite(integerType_,1,numberColumns_,fp);
      if (numberWritten!=numberColumns_)
	return 1;
    } else {
      int marker=0;
      numberWritten=fwrite(&marker,sizeof(int),1,fp);
    }
    // just standard type at present
    assert (matrix_->type()==1);
    CoinAssert (matrix_->getNumCols() == numberColumns_);
    CoinAssert (matrix_->getNumRows() == numberRows_);
    // we are going to save with gaps
    length = matrix_->getVectorStarts()[numberColumns_-1]
      + matrix_->getVectorLengths()[numberColumns_-1];
    numberWritten = fwrite(&length,sizeof(int),1,fp);
    if (numberWritten!=1)
      return 1;
    numberWritten = fwrite(matrix_->getElements(),
			   sizeof(double),length,fp);
    if (numberWritten!=length)
      return 1;
    numberWritten = fwrite(matrix_->getIndices(),
			   sizeof(int),length,fp);
    if (numberWritten!=length)
      return 1;
    numberWritten = fwrite(matrix_->getVectorStarts(),
			   sizeof(int),numberColumns_+1,fp);
    if (numberWritten!=numberColumns_+1)
      return 1;
    numberWritten = fwrite(matrix_->getVectorLengths(),
			   sizeof(int),numberColumns_,fp);
    if (numberWritten!=numberColumns_)
      return 1;
    // finished
    fclose(fp);
    return 0;
  } else {
    return -1;
  }
}

int inDoubleArray(double * &array, int length, FILE * fp)
{
  int numberRead;
  int length2;
  numberRead = fread(&length2,sizeof(int),1,fp);
  if (numberRead!=1)
    return 1;
  if (length2) {
    // lengths must match
    if (length!=length2)
      return 2;
    array = new double[length];
    numberRead = fread(array,sizeof(double),length,fp);
    if (numberRead!=length)
      return 1;
  } 
  return 0;
}
/* Restore model from file, returns 0 if success,
   deletes current model */
int 
ClpSimplex::restoreModel(const char * fileName)
{
  FILE * fp = fopen(fileName,"rb");
  if (fp) {
    // Get rid of current model
    // save event handler in case already set
    ClpEventHandler * handler = eventHandler_->clone();
    ClpModel::gutsOfDelete(0);
    eventHandler_ = handler;
    gutsOfDelete(0);
    int i;
    for (i=0;i<6;i++) {
      rowArray_[i]=NULL;
      columnArray_[i]=NULL;
    }
    // get an empty factorization so we can set tolerances etc
    getEmptyFactorization();
    // Say sparse
    factorization_->sparseThreshold(1);
    Clp_scalars scalars;
    CoinBigIndex numberRead;

    // get scalars
    numberRead = fread(&scalars,sizeof(Clp_scalars),1,fp);
    if (numberRead!=1)
      return 1;
    // Fill in scalars
    optimizationDirection_ = scalars.optimizationDirection;
    CoinMemcpyN( scalars.dblParam,ClpLastDblParam,dblParam_);
    objectiveValue_ = scalars.objectiveValue;
    dualBound_ = scalars.dualBound;
    dualTolerance_ = scalars.dualTolerance;
    primalTolerance_ = scalars.primalTolerance;
    sumDualInfeasibilities_ = scalars.sumDualInfeasibilities;
    sumPrimalInfeasibilities_ = scalars.sumPrimalInfeasibilities;
    infeasibilityCost_ = scalars.infeasibilityCost;
    numberRows_ = scalars.numberRows;
    numberColumns_ = scalars.numberColumns;
    CoinMemcpyN( scalars.intParam,ClpLastIntParam,intParam_);
    numberIterations_ = scalars.numberIterations;
    problemStatus_ = scalars.problemStatus;
    setMaximumIterations(scalars.maximumIterations);
    lengthNames_ = scalars.lengthNames;
    numberDualInfeasibilities_ = scalars.numberDualInfeasibilities;
    numberDualInfeasibilitiesWithoutFree_ 
      = scalars.numberDualInfeasibilitiesWithoutFree;
    numberPrimalInfeasibilities_ = scalars.numberPrimalInfeasibilities;
    numberRefinements_ = scalars.numberRefinements;
    scalingFlag_ = scalars.scalingFlag;
    algorithm_ = scalars.algorithm;
    specialOptions_ = scalars.specialOptions;
    // strings
    CoinBigIndex length;
#ifndef CLP_NO_STD
    for (i=0;i<ClpLastStrParam;i++) {
      numberRead = fread(&length,sizeof(int),1,fp);
      if (numberRead!=1)
	return 1;
      if (length) {
	char * array = new char[length+1];
	numberRead = fread(array,length,1,fp);
	if (numberRead!=1)
	  return 1;
	array[length]='\0';
	strParam_[i]=array;
	delete [] array;
      }
    }
#endif
    // arrays - in no particular order
    if (inDoubleArray(rowActivity_,numberRows_,fp))
	return 1;
    if (inDoubleArray(columnActivity_,numberColumns_,fp))
	return 1;
    if (inDoubleArray(dual_,numberRows_,fp))
	return 1;
    if (inDoubleArray(reducedCost_,numberColumns_,fp))
	return 1;
    if (inDoubleArray(rowLower_,numberRows_,fp))
	return 1;
    if (inDoubleArray(rowUpper_,numberRows_,fp))
	return 1;
    double * objective=NULL;
    if (inDoubleArray(objective,numberColumns_,fp))
	return 1;
    delete objective_;
    objective_ = new ClpLinearObjective(objective,numberColumns_);
    delete [] objective;
    if (inDoubleArray(rowObjective_,numberRows_,fp))
	return 1;
    if (inDoubleArray(columnLower_,numberColumns_,fp))
	return 1;
    if (inDoubleArray(columnUpper_,numberColumns_,fp))
	return 1;
    if (problemStatus_==1) {
      if (inDoubleArray(ray_,numberRows_,fp))
	return 1;
    } else if (problemStatus_==2) {
      if (inDoubleArray(ray_,numberColumns_,fp))
	return 1;
    } else {
      // ray should be null
      numberRead = fread(&length,sizeof(int),1,fp);
      if (numberRead!=1)
	return 1;
      if (length)
	return 2;
    }
    delete [] status_;
    status_=NULL;
    // status region
    numberRead = fread(&length,sizeof(int),1,fp);
    if (numberRead!=1)
	return 1;
    if (length) {
      if (length!=numberRows_+numberColumns_)
	return 1;
      status_ = new char unsigned[length];
      numberRead = fread(status_,sizeof(char),length, fp);
      if (numberRead!=length)
	return 1;
    }
#ifndef CLP_NO_STD
    if (lengthNames_) {
      char * array = 
	new char[CoinMax(numberRows_,numberColumns_)*(lengthNames_+1)];
      char * get = array;
      numberRead = fread(array,lengthNames_+1,numberRows_,fp);
      if (numberRead!=numberRows_)
	return 1;
      rowNames_ = std::vector<std::string> ();
      rowNames_.resize(numberRows_);
      for (i=0;i<numberRows_;i++) {
	rowNames_.push_back(get);
	get += lengthNames_+1;
      }
      get = array;
      numberRead = fread(array,lengthNames_+1,numberColumns_,fp);
      if (numberRead!=numberColumns_)
	return 1;
      columnNames_ = std::vector<std::string> ();
      columnNames_.resize(numberColumns_);
      for (i=0;i<numberColumns_;i++) {
	columnNames_.push_back(get);
	get += lengthNames_+1;
      }
      delete [] array;
    }
#endif
    // integers
    int ifInteger;
    delete [] integerType_;
    numberRead = fread(&ifInteger,sizeof(int),1,fp);
    // But try and stay compatible with previous version
    bool alreadyGotLength=false;
    if (numberRead!=1)
      return 1;
    if (ifInteger==1) {
      integerType_ = new char [numberColumns_];
      numberRead = fread(integerType_,1,numberColumns_,fp);
      if (numberRead!=numberColumns_)
	return 1;
    } else {
      integerType_=NULL;
      if (ifInteger) {
	// probably old style save
	alreadyGotLength=true;
	length=ifInteger;
      }
    }
    // Pivot choices
    assert(scalars.dualPivotChoice>0&&(scalars.dualPivotChoice&63)<3);
    delete dualRowPivot_;
    switch ((scalars.dualPivotChoice&63)) {
    default:
      printf("Need another dualPivot case %d\n",scalars.dualPivotChoice&63);
    case 1:
      // Dantzig
      dualRowPivot_ = new ClpDualRowDantzig();
      break;
    case 2:
      // Steepest - use mode
      dualRowPivot_ = new ClpDualRowSteepest(scalars.dualPivotChoice>>6);
      break;
    }
    assert(scalars.primalPivotChoice>0&&(scalars.primalPivotChoice&63)<3);
    delete primalColumnPivot_;
    switch ((scalars.primalPivotChoice&63)) {
    default:
      printf("Need another primalPivot case %d\n",
	     scalars.primalPivotChoice&63);
    case 1:
      // Dantzig
      primalColumnPivot_ = new ClpPrimalColumnDantzig();
      break;
    case 2:
      // Steepest - use mode
      primalColumnPivot_ 
	= new ClpPrimalColumnSteepest(scalars.primalPivotChoice>>6);
      break;
    }
    assert(scalars.matrixStorageChoice==1);
    delete matrix_;
    // get arrays
    if (!alreadyGotLength) {
      numberRead = fread(&length,sizeof(int),1,fp);
      if (numberRead!=1)
	return 1;
    }
    double * elements = new double[length];
    int * indices = new int[length];
    CoinBigIndex * starts = new CoinBigIndex[numberColumns_+1];
    int * lengths = new int[numberColumns_];
    numberRead = fread(elements, sizeof(double),length,fp);
    if (numberRead!=length)
      return 1;
    numberRead = fread(indices, sizeof(int),length,fp);
    if (numberRead!=length)
      return 1;
    numberRead = fread(starts, sizeof(int),numberColumns_+1,fp);
    if (numberRead!=numberColumns_+1)
      return 1;
    numberRead = fread(lengths, sizeof(int),numberColumns_,fp);
    if (numberRead!=numberColumns_)
      return 1;
    // assign matrix
    CoinPackedMatrix * matrix = new CoinPackedMatrix();
    matrix->setExtraGap(0.0);
    matrix->setExtraMajor(0.0);
    // Pack down
    length=0;
    for (i=0;i<numberColumns_;i++) {
      int start = starts[i];
      starts[i]=length;
      for (CoinBigIndex j=start;j<start+lengths[i];j++) {
        elements[length]=elements[j];
        indices[length++]=indices[j];
      }
      lengths[i]=length-starts[i];
    }
    starts[numberColumns_]=length;
    matrix->assignMatrix(true, numberRows_, numberColumns_,
			 length, elements, indices, starts, lengths);
    // and transfer to Clp
    matrix_ = new ClpPackedMatrix(matrix);
    // finished
    fclose(fp);
    return 0;
  } else {
    return -1;
  }
  return 0;
}
#endif
// value of incoming variable (in Dual)
double 
ClpSimplex::valueIncomingDual() const
{
  // Need value of incoming for list of infeasibilities as may be infeasible
  double valueIncoming = (dualOut_/alpha_)*directionOut_;
  if (directionIn_==-1)
    valueIncoming = upperIn_-valueIncoming;
  else
    valueIncoming = lowerIn_-valueIncoming;
  return valueIncoming;
}
// Sanity check on input data - returns true if okay
bool 
ClpSimplex::sanityCheck()
{
  // bad if empty
  if (!numberColumns_||((!numberRows_||!matrix_->getNumElements())&&objective_->type()<2)) {
    int infeasNumber[2];
    double infeasSum[2];
    problemStatus_=emptyProblem(infeasNumber,infeasSum,false);
    numberDualInfeasibilities_=infeasNumber[0];
    sumDualInfeasibilities_=infeasSum[0];
    numberPrimalInfeasibilities_=infeasNumber[1];
    sumPrimalInfeasibilities_=infeasSum[1];
    return false;
  }
  int numberBad ;
  double largestBound, smallestBound, minimumGap;
  double smallestObj, largestObj;
  int firstBad;
  int modifiedBounds=0;
  int i;
  numberBad=0;
  firstBad=-1;
  minimumGap=1.0e100;
  smallestBound=1.0e100;
  largestBound=0.0;
  smallestObj=1.0e100;
  largestObj=0.0;
  // If bounds are too close - fix
  double fixTolerance = primalTolerance_;
  if (fixTolerance<2.0e-8)
    fixTolerance *= 1.1;
  for (i=numberColumns_;i<numberColumns_+numberRows_;i++) {
    double value;
    value = fabs(cost_[i]);
    if (value>1.0e50) {
      numberBad++;
      if (firstBad<0)
	firstBad=i;
    } else if (value) {
      if (value>largestObj)
	largestObj=value;
      if (value<smallestObj)
	smallestObj=value;
    }
    value=upper_[i]-lower_[i];
    if (value<-primalTolerance_) {
      numberBad++;
      if (firstBad<0)
	firstBad=i;
    } else if (value<=fixTolerance) {
      if (value) {
	// modify
	upper_[i] = lower_[i];
	modifiedBounds++;
      }
    } else {
      if (value<minimumGap)
	minimumGap=value;
    }
    if (lower_[i]>-1.0e100&&lower_[i]) {
      value = fabs(lower_[i]);
      if (value>largestBound)
	largestBound=value;
      if (value<smallestBound)
	smallestBound=value;
    }
    if (upper_[i]<1.0e100&&upper_[i]) {
      value = fabs(upper_[i]);
      if (value>largestBound)
	largestBound=value;
      if (value<smallestBound)
	smallestBound=value;
    }
  }
  if (largestBound)
    handler_->message(CLP_RIMSTATISTICS3,messages_)
      <<smallestBound
      <<largestBound
      <<minimumGap
      <<CoinMessageEol;
  minimumGap=1.0e100;
  smallestBound=1.0e100;
  largestBound=0.0;
  for (i=0;i<numberColumns_;i++) {
    double value;
    value = fabs(cost_[i]);
    if (value>1.0e50) {
      numberBad++;
      if (firstBad<0)
	firstBad=i;
    } else if (value) {
      if (value>largestObj)
	largestObj=value;
      if (value<smallestObj)
	smallestObj=value;
    }
    value=upper_[i]-lower_[i];
    if (value<-primalTolerance_) {
      numberBad++;
      if (firstBad<0)
	firstBad=i;
    } else if (value<=fixTolerance) {
      if (value) {
	// modify
	upper_[i] = lower_[i];
	modifiedBounds++;
      }
    } else {
      if (value<minimumGap)
	minimumGap=value;
    }
    if (lower_[i]>-1.0e100&&lower_[i]) {
      value = fabs(lower_[i]);
      if (value>largestBound)
	largestBound=value;
      if (value<smallestBound)
	smallestBound=value;
    }
    if (upper_[i]<1.0e100&&upper_[i]) {
      value = fabs(upper_[i]);
      if (value>largestBound)
	largestBound=value;
      if (value<smallestBound)
	smallestBound=value;
    }
  }
  char rowcol[]={'R','C'};
  if (numberBad) {
    handler_->message(CLP_BAD_BOUNDS,messages_)
      <<numberBad
      <<rowcol[isColumn(firstBad)]<<sequenceWithin(firstBad)
      <<CoinMessageEol;
    problemStatus_=4;
    return false;
  }
  if (modifiedBounds)
    handler_->message(CLP_MODIFIEDBOUNDS,messages_)
      <<modifiedBounds
      <<CoinMessageEol;
  handler_->message(CLP_RIMSTATISTICS1,messages_)
    <<smallestObj
    <<largestObj
    <<CoinMessageEol; 
  if (largestBound)
    handler_->message(CLP_RIMSTATISTICS2,messages_)
      <<smallestBound
      <<largestBound
      <<minimumGap
      <<CoinMessageEol;
  return true;
}
// Set up status array (for OsiClp)
void 
ClpSimplex::createStatus() 
{
  if(!status_)
    status_ = new unsigned char [numberColumns_+numberRows_];
  memset(status_,0,(numberColumns_+numberRows_)*sizeof(char));
  int i;
  // set column status to one nearest zero
  for (i=0;i<numberColumns_;i++) {
#if 0
    if (columnLower_[i]>=0.0) {
      setColumnStatus(i,atLowerBound);
    } else if (columnUpper_[i]<=0.0) {
      setColumnStatus(i,atUpperBound);
    } else if (columnLower_[i]<-1.0e20&&columnUpper_[i]>1.0e20) {
      // free
      setColumnStatus(i,isFree);
    } else if (fabs(columnLower_[i])<fabs(columnUpper_[i])) {
      setColumnStatus(i,atLowerBound);
    } else {
      setColumnStatus(i,atUpperBound);
    }
#else
    setColumnStatus(i,atLowerBound);
#endif
  }
  for (i=0;i<numberRows_;i++) {
    setRowStatus(i,basic);
  }
}
/* Sets up all slack basis and resets solution to 
   as it was after initial load or readMps */
void ClpSimplex::allSlackBasis(bool resetSolution)
{
  createStatus();
  if (resetSolution) {
    // put back to as it was originally
    int i;
    // set column status to one nearest zero
    // But set value to zero if lb <0.0 and ub>0.0
    for (i=0;i<numberColumns_;i++) {
      if (columnLower_[i]>=0.0) {
	columnActivity_[i]=columnLower_[i];
	setColumnStatus(i,atLowerBound);
      } else if (columnUpper_[i]<=0.0) {
	columnActivity_[i]=columnUpper_[i];
	setColumnStatus(i,atUpperBound);
      } else if (columnLower_[i]<-1.0e20&&columnUpper_[i]>1.0e20) {
	// free
	columnActivity_[i]=0.0;
	setColumnStatus(i,isFree);
      } else if (fabs(columnLower_[i])<fabs(columnUpper_[i])) {
	columnActivity_[i]=0.0;
	setColumnStatus(i,atLowerBound);
      } else {
	columnActivity_[i]=0.0;
	setColumnStatus(i,atUpperBound);
      }
    }
    if (solution_) {
      // do that as well
      if (!columnScale_) {
	for (i=0;i<numberColumns_;i++) {
	  solution_[i] = columnActivity_[i];
	}
      } else {
	double * inverseColumnScale=columnScale_+numberColumns_;
	for (i=0;i<numberColumns_;i++) {
	  solution_[i] = columnActivity_[i]*(rhsScale_*inverseColumnScale[i]);
	}
      }
    }
  }
}
/* Loads a problem (the constraints on the
   rows are given by lower and upper bounds). If a pointer is 0 then the
   following values are the default:
   <ul>
   <li> <code>colub</code>: all columns have upper bound infinity
   <li> <code>collb</code>: all columns have lower bound 0 
   <li> <code>rowub</code>: all rows have upper bound infinity
   <li> <code>rowlb</code>: all rows have lower bound -infinity
   <li> <code>obj</code>: all variables have 0 objective coefficient
   </ul>
*/
void 
ClpSimplex::loadProblem (  const ClpMatrixBase& matrix,
		    const double* collb, const double* colub,   
		    const double* obj,
		    const double* rowlb, const double* rowub,
		    const double * rowObjective)
{
  ClpModel::loadProblem(matrix, collb, colub, obj, rowlb, rowub,
			rowObjective);
  createStatus();
}
void 
ClpSimplex::loadProblem (  const CoinPackedMatrix& matrix,
		    const double* collb, const double* colub,   
		    const double* obj,
		    const double* rowlb, const double* rowub,
		    const double * rowObjective)
{
  ClpModel::loadProblem(matrix, collb, colub, obj, rowlb, rowub,
			rowObjective);
  createStatus();
}

/* Just like the other loadProblem() method except that the matrix is
   given in a standard column major ordered format (without gaps). */
void 
ClpSimplex::loadProblem (  const int numcols, const int numrows,
		    const CoinBigIndex* start, const int* index,
		    const double* value,
		    const double* collb, const double* colub,   
		    const double* obj,
		    const double* rowlb, const double* rowub,
		    const double * rowObjective)
{
  ClpModel::loadProblem(numcols, numrows, start, index, value,
			  collb, colub, obj, rowlb, rowub,
			  rowObjective);
  createStatus();
}
#ifndef SLIM_NOIO
// This loads a model from a coinModel object - returns number of errors
int 
ClpSimplex::loadProblem (  CoinModel & modelObject, bool /*keepSolution*/)
{
  unsigned char * status = NULL;
  double * psol = NULL;
  double * dsol = NULL;
  if (status_&&numberRows_&&numberRows_==modelObject.numberRows()&&
      numberColumns_==modelObject.numberColumns()) {
    status = new unsigned char [numberRows_+numberColumns_];
    CoinMemcpyN(status_,numberRows_+numberColumns_,status);
    psol = new double [numberRows_+numberColumns_];
    CoinMemcpyN(columnActivity_,numberColumns_,psol);
    CoinMemcpyN(rowActivity_,numberRows_,psol+numberColumns_);
    dsol = new double [numberRows_+numberColumns_];
    CoinMemcpyN(reducedCost_,numberColumns_,dsol);
    CoinMemcpyN(dual_,numberRows_,dsol+numberColumns_);
  }
  int returnCode = ClpModel::loadProblem(modelObject);
  const int * integerType = modelObject.integerTypeArray();
  if (integerType) {
    for (int iColumn=0;iColumn<numberColumns_;iColumn++) {
      if (integerType[iColumn])
	setInteger(iColumn);
    }
  }
  createStatus();
  if (status) {
    // copy back
    CoinMemcpyN(status,numberRows_+numberColumns_,status_);
    CoinMemcpyN(psol,numberColumns_,columnActivity_);
    CoinMemcpyN(psol+numberColumns_,numberRows_,rowActivity_);
    CoinMemcpyN(dsol,numberColumns_,reducedCost_);
    CoinMemcpyN(dsol+numberColumns_,numberRows_,dual_);
    delete [] status;
    delete [] psol;
    delete [] dsol;
  }
  optimizationDirection_ = modelObject.optimizationDirection();  
  return returnCode;
}
#endif
void 
ClpSimplex::loadProblem (  const int numcols, const int numrows,
			   const CoinBigIndex* start, const int* index,
			   const double* value,const int * length,
			   const double* collb, const double* colub,   
			   const double* obj,
			   const double* rowlb, const double* rowub,
			   const double * rowObjective)
{
  ClpModel::loadProblem(numcols, numrows, start, index, value, length,
			  collb, colub, obj, rowlb, rowub,
			  rowObjective);
  createStatus();
}
#ifndef SLIM_NOIO
// Read an mps file from the given filename
int 
ClpSimplex::readMps(const char *filename,
	    bool keepNames,
	    bool ignoreErrors)
{
  int status = ClpModel::readMps(filename,keepNames,ignoreErrors);
  createStatus();
  return status;
}
// Read GMPL files from the given filenames
int 
ClpSimplex::readGMPL(const char *filename,const char * dataName,
                     bool keepNames)
{
  int status = ClpModel::readGMPL(filename,dataName,keepNames);
  createStatus();
  return status;
}
// Read file in LP format from file with name filename. 
int 
ClpSimplex::readLp(const char *filename, const double epsilon )
{
  FILE *fp = fopen(filename, "r");

  if(!fp) {
    printf("### ERROR: ClpSimplex::readLp():  Unable to open file %s for reading\n",
	   filename);
    return(1);
  }
  CoinLpIO m;
  m.readLp(fp, epsilon);
  fclose(fp);
  
  // set problem name
  setStrParam(ClpProbName, m.getProblemName());
  // no errors
  loadProblem(*m.getMatrixByRow(), m.getColLower(), m.getColUpper(),
	      m.getObjCoefficients(), m.getRowLower(), m.getRowUpper());
  
  if (m.integerColumns()) {
    integerType_ = new char[numberColumns_];
    CoinMemcpyN(m.integerColumns(),numberColumns_,integerType_);
  } else {
    integerType_ = NULL;
  }
  createStatus();
  unsigned int maxLength=0;
  int iRow;
  rowNames_ = std::vector<std::string> ();
  columnNames_ = std::vector<std::string> ();
  rowNames_.reserve(numberRows_);
  for (iRow=0;iRow<numberRows_;iRow++) {
    const char * name = m.rowName(iRow);
    if (name) {
      maxLength = CoinMax(maxLength,static_cast<unsigned int> (strlen(name)));
      rowNames_.push_back(name);
    } else {
      rowNames_.push_back("");
    }
  }
  
  int iColumn;
  columnNames_.reserve(numberColumns_);
  for (iColumn=0;iColumn<numberColumns_;iColumn++) {
    const char * name = m.columnName(iColumn);
    if (name) {
      maxLength = CoinMax(maxLength,static_cast<unsigned int> (strlen(name)));
      columnNames_.push_back(name);
    } else {
      columnNames_.push_back("");
    }
  }
  lengthNames_=static_cast<int> (maxLength);
  
  return 0;
}
#endif
// Just check solution (for external use)
void 
ClpSimplex::checkSolution(int setToBounds)
{
  if (setToBounds) {
    // Set all ones that look at bounds to bounds
    bool changed=false;
    int i;
    for (i=0;i<numberRows_;i++) {
      double newValue=0.0;
      switch(getRowStatus(i)) {
        
      case basic:
        newValue = rowActivity_[i];
        break;
      case atUpperBound:
        newValue=rowUpper_[i];
        if (newValue>largeValue_) {
          if (rowLower_[i]>-largeValue_) {
            newValue=rowLower_[i];
            setRowStatus(i,atLowerBound);
          } else {
            // say free
            setRowStatus(i,isFree);
            newValue=0.0;
          }
        }
        break;
      case ClpSimplex::isFixed:
      case atLowerBound:
        newValue=rowLower_[i];
        if (newValue<-largeValue_) {
          if (rowUpper_[i]<largeValue_) {
            newValue=rowUpper_[i];
            setRowStatus(i,atUpperBound);
          } else {
            // say free
            setRowStatus(i,isFree);
            newValue=0.0;
          }
        }
        break;
      case isFree:
        newValue = rowActivity_[i];
        break;
        // not really free - fall through to superbasic
      case superBasic:
        if (rowUpper_[i]>largeValue_) {
          if (rowLower_[i]>-largeValue_) {
            newValue=rowLower_[i];
            setRowStatus(i,atLowerBound);
          } else {
            // say free
            setRowStatus(i,isFree);
            newValue=0.0;
          }
        } else {
          if (rowLower_[i]>-largeValue_) {
            // set to nearest
            if (fabs(newValue-rowLower_[i])
                <fabs(newValue-rowUpper_[i])) {
              newValue=rowLower_[i];
              setRowStatus(i,atLowerBound);
            } else {
              newValue=rowUpper_[i];
              setRowStatus(i,atUpperBound);
            }
          } else {
            newValue=rowUpper_[i];
            setRowStatus(i,atUpperBound);
          }
        }
        break;
      }
      if (fabs(newValue-rowActivity_[i])>1.0e-12) {
        changed=true;
        rowActivity_[i]=newValue;
      }
    }
    for (i=0;i<numberColumns_;i++) {
      double newValue=0.0;
      switch(getColumnStatus(i)) {
        
      case basic:
        newValue = columnActivity_[i];
        break;
      case atUpperBound:
        newValue=columnUpper_[i];
        if (newValue>largeValue_) {
          if (columnLower_[i]>-largeValue_) {
            newValue=columnLower_[i];
            setColumnStatus(i,atLowerBound);
          } else {
            // say free
            setColumnStatus(i,isFree);
            newValue=0.0;
          }
        }
        break;
      case ClpSimplex::isFixed:
      case atLowerBound:
        newValue=columnLower_[i];
        if (newValue<-largeValue_) {
          if (columnUpper_[i]<largeValue_) {
            newValue=columnUpper_[i];
            setColumnStatus(i,atUpperBound);
          } else {
            // say free
            setColumnStatus(i,isFree);
            newValue=0.0;
          }
        }
        break;
      case isFree:
        newValue = columnActivity_[i];
        break;
        // not really free - fall through to superbasic
      case superBasic:
        if (columnUpper_[i]>largeValue_) {
          if (columnLower_[i]>-largeValue_) {
            newValue=columnLower_[i];
            setColumnStatus(i,atLowerBound);
          } else {
            // say free
            setColumnStatus(i,isFree);
            newValue=0.0;
          }
        } else {
          if (columnLower_[i]>-largeValue_) {
            // set to nearest
            if (fabs(newValue-columnLower_[i])
                <fabs(newValue-columnUpper_[i])) {
              newValue=columnLower_[i];
              setColumnStatus(i,atLowerBound);
            } else {
              newValue=columnUpper_[i];
              setColumnStatus(i,atUpperBound);
            }
          } else {
            newValue=columnUpper_[i];
            setColumnStatus(i,atUpperBound);
          }
        }
        break;
      }
      if (fabs(newValue-columnActivity_[i])>1.0e-12) {
        changed=true;
        columnActivity_[i]=newValue;
      }
    }
    if (!changed&&setToBounds==1) 
      // no need to do anything
      setToBounds=0;
  }
  if (!setToBounds) {
    // Just use column solution
    CoinZeroN(rowActivity_,numberRows_);
    matrix()->times(columnActivity_,rowActivity_) ;
    // put in standard form
    createRim(7+8+16+32);
    dualTolerance_=dblParam_[ClpDualTolerance];
    primalTolerance_=dblParam_[ClpPrimalTolerance];
    checkPrimalSolution( rowActivityWork_, columnActivityWork_);
    checkDualSolution();
  } else {
    startup(0,0);
    gutsOfSolution(NULL,NULL);
  }
  if (!numberDualInfeasibilities_&&
      !numberPrimalInfeasibilities_)
    problemStatus_=0;
  else
    problemStatus_=-1;
#ifdef CLP_DEBUG
  int i;
  double value=0.0;
  for (i=0;i<numberRows_+numberColumns_;i++)
    value += dj_[i]*solution_[i];
  printf("dual value %g, primal %g\n",value,objectiveValue());
#endif
  // release extra memory
  deleteRim(0);
}
/* Crash - at present just aimed at dual, returns
   -2 if dual preferred and crash basis created
   -1 if dual preferred and all slack basis preferred
   0 if basis going in was not all slack
   1 if primal preferred and all slack basis preferred
   2 if primal preferred and crash basis created.
   
   if gap between bounds <="gap" variables can be flipped
   ( If pivot -1 then can be made super basic!)
   
   If "pivot" is
   -1 No pivoting - always primal
   0 No pivoting (so will just be choice of algorithm)
   1 Simple pivoting e.g. gub
   2 Mini iterations
   3 Just throw all free variables in basis
*/
int 
ClpSimplex::crash(double gap,int pivot)
{
  //CoinAssert(!rowObjective_); // not coded
  int iColumn;
  int numberBad=0;
  int numberBasic=0;
  double dualTolerance=dblParam_[ClpDualTolerance];
  //double primalTolerance=dblParam_[ClpPrimalTolerance];
  int returnCode=0;
  // If no basis then make all slack one
  if (!status_)
    createStatus();

  for (iColumn=0;iColumn<numberColumns_;iColumn++) {
    if (getColumnStatus(iColumn)==basic)
      numberBasic++;
  }
  if (!numberBasic||pivot==3) {
    if (pivot==3) {
      // Just throw all free variables in basis
      for (int iRow=0;iRow<numberRows_;iRow++) {
        if (fabs(rowLower_[iRow])<fabs(rowUpper_[iRow]))
          setRowStatus(iRow,atLowerBound);
        else
          setRowStatus(iRow,atUpperBound);
      }
      for (int iColumn=0;iColumn<numberColumns_;iColumn++) {
        if (columnLower_[iColumn]<-1.0e20&&columnUpper_[iColumn]>1.0e20)
          setColumnStatus(iColumn,basic);
      }
      return 0;
    }
    // all slack
    double * dj = new double [numberColumns_];
    double * solution = columnActivity_;
    const double * linearObjective = objective();
    //double objectiveValue=0.0;
    int iColumn;
    double direction = optimizationDirection_;
    // direction is actually scale out not scale in
    if (direction)
      direction = 1.0/direction;
    for (iColumn=0;iColumn<numberColumns_;iColumn++)
      dj[iColumn] = direction*linearObjective[iColumn];
    for (iColumn=0;iColumn<numberColumns_;iColumn++) {
      // assume natural place is closest to zero
      double lowerBound = columnLower_[iColumn];
      double upperBound = columnUpper_[iColumn];
      if (lowerBound>-1.0e20||upperBound<1.0e20) {
	bool atLower;
	if (fabs(upperBound)<fabs(lowerBound)) {
	  atLower=false;
	  setColumnStatus(iColumn,atUpperBound);
	  solution[iColumn]=upperBound;
	} else {
	  atLower=true;
	  setColumnStatus(iColumn,atLowerBound);
	  solution[iColumn]=lowerBound;
	}
	if (dj[iColumn]<-dualTolerance_) {
	  // should be at upper bound
	  if (atLower) {
	    // can we flip
	    if (upperBound-lowerBound<=gap) {
	      columnActivity_[iColumn]=upperBound;
	      setColumnStatus(iColumn,atUpperBound);
	    } else if (pivot<0) {
	      // set superbasic
	      columnActivity_[iColumn]=lowerBound+gap;
	      setColumnStatus(iColumn,superBasic);
	    } else if (dj[iColumn]<-dualTolerance) {
	      numberBad++;
	    }
	  }
	} else if (dj[iColumn]>dualTolerance_) {
	  // should be at lower bound
	  if (!atLower) {
	    // can we flip
	    if (upperBound-lowerBound<=gap) {
	      columnActivity_[iColumn]=lowerBound;
	      setColumnStatus(iColumn,atLowerBound);
	    } else if (pivot<0) {
	      // set superbasic
	      columnActivity_[iColumn]=upperBound-gap;
	      setColumnStatus(iColumn,superBasic);
	    } else if (dj[iColumn]>dualTolerance) {
	      numberBad++;
	    }
	  }
	}
      } else {
	// free
	setColumnStatus(iColumn,isFree);
	if (fabs(dj[iColumn])>dualTolerance) 
	  numberBad++;
      }
    }
    if (numberBad||pivot) {
      if (pivot<=0) {
	delete [] dj;
	returnCode = 1;
      } else {
	// see if can be made dual feasible with gubs etc
	double * pi = new double[numberRows_];
	memset (pi,0,numberRows_*sizeof(double));
	int * way = new int[numberColumns_];
	int numberIn = 0;

	// Get column copy
	CoinPackedMatrix * columnCopy = matrix();
	// Get a row copy in standard format
	CoinPackedMatrix copy;
	copy.setExtraGap(0.0);
	copy.setExtraMajor(0.0);
	copy.reverseOrderedCopyOf(*columnCopy);
	// get matrix data pointers
	const int * column = copy.getIndices();
	const CoinBigIndex * rowStart = copy.getVectorStarts();
	const int * rowLength = copy.getVectorLengths(); 
	const double * elementByRow = copy.getElements();
	//const int * row = columnCopy->getIndices();
	//const CoinBigIndex * columnStart = columnCopy->getVectorStarts();
	//const int * columnLength = columnCopy->getVectorLengths(); 
	//const double * element = columnCopy->getElements();


	// if equality row and bounds mean artificial in basis bad
	// then do anyway

	for (iColumn=0;iColumn<numberColumns_;iColumn++) {
	  // - if we want to reduce dj, + if we want to increase
	  int thisWay = 100;
	  double lowerBound = columnLower_[iColumn];
	  double upperBound = columnUpper_[iColumn];
	  if (upperBound>lowerBound) {
	    switch(getColumnStatus(iColumn)) {
	      
	    case basic:
	      thisWay=0;
	    case ClpSimplex::isFixed:
	      break;
	    case isFree:
	    case superBasic:
	      if (dj[iColumn]<-dualTolerance) 
		thisWay = 1;
	      else if (dj[iColumn]>dualTolerance) 
		thisWay = -1;
	      else
		thisWay =0;
	      break;
	    case atUpperBound:
	      if (dj[iColumn]>dualTolerance) 
		thisWay = -1;
	      else if (dj[iColumn]<-dualTolerance) 
		thisWay = -3;
	      else
		thisWay = -2;
	      break;
	    case atLowerBound:
	      if (dj[iColumn]<-dualTolerance) 
		thisWay = 1;
	      else if (dj[iColumn]>dualTolerance) 
		thisWay = 3;
	      else
		thisWay = 2;
	      break;
	    }
	  }
	  way[iColumn] = thisWay;
	}
	/*if (!numberBad)
	  printf("Was dual feasible before passes - rows %d\n",
	  numberRows_);*/
	int lastNumberIn = -100000;
	int numberPasses=5;
	while (numberIn>lastNumberIn+numberRows_/100) {
	  lastNumberIn = numberIn;
	  // we need to maximize chance of doing good
	  int iRow;
	  for (iRow=0;iRow<numberRows_;iRow++) {
	    double lowerBound = rowLower_[iRow];
	    double upperBound = rowUpper_[iRow];
	    if (getRowStatus(iRow)==basic) {
	      // see if we can find a column to pivot on
	      int j;
	      // down is amount pi can go down
	      double maximumDown = COIN_DBL_MAX;
	      double maximumUp = COIN_DBL_MAX;
	      double minimumDown =0.0;
	      double minimumUp =0.0;
	      int iUp=-1;
	      int iDown=-1;
	      int iUpB=-1;
	      int iDownB=-1;
	      if (lowerBound<-1.0e20)
		maximumUp = -1.0;
	      if (upperBound>1.0e20)
		maximumDown = -1.0;
	      for (j=rowStart[iRow];j<rowStart[iRow]+rowLength[iRow];j++) {
		int iColumn = column[j];
		double value = elementByRow[j];
		double djValue = dj[iColumn];
		/* way -
		   -3 - okay at upper bound with negative dj
		   -2 - marginal at upper bound with zero dj - can only decrease
		   -1 - bad at upper bound
		   0 - we can never pivot on this row
		   1 - bad at lower bound
		   2 - marginal at lower bound with zero dj - can only increase
		   3 - okay at lower bound with positive dj
		   100 - fine we can just ignore
		*/
		if (way[iColumn]!=100) {
		  switch(way[iColumn]) {
		    
		  case -3:
		    if (value>0.0) {
		      if (maximumDown*value>-djValue) {
			maximumDown = -djValue/value;
			iDown = iColumn;
		      }
		    } else {
		      if (-maximumUp*value>-djValue) {
			maximumUp = djValue/value;
			iUp = iColumn;
		      }
		    }
		    break;
		  case -2:
		    if (value>0.0) {
		      maximumDown = 0.0;
		    } else {
		      maximumUp = 0.0;
		    }
		    break;
		  case -1:
		    // see if could be satisfied
		    // dj value > 0
		    if (value>0.0) {
		      maximumDown=0.0;
		      if (maximumUp*value<djValue-dualTolerance) {
			maximumUp = 0.0; // would improve but not enough
		      } else {
			if (minimumUp*value<djValue) {
			  minimumUp = djValue/value;
			  iUpB = iColumn;
			}
		      }
		    } else {
		      maximumUp=0.0;
		      if (-maximumDown*value<djValue-dualTolerance) {
			maximumDown = 0.0; // would improve but not enough
		      } else {
			if (-minimumDown*value<djValue) {
			  minimumDown = -djValue/value;
			  iDownB = iColumn;
			}
		      }
		    }
		    
		    break;
		  case 0:
		    maximumDown = -1.0;
		    maximumUp=-1.0;
		    break;
		  case 1:
		    // see if could be satisfied
		    // dj value < 0
		    if (value>0.0) {
		      maximumUp=0.0;
		      if (maximumDown*value<-djValue-dualTolerance) {
			maximumDown = 0.0; // would improve but not enough
		      } else {
			if (minimumDown*value<-djValue) {
			  minimumDown = -djValue/value;
			  iDownB = iColumn;
			}
		      }
		    } else {
		      maximumDown=0.0;
		      if (-maximumUp*value<-djValue-dualTolerance) {
			maximumUp = 0.0; // would improve but not enough
		      } else {
			if (-minimumUp*value<-djValue) {
			  minimumUp = djValue/value;
			  iUpB = iColumn;
			}
		      }
		    }
		    
		    break;
		  case 2:
		    if (value>0.0) {
		      maximumUp = 0.0;
		    } else {
		      maximumDown = 0.0;
		    }
		    
		    break;
		  case 3:
		    if (value>0.0) {
		      if (maximumUp*value>djValue) {
			maximumUp = djValue/value;
			iUp = iColumn;
		      }
		    } else {
		      if (-maximumDown*value>djValue) {
			maximumDown = -djValue/value;
			iDown = iColumn;
		      }
		    }
		    
		    break;
		  default:
		    break;
		  }
		}
	      }
	      if (iUpB>=0)
		iUp=iUpB;
	      if (maximumUp<=dualTolerance||maximumUp<minimumUp)
		iUp=-1;
	      if (iDownB>=0)
		iDown=iDownB;
	      if (maximumDown<=dualTolerance||maximumDown<minimumDown)
		iDown=-1;
	      if (iUp>=0||iDown>=0) {
		// do something
		if (iUp>=0&&iDown>=0) {
		  if (maximumDown>maximumUp)
		    iUp=-1;
		}
		double change;
		int kColumn;
		if (iUp>=0) {
		  kColumn=iUp;
		  change=maximumUp;
		  // just do minimum if was dual infeasible
		  // ? only if maximum large?
		  if (minimumUp>0.0)
		    change=minimumUp;
		  setRowStatus(iRow,atUpperBound);
		} else {
		  kColumn=iDown;
		  change=-maximumDown;
		  // just do minimum if was dual infeasible
		  // ? only if maximum large?
		  if (minimumDown>0.0)
		    change=-minimumDown;
		  setRowStatus(iRow,atLowerBound);
		}
		assert (fabs(change)<1.0e200);
		setColumnStatus(kColumn,basic);
		numberIn++;
		pi[iRow]=change;
		for (j=rowStart[iRow];j<rowStart[iRow]+rowLength[iRow];j++) {
		  int iColumn = column[j];
		  double value = elementByRow[j];
		  double djValue = dj[iColumn]-change*value;
		  dj[iColumn]=djValue;
		  if (abs(way[iColumn])==1) {
		    numberBad--;
		    /*if (!numberBad)
		      printf("Became dual feasible at row %d out of %d\n",
		      iRow, numberRows_);*/
		    lastNumberIn=-1000000;
		  }
		  int thisWay = 100;
		  double lowerBound = columnLower_[iColumn];
		  double upperBound = columnUpper_[iColumn];
		  if (upperBound>lowerBound) {
		    switch(getColumnStatus(iColumn)) {
		      
		    case basic:
		      thisWay=0;
		    case isFixed:
		      break;
		    case isFree:
		    case superBasic:
		      if (djValue<-dualTolerance) 
			thisWay = 1;
		      else if (djValue>dualTolerance) 
			thisWay = -1;
		      else
			{ thisWay =0; }
		      break;
		    case atUpperBound:
		      if (djValue>dualTolerance) 
			{ thisWay =-1; }
		      else if (djValue<-dualTolerance) 
			thisWay = -3;
		      else
			thisWay = -2;
		      break;
		    case atLowerBound:
		      if (djValue<-dualTolerance) 
			{ thisWay =1; }
		      else if (djValue>dualTolerance) 
			thisWay = 3;
		      else
			thisWay = 2;
		      break;
		    }
		  }
		  way[iColumn] = thisWay;
		}
	      }
	    }
	  }
	  if (numberIn==lastNumberIn||numberBad||pivot<2)
	    break;
	  if (!(--numberPasses))
	    break;
	  //printf("%d put in so far\n",numberIn);
	}
	// last attempt to flip
	for (iColumn=0;iColumn<numberColumns_;iColumn++) {
	  double lowerBound = columnLower_[iColumn];
	  double upperBound = columnUpper_[iColumn];
	  if (upperBound-lowerBound<=gap&&upperBound>lowerBound) {
	    double djValue=dj[iColumn];
	    switch(getColumnStatus(iColumn)) {
	      
	    case basic:
	    case ClpSimplex::isFixed:
	      break;
	    case isFree:
	    case superBasic:
	      break;
	    case atUpperBound:
	      if (djValue>dualTolerance) {
		setColumnStatus(iColumn,atUpperBound);
		solution[iColumn]=upperBound;
	      } 
	      break;
	    case atLowerBound:
	      if (djValue<-dualTolerance) {
		setColumnStatus(iColumn,atUpperBound);
		solution[iColumn]=upperBound;
	      }
	      break;
	    }
	  }
	}
	delete [] pi;
	delete [] dj;
	delete [] way;
	handler_->message(CLP_CRASH,messages_)
	  <<numberIn
	  <<numberBad
	  <<CoinMessageEol;
	returnCode =  -1;
      }
    } else {
      delete [] dj;
      returnCode =  -1;
    }
    //cleanStatus();
  }
  return returnCode;
}
/* Pivot in a variable and out a variable.  Returns 0 if okay,
   1 if inaccuracy forced re-factorization, -1 if would be singular.
   Also updates primal/dual infeasibilities.
   Assumes sequenceIn_ and pivotRow_ set and also directionIn and Out.
*/
int ClpSimplex::pivot()
{
  // scaling not allowed
  assert (!scalingFlag_);
  // assume In_ and Out_ are correct and directionOut_ set
  // (or In_ if flip
  lowerIn_ = lower_[sequenceIn_];
  valueIn_ = solution_[sequenceIn_];
  upperIn_ = upper_[sequenceIn_];
  dualIn_ = dj_[sequenceIn_];
  lowerOut_ = lower_[sequenceOut_];
  valueOut_ = solution_[sequenceOut_];
  upperOut_ = upper_[sequenceOut_];
  // for now assume primal is feasible (or in dual)
  dualOut_ = dj_[sequenceOut_];
  assert(fabs(dualOut_)<1.0e-6);
  bool roundAgain = true;
  int returnCode=0;
  bool updateSolution=true;
  while (roundAgain) {
    roundAgain=false;
    unpack(rowArray_[1]);
    factorization_->updateColumnFT(rowArray_[2],rowArray_[1]);
    alpha_=0.0;
    int i;
    int * index = rowArray_[1]->getIndices();
    int number = rowArray_[1]->getNumElements();
    double * element = rowArray_[1]->denseVector();
    assert ( !rowArray_[3]->getNumElements());
    double * saveSolution = rowArray_[3]->denseVector();
    for (i=0;i<number;i++) {
      int ii = index[i];
      if ( pivotVariable_[ii]==sequenceOut_) {
	pivotRow_=ii;
	alpha_=element[pivotRow_];
	break;
      }
    }
    if (fabs(alpha_)<1.0e-8) {
      // be on safe side and clear arrays
      rowArray_[0]->clear();
      rowArray_[1]->clear();
      return -1; // will be singular
    }
    // we are going to subtract movement from current basic
    double movement;
    // see where incoming will go to
    if (sequenceOut_<0||sequenceIn_==sequenceOut_) {
      // flip so go to bound
      movement  = ((directionIn_>0) ? upperIn_ : lowerIn_) - valueIn_;
    } else {
      // get where outgoing needs to get to
      double outValue = (directionOut_<0) ? upperOut_ : lowerOut_;
      // solutionOut_ - movement*alpha_ == outValue
      movement = (valueOut_-outValue)/alpha_;
      // set directionIn_ correctly
      directionIn_ = (movement>0) ? 1 :-1;
    }
    theta_ = movement;
    double oldValueIn = valueIn_;
    // update primal solution
    for (i=0;i<number;i++) {
      int ii = index[i];
      // get column
      int ij = pivotVariable_[ii];
      double value=element[ii];
      saveSolution[ii]= solution_[ij];
      solution_[ij] -= movement*value;
    }
    //rowArray_[1]->setNumElements(0);
    // see where something went to
#ifndef NDEBUG
    CoinRelFltEq eq(1.0e-9);
#endif
    if (sequenceOut_<0) {
      if (directionIn_<0) {
	assert (eq(solution_[sequenceIn_],upperIn_));
	solution_[sequenceIn_]=upperIn_;
      } else {
	assert (eq(solution_[sequenceIn_],lowerIn_));
	solution_[sequenceIn_]=lowerIn_;
      }
    } else {
      if (directionOut_<0) {
	assert (eq(solution_[sequenceOut_],upperOut_));
	solution_[sequenceOut_]=upperOut_;
      } else {
	assert (eq(solution_[sequenceOut_],lowerOut_));
	solution_[sequenceOut_]=lowerOut_;
      }
      valueOut_=solution_[sequenceOut_];
      solution_[sequenceIn_]=valueIn_+movement;
    }
    valueIn_=solution_[sequenceIn_];
    double objectiveChange = dualIn_*movement;
    // update duals
    if (pivotRow_>=0) {
      if (fabs(alpha_)<1.0e-8) {
	// be on safe side and clear arrays
	rowArray_[0]->clear();
	rowArray_[1]->clear();
	return -1; // will be singular
      }
      double multiplier = dualIn_/alpha_;
      rowArray_[0]->insert(pivotRow_,multiplier);
      factorization_->updateColumnTranspose(rowArray_[2],rowArray_[0]);
      // put row of tableau in rowArray[0] and columnArray[0]
      matrix_->transposeTimes(this,-1.0,
			      rowArray_[0],columnArray_[1],columnArray_[0]);
      // update column djs
      int i;
      int * index = columnArray_[0]->getIndices();
      int number = columnArray_[0]->getNumElements();
      double * element = columnArray_[0]->denseVector();
      for (i=0;i<number;i++) {
	int ii = index[i];
	dj_[ii] += element[ii];
        reducedCost_[ii] = dj_[ii];
	element[ii]=0.0;
      }
      columnArray_[0]->setNumElements(0);
      // and row djs
      index = rowArray_[0]->getIndices();
      number = rowArray_[0]->getNumElements();
      element = rowArray_[0]->denseVector();
      for (i=0;i<number;i++) {
	int ii = index[i];
	dj_[ii+numberColumns_] += element[ii];
	dual_[ii] = dj_[ii+numberColumns_];
	element[ii]=0.0;
      }
      rowArray_[0]->setNumElements(0);
      // check incoming
      assert (fabs(dj_[sequenceIn_])<1.0e-6||CoinAbs(solveType_)==2);
    }
    
    // if stable replace in basis
    int updateStatus = factorization_->replaceColumn(this,
						     rowArray_[2],
						     rowArray_[1],
						     pivotRow_,
						     alpha_);
    bool takePivot=true;
    // See if Factorization updated
    if (updateStatus) { 
      updateSolution=false;
      returnCode=1;
    }
    // if no pivots, bad update but reasonable alpha - take and invert
    if (updateStatus==2&&
	lastGoodIteration_==numberIterations_&&fabs(alpha_)>1.0e-5)
      updateStatus=4;
    if (updateStatus==1||updateStatus==4||fabs(alpha_)<1.0e-6) {
      // slight error
      if (factorization_->pivots()>5||updateStatus==4) {
	returnCode=1;
      }
    } else if (updateStatus==2) {
      // major error - put back solution
      valueIn_=oldValueIn;
      solution_[sequenceIn_]=valueIn_;
      int * index = rowArray_[1]->getIndices();
      int number = rowArray_[1]->getNumElements();
      for (i=0;i<number;i++) {
        int ii = index[i];
        // get column
        int ij = pivotVariable_[ii];
        solution_[ij] = saveSolution[ii];
      }
      if (sequenceOut_>=0)
        valueOut_=solution_[sequenceOut_];
      takePivot=false;
      if (factorization_->pivots()) {
	// refactorize here
        int factorStatus = internalFactorize(1);
        if (factorStatus) {
          printf("help in user pivot\n");
          abort();
        }
        gutsOfSolution(NULL,NULL);
	valueIn_=solution_[sequenceIn_];
	if (sequenceOut_>=0)
	  valueOut_=solution_[sequenceOut_];
	roundAgain=true;
      } else {
	returnCode=-1;
      }
    } else if (updateStatus==3) {
      // out of memory
      // increase space if not many iterations
      if (factorization_->pivots()<
	  0.5*factorization_->maximumPivots()&&
	  factorization_->pivots()<200)
	factorization_->areaFactor(
				   factorization_->areaFactor() * 1.1);
      returnCode =1; // factorize now
    }
    {
      // clear saveSolution
      int * index = rowArray_[1]->getIndices();
      int number = rowArray_[1]->getNumElements();
      for (i=0;i<number;i++) {
	int ii = index[i];
	saveSolution[ii]=0.0;
      }
    }
    rowArray_[1]->clear();
    if (takePivot) {
      int save = algorithm_;
      // make simple so always primal
      algorithm_=1;
      housekeeping(objectiveChange);
      algorithm_=save;
    }
  }
  if (returnCode == 1) {
    // refactorize here
    int factorStatus = internalFactorize(1);
    if (factorStatus) {
      printf("help in user pivot\n");
      abort();
    }
    updateSolution=true;
  } 
  if (updateSolution) {
    // just for now - recompute anyway
    gutsOfSolution(NULL,NULL);
  }
  return returnCode;
}

/* Pivot in a variable and choose an outgoing one.  Assumes primal
   feasible - will not go through a bound.  Returns step length in theta
   Returns ray in ray_ (or NULL if no pivot)
   Return codes as before but -1 means no acceptable pivot
*/
int ClpSimplex::primalPivotResult()
{
  assert (sequenceIn_>=0);
  valueIn_=solution_[sequenceIn_];
  lowerIn_=lower_[sequenceIn_];
  upperIn_=upper_[sequenceIn_];
  dualIn_=dj_[sequenceIn_];

  int returnCode = static_cast<ClpSimplexPrimal *> (this)->pivotResult();
  if (returnCode<0&&returnCode>-4) {
    return 0;
  } else {
    printf("Return code of %d from ClpSimplexPrimal::pivotResult\n",
	   returnCode);
    return -1;
  }
}
  
/* Pivot out a variable and choose an incoing one.  Assumes dual
   feasible - will not go through a reduced cost.  
   Returns step length in theta
   Returns ray in ray_ (or NULL if no pivot)
   Return codes as before but -1 means no acceptable pivot
*/
int 
ClpSimplex::dualPivotResult()
{
  return static_cast<ClpSimplexDual *> (this)->pivotResult();
}
// Factorization frequency
int 
ClpSimplex::factorizationFrequency() const
{
  if (factorization_)
    return factorization_->maximumPivots();
  else 
    return -1;
}
void 
ClpSimplex::setFactorizationFrequency(int value)
{
  if (factorization_)
    factorization_->maximumPivots(value);
}
// Common bits of coding for dual and primal
int 
ClpSimplex::startup(int ifValuesPass, int startFinishOptions)
{
  // Get rid of some arrays and empty factorization
  int useFactorization=false;
  if ((startFinishOptions&2)!=0&&(whatsChanged_&(2+512))==2+512)
    useFactorization=true; // Keep factorization if possible
#if 0
  // seems to be needed if rows deleted later in CbcModel!
  if (!solution_&&scaledMatrix_) {
    // get rid of scaled matrix
    if (scaledMatrix_->getNumRows()!=numberRows_) {
      delete scaledMatrix_;
      scaledMatrix_=NULL;
    }
  }
#endif
  // sanity check
  // bad if empty (trap here to avoid using bad matrix_)
#if 0
  // but also check bounds
  {
    int badProblem = 0;
    int i;
    for (i=0;i<numberColumns_;i++) {
      if (columnLower_[i]>columnUpper_[i])
	badProblem++;
    }
    for (i=0;i<numberRows_;i++) {
      if (rowLower_[i]>rowUpper_[i])
	badProblem++;
    }
    if (badProblem) {
      numberDualInfeasibilities_=0;
      sumDualInfeasibilities_=0.0;
      numberPrimalInfeasibilities_=badProblem;
      sumPrimalInfeasibilities_=badProblem;
      secondaryStatus_=6; // so user can see something odd
      problemStatus_=1;
      bool printIt = (specialOptions_&32768)==0 ? true : false; // no message if from Osi
      if (printIt)
	handler_->message(CLP_INFEASIBLE,messages_)
	  <<CoinMessageEol;
      return 2;
    }
  }
#endif
  if (!matrix_||(!matrix_->getNumElements()&&objective_->type()<2)) {
    int infeasNumber[2];
    double infeasSum[2];
    bool printIt = (specialOptions_&32768)==0 ? true : false; // no message if from Osi
    problemStatus_=emptyProblem(infeasNumber,infeasSum,printIt);
    if ((startFinishOptions&1)!=0) {
      // User may expect user data - fill in as required
      if (numberRows_) {
	if (!pivotVariable_) 
	  pivotVariable_ = new int [numberRows_];
	CoinIotaN(pivotVariable_,numberRows_,numberColumns_);
      }
    }
    numberDualInfeasibilities_=infeasNumber[0];
    sumDualInfeasibilities_=infeasSum[0];
    numberPrimalInfeasibilities_=infeasNumber[1];
    sumPrimalInfeasibilities_=infeasSum[1];
    return 2;
  }
  pivotRow_=-1;
  sequenceIn_=-1;
  sequenceOut_=-1;
  secondaryStatus_=0;

  primalTolerance_=dblParam_[ClpPrimalTolerance];
  dualTolerance_=dblParam_[ClpDualTolerance];
  if (problemStatus_!=10)
    numberIterations_=0;

  // put in standard form (and make row copy)
  // create modifiable copies of model rim and do optional scaling
  bool goodMatrix=createRim(7+8+16+32,true,startFinishOptions);

  if (goodMatrix) {
    // switch off factorization if bad
    if (pivotVariable_[0]<0)
      useFactorization=false;
    // Model looks okay
    // Do initial factorization
    // and set certain stuff
    // We can either set increasing rows so ...IsBasic gives pivot row
    // or we can just increment iBasic one by one
    // for now let ...iBasic give pivot row
    int saveThreshold = factorization_->denseThreshold();
    if (!useFactorization||factorization_->numberRows()!=numberRows_) {
      useFactorization = false;
      factorization_->setDefaultValues();
      // Switch off dense (unless special option set)
      if ((specialOptions_&8)==0)
        factorization_->setDenseThreshold(0);
    }
    // If values pass then perturb (otherwise may be optimal so leave a bit)
    if (ifValuesPass) {
      // do perturbation if asked for
      
      if (perturbation_<100) {
	if (algorithm_>0&&(objective_->type()<2||!objective_->activated())) {
#ifndef FEB_TRY
	  static_cast<ClpSimplexPrimal *> (this)->perturb(0);
#endif
	} else if (algorithm_<0) {
	  static_cast<ClpSimplexDual *> (this)->perturb();
	}
      }
    }
    // for primal we will change bounds using infeasibilityCost_
    if (nonLinearCost_==NULL&&algorithm_>0) {
      // get a valid nonlinear cost function
      nonLinearCost_= new ClpNonLinearCost(this);
    }
    
    // loop round to clean up solution if values pass
    int numberThrownOut = -1;
    int totalNumberThrownOut=0;
    problemStatus_=-1;
    // see if we are re-using factorization
    if (!useFactorization) {
      while(numberThrownOut) {
	int status = internalFactorize(ifValuesPass ? 10 : 0);
	if (status<0)
	  return 1; // some error
	else
	  numberThrownOut = status;

	// for this we need clean basis so it is after factorize
	if (!numberThrownOut||numberThrownOut==numberRows_+1) {
	  // solution will be done again - skip if absolutely sure
	  if ((specialOptions_&512)==0||numberThrownOut==numberRows_+1) {
	    //int saveFirstFree=firstFree_;
	    numberThrownOut = gutsOfSolution(  NULL,NULL,
					       ifValuesPass!=0);
	    //firstFree_=saveFirstFree;
	    if (largestPrimalError_>10.0&&!ifValuesPass&&!numberThrownOut) {
	      // throw out up to 1000 structurals
	      int iRow;
	      int * sort = new int[numberRows_];
	      double * array = rowArray_[0]->denseVector();
	      memset(array,0,numberRows_*sizeof(double));
	      times(-1.0,columnActivityWork_,array);
	      int numberBasic=0;
	      for (iRow=0;iRow<numberRows_;iRow++) {
		int iPivot=pivotVariable_[iRow];
		if (iPivot<numberColumns_) {
		  // column
		  double difference = fabs(array[iRow]+rowActivityWork_[iRow]);
		  if (difference>1.0e-4) {
		    sort[numberThrownOut]=iPivot;
		    array[numberThrownOut++]=difference;
		    if (getStatus(iPivot)==basic)
		      numberBasic++;
		  }
		}
	      }
	      if (!numberBasic) {
		allSlackBasis(true);
		numberThrownOut=1; // force another go
	      } else {
		CoinSort_2(array, array + numberThrownOut, sort);
		numberThrownOut = CoinMin(1000,numberThrownOut);
		for (iRow=0;iRow<numberThrownOut;iRow++) {
		  int iColumn=sort[iRow];
		  setColumnStatus(iColumn,superBasic);
		  if (fabs(solution_[iColumn])>1.0e10) {
		    if (upper_[iColumn]<0.0) {
		      solution_[iColumn]=upper_[iColumn];
		    } else if (lower_[iColumn]>0.0) {
		      solution_[iColumn]=lower_[iColumn];
		    } else {
		      solution_[iColumn]=0.0;
		    }
		  }
		}
	      }
	      CoinZeroN(array,numberRows_);
	      delete [] sort;
	    }
	  } else {
	    // make sure not optimal at once
	    numberPrimalInfeasibilities_=1;
	    numberThrownOut=0;
	  }
	} else {
	  matrix_->rhsOffset(this,true); // redo rhs offset
	}
	totalNumberThrownOut+= numberThrownOut;

      }
    } else {
      // using previous factorization - we assume fine
      if ((moreSpecialOptions_&8)==0) {
	// but we need to say not optimal
	numberPrimalInfeasibilities_=1;
	numberDualInfeasibilities_=1;
      }
      matrix_->rhsOffset(this,true); // redo rhs offset
    }
    if (totalNumberThrownOut)
      handler_->message(CLP_SINGULARITIES,messages_)
	<<totalNumberThrownOut
	<<CoinMessageEol;
    // Switch back dense
    factorization_->setDenseThreshold(saveThreshold);
    
    if (!numberPrimalInfeasibilities_&&!numberDualInfeasibilities_
	&&!ifValuesPass&&
	(!nonLinearCost_||!nonLinearCost_->numberInfeasibilities()))
      problemStatus_=0;
    else
      assert(problemStatus_ == -1);
    
    // number of times we have declared optimality
    numberTimesOptimal_=0;
    if (disasterArea_)
      disasterArea_->intoSimplex();

    return 0;
  } else {
    // bad matrix
    return 2;
  }
    
}


void 
ClpSimplex::finish(int startFinishOptions)
{
  // Get rid of some arrays and empty factorization
  int getRidOfData=1;
  if (upper_&&((startFinishOptions&1)!=0||problemStatus_==10)) {
    getRidOfData=0; // Keep stuff
    // mark all as current
    whatsChanged_ = 0x3ffffff;
  } else {
    whatsChanged_ &= ~0xffff;
  }
  deleteRim(getRidOfData);
  // Skip message if changing algorithms
  if (problemStatus_!=10) {
    if (problemStatus_==-1)
      problemStatus_=4;
    assert(problemStatus_>=0&&problemStatus_<6);
    if (handler_->detail(CLP_SIMPLEX_FINISHED,messages_)<100) {
      handler_->message(CLP_SIMPLEX_FINISHED+problemStatus_,messages_)
        <<objectiveValue()
        <<CoinMessageEol;
    }
  }
  factorization_->relaxAccuracyCheck(1.0);
  // get rid of any network stuff - could do more
  factorization_->cleanUp();
}
// Save data
ClpDataSave 
ClpSimplex::saveData() 
{
  ClpDataSave saved;
  saved.dualBound_ = dualBound_;
  saved.infeasibilityCost_ = infeasibilityCost_;
  saved.sparseThreshold_ = factorization_->sparseThreshold();
  saved.pivotTolerance_ = factorization_->pivotTolerance();
  saved.zeroFactorizationTolerance_ = factorization_->zeroTolerance();
  saved.zeroSimplexTolerance_=zeroTolerance_;
  saved.perturbation_ = perturbation_;
  saved.forceFactorization_=forceFactorization_;
  saved.acceptablePivot_ = acceptablePivot_;
  saved.objectiveScale_ = objectiveScale_;
  // Progress indicator
  progress_.fillFromModel (this);
  return saved;
}
// Restore data
void 
ClpSimplex::restoreData(ClpDataSave saved)
{
  //factorization_->sparseThreshold(saved.sparseThreshold_);
  factorization_->pivotTolerance(saved.pivotTolerance_);
  factorization_->zeroTolerance(saved.zeroFactorizationTolerance_); 
  zeroTolerance_ = saved.zeroSimplexTolerance_;
  perturbation_ = saved.perturbation_;
  infeasibilityCost_ = saved.infeasibilityCost_;
  dualBound_ = saved.dualBound_;
  forceFactorization_=saved.forceFactorization_;
  objectiveScale_ = saved.objectiveScale_;
  acceptablePivot_ = saved.acceptablePivot_;
}
// To flag a variable (not inline to allow for column generation)
void 
ClpSimplex::setFlagged( int sequence)
{
  status_[sequence] |= 64;
  matrix_->generalExpanded(this,7,sequence);
  lastFlaggedIteration_=numberIterations_;
}
/* Factorizes and returns true if optimal.  Used by user */
bool
ClpSimplex::statusOfProblem(bool initial)
{
  // We don't want scaling
  int saveFlag = scalingFlag_;
  if (!rowScale_)
    scalingFlag_=0;
  bool goodMatrix=createRim(7+8+16+32);
  if (!goodMatrix) {
    problemStatus_=4;
    scalingFlag_ = saveFlag;
    return false;
  }
  // is factorization okay?
  if (initial) {
    // First time - allow singularities
    int numberThrownOut = -1;
    int totalNumberThrownOut=0;
    while(numberThrownOut) {
      int status = internalFactorize(0);
      if (status==numberRows_+1)
	status=0; // all slack
      if (status<0) {
        deleteRim(-1);
	scalingFlag_ = saveFlag;
	return false; // some error
      } else {
	numberThrownOut = status;
      }
      
      // for this we need clean basis so it is after factorize
      //if (!numberThrownOut)
      //numberThrownOut = gutsOfSolution(  NULL,NULL,
      //				   false);
      //else
      //matrix_->rhsOffset(this,true); // redo rhs offset
      totalNumberThrownOut+= numberThrownOut;
      
    }
    
    if (totalNumberThrownOut)
      handler_->message(CLP_SINGULARITIES,messages_)
	<<totalNumberThrownOut
	<<CoinMessageEol;
  } else {
#ifndef NDEBUG    
    int returnCode=internalFactorize(1);
    assert (!returnCode);
#else
    internalFactorize(1);
#endif
  }
  CoinMemcpyN(rowActivity_,numberRows_,rowActivityWork_);
  CoinMemcpyN(columnActivity_,numberColumns_,columnActivityWork_);
  gutsOfSolution(NULL,NULL);
  CoinMemcpyN(rowActivityWork_,numberRows_,rowActivity_);
  CoinMemcpyN(columnActivityWork_,numberColumns_,columnActivity_);
  CoinMemcpyN(dj_,numberColumns_,reducedCost_);
  deleteRim(-1);
  scalingFlag_ = saveFlag;
  return (primalFeasible()&&dualFeasible());
}
/* Return model - updates any scalars */
void 
ClpSimplex::returnModel(ClpSimplex & otherModel)
{
  ClpModel::returnModel(otherModel);
  otherModel.bestPossibleImprovement_ = bestPossibleImprovement_;
  otherModel.columnPrimalSequence_ = columnPrimalSequence_;
  otherModel.zeroTolerance_ = zeroTolerance_;
  otherModel.rowPrimalSequence_ = rowPrimalSequence_;
  otherModel.bestObjectiveValue_ = bestObjectiveValue_;
  otherModel.moreSpecialOptions_ = moreSpecialOptions_;
  otherModel.baseIteration_ = baseIteration_;
  otherModel.primalToleranceToGetOptimal_ = primalToleranceToGetOptimal_;
  otherModel.largestPrimalError_ = largestPrimalError_;
  otherModel.largestDualError_ = largestDualError_;
  otherModel.alphaAccuracy_ = alphaAccuracy_;
  otherModel.alpha_ = alpha_;
  otherModel.theta_ = theta_;
  otherModel.lowerIn_ = lowerIn_;
  otherModel.valueIn_ = valueIn_;
  otherModel.upperIn_ = upperIn_;
  otherModel.dualIn_ = dualIn_;
  otherModel.sequenceIn_ = sequenceIn_;
  otherModel.directionIn_ = directionIn_;
  otherModel.lowerOut_ = lowerOut_;
  otherModel.valueOut_ = valueOut_;
  otherModel.upperOut_ = upperOut_;
  otherModel.dualOut_ = dualOut_;
  otherModel.sequenceOut_ = sequenceOut_;
  otherModel.directionOut_ = directionOut_;
  otherModel.pivotRow_ = pivotRow_;
  otherModel.sumDualInfeasibilities_ = sumDualInfeasibilities_;
  otherModel.numberDualInfeasibilities_ = numberDualInfeasibilities_;
  otherModel.numberDualInfeasibilitiesWithoutFree_ = 
    numberDualInfeasibilitiesWithoutFree_;
  otherModel.sumPrimalInfeasibilities_ = sumPrimalInfeasibilities_;
  otherModel.numberPrimalInfeasibilities_ = numberPrimalInfeasibilities_;
  otherModel.numberTimesOptimal_ = numberTimesOptimal_;
  otherModel.disasterArea_ = NULL;
  otherModel.sumOfRelaxedDualInfeasibilities_ = sumOfRelaxedDualInfeasibilities_;
  otherModel.sumOfRelaxedPrimalInfeasibilities_ = sumOfRelaxedPrimalInfeasibilities_;
  if (perturbationArray_ != otherModel.perturbationArray_) 
    delete [] perturbationArray_;
  perturbationArray_ = NULL;
  
}
/* Constructs a non linear cost from list of non-linearities (columns only)
   First lower of each column is taken as real lower
   Last lower is taken as real upper and cost ignored
   
   Returns nonzero if bad data e.g. lowers not monotonic
*/
int 
ClpSimplex::createPiecewiseLinearCosts(const int * starts,
				       const double * lower, const double * gradient)
{
  delete nonLinearCost_;
  // Set up feasible bounds and check monotonicity
  int iColumn;
  int returnCode=0;

  for (iColumn=0;iColumn<numberColumns_;iColumn++) {
    int iIndex = starts[iColumn];
    int end = starts[iColumn+1]-1;
    columnLower_[iColumn] = lower[iIndex];
    columnUpper_[iColumn] = lower[end];
    double value = columnLower_[iColumn];
    iIndex++;
    for (;iIndex<end;iIndex++) {
      if (lower[iIndex]<value)
	returnCode++; // not monotonic
      value=lower[iIndex];
    }
  }
  nonLinearCost_ = new ClpNonLinearCost(this,starts,lower,gradient);
  specialOptions_ |= 2; // say keep
  return returnCode;
}
/* For advanced use.  When doing iterative solves things can get
   nasty so on values pass if incoming solution has largest
   infeasibility < incomingInfeasibility throw out variables
   from basis until largest infeasibility < allowedInfeasibility
   or incoming largest infeasibility.
   If allowedInfeasibility>= incomingInfeasibility this is
   always possible altough you may end up with an all slack basis.
   
   Defaults are 1.0,10.0
*/
void 
ClpSimplex::setValuesPassAction(double incomingInfeasibility,
				double allowedInfeasibility)
{
  incomingInfeasibility_=incomingInfeasibility;
  allowedInfeasibility_=allowedInfeasibility;
  CoinAssert(incomingInfeasibility_>=0.0);
  CoinAssert(allowedInfeasibility_>=incomingInfeasibility_);
}
// Allow initial dense factorization
void 
ClpSimplex::setInitialDenseFactorization(bool onOff)
{
  if (onOff)
    specialOptions_ |= 8;
  else
    specialOptions_ &= ~8;
}
bool 
ClpSimplex::initialDenseFactorization() const
{
  return (specialOptions_&8)!=0;
}
/* This constructor modifies original ClpSimplex and stores
   original stuff in created ClpSimplex.  It is only to be used in
   conjunction with originalModel */
ClpSimplex::ClpSimplex (ClpSimplex * wholeModel,
			int numberColumns, const int * whichColumns)
{

  // Set up dummy row selection list
  numberRows_ = wholeModel->numberRows_;
  int * whichRow = new int [numberRows_];
  int iRow;
  for (iRow=0;iRow<numberRows_;iRow++)
    whichRow[iRow]=iRow;
  // ClpModel stuff (apart from numberColumns_)
  matrix_ = wholeModel->matrix_;
  rowCopy_ = wholeModel->rowCopy_;
  if (wholeModel->rowCopy_) {
    // note reversal of order
    wholeModel->rowCopy_ = wholeModel->rowCopy_->subsetClone(numberRows_,whichRow,
							     numberColumns,whichColumns);
  } else {
    wholeModel->rowCopy_=NULL;
  }
  whatsChanged_ &= ~0xffff;
  CoinAssert (wholeModel->matrix_);
  wholeModel->matrix_ = wholeModel->matrix_->subsetClone(numberRows_,whichRow,
					numberColumns,whichColumns);
  delete [] whichRow;
  numberColumns_ = wholeModel->numberColumns_;
  // Now ClpSimplex stuff and status_
  delete  wholeModel->primalColumnPivot_;
  wholeModel->primalColumnPivot_ = new ClpPrimalColumnSteepest(0);
  nonLinearCost_ = wholeModel->nonLinearCost_;

  // Now main arrays
  int iColumn;
  int numberTotal = numberRows_+numberColumns;
  printf("%d %d %d\n",numberTotal,numberRows_,numberColumns);
  // mapping 
  int * mapping = new int[numberRows_+numberColumns_];
  for (iColumn=0;iColumn<numberColumns_;iColumn++) 
    mapping[iColumn]=-1;
  for (iRow=0;iRow<numberRows_;iRow++) 
    mapping[iRow+numberColumns_] = iRow+numberColumns;
  // Redo costs and bounds of whole model
  wholeModel->createRim(1+4,false);
  lower_ = wholeModel->lower_;
  wholeModel->lower_ = new double [numberTotal];
  CoinMemcpyN(lower_+numberColumns_,numberRows_,wholeModel->lower_+numberColumns);
  for (iColumn=0;iColumn<numberColumns;iColumn++) {
    int jColumn = whichColumns[iColumn];
    wholeModel->lower_[iColumn]=lower_[jColumn];
    // and pointer back 
    mapping[jColumn]=iColumn;
  }
#ifdef CLP_DEBUG
  for (iColumn=0;iColumn<numberRows_+numberColumns_;iColumn++) 
    printf("mapx %d %d\n",iColumn,mapping[iColumn]);
#endif
  // Re-define pivotVariable_
  for (iRow=0;iRow<numberRows_;iRow++) {
    int iPivot = wholeModel->pivotVariable_[iRow];
    wholeModel->pivotVariable_[iRow]=mapping[iPivot];
#ifdef CLP_DEBUG
    printf("p row %d, pivot %d -> %d\n",iRow,iPivot,mapping[iPivot]);
#endif
    assert (wholeModel->pivotVariable_[iRow]>=0);
  }
  // Reverse mapping (so extended version of whichColumns)
  for (iColumn=0;iColumn<numberColumns;iColumn++) 
    mapping[iColumn]=whichColumns[iColumn];
  for (;iColumn<numberRows_+numberColumns;iColumn++) 
    mapping[iColumn] = iColumn + (numberColumns_-numberColumns);
#ifdef CLP_DEBUG
  for (iColumn=0;iColumn<numberRows_+numberColumns;iColumn++) 
    printf("map %d %d\n",iColumn,mapping[iColumn]);
#endif
  // Save mapping somewhere - doesn't matter
  rowUpper_ = reinterpret_cast<double *> (mapping);
  upper_ = wholeModel->upper_;
  wholeModel->upper_ = new double [numberTotal];
  for (iColumn=0;iColumn<numberTotal;iColumn++) {
    int jColumn = mapping[iColumn];
    wholeModel->upper_[iColumn]=upper_[jColumn];
  }
  cost_ = wholeModel->cost_;
  wholeModel->cost_ = new double [numberTotal];
  for (iColumn=0;iColumn<numberTotal;iColumn++) {
    int jColumn = mapping[iColumn];
    wholeModel->cost_[iColumn]=cost_[jColumn];
  }
  dj_ = wholeModel->dj_;
  wholeModel->dj_ = new double [numberTotal];
  for (iColumn=0;iColumn<numberTotal;iColumn++) {
    int jColumn = mapping[iColumn];
    wholeModel->dj_[iColumn]=dj_[jColumn];
  }
  solution_ = wholeModel->solution_;
  wholeModel->solution_ = new double [numberTotal];
  for (iColumn=0;iColumn<numberTotal;iColumn++) {
    int jColumn = mapping[iColumn];
    wholeModel->solution_[iColumn]=solution_[jColumn];
  }
  // now see what variables left out do to row solution
  double * rowSolution = wholeModel->solution_+numberColumns;
  double * fullSolution = solution_;
  double * sumFixed = new double[numberRows_];
  memset (sumFixed,0,numberRows_*sizeof(double));
  // zero out ones in small problem
  for (iColumn=0;iColumn<numberColumns;iColumn++) {
    int jColumn = mapping[iColumn];
    fullSolution[jColumn]=0.0;
  }
  // Get objective offset
  double originalOffset;
  wholeModel->getDblParam(ClpObjOffset,originalOffset);
  double offset=0.0;
  const double * cost = cost_;
  for (iColumn=0;iColumn<numberColumns_;iColumn++) 
    offset += fullSolution[iColumn]*cost[iColumn];
  wholeModel->setDblParam(ClpObjOffset,originalOffset-offset);
  setDblParam(ClpObjOffset,originalOffset);
  matrix_->times(1.0,fullSolution,sumFixed,wholeModel->rowScale_,wholeModel->columnScale_);
      
  double * lower = lower_+numberColumns;
  double * upper = upper_+numberColumns;
  double fixed=0.0;
  for (iRow=0;iRow<numberRows_;iRow++) {
    fixed += fabs(sumFixed[iRow]);
    if (lower[iRow]>-1.0e50) 
      lower[iRow] -= sumFixed[iRow];
    if (upper[iRow]<1.0e50)
      upper[iRow] -= sumFixed[iRow];
    rowSolution[iRow] -= sumFixed[iRow];
  }
  printf("offset %g sumfixed %g\n",offset,fixed);
  delete [] sumFixed;
  columnScale_ = wholeModel->columnScale_;
  if (columnScale_) {
    wholeModel->columnScale_ = new double [numberTotal];
    for (iColumn=0;iColumn<numberColumns;iColumn++) {
      int jColumn = mapping[iColumn];
      wholeModel->columnScale_[iColumn]=columnScale_[jColumn];
    }
  }
  status_ = wholeModel->status_;
  wholeModel->status_ = new unsigned char [numberTotal];
  for (iColumn=0;iColumn<numberTotal;iColumn++) {
    int jColumn = mapping[iColumn];
    wholeModel->status_[iColumn]=status_[jColumn];
  }
  savedSolution_ = wholeModel->savedSolution_;
  if (savedSolution_) {
    wholeModel->savedSolution_ = new double [numberTotal];
    for (iColumn=0;iColumn<numberTotal;iColumn++) {
      int jColumn = mapping[iColumn];
      wholeModel->savedSolution_[iColumn]=savedSolution_[jColumn];
    }
  }
  saveStatus_ = wholeModel->saveStatus_;
  if (saveStatus_) {
    wholeModel->saveStatus_ = new unsigned char [numberTotal];
    for (iColumn=0;iColumn<numberTotal;iColumn++) {
      int jColumn = mapping[iColumn];
      wholeModel->saveStatus_[iColumn]=saveStatus_[jColumn];
    }
  }
  
  wholeModel->numberColumns_ = numberColumns;
  // Initialize weights
  wholeModel->primalColumnPivot_->saveWeights(wholeModel,2);
  // Costs
  wholeModel->nonLinearCost_ = new ClpNonLinearCost(wholeModel);
  wholeModel->nonLinearCost_->checkInfeasibilities();
  printf("after contraction %d infeasibilities summing to %g\n",
	 nonLinearCost_->numberInfeasibilities(),nonLinearCost_->sumInfeasibilities());
  // Redo some stuff
  wholeModel->reducedCostWork_ = wholeModel->dj_;
  wholeModel->rowReducedCost_ = wholeModel->dj_+wholeModel->numberColumns_;
  wholeModel->columnActivityWork_ = wholeModel->solution_;
  wholeModel->rowActivityWork_ = wholeModel->solution_+wholeModel->numberColumns_;
  wholeModel->objectiveWork_ = wholeModel->cost_;
  wholeModel->rowObjectiveWork_ = wholeModel->cost_+wholeModel->numberColumns_;
  wholeModel->rowLowerWork_ = wholeModel->lower_+wholeModel->numberColumns_;
  wholeModel->columnLowerWork_ = wholeModel->lower_;
  wholeModel->rowUpperWork_ = wholeModel->upper_+wholeModel->numberColumns_;
  wholeModel->columnUpperWork_ = wholeModel->upper_;
#ifndef NDEBUG
  // Check status
  ClpSimplex * xxxx = wholeModel;
  int nBasic=0;
  for (iColumn=0;iColumn<xxxx->numberRows_+xxxx->numberColumns_;iColumn++)
    if (xxxx->getStatus(iColumn)==basic)
      nBasic++;
  assert (nBasic==xxxx->numberRows_);
  for (iRow=0;iRow<xxxx->numberRows_;iRow++) {
    int iPivot=xxxx->pivotVariable_[iRow];
    assert (xxxx->getStatus(iPivot)==basic);
  }
#endif
}
/* This copies back stuff from miniModel and then deletes miniModel.
   Only to be used with mini constructor */
void 
ClpSimplex::originalModel(ClpSimplex * miniModel)
{
  int numberSmall = numberColumns_;
  numberColumns_ = miniModel->numberColumns_;
  int numberTotal = numberSmall+numberRows_;
  // copy back
  int iColumn;
  int * mapping = reinterpret_cast<int *> (miniModel->rowUpper_);
#ifdef CLP_DEBUG
  for (iColumn=0;iColumn<numberRows_+numberColumns_;iColumn++) 
    printf("mapb %d %d\n",iColumn,mapping[iColumn]);
#endif
  // miniModel actually has full arrays
  // now see what variables left out do to row solution
  double * fullSolution = miniModel->solution_;
  double * sumFixed = new double[numberRows_];
  memset (sumFixed,0,numberRows_*sizeof(double));
  miniModel->matrix_->times(1.0,fullSolution,sumFixed,rowScale_,miniModel->columnScale_);
      
  for (iColumn=0;iColumn<numberTotal;iColumn++) {
    int jColumn = mapping[iColumn];
    miniModel->lower_[jColumn]=lower_[iColumn];
    miniModel->upper_[jColumn]=upper_[iColumn];
    miniModel->cost_[jColumn]=cost_[iColumn];
    miniModel->dj_[jColumn]=dj_[iColumn];
    miniModel->solution_[jColumn]=solution_[iColumn];
    miniModel->status_[jColumn]=status_[iColumn];
#ifdef CLP_DEBUG
    printf("%d in small -> %d in original\n",iColumn,jColumn);
#endif
  }
  delete [] lower_;
  lower_ =  miniModel->lower_;
  delete [] upper_;
  upper_ =  miniModel->upper_;
  delete [] cost_;
  cost_ =  miniModel->cost_;
  delete [] dj_;
  dj_ =  miniModel->dj_;
  delete [] solution_;
  solution_ =  miniModel->solution_;
  delete [] status_;
  status_ =  miniModel->status_;
  if (columnScale_) {
    for (iColumn=0;iColumn<numberSmall;iColumn++) {
      int jColumn = mapping[iColumn];
      miniModel->columnScale_[jColumn]=columnScale_[iColumn];
    }
    delete [] columnScale_;
    columnScale_ =  miniModel->columnScale_;
  }
  if (savedSolution_) {
    if (!miniModel->savedSolution_) {
      miniModel->savedSolution_ = ClpCopyOfArray(solution_,numberColumns_+numberRows_);
    } else {
      for (iColumn=0;iColumn<numberTotal;iColumn++) {
	int jColumn = mapping[iColumn];
	miniModel->savedSolution_[jColumn]=savedSolution_[iColumn];
      }
    }
    delete [] savedSolution_;
    savedSolution_ =  miniModel->savedSolution_;
  }
  if (saveStatus_) {
    if (!miniModel->saveStatus_) {
      miniModel->saveStatus_ = ClpCopyOfArray(status_,numberColumns_+numberRows_);
    } else {
      for (iColumn=0;iColumn<numberTotal;iColumn++) {
	int jColumn = mapping[iColumn];
	miniModel->saveStatus_[jColumn]=saveStatus_[iColumn];
      }
    }
    delete [] saveStatus_;
    saveStatus_ =  miniModel->saveStatus_;
  }
  // Re-define pivotVariable_
  int iRow;
  for (iRow=0;iRow<numberRows_;iRow++) {
    int iPivot = pivotVariable_[iRow];
#ifdef CLP_DEBUG
    printf("pb row %d, pivot %d -> %d\n",iRow,iPivot,mapping[iPivot]);
#endif
    pivotVariable_[iRow]=mapping[iPivot];
    assert (pivotVariable_[iRow]>=0);
  }
  // delete stuff and move back
  delete matrix_;
  delete rowCopy_;
  delete primalColumnPivot_;
  delete nonLinearCost_;
  matrix_ = miniModel->matrix_;
  rowCopy_ = miniModel->rowCopy_;
  nonLinearCost_ = miniModel->nonLinearCost_;
  double originalOffset;
  miniModel->getDblParam(ClpObjOffset,originalOffset);
  setDblParam(ClpObjOffset,originalOffset);
  // Redo some stuff
  reducedCostWork_ = dj_;
  rowReducedCost_ = dj_+numberColumns_;
  columnActivityWork_ = solution_;
  rowActivityWork_ = solution_+numberColumns_;
  objectiveWork_ = cost_;
  rowObjectiveWork_ = cost_+numberColumns_;
  rowLowerWork_ = lower_+numberColumns_;
  columnLowerWork_ = lower_;
  rowUpperWork_ = upper_+numberColumns_;
  columnUpperWork_ = upper_;
  // Cleanup
  for (iRow=0;iRow<numberRows_;iRow++) {
    double value = rowActivityWork_[iRow] + sumFixed[iRow];
    rowActivityWork_[iRow] = value;
    switch(getRowStatus(iRow)) {
      
    case basic:
      break;
    case atUpperBound:
      //rowActivityWork_[iRow]=rowUpperWork_[iRow];
      break;
    case ClpSimplex::isFixed:
    case atLowerBound:
      //rowActivityWork_[iRow]=rowLowerWork_[iRow];
      break;
    case isFree:
      break;
      // superbasic
    case superBasic:
      break;
    }
  }
  delete [] sumFixed;
  nonLinearCost_->checkInfeasibilities();
  printf("in original %d infeasibilities summing to %g\n",
	 nonLinearCost_->numberInfeasibilities(),nonLinearCost_->sumInfeasibilities());
  // Initialize weights
  primalColumnPivot_ = new ClpPrimalColumnSteepest(10);
  primalColumnPivot_->saveWeights(this,2);
#ifndef NDEBUG
  // Check status
  ClpSimplex * xxxx = this;
  int nBasic=0;
  for (iColumn=0;iColumn<xxxx->numberRows_+xxxx->numberColumns_;iColumn++)
    if (xxxx->getStatus(iColumn)==basic)
      nBasic++;
  assert (nBasic==xxxx->numberRows_);
  for (iRow=0;iRow<xxxx->numberRows_;iRow++) {
    int iPivot=xxxx->pivotVariable_[iRow];
    assert (xxxx->getStatus(iPivot)==basic);
  }
#endif
}
// Pass in Event handler (cloned and deleted at end)
void 
ClpSimplex::passInEventHandler(const ClpEventHandler * eventHandler)
{
  delete eventHandler_;
  eventHandler_ = eventHandler->clone();
  eventHandler_->setSimplex(this);
}
#ifndef NDEBUG
// For errors to make sure print to screen
// only called in debug mode
static void indexError(int index,
			std::string methodName)
{
  std::cerr<<"Illegal index "<<index<<" in ClpSimplex::"<<methodName<<std::endl;
  throw CoinError("Illegal index",methodName,"ClpSimplex");
}
#endif
// These are only to be used using startFinishOptions (ClpSimplexDual, ClpSimplexPrimal)
//Get a row of the tableau (slack part in slack if not NULL)
void 
ClpSimplex::getBInvARow(int row, double* z, double * slack)
{
#ifndef NDEBUG
  int n = numberRows();
  if (row<0||row>=n) {
    indexError(row,"getBInvARow");
  }
#endif
  if (!rowArray_[0]) {
    printf("ClpSimplexPrimal or ClpSimplexDual must have been called with correct startFinishOption\n");
    abort();
  }
  CoinIndexedVector * rowArray0 = rowArray(0);
  CoinIndexedVector * rowArray1 = rowArray(1);
  CoinIndexedVector * columnArray0 = columnArray(0);
  CoinIndexedVector * columnArray1 = columnArray(1);
  rowArray0->clear();
  rowArray1->clear();
  columnArray0->clear();
  columnArray1->clear();
  // put +1 in row 
  // But swap if pivot variable was slack as clp stores slack as -1.0
  int pivot = pivotVariable_[row];
  double value;
  // And if scaled then adjust
  if (!rowScale_) {
    if (pivot<numberColumns_)
      value = 1.0;
    else
      value = -1.0;
  } else {
    if (pivot<numberColumns_)
      value = columnScale_[pivot];
    else
      value = -1.0*inverseRowScale_[pivot-numberColumns_];
  }
  rowArray1->insert(row,value);
  factorization_->updateColumnTranspose(rowArray0,rowArray1);
  // put row of tableau in rowArray1 and columnArray0
  clpMatrix()->transposeTimes(this,1.0,
			    rowArray1,columnArray1,columnArray0);
  if (!rowScale_) {
    CoinMemcpyN(columnArray0->denseVector(),	numberColumns_,z);
  } else {
    double * array = columnArray0->denseVector();
    for (int i=0;i<numberColumns_;i++)
      z[i] = array[i]*inverseColumnScale_[i];
  }
  if (slack) {
    if (!rowScale_) {
      CoinMemcpyN(rowArray1->denseVector(),	numberRows_,slack);
    } else {
      double * array = rowArray1->denseVector();
      for (int i=0;i<numberRows_;i++)
	slack[i] = array[i]*rowScale_[i];
    }
  }
  // don't need to clear everything always, but doesn't cost
  rowArray0->clear();
  rowArray1->clear();
  columnArray0->clear();
  columnArray1->clear();
}

//Get a row of the basis inverse
void 
ClpSimplex::getBInvRow(int row, double* z)

{
#ifndef NDEBUG
  int n = numberRows();
  if (row<0||row>=n) {
    indexError(row,"getBInvRow");
  }
#endif
  if (!rowArray_[0]) {
    printf("ClpSimplexPrimal or ClpSimplexDual must have been called with correct startFinishOption\n");
    abort();
  }
  ClpFactorization * factorization = factorization_;
  CoinIndexedVector * rowArray0 = rowArray(0);
  CoinIndexedVector * rowArray1 = rowArray(1);
  rowArray0->clear();
  rowArray1->clear();
  // put +1 in row
  // But swap if pivot variable was slack as clp stores slack as -1.0
  double value = (pivotVariable_[row]<numberColumns_) ? 1.0 : -1.0;
  // but scale
  if (rowScale_) {
    int pivot = pivotVariable_[row];
    if (pivot<numberColumns_) 
      value *= columnScale_[pivot];
    else
      value /= rowScale_[pivot-numberColumns_];
  }
  rowArray1->insert(row,value);
  factorization->updateColumnTranspose(rowArray0,rowArray1);
  if (!rowScale_) {
    CoinMemcpyN(rowArray1->denseVector(),numberRows_,z);
  } else {
    double * array = rowArray1->denseVector();
    for (int i=0;i<numberRows_;i++) {
      z[i] = array[i] * rowScale_[i];
    }
  }
  rowArray1->clear();
}

//Get a column of the tableau
void 
ClpSimplex::getBInvACol(int col, double* vec)
{
  if (!rowArray_[0]) {
    printf("ClpSimplexPrimal or ClpSimplexDual should have been called with correct startFinishOption\n");
    abort();
  }
  CoinIndexedVector * rowArray0 = rowArray(0);
  CoinIndexedVector * rowArray1 = rowArray(1);
  rowArray0->clear();
  rowArray1->clear();
  // get column of matrix
#ifndef NDEBUG
  int n = numberColumns_+numberRows_;
  if (col<0||col>=n) {
    indexError(col,"getBInvACol");
  }
#endif
  if (!rowScale_) {
    if (col<numberColumns_) {
      unpack(rowArray1,col);
    } else {
      rowArray1->insert(col-numberColumns_,1.0);
    }
  } else {
    if (col<numberColumns_) {
      unpack(rowArray1,col);
      double multiplier = 1.0*inverseColumnScale_[col];
      int number = rowArray1->getNumElements();
      int * index = rowArray1->getIndices();
      double * array = rowArray1->denseVector();
      for (int i=0;i<number;i++) {
	int iRow = index[i];
	// make sure not packed
	assert (array[iRow]);
	array[iRow] *= multiplier;
      }
    } else {
      rowArray1->insert(col-numberColumns_,rowScale_[col-numberColumns_]);
    }
  }
  factorization_->updateColumn(rowArray0,rowArray1,false);
  // But swap if pivot variable was slack as clp stores slack as -1.0
  double * array = rowArray1->denseVector();
  if (!rowScale_) {
    for (int i=0;i<numberRows_;i++) {
      double multiplier = (pivotVariable_[i]<numberColumns_) ? 1.0 : -1.0;
      vec[i] = multiplier * array[i];
    }
  } else {
    for (int i=0;i<numberRows_;i++) {
      int pivot = pivotVariable_[i];
      if (pivot<numberColumns_)
	vec[i] = array[i] * columnScale_[pivot];
      else
	vec[i] = - array[i] / rowScale_[pivot-numberColumns_];
    }
  }
  rowArray1->clear();
}

//Get a column of the basis inverse
void 
ClpSimplex::getBInvCol(int col, double* vec)
{
  if (!rowArray_[0]) {
    printf("ClpSimplexPrimal or ClpSimplexDual must have been called with correct startFinishOption\n");
    abort();
  }
  CoinIndexedVector * rowArray0 = rowArray(0);
  CoinIndexedVector * rowArray1 = rowArray(1);
  rowArray0->clear();
  rowArray1->clear();
#ifndef NDEBUG
  int n = numberRows();
  if (col<0||col>=n) {
    indexError(col,"getBInvCol");
  }
#endif
  // put +1 in row
  // but scale
  double value;
  if (!rowScale_) {
    value=1.0;
  } else {
    value = rowScale_[col];
  }
  rowArray1->insert(col,value);
  factorization_->updateColumn(rowArray0,rowArray1,false);
  // But swap if pivot variable was slack as clp stores slack as -1.0
  double * array = rowArray1->denseVector();
  if (!rowScale_) {
    for (int i=0;i<numberRows_;i++) {
      double multiplier = (pivotVariable_[i]<numberColumns_) ? 1.0 : -1.0;
      vec[i] = multiplier * array[i];
    }
  } else {
    for (int i=0;i<numberRows_;i++) {
      int pivot = pivotVariable_[i];
      double value = array[i];
      if (pivot<numberColumns_) 
	vec[i] = value * columnScale_[pivot];
      else
	vec[i] = - value / rowScale_[pivot-numberColumns_];
    }
  }
  rowArray1->clear();
}

/* Get basic indices (order of indices corresponds to the
   order of elements in a vector retured by getBInvACol() and
   getBInvCol()).
*/
void 
ClpSimplex::getBasics(int* index)
{
  if (!rowArray_[0]) {
    printf("ClpSimplexPrimal or ClpSimplexDual must have been called with correct startFinishOption\n");
    abort();
  }
  CoinAssert (index);
  CoinMemcpyN(pivotVariable(),	numberRows(),index);
}
/* Set an objective function coefficient */
void 
ClpSimplex::setObjectiveCoefficient( int elementIndex, double elementValue )
{
#ifndef NDEBUG
  if (elementIndex<0||elementIndex>=numberColumns_) {
    indexError(elementIndex,"setObjectiveCoefficient");
  }
#endif
  if (objective()[elementIndex] != elementValue) {
    objective()[elementIndex] = elementValue;
    if ((whatsChanged_&1)!=0) {
      // work arrays exist - update as well
      whatsChanged_ &= ~64;
      double direction = optimizationDirection_*objectiveScale_;
      if (!rowScale_) {
	objectiveWork_[elementIndex] = direction*elementValue;
      } else {
	objectiveWork_[elementIndex] = direction*elementValue
	  *columnScale_[elementIndex];
      }
    }
  }
}
/* Set a single row lower bound<br>
   Use -DBL_MAX for -infinity. */
void 
ClpSimplex::setRowLower( int elementIndex, double elementValue ) {
#ifndef NDEBUG
  int n = numberRows_;
  if (elementIndex<0||elementIndex>=n) {
    indexError(elementIndex,"setRowLower");
  }
#endif
  if (elementValue<-1.0e27)
    elementValue=-COIN_DBL_MAX;
  if (rowLower_[elementIndex] != elementValue) {
    rowLower_[elementIndex] = elementValue;
    if ((whatsChanged_&1)!=0) {
      // work arrays exist - update as well
      whatsChanged_ &= ~16;
      if (rowLower_[elementIndex]==-COIN_DBL_MAX) {
	rowLowerWork_[elementIndex] = -COIN_DBL_MAX;
      } else if (!rowScale_) {
	rowLowerWork_[elementIndex] = elementValue * rhsScale_;
      } else {
	rowLowerWork_[elementIndex] = elementValue * rhsScale_ 
	  * rowScale_[elementIndex];
      }
    }
  }
}
      
/* Set a single row upper bound<br>
   Use DBL_MAX for infinity. */
void 
ClpSimplex::setRowUpper( int elementIndex, double elementValue ) {
#ifndef NDEBUG
  int n = numberRows_;
  if (elementIndex<0||elementIndex>=n) {
    indexError(elementIndex,"setRowUpper");
  }
#endif
  if (elementValue>1.0e27)
    elementValue=COIN_DBL_MAX;
  if (rowUpper_[elementIndex] != elementValue) {
    rowUpper_[elementIndex] = elementValue;
    if ((whatsChanged_&1)!=0) {
      // work arrays exist - update as well
      whatsChanged_ &= ~32;
      if (rowUpper_[elementIndex]==COIN_DBL_MAX) {
	rowUpperWork_[elementIndex] = COIN_DBL_MAX;
      } else if (!rowScale_) {
	rowUpperWork_[elementIndex] = elementValue * rhsScale_;
      } else {
	rowUpperWork_[elementIndex] = elementValue * rhsScale_ 
	  * rowScale_[elementIndex];
      }
    }
  }
}
    
/* Set a single row lower and upper bound */
void 
ClpSimplex::setRowBounds( int elementIndex,
	      double lowerValue, double upperValue ) {
#ifndef NDEBUG
  int n = numberRows_;
  if (elementIndex<0||elementIndex>=n) {
    indexError(elementIndex,"setRowBounds");
  }
#endif
  if (lowerValue<-1.0e27)
    lowerValue=-COIN_DBL_MAX;
  if (upperValue>1.0e27)
    upperValue=COIN_DBL_MAX;
  //CoinAssert (upperValue>=lowerValue);
  if (rowLower_[elementIndex] != lowerValue) {
    rowLower_[elementIndex] = lowerValue;
    if ((whatsChanged_&1)!=0) {
      // work arrays exist - update as well
      whatsChanged_ &= ~16;
      if (rowLower_[elementIndex]==-COIN_DBL_MAX) {
	rowLowerWork_[elementIndex] = -COIN_DBL_MAX;
      } else if (!rowScale_) {
	rowLowerWork_[elementIndex] = lowerValue * rhsScale_;
      } else {
	rowLowerWork_[elementIndex] = lowerValue * rhsScale_ 
	  * rowScale_[elementIndex];
      }
    }
  }
  if (rowUpper_[elementIndex] != upperValue) {
    rowUpper_[elementIndex] = upperValue;
    if ((whatsChanged_&1)!=0) {
      // work arrays exist - update as well
      whatsChanged_ &= ~32;
      if (rowUpper_[elementIndex]==COIN_DBL_MAX) {
	rowUpperWork_[elementIndex] = COIN_DBL_MAX;
      } else if (!rowScale_) {
	rowUpperWork_[elementIndex] = upperValue * rhsScale_;
      } else {
	rowUpperWork_[elementIndex] = upperValue * rhsScale_ 
	  * rowScale_[elementIndex];
      }
    }
  }
}
void ClpSimplex::setRowSetBounds(const int* indexFirst,
					    const int* indexLast,
					    const double* boundList)
{
#ifndef NDEBUG
  int n = numberRows_;
#endif
  int numberChanged=0;
  const int * saveFirst=indexFirst;
  while (indexFirst != indexLast) {
    const int iRow=*indexFirst++;
#ifndef NDEBUG
    if (iRow<0||iRow>=n) {
      indexError(iRow,"setRowSetBounds");
    }
#endif
    double lowerValue = *boundList++;
    double upperValue = *boundList++;
    if (lowerValue<-1.0e27)
      lowerValue=-COIN_DBL_MAX;
    if (upperValue>1.0e27)
      upperValue=COIN_DBL_MAX;
    //CoinAssert (upperValue>=lowerValue);
    if (rowLower_[iRow] != lowerValue) {
      rowLower_[iRow] = lowerValue;
      whatsChanged_ &= ~16;
      numberChanged++;
    }
    if (rowUpper_[iRow] != upperValue) {
      rowUpper_[iRow] = upperValue;
      whatsChanged_ &= ~32;
      numberChanged++;
    }
  }
  if (numberChanged&&(whatsChanged_&1)!=0) {
    indexFirst = saveFirst;
    while (indexFirst != indexLast) {
      const int iRow=*indexFirst++;
      if (rowLower_[iRow]==-COIN_DBL_MAX) {
	rowLowerWork_[iRow] = -COIN_DBL_MAX;
      } else if (!rowScale_) {
	rowLowerWork_[iRow] = rowLower_[iRow] * rhsScale_;
      } else {
	rowLowerWork_[iRow] = rowLower_[iRow] * rhsScale_ 
	  * rowScale_[iRow];
      }
      if (rowUpper_[iRow]==COIN_DBL_MAX) {
	rowUpperWork_[iRow] = COIN_DBL_MAX;
      } else if (!rowScale_) {
	rowUpperWork_[iRow] = rowUpper_[iRow] * rhsScale_;
      } else {
	rowUpperWork_[iRow] = rowUpper_[iRow] * rhsScale_ 
	  * rowScale_[iRow];
      }
    }
  }
}
//-----------------------------------------------------------------------------
/* Set a single column lower bound<br>
   Use -DBL_MAX for -infinity. */
void 
ClpSimplex::setColumnLower( int elementIndex, double elementValue )
{
#ifndef NDEBUG
  int n = numberColumns_;
  if (elementIndex<0||elementIndex>=n) {
    indexError(elementIndex,"setColumnLower");
  }
#endif
  if (elementValue<-1.0e27)
    elementValue=-COIN_DBL_MAX;
  if (columnLower_[elementIndex] != elementValue) {
    columnLower_[elementIndex] = elementValue;
    if ((whatsChanged_&1)!=0) {
      // work arrays exist - update as well
      whatsChanged_ &= ~128;
      double value;
      if (columnLower_[elementIndex]==-COIN_DBL_MAX) {
	value = -COIN_DBL_MAX;
      } else if (!columnScale_) {
	value = elementValue * rhsScale_;
      } else {
	value = elementValue * rhsScale_ 
	  / columnScale_[elementIndex];
      }
      lower_[elementIndex] = value;
      if (maximumRows_>=0)
	lower_[elementIndex+maximumRows_+maximumColumns_] = value;
    }
  }
}
      
/* Set a single column upper bound<br>
   Use DBL_MAX for infinity. */
void 
ClpSimplex::setColumnUpper( int elementIndex, double elementValue )
{
#ifndef NDEBUG
  int n = numberColumns_;
  if (elementIndex<0||elementIndex>=n) {
    indexError(elementIndex,"setColumnUpper");
  }
#endif
  if (elementValue>1.0e27)
    elementValue=COIN_DBL_MAX;
  if (columnUpper_[elementIndex] != elementValue) {
    columnUpper_[elementIndex] = elementValue;
    if ((whatsChanged_&1)!=0) {
      // work arrays exist - update as well
      whatsChanged_ &= ~256;
      double value;
      if (columnUpper_[elementIndex]==COIN_DBL_MAX) {
	value = COIN_DBL_MAX;
      } else if (!columnScale_) {
	value = elementValue * rhsScale_;
      } else {
	value = elementValue * rhsScale_ 
	  / columnScale_[elementIndex];
      }
      //assert (columnUpperWork_==upper_);
      upper_[elementIndex] = value;
      if (maximumRows_>=0)
	upper_[elementIndex+maximumRows_+maximumColumns_] = value;
    }
  }
}

/* Set a single column lower and upper bound */
void 
ClpSimplex::setColumnBounds( int elementIndex,
				     double lowerValue, double upperValue )
{
#ifndef NDEBUG
  int n = numberColumns_;
  if (elementIndex<0||elementIndex>=n) {
    indexError(elementIndex,"setColumnBounds");
  }
#endif
  if (lowerValue<-1.0e27)
    lowerValue=-COIN_DBL_MAX;
  if (columnLower_[elementIndex] != lowerValue) {
    columnLower_[elementIndex] = lowerValue;
    if ((whatsChanged_&1)!=0) {
      // work arrays exist - update as well
      whatsChanged_ &= ~128;
      if (columnLower_[elementIndex]==-COIN_DBL_MAX) {
	lower_[elementIndex] = -COIN_DBL_MAX;
      } else if (!columnScale_) {
	lower_[elementIndex] = lowerValue * rhsScale_;
      } else {
	lower_[elementIndex] = lowerValue * rhsScale_ 
	  / columnScale_[elementIndex];
      }
    }
  }
  if (upperValue>1.0e27)
    upperValue=COIN_DBL_MAX;
  //CoinAssert (upperValue>=lowerValue);
  if (columnUpper_[elementIndex] != upperValue) {
    columnUpper_[elementIndex] = upperValue;
    if ((whatsChanged_&1)!=0) {
      // work arrays exist - update as well
      whatsChanged_ &= ~256;
      if (columnUpper_[elementIndex]==COIN_DBL_MAX) {
	upper_[elementIndex] = COIN_DBL_MAX;
      } else if (!columnScale_) {
	upper_[elementIndex] = upperValue * rhsScale_;
      } else {
	upper_[elementIndex] = upperValue * rhsScale_ 
	  / columnScale_[elementIndex];
      }
    }
  }
}
void ClpSimplex::setColumnSetBounds(const int* indexFirst,
					    const int* indexLast,
					    const double* boundList)
{
#ifndef NDEBUG
  int n = numberColumns_;
#endif
  int numberChanged=0;
  const int * saveFirst=indexFirst;
  while (indexFirst != indexLast) {
    const int iColumn=*indexFirst++;
#ifndef NDEBUG
    if (iColumn<0||iColumn>=n) {
      indexError(iColumn,"setColumnSetBounds");
    }
#endif
    double lowerValue = *boundList++;
    double upperValue = *boundList++;
    if (lowerValue<-1.0e27)
      lowerValue=-COIN_DBL_MAX;
    if (upperValue>1.0e27)
      upperValue=COIN_DBL_MAX;
    //CoinAssert (upperValue>=lowerValue);
    if (columnLower_[iColumn] != lowerValue) {
      columnLower_[iColumn] = lowerValue;
      whatsChanged_ &= ~16;
      numberChanged++;
    }
    if (columnUpper_[iColumn] != upperValue) {
      columnUpper_[iColumn] = upperValue;
      whatsChanged_ &= ~32;
      numberChanged++;
    }
  }
  if (numberChanged&&(whatsChanged_&1)!=0) {
    indexFirst = saveFirst;
    while (indexFirst != indexLast) {
      const int iColumn=*indexFirst++;
      if (columnLower_[iColumn]==-COIN_DBL_MAX) {
	lower_[iColumn] = -COIN_DBL_MAX;
      } else if (!columnScale_) {
	lower_[iColumn] = columnLower_[iColumn] * rhsScale_;
      } else {
	lower_[iColumn] = columnLower_[iColumn] * rhsScale_ 
	  / columnScale_[iColumn];
      }
      if (columnUpper_[iColumn]==COIN_DBL_MAX) {
	upper_[iColumn] = COIN_DBL_MAX;
      } else if (!columnScale_) {
	upper_[iColumn] = columnUpper_[iColumn] * rhsScale_;
      } else {
	upper_[iColumn] = columnUpper_[iColumn] * rhsScale_ 
	  / columnScale_[iColumn];
      }
    }
  }
}
/* Just check solution (for internal use) - sets sum of
   infeasibilities etc. */
void 
ClpSimplex::checkSolutionInternal()
{
  double dualTolerance=dblParam_[ClpDualTolerance];
  double primalTolerance=dblParam_[ClpPrimalTolerance];
  double nonLinearOffset=0.0;
  const double * objective = objective_->gradient(this,columnActivity_,
                                                  nonLinearOffset,true);
  int iRow,iColumn;
  assert (!rowObjective_);

  objectiveValue_ = 0.0;
  // now look at solution
  sumPrimalInfeasibilities_=0.0;
  numberPrimalInfeasibilities_=0;

  sumDualInfeasibilities_=0.0;
  numberDualInfeasibilities_=0;
  double maxmin = optimizationDirection_;

  for (iRow=0;iRow<numberRows_;iRow++) {
    double dualValue = dual_[iRow]*maxmin;
    double primalValue = rowActivity_[iRow];
    double lower = rowLower_[iRow];
    double upper = rowUpper_[iRow];
    ClpSimplex::Status status = getRowStatus(iRow);
    if (status!=basic) {
      if (lower==upper) {
	status = ClpSimplex::isFixed;
      } else if (primalValue>upper-primalTolerance) {
	status = ClpSimplex::atUpperBound;
      } else if (primalValue<lower+primalTolerance) {
	status = ClpSimplex::atLowerBound;
      }
      setRowStatus(iRow,status);
    }
    if (primalValue>upper+primalTolerance) {
      sumPrimalInfeasibilities_ += primalValue-upper-primalTolerance;
      numberPrimalInfeasibilities_ ++;
    } else if (primalValue<lower-primalTolerance) {
      sumPrimalInfeasibilities_ += lower-primalValue-primalTolerance;
      numberPrimalInfeasibilities_ ++;
    } else {
      switch(status) {
	
      case basic:
      case ClpSimplex::isFixed:
	break;
      case atUpperBound:
	// dual should not be positive
	if (dualValue>dualTolerance) {
	  sumDualInfeasibilities_ += dualValue-dualTolerance_;
	  numberDualInfeasibilities_ ++;
	}
	break;
      case atLowerBound:
	// dual should not be negative
	if (dualValue<-dualTolerance) {
	  sumDualInfeasibilities_ -= dualValue+dualTolerance_;
	  numberDualInfeasibilities_ ++;
	}
	break;
      case superBasic:
      case isFree:
	if (primalValue<upper-primalTolerance) {
	  // dual should not be negative
	  if (dualValue<-dualTolerance) {
	    sumDualInfeasibilities_ -= dualValue+dualTolerance_;
	    numberDualInfeasibilities_ ++;
	  }
	}
	if (primalValue>lower+primalTolerance) {
	  // dual should not be positive
	  if (dualValue>dualTolerance) {
	    sumDualInfeasibilities_ += dualValue-dualTolerance_;
	    numberDualInfeasibilities_ ++;
	  }
	}
	break;
      }
    }
  }
  for (iColumn=0;iColumn<numberColumns_;iColumn++) {
    double dualValue = reducedCost_[iColumn]*maxmin;
    double primalValue = columnActivity_[iColumn];
    objectiveValue_ += objective[iColumn]*primalValue;
    double lower = columnLower_[iColumn];
    double upper = columnUpper_[iColumn];
    ClpSimplex::Status status = getColumnStatus(iColumn);
    if (status!=basic&&lower==upper) {
      status = ClpSimplex::isFixed;
      setColumnStatus(iColumn,ClpSimplex::isFixed);
    }
    if (primalValue>upper+primalTolerance) {
      sumPrimalInfeasibilities_ += primalValue-upper-primalTolerance;
      numberPrimalInfeasibilities_ ++;
    } else if (primalValue<lower-primalTolerance) {
      sumPrimalInfeasibilities_ += lower-primalValue-primalTolerance;
      numberPrimalInfeasibilities_ ++;
    } else {
      switch(status) {
	
      case basic:
	// dual should be zero
	if (fabs(dualValue)>10.0*dualTolerance) {
	  sumDualInfeasibilities_ -= dualValue+dualTolerance_;
	  numberDualInfeasibilities_ ++;
	}
	break;
      case ClpSimplex::isFixed:
	break;
      case atUpperBound:
	// dual should not be positive
	if (dualValue>dualTolerance) {
	  sumDualInfeasibilities_ += dualValue-dualTolerance_;
	  numberDualInfeasibilities_ ++;
	}
	break;
      case atLowerBound:
	// dual should not be negative
	if (dualValue<-dualTolerance) {
	  sumDualInfeasibilities_ -= dualValue+dualTolerance_;
	  numberDualInfeasibilities_ ++;
	}
	break;
      case superBasic:
      case isFree:
	if (primalValue<upper-primalTolerance) {
	  // dual should not be negative
	  if (dualValue<-dualTolerance) {
	    sumDualInfeasibilities_ -= dualValue+dualTolerance_;
	    numberDualInfeasibilities_ ++;
	  }
	}
	if (primalValue>lower+primalTolerance) {
	  // dual should not be positive
	  if (dualValue>dualTolerance) {
	    sumDualInfeasibilities_ += dualValue-dualTolerance_;
	    numberDualInfeasibilities_ ++;
	  }
	}
	break;
      }
    }
  }
  objectiveValue_ += objective_->nonlinearOffset();
  // But do direction
  objectiveValue_ *= optimizationDirection_;

  if (!numberDualInfeasibilities_&&
      !numberPrimalInfeasibilities_)
    problemStatus_=0;
  else
    problemStatus_=-1;
}
/*
  When scaling is on it is possible that the scaled problem
  is feasible but the unscaled is not.  Clp returns a secondary
  status code to that effect.  This option allows for a cleanup.
  If you use it I would suggest 1.
  This only affects actions when scaled optimal
  0 - no action
  1 - clean up using dual if primal infeasibility
  2 - clean up using dual if dual infeasibility
  3 - clean up using dual if primal or dual infeasibility
  11,12,13 - as 1,2,3 but use primal
*/
#ifdef COUNT_CLEANUPS
static int n1=0;
static int n2=0;
static int n3=0;
#endif
int
ClpSimplex::cleanup(int cleanupScaling)
{
#ifdef COUNT_CLEANUPS
  n1++;
#endif
  int returnCode=0;
  if (!problemStatus_&&cleanupScaling) {
    int check = cleanupScaling%10;
    bool primal = (secondaryStatus_==2||secondaryStatus_==4);
    bool dual = (secondaryStatus_==3||secondaryStatus_==4);
    if (((check&1)!=0&&primal)||(((check&2)!=0)&&dual)) {
      // need cleanup
      int saveScalingFlag = scalingFlag_;
      // say matrix changed
      whatsChanged_ |= 1;
      scaling(0);
      if (cleanupScaling<10) {
        // dual
        returnCode = this->dual();
      } else {
        // primal
        returnCode = this->primal();
      }
#ifdef COUNT_CLEANUPS
      n2++;
      n3+= numberIterations_;
      //printf("**cleanup took %d iterations\n",numberIterations_);
#endif
      scaling(saveScalingFlag);
    }
  }
  return returnCode;
}
#ifdef COUNT_CLEANUPS
void printHowMany()
{
  printf("There were %d cleanups out of %d solves and %d iterations\n",
         n2,n1,n3);
}
#endif
#ifndef SLIM_CLP
#include "CoinWarmStartBasis.hpp"

// Returns a basis (to be deleted by user)
CoinWarmStartBasis * 
ClpSimplex::getBasis() const
{
  int iRow,iColumn;
  CoinWarmStartBasis * basis = new CoinWarmStartBasis();
  basis->setSize(numberColumns_,numberRows_);

  if (statusExists()) {
    // Flip slacks
    int lookupA[]={0,1,3,2,0,2};
    for (iRow=0;iRow<numberRows_;iRow++) {
      int iStatus = getRowStatus(iRow);
      iStatus = lookupA[iStatus];
      basis->setArtifStatus(iRow,static_cast<CoinWarmStartBasis::Status> (iStatus));
    }
    int lookupS[]={0,1,2,3,0,3};
    for (iColumn=0;iColumn<numberColumns_;iColumn++) {
      int iStatus = getColumnStatus(iColumn);
      iStatus = lookupS[iStatus];
      basis->setStructStatus(iColumn,static_cast<CoinWarmStartBasis::Status> (iStatus));
    }
  }
  return basis;
}
#endif
// Compute objective value from solution
void
ClpSimplex::computeObjectiveValue(bool useInternalArrays)
{
  int iSequence;
  objectiveValue_ = 0.0;
  const double * obj = objective();
  if (!useInternalArrays) {
    for (iSequence=0;iSequence<numberColumns_;iSequence++) {
      double value = columnActivity_[iSequence];
      objectiveValue_ += value*obj[iSequence];
    }
    // But remember direction as we are using external objective
    objectiveValue_ *= optimizationDirection_;
  } else if (!columnScale_) {
    for (iSequence=0;iSequence<numberColumns_;iSequence++) {
      double value = columnActivityWork_[iSequence];
      objectiveValue_ += value*obj[iSequence];
    }
    // But remember direction as we are using external objective
    objectiveValue_ *= optimizationDirection_;
    objectiveValue_ += objective_->nonlinearOffset();
    objectiveValue_ /= (objectiveScale_*rhsScale_);
  } else {
    for (iSequence=0;iSequence<numberColumns_;iSequence++) {
      double scaleFactor = columnScale_[iSequence];
      double valueScaled = columnActivityWork_[iSequence];
      objectiveValue_ += valueScaled*scaleFactor*obj[iSequence];
    }
    // But remember direction as we are using external objective
    objectiveValue_ *= optimizationDirection_;
    objectiveValue_ += objective_->nonlinearOffset();
    objectiveValue_ /= (objectiveScale_*rhsScale_);
  }
}
// Compute minimization objective value from internal solution
double
ClpSimplex::computeInternalObjectiveValue()
{
  int iSequence;
  //double oldObj = objectiveValue_;
  double objectiveValue = 0.0;
  const double * obj = objective();
  if (!columnScale_) {
    for (iSequence=0;iSequence<numberColumns_;iSequence++) {
      double value = solution_[iSequence];
      objectiveValue += value*obj[iSequence];
    }
  } else {
    for (iSequence=0;iSequence<numberColumns_;iSequence++) {
      double value = solution_[iSequence]*columnScale_[iSequence];
      objectiveValue += value*obj[iSequence];
    }
  }
  objectiveValue *= optimizationDirection_/rhsScale_;
  objectiveValue -= dblParam_[ClpObjOffset];
  return objectiveValue;
}
// If user left factorization frequency then compute
void 
ClpSimplex::defaultFactorizationFrequency()
{
  if (factorizationFrequency()==200) {
    // User did not touch preset
    const int cutoff1=10000;
    const int cutoff2=100000;
    const int base=75;
    const int freq0 = 50;
    const int freq1=200;
    const int freq2=400;
    const int maximum=1000;
    int frequency;
    if (numberRows_<cutoff1)
      frequency=base+numberRows_/freq0;
    else if (numberRows_<cutoff2)
      frequency=base+cutoff1/freq0 + (numberRows_-cutoff1)/freq1;
    else
      frequency=base+cutoff1/freq0 + (cutoff2-cutoff1)/freq1 + (numberRows_-cutoff2)/freq2;
    setFactorizationFrequency(CoinMin(maximum,frequency));
  }
}
// Gets clean and emptyish factorization
ClpFactorization * 
ClpSimplex::getEmptyFactorization()
{
  if ((specialOptions_&65536)==0) {
    assert (!factorization_);
    factorization_=new ClpFactorization();
  } else if (!factorization_) {
    factorization_=new ClpFactorization();
    factorization_->setPersistenceFlag(1);
  } 
  return factorization_;
}
// May delete or may make clean and emptyish factorization
void 
ClpSimplex::setEmptyFactorization()
{
  if (factorization_) {
    factorization_->cleanUp();
    if ((specialOptions_&65536)==0) {
      delete factorization_;
      factorization_=NULL;
    } else if (factorization_) {
      factorization_->almostDestructor();
    }
  }
}
/* Array persistence flag
   If 0 then as now (delete/new)
   1 then only do arrays if bigger needed
   2 as 1 but give a bit extra if bigger needed
*/
void 
ClpSimplex::setPersistenceFlag(int value)
{
  if (value) {
    //specialOptions_|=65536;
    startPermanentArrays();
  } else {
    specialOptions_&=~65536;
  }
  if (factorization_)
    factorization_->setPersistenceFlag(value);
}
// Move status and solution across
void 
ClpSimplex::moveInfo(const ClpSimplex & rhs, bool justStatus)
{
  objectiveValue_ = rhs.objectiveValue_;
  numberIterations_ = rhs. numberIterations_;
  problemStatus_ = rhs. problemStatus_;
  secondaryStatus_ = rhs. secondaryStatus_;
  if (numberRows_ == rhs.numberRows_ && numberColumns_ == rhs.numberColumns_&& !justStatus) {
    if (rhs.status_) {
      if (status_)
	CoinMemcpyN(rhs.status_,numberRows_+numberColumns_,status_);
      else
	status_ = CoinCopyOfArray(rhs.status_,numberRows_+numberColumns_);
    } else {
      delete [] status_;
      status_ = NULL;
    }
    CoinMemcpyN(rhs.columnActivity_,numberColumns_,columnActivity_);
    CoinMemcpyN(rhs.reducedCost_,numberColumns_,reducedCost_);
    CoinMemcpyN(rhs.rowActivity_,numberRows_,rowActivity_);
    CoinMemcpyN(rhs.dual_,numberRows_,dual_);
  }
}
// Save a copy of model with certain state - normally without cuts
void 
ClpSimplex::makeBaseModel()
{
  delete baseModel_;
  baseModel_ = new ClpSimplex(*this);
}
// Switch off base model
void 
ClpSimplex::deleteBaseModel()
{
  delete baseModel_;
  baseModel_=NULL;
}
// Reset to base model
void 
ClpSimplex::setToBaseModel(ClpSimplex * model)
{
  if (!model)
    model=baseModel_;
  assert (model);
  int multiplier = ((model->specialOptions_&65536)!=0) ? 2 : 1;
  assert (multiplier==2);
  if (multiplier==2) {
    assert (model->maximumRows_>=0);
    if (maximumRows_<0) {
      specialOptions_ |= 65536;
      maximumRows_ = model->maximumRows_;
      maximumColumns_ = model->maximumColumns_;
    }
  }
  printf("resetbase a %d rows, %d maximum rows\n",
	     numberRows_,maximumRows_);
  // temporary - later use maximumRows_ for rowUpper_ etc
  assert (numberRows_>=model->numberRows_);
  abort();
}
// Start or reset using maximumRows_ and Columns_
bool
ClpSimplex::startPermanentArrays()
{
  int maximumRows = maximumRows_;
  int maximumColumns = maximumColumns_;
  ClpModel::startPermanentArrays();
  if (maximumRows!=maximumRows_||
      maximumColumns!=maximumColumns_) {
#if 0
    maximumInternalRows_ = maximumRows_;
    maximumInternalColumns_ = maximumColumns_;
    int numberTotal2 = (maximumRows_+maximumColumns_)*2;
    delete [] cost_;
    cost_ = new double[numberTotal2];
    delete [] lower_;
    delete [] upper_;
    lower_ = new double[numberTotal2];
    upper_ = new double[numberTotal2];
    delete [] dj_;
    dj_ = new double[numberTotal2];
    delete [] solution_;
    solution_ = new double[numberTotal2];
    assert (scalingFlag_>0);
    if (rowScale_&&rowScale_!=savedRowScale_)
      delete [] rowScale_;
    rowScale_=NULL;
    // Do initial scaling
    delete [] savedRowScale_;
    savedRowScale_ = new double [4*maximumRows_];
    delete [] savedColumnScale_;
    savedColumnScale_ = new double [4*maximumColumns_];
    if (scalingFlag_>0) {
      rowScale_ = savedRowScale_;
      columnScale_ = savedColumnScale_;
      if (matrix_->scale(this)) {
	scalingFlag_=-scalingFlag_; // not scaled after all
	assert (!rowScale_);
      }
      int numberRows2 = numberRows_+numberExtraRows_;
      if (rowScale_) {
	CoinMemcpyN(rowScale_,2*numberRows2,savedRowScale_+2*maximumRows_);
	CoinMemcpyN(columnScale_,2*numberColumns_,savedColumnScale_+2*maximumColumns_);
      } else {
	abort();
	CoinFillN(savedRowScale_+2*maximumRows_,2*numberRows2,1.0);
	CoinFillN(savedColumnScale_+2*maximumColumns_,2*numberColumns_,1.0);
      }
    }
#else
    createRim(63);
#endif
    return true;
  } else {
    return false;
  }
}
#include "ClpNode.hpp"
// Fathom - 1 if solution
int 
ClpSimplex::fathom(void * stuff)
{
  assert (stuff);
  ClpNodeStuff * info = reinterpret_cast<ClpNodeStuff *> (stuff);
  info->nNodes_=0;
  // say can declare optimal
  moreSpecialOptions_ |= 8;
  int saveMaxIterations = maximumIterations();
  setMaximumIterations(100+5*(numberRows_+numberColumns_));
#if 0
  bool onOptimal=true;
  double optVal[133];
  {
    memset(optVal,0,sizeof(optVal));
#if 0
    int intIndicesV[]={61,62,65,66,67,68,69,70};
    double intSolnV[] = {4.,21.,4.,4.,6.,1.,25.,8.};
    int vecLen = sizeof(intIndicesV)/sizeof(int);
    for (int i=0;i<vecLen;i++) {
      optVal[intIndicesV[i]]=intSolnV[i];
    }
#else
    int intIndicesAt1[]={ 0,18,25,36,44,59,61,77,82,93 };
    int vecLen = sizeof(intIndicesAt1)/sizeof(int);
    for (int i=0;i<vecLen;i++) {
      optVal[intIndicesAt1[i]]=1;
    }
#endif
  }
  if (numberColumns_==-100) {
    const char * integerType = integerInformation();
    for (int i=0;i<100;i++) {
      if (integerType[i]) {
	if (columnLower_[i]>optVal[i]||columnUpper_[i]<optVal[i]) {
	  onOptimal=false;
	  break;
	}
      }
    }
    if (onOptimal)
      printf("On optimal path fathom\n");
  }
#endif
  if (info->presolveType_) {
    // crunch down
    bool feasible=true;
    // Use dual region
    double * rhs = dual_;
    int * whichRow = new int[3*numberRows_];
    int * whichColumn = new int[2*numberColumns_];
    int nBound;
    bool tightenBounds = ((specialOptions_&64)==0) ? false : true; 
    ClpSimplex * small = 
      static_cast<ClpSimplexOther *> (this)->crunch(rhs,whichRow,whichColumn,
					 nBound,false,tightenBounds);
    if (small) {
      //double limit = 0.0;
      //getDblParam(ClpDualObjectiveLimit, limit);
      //printf("objlimit a %g",limit);
      //small->getDblParam(ClpDualObjectiveLimit, limit);
      //printf(" %g\n",limit);
      // pack down pseudocosts
      if (info->upPseudo_) {
	const char * integerType2 = small->integerInformation();
	int n=small->numberColumns();
	int k=0;
	int jColumn=0;
	int j=0;
	for (int i=0;i<n;i++) {
	  if (integerType2[i]) {
	    int iColumn = whichColumn[i];
	    // find
	    while (jColumn!=iColumn) {
	      if (integerType_[jColumn])
		j++;
	      jColumn++;
	    }
	    info->priority_[k]=info->priority_[j];
	    info->upPseudo_[k]=info->upPseudo_[j];
	    info->numberUp_[k]=info->numberUp_[j];
	    info->numberUpInfeasible_[k]=info->numberUpInfeasible_[j];
	    info->downPseudo_[k]=info->downPseudo_[j];
	    info->numberDown_[k]=info->numberDown_[j];
	    info->numberDownInfeasible_[k]=info->numberDownInfeasible_[j];
	    assert (info->upPseudo_[k]>1.0e-40&&info->upPseudo_[k]<1.0e40);
	    assert (info->downPseudo_[k]>1.0e-40&&info->downPseudo_[k]<1.0e40);
	    k++;
	  }
	}
      }
#if 0
      small->dual();
      if (small->problemStatus()==0) {
	//problemStatus_ = 0;
      } else if (small->problemStatus()!=3) {
	feasible=false;
      } else {
	if (small->problemStatus_==3) {
	  // may be problems
	  printf("need coding from OsiClp for crunch\n");
	  abort();
	}
      }
#endif
    } else {
      feasible=false;
    }
    int returnCode=0;
    if (feasible) {
      info->presolveType_=0;
      // save and move pseudo costs
      returnCode= small->fathom(stuff);
      // restore pseudocosts
      if (info->upPseudo_) {
	int n=small->numberColumns();
	int * back = new int [numberColumns_];
	int numberIntegers=0;
	for (int i=0;i<numberColumns_;i++) {
	  if (integerType_[i]) { 
	    back[i]=-10-numberIntegers;
	    numberIntegers++;
	  } else {
	    back[i]=-1;
	  }
	}
	const char * integerType2 = small->integerInformation();
	int numberIntegers2=0;
	for (int i=0;i<n;i++) {
	  int iColumn = whichColumn[i];
	  if (integerType2[i]) {
	    int iBack = -back[iColumn];
	    assert (iBack>=10);
	    iBack -= 10;
	    back[iColumn]=iBack;
	    numberIntegers2++;
	  }
	}
	int k=numberIntegers2;
	for (int i=numberColumns_-1;i>=0;i--) {
	  int iBack = back[i];
	  if (iBack<=-10) {
	    // fixed integer
	    numberIntegers--;
	    info->numberUp_[numberIntegers]=-1; // say not updated
	  } else if (iBack>=0) {
	    // not fixed integer
	    numberIntegers--;
	    k--;
	    assert (info->upPseudo_[k]>1.0e-40&&info->upPseudo_[k]<1.0e40);
	    assert (info->downPseudo_[k]>1.0e-40&&info->downPseudo_[k]<1.0e40);
	    info->upPseudo_[numberIntegers]=info->upPseudo_[k];
	    info->numberUp_[numberIntegers]=info->numberUp_[k];
	    info->numberUpInfeasible_[numberIntegers]=info->numberUpInfeasible_[k];
	    info->downPseudo_[numberIntegers]=info->downPseudo_[k];
	    info->numberDown_[numberIntegers]=info->numberDown_[k];
	    info->numberDownInfeasible_[numberIntegers]=info->numberDownInfeasible_[k];
	  }
	}
	delete [] back;
      }
      if (returnCode) {
	bool fixBounds = (info->nNodes_>=0) ? true : false;
	//check this does everything
	static_cast<ClpSimplexOther *> (this)->afterCrunch(*small,
						whichRow,whichColumn,nBound);
	bool badSolution=false;
	for (int i=0;i<numberColumns_;i++) {
	  if (integerType_[i]) { 
	    double value = columnActivity_[i];
	    double value2 = floor(value+0.5);
	    if (fabs(value-value2)>=1.0e-4) {
	      // Very odd - can't use
	      badSolution=true;
	    }
	    columnActivity_[i]=value2;
	    if (fixBounds) {
	      columnLower_[i]=value2;
	      columnUpper_[i]=value2;
	    }
	  }
	}
	if (badSolution) {
	  info->nNodes_=-1;
	  returnCode=0;
	}
	//setLogLevel(63);
	//double objectiveValue=doubleCheck();
	//printf("Solution of %g\n",objectiveValue);
      }
      delete small;
    }
    delete [] whichRow;
    delete [] whichColumn;
    setMaximumIterations(saveMaxIterations);
    return returnCode;
  }
  int returnCode = startFastDual2(info);
  if (returnCode) {
    stopFastDual2(info);
    setMaximumIterations(saveMaxIterations);
    return returnCode;
  }
  // Get fake bounds correctly
  //(static_cast<ClpSimplexDual *>(this))->resetFakeBounds(1);
  gutsOfSolution ( NULL,NULL);
  double dummyChange;
  (static_cast<ClpSimplexDual *>(this))->changeBounds(3,NULL,dummyChange);
  int saveNumberFake = numberFake_;
  int status=fastDual2(info);
#if 0
  {
    int iPivot;
    double * array = rowArray_[3]->denseVector();
    int i;
    for (iPivot=0;iPivot<numberRows_;iPivot++) {
      int iSequence = pivotVariable_[iPivot];
      unpack(rowArray_[3],iSequence);
      factorization_->updateColumn(rowArray_[2],rowArray_[3]);
      assert (fabs(array[iPivot]-1.0)<1.0e-4);
      array[iPivot]=0.0;
      for (i=0;i<numberRows_;i++)
	assert (fabs(array[i])<1.0e-4);
      rowArray_[3]->clear();
    }
  }
#endif
  CoinAssert (problemStatus_||objectiveValue_<1.0e50);
  if (status&&problemStatus_!=3) {
    // not finished - might be optimal
    checkPrimalSolution(rowActivityWork_,columnActivityWork_);
    double limit = 0.0;
    getDblParam(ClpDualObjectiveLimit, limit);
    //printf("objlimit b %g\n",limit);
    if (!numberPrimalInfeasibilities_&&objectiveValue()*optimizationDirection_<limit) { 
      problemStatus_=0;
    } 
    status=problemStatus_;
  }
  if (problemStatus_!=0&&problemStatus_!=1) {
#ifdef COIN_DEVELOP
    printf("bad status %d on initial fast dual %d its\n",problemStatus_,
	   numberIterations_);
#endif
    info->nNodes_=-1;
    setMaximumIterations(saveMaxIterations);
    return 0;
  }
  int numberNodes=1;
  int numberIterations=numberIterations_;
#ifdef COIN_DEVELOP
  int printFrequency=1000;
#endif
  if (problemStatus_==1) {
    //printf("fathom infeasible on initial\n");
    stopFastDual2(info);
    info->numberNodesExplored_ = 1;
    info->numberIterations_ = numberIterations;
    setMaximumIterations(saveMaxIterations);
    return 0;
  } else if (problemStatus_!=0) {
    stopFastDual2(info);
    info->numberNodesExplored_ = 1;
    info->numberIterations_ = numberIterations;
    setMaximumIterations(saveMaxIterations);
    // say bad
    info->nNodes_=-1;
    return 0;
  }
  if (!columnScale_) {
    CoinMemcpyN(solution_,numberColumns_,columnActivity_);
  } else {
    assert(columnActivity_);
    assert(columnScale_);
    assert(solution_);
    int j;
    for (j=0;j<numberColumns_;j++) 
      columnActivity_[j] = solution_[j]*columnScale_[j];
  }
  double increment=info->integerIncrement_;
  int maxDepthSize=10;
  int maxDepth=0;
  int depth=0;
  // Get fake bounds correctly
  (static_cast<ClpSimplexDual *>(this))->changeBounds(3,NULL,dummyChange);
  saveNumberFake = numberFake_;
  ClpNode ** nodes = new ClpNode * [maxDepthSize];
  int numberTotal = numberRows_+numberColumns_;
  double * saveLower = CoinCopyOfArray(columnLower_,numberColumns_);
  double * saveUpper = CoinCopyOfArray(columnUpper_,numberColumns_);
  double * saveLowerInternal = CoinCopyOfArray(lower_,numberTotal);
  double * saveUpperInternal = CoinCopyOfArray(upper_,numberTotal);
  double * bestLower = NULL;
  double * bestUpper = NULL;
  int * back = new int [numberColumns_];
  int numberIntegers=0;
  double sumChanges=1.0e-5;
  int numberChanges=1;
  for (int i=0;i<numberColumns_;i++) {
    if (integerType_[i])
      back[i]=numberIntegers++;
    else
      back[i]=-1;
  }
  unsigned char * bestStatus = NULL;
  double bestObjective;
  getDblParam(ClpDualObjectiveLimit, bestObjective);
  double saveBestObjective = bestObjective;
  bool backtrack=false;
  bool printing = handler_->logLevel()>0;
  while (depth>=0) {
    // If backtrack get to correct depth
    if (backtrack) {
      depth--;
      while (depth>=0) {
	if (!nodes[depth]->fathomed()) {
	  nodes[depth]->changeState();
	  break;
	}
	//if (printing)
	//printf("deleting node at depth %d\n",depth);
	//delete nodes[depth];
	//nodes[depth]=NULL;
	depth--;
      }
      if (depth<0)
	break;
      // apply
      // First if backtracking we need to restore factorization, bounds and weights
      CoinMemcpyN(saveLowerInternal,numberTotal,lower_);
      CoinMemcpyN(saveUpperInternal,numberTotal,upper_);
      CoinMemcpyN(saveLower,numberColumns_,columnLower_);
      CoinMemcpyN(saveUpper,numberColumns_,columnUpper_);
      for (int i=0;i<depth;i++) {
	nodes[i]->applyNode(this,0);
      }
      nodes[depth]->applyNode(this,1);
      int iColumn = nodes[depth]->sequence();
      if (printing)
	printf("after backtracking - applying node at depth %d - variable %d (%g,%g)\n",
	       depth,iColumn,
	       columnLower_[iColumn],columnUpper_[iColumn]);
      depth++;
    } else {
      // just bounds
      if (depth>0) {
	nodes[depth-1]->applyNode(this,0);
	int iColumn = nodes[depth-1]->sequence();
	if (printing)
	  printf("No backtracking - applying node at depth-m %d - variable %d (%g,%g)\n",
		 depth-1,iColumn,
		 columnLower_[iColumn],columnUpper_[iColumn]);
      }
    }
    // solve
#if 0
    {
      int iPivot;
      double * array = rowArray_[3]->denseVector();
      int i;
      for (iPivot=0;iPivot<numberRows_;iPivot++) {
	int iSequence = pivotVariable_[iPivot];
	unpack(rowArray_[3],iSequence);
	factorization_->updateColumn(rowArray_[2],rowArray_[3]);
	assert (fabs(array[iPivot]-1.0)<1.0e-4);
	array[iPivot]=0.0;
	for (i=0;i<numberRows_;i++)
	  assert (fabs(array[i])<1.0e-4);
	rowArray_[3]->clear();
      }
    }
#endif
    // Get fake bounds correctly
    (static_cast<ClpSimplexDual *>(this))->changeBounds(3,NULL,dummyChange);
    fastDual2(info);
#if 0
    {
      int iPivot;
      double * array = rowArray_[3]->denseVector();
      int i;
      for (iPivot=0;iPivot<numberRows_;iPivot++) {
	int iSequence = pivotVariable_[iPivot];
	unpack(rowArray_[3],iSequence);
	factorization_->updateColumn(rowArray_[2],rowArray_[3]);
	assert (fabs(array[iPivot]-1.0)<1.0e-4);
	array[iPivot]=0.0;
	for (i=0;i<numberRows_;i++)
	  assert (fabs(array[i])<1.0e-4);
	rowArray_[3]->clear();
      }
    }
#endif
    // give up if odd
    if (problemStatus_>1) {
      info->nNodes_ =-1;
#ifdef COIN_DEVELOP
      printf("OUCH giving up on loop! %d %d %d %d\n",
	     numberNodes,numberIterations,problemStatus_,numberIterations_);
      printf("xx %d\n",numberIterations*(numberRows_+numberColumns_));
      //abort();
#endif
      break;
    }
    numberNodes++;
    numberIterations += numberIterations_;
    if ((numberNodes%1000)==0) {
#ifdef COIN_DEVELOP
      if ((numberNodes%printFrequency)==0) {
	printf("After %d nodes (%d iterations) - best solution %g - current depth %d\n",
	       numberNodes,numberIterations,bestObjective,depth);
	printFrequency *= 2;
      }
#endif
      if (numberIterations*(numberRows_+numberColumns_)>5.0e8||
	  numberNodes>1.0e6) {
	// give up
	info->nNodes_ =-1;
#ifdef COIN_DEVELOP
	printf("OUCH giving up on nodes %d %d\n",numberNodes,numberIterations);
	printf("xx %d\n",numberIterations*(numberRows_+numberColumns_));
	//abort();
#endif
	break;
      }
    }
    if (problemStatus_==1||
	(problemStatus_==0&&objectiveValue()*optimizationDirection_>bestObjective)) {
      backtrack=true;
      if (printing)
	printf("infeasible at depth %d\n",depth);
      if (depth>0) {
	int way=nodes[depth-1]->way();
	int sequence = nodes[depth-1]->sequence();
#ifndef NDEBUG
	double branchingValue = nodes[depth-1]->branchingValue();
	if (way>0)
	  assert (columnLower_[sequence]==ceil(branchingValue));
	else
	  assert (columnUpper_[sequence]==floor(branchingValue));
#endif
	sequence = back[sequence];
	double change = bestObjective-nodes[depth-1]->objectiveValue();
	if (change>1.0e10)
	  change= 10.0*sumChanges/(1.0+numberChanges);
	info->update(way,sequence,change,false);
      }
    } else if (problemStatus_!=0) {
      abort();
    } else {
      // Create node
      ClpNode * node;
      computeDuals(NULL);
      if (depth>0) {
	int way=nodes[depth-1]->way();
	int sequence = nodes[depth-1]->sequence();
#ifndef NDEBUG
	double branchingValue = nodes[depth-1]->branchingValue();
	if (way>0)
	  assert (columnLower_[sequence]==ceil(branchingValue));
	else
	  assert (columnUpper_[sequence]==floor(branchingValue));
#endif
	sequence = back[sequence];
	info->update(way,sequence,
		     objectiveValue()-nodes[depth-1]->objectiveValue(),
		     true);
	numberChanges++;
	sumChanges += objectiveValue()-nodes[depth-1]->objectiveValue();
      }
      if (depth<maxDepth) {
	node = nodes[depth];
	node->gutsOfConstructor(this,info,1,depth);
      } else {
	node = new ClpNode(this,info,depth);
	if (depth==maxDepthSize) {
	  maxDepthSize = 2*maxDepthSize+10;
	  ClpNode ** temp = new ClpNode * [maxDepthSize];
	  for (int i=0;i<depth;i++) 
	    temp[i]=nodes[i];
	  delete [] nodes;
	  nodes = temp;
	}
	nodes[maxDepth++]=node;
      }
#if 0
    if (numberColumns_==133&&onOptimal) {
      const char * integerType = integerInformation();
      for (int i=0;i<133;i++) {
	if (integerType[i]) {
	  if (columnLower_[i]>optVal[i]||columnUpper_[i]<optVal[i]) {
	    onOptimal=false;
	    printf("bad %d %g %g %g\n",i,columnLower_[i],optVal[i],
		   columnUpper_[i]);
	  }
	}
      }
      assert (onOptimal);
    }
#endif
      if (node->sequence()<0) {
	// solution
	double objectiveValue=doubleCheck();
#ifdef COIN_DEVELOP
	printf("Solution of %g after %d nodes at depth %d\n",
	       objectiveValue,numberNodes,depth);
#endif
	if (objectiveValue<bestObjective) {
	  ClpNode node2(this,info,depth);
	  assert (node2.sequence()<0);
	  // later then lower_ not columnLower_ (and total?)
	  delete [] bestLower;
	  bestLower = CoinCopyOfArray(columnLower_,numberColumns_);
	  delete [] bestUpper;
	  bestUpper = CoinCopyOfArray(columnUpper_,numberColumns_);
	  delete [] bestStatus;
	  bestStatus = CoinCopyOfArray(status_,numberTotal);
	  bestObjective = objectiveValue-increment;
	  setDblParam(ClpDualObjectiveLimit,bestObjective*optimizationDirection_);
	} else {
	  //#define CLP_INVESTIGATE
#ifdef CLP_INVESTIGATE
	  printf("why bad solution feasible\n");
#endif
	}
	//delete node;
	backtrack=true;
      } else {
	if (printing)
	  printf("depth %d variable %d\n",depth,node->sequence());
	depth++;
	backtrack=false;
	//nodes[depth++] = new ClpNode (this,info);
      }
    }
  }
  if (!info->nNodes_)
    assert (depth==-1);
  for (int i=0;i<maxDepth;i++)
    delete nodes[i];
  delete [] nodes;
  delete [] back;
  stopFastDual2(info);
  //printf("fathom finished after %d nodes\n",numberNodes);
  if (bestStatus) {
    CoinMemcpyN(bestLower,numberColumns_,columnLower_);
    CoinMemcpyN(bestUpper,numberColumns_,columnUpper_);
    CoinMemcpyN(bestStatus,numberTotal,status_);
    delete [] bestLower;
    delete [] bestUpper;
    delete [] bestStatus;
    setDblParam(ClpDualObjectiveLimit, saveBestObjective);
    int saveOptions=specialOptions_;
    specialOptions_&=~65536;
    dual();
    specialOptions_=saveOptions;
    info->numberNodesExplored_ = numberNodes;
    info->numberIterations_ = numberIterations;
    returnCode = 1;
  } else {
    info->numberNodesExplored_ = numberNodes;
    info->numberIterations_ = numberIterations;
    returnCode = 0;
  }
  if (info->nNodes_<0) {
    if (lower_) {
      CoinMemcpyN(saveLowerInternal,numberTotal,lower_);
      CoinMemcpyN(saveUpperInternal,numberTotal,upper_);
      numberFake_ = saveNumberFake;
    }
    CoinMemcpyN(saveLower,numberColumns_,columnLower_);
    CoinMemcpyN(saveUpper,numberColumns_,columnUpper_);
  }
  delete [] saveLower;
  delete [] saveUpper;
  delete [] saveLowerInternal;
  delete [] saveUpperInternal;
  setMaximumIterations(saveMaxIterations);
  return returnCode;
}
//#define CHECK_PATH
#ifdef CHECK_PATH
const double * debuggerSolution_Z=NULL;
int numberColumns_Z=-1;
int gotGoodNode_Z=-1;
#endif
/* Do up to N deep - returns 
   -1 - no solution nNodes_ valid nodes
   >= if solution and that node gives solution
   ClpNode array is 2**N long.  Values for N and 
   array are in stuff (nNodes_ also in stuff) */
int 
ClpSimplex::fathomMany(void * stuff)
{
  assert (stuff);
  ClpNodeStuff * info = reinterpret_cast<ClpNodeStuff *> (stuff);
  int nNodes = info->maximumNodes();
  int putNode = info->maximumSpace();
  int goodNodes=0;
  info->nNodes_=0;
  ClpNode ** nodeInfo = info->nodeInfo_;
  assert (nodeInfo);
  // say can declare optimal
  moreSpecialOptions_ |= 8;
  double limit = 0.0;
  getDblParam(ClpDualObjectiveLimit, limit);
  for (int j=0;j<putNode;j++) {
    if (nodeInfo[j]) {
      nodeInfo[j]->setObjectiveValue(limit);
      if (info->large_)
	nodeInfo[j]->cleanUpForCrunch();
    }
  }
#ifdef CHECK_PATH
  // Note - if code working can get assert on startOptimal==2 (if finds)
  int startOptimal=0;
  if (numberColumns_==numberColumns_Z) {
    assert (debuggerSolution_Z);
    startOptimal=1;
    for (int i=0;i<numberColumns_;i++) {
      if (columnUpper_[i]<debuggerSolution_Z[i]||columnLower_[i]>debuggerSolution_Z[i]) {
	startOptimal=0;
	break;
      }
    }
    if (startOptimal) {
      printf("starting on optimal\n");
    }
  } else if (info->large_&&info->large_->numberColumns_==numberColumns_Z) {
    assert (debuggerSolution_Z);
    startOptimal=1;
    for (int i=0;i<info->large_->numberColumns_;i++) {
      if (info->large_->columnUpper_[i]<debuggerSolution_Z[i]||info->large_->columnLower_[i]>debuggerSolution_Z[i]) {
	startOptimal=0;
	break;
      }
    }
    if (startOptimal) {
      printf("starting on optimal (presolved) %d\n",numberColumns_);
    }
  }
#endif
  int whichSolution=-1;
  if (info->presolveType_) {
    // crunch down
    bool feasible=true;
    // Use dual region
    double * rhs = dual_;
    int * whichRow = new int[3*numberRows_];
    int * whichColumn = new int[2*numberColumns_];
    int nBound;
    bool tightenBounds = ((specialOptions_&64)==0) ? false : true; 
    ClpSimplex * small = 
      static_cast<ClpSimplexOther *> (this)->crunch(rhs,whichRow,whichColumn,
					 nBound,false,tightenBounds);
    if (small) {
      info->large_=this;
      info->whichRow_ = whichRow;
      info->whichColumn_ = whichColumn;
      info->nBound_ = nBound;
      //double limit = 0.0;
      //getDblParam(ClpDualObjectiveLimit, limit);
      //printf("objlimit a %g",limit);
      //small->getDblParam(ClpDualObjectiveLimit, limit);
      //printf(" %g\n",limit);
      // pack down pseudocosts
      if (info->upPseudo_) {
	const char * integerType2 = small->integerInformation();
	int n=small->numberColumns();
	int k=0;
	int jColumn=0;
	int j=0;
	for (int i=0;i<n;i++) {
	  if (integerType2[i]) {
	    int iColumn = whichColumn[i];
	    // find
	    while (jColumn!=iColumn) {
	      if (integerType_[jColumn])
		j++;
	      jColumn++;
	    }
	    info->upPseudo_[k]=info->upPseudo_[j];
	    info->numberUp_[k]=info->numberUp_[j];
	    info->numberUpInfeasible_[k]=info->numberUpInfeasible_[j];
	    info->downPseudo_[k]=info->downPseudo_[j];
	    info->numberDown_[k]=info->numberDown_[j];
	    info->numberDownInfeasible_[k]=info->numberDownInfeasible_[j];
	    assert (info->upPseudo_[k]>1.0e-40&&info->upPseudo_[k]<1.0e40);
	    assert (info->downPseudo_[k]>1.0e-40&&info->downPseudo_[k]<1.0e40);
	    k++;
	  }
	}
      }
    } else {
      feasible=false;
    }
    if (feasible) {
      info->presolveType_=0;
      // save and move pseudo costs
      whichSolution = small->fathomMany(stuff);
      // restore pseudocosts
      if (info->upPseudo_) {
	int n=small->numberColumns();
	int * back = new int [numberColumns_];
	int numberIntegers=0;
	for (int i=0;i<numberColumns_;i++) {
	  if (integerType_[i]) { 
	    back[i]=-10-numberIntegers;
	    numberIntegers++;
	  } else {
	    back[i]=-1;
	  }
	}
	const char * integerType2 = small->integerInformation();
	int numberIntegers2=0;
	for (int i=0;i<n;i++) {
	  int iColumn = whichColumn[i];
	  if (integerType2[i]) {
	    int iBack = -back[iColumn];
	    assert (iBack>=10);
	    iBack -= 10;
	    back[iColumn]=iBack;
	    numberIntegers2++;
	  }
	}
	int k=numberIntegers2;
	for (int i=numberColumns_-1;i>=0;i--) {
	  int iBack = back[i];
	  if (iBack<=-10) {
	    // fixed integer
	    numberIntegers--;
	    info->numberUp_[numberIntegers]=-1; // say not updated
	  } else if (iBack>=0) {
	    // not fixed integer
	    numberIntegers--;
	    k--;
	    assert (info->upPseudo_[k]>1.0e-40&&info->upPseudo_[k]<1.0e40);
	    assert (info->downPseudo_[k]>1.0e-40&&info->downPseudo_[k]<1.0e40);
	    info->upPseudo_[numberIntegers]=info->upPseudo_[k];
	    info->numberUp_[numberIntegers]=info->numberUp_[k];
	    info->numberUpInfeasible_[numberIntegers]=info->numberUpInfeasible_[k];
	    info->downPseudo_[numberIntegers]=info->downPseudo_[k];
	    info->numberDown_[numberIntegers]=info->numberDown_[k];
	    info->numberDownInfeasible_[numberIntegers]=info->numberDownInfeasible_[k];
	  }
	}
	delete [] back;
      }
      delete small;
    }
    info->large_=NULL;
    info->whichRow_ = NULL;
    info->whichColumn_ = NULL;
    delete [] whichRow;
    delete [] whichColumn;
    return whichSolution;
  }
#ifndef DEBUG
  {
    int nBasic=0;
    int i;
    for (i=0;i<numberRows_+numberColumns_;i++) {
      if (getColumnStatus(i)==basic)
	nBasic++;
    }
    assert (nBasic==numberRows_);
  }
#endif
  int returnCode = startFastDual2(info);
  if (returnCode) {
    stopFastDual2(info);
    abort();
    return -1;
  }
  gutsOfSolution ( NULL,NULL);
  int status=fastDual2(info);
  CoinAssert (problemStatus_||objectiveValue_<1.0e50);
  if (status&&problemStatus_!=3) {
    // not finished - might be optimal
    checkPrimalSolution(rowActivityWork_,columnActivityWork_);
    double limit = 0.0;
    getDblParam(ClpDualObjectiveLimit, limit);
    //printf("objlimit b %g\n",limit);
    if (!numberPrimalInfeasibilities_&&objectiveValue()*optimizationDirection_<limit) { 
      problemStatus_=0;
    } 
    status=problemStatus_;
  }
  assert (problemStatus_==0||problemStatus_==1);//(static_cast<ClpSimplexDual *> this)->dual(0,0);
  if (problemStatus_==10) {
    printf("Cleaning up with primal - need coding without createRim!\n");
    abort();
  }
  int numberNodes=0;
  int numberIterations=numberIterations_;
  if (problemStatus_==1) {
    //printf("fathom infeasible on initial\n");
    stopFastDual2(info);
    info->nNodes_ = 0;
    info->numberNodesExplored_ = 0;
    info->numberIterations_ = numberIterations;
    return -1;
  } else if (problemStatus_!=0) {
    abort();
  }
  if (!columnScale_) {
    CoinMemcpyN(solution_,numberColumns_,columnActivity_);
  } else {
    assert(columnActivity_);
    assert(columnScale_);
    assert(solution_);
    int j;
    for (j=0;j<numberColumns_;j++) 
      columnActivity_[j] = solution_[j]*columnScale_[j];
  }
  double increment=info->integerIncrement_;
  int depth=0;
  int numberTotal = numberRows_+numberColumns_;
  double * saveLower = CoinCopyOfArray(columnLower_,numberColumns_);
  double * saveUpper = CoinCopyOfArray(columnUpper_,numberColumns_);
  double * saveLowerInternal = CoinCopyOfArray(lower_,numberTotal);
  double * saveUpperInternal = CoinCopyOfArray(upper_,numberTotal);
  //double * bestLower = NULL;
  //double * bestUpper = NULL;
  int * back = new int [numberColumns_];
  int numberIntegers=0;
  double sumChanges=1.0e-5;
  int numberChanges=1;
  for (int i=0;i<numberColumns_;i++) {
    if (integerType_[i])
      back[i]=numberIntegers++;
    else
      back[i]=-1;
  }
  //unsigned char * bestStatus = NULL;
  double bestObjective;
  getDblParam(ClpDualObjectiveLimit, bestObjective);
  double saveBestObjective = bestObjective;
  bool backtrack=false;
  bool printing = handler_->logLevel()>0;
#ifdef CHECK_PATH
  if (startOptimal)
    printing=true;
#endif
  /* Use nodeInfo for storage
     depth 0 will be putNode-1, 1 putNode-2 etc */
  int useDepth=putNode-1;
  bool lastFeasible=true;
  bool justDive = (info->solverOptions_&32)!=0;
  //printf("putNode %d nDepth %d\n");
  while (depth>=0) {
    bool stopAtOnce=false;
    // If backtrack get to correct depth
    if (backtrack) {
      depth--;
      useDepth++;
      while (depth>=0) {
	if (!nodeInfo[useDepth]->fathomed()) {
	  nodeInfo[useDepth]->changeState();
	  break;
	}
	//if (printing)
	//printf("deleting node at depth %d\n",depth);
	//delete nodes[useDepth];
	//nodes[useDepth]=NULL;
	depth--;
	useDepth++;
      }
      if (depth<0)
	break;
      // apply
      // First if backtracking we need to restore factorization, bounds and weights
      CoinMemcpyN(saveLowerInternal,numberTotal,lower_);
      CoinMemcpyN(saveUpperInternal,numberTotal,upper_);
      CoinMemcpyN(saveLower,numberColumns_,columnLower_);
      CoinMemcpyN(saveUpper,numberColumns_,columnUpper_);
      for (int i=0;i<depth;i++) {
	nodeInfo[putNode-1-i]->applyNode(this,0);
      }
      nodeInfo[useDepth]->applyNode(this,1);
      if (justDive)
	stopAtOnce=true;
      int iColumn = nodeInfo[useDepth]->sequence();
      if (printing)
	printf("after backtracking - applying node at depth %d - variable %d (%g,%g)\n",
	       depth,iColumn,
	       columnLower_[iColumn],columnUpper_[iColumn]);
      depth++;
      useDepth--;
    } else {
      // just bounds
      if (depth>0) {
	// Choose variable here!!
	nodeInfo[useDepth+1]->chooseVariable(this,info);
	nodeInfo[useDepth+1]->applyNode(this,0);
	int iColumn = nodeInfo[useDepth+1]->sequence();
	if (printing)
	  printf("No backtracking - applying node at depth-m %d - variable %d (%g,%g)\n",
		 depth-1,iColumn,
		 columnLower_[iColumn],columnUpper_[iColumn]);
      }
    }
    // solve
    double dummyChange;
    (static_cast<ClpSimplexDual *>(this))->changeBounds(3,NULL,dummyChange);
    //int saveNumberFake = numberFake_;
    fastDual2(info);
    numberNodes++;
    numberIterations += numberIterations_;
    if ((numberNodes%1000)==0&&printing)
      printf("After %d nodes (%d iterations) - best solution %g - current depth %d\n",
	     numberNodes,numberIterations,bestObjective,depth);
    if (problemStatus_==1||
	(problemStatus_==0&&objectiveValue()*optimizationDirection_>bestObjective)) {
      backtrack=true;
      lastFeasible=false;
      if (printing)
	printf("infeasible at depth %d\n",depth);
#ifdef CHECK_PATH
      if (startOptimal&&numberColumns_==numberColumns_Z) {
	bool onOptimal=true;
	for (int i=0;i<numberColumns_;i++) {
	  if (columnUpper_[i]<debuggerSolution_Z[i]||columnLower_[i]>debuggerSolution_Z[i]) {
	    onOptimal=false;
	    break;
	  }
	}
	if (onOptimal) {
	  printf("INF on optimal fathom at depth %d\n",depth);
	  abort();
	}
      } else if (info->large_&&startOptimal&&info->large_->numberColumns_==numberColumns_Z) {
	bool onOptimal=true;
	for (int i=0;i<info->large_->numberColumns_;i++) {
	  if (info->large_->columnUpper_[i]<debuggerSolution_Z[i]||info->large_->columnLower_[i]>debuggerSolution_Z[i]) {
	    onOptimal=false;
	    break;
	  }
	}
	if (onOptimal) {
	  printf("INF on optimal (pre) fathom at depth %d\n",depth);
	  writeMps("fathom_pre.mps");
	  abort();
	}
      }
#endif
      if (depth>0) {
	int way=nodeInfo[useDepth+1]->way();
	int sequence = nodeInfo[useDepth+1]->sequence();
#ifndef NDEBUG
	double branchingValue = nodeInfo[useDepth+1]->branchingValue();
	if (way>0)
	  assert (columnLower_[sequence]==ceil(branchingValue));
	else
	  assert (columnUpper_[sequence]==floor(branchingValue));
#endif
	sequence = back[sequence];
	double change = bestObjective-nodeInfo[useDepth+1]->objectiveValue();
	if (change>1.0e10)
	  change= 10.0*sumChanges/(1.0+numberChanges);
	info->update(way,sequence,change,false);
      }
    } else if (problemStatus_!=0) {
      abort();
    } else {
      // Create node
      ClpNode * node;
      computeDuals(NULL);
      if (depth>0) {
	int way=nodeInfo[useDepth+1]->way();
	int sequence = nodeInfo[useDepth+1]->sequence();
#ifndef NDEBUG
	double branchingValue = nodeInfo[useDepth+1]->branchingValue();
	if (way>0)
	  assert (columnLower_[sequence]==ceil(branchingValue));
	else
	  assert (columnUpper_[sequence]==floor(branchingValue));
#endif
	sequence = back[sequence];
	info->update(way,sequence,
		     objectiveValue()-nodeInfo[useDepth+1]->objectiveValue(),
		     true);
	numberChanges++;
	sumChanges += objectiveValue()-nodeInfo[useDepth+1]->objectiveValue();
      }
#ifdef CHECK_PATH
      if (startOptimal&&numberColumns_==numberColumns_Z) {
	bool onOptimal=true;
	for (int i=0;i<numberColumns_;i++) {
	  if (columnUpper_[i]<debuggerSolution_Z[i]||columnLower_[i]>debuggerSolution_Z[i]) {
	    onOptimal=false;
	    break;
	  }
	}
	if (onOptimal) {
	  if (depth>=info->nDepth_) {
	    printf("on optimal fathom at full depth %d %d %g\n",
		   depth,goodNodes,objectiveValue());
	    gotGoodNode_Z=goodNodes;
	    startOptimal=2;
	  } else {
	    printf("on optimal fathom at depth %d\n",depth);
	  }
	}
      } else if (info->large_&&startOptimal&&info->large_->numberColumns_==numberColumns_Z) {
	bool onOptimal=true;
	// Fix bounds in large
	for (int i=0;i<numberColumns_;i++) {
	  if (integerType_[i]) {
	    int iColumn = info->whichColumn_[i];
	    info->large_->columnUpper_[iColumn] = columnUpper_[i];
	    info->large_->columnLower_[iColumn] = columnLower_[i];
	    printf("%d dj %g dual %g scale %g\n",
		   iColumn,dj_[i],reducedCost_[i],columnScale_[i]);
		   
	  }
	}
	for (int i=0;i<info->large_->numberColumns_;i++) {
	  if (info->large_->columnUpper_[i]<debuggerSolution_Z[i]||info->large_->columnLower_[i]>debuggerSolution_Z[i]) {
	    onOptimal=false;
	    break;
	  }
	}
	if (onOptimal) {
	  if (depth>=info->nDepth_) {
	    printf("on (pre) tentative optimal fathom at full depth %d %d %g\n",
		   depth,goodNodes,objectiveValue());
	    for (int i=0;i<info->large_->numberColumns_;i++) 
	      printf("fathomA %d %g %g\n",i,info->large_->columnLower_[i],
		     info->large_->columnUpper_[i]);
	  } else {
	    printf("on (pre) optimal fathom at depth %d\n",depth);
	  }
	}
      }
#endif
      if (depth<info->nDepth_&&!stopAtOnce) {
	node = nodeInfo[useDepth];
	if (node) {
	  node->gutsOfConstructor(this,info,1,depth);
	} else {
	  node = new ClpNode(this,info,depth);
	  nodeInfo[useDepth]=node;
	}
      } else {
	// save
	node = nodeInfo[goodNodes];
	if (!node) {
	  node = new ClpNode(this,info,depth);
	  nodeInfo[goodNodes]=node;
	}
	if (!node->oddArraysExist())
	  node->createArrays(this);
	node->gutsOfConstructor(this,info,2,depth);
      }
      if (node->sequence()<0) {
	// solution
	lastFeasible=false;
	double objectiveValue=doubleCheck();
	if (printing)
	  printf("Solution of %g after %d nodes at depth %d\n",
		 objectiveValue,numberNodes,depth);
	if (objectiveValue<bestObjective&&!problemStatus_) {
	  // make sure node exists
	  node = nodeInfo[goodNodes];
	  if (!node) {
	    node = new ClpNode(this,info,depth);
	    nodeInfo[goodNodes]=node;
	  }
	  if (info->large_) {
	    //check this does everything
	    // Fix bounds in large
	    for (int i=0;i<numberColumns_;i++) {
	      if (integerType_[i]) {
		int iColumn = info->whichColumn_[i];
		info->large_->columnUpper_[iColumn] = columnUpper_[i];
		info->large_->columnLower_[iColumn] = columnLower_[i];
	      }
	    }
	    static_cast<ClpSimplexOther *> (info->large_)->afterCrunch(*this,
		       info->whichRow_,info->whichColumn_,info->nBound_);
	    // do as for large
	    if (!node->oddArraysExist())
	      node->createArrays(info->large_);
	    node->gutsOfConstructor(info->large_,info,2,depth);
	  } else {
	    if (!node->oddArraysExist())
	      node->createArrays(this);
	    node->gutsOfConstructor(this,info,2,depth);
	  }
	  whichSolution=goodNodes;
	  goodNodes++;
	  if (goodNodes>=nNodes)
	    justDive=true; // clean up phase
	  assert (node->sequence()<0);
	  bestObjective = objectiveValue-increment;
	  setDblParam(ClpDualObjectiveLimit,bestObjective*optimizationDirection_);
	} else {
#ifdef CLP_INVESTIGATE
	  printf("why bad solution feasible\n");
	  abort();
#endif
	}
	backtrack=true;
      } else {
	lastFeasible=true;
	//if (printing)
	//printf("depth %d variable %d\n",depth,node->sequence());
	if (depth==info->nDepth_||stopAtOnce) {
	  if (info->large_) {
	    //check this does everything
	    // Fix bounds in large
	    for (int i=0;i<numberColumns_;i++) {
	      if (integerType_[i]) {
		int iColumn = info->whichColumn_[i];
		info->large_->columnUpper_[iColumn] = columnUpper_[i];
		info->large_->columnLower_[iColumn] = columnLower_[i];
	      }
	    }
#ifdef CHECK_PATH
	    if (startOptimal)
	      for (int i=0;i<info->large_->numberColumns_;i++) 
		printf("fathomB %d %g %g %g\n",i,info->large_->columnLower_[i],
		       info->large_->columnUpper_[i],
		       node->dualSolution()[i]);
#endif
	    static_cast<ClpSimplexOther *> (info->large_)->afterCrunch(*this,
		       info->whichRow_,info->whichColumn_,info->nBound_);
#ifdef CHECK_PATH
	    if (startOptimal) {
	      bool onOptimal=true;
	      for (int i=0;i<info->large_->numberColumns_;i++) 
		printf("fathomC %d %g %g\n",i,info->large_->columnLower_[i],
		       info->large_->columnUpper_[i]);
	      for (int i=0;i<info->large_->numberColumns_;i++) {
		if (info->large_->columnUpper_[i]<debuggerSolution_Z[i]||info->large_->columnLower_[i]>debuggerSolution_Z[i]) {
		  onOptimal=false;
		  break;
		}
	      }
	      if (onOptimal) {
		printf("on (pre) optimal fathom at full depth %d %d %g\n",
		       depth,goodNodes,info->large_->objectiveValue());
		startOptimal=2;
		gotGoodNode_Z=goodNodes;
		for (int i=0;i<info->large_->numberColumns_;i++) 
		  printf("fathom %d %g %g\n",i,info->large_->columnLower_[i],
			 info->large_->columnUpper_[i]);
	      }
	    }
#endif
	    // do as for large
	    node->gutsOfConstructor(info->large_,info,2,depth);
	  }
	  goodNodes++;
	  if (goodNodes>=nNodes)
	    justDive=true; // clean up phase
	  backtrack=true;
	} else {
	  depth++;
	  useDepth--;
	  backtrack=false;
	}
      }
    }
  }
  //printf("nNodes %d nDepth %d, useDepth %d goodNodes %d\n",
  // nNodes,info->nDepth_,useDepth,goodNodes);
#ifdef CHECK_PATH
  if (startOptimal) {
    assert(startOptimal==2);
    printf("got fathomed optimal at end %d\n",startOptimal);
    if (startOptimal!=2)
      abort();
  }
#endif
  assert (depth==-1);
  delete [] saveLower;
  delete [] saveUpper;
  delete [] saveLowerInternal;
  delete [] saveUpperInternal;
  delete [] back;
  //printf("fathom finished after %d nodes\n",numberNodes);
  if (whichSolution>=0) {
    setDblParam(ClpDualObjectiveLimit, saveBestObjective);
  }
  stopFastDual2(info);
  info->nNodes_ = goodNodes;
  info->numberNodesExplored_ = numberNodes;
  info->numberIterations_ = numberIterations;
  return whichSolution;
}
// Double checks OK
double 
ClpSimplex::doubleCheck()
{
#if 0
  double * solution = CoinCopyOfArray(solution_,numberColumns_+numberRows_);
  gutsOfSolution ( NULL,NULL);
  for (int i=0;i<numberColumns_;i++) {
    if (fabs(solution[i]-solution_[i])>1.0e-7)
      printf("bada %d bad %g good %g\n",
	     i,solution[i],solution_[i]);
  }
  //abort();
#endif
  dual(0,7);
#if 0
  for (int i=0;i<numberColumns_;i++) {
    if (fabs(solution[i]-solution_[i])>1.0e-7)
      printf("badb %d bad %g good %g\n",
	     i,solution[i],solution_[i]);
  }
  dual(0,1);
  for (int i=0;i<numberColumns_;i++) {
    if (fabs(solution[i]-solution_[i])>1.0e-7)
      printf("badc %d bad %g good %g\n",
	     i,solution[i],solution_[i]);
  }
  delete [] solution;
#endif
  return objectiveValue()*optimizationDirection_;
}
// Start Fast dual
int 
ClpSimplex::startFastDual2(ClpNodeStuff * info)
{
  info->saveOptions_ = specialOptions_;
  assert ((info->solverOptions_&65536)==0);
  info->solverOptions_ |= 65536;
  if ((specialOptions_&65536)==0) {
    factorization_->setPersistenceFlag(2);
  } else {
    factorization_->setPersistenceFlag(2);
    startPermanentArrays();
  }
  //assert (!lower_);
  // create modifiable copies of model rim and do optional scaling
  createRim(7+8+16+32,true,0);
#ifndef NDEBUG
  ClpPackedMatrix* clpMatrix =
    dynamic_cast< ClpPackedMatrix*>(matrix_);
  assert (clpMatrix&&(clpMatrix->flags()&1)==0);
#endif
  // mark all as current
  whatsChanged_ = 0x3ffffff;

  // change newLower and newUpper if scaled

  // Do initial factorization
  // and set certain stuff
  // We can either set increasing rows so ...IsBasic gives pivot row
  // or we can just increment iBasic one by one
  // for now let ...iBasic give pivot row
  int factorizationStatus = internalFactorize(0);
  if (factorizationStatus<0||
      (factorizationStatus&&factorizationStatus<=numberRows_)) {
    // some error
#if 0
    // we should either debug or ignore 
#ifdef CLP_INVESTIGATE
    //#ifndef NDEBUG
    printf("***** ClpDual strong branching factorization error - debug\n");
    abort();
    //#endif
#endif
    return -2;
#else
    dual(0,7);
    createRim(7+8+16+32,true,0);
    int factorizationStatus = internalFactorize(0);
    assert (factorizationStatus==0);
    if (factorizationStatus)
      abort();
#endif
  }
  // Start of fast iterations
  factorization_->sparseThreshold(0);
  factorization_->goSparse();
  assert (!info->saveCosts_);
  int numberTotal = numberRows_+numberColumns_;
  double * save = new double [3*numberTotal];
  info->saveCosts_ = save;
  CoinMemcpyN(cost_,numberTotal,save);
  return 0;
}
// Like Fast dual
int 
ClpSimplex::fastDual2(ClpNodeStuff * info)
{
  assert ((info->solverOptions_&65536)!=0);
  int numberTotal = numberRows_+numberColumns_;
  assert (info->saveCosts_);
  double * save = info->saveCosts_;
  CoinMemcpyN(save,numberTotal,cost_);
  save += numberTotal;
  CoinMemcpyN(lower_,numberTotal,save);
  save += numberTotal;
  CoinMemcpyN(upper_,numberTotal,save);
  double dummyChange;
  (static_cast<ClpSimplexDual *>(this))->changeBounds(3,NULL,dummyChange);
  numberPrimalInfeasibilities_=1;
  sumPrimalInfeasibilities_=0.5;
  sumOfRelaxedDualInfeasibilities_ = 0.0;
  sumOfRelaxedPrimalInfeasibilities_ = 0.5;
  checkDualSolution();
  //if (xxxxxx)
  //checkPrimalSolution(rowActivityWork_,columnActivityWork_);
  assert((specialOptions_&16384)==0);
  specialOptions_ |= 524288; // say use solution
  ClpObjective * saveObjective = objective_;
#ifndef NDEBUG
  //(static_cast<ClpSimplexDual *>(this))->resetFakeBounds(-1);
#endif
  //int saveNumberFake = numberFake_;
  int status = static_cast<ClpSimplexDual *> (this)->fastDual(true);
  //numberFake_ = saveNumberFake;
  specialOptions_ &= ~524288; // say dont use solution
  CoinAssert (problemStatus_||objectiveValue_<1.0e50);
  if (status&&problemStatus_!=3) {
    // not finished - might be optimal
    checkPrimalSolution(rowActivityWork_,columnActivityWork_);
    double limit = 0.0;
    getDblParam(ClpDualObjectiveLimit, limit);
    if (!numberPrimalInfeasibilities_&&objectiveValue()*optimizationDirection_<limit) { 
      problemStatus_=0;
    }
  }
  if (problemStatus_==10) {
    // Say second call
    moreSpecialOptions_ |= 256;
    //printf("Cleaning up with primal\n");
    //lastAlgorithm=1;
    int savePerturbation = perturbation_;
    int saveLog = handler_->logLevel();
    //handler_->setLogLevel(63);
    perturbation_=100;
    bool denseFactorization = initialDenseFactorization();
    // It will be safe to allow dense
    setInitialDenseFactorization(true);
    // Allow for catastrophe
    int saveMax = intParam_[ClpMaxNumIteration];
    if (intParam_[ClpMaxNumIteration]>100000+numberIterations_)
      intParam_[ClpMaxNumIteration] = numberIterations_ + 1000 + 2*numberRows_+numberColumns_;
    // check which algorithms allowed
    baseIteration_=numberIterations_;
    status = static_cast<ClpSimplexPrimal *> (this)->primal(1,7);
    baseIteration_=0;
    if (saveObjective != objective_) {
      // We changed objective to see if infeasible
      delete objective_;
      objective_=saveObjective;
      if (!problemStatus_) {
	// carry on
	status = static_cast<ClpSimplexPrimal *> (this)->primal(1,7);
      }
    }
    if (problemStatus_==3&&numberIterations_<saveMax) {
#ifdef COIN_DEVELOP
      if (handler_->logLevel()>0)
	printf("looks like trouble - too many iterations in clean up - trying again\n");
#endif
      // flatten solution and try again
      int iColumn;
      for (iColumn=0;iColumn<numberTotal;iColumn++) {
	if (getStatus(iColumn)!=basic) {
	  setStatus(iColumn,superBasic);
	  // but put to bound if close
	  if (fabs(solution_[iColumn]-lower_[iColumn])
	      <=primalTolerance_) {
	    solution_[iColumn]=lower_[iColumn];
	    setStatus(iColumn,atLowerBound);
	  } else if (fabs(solution_[iColumn]
			  -upper_[iColumn])
		     <=primalTolerance_) {
	    solution_[iColumn]=upper_[iColumn];
	    setStatus(iColumn,atUpperBound);
	  }
	}
      }
      problemStatus_=-1;
      intParam_[ClpMaxNumIteration] = CoinMin(numberIterations_ + 1000 + 
					      2*numberRows_+numberColumns_,saveMax);
      perturbation_=savePerturbation;
      baseIteration_=numberIterations_;
      status = static_cast<ClpSimplexPrimal *> (this)->primal(0);
      baseIteration_=0;
      computeObjectiveValue();
      // can't rely on djs either
      memset(reducedCost_,0,numberColumns_*sizeof(double));
#ifdef COIN_DEVELOP
      if (problemStatus_==3&&numberIterations_<saveMax&&handler_->logLevel()>0)
	printf("looks like real trouble - too many iterations in second clean up - giving up\n");
#endif
    }
    // Say not second call
    moreSpecialOptions_ &= ~256;
    intParam_[ClpMaxNumIteration] = saveMax;
    
    setInitialDenseFactorization(denseFactorization);
    perturbation_=savePerturbation;
    if (problemStatus_==10) { 
      if (!numberPrimalInfeasibilities_)
	problemStatus_=0;
      else
	problemStatus_=4;
    }
    handler_->setLogLevel(saveLog);
  }
  status=problemStatus_;
  if (!problemStatus_) {
    int j;
    // Move solution to external array
    if (!columnScale_) {
      CoinMemcpyN(solution_,numberColumns_,columnActivity_);
    } else {
      for (j=0;j<numberColumns_;j++) 
	columnActivity_[j] = solution_[j]*columnScale_[j];
    }
    if ((info->solverOptions_&1)!=0) {
      // reduced costs
      if (!columnScale_) {
	CoinMemcpyN(dj_,numberColumns_,reducedCost_);
      } else {
	for (j=0;j<numberColumns_;j++) 
	  reducedCost_[j] = dj_[j]*columnScale_[j+numberColumns_];
      }
    }
    if ((info->solverOptions_&2)!=0) {
      // dual
      if (!rowScale_) {
	//CoinMemcpyN(dual_,numberRows_,dj_+numberColumns_);
      } else {
	for (j=0;j<numberRows_;j++) 
	  dual_[j] = dj_[j+numberColumns_]*rowScale_[j];
      }
    }
    if ((info->solverOptions_&4)!=0) {
      // row activity
      if (!rowScale_) {
	CoinMemcpyN(solution_+numberColumns_,numberRows_,rowActivity_);
      } else {
	for (j=0;j<numberRows_;j++) 
	  rowActivity_[j] = solution_[j+numberColumns_]*rowScale_[j+numberRows_];
      }
    }
  }
  save = info->saveCosts_;
  CoinMemcpyN(save,numberTotal,cost_);
#if 0
  save += numberTotal;
  CoinMemcpyN(save,numberTotal,lower_);
  save += numberTotal;
  CoinMemcpyN(save,numberTotal,upper_);
#endif
  return status;
}
// Stop Fast dual
void 
ClpSimplex::stopFastDual2(ClpNodeStuff * info)
{
  delete [] info->saveCosts_;
  info->saveCosts_=NULL;
  specialOptions_=info->saveOptions_;
  // try just factorization
  if ((specialOptions_&65536)==0)
    factorization_->setPersistenceFlag(0);
  deleteRim(1);
  whatsChanged_ &= ~0xffff;
  assert ((info->solverOptions_&65536)!=0);
  info->solverOptions_ &= ~65536;
}
// Deals with crunch aspects
ClpSimplex *
ClpSimplex::fastCrunch(ClpNodeStuff * info, int mode)
{
  ClpSimplex * small=NULL;
  if (mode==0) {
    // before crunch
    // crunch down
    // Use dual region
    double * rhs = dual_;
    int * whichRow = new int[3*numberRows_];
    int * whichColumn = new int[2*numberColumns_];
    int nBound;
    bool tightenBounds = ((specialOptions_&64)==0) ? false : true; 
    small = 
      static_cast<ClpSimplexOther *> (this)->crunch(rhs,whichRow,whichColumn,
					 nBound,false,tightenBounds);
    if (small) {
      info->large_=this;
      info->whichRow_ = whichRow;
      info->whichColumn_ = whichColumn;
      info->nBound_ = nBound;
      if (info->upPseudo_) {
	const char * integerType2 = small->integerInformation();
	int n=small->numberColumns();
	int k=0;
	int jColumn=0;
	int j=0;
	for (int i=0;i<n;i++) {
	  if (integerType2[i]) {
	    int iColumn = whichColumn[i];
	    // find
	    while (jColumn!=iColumn) {
	      if (integerType_[jColumn])
		j++;
	      jColumn++;
	    }
	    info->upPseudo_[k]=info->upPseudo_[j];
	    info->numberUp_[k]=info->numberUp_[j];
	    info->numberUpInfeasible_[k]=info->numberUpInfeasible_[j];
	    info->downPseudo_[k]=info->downPseudo_[j];
	    info->numberDown_[k]=info->numberDown_[j];
	    info->numberDownInfeasible_[k]=info->numberDownInfeasible_[j];
	    assert (info->upPseudo_[k]>1.0e-40&&info->upPseudo_[k]<1.0e40);
	    assert (info->downPseudo_[k]>1.0e-40&&info->downPseudo_[k]<1.0e40);
	    k++;
	  }
	}
      }
    } else {
      delete [] whichRow;
      delete [] whichColumn;
    }
  } else {
    // after crunch
    if (mode==1) {
      // has solution
      ClpSimplex * other = info->large_;
      assert (other!=this);
      static_cast<ClpSimplexOther *> (other)->afterCrunch(*this,
					       info->whichRow_,
					       info->whichColumn_,info->nBound_);
      for (int i=0;i<other->numberColumns_;i++) {
	if (other->integerType_[i]) { 
	  double value = other->columnActivity_[i];
	  double value2 = floor(value+0.5);
	  assert (fabs(value-value2)<1.0e-4);
	  other->columnActivity_[i]=value2;
	  other->columnLower_[i]=value2;
	  other->columnUpper_[i]=value2;
	}
      }
    }
    delete [] info->whichRow_;
    delete [] info->whichColumn_;
  }
  return small;
}
// Resizes rim part of model 
void 
ClpSimplex::resize (int newNumberRows, int newNumberColumns)
{
  ClpModel::resize(newNumberRows,newNumberColumns);
  if (saveStatus_) {
    // delete arrays
    int saveOptions = specialOptions_;
    specialOptions_=0;
    gutsOfDelete(2);
    specialOptions_=saveOptions;
  }
}
// Return true if the objective limit test can be relied upon
bool 
ClpSimplex::isObjectiveLimitTestValid() const 
{
  if (problemStatus_ == 0) {
    return true;
  } else if (problemStatus_ == 1) {
    // ok if dual
    return (algorithm_<0); 
  } else if (problemStatus_==2) {
    // ok if primal
    return (algorithm_>0); 
  } else {
    return false;
  }
}
// Create C++ lines to get to current state
void 
ClpSimplex::generateCpp( FILE * fp, bool defaultFactor)
{
  ClpModel::generateCpp(fp);
  ClpSimplex defaultModel;
  ClpSimplex * other = &defaultModel;
  int iValue1, iValue2;
  double dValue1, dValue2;
  // Stuff that can't be done easily
  if (factorizationFrequency()==other->factorizationFrequency()) {
    if (defaultFactor) {
      fprintf(fp,"3  // For branchAndBound this may help\n");
      fprintf(fp,"3  clpModel->defaultFactorizationFrequency();\n");
    } else {
      // tell user about default
      fprintf(fp,"3  // For initialSolve you don't need below but ...\n");
      fprintf(fp,"3  // clpModel->defaultFactorizationFrequency();\n");
    }
  } 
  iValue1 = this->factorizationFrequency();
  iValue2 = other->factorizationFrequency();
  fprintf(fp,"%d  int save_factorizationFrequency = clpModel->factorizationFrequency();\n",iValue1==iValue2 ? 2 : 1);
  fprintf(fp,"%d  clpModel->setFactorizationFrequency(%d);\n",iValue1==iValue2 ? 4 : 3,iValue1);
  fprintf(fp,"%d  clpModel->setFactorizationFrequency(save_factorizationFrequency);\n",iValue1==iValue2 ? 7 : 6);
  dValue1 = this->dualBound();
  dValue2 = other->dualBound();
  fprintf(fp,"%d  double save_dualBound = clpModel->dualBound();\n",dValue1==dValue2 ? 2 : 1);
  fprintf(fp,"%d  clpModel->setDualBound(%g);\n",dValue1==dValue2 ? 4 : 3,dValue1);
  fprintf(fp,"%d  clpModel->setDualBound(save_dualBound);\n",dValue1==dValue2 ? 7 : 6);
  dValue1 = this->infeasibilityCost();
  dValue2 = other->infeasibilityCost();
  fprintf(fp,"%d  double save_infeasibilityCost = clpModel->infeasibilityCost();\n",dValue1==dValue2 ? 2 : 1);
  fprintf(fp,"%d  clpModel->setInfeasibilityCost(%g);\n",dValue1==dValue2 ? 4 : 3,dValue1);
  fprintf(fp,"%d  clpModel->setInfeasibilityCost(save_infeasibilityCost);\n",dValue1==dValue2 ? 7 : 6);
  iValue1 = this->perturbation();
  iValue2 = other->perturbation();
  fprintf(fp,"%d  int save_perturbation = clpModel->perturbation();\n",iValue1==iValue2 ? 2 : 1);
  fprintf(fp,"%d  clpModel->setPerturbation(%d);\n",iValue1==iValue2 ? 4 : 3,iValue1);
  fprintf(fp,"%d  clpModel->setPerturbation(save_perturbation);\n",iValue1==iValue2 ? 7 : 6);
}
