LP Solver Interface

Detailed Description

methods and files provided by the LP solver interface of SCIP

SCIP uses external tools to solve LP relaxations. The communication is realized through an LP interface.

This page lists public interface methods that every LP interface provides. Find the concrete implementation for your LP solver under "src/lpi/".

See also

Available implementations of the LP solver interface for a list of available LP solver interfaces

This file specifies a generic LP solver interface used by SCIP to create, modify, and solve linear programs of the form

min/max obj * x lhs <= A * x <= rhs lb <= x <= ub

and query information about the solution. Although it includes a few SCIP header files, e.g., because it uses SCIP's return codes, it can be used independently of any SCIP instance.

The basis status for (column) variables are as follows:

• If x_j = lb, then j is at its lower bound (SCIP_BASESTAT_LOWER).
• If x_j = ub, then j is at its lower bound (SCIP_BASESTAT_UPPER).
• If x_j is in the basis, it has SCIP_BASESTAT_BASIC status.
• If x_j is free and non-basic, it has SCIP_BASESTAT_ZERO status.

The basis status for (row) slack variables are:

• If (A * x)_i = lhs, then i is at its lower bound (SCIP_BASESTAT_LOWER).
• If (A * x)_i = rhs, then i is at its upper bound (SCIP_BASESTAT_UPPER).
• If the slack variable for row i is basic, it has SCIP_BASESTAT_BASIC status.

If the solvers use their status differently, those status codes have to be corrected.

In the methods accessing information about the (inverse of the) basis matrix, the interface assumes the following column-oriented format: slack variables of rows have coefficient +1 and the basis matrix is a regular m times m submatrix of (A,I), where m is the number of rows and I is the identity matrix. This means that if, internally, the LP solver uses coefficients -1 for some of the slack variables, then every row associated with a slack variable whose coefficient is -1 should be negated in order to return the result in terms of the LP interface definition.

The creation of a new LP should always be done in the following ways: Either one can use SCIPlpiLoadColLP() or one first adds empty columns or rows. Then the matrix entries can be added by adding columns and rows, respectively. Adding matrix entries for a row or column that have not been added before will result in an error.

The handling of the objective limit is as follows, if supported by the LP-solver: If the objective is larger than the objective limit for minimization problems or smaller than the objective limit for maximization problems, the solution process can be stopped. This naturally occurs in a branch-and-bound process, where the objective limit is set to the value of the best solution found so far. If the problem is a minimization problem and we use the dual simplex, the dual feasible solutions are maximized. If their value are larger than the objective limit, the process can be stopped. In this case, no feasible integer solution can be found in the corresponding branch.

Some LP-solvers also support the opposite setting, but this can easily be checked after the solution process (i.e., for a minimization problem a check whether the optimal value is smaller than the limit). Note that this check can only be determined at the end of the optimization. Thus, we do not support this.

Files
file	lpi.h
	interface methods for specific LP solvers
file	lpi_clp.cpp
	LP interface for Clp.
file	lpi_cpx.c
	LP interface for CPLEX >= 8.0.
file	lpi_glop.cpp
	LP interface for Glop.
file	lpi_grb.c
	LP interface for Gurobi.
file	lpi_msk.c
	LP interface for MOSEK.
file	lpi_none.c
	dummy interface for the case no LP solver is needed
file	lpi_spx1.cpp
	LP interface for SoPlex version 1.4 and higher.
file	lpi_spx2.cpp
	LP interface for SoPlex version 2.0 and higher.
file	lpi_xprs.c
	LP interface for Xpress-MP.

Miscellaneous Methods
SCIP_EXPORT const char *	SCIPlpiGetSolverName (void)
SCIP_EXPORT const char *	SCIPlpiGetSolverDesc (void)
SCIP_EXPORT void *	SCIPlpiGetSolverPointer (SCIP_LPI *lpi)
SCIP_EXPORT SCIP_RETCODE	SCIPlpiSetIntegralityInformation (SCIP_LPI *lpi, int ncols, int *intInfo)
SCIP_EXPORT SCIP_Bool	SCIPlpiHasPrimalSolve (void)
SCIP_EXPORT SCIP_Bool	SCIPlpiHasDualSolve (void)
SCIP_EXPORT SCIP_Bool	SCIPlpiHasBarrierSolve (void)

LPI Creation and Destruction Methods
SCIP_EXPORT SCIP_RETCODE	SCIPlpiCreate (SCIP_LPI **lpi, SCIP_MESSAGEHDLR *messagehdlr, const char *name, SCIP_OBJSEN objsen)
SCIP_EXPORT SCIP_RETCODE	SCIPlpiFree (SCIP_LPI **lpi)

Modification Methods
SCIP_EXPORT SCIP_RETCODE	SCIPlpiLoadColLP (SCIP_LPI *lpi, SCIP_OBJSEN objsen, int ncols, const SCIP_Real *obj, const SCIP_Real *lb, const SCIP_Real *ub, char **colnames, int nrows, const SCIP_Real *lhs, const SCIP_Real *rhs, char **rownames, int nnonz, const int *beg, const int *ind, const SCIP_Real *val)
SCIP_EXPORT SCIP_RETCODE	SCIPlpiAddCols (SCIP_LPI *lpi, int ncols, const SCIP_Real *obj, const SCIP_Real *lb, const SCIP_Real *ub, char **colnames, int nnonz, const int *beg, const int *ind, const SCIP_Real *val)
SCIP_EXPORT SCIP_RETCODE	SCIPlpiDelCols (SCIP_LPI *lpi, int firstcol, int lastcol)
SCIP_EXPORT SCIP_RETCODE	SCIPlpiDelColset (SCIP_LPI *lpi, int *dstat)
SCIP_EXPORT SCIP_RETCODE	SCIPlpiAddRows (SCIP_LPI *lpi, int nrows, const SCIP_Real *lhs, const SCIP_Real *rhs, char **rownames, int nnonz, const int *beg, const int *ind, const SCIP_Real *val)
SCIP_EXPORT SCIP_RETCODE	SCIPlpiDelRows (SCIP_LPI *lpi, int firstrow, int lastrow)
SCIP_EXPORT SCIP_RETCODE	SCIPlpiDelRowset (SCIP_LPI *lpi, int *dstat)
SCIP_EXPORT SCIP_RETCODE	SCIPlpiClear (SCIP_LPI *lpi)
SCIP_EXPORT SCIP_RETCODE	SCIPlpiChgBounds (SCIP_LPI *lpi, int ncols, const int *ind, const SCIP_Real *lb, const SCIP_Real *ub)
SCIP_EXPORT SCIP_RETCODE	SCIPlpiChgSides (SCIP_LPI *lpi, int nrows, const int *ind, const SCIP_Real *lhs, const SCIP_Real *rhs)
SCIP_EXPORT SCIP_RETCODE	SCIPlpiChgCoef (SCIP_LPI *lpi, int row, int col, SCIP_Real newval)
SCIP_EXPORT SCIP_RETCODE	SCIPlpiChgObjsen (SCIP_LPI *lpi, SCIP_OBJSEN objsen)
SCIP_EXPORT SCIP_RETCODE	SCIPlpiChgObj (SCIP_LPI *lpi, int ncols, const int *ind, const SCIP_Real *obj)
SCIP_EXPORT SCIP_RETCODE	SCIPlpiScaleRow (SCIP_LPI *lpi, int row, SCIP_Real scaleval)
SCIP_EXPORT SCIP_RETCODE	SCIPlpiScaleCol (SCIP_LPI *lpi, int col, SCIP_Real scaleval)

Data Accessing Methods
SCIP_EXPORT SCIP_RETCODE	SCIPlpiGetNRows (SCIP_LPI *lpi, int *nrows)
SCIP_EXPORT SCIP_RETCODE	SCIPlpiGetNCols (SCIP_LPI *lpi, int *ncols)
SCIP_EXPORT SCIP_RETCODE	SCIPlpiGetObjsen (SCIP_LPI *lpi, SCIP_OBJSEN *objsen)
SCIP_EXPORT SCIP_RETCODE	SCIPlpiGetNNonz (SCIP_LPI *lpi, int *nnonz)
SCIP_EXPORT SCIP_RETCODE	SCIPlpiGetCols (SCIP_LPI *lpi, int firstcol, int lastcol, SCIP_Real *lb, SCIP_Real *ub, int *nnonz, int *beg, int *ind, SCIP_Real *val)
SCIP_EXPORT SCIP_RETCODE	SCIPlpiGetRows (SCIP_LPI *lpi, int firstrow, int lastrow, SCIP_Real *lhs, SCIP_Real *rhs, int *nnonz, int *beg, int *ind, SCIP_Real *val)
SCIP_EXPORT SCIP_RETCODE	SCIPlpiGetColNames (SCIP_LPI *lpi, int firstcol, int lastcol, char **colnames, char *namestorage, int namestoragesize, int *storageleft)
SCIP_EXPORT SCIP_RETCODE	SCIPlpiGetRowNames (SCIP_LPI *lpi, int firstrow, int lastrow, char **rownames, char *namestorage, int namestoragesize, int *storageleft)
SCIP_EXPORT SCIP_RETCODE	SCIPlpiGetObj (SCIP_LPI *lpi, int firstcol, int lastcol, SCIP_Real *vals)
SCIP_EXPORT SCIP_RETCODE	SCIPlpiGetBounds (SCIP_LPI *lpi, int firstcol, int lastcol, SCIP_Real *lbs, SCIP_Real *ubs)
SCIP_EXPORT SCIP_RETCODE	SCIPlpiGetSides (SCIP_LPI *lpi, int firstrow, int lastrow, SCIP_Real *lhss, SCIP_Real *rhss)
SCIP_EXPORT SCIP_RETCODE	SCIPlpiGetCoef (SCIP_LPI *lpi, int row, int col, SCIP_Real *val)

Solving Methods
SCIP_EXPORT SCIP_RETCODE	SCIPlpiSolvePrimal (SCIP_LPI *lpi)
SCIP_EXPORT SCIP_RETCODE	SCIPlpiSolveDual (SCIP_LPI *lpi)
SCIP_EXPORT SCIP_RETCODE	SCIPlpiSolveBarrier (SCIP_LPI *lpi, SCIP_Bool crossover)
SCIP_EXPORT SCIP_RETCODE	SCIPlpiStartStrongbranch (SCIP_LPI *lpi)
SCIP_EXPORT SCIP_RETCODE	SCIPlpiEndStrongbranch (SCIP_LPI *lpi)
SCIP_EXPORT SCIP_RETCODE	SCIPlpiStrongbranchFrac (SCIP_LPI *lpi, int col, SCIP_Real psol, int itlim, SCIP_Real *down, SCIP_Real *up, SCIP_Bool *downvalid, SCIP_Bool *upvalid, int *iter)
SCIP_EXPORT SCIP_RETCODE	SCIPlpiStrongbranchesFrac (SCIP_LPI *lpi, int *cols, int ncols, SCIP_Real *psols, int itlim, SCIP_Real *down, SCIP_Real *up, SCIP_Bool *downvalid, SCIP_Bool *upvalid, int *iter)
SCIP_EXPORT SCIP_RETCODE	SCIPlpiStrongbranchInt (SCIP_LPI *lpi, int col, SCIP_Real psol, int itlim, SCIP_Real *down, SCIP_Real *up, SCIP_Bool *downvalid, SCIP_Bool *upvalid, int *iter)
SCIP_EXPORT SCIP_RETCODE	SCIPlpiStrongbranchesInt (SCIP_LPI *lpi, int *cols, int ncols, SCIP_Real *psols, int itlim, SCIP_Real *down, SCIP_Real *up, SCIP_Bool *downvalid, SCIP_Bool *upvalid, int *iter)

Solution Information Methods
SCIP_EXPORT SCIP_Bool	SCIPlpiWasSolved (SCIP_LPI *lpi)
SCIP_EXPORT SCIP_RETCODE	SCIPlpiGetSolFeasibility (SCIP_LPI *lpi, SCIP_Bool *primalfeasible, SCIP_Bool *dualfeasible)
SCIP_EXPORT SCIP_Bool	SCIPlpiExistsPrimalRay (SCIP_LPI *lpi)
SCIP_EXPORT SCIP_Bool	SCIPlpiHasPrimalRay (SCIP_LPI *lpi)
SCIP_EXPORT SCIP_Bool	SCIPlpiIsPrimalUnbounded (SCIP_LPI *lpi)
SCIP_EXPORT SCIP_Bool	SCIPlpiIsPrimalInfeasible (SCIP_LPI *lpi)
SCIP_EXPORT SCIP_Bool	SCIPlpiIsPrimalFeasible (SCIP_LPI *lpi)
SCIP_EXPORT SCIP_Bool	SCIPlpiExistsDualRay (SCIP_LPI *lpi)
SCIP_EXPORT SCIP_Bool	SCIPlpiHasDualRay (SCIP_LPI *lpi)
SCIP_EXPORT SCIP_Bool	SCIPlpiIsDualUnbounded (SCIP_LPI *lpi)
SCIP_EXPORT SCIP_Bool	SCIPlpiIsDualInfeasible (SCIP_LPI *lpi)
SCIP_EXPORT SCIP_Bool	SCIPlpiIsDualFeasible (SCIP_LPI *lpi)
SCIP_EXPORT SCIP_Bool	SCIPlpiIsOptimal (SCIP_LPI *lpi)
SCIP_EXPORT SCIP_Bool	SCIPlpiIsStable (SCIP_LPI *lpi)
SCIP_EXPORT SCIP_Bool	SCIPlpiIsObjlimExc (SCIP_LPI *lpi)
SCIP_EXPORT SCIP_Bool	SCIPlpiIsIterlimExc (SCIP_LPI *lpi)
SCIP_EXPORT SCIP_Bool	SCIPlpiIsTimelimExc (SCIP_LPI *lpi)
SCIP_EXPORT int	SCIPlpiGetInternalStatus (SCIP_LPI *lpi)
SCIP_EXPORT SCIP_RETCODE	SCIPlpiIgnoreInstability (SCIP_LPI *lpi, SCIP_Bool *success)
SCIP_EXPORT SCIP_RETCODE	SCIPlpiGetObjval (SCIP_LPI *lpi, SCIP_Real *objval)
SCIP_EXPORT SCIP_RETCODE	SCIPlpiGetSol (SCIP_LPI *lpi, SCIP_Real *objval, SCIP_Real *primsol, SCIP_Real *dualsol, SCIP_Real *activity, SCIP_Real *redcost)
SCIP_EXPORT SCIP_RETCODE	SCIPlpiGetPrimalRay (SCIP_LPI *lpi, SCIP_Real *ray)
SCIP_EXPORT SCIP_RETCODE	SCIPlpiGetDualfarkas (SCIP_LPI *lpi, SCIP_Real *dualfarkas)
SCIP_EXPORT SCIP_RETCODE	SCIPlpiGetIterations (SCIP_LPI *lpi, int *iterations)
SCIP_EXPORT SCIP_RETCODE	SCIPlpiGetRealSolQuality (SCIP_LPI *lpi, SCIP_LPSOLQUALITY qualityindicator, SCIP_Real *quality)

LP Basis Methods
SCIP_EXPORT SCIP_RETCODE	SCIPlpiGetBase (SCIP_LPI *lpi, int *cstat, int *rstat)
SCIP_EXPORT SCIP_RETCODE	SCIPlpiSetBase (SCIP_LPI *lpi, const int *cstat, const int *rstat)
SCIP_EXPORT SCIP_RETCODE	SCIPlpiGetBasisInd (SCIP_LPI *lpi, int *bind)
SCIP_EXPORT SCIP_RETCODE	SCIPlpiGetBInvRow (SCIP_LPI *lpi, int r, SCIP_Real *coef, int *inds, int *ninds)
SCIP_EXPORT SCIP_RETCODE	SCIPlpiGetBInvCol (SCIP_LPI *lpi, int c, SCIP_Real *coef, int *inds, int *ninds)
SCIP_EXPORT SCIP_RETCODE	SCIPlpiGetBInvARow (SCIP_LPI *lpi, int r, const SCIP_Real *binvrow, SCIP_Real *coef, int *inds, int *ninds)
SCIP_EXPORT SCIP_RETCODE	SCIPlpiGetBInvACol (SCIP_LPI *lpi, int c, SCIP_Real *coef, int *inds, int *ninds)

LPi State Methods
SCIP_EXPORT SCIP_RETCODE	SCIPlpiGetState (SCIP_LPI *lpi, BMS_BLKMEM *blkmem, SCIP_LPISTATE **lpistate)
SCIP_EXPORT SCIP_RETCODE	SCIPlpiSetState (SCIP_LPI *lpi, BMS_BLKMEM *blkmem, const SCIP_LPISTATE *lpistate)
SCIP_EXPORT SCIP_RETCODE	SCIPlpiClearState (SCIP_LPI *lpi)
SCIP_EXPORT SCIP_RETCODE	SCIPlpiFreeState (SCIP_LPI *lpi, BMS_BLKMEM *blkmem, SCIP_LPISTATE **lpistate)
SCIP_EXPORT SCIP_Bool	SCIPlpiHasStateBasis (SCIP_LPI *lpi, SCIP_LPISTATE *lpistate)
SCIP_EXPORT SCIP_RETCODE	SCIPlpiReadState (SCIP_LPI *lpi, const char *fname)
SCIP_EXPORT SCIP_RETCODE	SCIPlpiWriteState (SCIP_LPI *lpi, const char *fname)

LPi Pricing Norms Methods
SCIP_RETCODE	SCIPlpiGetNorms (SCIP_LPI *lpi, BMS_BLKMEM *blkmem, SCIP_LPINORMS **lpinorms)
SCIP_RETCODE	SCIPlpiSetNorms (SCIP_LPI *lpi, BMS_BLKMEM *blkmem, const SCIP_LPINORMS *lpinorms)
SCIP_RETCODE	SCIPlpiFreeNorms (SCIP_LPI *lpi, BMS_BLKMEM *blkmem, SCIP_LPINORMS **lpinorms)

Parameter Methods
SCIP_EXPORT SCIP_RETCODE	SCIPlpiGetIntpar (SCIP_LPI *lpi, SCIP_LPPARAM type, int *ival)
SCIP_EXPORT SCIP_RETCODE	SCIPlpiSetIntpar (SCIP_LPI *lpi, SCIP_LPPARAM type, int ival)
SCIP_EXPORT SCIP_RETCODE	SCIPlpiGetRealpar (SCIP_LPI *lpi, SCIP_LPPARAM type, SCIP_Real *dval)
SCIP_EXPORT SCIP_RETCODE	SCIPlpiSetRealpar (SCIP_LPI *lpi, SCIP_LPPARAM type, SCIP_Real dval)

Numerical Methods
SCIP_EXPORT SCIP_Real	SCIPlpiInfinity (SCIP_LPI *lpi)
SCIP_EXPORT SCIP_Bool	SCIPlpiIsInfinity (SCIP_LPI *lpi, SCIP_Real val)

File Interface Methods
SCIP_EXPORT SCIP_RETCODE	SCIPlpiReadLP (SCIP_LPI *lpi, const char *fname)
SCIP_EXPORT SCIP_RETCODE	SCIPlpiWriteLP (SCIP_LPI *lpi, const char *fname)

Solving Methods
static SCIP_RETCODE	lpiStrongbranch (SCIP_LPI *lpi, int col, SCIP_Real psol, int itlim, SCIP_Real *down, SCIP_Real *up, SCIP_Bool *downvalid, SCIP_Bool *upvalid, int *iter)
static SCIP_RETCODE	lpiStrongbranches (SCIP_LPI *lpi, int *cols, int ncols, SCIP_Real *psols, int itlim, SCIP_Real *down, SCIP_Real *up, SCIP_Bool *downvalid, SCIP_Bool *upvalid, int *iter)

Solving Methods
static SCIP_RETCODE	lpiStrongbranchIntegral (SCIP_LPI *lpi, int col, SCIP_Real psol, int itlim, SCIP_Real *down, SCIP_Real *up, SCIP_Bool *downvalid, SCIP_Bool *upvalid, int *iter)

Modification Methods
static void	deleteRowsAndUpdateCurrentBasis (SCIP_LPI *lpi, const DenseBooleanColumn &rows_to_delete)

LPI Creation and Destruction Methods
static SCIP_RETCODE	getASlice (SCIP_LPI *lpi, SCIP_Bool iscon, int first, int last, int *nnonz, int *beg, int *ind, double *val)
static SCIP_RETCODE	getSolutionStatus (SCIP_LPI *lpi, MSKprostae *prosta, MSKsolstae *solsta)
static MSKrescodee	filterTRMrescode (SCIP_MESSAGEHDLR *messagehdlr, MSKrescodee *termcode, MSKrescodee res)
static SCIP_RETCODE	SolveWSimplex (SCIP_LPI *lpi)
static SCIP_RETCODE	SCIPlpiStrongbranch (SCIP_LPI *lpi, int col, SCIP_Real psol, int itlim, SCIP_Real *down, SCIP_Real *up, SCIP_Bool *downvalid, SCIP_Bool *upvalid, int *iter)
static SCIP_RETCODE	handle_singular (SCIP_LPI *lpi, int *basis, MSKrescodee res)
static SCIP_RETCODE	convertstat_mosek2scip (SCIP_LPI *lpi, SCIP_Bool iscon, MSKstakeye *sk, int n, int *stat)
static SCIP_RETCODE	convertstat_mosek2scip_slack (SCIP_LPI *lpi, SCIP_Bool iscon, MSKstakeye *sk, int m, int *stat)
static void	convertstat_scip2mosek (const int *stat, int n, MSKstakeye *resstat)
static void	convertstat_scip2mosek_slack (const int *stat, int n, MSKstakeye *resstat)
static SCIP_RETCODE	lpistateCreate (SCIP_LPISTATE **lpistate, BMS_BLKMEM *blkmem, int ncols, int nrows)
static void	lpistateFree (SCIP_LPISTATE **lpistate, BMS_BLKMEM *blkmem)
static SCIP_RETCODE	checkState1 (SCIP_LPI *lpi, int n, MSKstakeye *sk, SCIP_Bool isrow)
static SCIP_RETCODE	checkState (SCIP_LPI *lpi, int ncols, int nrows)
static SCIP_RETCODE	lpistatePack (SCIP_LPI *lpi, SCIP_LPISTATE *lpistate)
static void	lpistateUnpack (const SCIP_LPISTATE *lpistate, MSKstakeye *skx, MSKstakeye *skc)

Function Documentation

SCIPlpiGetSolverName()

SCIP_EXPORT const char* SCIPlpiGetSolverName

(

void

)

gets name and version of LP solver

Definition at line 445 of file lpi_clp.cpp.

References CLP_VERSION, CPX_SUBVERSION, cpxname, glopname, grbname, LPINAME, mskname, SCIP_MAXSTRLEN, SCIPdebugMessage, SCIPlpiGetSolverDesc(), SOPLEX_SUBVERSION, spxname, and xprsname.

Referenced by doScipCreate(), lpFlushChgCols(), lpFlushChgRows(), SCIPlpCreate(), SCIPlpMarkFlushed(), and SCIPprintVersion().

SCIPlpiGetSolverDesc()

SCIP_EXPORT const char* SCIPlpiGetSolverDesc

(

void

)

gets description of LP solver (developer, webpage, ...)

Definition at line 454 of file lpi_clp.cpp.

References SCIPlpiGetSolverPointer(), and spxdesc.

Referenced by doScipCreate(), and SCIPlpiGetSolverName().

SCIPlpiGetSolverPointer()

SCIP_EXPORT void* SCIPlpiGetSolverPointer

(

SCIP_LPI *

lpi

)

gets pointer for LP solver - use only with great care

The behavior of this function depends on the solver and its use is therefore only recommended if you really know what you are doing. In general, it returns a pointer to the LP solver object.

gets pointer for LP solver - use only with great care

gets pointer for LP solver - use only with great care

Here we return the pointer to the LP environment.

gets pointer for LP solver - use only with great care

Here we return the pointer to the model.

Parameters

lpi	pointer to an LP interface structure

Definition at line 462 of file lpi_clp.cpp.

References SCIP_LPi::clp, SCIP_LPi::cpxlp, SCIP_LPi::grbmodel, MosekEnv, NULL, SCIP_LPi::prob, SCIPerrorMessage, SCIPlpiSetIntegralityInformation(), SCIP_LPi::spx, SCIP_LPi::task, and SCIP_LPi::xprslp.

Referenced by SCIPlpiGetSolverDesc().

SCIPlpiSetIntegralityInformation()

SCIP_EXPORT SCIP_RETCODE SCIPlpiSetIntegralityInformation	(	SCIP_LPI *	lpi,
		int	ncols,
		int *	intInfo
	)

pass integrality information about variables to the solver

pass integrality information to LP solver

Parameters

lpi	pointer to an LP interface structure
ncols	length of integrality array
intInfo	integrality array (0: continuous, 1: integer). May be NULL iff ncols is 0.

Definition at line 471 of file lpi_clp.cpp.

References SCIP_LPi::linear_program, NULL, SCIP_Bool, SCIP_LPERROR, SCIP_OKAY, SCIPerrorMessage, SCIPlpiHasPrimalSolve(), and SCIP_LPi::spx.

Referenced by lpCopyIntegrality(), and SCIPlpiGetSolverPointer().

SCIPlpiHasPrimalSolve()

SCIP_EXPORT SCIP_Bool SCIPlpiHasPrimalSolve

(

void

)

informs about availability of a primal simplex solving method

Definition at line 485 of file lpi_clp.cpp.

References FALSE, SCIP_Bool, SCIPlpiHasDualSolve(), and TRUE.

Referenced by SCIPlpiSetIntegralityInformation().

SCIPlpiHasDualSolve()

SCIP_EXPORT SCIP_Bool SCIPlpiHasDualSolve

(

void

)

informs about availability of a dual simplex solving method

Definition at line 493 of file lpi_clp.cpp.

References FALSE, SCIP_Bool, SCIPlpiHasBarrierSolve(), and TRUE.

Referenced by SCIPlpiHasPrimalSolve().

SCIPlpiHasBarrierSolve()

SCIP_EXPORT SCIP_Bool SCIPlpiHasBarrierSolve

(

void

)

informs about availability of a barrier solving method

Definition at line 501 of file lpi_clp.cpp.

References FALSE, SCIPlpiCreate(), and TRUE.

Referenced by SCIPlpiHasDualSolve().

SCIPlpiCreate()

SCIP_EXPORT SCIP_RETCODE SCIPlpiCreate	(	SCIP_LPI **	lpi,
		SCIP_MESSAGEHDLR *	messagehdlr,
		const char *	name,
		SCIP_OBJSEN	objsen
	)

creates an LP problem object

Parameters

lpi	pointer to an LP interface structure
messagehdlr	message handler to use for printing messages, or NULL
name	problem name
objsen	objective sense

Definition at line 522 of file lpi_clp.cpp.

References BMSallocMemory, BMSallocMemoryArray, BMSallocMemoryCPP, CHECK_ZERO, checkRangeInfo(), copyParameterValues(), DEGEN_LEVEL, FALSE, getParameterValues(), grbenv, invalidateSolution(), LPI_QSOPT_ALGO_UNKNOWN, SCIP_LPi::messagehdlr, MOSEK_CALL, MosekEnv, nextlpid, NULL, numlp, printstr(), SCIP_ALLOC, SCIP_Bool, SCIP_CALL, SCIP_LPERROR, SCIP_LPPAR_PRICING, SCIP_OKAY, SCIP_PRICING_LPIDEFAULT, SCIP_Real, SCIPdebugMessage, SCIPerrorMessage, SCIPlpiChgObjsen(), SCIPlpiFree(), SCIPlpiInfinity(), SCIPlpiSetIntpar(), SCIPmessagePrintWarning(), SENSE2MOSEK, SETBACK_LIMIT, SOPLEX_TRY, SOPLEX_VERBLEVEL, and TRUE.

Referenced by addConcaveEstimatorMultivariate(), createLP(), initAlternativeLP(), polyscip::Polyscip::printResults(), SCIP_DECL_PARAMCHGD(), SCIPlpComputeRelIntPoint(), SCIPlpCreate(), SCIPlpiHasBarrierSolve(), solveClassification(), and solveMinIISC().

SCIPlpiFree()

SCIP_EXPORT SCIP_RETCODE SCIPlpiFree

(

SCIP_LPI **

lpi

)

deletes an LP problem object

Parameters

lpi	pointer to an LP interface structure

Definition at line 634 of file lpi_clp.cpp.

References BMSfreeMemory, BMSfreeMemoryArray, BMSfreeMemoryArrayNull, CHECK_ZERO, grbenv, MOSEK_CALL, MosekEnv, NULL, numlp, SCIP_OKAY, SCIPdebugMessage, and SCIPlpiLoadColLP().

Referenced by createLP(), polyscip::Polyscip::printResults(), SCIP_DECL_CONSEXITSOL(), SCIP_DECL_PARAMCHGD(), SCIPlpComputeRelIntPoint(), SCIPlpFree(), SCIPlpiCreate(), sepadataFree(), solveClassification(), and solveMinIISC().

SCIPlpiLoadColLP()

SCIP_EXPORT SCIP_RETCODE SCIPlpiLoadColLP	(	SCIP_LPI *	lpi,
		SCIP_OBJSEN	objsen,
		int	ncols,
		const SCIP_Real *	obj,
		const SCIP_Real *	lb,
		const SCIP_Real *	ub,
		char **	colnames,
		int	nrows,
		const SCIP_Real *	lhs,
		const SCIP_Real *	rhs,
		char **	rownames,
		int	nnonz,
		const int *	beg,
		const int *	ind,
		const SCIP_Real *	val
	)

copies LP data with column matrix into LP solver

Parameters

lpi	LP interface structure
objsen	objective sense
ncols	number of columns
obj	objective function values of columns
lb	lower bounds of columns
ub	upper bounds of columns
colnames	column names, or NULL
nrows	number of rows
lhs	left hand sides of rows
rhs	right hand sides of rows
rownames	row names, or NULL
nnonz	number of nonzero elements in the constraint matrix
beg	start index of each column in ind- and val-array
ind	row indices of constraint matrix entries
val	values of constraint matrix entries

Definition at line 668 of file lpi_clp.cpp.

References addRangeInfo(), SCIP_LPi::aptre, SCIP_LPi::bkc, SCIP_LPi::bkx, BMSallocMemoryArray, BMScopyMemoryArray, BMSfreeMemoryArray, CHECK_ZERO, checkRangeInfo(), SCIP_LPi::clp, convertSides(), SCIP_LPi::cpxenv, SCIP_LPi::cpxlp, cpxObjsen(), ensureAptreMem(), ensureBkcMem(), ensureBkxMem(), ensureColMem(), ensureRowMem(), ensureSidechgMem(), ensureValMem(), generateMskBoundkeys(), getEndptrs(), SCIP_LPi::grbenv, SCIP_LPi::grbmodel, SCIP_LPi::iccnt, SCIP_LPi::indarray, invalidateSolution(), SCIP_LPi::irbeg, SCIP_LPi::ircnt, SCIP_LPi::irhs, SCIP_LPi::irng, SCIP_LPi::isen, SCIP_LPi::linear_program, SCIP_LPi::lpid, SCIP_LPi::messagehdlr, MOSEK_CALL, MosekEnv, SCIP_LPi::name, SCIP_LPi::ncols, SCIP_LPi::nrows, NULL, SCIP_LPi::prob, QS_CONDRET, r, SCIP_LPi::rhsarray, SCIP_LPi::rngarray, SCIP_ALLOC, SCIP_CALL, SCIP_LPERROR, SCIP_OBJSEN_MAXIMIZE, SCIP_OBJSEN_MINIMIZE, SCIP_OKAY, SCIP_Real, SCIP_UNUSED, SCIPdebugMessage, SCIPlpiAddCols(), SCIPlpiAddRows(), SCIPlpiChgObjsen(), SCIPlpiClear(), SCIPlpiGetNCols(), SCIPlpiGetNNonz(), SCIPlpiGetNRows(), SCIPmessagePrintWarning(), SCIP_LPi::senarray, SENSE2MOSEK, SCIP_LPi::solstat, SCIP_LPi::spx, spxObjsen(), SCIP_LPi::task, x, and SCIP_LPi::xprslp.

Referenced by polyscip::Polyscip::printResults(), and SCIPlpiFree().

SCIPlpiAddCols()

SCIP_EXPORT SCIP_RETCODE SCIPlpiAddCols	(	SCIP_LPI *	lpi,
		int	ncols,
		const SCIP_Real *	obj,
		const SCIP_Real *	lb,
		const SCIP_Real *	ub,
		char **	colnames,
		int	nnonz,
		const int *	beg,
		const int *	ind,
		const SCIP_Real *	val
	)

adds columns to the LP

Note

ind array is not checked for duplicates, problems may appear if indices are added more than once

adds columns to the LP

Parameters

lpi	LP interface structure
ncols	number of columns to be added
obj	objective function values of new columns
lb	lower bounds of new columns
ub	upper bounds of new columns
colnames	column names, or NULL
nnonz	number of nonzero elements to be added to the constraint matrix
beg	start index of each column in ind- and val-array, or NULL if nnonz == 0
ind	row indices of constraint matrix entries, or NULL if nnonz == 0
val	values of constraint matrix entries, or NULL if nnonz == 0

Definition at line 749 of file lpi_clp.cpp.

References SCIP_LPi::aptre, SCIP_LPi::bkx, BMSallocMemoryArray, BMScopyMemoryArray, BMSfreeMemoryArray, CHECK_ZERO, checkRangeInfo(), SCIP_LPi::clp, SCIP_LPi::cpxenv, SCIP_LPi::cpxlp, delRangeVars(), ensureAptreMem(), ensureBkxMem(), ensureColMem(), ensureValMem(), generateMskBoundkeys(), getEndptrs(), SCIP_LPi::grbmodel, SCIP_LPi::iccnt, SCIP_LPi::indarray, invalidateSolution(), SCIP_LPi::linear_program, SCIP_LPi::lp_modified_since_last_solve, SCIP_LPi::lpid, SCIP_LPi::messagehdlr, MOSEK_CALL, MosekEnv, SCIP_LPi::ncols, SCIP_LPi::nrngrows, SCIP_LPi::nrows, NULL, SCIP_LPi::prob, QS_CONDRET, SCIP_LPi::rngvarsadded, SCIP_ALLOC, SCIP_CALL, SCIP_LPERROR, SCIP_OKAY, SCIP_Real, SCIP_UNUSED, SCIPdebugMessage, SCIPlpiDelCols(), SCIPlpiGetNRows(), SCIPmessagePrintWarning(), SCIP_LPi::solstat, SCIP_LPi::spx, SCIP_LPi::task, x, and SCIP_LPi::xprslp.

Referenced by addAltLPColumn(), computeRelIntPoint(), createAltLPColumn(), createLP(), lpFlushAddCols(), SCIP_DECL_PARAMCHGD(), SCIPlpiLoadColLP(), solveClassification(), and solveMinIISC().

SCIPlpiDelCols()

SCIP_EXPORT SCIP_RETCODE SCIPlpiDelCols	(	SCIP_LPI *	lpi,
		int	firstcol,
		int	lastcol
	)

deletes all columns in the given range from LP

Parameters

lpi	LP interface structure
firstcol	first column to be deleted
lastcol	last column to be deleted

Definition at line 828 of file lpi_clp.cpp.

References BMSallocMemoryArray, BMSfreeMemoryArray, CHECK_ZERO, checkRangeInfo(), SCIP_LPi::clp, SCIP_LPi::cpxenv, SCIP_LPi::cpxlp, debugCheckColrang(), ensureColMem(), ensureValMem(), getIndicesRange(), SCIP_LPi::grbmodel, SCIP_LPi::iccnt, SCIP_LPi::indarray, invalidateSolution(), SCIP_LPi::linear_program, SCIP_LPi::lp_modified_since_last_solve, SCIP_LPi::lpid, SCIP_LPi::messagehdlr, MOSEK_CALL, MosekEnv, SCIP_LPi::ncols, NULL, SCIP_LPi::prob, QS_CONDRET, SCIP_ALLOC, SCIP_CALL, SCIP_OKAY, SCIPdebugMessage, SCIPlpiDelColset(), SCIPlpiGetNCols(), SCIP_LPi::solstat, SOPLEX_TRY, SCIP_LPi::spx, SCIP_LPi::task, and SCIP_LPi::xprslp.

Referenced by lpFlushDelCols(), SCIPlpiAddCols(), and SCIPlpiClear().

SCIPlpiDelColset()

SCIP_EXPORT SCIP_RETCODE SCIPlpiDelColset	(	SCIP_LPI *	lpi,
		int *	dstat
	)

deletes columns from SCIP_LPI; the new position of a column must not be greater that its old position

deletes columns from SCIP_LP; the new position of a column must not be greater that its old position

deletes columns from LP; the new position of a column must not be greater that its old position

Parameters

lpi	LP interface structure
dstat	deletion status of columns input: 1 if column should be deleted, 0 if not output: new position of column, -1 if column was deleted

Definition at line 859 of file lpi_clp.cpp.

References BMSallocMemoryArray, BMSfreeMemoryArray, CHECK_ZERO, checkRangeInfo(), SCIP_LPi::clp, SCIP_LPi::cpxenv, SCIP_LPi::cpxlp, ensureValMem(), getIndicesFromDense(), SCIP_LPi::grbmodel, SCIP_LPi::indarray, invalidateSolution(), SCIP_LPi::linear_program, SCIP_LPi::lp_modified_since_last_solve, SCIP_LPi::lpid, SCIP_LPi::messagehdlr, MOSEK_CALL, MosekEnv, SCIP_LPi::ncols, NULL, SCIP_LPi::prob, QS_CONDRET, SCIP_ALLOC, SCIP_CALL, SCIP_OKAY, SCIPdebugMessage, SCIPlpiAddRows(), SCIPlpiGetNCols(), SCIP_LPi::solstat, SOPLEX_TRY, SCIP_LPi::spx, SCIP_LPi::task, and SCIP_LPi::xprslp.

Referenced by lpDelColset(), and SCIPlpiDelCols().

SCIPlpiAddRows()

SCIP_EXPORT SCIP_RETCODE SCIPlpiAddRows	(	SCIP_LPI *	lpi,
		int	nrows,
		const SCIP_Real *	lhs,
		const SCIP_Real *	rhs,
		char **	rownames,
		int	nnonz,
		const int *	beg,
		const int *	ind,
		const SCIP_Real *	val
	)

adds rows to the LP

Note

ind array is not checked for duplicates, problems may appear if indices are added more than once

adds rows to the LP

Parameters

lpi	LP interface structure
nrows	number of rows to be added
lhs	left hand sides of new rows
rhs	right hand sides of new rows
rownames	row names, or NULL
nnonz	number of nonzero elements to be added to the constraint matrix
beg	start index of each row in ind- and val-array, or NULL if nnonz == 0
ind	column indices of constraint matrix entries, or NULL if nnonz == 0
val	values of constraint matrix entries, or NULL if nnonz == 0

Definition at line 905 of file lpi_clp.cpp.

References addRangeInfo(), SCIP_LPi::aptre, SCIP_LPi::bkc, BMSallocMemoryArray, BMScopyMemoryArray, BMSfreeMemoryArray, CHECK_ZERO, checkRangeInfo(), SCIP_LPi::clp, convertSides(), SCIP_LPi::cpxenv, SCIP_LPi::cpxlp, ensureAptreMem(), ensureBkcMem(), ensureRngrowmapMem(), ensureRowMem(), ensureSidechgMem(), ensureValMem(), FALSE, generateMskBoundkeys(), getEndptrs(), SCIP_LPi::grbmodel, SCIP_LPi::indarray, invalidateSolution(), SCIP_LPi::irbeg, SCIP_LPi::ircnt, SCIP_LPi::irhs, SCIP_LPi::irng, SCIP_LPi::isen, SCIP_LPi::linear_program, SCIP_LPi::lp_modified_since_last_solve, SCIP_LPi::lpid, SCIP_LPi::messagehdlr, MOSEK_CALL, MosekEnv, SCIP_LPi::ncols, SCIP_LPi::nrngrows, SCIP_LPi::nrows, NULL, SCIP_LPi::prob, QS_CONDRET, r, SCIP_LPi::rhsarray, SCIP_LPi::rngarray, SCIP_LPi::rngfound, SCIP_LPi::rngindarray, SCIP_LPi::rngrowmap, SCIP_LPi::rngrows, SCIP_ALLOC, SCIP_CALL, SCIP_LPERROR, SCIP_LPPAR_SCALING, SCIP_OKAY, SCIP_Real, SCIP_UNUSED, SCIPdebugMessage, SCIPlpiDelRows(), SCIPlpiGetNCols(), SCIPlpiGetNRows(), SCIPlpiSetIntpar(), SCIPmessagePrintWarning(), SCIP_LPi::senarray, SCIP_LPi::solstat, SCIP_LPi::spx, SCIP_LPi::task, TRUE, x, and SCIP_LPi::xprslp.

Referenced by addAltLPColumn(), computeRelIntPoint(), createLP(), initAlternativeLP(), lpFlushAddRows(), SCIP_DECL_PARAMCHGD(), SCIPlpiDelColset(), SCIPlpiLoadColLP(), solveClassification(), and solveMinIISC().

SCIPlpiDelRows()

SCIP_EXPORT SCIP_RETCODE SCIPlpiDelRows	(	SCIP_LPI *	lpi,
		int	firstrow,
		int	lastrow
	)

deletes all rows in the given range from LP

Parameters

lpi	LP interface structure
firstrow	first row to be deleted
lastrow	last row to be deleted

Definition at line 977 of file lpi_clp.cpp.

References BMSallocMemoryArray, BMSfreeMemoryArray, CHECK_ZERO, checkRangeInfo(), clearRangeInfo(), SCIP_LPi::clp, SCIP_LPi::cpxenv, SCIP_LPi::cpxlp, debugCheckRowrang(), deleteRowsAndUpdateCurrentBasis(), delRangeVars(), ensureRowMem(), ensureValMem(), getIndicesRange(), SCIP_LPi::grbmodel, SCIP_LPi::indarray, invalidateSolution(), SCIP_LPi::ircnt, SCIP_LPi::linear_program, SCIP_LPi::lpid, SCIP_LPi::messagehdlr, MOSEK_CALL, MosekEnv, SCIP_LPi::nrngrows, SCIP_LPi::nrows, NULL, SCIP_LPi::prob, QS_CONDRET, r, SCIP_LPi::rngrowmap, SCIP_LPi::rngrows, SCIP_LPi::rngvals, SCIP_LPi::rngvarsadded, SCIP_ALLOC, SCIP_CALL, SCIP_OKAY, SCIPdebugMessage, SCIPlpiDelRowset(), SCIPlpiGetNRows(), SCIP_LPi::solstat, SOPLEX_TRY, SCIP_LPi::spx, SCIP_LPi::task, and SCIP_LPi::xprslp.

Referenced by lpFlushDelRows(), SCIPlpiAddRows(), and SCIPlpiClear().

SCIPlpiDelRowset()

SCIP_EXPORT SCIP_RETCODE SCIPlpiDelRowset	(	SCIP_LPI *	lpi,
		int *	dstat
	)

deletes rows from SCIP_LPI; the new position of a row must not be greater that its old position

deletes rows from SCIP_LP; the new position of a row must not be greater that its old position

Parameters

lpi	LP interface structure
dstat	deletion status of rows input: 1 if row should be deleted, 0 if not output: new position of row, -1 if row was deleted

Definition at line 1009 of file lpi_clp.cpp.

References BMSallocMemoryArray, BMSfreeMemoryArray, CHECK_ZERO, checkRangeInfo(), clearRangeInfo(), SCIP_LPi::clp, SCIP_LPi::cpxenv, SCIP_LPi::cpxlp, deleteRowsAndUpdateCurrentBasis(), delRangeVars(), ensureValMem(), getIndicesFromDense(), SCIP_LPi::grbmodel, SCIP_LPi::indarray, invalidateSolution(), SCIP_LPi::linear_program, SCIP_LPi::lpid, SCIP_LPi::messagehdlr, MOSEK_CALL, MosekEnv, SCIP_LPi::nrngrows, SCIP_LPi::nrows, NULL, SCIP_LPi::prob, QS_CONDRET, r, SCIP_LPi::rngrowmap, SCIP_LPi::rngrows, SCIP_LPi::rngvals, SCIP_LPi::rngvarsadded, SCIP_ALLOC, SCIP_CALL, SCIP_OKAY, SCIPdebugMessage, SCIPlpiClear(), SCIPlpiGetNRows(), SCIP_LPi::solstat, SOPLEX_TRY, SCIP_LPi::spx, SCIP_LPi::task, and SCIP_LPi::xprslp.

Referenced by lpDelRowset(), and SCIPlpiDelRows().

SCIPlpiClear()

SCIP_EXPORT SCIP_RETCODE SCIPlpiClear

(

SCIP_LPI *

lpi

)

clears the whole LP

Parameters

lpi	LP interface structure

Definition at line 1055 of file lpi_clp.cpp.

References CHECK_ZERO, checkRangeInfo(), clearRangeInfo(), SCIP_LPi::clp, SCIP_LPi::cpxenv, SCIP_LPi::cpxlp, SCIP_LPi::grbenv, SCIP_LPi::grbmodel, invalidateSolution(), SCIP_LPi::lastalgorithm, SCIP_LPi::linear_program, SCIP_LPi::lp_modified_since_last_solve, SCIP_LPi::lpid, SCIP_LPi::messagehdlr, MOSEK_CALL, MosekEnv, SCIP_LPi::name, SCIP_LPi::ncols, SCIP_LPi::nrows, NULL, SCIP_LPi::prob, QS_CONDRET, SCIP_CALL, SCIP_OKAY, SCIPdebugMessage, SCIPlpiChgBounds(), SCIPlpiDelCols(), SCIPlpiDelRows(), SCIPlpiGetNCols(), SCIPlpiGetNRows(), SCIP_LPi::solstat, SOPLEX_TRY, SCIP_LPi::spx, SCIP_LPi::task, and SCIP_LPi::xprslp.

Referenced by SCIPlpiDelRowset(), and SCIPlpiLoadColLP().

SCIPlpiChgBounds()

SCIP_EXPORT SCIP_RETCODE SCIPlpiChgBounds	(	SCIP_LPI *	lpi,
		int	ncols,
		const int *	ind,
		const SCIP_Real *	lb,
		const SCIP_Real *	ub
	)

changes lower and upper bounds of columns

Parameters

lpi	LP interface structure
ncols	number of columns to change bounds for
ind	column indices or NULL if ncols is zero
lb	values for the new lower bounds or NULL if ncols is zero
ub	values for the new upper bounds or NULL if ncols is zero

Definition at line 1075 of file lpi_clp.cpp.

References SCIP_LPi::bkx, CHECK_ZERO, checkRangeInfo(), SCIP_LPi::clp, CPX_MAGICZEROCONSTANT, SCIP_LPi::cpxenv, SCIP_LPi::cpxlp, ensureBkxMem(), ensureBoundchgMem(), ensureColMem(), EPSZ, generateMskBoundkeys(), SCIP_LPi::grbmodel, SCIP_LPi::iccha, invalidateSolution(), SCIP_LPi::larray, SCIP_LPi::linear_program, SCIP_LPi::lp_modified_since_last_solve, SCIP_LPi::lpid, SCIP_LPi::messagehdlr, MOSEK_CALL, MosekEnv, SCIP_LPi::ncols, NULL, SCIP_LPi::prob, QS_CONDRET, SCIP_CALL, SCIP_LPERROR, SCIP_OKAY, SCIP_Real, SCIPdebugMessage, SCIPdebugPrintf, SCIPerrorMessage, SCIPlpiChgSides(), SCIPlpiIsInfinity(), SCIPmessagePrintWarning(), SCIP_LPi::solstat, SCIP_LPi::spx, SCIP_LPi::task, SCIP_LPi::uarray, x, and SCIP_LPi::xprslp.

Referenced by fixAltLPVariable(), fixAltLPVariables(), lpFlushChgCols(), lpLexDualSimplex(), runBoundHeuristic(), SCIPcomputeConvexEnvelopeFacet(), SCIPconflictAnalyzeStrongbranch(), SCIPlpiClear(), SCIPlpiScaleCol(), unfixAltLPVariable(), and unfixAltLPVariables().

SCIPlpiChgSides()

SCIP_EXPORT SCIP_RETCODE SCIPlpiChgSides	(	SCIP_LPI *	lpi,
		int	nrows,
		const int *	ind,
		const SCIP_Real *	lhs,
		const SCIP_Real *	rhs
	)

changes left and right hand sides of rows

Parameters

lpi	LP interface structure
nrows	number of rows to change sides for
ind	row indices
lhs	new values for left hand sides
rhs	new values for right hand sides

Definition at line 1158 of file lpi_clp.cpp.

References SCIP_LPi::bkc, CHECK_ZERO, checkRangeInfo(), clearRangeInfo(), SCIP_LPi::clp, convertSides(), SCIP_LPi::cpxenv, SCIP_LPi::cpxlp, delRangeVars(), ensureBkcMem(), ensureRngrowmapMem(), ensureRngrowsMem(), ensureRowMem(), ensureSidechgMem(), generateMskBoundkeys(), SCIP_LPi::grbmodel, invalidateSolution(), SCIP_LPi::irhs, SCIP_LPi::irng, SCIP_LPi::isen, SCIP_LPi::linear_program, SCIP_LPi::lp_modified_since_last_solve, SCIP_LPi::lpid, SCIP_LPi::messagehdlr, MOSEK_CALL, MosekEnv, SCIP_LPi::nrngrows, SCIP_LPi::nrows, NULL, SCIP_LPi::prob, QS_CONDRET, SCIP_LPi::rhsarray, SCIP_LPi::rngarray, SCIP_LPi::rngindarray, SCIP_LPi::rngrowmap, SCIP_LPi::rngrows, SCIP_LPi::rngvals, SCIP_LPi::rngvarsadded, SCIP_CALL, SCIP_LPERROR, SCIP_OKAY, SCIPdebugMessage, SCIPlpiChgCoef(), SCIPlpiGetNCols(), SCIPlpiGetNRows(), SCIPmessagePrintWarning(), SCIPsortIntReal(), SCIP_LPi::senarray, SCIP_LPi::solstat, SCIP_LPi::spx, SCIP_LPi::task, x, and SCIP_LPi::xprslp.

Referenced by lpFlushChgRows(), lpLexDualSimplex(), runBoundHeuristic(), scaleFirstRow(), SCIPcomputeConvexEnvelopeFacet(), SCIPlpiChgBounds(), and SCIPlpiScaleRow().

SCIPlpiChgCoef()

SCIP_EXPORT SCIP_RETCODE SCIPlpiChgCoef	(	SCIP_LPI *	lpi,
		int	row,
		int	col,
		SCIP_Real	newval
	)

changes a single coefficient

Parameters

lpi	LP interface structure
row	row number of coefficient to change
col	column number of coefficient to change
newval	new value of coefficient

Definition at line 1188 of file lpi_clp.cpp.

References CHECK_ZERO, SCIP_LPi::clp, SCIP_LPi::cpxenv, SCIP_LPi::cpxlp, SCIP_LPi::grbmodel, invalidateSolution(), SCIP_LPi::linear_program, SCIP_LPi::lp_modified_since_last_solve, SCIP_LPi::lpid, SCIP_LPi::messagehdlr, MOSEK_CALL, MosekEnv, NULL, SCIP_LPi::prob, QS_CONDRET, SCIP_CALL, SCIP_OKAY, SCIPdebugMessage, SCIPlpiChgObjsen(), SCIP_LPi::solstat, SOPLEX_TRY, SCIP_LPi::spx, SCIP_LPi::task, and SCIP_LPi::xprslp.

Referenced by SCIPlpiChgSides(), SCIPlpiScaleCol(), SCIPlpiScaleRow(), updateFirstRow(), updateFirstRowGlobal(), and updateObjUpperbound().

SCIPlpiChgObjsen()

SCIP_EXPORT SCIP_RETCODE SCIPlpiChgObjsen	(	SCIP_LPI *	lpi,
		SCIP_OBJSEN	objsense
	)

changes the objective sense

Parameters

lpi	LP interface structure
objsense	new objective sense

Definition at line 1211 of file lpi_clp.cpp.

References CHECK_ZERO, SCIP_LPi::clp, SCIP_LPi::cpxenv, SCIP_LPi::cpxlp, cpxObjsen(), SCIP_LPi::grbmodel, invalidateSolution(), SCIP_LPi::linear_program, SCIP_LPi::lp_modified_since_last_solve, SCIP_LPi::lpid, SCIP_LPi::messagehdlr, MOSEK_CALL, MosekEnv, NULL, SCIP_LPi::prob, QS_CONDRET, SCIP_OBJSEN_MAXIMIZE, SCIP_OBJSEN_MINIMIZE, SCIP_OKAY, SCIPdebugMessage, SCIPlpiChgObj(), SENSE2MOSEK, SCIP_LPi::solstat, SOPLEX_TRY, SCIP_LPi::spx, spxObjsen(), SCIP_LPi::task, SCIP_LPi::xprslp, and xprsObjsen().

Referenced by SCIPlpiChgCoef(), SCIPlpiCreate(), and SCIPlpiLoadColLP().

SCIPlpiChgObj()

SCIP_EXPORT SCIP_RETCODE SCIPlpiChgObj	(	SCIP_LPI *	lpi,
		int	ncols,
		const int *	ind,
		const SCIP_Real *	obj
	)

changes objective values of columns in the LP

Parameters

lpi	LP interface structure
ncols	number of columns to change objective value for
ind	column indices to change objective value for
obj	new objective values for columns

Definition at line 1231 of file lpi_clp.cpp.

References CHECK_ZERO, SCIP_LPi::clp, SCIP_LPi::cpxenv, SCIP_LPi::cpxlp, SCIP_LPi::grbmodel, invalidateSolution(), SCIP_LPi::linear_program, SCIP_LPi::lp_modified_since_last_solve, SCIP_LPi::lpid, SCIP_LPi::messagehdlr, MOSEK_CALL, MosekEnv, SCIP_LPi::ncols, NULL, SCIP_LPi::prob, QS_CONDRET, SCIP_CALL, SCIP_LPERROR, SCIP_OKAY, SCIP_Real, SCIPdebugMessage, SCIPlpiScaleRow(), SCIPmessagePrintWarning(), SCIP_LPi::solstat, SCIP_LPi::spx, SCIP_LPi::task, x, and SCIP_LPi::xprslp.

Referenced by lpFlushChgCols(), lpLexDualSimplex(), SCIPcomputeConvexEnvelopeFacet(), SCIPlpiChgObjsen(), SCIPlpiScaleCol(), setAltLPObj(), and setAltLPObjZero().

SCIPlpiScaleRow()

SCIP_EXPORT SCIP_RETCODE SCIPlpiScaleRow	(	SCIP_LPI *	lpi,
		int	row,
		SCIP_Real	scaleval
	)

multiplies a row with a non-zero scalar; for negative scalars, the row's sense is switched accordingly

Parameters

lpi	LP interface structure
row	row number to scale
scaleval	scaling multiplier

Definition at line 1258 of file lpi_clp.cpp.

References SCIP_LPi::bkc, BMSallocMemoryArray, BMSfreeMemoryArray, CHECK_ZERO, checkRangeInfo(), SCIP_LPi::clp, SCIP_LPi::cpxenv, SCIP_LPi::cpxlp, ensureValMem(), fabs(), GRB_INFBOUND, SCIP_LPi::grbmodel, SCIP_LPi::indarray, infinity, invalidateSolution(), SCIP_LPi::linear_program, SCIP_LPi::lp_modified_since_last_solve, SCIP_LPi::lpid, SCIP_LPi::messagehdlr, MOSEK_CALL, MosekEnv, SCIP_LPi::ncols, NULL, SCIP_LPi::prob, QS_RETURN, QS_TESTG, scale_bound(), scale_vec(), SCIP_ALLOC, SCIP_CALL, SCIP_LPERROR, SCIP_OKAY, SCIP_Real, SCIPdebugMessage, SCIPerrorMessage, SCIPlpiChgCoef(), SCIPlpiChgSides(), SCIPlpiGetNCols(), SCIPlpiGetRows(), SCIPlpiGetSides(), SCIPlpiInfinity(), SCIPlpiIsInfinity(), SCIPlpiScaleCol(), SCIPmessagePrintWarning(), SCIP_LPi::solstat, SCIP_LPi::spx, SCIP_LPi::task, SCIP_LPi::valarray, x, and SCIP_LPi::xprslp.

Referenced by SCIPlpiChgObj().

SCIPlpiScaleCol()

SCIP_EXPORT SCIP_RETCODE SCIPlpiScaleCol	(	SCIP_LPI *	lpi,
		int	col,
		SCIP_Real	scaleval
	)

multiplies a column with a non-zero scalar; the objective value is multiplied with the scalar, and the bounds are divided by the scalar; for negative scalars, the column's bounds are switched

Parameters

lpi	LP interface structure
col	column number to scale
scaleval	scaling multiplier

Definition at line 1331 of file lpi_clp.cpp.

References SCIP_LPi::bkx, BMSallocMemoryArray, BMSfreeMemoryArray, CHECK_ZERO, checkRangeInfo(), SCIP_LPi::clp, SCIP_LPi::cpxenv, SCIP_LPi::cpxlp, ensureValMem(), SCIP_LPi::grbmodel, SCIP_LPi::indarray, infinity, invalidateSolution(), SCIP_LPi::linear_program, SCIP_LPi::lpid, SCIP_LPi::messagehdlr, MOSEK_CALL, MosekEnv, SCIP_LPi::nrows, NULL, SCIP_LPi::prob, QS_RETURN, QS_TESTG, scale_bound(), scale_vec(), SCIP_ALLOC, SCIP_CALL, SCIP_LPERROR, SCIP_OKAY, SCIP_Real, SCIPdebugMessage, SCIPlpiChgBounds(), SCIPlpiChgCoef(), SCIPlpiChgObj(), SCIPlpiGetCols(), SCIPlpiGetNRows(), SCIPlpiGetObj(), SCIPlpiInfinity(), SCIPlpiIsInfinity(), SCIPmessagePrintWarning(), SCIP_LPi::solstat, SCIP_LPi::spx, SCIP_LPi::task, SCIP_LPi::valarray, x, and SCIP_LPi::xprslp.

Referenced by SCIPlpiScaleRow().

SCIPlpiGetNRows()

SCIP_EXPORT SCIP_RETCODE SCIPlpiGetNRows	(	SCIP_LPI *	lpi,
		int *	nrows
	)

gets the number of rows in the LP

Parameters

lpi	LP interface structure
nrows	pointer to store the number of rows

Definition at line 1408 of file lpi_clp.cpp.

References CHECK_ZERO, SCIP_LPi::clp, SCIP_LPi::cpxenv, SCIP_LPi::cpxlp, SCIP_LPi::grbmodel, SCIP_LPi::linear_program, SCIP_LPi::lpid, SCIP_LPi::messagehdlr, MOSEK_CALL, MosekEnv, SCIP_LPi::nrows, NULL, SCIP_LPi::prob, SCIP_OKAY, SCIPdebugMessage, SCIPlpiGetNCols(), SCIP_LPi::spx, SCIP_LPi::task, and SCIP_LPi::xprslp.

Referenced by addAltLPColumn(), addRangeInfo(), checkRangeInfo(), SCIPcomputeConvexEnvelopeFacet(), SCIPlpFlush(), SCIPlpiAddCols(), SCIPlpiAddRows(), SCIPlpiChgSides(), SCIPlpiClear(), SCIPlpiDelRows(), SCIPlpiDelRowset(), SCIPlpiGetBase(), SCIPlpiGetBasisInd(), SCIPlpiGetBInvACol(), SCIPlpiGetBInvARow(), SCIPlpiGetBInvCol(), SCIPlpiGetBInvRow(), SCIPlpiGetDualfarkas(), SCIPlpiGetRows(), SCIPlpiGetSol(), SCIPlpiGetState(), SCIPlpiLoadColLP(), SCIPlpiScaleCol(), SCIPlpiSetBase(), SCIPlpiSetState(), SCIPlpiSolveBarrier(), SCIPlpiSolveDual(), SCIPlpiSolvePrimal(), solveClassification(), and solveMinIISC().

SCIPlpiGetNCols()

SCIP_EXPORT SCIP_RETCODE SCIPlpiGetNCols	(	SCIP_LPI *	lpi,
		int *	ncols
	)

gets the number of columns in the LP

Parameters

lpi	LP interface structure
ncols	pointer to store the number of cols

Definition at line 1426 of file lpi_clp.cpp.

References CHECK_ZERO, SCIP_LPi::clp, SCIP_LPi::cpxenv, SCIP_LPi::cpxlp, SCIP_LPi::grbmodel, SCIP_LPi::linear_program, SCIP_LPi::lpid, SCIP_LPi::messagehdlr, MOSEK_CALL, MosekEnv, SCIP_LPi::ncols, SCIP_LPi::nrngrows, NULL, SCIP_LPi::prob, SCIP_LPi::rngvarsadded, SCIP_OKAY, SCIPdebugMessage, SCIPlpiGetNNonz(), SCIP_LPi::spx, SCIP_LPi::task, and SCIP_LPi::xprslp.

Referenced by addAltLPColumn(), addRangeInfo(), BENDERS_CUTORACLE(), checkIISlocal(), checkLPBoundsClean(), computeRelIntPoint(), delRangeVars(), extendToCover(), scaleFirstRow(), SCIPcomputeConvexEnvelopeFacet(), SCIPlpFlush(), SCIPlpiAddRows(), SCIPlpiChgSides(), SCIPlpiClear(), SCIPlpiDelCols(), SCIPlpiDelColset(), SCIPlpiGetBase(), SCIPlpiGetBasisInd(), SCIPlpiGetBInvARow(), SCIPlpiGetBounds(), SCIPlpiGetCols(), SCIPlpiGetNRows(), SCIPlpiGetPrimalRay(), SCIPlpiGetSol(), SCIPlpiGetState(), SCIPlpiLoadColLP(), SCIPlpiScaleRow(), SCIPlpiSetBase(), SCIPlpiSetState(), SCIPlpiSolveBarrier(), SCIPlpiSolveDual(), SCIPlpiSolvePrimal(), solveClassification(), and solveMinIISC().

SCIPlpiGetObjsen()

SCIP_EXPORT SCIP_RETCODE SCIPlpiGetObjsen	(	SCIP_LPI *	lpi,
		SCIP_OBJSEN *	objsen
	)

gets the objective sense of the LP

gets objective sense of the LP

Parameters

lpi	LP interface structure
objsen	pointer to store objective sense

Definition at line 1657 of file lpi_clp.cpp.

References CHECK_ZERO, SCIP_LPi::clp, SCIP_LPi::cpxenv, SCIP_LPi::cpxlp, errorMessage(), SCIP_LPi::grbmodel, SCIP_LPi::linear_program, SCIP_LPi::lpid, SCIP_LPi::messagehdlr, MOSEK_CALL, MosekEnv, NULL, SCIP_LPi::prob, QS_CONDRET, SCIP_OBJSEN_MAXIMIZE, SCIP_OBJSEN_MINIMIZE, SCIP_OKAY, SCIP_PLUGINNOTFOUND, SCIPdebugMessage, SCIPlpiGetObj(), SCIP_LPi::spx, SCIP_LPi::task, and SCIP_LPi::xprslp.

Referenced by lpiStrongbranch(), lpiStrongbranches(), SCIPlpiGetObjval(), and SCIPlpiGetRowNames().

SCIPlpiGetNNonz()

SCIP_EXPORT SCIP_RETCODE SCIPlpiGetNNonz	(	SCIP_LPI *	lpi,
		int *	nnonz
	)

gets the number of nonzero elements in the LP constraint matrix

Parameters

lpi	LP interface structure
nnonz	pointer to store the number of nonzeros

Definition at line 1444 of file lpi_clp.cpp.

References CHECK_ZERO, SCIP_LPi::clp, SCIP_LPi::cpxenv, SCIP_LPi::cpxlp, errorMessage(), SCIP_LPi::grbmodel, SCIP_LPi::linear_program, SCIP_LPi::lpid, SCIP_LPi::messagehdlr, MOSEK_CALL, MosekEnv, SCIP_LPi::nrngrows, NULL, SCIP_LPi::prob, SCIP_LPi::rngvarsadded, SCIP_OKAY, SCIP_PLUGINNOTFOUND, SCIPdebugMessage, SCIPlpiGetCols(), SOPLEX_SUBVERSION, SCIP_LPi::spx, SCIP_LPi::task, and SCIP_LPi::xprslp.

Referenced by SCIPlpiGetCols(), SCIPlpiGetNCols(), SCIPlpiGetRows(), and SCIPlpiLoadColLP().

SCIPlpiGetCols()

SCIP_EXPORT SCIP_RETCODE SCIPlpiGetCols	(	SCIP_LPI *	lpi,
		int	firstcol,
		int	lastcol,
		SCIP_Real *	lb,
		SCIP_Real *	ub,
		int *	nnonz,
		int *	beg,
		int *	ind,
		SCIP_Real *	val
	)

gets columns from LP problem object; the arrays have to be large enough to store all values; Either both, lb and ub, have to be NULL, or both have to be non-NULL, either nnonz, beg, ind, and val have to be NULL, or all of them have to be non-NULL.

gets columns from LP problem object; the arrays have to be large enough to store all values Either both, lb and ub, have to be NULL, or both have to be non-NULL, either nnonz, beg, ind, and val have to be NULL, or all of them have to be non-NULL.

Parameters

lpi	LP interface structure
firstcol	first column to get from LP
lastcol	last column to get from LP
lb	buffer to store the lower bound vector, or NULL
ub	buffer to store the upper bound vector, or NULL
nnonz	pointer to store the number of nonzero elements returned, or NULL
beg	buffer to store start index of each column in ind- and val-array, or NULL
ind	buffer to store row indices of constraint matrix entries, or NULL
val	buffer to store values of constraint matrix entries, or NULL

Definition at line 1465 of file lpi_clp.cpp.

References BMScopyMemoryArray, CHECK_ZERO, SCIP_LPi::clp, SCIP_LPi::cpxenv, SCIP_LPi::cpxlp, debugCheckColrang(), ensureColMem(), ensureValMem(), errorMessage(), FALSE, getASlice(), SCIP_LPi::grbmodel, SCIP_LPi::iccnt, SCIP_LPi::indarray, SCIP_LPi::linear_program, SCIP_LPi::lpid, SCIP_LPi::messagehdlr, MosekEnv, SCIP_LPi::ncols, NULL, SCIP_LPi::prob, QS_RETURN, QS_TESTG, SCIP_CALL, SCIP_LPERROR, SCIP_OKAY, SCIP_PLUGINNOTFOUND, SCIPdebugMessage, SCIPerrorMessage, SCIPlpiGetBounds(), SCIPlpiGetNCols(), SCIPlpiGetNNonz(), SCIPlpiGetRows(), SCIP_LPi::spx, SCIP_LPi::task, and SCIP_LPi::xprslp.

Referenced by SCIPlpiGetNNonz(), and SCIPlpiScaleCol().

SCIPlpiGetRows()

SCIP_EXPORT SCIP_RETCODE SCIPlpiGetRows	(	SCIP_LPI *	lpi,
		int	firstrow,
		int	lastrow,
		SCIP_Real *	lhss,
		SCIP_Real *	rhss,
		int *	nnonz,
		int *	beg,
		int *	ind,
		SCIP_Real *	val
	)

gets rows from LP problem object; the arrays have to be large enough to store all values. Either both, lhs and rhs, have to be NULL, or both have to be non-NULL, either nnonz, beg, ind, and val have to be NULL, or all of them have to be non-NULL.

Parameters

lpi	LP interface structure
firstrow	first row to get from LP
lastrow	last row to get from LP
lhss	buffer to store left hand side vector, or NULL
rhss	buffer to store right hand side vector, or NULL
nnonz	pointer to store the number of nonzero elements returned, or NULL
beg	buffer to store start index of each row in ind- and val-array, or NULL
ind	buffer to store column indices of constraint matrix entries, or NULL
val	buffer to store values of constraint matrix entries, or NULL

Definition at line 1529 of file lpi_clp.cpp.

References BMSclearMemoryArray, BMScopyMemoryArray, CHECK_ZERO, SCIP_LPi::clp, SCIP_LPi::cpxenv, SCIP_LPi::cpxlp, debugCheckRowrang(), ensureRowMem(), ensureSidechgMem(), ensureValMem(), errorMessage(), getASlice(), SCIP_LPi::grbmodel, SCIP_LPi::indarray, SCIP_LPi::ircnt, SCIP_LPi::linear_program, SCIP_LPi::lpid, SCIP_LPi::messagehdlr, MosekEnv, SCIP_LPi::nrngrows, SCIP_LPi::nrows, NULL, SCIP_LPi::prob, QS_RETURN, QS_TESTG, r, reconvertSides(), SCIP_LPi::rhsarray, SCIP_LPi::rngarray, SCIP_LPi::rngrowmap, SCIP_LPi::rngrows, SCIP_LPi::rngvarsadded, SCIP_CALL, SCIP_INVALIDDATA, SCIP_LPERROR, SCIP_OKAY, SCIP_PLUGINNOTFOUND, SCIPABORT, SCIPdebugMessage, SCIPerrorMessage, SCIPlpiGetColNames(), SCIPlpiGetNNonz(), SCIPlpiGetNRows(), SCIPlpiGetSides(), SCIP_LPi::senarray, SCIP_LPi::spx, SCIP_LPi::task, TRUE, and SCIP_LPi::xprslp.

Referenced by scaleFirstRow(), SCIPlpiGetCols(), and SCIPlpiScaleRow().

SCIPlpiGetColNames()

SCIP_EXPORT SCIP_RETCODE SCIPlpiGetColNames	(	SCIP_LPI *	lpi,
		int	firstcol,
		int	lastcol,
		char **	colnames,
		char *	namestorage,
		int	namestoragesize,
		int *	storageleft
	)

gets column names

Parameters

lpi	LP interface structure
firstcol	first column to get name from LP
lastcol	last column to get name from LP
colnames	pointers to column names (of size at least lastcol-firstcol+1) or NULL if namestoragesize is zero
namestorage	storage for col names or NULL if namestoragesize is zero
namestoragesize	size of namestorage (if 0, storageleft returns the storage needed)
storageleft	amount of storage left (if < 0 the namestorage was not big enough) or NULL if namestoragesize is zero

Definition at line 1590 of file lpi_clp.cpp.

References BMSallocMemoryArray, CHECK_ZERO, SCIP_LPi::clp, SCIP_LPi::cpxenv, SCIP_LPi::cpxlp, errorMessage(), SCIP_LPi::grbmodel, SCIP_LPi::linear_program, SCIP_LPi::messagehdlr, MosekEnv, SCIP_LPi::ncols, NULL, SCIP_LPi::prob, QS_ERROR, SCIP_ALLOC, SCIP_LPERROR, SCIP_NOTIMPLEMENTED, SCIP_OKAY, SCIP_PLUGINNOTFOUND, SCIPdebugMessage, SCIPerrorMessage, SCIPlpiGetRowNames(), SCIP_LPi::spx, SCIP_LPi::task, and SCIP_LPi::xprslp.

Referenced by SCIPlpiGetRows().

SCIPlpiGetRowNames()

SCIP_EXPORT SCIP_RETCODE SCIPlpiGetRowNames	(	SCIP_LPI *	lpi,
		int	firstrow,
		int	lastrow,
		char **	rownames,
		char *	namestorage,
		int	namestoragesize,
		int *	storageleft
	)

gets row names

Parameters

lpi	LP interface structure
firstrow	first row to get name from LP
lastrow	last row to get name from LP
rownames	pointers to row names (of size at least lastrow-firstrow+1) or NULL if namestoragesize is zero
namestorage	storage for row names or NULL if namestoragesize is zero
namestoragesize	size of namestorage (if 0, -storageleft returns the storage needed)
storageleft	amount of storage left (if < 0 the namestorage was not big enough) or NULL if namestoragesize is zero

Definition at line 1614 of file lpi_clp.cpp.

References BMSallocMemoryArray, CHECK_ZERO, SCIP_LPi::clp, SCIP_LPi::cpxenv, SCIP_LPi::cpxlp, errorMessage(), SCIP_LPi::grbmodel, SCIP_LPi::linear_program, SCIP_LPi::messagehdlr, MosekEnv, SCIP_LPi::nrows, NULL, SCIP_LPi::prob, QS_ERROR, SCIP_ALLOC, SCIP_LPERROR, SCIP_NOTIMPLEMENTED, SCIP_OKAY, SCIP_PLUGINNOTFOUND, SCIPdebugMessage, SCIPerrorMessage, SCIPlpiGetObjsen(), SCIP_LPi::spx, SCIP_LPi::task, and SCIP_LPi::xprslp.

Referenced by SCIPlpiGetColNames().

SCIPlpiGetObj()

SCIP_EXPORT SCIP_RETCODE SCIPlpiGetObj	(	SCIP_LPI *	lpi,
		int	firstcol,
		int	lastcol,
		SCIP_Real *	vals
	)

gets objective coefficients from LP problem object

Parameters

lpi	LP interface structure
firstcol	first column to get objective coefficient for
lastcol	last column to get objective coefficient for
vals	array to store objective coefficients

Definition at line 1677 of file lpi_clp.cpp.

References BMScopyMemoryArray, CHECK_ZERO, SCIP_LPi::clp, SCIP_LPi::cpxenv, SCIP_LPi::cpxlp, ensureColMem(), errorMessage(), SCIP_LPi::grbmodel, SCIP_LPi::iccnt, SCIP_LPi::linear_program, SCIP_LPi::lpid, SCIP_LPi::messagehdlr, MOSEK_CALL, MosekEnv, NULL, SCIP_LPi::prob, QS_CONDRET, SCIP_CALL, SCIP_OKAY, SCIP_PLUGINNOTFOUND, SCIPdebugMessage, SCIPlpiGetBounds(), SCIP_LPi::spx, SCIP_LPi::task, and SCIP_LPi::xprslp.

Referenced by lpFlushChgCols(), lpLexDualSimplex(), SCIPlpiGetObjsen(), SCIPlpiScaleCol(), and SCIPlpMarkFlushed().

SCIPlpiGetBounds()

SCIP_EXPORT SCIP_RETCODE SCIPlpiGetBounds	(	SCIP_LPI *	lpi,
		int	firstcol,
		int	lastcol,
		SCIP_Real *	lbs,
		SCIP_Real *	ubs
	)

gets current bounds from LP problem object

Parameters

lpi	LP interface structure
firstcol	first column to get bounds for
lastcol	last column to get bounds for
lbs	array to store lower bound values, or NULL
ubs	array to store upper bound values, or NULL

Definition at line 1700 of file lpi_clp.cpp.

References BMScopyMemoryArray, CHECK_ZERO, SCIP_LPi::clp, SCIP_LPi::cpxenv, SCIP_LPi::cpxlp, ensureColMem(), errorMessage(), SCIP_LPi::grbmodel, SCIP_LPi::iccnt, SCIP_LPi::linear_program, SCIP_LPi::lpid, SCIP_LPi::messagehdlr, MOSEK_CALL, MosekEnv, NULL, SCIP_LPi::prob, QS_CONDRET, SCIP_CALL, SCIP_OKAY, SCIP_PLUGINNOTFOUND, SCIPdebugMessage, SCIPlpiGetNCols(), SCIPlpiGetSides(), SCIP_LPi::spx, SCIP_LPi::task, and SCIP_LPi::xprslp.

Referenced by checkLPBoundsClean(), lpFlushChgCols(), lpLexDualSimplex(), SCIPlpiGetCols(), SCIPlpiGetObj(), and SCIPlpMarkFlushed().

SCIPlpiGetSides()

SCIP_EXPORT SCIP_RETCODE SCIPlpiGetSides	(	SCIP_LPI *	lpi,
		int	firstrow,
		int	lastrow,
		SCIP_Real *	lhss,
		SCIP_Real *	rhss
	)

gets current row sides from LP problem object

Parameters

lpi	LP interface structure
firstrow	first row to get sides for
lastrow	last row to get sides for
lhss	array to store left hand side values, or NULL
rhss	array to store right hand side values, or NULL

Definition at line 1731 of file lpi_clp.cpp.

References BMSclearMemoryArray, BMScopyMemoryArray, CHECK_ZERO, SCIP_LPi::clp, SCIP_LPi::cpxenv, SCIP_LPi::cpxlp, ensureRowMem(), ensureSidechgMem(), errorMessage(), SCIP_LPi::grbmodel, SCIP_LPi::ircnt, SCIP_LPi::linear_program, SCIP_LPi::lpid, SCIP_LPi::messagehdlr, MOSEK_CALL, MosekEnv, NULL, SCIP_LPi::prob, QS_RETURN, QS_TESTG, reconvertSides(), SCIP_LPi::rhsarray, SCIP_LPi::rngarray, SCIP_CALL, SCIP_INVALIDDATA, SCIP_OKAY, SCIP_PLUGINNOTFOUND, SCIPABORT, SCIPdebugMessage, SCIPerrorMessage, SCIPlpiGetCoef(), SCIP_LPi::senarray, SCIP_LPi::spx, SCIP_LPi::task, and SCIP_LPi::xprslp.

Referenced by lpFlushChgRows(), lpLexDualSimplex(), SCIPlpiGetBounds(), SCIPlpiGetRows(), SCIPlpiScaleRow(), and SCIPlpMarkFlushed().

SCIPlpiGetCoef()

SCIP_EXPORT SCIP_RETCODE SCIPlpiGetCoef	(	SCIP_LPI *	lpi,
		int	row,
		int	col,
		SCIP_Real *	val
	)

gets a single coefficient

Parameters

lpi	LP interface structure
row	row number of coefficient
col	column number of coefficient
val	pointer to store the value of the coefficient

Definition at line 1762 of file lpi_clp.cpp.

References CHECK_ZERO, SCIP_LPi::clp, SCIP_LPi::cpxenv, SCIP_LPi::cpxlp, errorMessage(), SCIP_LPi::grbmodel, SCIP_LPi::linear_program, SCIP_LPi::lpid, SCIP_LPi::messagehdlr, MOSEK_CALL, MosekEnv, NULL, SCIP_LPi::prob, QS_CONDRET, SCIP_CALL, SCIP_OKAY, SCIP_PLUGINNOTFOUND, SCIPdebugMessage, SCIP_LPi::spx, spxSolve(), SCIP_LPi::task, and SCIP_LPi::xprslp.

Referenced by SCIPdummyDebugMethodForSun(), SCIPlpiGetSides(), and updateObjUpperbound().

SCIPlpiSolvePrimal()

SCIP_EXPORT SCIP_RETCODE SCIPlpiSolvePrimal

(

SCIP_LPI *

lpi

)

calls primal simplex to solve the LP

calls primal simplex to solve the LP

Parameters

lpi	LP interface structure

Definition at line 1796 of file lpi_clp.cpp.

References addRangeVars(), SCIP_LPi::algo, BMSallocClearMemoryArray, BMSallocMemoryArray, BMSfreeMemoryArray, CHECK_ZERO, checkRangeInfo(), SCIP_LPi::clearstate, SCIP_LPi::clp, SCIP_LPi::cpxenv, SCIP_LPi::cpxlp, SCIP_LPi::cpxparam, errorMessage(), FALSE, SCIP_LPi::fromscratch, getIntParam(), SCIP_LPi::grbenv, SCIP_LPi::grbmodel, SCIP_LPi::grbparam, SCIP_LPi::instabilityignored, invalidateSolution(), SCIP_LPi::iterations, SCIP_LPi::lastalgo, SCIP_LPi::lastalgorithm, SCIP_LPi::linear_program, LPI_QSOPT_ALGO_PRIMAL, SCIP_LPi::lpid, lpiSolve(), SCIP_LPi::messagehdlr, MOSEK_CALL, MosekEnv, MSK_getsolutionstatus(), SCIP_LPi::niterations, SCIP_LPi::nrngrows, NULL, optimizecount, SCIP_LPi::parameters, presolve(), SCIP_LPi::prob, QS_CONDRET, SCIP_LPi::rngvarsadded, SCIP_LPi::rowrepswitch, SCIP_ALLOC, SCIP_Bool, SCIP_CALL, SCIP_LPERROR, SCIP_NOMEMORY, SCIP_OKAY, SCIP_PLUGINNOTFOUND, SCIP_Real, SCIPdebugMessage, SCIPerrorMessage, SCIPlpiGetNCols(), SCIPlpiGetNRows(), SCIPlpiSolveDual(), SCIPlpiWriteLP(), SCIPlpiWriteState(), SCIP_LPi::setFactorizationFrequency, setIntParam(), setParameterValues(), SCIP_LPi::solisbasic, SCIP_LPi::solmethod, SCIP_LPi::solstat, SCIP_LPi::solved, SolveInternal(), SCIP_LPi::solver, SolveWSimplex(), SCIP_LPi::spx, spxSolve(), SCIP_LPi::startscratch, SCIP_LPi::task, SCIP_LPi::termcode, TRUE, SCIP_LPi::validFactorization, and SCIP_LPi::xprslp.

Referenced by checkAltLPInfeasible(), handle_singular(), lpLexDualSimplex(), lpPrimalSimplex(), polyscip::Polyscip::printResults(), SCIP_DECL_PARAMCHGD(), SCIPcomputeConvexEnvelopeFacet(), and spxSolve().

SCIPlpiSolveDual()

SCIP_EXPORT SCIP_RETCODE SCIPlpiSolveDual

(

SCIP_LPI *

lpi

)

calls dual simplex to solve the LP

calls dual simplex to solve the LP

Parameters

lpi	LP interface structure

Definition at line 1871 of file lpi_clp.cpp.

References addRangeVars(), SCIP_LPi::algo, CHECK_ZERO, checkRangeInfo(), SCIP_LPi::clearstate, SCIP_LPi::clp, SCIP_LPi::cpxenv, SCIP_LPi::cpxlp, SCIP_LPi::cpxparam, eps, errorMessage(), FALSE, SCIP_LPi::fromscratch, getDblParam(), getIntParam(), SCIP_LPi::grbenv, SCIP_LPi::grbmodel, SCIP_LPi::grbparam, SCIP_LPi::instabilityignored, invalidateSolution(), SCIP_LPi::iterations, SCIP_LPi::lastalgo, SCIP_LPi::lastalgorithm, SCIP_LPi::linear_program, LPI_QSOPT_ALGO_DUAL, SCIP_LPi::lpid, lpiSolve(), SCIP_LPi::messagehdlr, MOSEK_CALL, MosekEnv, MSK_getsolutionstatus(), SCIP_LPi::niterations, SCIP_LPi::nrngrows, NULL, optimizecount, SCIP_LPi::parameters, presolve(), SCIP_LPi::prob, QS_CONDRET, SCIP_LPi::rngvarsadded, SCIP_LPi::rowrepswitch, SCIP_Bool, SCIP_CALL, SCIP_LPERROR, SCIP_NOMEMORY, SCIP_OKAY, SCIP_PLUGINNOTFOUND, SCIP_Real, SCIPdebugMessage, SCIPerrorMessage, SCIPlpiGetNCols(), SCIPlpiGetNRows(), SCIPlpiGetObjval(), SCIPlpiIsObjlimExc(), SCIPlpiSolveBarrier(), SCIPlpiWriteLP(), SCIPlpiWriteState(), setDblParam(), SCIP_LPi::setFactorizationFrequency, setIntParam(), setParameterValues(), SCIP_LPi::solisbasic, SCIP_LPi::solmethod, SCIP_LPi::solstat, SCIP_LPi::solved, SolveInternal(), SCIP_LPi::solver, SolveWSimplex(), SCIP_LPi::spx, spxSolve(), SCIP_LPi::startscratch, SCIP_LPi::task, SCIP_LPi::termcode, TRUE, SCIP_LPi::validFactorization, and SCIP_LPi::xprslp.

Referenced by checkAltLPInfeasible(), computeRelIntPoint(), conflictAnalyzeLP(), lpDualSimplex(), lpiStrongbranch(), lpiStrongbranchIntegral(), lpLexDualSimplex(), runBoundHeuristic(), SCIPcomputeConvexEnvelopeFacet(), SCIPconflictAnalyzeStrongbranch(), SCIPlpiSolveBarrier(), SCIPlpiSolvePrimal(), and SCIPlpiStrongbranch().

SCIPlpiSolveBarrier()

SCIP_EXPORT SCIP_RETCODE SCIPlpiSolveBarrier	(	SCIP_LPI *	lpi,
		SCIP_Bool	crossover
	)

calls barrier or interior point algorithm to solve the LP with crossover to simplex basis

Parameters

lpi	LP interface structure
crossover	perform crossover

Definition at line 1948 of file lpi_clp.cpp.

References addRangeVars(), CHECK_ZERO, checkRangeInfo(), SCIP_LPi::clearstate, SCIP_LPi::clp, SCIP_LPi::cpxenv, SCIP_LPi::cpxlp, SCIP_LPi::cpxparam, errorMessage(), FALSE, filterTRMrescode(), SCIP_LPi::fromscratch, SCIP_LPi::grbenv, SCIP_LPi::grbmodel, SCIP_LPi::grbparam, SCIP_LPi::instabilityignored, invalidateSolution(), SCIP_LPi::iterations, SCIP_LPi::itercount, SCIP_LPi::lastalgo, SCIP_LPi::lastalgorithm, SCIP_LPi::lastsolvetype, SCIP_LPi::linear_program, SCIP_LPi::lpid, lpiSolve(), SCIP_LPi::messagehdlr, MOSEK_CALL, MosekEnv, MSK_getsolutionstatus(), SCIP_LPi::nrngrows, NULL, optimizecount, SCIP_LPi::parameters, presolve(), SCIP_LPi::prob, SCIP_LPi::rngvarsadded, SCIP_CALL, SCIP_INVALIDCALL, SCIP_LPERROR, SCIP_NOMEMORY, SCIP_NOTIMPLEMENTED, SCIP_OKAY, SCIP_PLUGINNOTFOUND, SCIP_UNUSED, SCIPdebugMessage, SCIPerrorMessage, SCIPlpiGetNCols(), SCIPlpiGetNRows(), SCIPlpiSolveDual(), SCIPlpiStartStrongbranch(), SCIPmessagePrintWarning(), setIntParam(), setParameterValues(), SCIP_LPi::solisbasic, SCIP_LPi::solmethod, SCIP_LPi::solstat, SCIP_LPi::solved, SCIP_LPi::solver, SCIP_LPi::spx, SCIP_LPi::task, SCIP_LPi::termcode, TRUE, and SCIP_LPi::xprslp.

Referenced by lpBarrier(), SCIPlpiSolveDual(), and SolveWSimplex().

SCIPlpiStartStrongbranch()

SCIP_EXPORT SCIP_RETCODE SCIPlpiStartStrongbranch

(

SCIP_LPI *

lpi

)

start strong branching - call before any strong branching

start strong branching - call before any strongbranching

start strong branching

Parameters

lpi	LP interface structure

Definition at line 1992 of file lpi_clp.cpp.

References SCIP_LPi::clp, SCIP_LPi::cpxenv, SCIP_LPi::cpxlp, SCIP_LPi::grbenv, SCIP_LPi::grbmodel, SCIP_LPi::linear_program, MosekEnv, NULL, SCIP_LPi::prob, SCIP_OKAY, SCIPlpiEndStrongbranch(), SCIP_LPi::solver, SCIP_LPi::spx, SCIP_LPi::task, updateScaledLP(), and SCIP_LPi::xprslp.

Referenced by SCIPconflictAnalyzeStrongbranch(), SCIPlpiSolveBarrier(), and SCIPlpStartStrongbranch().

SCIPlpiEndStrongbranch()

SCIP_EXPORT SCIP_RETCODE SCIPlpiEndStrongbranch

(

SCIP_LPI *

lpi

)

end strong branching - call after any strong branching

end strong branching - call after any strongbranching

end strong branching

Parameters

lpi	LP interface structure

Definition at line 2004 of file lpi_clp.cpp.

References SCIP_LPi::clp, SCIP_LPi::cpxenv, SCIP_LPi::cpxlp, SCIP_LPi::grbenv, SCIP_LPi::grbmodel, SCIP_LPi::linear_program, lpiStrongbranch(), NULL, SCIP_LPi::prob, SCIP_OKAY, SCIP_LPi::solver, SCIP_LPi::spx, and SCIP_LPi::xprslp.

Referenced by SCIPconflictAnalyzeStrongbranch(), SCIPlpEndStrongbranch(), and SCIPlpiStartStrongbranch().

SCIPlpiStrongbranchFrac()

SCIP_EXPORT SCIP_RETCODE SCIPlpiStrongbranchFrac	(	SCIP_LPI *	lpi,
		int	col,
		SCIP_Real	psol,
		int	itlim,
		SCIP_Real *	down,
		SCIP_Real *	up,
		SCIP_Bool *	downvalid,
		SCIP_Bool *	upvalid,
		int *	iter
	)

performs strong branching iterations on one fractional candidate

performs strong branching iterations on one fractional candidate

Note

last solve call must have been either simplex or barrier with crossover or base must have been set manually

Parameters

lpi	LP interface structure
col	column to apply strong branching on
psol	fractional current primal solution value of column
itlim	iteration limit for strong branchings
down	stores dual bound after branching column down
up	stores dual bound after branching column up
downvalid	stores whether the returned down value is a valid dual bound; otherwise, it can only be used as an estimate value
upvalid	stores whether the returned up value is a valid dual bound; otherwise, it can only be used as an estimate value
iter	stores total number of strong branching iterations, or -1; may be NULL

Definition at line 2269 of file lpi_clp.cpp.

References CHECK_ZERO, checkRangeInfo(), SCIP_LPi::clearstate, SCIP_LPi::cpxenv, SCIP_LPi::cpxlp, SCIP_LPi::cpxparam, EPSISINT, errorMessage(), FALSE, FEASTOL, SCIP_LPi::feastol, SCIP_LPi::fromscratch, lpiStrongbranch(), SCIP_LPi::messagehdlr, NULL, SCIP_LPi::previt, SCIP_LPi::prob, QS_CONDRET, SCIP_LPi::scaled_lp, SCIP_CALL, SCIP_LPERROR, SCIP_OKAY, SCIP_PLUGINNOTFOUND, SCIPdebugMessage, SCIPlpiStrongbranch(), SCIPlpiStrongbranchesFrac(), setIntParam(), setParameterValues(), strongbranch(), and TRUE.

Referenced by lpiStrongbranch(), and SCIPcolGetStrongbranch().

SCIPlpiStrongbranchesFrac()

SCIP_EXPORT SCIP_RETCODE SCIPlpiStrongbranchesFrac	(	SCIP_LPI *	lpi,
		int *	cols,
		int	ncols,
		SCIP_Real *	psols,
		int	itlim,
		SCIP_Real *	down,
		SCIP_Real *	up,
		SCIP_Bool *	downvalid,
		SCIP_Bool *	upvalid,
		int *	iter
	)

performs strong branching iterations on given fractional candidates

performs strong branching iterations on given fractional candidates

Note

last solve call must have been either simplex or barrier with crossover or base must have been set manually

Parameters

lpi	LP interface structure
cols	columns to apply strong branching on
ncols	number of columns
psols	fractional current primal solution values of columns
itlim	iteration limit for strong branchings
down	stores dual bounds after branching columns down
up	stores dual bounds after branching columns up
downvalid	stores whether the returned down values are valid dual bounds; otherwise, they can only be used as an estimate values
upvalid	stores whether the returned up values are a valid dual bounds; otherwise, they can only be used as an estimate values
iter	stores total number of strong branching iterations, or -1; may be NULL

Definition at line 2290 of file lpi_clp.cpp.

References CHECK_ZERO, checkRangeInfo(), SCIP_LPi::clearstate, SCIP_LPi::cpxenv, SCIP_LPi::cpxlp, SCIP_LPi::cpxparam, EPSISINT, errorMessage(), FALSE, FEASTOL, SCIP_LPi::feastol, SCIP_LPi::fromscratch, SCIP_LPi::linear_program, lpiStrongbranch(), lpiStrongbranches(), SCIP_LPi::messagehdlr, SCIP_LPi::ncols, NULL, SCIP_LPi::previt, SCIP_LPi::prob, QS_CONDRET, SCIP_CALL, SCIP_LPERROR, SCIP_NOTIMPLEMENTED, SCIP_OKAY, SCIP_PLUGINNOTFOUND, SCIPdebugMessage, SCIPerrorMessage, SCIPlpiStrongbranch(), SCIPlpiStrongbranchInt(), setIntParam(), setParameterValues(), and TRUE.

Referenced by SCIPcolGetStrongbranches(), and SCIPlpiStrongbranchFrac().

SCIPlpiStrongbranchInt()

SCIP_EXPORT SCIP_RETCODE SCIPlpiStrongbranchInt	(	SCIP_LPI *	lpi,
		int	col,
		SCIP_Real	psol,
		int	itlim,
		SCIP_Real *	down,
		SCIP_Real *	up,
		SCIP_Bool *	downvalid,
		SCIP_Bool *	upvalid,
		int *	iter
	)

performs strong branching iterations on one candidate with integral value

performs strong branching iterations on one candidate with integral value

Note

last solve call must have been either simplex or barrier with crossover or base must have been set manually

Parameters

lpi	LP interface structure
col	column to apply strong branching on
psol	current integral primal solution value of column
itlim	iteration limit for strong branchings
down	stores dual bound after branching column down
up	stores dual bound after branching column up
downvalid	stores whether the returned down value is a valid dual bound; otherwise, it can only be used as an estimate value
upvalid	stores whether the returned up value is a valid dual bound; otherwise, it can only be used as an estimate value
iter	stores total number of strong branching iterations, or -1; may be NULL

Definition at line 2315 of file lpi_clp.cpp.

References checkRangeInfo(), SCIP_LPi::cpxlp, EPSISINT, errorMessage(), FEASTOL, SCIP_LPi::feastol, SCIP_LPi::linear_program, lpiStrongbranch(), lpiStrongbranchIntegral(), NULL, SCIP_LPi::prob, QS_CONDRET, SCIP_CALL, SCIP_LPERROR, SCIP_OKAY, SCIP_PLUGINNOTFOUND, SCIP_Real, SCIPdebugMessage, SCIPlpiStrongbranch(), SCIPlpiStrongbranchesInt(), strongbranch(), and TRUE.

Referenced by SCIPcolGetStrongbranch(), and SCIPlpiStrongbranchesFrac().

SCIPlpiStrongbranchesInt()

SCIP_EXPORT SCIP_RETCODE SCIPlpiStrongbranchesInt	(	SCIP_LPI *	lpi,
		int *	cols,
		int	ncols,
		SCIP_Real *	psols,
		int	itlim,
		SCIP_Real *	down,
		SCIP_Real *	up,
		SCIP_Bool *	downvalid,
		SCIP_Bool *	upvalid,
		int *	iter
	)

performs strong branching iterations on given candidates with integral values

performs strong branching iterations on given candidates with integral values

Note

last solve call must have been either simplex or barrier with crossover or base must have been set manually

Parameters

lpi	LP interface structure
cols	columns to apply strong branching on
ncols	number of columns
psols	current integral primal solution values of columns
itlim	iteration limit for strong branchings
down	stores dual bounds after branching columns down
up	stores dual bounds after branching columns up
downvalid	stores whether the returned down values are valid dual bounds; otherwise, they can only be used as an estimate values
upvalid	stores whether the returned up values are a valid dual bounds; otherwise, they can only be used as an estimate values
iter	stores total number of strong branching iterations, or -1; may be NULL

Definition at line 2336 of file lpi_clp.cpp.

References checkRangeInfo(), SCIP_LPi::cpxlp, EPSISINT, errorMessage(), FEASTOL, SCIP_LPi::feastol, SCIP_LPi::linear_program, lpiStrongbranch(), lpiStrongbranches(), lpiStrongbranchIntegral(), SCIP_LPi::ncols, NULL, SCIP_LPi::prob, QS_CONDRET, SCIP_Bool, SCIP_CALL, SCIP_LPERROR, SCIP_NOTIMPLEMENTED, SCIP_OKAY, SCIP_PLUGINNOTFOUND, SCIP_Real, SCIP_UNUSED, SCIPdebugMessage, SCIPerrorMessage, SCIPlpiStrongbranch(), SCIPlpiWasSolved(), and TRUE.

Referenced by SCIPcolGetStrongbranches(), and SCIPlpiStrongbranchInt().

SCIPlpiWasSolved()

SCIP_EXPORT SCIP_Bool SCIPlpiWasSolved

(

SCIP_LPI *

lpi

)

returns whether a solve method was called after the last modification of the LP

Parameters

lpi	LP interface structure

Definition at line 2372 of file lpi_clp.cpp.

References SCIP_LPi::cpxenv, SCIP_LPi::cpxlp, errorMessageAbort(), FALSE, SCIP_LPi::lp_modified_since_last_solve, NULL, SCIP_LPi::prob, SCIP_Bool, SCIPlpiGetSolFeasibility(), SCIP_LPi::solstat, and SCIP_LPi::solved.

Referenced by performStrongbranchWithPropagation(), SCIPconflictAnalyzeLP(), and SCIPlpiStrongbranchesInt().

SCIPlpiGetSolFeasibility()

SCIP_EXPORT SCIP_RETCODE SCIPlpiGetSolFeasibility	(	SCIP_LPI *	lpi,
		SCIP_Bool *	primalfeasible,
		SCIP_Bool *	dualfeasible
	)

gets information about primal and dual feasibility of the current LP solution

The feasibility information is with respect to the last solving call and it is only relevant if SCIPlpiWasSolved() returns true. If the LP is changed, this information might be invalidated.

Note that primalfeasible and dualfeasible should only return true if the solver has proved the respective LP to be feasible. Thus, the return values should be equal to the values of SCIPlpiIsPrimalFeasible() and SCIPlpiIsDualFeasible(), respectively. Note that if feasibility cannot be proved, they should return false (even if the problem might actually be feasible).

gets information about primal and dual feasibility of the current LP solution

The feasibility information is with respect to the last solving call and it is only relevant if SCIPlpiWasSolved() returns true. If the LP is changed, this information might be invalidated.

Note that primalfeasible and dualfeasible should only return true if the solver has proved the respective LP to be feasible. Thus, the return values should be equal to the values of SCIPlpiIsPrimalFeasible() and SCIPlpiIsDualFeasible(), respectively. Note that if feasibility cannot be proved, they should return false (even if the problem might actually be feasible).

Parameters

lpi	LP interface structure
primalfeasible	pointer to store primal feasibility status
dualfeasible	pointer to store dual feasibility status

Definition at line 2391 of file lpi_clp.cpp.

References SCIP_LPi::algo, CHECK_ZERO, SCIP_LPi::clp, SCIP_LPi::cpxenv, SCIP_LPi::cpxlp, errorMessage(), FALSE, SCIP_LPi::grbenv, SCIP_LPi::grbmodel, SCIP_LPi::lastalgo, SCIP_LPi::lastsolvetype, LPI_QSOPT_ALGO_DUAL, LPI_QSOPT_ALGO_PRIMAL, SCIP_LPi::lpid, SCIP_LPi::messagehdlr, MOSEK_CALL, MosekEnv, MSK_getsolutionstatus(), NULL, SCIP_LPi::prob, SCIP_Bool, SCIP_LPERROR, SCIP_OKAY, SCIP_PLUGINNOTFOUND, SCIPdebugMessage, SCIPlpiExistsPrimalRay(), SCIPlpiIsDualFeasible(), SCIPlpiIsPrimalFeasible(), SCIP_LPi::solstat, SCIP_LPi::solver, SUMINFEASBOUND, SCIP_LPi::task, TRUE, and SCIP_LPi::xprslp.

Referenced by lpAlgorithm(), SCIPlpiStrongbranch(), and SCIPlpiWasSolved().

SCIPlpiExistsPrimalRay()

SCIP_EXPORT SCIP_Bool SCIPlpiExistsPrimalRay

(

SCIP_LPI *

lpi

)

returns TRUE iff LP is proven to have a primal unbounded ray (but not necessary a primal feasible point); this does not necessarily mean, that the solver knows and can return the primal ray

Parameters

lpi	LP interface structure

Definition at line 2436 of file lpi_clp.cpp.

References SCIP_LPi::clp, SCIP_LPi::cpxlp, errorMessageAbort(), FALSE, getSolutionStatus(), SCIP_LPi::grbmodel, SCIP_LPi::lpid, MosekEnv, NULL, SCIP_LPi::prob, SCIP_ABORT_FALSE, SCIP_Bool, SCIPdebugMessage, SCIPlpiHasPrimalRay(), SCIP_LPi::solstat, SCIP_LPi::solver, SCIP_LPi::spx, SCIP_LPi::task, and SCIP_LPi::xprslp.

Referenced by checkAltLPInfeasible(), lpSolve(), SCIPlpiGetSolFeasibility(), SCIPlpiIsDualInfeasible(), and SCIPlpiStrongbranch().

SCIPlpiHasPrimalRay()

SCIP_EXPORT SCIP_Bool SCIPlpiHasPrimalRay

(

SCIP_LPI *

lpi

)

returns TRUE iff LP is proven to have a primal unbounded ray (but not necessary a primal feasible point), and the solver knows and can return the primal ray

Parameters

lpi	LP interface structure

Definition at line 2454 of file lpi_clp.cpp.

References ABORT_ZERO, SCIP_LPi::clp, SCIP_LPi::cpxenv, SCIP_LPi::cpxlp, errorMessageAbort(), FALSE, getSolutionStatus(), SCIP_LPi::grbenv, SCIP_LPi::grbmodel, SCIP_LPi::lpid, SCIP_LPi::messagehdlr, MosekEnv, NULL, SCIP_LPi::prob, SCIP_ABORT_FALSE, SCIP_Bool, SCIPABORT, SCIPdebugMessage, SCIPlpiIsPrimalUnbounded(), SCIP_LPi::solmethod, SCIP_LPi::solstat, SCIP_LPi::solver, SCIP_LPi::spx, SCIP_LPi::task, and SCIP_LPi::xprslp.

Referenced by SCIPlpGetPrimalRay(), SCIPlpGetUnboundedSol(), and SCIPlpiExistsPrimalRay().

SCIPlpiIsPrimalUnbounded()

SCIP_EXPORT SCIP_Bool SCIPlpiIsPrimalUnbounded

(

SCIP_LPI *

lpi

)

returns TRUE iff LP is proven to be primal unbounded

returns TRUE iff LP is proven to be primal feasible and unbounded

Parameters

lpi	LP interface structure

Definition at line 2474 of file lpi_clp.cpp.

References ABORT_ZERO, SCIP_LPi::algo, SCIP_LPi::clp, SCIP_LPi::cpxenv, SCIP_LPi::cpxlp, errorMessageAbort(), FALSE, getSolutionStatus(), SCIP_LPi::grbenv, SCIP_LPi::grbmodel, SCIP_LPi::lastalgo, LPI_QSOPT_ALGO_PRIMAL, MosekEnv, NULL, SCIP_LPi::prob, SCIP_ABORT_FALSE, SCIP_Bool, SCIPABORT, SCIPdebugMessage, SCIPlpiIsPrimalInfeasible(), SCIP_LPi::solmethod, SCIP_LPi::solstat, SCIP_LPi::solver, SCIP_LPi::spx, SCIP_LPi::task, and SCIP_LPi::xprslp.

Referenced by checkAltLPInfeasible(), lpSolve(), and SCIPlpiHasPrimalRay().

SCIPlpiIsPrimalInfeasible()

SCIP_EXPORT SCIP_Bool SCIPlpiIsPrimalInfeasible

(

SCIP_LPI *

lpi

)

returns TRUE iff LP is proven to be primal infeasible

Parameters

lpi	LP interface structure

Definition at line 2488 of file lpi_clp.cpp.

References ABORT_ZERO, SCIP_LPi::clp, SCIP_LPi::cpxenv, SCIP_LPi::cpxlp, errorMessageAbort(), FALSE, SCIP_LPi::grbmodel, MosekEnv, NULL, SCIP_LPi::prob, SCIP_Bool, SCIPdebugMessage, SCIPlpiExistsDualRay(), SCIPlpiIsPrimalFeasible(), SCIP_LPi::solstat, SCIP_LPi::solver, SCIP_LPi::spx, SCIP_LPi::task, and SCIP_LPi::xprslp.

Referenced by checkAltLPInfeasible(), conflictAnalyzeLP(), getFarkasProof(), lpiStrongbranch(), lpiStrongbranchIntegral(), lpSolve(), polyscip::Polyscip::printResults(), runBoundHeuristic(), SCIP_DECL_PARAMCHGD(), SCIPconflictAnalyzeLP(), and SCIPlpiIsPrimalUnbounded().

SCIPlpiIsPrimalFeasible()

SCIP_EXPORT SCIP_Bool SCIPlpiIsPrimalFeasible

(

SCIP_LPI *

lpi

)

returns TRUE iff LP is proven to be primal feasible

Parameters

lpi	LP interface structure

Definition at line 2507 of file lpi_clp.cpp.

References ABORT_ZERO, SCIP_LPi::clp, SCIP_LPi::cpxenv, SCIP_LPi::cpxlp, eps, errorMessageAbort(), FALSE, getSolutionStatus(), SCIP_LPi::grbenv, SCIP_LPi::grbmodel, SCIP_LPi::lastalgo, SCIP_LPi::lpid, SCIP_LPi::messagehdlr, MosekEnv, NULL, SCIP_LPi::prob, SCIP_ABORT_FALSE, SCIP_Bool, SCIPABORT, SCIPdebugMessage, SCIPlpiExistsDualRay(), SCIP_LPi::solmethod, SCIP_LPi::solstat, SCIP_LPi::solver, SCIP_LPi::spx, SCIP_LPi::task, TRUE, XPRS_LP_OPTIMAL_SCALEDINFEAS, and SCIP_LPi::xprslp.

Referenced by candidateStoreWarmStartInfo(), lpSolve(), polyscip::Polyscip::printResults(), SCIPlpiGetSolFeasibility(), SCIPlpiIsOptimal(), and SCIPlpiIsPrimalInfeasible().

SCIPlpiExistsDualRay()

SCIP_EXPORT SCIP_Bool SCIPlpiExistsDualRay

(

SCIP_LPI *

lpi

)

returns TRUE iff LP is proven to have a dual unbounded ray (but not necessary a dual feasible point); this does not necessarily mean, that the solver knows and can return the dual ray

Parameters

lpi	LP interface structure

Definition at line 2523 of file lpi_clp.cpp.

References SCIP_LPi::algo, SCIP_LPi::clp, errorMessageAbort(), FALSE, getSolutionStatus(), SCIP_LPi::grbmodel, LPI_QSOPT_ALGO_DUAL, SCIP_LPi::lpid, MosekEnv, NULL, SCIP_LPi::prob, SCIP_ABORT_FALSE, SCIP_Bool, SCIPdebugMessage, SCIPlpiHasDualRay(), SCIP_LPi::solstat, SCIP_LPi::solver, SCIP_LPi::spx, SCIP_LPi::task, and SCIP_LPi::xprslp.

Referenced by SCIPlpiGetState(), SCIPlpiIsPrimalFeasible(), SCIPlpiIsPrimalInfeasible(), and SCIPlpiStrongbranch().

SCIPlpiHasDualRay()

SCIP_EXPORT SCIP_Bool SCIPlpiHasDualRay

(

SCIP_LPI *

lpi

)

returns TRUE iff LP is proven to have a dual unbounded ray (but not necessary a dual feasible point), and the solver knows and can return the dual ray

Parameters

lpi	LP interface structure

Definition at line 2542 of file lpi_clp.cpp.

References ABORT_ZERO, SCIP_LPi::algo, SCIP_LPi::clp, SCIP_LPi::cpxenv, SCIP_LPi::cpxlp, errorMessageAbort(), FALSE, getSolutionStatus(), SCIP_LPi::grbenv, SCIP_LPi::grbmodel, LPI_QSOPT_ALGO_DUAL, SCIP_LPi::lpid, SCIP_LPi::messagehdlr, MosekEnv, NULL, SCIP_LPi::prob, SCIP_ABORT_FALSE, SCIP_Bool, SCIPABORT, SCIPdebugMessage, SCIPlpiIsDualUnbounded(), SCIP_LPi::solstat, SCIP_LPi::solver, SCIP_LPi::spx, SCIP_LPi::task, TRUE, and SCIP_LPi::xprslp.

Referenced by getFarkasProof(), lpSolve(), SCIPlpiExistsDualRay(), and SCIPlpSolveAndEval().

SCIPlpiIsDualUnbounded()

SCIP_EXPORT SCIP_Bool SCIPlpiIsDualUnbounded

(

SCIP_LPI *

lpi

)

returns TRUE iff LP is proven to be dual unbounded

returns TRUE iff LP is dual unbounded

Parameters

lpi	LP interface structure

Definition at line 2564 of file lpi_clp.cpp.

References ABORT_ZERO, SCIP_LPi::algo, SCIP_LPi::clp, SCIP_LPi::cpxenv, SCIP_LPi::cpxlp, errorMessageAbort(), FALSE, SCIP_LPi::grbenv, SCIP_LPi::grbmodel, LPI_QSOPT_ALGO_DUAL, MosekEnv, NULL, SCIP_LPi::prob, SCIP_Bool, SCIPABORT, SCIPdebugMessage, SCIPlpiIsDualInfeasible(), SCIP_LPi::solmethod, SCIP_LPi::solstat, SCIP_LPi::solver, SCIP_LPi::spx, SCIP_LPi::task, and SCIP_LPi::xprslp.

Referenced by SCIPlpiHasDualRay().

SCIPlpiIsDualInfeasible()

SCIP_EXPORT SCIP_Bool SCIPlpiIsDualInfeasible

(

SCIP_LPI *

lpi

)

returns TRUE iff LP is proven to be dual infeasible

returns TRUE iff LP is dual infeasible

Parameters

lpi	LP interface structure

Definition at line 2581 of file lpi_clp.cpp.

References ABORT_ZERO, SCIP_LPi::algo, SCIP_LPi::clp, SCIP_LPi::cpxenv, SCIP_LPi::cpxlp, errorMessageAbort(), FALSE, SCIP_LPi::grbmodel, LPI_QSOPT_ALGO_DUAL, MosekEnv, NULL, SCIP_LPi::prob, SCIP_Bool, SCIPdebugMessage, SCIPlpiExistsPrimalRay(), SCIPlpiIsDualFeasible(), SCIP_LPi::solstat, SCIP_LPi::solver, SCIP_LPi::spx, SCIP_LPi::task, and SCIP_LPi::xprslp.

Referenced by SCIPlpiIsDualUnbounded().

SCIPlpiIsDualFeasible()

SCIP_EXPORT SCIP_Bool SCIPlpiIsDualFeasible

(

SCIP_LPI *

lpi

)

returns TRUE iff LP is proven to be dual feasible

Parameters

lpi	LP interface structure

Definition at line 2595 of file lpi_clp.cpp.

References ABORT_ZERO, SCIP_LPi::algo, SCIP_LPi::clp, SCIP_LPi::cpxenv, SCIP_LPi::cpxlp, errorMessageAbort(), FALSE, getSolutionStatus(), SCIP_LPi::grbenv, SCIP_LPi::grbmodel, LPI_QSOPT_ALGO_DUAL, SCIP_LPi::lpid, SCIP_LPi::messagehdlr, MosekEnv, NULL, SCIP_LPi::prob, SCIP_ABORT_FALSE, SCIP_Bool, SCIPABORT, SCIPdebugMessage, SCIPlpiIsOptimal(), SCIP_LPi::solmethod, SCIP_LPi::solstat, SCIP_LPi::solver, SCIP_LPi::spx, SCIP_LPi::task, TRUE, XPRS_LP_OPTIMAL_SCALEDINFEAS, and SCIP_LPi::xprslp.

Referenced by candidateStoreWarmStartInfo(), conflictAnalyzeLP(), getFarkasProof(), lpSolve(), performStrongbranchWithPropagation(), runBoundHeuristic(), SCIPlpiGetSolFeasibility(), SCIPlpiIsDualInfeasible(), and SCIPlpiIsOptimal().

SCIPlpiIsOptimal()

SCIP_EXPORT SCIP_Bool SCIPlpiIsOptimal

(

SCIP_LPI *

lpi

)

returns TRUE iff LP was solved to optimality

Parameters

lpi	LP interface structure

Definition at line 2609 of file lpi_clp.cpp.

References SCIP_LPi::clp, errorMessageAbort(), FALSE, getSolutionStatus(), SCIP_LPi::grbmodel, SCIP_LPi::lpid, MosekEnv, NULL, SCIP_LPi::prob, SCIP_ABORT_FALSE, SCIP_Bool, SCIPdebugMessage, SCIPlpiIsDualFeasible(), SCIPlpiIsObjlimExc(), SCIPlpiIsPrimalFeasible(), SCIPlpiIsStable(), SCIP_LPi::solstat, SCIP_LPi::solver, SCIP_LPi::spx, SCIP_LPi::task, XPRS_LP_OPTIMAL_SCALEDINFEAS, and SCIP_LPi::xprslp.

Referenced by checkAltLPInfeasible(), computeRelIntPoint(), conflictAnalyzeLP(), lpiStrongbranch(), lpiStrongbranchIntegral(), lpLexDualSimplex(), lpSolve(), SCIPlpiIsDualFeasible(), and SCIPlpiIsStable().

SCIPlpiIsStable()

SCIP_EXPORT SCIP_Bool SCIPlpiIsStable

(

SCIP_LPI *

lpi

)

returns TRUE iff current LP solution is stable

This function should return true if the solution is reliable, i.e., feasible and optimal (or proven infeasible/unbounded) with respect to the original problem. The optimality status might be with respect to a scaled version of the problem, but the solution might not be feasible to the unscaled original problem; in this case, SCIPlpiIsStable() should return false.

Parameters

lpi	LP interface structure

Definition at line 2633 of file lpi_clp.cpp.

References ABORT_ZERO, SCIP_LPi::checkcondition, SCIP_LPi::clp, SCIP_LPi::conditionlimit, SCIP_LPi::cpxenv, SCIP_LPi::cpxlp, ERROR, errorMessageAbort(), FALSE, SCIP_LPi::grbenv, SCIP_LPi::grbmodel, SCIP_LPi::lastalgorithm, MosekEnv, NULL, SCIP_LPi::prob, SCIP_Bool, SCIP_INVALID, SCIP_LPSOLQUALITY_ESTIMCONDITION, SCIP_OKAY, SCIP_Real, SCIPABORT, SCIPdebugMessage, SCIPlpiGetRealSolQuality(), SCIPlpiIsIterlimExc(), SCIPlpiIsObjlimExc(), SCIPlpiIsOptimal(), SCIPlpiIsTimelimExc(), SCIP_LPi::solstat, SCIP_LPi::solver, SCIP_LPi::spx, SCIP_LPi::task, SCIP_LPi::termcode, TRUE, XPRS_LP_OPTIMAL_SCALEDINFEAS, and SCIP_LPi::xprslp.

Referenced by checkAltLPInfeasible(), lpSolveStable(), SCIPlpiIsOptimal(), and SCIPlpiStrongbranch().

SCIPlpiIsObjlimExc()

SCIP_EXPORT SCIP_Bool SCIPlpiIsObjlimExc

(

SCIP_LPI *

lpi

)

returns TRUE iff the objective limit was reached

Parameters

lpi	LP interface structure

Definition at line 2676 of file lpi_clp.cpp.

References SCIP_LPi::clp, errorMessageAbort(), FALSE, SCIP_LPi::grbmodel, MosekEnv, NULL, SCIP_LPi::prob, SCIP_Bool, SCIPdebugMessage, SCIPlpiIsIterlimExc(), SCIP_LPi::solstat, SCIP_LPi::solver, SCIP_LPi::spx, SCIP_LPi::task, SCIP_LPi::termcode, TRUE, and SCIP_LPi::xprslp.

Referenced by conflictAnalyzeLP(), getFarkasProof(), lpiStrongbranch(), lpiStrongbranchIntegral(), lpSolve(), runBoundHeuristic(), SCIPlpiIsOptimal(), SCIPlpiIsStable(), SCIPlpiSolveDual(), and SCIPlpSolveAndEval().

SCIPlpiIsIterlimExc()

SCIP_EXPORT SCIP_Bool SCIPlpiIsIterlimExc

(

SCIP_LPI *

lpi

)

returns TRUE iff the iteration limit was reached

Parameters

lpi	LP interface structure

Definition at line 2706 of file lpi_clp.cpp.

References ABORT_ZERO, SCIP_LPi::clp, errorMessageAbort(), FALSE, SCIP_LPi::grbmodel, SCIP_LPi::messagehdlr, MosekEnv, SCIP_LPi::niterations, NULL, SCIP_LPi::parameters, SCIP_LPi::prob, SCIP_Bool, SCIPdebugMessage, SCIPlpiIsTimelimExc(), SCIP_LPi::solstat, SCIP_LPi::solver, SCIP_LPi::spx, SCIP_LPi::task, SCIP_LPi::termcode, TRUE, and SCIP_LPi::xprslp.

Referenced by computeRelIntPoint(), lpiStrongbranch(), lpiStrongbranchIntegral(), lpSolve(), lpSolveStable(), SCIPlpiIsObjlimExc(), and SCIPlpiIsStable().

SCIPlpiIsTimelimExc()

SCIP_EXPORT SCIP_Bool SCIPlpiIsTimelimExc

(

SCIP_LPI *

lpi

)

returns TRUE iff the time limit was reached

Parameters

lpi	LP interface structure

Definition at line 2722 of file lpi_clp.cpp.

References ABORT_ZERO, SCIP_LPi::clp, errorMessageAbort(), FALSE, SCIP_LPi::grbmodel, SCIP_LPi::lp_time_limit_was_reached, SCIP_LPi::messagehdlr, MosekEnv, NULL, SCIP_LPi::prob, SCIPdebugMessage, SCIPlpiGetInternalStatus(), SCIP_LPi::solstat, SCIP_LPi::solver, SCIP_LPi::spx, SCIP_LPi::task, SCIP_LPi::termcode, TRUE, and SCIP_LPi::xprslp.

Referenced by computeRelIntPoint(), lpSolve(), SCIPlpiIsIterlimExc(), and SCIPlpiIsStable().

SCIPlpiGetInternalStatus()

SCIP_EXPORT int SCIPlpiGetInternalStatus

(

SCIP_LPI *

lpi

)

returns the internal solution status of the solver

Parameters

lpi	LP interface structure

Definition at line 2738 of file lpi_clp.cpp.

References SCIP_LPi::clp, SCIP_LPi::cpxlp, errorMessageAbort(), FALSE, getSolutionStatus(), SCIP_LPi::grbmodel, SCIP_LPi::lpid, MosekEnv, NULL, SCIP_LPi::prob, SCIP_Bool, SCIP_OKAY, SCIPdebugMessage, SCIPlpiIgnoreInstability(), SCIP_LPi::solstat, SCIP_LPi::solver, SCIP_LPi::spx, SCIP_LPi::task, and SCIP_LPi::xprslp.

Referenced by checkAltLPInfeasible(), lpSolve(), and SCIPlpiIsTimelimExc().

SCIPlpiIgnoreInstability()

SCIP_EXPORT SCIP_RETCODE SCIPlpiIgnoreInstability	(	SCIP_LPI *	lpi,
		SCIP_Bool *	success
	)

tries to reset the internal status of the LP solver in order to ignore an instability of the last solving call

Parameters

lpi	LP interface structure
success	pointer to store, whether the instability could be ignored

Definition at line 1638 of file lpi_clp.cpp.

References SCIP_LPi::clp, SCIP_LPi::cpxlp, errorMessage(), FALSE, SCIP_LPi::grbmodel, SCIP_LPi::instabilityignored, SCIP_LPi::lpid, MosekEnv, NULL, SCIP_LPi::prob, SCIP_OKAY, SCIP_PLUGINNOTFOUND, SCIP_Real, SCIPdebugMessage, SCIPlpiGetObjval(), SCIP_LPi::solstat, SCIP_LPi::solver, SCIP_LPi::spx, SCIP_LPi::task, TRUE, and SCIP_LPi::xprslp.

Referenced by ignoreInstability(), and SCIPlpiGetInternalStatus().

SCIPlpiGetObjval()

SCIP_EXPORT SCIP_RETCODE SCIPlpiGetObjval	(	SCIP_LPI *	lpi,
		SCIP_Real *	objval
	)

gets objective value of solution

gets objective value of solution

Note

if the solution status is iteration limit reached (GRB_ITERATION_LIMIT), the objective value was not computed

Parameters

lpi	LP interface structure
objval	stores the objective value

Definition at line 2752 of file lpi_clp.cpp.

References CHECK_ZERO, SCIP_LPi::clp, SCIP_LPi::cpxenv, SCIP_LPi::cpxlp, errorMessage(), getDblParam(), SCIP_LPi::grbmodel, SCIP_LPi::lastsolvetype, SCIP_LPi::lpid, SCIP_LPi::messagehdlr, MOSEK_CALL, MosekEnv, NULL, SCIP_LPi::prob, QS_CONDRET, SCIP_CALL, SCIP_OBJSEN_MINIMIZE, SCIP_OKAY, SCIP_PLUGINNOTFOUND, SCIP_Real, SCIPdebugMessage, SCIPlpiGetObjsen(), SCIPlpiGetSol(), SCIPlpiInfinity(), SCIP_LPi::solstat, SCIP_LPi::solver, SCIP_LPi::spx, SCIP_LPi::task, and SCIP_LPi::xprslp.

Referenced by conflictAnalyzeLP(), getDualProof(), lpiStrongbranch(), lpiStrongbranchIntegral(), lpSolve(), performStrongbranchWithPropagation(), runBoundHeuristic(), SCIPlpiGetSol(), SCIPlpiIgnoreInstability(), SCIPlpiSolveDual(), and SCIPlpSolveAndEval().

SCIPlpiGetSol()

SCIP_EXPORT SCIP_RETCODE SCIPlpiGetSol	(	SCIP_LPI *	lpi,
		SCIP_Real *	objval,
		SCIP_Real *	primsol,
		SCIP_Real *	dualsol,
		SCIP_Real *	activity,
		SCIP_Real *	redcost
	)

gets primal and dual solution vectors for feasible LPs

Before calling this function, the caller must ensure that the LP has been solved to optimality, i.e., that SCIPlpiIsOptimal() returns true.

Parameters

lpi	LP interface structure
objval	stores the objective value, may be NULL if not needed
primsol	primal solution vector, may be NULL if not needed
dualsol	dual solution vector, may be NULL if not needed
activity	row activity vector, may be NULL if not needed
redcost	reduced cost vector, may be NULL if not needed

Definition at line 2774 of file lpi_clp.cpp.

References BMSallocMemoryArray, BMScopyMemoryArray, BMSfreeMemoryArray, CHECK_ZERO, SCIP_LPi::clp, SCIP_LPi::cpxenv, SCIP_LPi::cpxlp, ensureRowMem(), ensureSidechgMem(), ensureTabMem(), errorMessage(), fabs(), FEASTOL, SCIP_LPi::grbmodel, SCIP_LPi::ibas, SCIP_LPi::instabilityignored, SCIP_LPi::irhs, SCIP_LPi::irng, SCIP_LPi::isen, SCIP_LPi::lastalgo, SCIP_LPi::lastsolvetype, SCIP_LPi::linear_program, SCIP_LPi::lpid, SCIP_LPi::messagehdlr, MOSEK_CALL, MosekEnv, MSK_getsolutionstatus(), SCIP_LPi::ncols, SCIP_LPi::nrngrows, SCIP_LPi::nrows, NULL, SCIP_LPi::prob, QS_CONDRET, r, SCIP_LPi::rhsarray, SCIP_LPi::rngrowmap, SCIP_LPi::scaler, SCIP_ALLOC, SCIP_CALL, SCIP_INVALIDDATA, SCIP_LPERROR, SCIP_OKAY, SCIP_PLUGINNOTFOUND, SCIP_Real, SCIPABORT, SCIPdebugMessage, SCIPerrorMessage, SCIPlpiGetNCols(), SCIPlpiGetNRows(), SCIPlpiGetObjval(), SCIPlpiGetPrimalRay(), SCIPmessagePrintWarning(), SCIP_LPi::senarray, SCIP_LPi::solstat, SCIP_LPi::solver, SolveWSimplex(), SCIP_LPi::spx, SCIP_LPi::task, x, and SCIP_LPi::xprslp.

Referenced by BENDERS_CUTORACLE(), computeRelIntPoint(), extendToCover(), getDualProof(), lpLexDualSimplex(), SCIPcomputeConvexEnvelopeFacet(), SCIPlpGetSol(), SCIPlpGetUnboundedSol(), and SCIPlpiGetObjval().

SCIPlpiGetPrimalRay()

SCIP_EXPORT SCIP_RETCODE SCIPlpiGetPrimalRay	(	SCIP_LPI *	lpi,
		SCIP_Real *	ray
	)

gets primal ray for unbounded LPs

Parameters

lpi	LP interface structure
ray	primal ray

Definition at line 2818 of file lpi_clp.cpp.

References BMScopyMemoryArray, CHECK_ZERO, SCIP_LPi::clp, SCIP_LPi::cpxenv, SCIP_LPi::cpxlp, errorMessage(), SCIP_LPi::grbmodel, SCIP_LPi::lastsolvetype, SCIP_LPi::linear_program, SCIP_LPi::lpid, SCIP_LPi::messagehdlr, MOSEK_CALL, MosekEnv, NULL, SCIP_LPi::prob, SCIP_LPi::scaler, SCIP_CALL, SCIP_LPERROR, SCIP_OKAY, SCIP_PLUGINNOTFOUND, SCIP_Real, SCIPdebugMessage, SCIPerrorMessage, SCIPlpiGetDualfarkas(), SCIPlpiGetNCols(), SCIPmessagePrintWarning(), SCIP_LPi::solstat, SCIP_LPi::solver, SCIP_LPi::spx, SCIP_LPi::task, x, and SCIP_LPi::xprslp.

Referenced by SCIPlpGetPrimalRay(), SCIPlpGetUnboundedSol(), and SCIPlpiGetSol().

SCIPlpiGetDualfarkas()

SCIP_EXPORT SCIP_RETCODE SCIPlpiGetDualfarkas	(	SCIP_LPI *	lpi,
		SCIP_Real *	dualfarkas
	)

gets dual Farkas proof for infeasibility

gets dual farkas proof for infeasibility

Note

The Farkas proof might be numerically questionable which is indicated by "hasRay" use SCIPlpiHasDualRay() to check that!

Parameters

lpi	LP interface structure
dualfarkas	dual Farkas row multipliers

Definition at line 2843 of file lpi_clp.cpp.

References CHECK_ZERO, SCIP_LPi::clp, SCIP_LPi::cpxenv, SCIP_LPi::cpxlp, errorMessage(), fabs(), SCIP_LPi::feastol, SCIP_LPi::grbmodel, SCIP_LPi::lastsolvetype, SCIP_LPi::linear_program, SCIP_LPi::lpid, SCIP_LPi::messagehdlr, MOSEK_CALL, MosekEnv, NULL, SCIP_LPi::prob, QS_CONDRET, SCIP_LPi::scaler, SCIP_CALL, SCIP_LPERROR, SCIP_OKAY, SCIP_PLUGINNOTFOUND, SCIPdebugMessage, SCIPlpiGetIterations(), SCIPlpiGetNRows(), SCIPlpiInfinity(), SCIPmessagePrintWarning(), SCIP_LPi::solstat, SCIP_LPi::solver, SCIP_LPi::spx, SCIP_LPi::task, x, and SCIP_LPi::xprslp.

Referenced by getFarkasProof(), SCIPlpGetDualfarkas(), and SCIPlpiGetPrimalRay().

SCIPlpiGetIterations()

SCIP_EXPORT SCIP_RETCODE SCIPlpiGetIterations	(	SCIP_LPI *	lpi,
		int *	iterations
	)

gets the number of LP iterations of the last solve call

Parameters

lpi	LP interface structure
iterations	pointer to store the number of iterations of the last solve call

Definition at line 2907 of file lpi_clp.cpp.

References SCIP_LPi::clp, errorMessage(), SCIP_LPi::grbmodel, SCIP_LPi::iterations, SCIP_LPi::itercount, SCIP_LPi::lpid, MosekEnv, SCIP_LPi::niterations, NULL, SCIP_LPi::previt, SCIP_LPi::prob, QS_CONDRET, SCIP_OKAY, SCIP_PLUGINNOTFOUND, SCIPdebugMessage, SCIPlpiGetRealSolQuality(), SCIP_LPi::solver, SCIP_LPi::spx, SCIP_LPi::task, and SCIP_LPi::xprslp.

Referenced by conflictAnalyzeLP(), lpiStrongbranch(), lpiStrongbranchIntegral(), runBoundHeuristic(), SCIPconflictAnalyzeStrongbranch(), SCIPlpGetIterations(), and SCIPlpiGetDualfarkas().

SCIPlpiGetRealSolQuality()

SCIP_EXPORT SCIP_RETCODE SCIPlpiGetRealSolQuality	(	SCIP_LPI *	lpi,
		SCIP_LPSOLQUALITY	qualityindicator,
		SCIP_Real *	quality
	)

gets information about the quality of an LP solution

Such information is usually only available, if also a (maybe not optimal) solution is available. The LPI should return SCIP_INVALID for quality, if the requested quantity is not available.

gets information about the quality of an LP solution

Such information is usually only available, if also a (maybe not optimal) solution is available. The LPI should return SCIP_INVALID for quality, if the requested quality is not available.

Parameters

lpi	LP interface structure
qualityindicator	indicates which quality should be returned
quality	pointer to store quality number

Definition at line 2926 of file lpi_clp.cpp.

References CHECK_ZERO, SCIP_LPi::cpxenv, SCIP_LPi::cpxlp, getRedCostEst(), SCIP_LPi::grbmodel, SCIP_LPi::messagehdlr, MosekEnv, NULL, SCIP_INVALID, SCIP_INVALIDDATA, SCIP_LPSOLQUALITY_ESTIMCONDITION, SCIP_LPSOLQUALITY_EXACTCONDITION, SCIP_OKAY, SCIP_Real, SCIP_UNUSED, SCIPdebugMessage, SCIPerrorMessage, SCIPlpiGetBase(), SCIP_LPi::solver, SCIP_LPi::spx, and SCIP_LPi::task.

Referenced by checkAltLPInfeasible(), SCIP_DECL_DISPOUTPUT(), SCIPlpiGetIterations(), SCIPlpiIsStable(), and SCIPprintLPSolutionQuality().

SCIPlpiGetBase()

SCIP_EXPORT SCIP_RETCODE SCIPlpiGetBase	(	SCIP_LPI *	lpi,
		int *	cstat,
		int *	rstat
	)

gets current basis status for columns and rows; arrays must be large enough to store the basis status

gets current basis status for columns and rows; arrays must be large enough to store the basis status

Note

last solve call must have been either simplex or barrier with crossover or base must have been set manually

Parameters

lpi	LP interface structure
cstat	array to store column basis status, or NULL
rstat	array to store row basis status, or NULL (the status is need for the row and not for the slack column)

Definition at line 2953 of file lpi_clp.cpp.

References CHECK_ZERO, SCIP_LPi::clp, ConvertGlopConstraintStatus(), ConvertGlopVariableStatus(), convertstat_mosek2scip(), convertstat_mosek2scip_slack(), SCIP_LPi::cpxenv, SCIP_LPi::cpxlp, ensureRowMem(), ensureSidechgMem(), ensureTabMem(), errorMessage(), FALSE, getbase(), getRedCostEst(), SCIP_LPi::grbmodel, SCIP_LPi::ibas, SCIP_LPi::isen, SCIP_LPi::lastsolvetype, SCIP_LPi::linear_program, SCIP_LPi::lpid, SCIP_LPi::messagehdlr, MOSEK_CALL, MosekEnv, SCIP_LPi::ncols, SCIP_LPi::nrngrows, SCIP_LPi::nrows, NULL, SCIP_LPi::prob, QS_CONDRET, r, SCIP_LPi::rngrowmap, SCIP_BASESTAT_BASIC, SCIP_BASESTAT_LOWER, SCIP_BASESTAT_UPPER, SCIP_BASESTAT_ZERO, SCIP_CALL, SCIP_INVALIDDATA, SCIP_LPERROR, SCIP_OKAY, SCIP_PLUGINNOTFOUND, SCIP_Real, SCIPABORT, SCIPdebugMessage, SCIPerrorMessage, SCIPlpiGetNCols(), SCIPlpiGetNRows(), SCIPlpiSetBase(), SCIP_LPi::senarray, SCIP_LPi::skc, SCIP_LPi::skx, SCIP_LPi::solver, SCIP_LPi::spx, SCIP_LPi::task, TRUE, and SCIP_LPi::xprslp.

Referenced by lpLexDualSimplex(), SCIPconflictAnalyzeStrongbranch(), SCIPlpGetBase(), SCIPlpGetSol(), SCIPlpiGetRealSolQuality(), and SCIPlpiGetState().

SCIPlpiSetBase()

SCIP_EXPORT SCIP_RETCODE SCIPlpiSetBase	(	SCIP_LPI *	lpi,
		const int *	cstat,
		const int *	rstat
	)

sets current basis status for columns and rows

Parameters

lpi	LP interface structure
cstat	array with column basis status
rstat	array with row basis status

Definition at line 3053 of file lpi_clp.cpp.

References BMSallocMemoryArray, BMSfreeMemoryArray, CHECK_ZERO, SCIP_LPi::clearstate, SCIP_LPi::clp, ConvertSCIPConstraintStatusToSlackStatus(), ConvertSCIPVariableStatus(), convertstat_scip2mosek(), convertstat_scip2mosek_slack(), SCIP_LPi::cpxenv, SCIP_LPi::cpxlp, SCIP_LPi::cstat, ensureCstatMem(), ensureRowMem(), ensureRstatMem(), ensureStateMem(), ensureTabMem(), EPSEQ, errorMessage(), FALSE, SCIP_LPi::grbmodel, SCIP_LPi::ibas, invalidateSolution(), SCIP_LPi::isen, SCIP_LPi::linear_program, SCIP_LPi::lpid, SCIP_LPi::messagehdlr, MosekEnv, SCIP_LPi::ncols, SCIP_LPi::nrngrows, SCIP_LPi::nrows, NULL, SCIP_LPi::prob, QS_CONDRET, r, SCIP_LPi::rngrowmap, SCIP_LPi::rstat, SCIP_ALLOC, SCIP_BASESTAT_BASIC, SCIP_BASESTAT_LOWER, SCIP_BASESTAT_UPPER, SCIP_BASESTAT_ZERO, SCIP_CALL, SCIP_INVALIDDATA, SCIP_LPERROR, SCIP_OKAY, SCIP_PLUGINNOTFOUND, SCIPABORT, SCIPdebugMessage, SCIPerrorMessage, SCIPlpiGetBasisInd(), SCIPlpiGetNCols(), SCIPlpiGetNRows(), setbase(), SCIP_LPi::skc, SCIP_LPi::skx, SCIP_LPi::solver, SOPLEX_TRY, SCIP_LPi::spx, SCIP_LPi::task, and SCIP_LPi::xprslp.

Referenced by SCIPconflictAnalyzeStrongbranch(), SCIPlpiClearState(), SCIPlpiGetBase(), and SCIPlpiSetState().

SCIPlpiGetBasisInd()

SCIP_EXPORT SCIP_RETCODE SCIPlpiGetBasisInd	(	SCIP_LPI *	lpi,
		int *	bind
	)

returns the indices of the basic columns and rows; basic column n gives value n, basic row m gives value -1-m

Parameters

lpi	LP interface structure
bind	pointer to store basis indices ready to keep number of rows entries

Definition at line 3175 of file lpi_clp.cpp.

References BMSallocMemoryArray, BMSfreeMemoryArray, CHECK_ZERO, SCIP_LPi::clp, SCIP_LPi::cpxenv, SCIP_LPi::cpxlp, SCIP_LPi::cpxparam, errorMessage(), SCIP_LPi::factorization, SCIP_LPi::grbmodel, handle_singular(), SCIP_LPi::linear_program, SCIP_LPi::lpid, SCIP_LPi::messagehdlr, MOSEK_CALL, MosekEnv, SCIP_LPi::ncols, SCIP_LPi::nrows, NULL, SCIP_LPi::prob, QS_CONDRET, r, restoreLPData(), SCIP_LPi::rngrowmap, SCIP_LPi::rngrows, SCIP_ALLOC, SCIP_BASESTAT_BASIC, SCIP_BASESTAT_LOWER, SCIP_BASESTAT_UPPER, SCIP_BASESTAT_ZERO, SCIP_CALL, SCIP_CALL_QUIET, SCIP_LPERROR, SCIP_OKAY, SCIP_PLUGINNOTFOUND, SCIPdebugMessage, SCIPlpiGetBInvRow(), SCIPlpiGetNCols(), SCIPlpiGetNRows(), SCIPmessagePrintWarning(), setIntParam(), setParameterValues(), SCIP_LPi::solstat, SCIP_LPi::solver, SCIP_LPi::spx, SCIP_LPi::task, x, and SCIP_LPi::xprslp.

Referenced by lpiGetBInvVec(), SCIPlpGetBasisInd(), SCIPlpiGetBInvACol(), SCIPlpiGetBInvARow(), SCIPlpiGetBInvCol(), SCIPlpiGetBInvRow(), and SCIPlpiSetBase().

SCIPlpiGetBInvRow()

SCIP_EXPORT SCIP_RETCODE SCIPlpiGetBInvRow	(	SCIP_LPI *	lpi,
		int	row,
		SCIP_Real *	coef,
		int *	inds,
		int *	ninds
	)

get row of inverse basis matrix B^-1

Note

The LP interface defines slack variables to have coefficient +1. This means that if, internally, the LP solver uses a -1 coefficient, then rows associated with slacks variables whose coefficient is -1, should be negated; see also the explanation in lpi.h.

get row of inverse basis matrix B^-1

Note

The LP interface defines slack variables to have coefficient +1. This means that if, internally, the LP solver uses a -1 coefficient, then rows associated with slacks variables whose coefficient is -1, should be negated; see also the explanation in lpi.h.

get row of inverse basis matrix B^-1

Note

The LP interface defines slack variables to have coefficient +1. This means that if, internally, the LP solver uses a -1 coefficient, then rows associated with slacks variables whose coefficient is -1, should be negated; see also the explanation in lpi.h.

get row of inverse basis matrix B^-1

Note

The LP interface defines slack variables to have coefficient +1. This means that if, internally, the LP solver uses a -1 coefficient, then rows associated with slacks variables whose coefficient is -1, should be negated; see also the explanation in lpi.h.

get row of inverse basis matrix B^-1

Note

The LP interface defines slack variables to have coefficient +1. This means that if, internally, the LP solver uses a -1 coefficient, then rows associated with slacks variables whose coefficient is -1, should be negated; see also the explanation in lpi.h.

get row of inverse basis matrix B^-1

Note

The LP interface defines slack variables to have coefficient +1. This means that if, internally, the LP solver uses a -1 coefficient, then rows associated with slacks variables whose coefficient is -1, should be negated; see also the explanation in lpi.h.

Parameters

lpi	LP interface structure
row	row number
coef	pointer to store the coefficients of the row
inds	array to store the non-zero indices, or NULL
ninds	pointer to store the number of non-zero indices, or NULL (-1: if we do not store sparsity information)

Definition at line 3227 of file lpi_clp.cpp.

References b, BMSallocMemoryArray, BMSclearMemoryArray, BMSfreeMemoryArray, CHECK_ZERO, SCIP_LPi::clp, SCIP_LPi::cpxenv, SCIP_LPi::cpxlp, SCIP_LPi::cpxparam, ensureValMem(), eps, errorMessage(), fabs(), SCIP_LPi::factorization, SCIP_LPi::grbmodel, handle_singular(), SCIP_LPi::indarray, SCIP_LPi::linear_program, SCIP_LPi::lpid, lpiGetBInvVec(), SCIP_LPi::messagehdlr, MOSEK_CALL, MosekEnv, SCIP_LPi::nrows, NULL, SCIP_LPi::parameters, SCIP_LPi::prob, QS_CONDRET, r, restoreLPData(), SCIP_LPi::scaler, SCIP_ALLOC, SCIP_CALL, SCIP_CALL_QUIET, SCIP_LPERROR, SCIP_OKAY, SCIP_PLUGINNOTFOUND, SCIP_Real, SCIP_UNUSED, SCIPdebugMessage, SCIPlpiGetBasisInd(), SCIPlpiGetBInvCol(), SCIPlpiGetNRows(), SCIPmessagePrintWarning(), setIntParam(), setParameterValues(), SCIP_LPi::solver, SCIP_LPi::spx, SVECTOR, SCIP_LPi::task, SCIP_LPi::tmp_row, x, SCIP_LPi::xprslp, and y.

Referenced by SCIPlpGetBInvRow(), SCIPlpiGetBasisInd(), and SCIPlpiGetBInvARow().

SCIPlpiGetBInvCol()

SCIP_EXPORT SCIP_RETCODE SCIPlpiGetBInvCol	(	SCIP_LPI *	lpi,
		int	c,
		SCIP_Real *	coef,
		int *	inds,
		int *	ninds
	)

get column of inverse basis matrix B^-1

Note

The LP interface defines slack variables to have coefficient +1. This means that if, internally, the LP solver uses a -1 coefficient, then rows associated with slacks variables whose coefficient is -1, should be negated; see also the explanation in lpi.h.

get column of inverse basis matrix B^-1

Note

The LP interface defines slack variables to have coefficient +1. This means that if, internally, the LP solver uses a -1 coefficient, then rows associated with slacks variables whose coefficient is -1, should be negated; see also the explanation in lpi.h.

get column of inverse basis matrix B^-1

Note

The LP interface defines slack variables to have coefficient +1. This means that if, internally, the LP solver uses a -1 coefficient, then rows associated with slacks variables whose coefficient is -1, should be negated; see also the explanation in lpi.h.

get column of inverse basis matrix B^-1

Note

The LP interface defines slack variables to have coefficient +1. This means that if, internally, the LP solver uses a -1 coefficient, then rows associated with slacks variables whose coefficient is -1, should be negated; see also the explanation in lpi.h.

get column of inverse basis matrix B^-1

Note

The LP interface defines slack variables to have coefficient +1. This means that if, internally, the LP solver uses a -1 coefficient, then rows associated with slacks variables whose coefficient is -1, should be negated; see also the explanation in lpi.h.

get column of inverse basis matrix B^-1

Note

The LP interface defines slack variables to have coefficient +1. This means that if, internally, the LP solver uses a -1 coefficient, then rows associated with slacks variables whose coefficient is -1, should be negated; see also the explanation in lpi.h.

Parameters

lpi	LP interface structure
c	column number of B^-1; this is NOT the number of the column in the LP; you have to call SCIPlpiGetBasisInd() to get the array which links the B^-1 column numbers to the row and column numbers of the LP! c must be between 0 and nrows-1, since the basis has the size nrows * nrows
coef	pointer to store the coefficients of the column
inds	array to store the non-zero indices, or NULL
ninds	pointer to store the number of non-zero indices, or NULL (-1: if we do not store sparsity information)

Definition at line 3262 of file lpi_clp.cpp.

References b, BMSallocMemoryArray, BMSclearMemoryArray, BMSfreeMemoryArray, CHECK_ZERO, SCIP_LPi::clp, SCIP_LPi::cpxenv, SCIP_LPi::cpxlp, SCIP_LPi::cpxparam, ensureSidechgMem(), ensureValMem(), eps, errorMessage(), fabs(), SCIP_LPi::grbmodel, handle_singular(), SCIP_LPi::indarray, SCIP_LPi::linear_program, SCIP_LPi::lpid, lpiGetBInvVec(), SCIP_LPi::messagehdlr, MOSEK_CALL, MosekEnv, SCIP_LPi::nrows, NULL, SCIP_LPi::parameters, SCIP_LPi::prob, r, restoreLPData(), SCIP_LPi::scaler, SCIP_ALLOC, SCIP_CALL, SCIP_CALL_QUIET, SCIP_LPERROR, SCIP_OKAY, SCIP_PLUGINNOTFOUND, SCIP_Real, SCIP_UNUSED, SCIPdebugMessage, SCIPerrorMessage, SCIPlpiGetBasisInd(), SCIPlpiGetBInvARow(), SCIPlpiGetNRows(), SCIP_LPi::senarray, setIntParam(), setParameterValues(), SCIP_LPi::solver, SCIP_LPi::spx, SVECTOR, SCIP_LPi::task, SCIP_LPi::tmp_row, x, and SCIP_LPi::xprslp.

Referenced by lpiGetBInvVec(), SCIPlpGetBInvCol(), and SCIPlpiGetBInvRow().

SCIPlpiGetBInvARow()

SCIP_EXPORT SCIP_RETCODE SCIPlpiGetBInvARow	(	SCIP_LPI *	lpi,
		int	r,
		const SCIP_Real *	binvrow,
		SCIP_Real *	coef,
		int *	inds,
		int *	ninds
	)

get row of inverse basis matrix times constraint matrix B^-1 * A

Note

The LP interface defines slack variables to have coefficient +1. This means that if, internally, the LP solver uses a -1 coefficient, then rows associated with slacks variables whose coefficient is -1, should be negated; see also the explanation in lpi.h.

get row of inverse basis matrix times constraint matrix B^-1 * A

Note

The LP interface defines slack variables to have coefficient +1. This means that if, internally, the LP solver uses a -1 coefficient, then rows associated with slacks variables whose coefficient is -1, should be negated; see also the explanation in lpi.h.

get row of inverse basis matrix times constraint matrix B^-1 * A

Note

The LP interface defines slack variables to have coefficient +1. This means that if, internally, the LP solver uses a -1 coefficient, then rows associated with slacks variables whose coefficient is -1, should be negated; see also the explanation in lpi.h.

get row of inverse basis matrix times constraint matrix B^-1 * A

Note

The LP interface defines slack variables to have coefficient +1. This means that if, internally, the LP solver uses a -1 coefficient, then rows associated with slacks variables whose coefficient is -1, should be negated; see also the explanation in lpi.h.

get row of inverse basis matrix times constraint matrix B^-1 * A

Note

The LP interface defines slack variables to have coefficient +1. This means that if, internally, the LP solver uses a -1 coefficient, then rows associated with slacks variables whose coefficient is -1, should be negated; see also the explanation in lpi.h.

get row of inverse basis matrix times constraint matrix B^-1 * A

Note

The LP interface defines slack variables to have coefficient +1. This means that if, internally, the LP solver uses a -1 coefficient, then rows associated with slacks variables whose coefficient is -1, should be negated; see also the explanation in lpi.h.

Parameters

lpi	LP interface structure
r	row number
binvrow	row in (A_B)^-1 from prior call to SCIPlpiGetBInvRow(), or NULL
coef	vector to return coefficients of the row
inds	array to store the non-zero indices, or NULL
ninds	pointer to store the number of non-zero indices, or NULL (-1: if we do not store sparsity information)

Definition at line 3300 of file lpi_clp.cpp.

References BMSallocMemoryArray, BMSclearMemoryArray, BMScopyMemoryArray, BMSfreeMemoryArray, BMSfreeMemoryArrayNull, CHECK_ZERO, SCIP_LPi::clp, SCIP_LPi::cpxenv, SCIP_LPi::cpxlp, SCIP_LPi::cpxparam, ensureTabMem(), ensureValMem(), eps, errorMessage(), fabs(), SCIP_LPi::grbmodel, SCIP_LPi::indarray, SCIP_LPi::itab, SCIP_LPi::linear_program, SCIP_LPi::lpid, SCIP_LPi::messagehdlr, MOSEK_CALL, MosekEnv, SCIP_LPi::ncols, SCIP_LPi::nrows, NULL, SCIP_LPi::parameters, SCIP_LPi::prob, QS_CONDRET, r, restoreLPData(), SCIP_LPi::scaler, SCIP_ALLOC, SCIP_Bool, SCIP_CALL, SCIP_CALL_QUIET, SCIP_OKAY, SCIP_PLUGINNOTFOUND, SCIP_Real, SCIP_UNUSED, SCIPdebugMessage, SCIPlpiGetBasisInd(), SCIPlpiGetBInvACol(), SCIPlpiGetBInvRow(), SCIPlpiGetNCols(), SCIPlpiGetNRows(), setIntParam(), setParameterValues(), SCIP_LPi::solver, SCIP_LPi::spx, SVECTOR, SCIP_LPi::task, SCIP_LPi::tmp_row, SCIP_LPi::valarray, x, and SCIP_LPi::xprslp.

Referenced by SCIPlpGetBInvARow(), and SCIPlpiGetBInvCol().

SCIPlpiGetBInvACol()

SCIP_EXPORT SCIP_RETCODE SCIPlpiGetBInvACol	(	SCIP_LPI *	lpi,
		int	c,
		SCIP_Real *	coef,
		int *	inds,
		int *	ninds
	)

get column of inverse basis matrix times constraint matrix B^-1 * A

Note

The LP interface defines slack variables to have coefficient +1. This means that if, internally, the LP solver uses a -1 coefficient, then rows associated with slacks variables whose coefficient is -1, should be negated; see also the explanation in lpi.h.

get column of inverse basis matrix times constraint matrix B^-1 * A

Note

The LP interface defines slack variables to have coefficient +1. This means that if, internally, the LP solver uses a -1 coefficient, then rows associated with slacks variables whose coefficient is -1, should be negated; see also the explanation in lpi.h.

get column of inverse basis matrix times constraint matrix B^-1 * A

Note

The LP interface defines slack variables to have coefficient +1. This means that if, internally, the LP solver uses a -1 coefficient, then rows associated with slacks variables whose coefficient is -1, should be negated; see also the explanation in lpi.h.

get column of inverse basis matrix times constraint matrix B^-1 * A

get column of inverse basis matrix times constraint matrix B^-1 * A

Note

The LP interface defines slack variables to have coefficient +1. This means that if, internally, the LP solver uses a -1 coefficient, then rows associated with slacks variables whose coefficient is -1, should be negated; see also the explanation in lpi.h.

get column of inverse basis matrix times constraint matrix B^-1 * A

Note

The LP interface defines slack variables to have coefficient +1. This means that if, internally, the LP solver uses a -1 coefficient, then rows associated with slacks variables whose coefficient is -1, should be negated; see also the explanation in lpi.h.

Parameters

lpi	LP interface structure
c	column number
coef	vector to return coefficients of the column
inds	array to store the non-zero indices, or NULL
ninds	pointer to store the number of non-zero indices, or NULL (-1: if we do not store sparsity information)

Definition at line 3335 of file lpi_clp.cpp.

References BMSallocMemoryArray, BMSclearMemoryArray, BMSfreeMemoryArray, CHECK_ZERO, SCIP_LPi::clp, SCIP_LPi::cpxenv, SCIP_LPi::cpxlp, SCIP_LPi::cpxparam, ensureSidechgMem(), ensureValMem(), eps, errorMessage(), fabs(), SCIP_LPi::grbmodel, handle_singular(), SCIP_LPi::indarray, SCIP_LPi::linear_program, SCIP_LPi::lpid, lpiGetBInvVec(), SCIP_LPi::messagehdlr, MOSEK_CALL, MosekEnv, SCIP_LPi::nrows, NULL, SCIP_LPi::parameters, SCIP_LPi::prob, r, restoreLPData(), SCIP_LPi::scaler, SCIP_ALLOC, SCIP_CALL, SCIP_CALL_QUIET, SCIP_LPERROR, SCIP_OKAY, SCIP_PLUGINNOTFOUND, SCIP_Real, SCIP_UNUSED, SCIPdebugMessage, SCIPerrorMessage, SCIPlpiGetBasisInd(), SCIPlpiGetNRows(), SCIPlpiGetState(), SCIP_LPi::senarray, setIntParam(), setParameterValues(), SCIP_LPi::solver, SCIP_LPi::spx, SVECTOR, SCIP_LPi::task, SCIP_LPi::tmp_column, SCIP_LPi::valarray, x, and SCIP_LPi::xprslp.

Referenced by SCIPlpGetBInvACol(), and SCIPlpiGetBInvARow().

SCIPlpiGetState()

SCIP_EXPORT SCIP_RETCODE SCIPlpiGetState	(	SCIP_LPI *	lpi,
		BMS_BLKMEM *	blkmem,
		SCIP_LPISTATE **	lpistate
	)

stores LPi state (like basis information) into lpistate object

stores LP state (like basis information) into lpistate object

Note

last solve call must have been either simplex or barrier with crossover or base must have been set manually

Parameters

lpi	LP interface structure
blkmem	block memory
lpistate	pointer to LPi state information (like basis information)

Definition at line 3375 of file lpi_clp.cpp.

References BMSallocBlockMemory, CHECK_ZERO, checkState(), SCIP_LPi::clearstate, SCIP_LPi::clp, SCIP_LPi::cpxenv, SCIP_LPi::cpxlp, SCIP_LPi::cstat, ensureColMem(), ensureCstatMem(), ensureRowMem(), ensureRstatMem(), errorMessage(), getBase(), getbase(), SCIP_LPi::grbmodel, SCIP_LPi::iccnt, SCIP_LPi::ircnt, SCIP_LPi::lastsolvetype, SCIP_LPi::lpid, lpistateCreate(), lpistatePack(), SCIP_LPi::messagehdlr, MOSEK_CALL, MosekEnv, MSK_getsolutionstatus(), SCIP_LPi::ncols, SCIP_LPi::nrngrows, SCIP_LPi::nrows, NULL, SCIP_LPiState::num, optimizecount, SCIP_LPi::prob, SCIP_LPi::rstat, SCIP_ALLOC, SCIP_Bool, SCIP_CALL, SCIP_OKAY, SCIP_PLUGINNOTFOUND, SCIPdebugMessage, SCIPlpiExistsDualRay(), SCIPlpiGetBase(), SCIPlpiGetNCols(), SCIPlpiGetNRows(), SCIPlpiSetState(), SCIP_LPi::solisbasic, SCIP_LPiState::solsta, SCIP_LPi::solver, SCIP_LPi::spx, SCIP_LPi::task, and SCIP_LPi::xprslp.

Referenced by candidateStoreWarmStartInfo(), SCIPlpGetState(), SCIPlpiGetBInvACol(), and SCIPlpStartDive().

SCIPlpiSetState()

SCIP_EXPORT SCIP_RETCODE SCIPlpiSetState	(	SCIP_LPI *	lpi,
		BMS_BLKMEM *	blkmem,
		const SCIP_LPISTATE *	lpistate
	)

loads LPi state (like basis information) into solver; note that the LP might have been extended with additional columns and rows since the state was stored with SCIPlpiGetState()

Parameters

lpi	LP interface structure
blkmem	block memory
lpistate	LPi state information (like basis information), or NULL

Definition at line 3415 of file lpi_clp.cpp.

References CHECK_ZERO, SCIP_LPi::clearstate, SCIP_LPi::clp, SCIP_LPi::cpxenv, SCIP_LPi::cpxlp, SCIP_LPi::cstat, ensureColMem(), ensureCstatMem(), ensureRowMem(), ensureRstatMem(), ensureStateMem(), ensureTabMem(), errorMessage(), FALSE, getbase(), SCIP_LPi::grbmodel, SCIP_LPi::ibas, SCIP_LPi::iccnt, invalidateSolution(), SCIP_LPi::ircnt, SCIP_LPi::isen, SCIP_LPi::lastsolvetype, lpistateUnpack(), SCIP_LPi::messagehdlr, MOSEK_CALL, MosekEnv, SCIP_LPi::ncols, SCIP_LPiState::ncols, SCIP_LPi::nrngrows, SCIP_LPiState::nrngrows, SCIP_LPi::nrows, SCIP_LPiState::nrows, NULL, SCIP_LPiState::num, SCIP_LPiState::packcstat, SCIP_LPiState::packrstat, SCIP_LPi::prob, QS_CONDRET, REALABS, SCIP_LPi::rstat, SCIP_BASESTAT_BASIC, SCIP_BASESTAT_LOWER, SCIP_BASESTAT_UPPER, SCIP_BASESTAT_ZERO, SCIP_CALL, SCIP_INVALIDDATA, SCIP_OKAY, SCIP_PLUGINNOTFOUND, SCIP_Real, SCIPABORT, SCIPdebugMessage, SCIPerrorMessage, SCIPlpiClearState(), SCIPlpiGetNCols(), SCIPlpiGetNRows(), SCIPlpiIsInfinity(), SCIPlpiSetBase(), setBase(), setbase(), SCIP_LPi::skc, SCIP_LPi::skx, SCIP_LPiState::solsta, SCIP_LPi::solver, SCIP_LPi::spx, SCIP_LPi::task, and SCIP_LPi::xprslp.

Referenced by SCIPlpiGetState(), and SCIPlpSetState().

SCIPlpiClearState()

SCIP_EXPORT SCIP_RETCODE SCIPlpiClearState

(

SCIP_LPI *

lpi

)

clears current LPi state (like basis information) of the solver

Parameters

lpi	LP interface structure

Definition at line 3473 of file lpi_clp.cpp.

References BMSallocMemoryArray, BMSfreeMemoryArray, CHECK_ZERO, SCIP_LPi::clearstate, SCIP_LPi::clp, SCIP_LPi::cstat, SCIP_LPi::grbmodel, SCIP_LPi::messagehdlr, MosekEnv, SCIP_LPi::ncols, SCIP_LPi::nrows, NULL, SCIP_LPi::prob, SCIP_LPi::rstat, SCIP_ALLOC, SCIP_BASESTAT_BASIC, SCIP_BASESTAT_LOWER, SCIP_CALL, SCIP_LPERROR, SCIP_OKAY, SCIPdebugMessage, SCIPlpiFreeState(), SCIPlpiSetBase(), SCIPmessagePrintWarning(), SCIP_LPi::solver, SCIP_LPi::spx, SCIP_LPi::task, TRUE, SCIP_LPi::validFactorization, and x.

Referenced by SCIPlpiSetState(), and SCIPtreeEndProbing().

SCIPlpiFreeState()

SCIP_EXPORT SCIP_RETCODE SCIPlpiFreeState	(	SCIP_LPI *	lpi,
		BMS_BLKMEM *	blkmem,
		SCIP_LPISTATE **	lpistate
	)

frees LPi state information

frees LP state information

Parameters

lpi	LP interface structure
blkmem	block memory
lpistate	pointer to LPi state information (like basis information)

Definition at line 3489 of file lpi_clp.cpp.

References SCIP_LPi::lpid, lpistateFree(), MosekEnv, NULL, SCIP_Bool, SCIP_OKAY, SCIPdebugMessage, SCIPlpiHasStateBasis(), SCIP_LPi::solver, and SCIP_LPi::task.

Referenced by SCIPlpFreeState(), SCIPlpiClearState(), and warmStartInfoFree().

SCIPlpiHasStateBasis()

SCIP_EXPORT SCIP_Bool SCIPlpiHasStateBasis	(	SCIP_LPI *	lpi,
		SCIP_LPISTATE *	lpistate
	)

checks, whether the given LPi state contains simplex basis information

checks, whether the given LP state contains simplex basis information

Parameters

lpi	LP interface structure
lpistate	LP state information (like basis information), or NULL

Definition at line 3508 of file lpi_clp.cpp.

References errorMessageAbort(), FALSE, SCIP_LPi::lpid, MosekEnv, NULL, SCIP_LPiState::num, SCIP_LPiState::packcstat, SCIPdebugMessage, SCIPlpiReadState(), SCIP_LPi::solver, SCIP_LPi::task, and TRUE.

Referenced by SCIPlpiFreeState(), and SCIPlpSetState().

SCIPlpiReadState()

SCIP_EXPORT SCIP_RETCODE SCIPlpiReadState	(	SCIP_LPI *	lpi,
		const char *	fname
	)

reads LPi state (like basis information from a file

reads LP state (like basis information) from a file

reads LP state (like basis information from a file

reads LP state (like basis information) from a file

Note

last solve call must have been either simplex or barrier with crossover or base must have been set manually

Parameters

lpi	LP interface structure
fname	file name

Definition at line 3518 of file lpi_clp.cpp.

References CHECK_ZERO, SCIP_LPi::clearstate, SCIP_LPi::clp, SCIP_LPi::cpxenv, SCIP_LPi::cpxlp, errorMessage(), FALSE, SCIP_LPi::grbmodel, SCIP_LPi::messagehdlr, MOSEK_CALL, MosekEnv, NULL, SCIP_LPi::prob, SCIP_LPERROR, SCIP_NOTIMPLEMENTED, SCIP_OKAY, SCIP_PLUGINNOTFOUND, SCIP_READERROR, SCIPdebugMessage, SCIPerrorMessage, SCIPlpiWriteState(), SCIP_LPi::solver, SOPLEX_TRY, SCIP_LPi::spx, SCIP_LPi::task, and SCIP_LPi::xprslp.

Referenced by SCIPlpiHasStateBasis().

SCIPlpiWriteState()

SCIP_EXPORT SCIP_RETCODE SCIPlpiWriteState	(	SCIP_LPI *	lpi,
		const char *	fname
	)

writes LPi state (i.e. basis information) to a file

Parameters

lpi	LP interface structure
fname	file name

Definition at line 3538 of file lpi_clp.cpp.

References CHECK_ZERO, SCIP_LPi::clearstate, SCIP_LPi::clp, SCIP_LPi::cpxenv, SCIP_LPi::cpxlp, errorMessage(), FALSE, SCIP_LPi::grbmodel, SCIP_LPi::lastsolvetype, SCIP_LPi::messagehdlr, MOSEK_CALL, MosekEnv, SCIP_LPi::name, NULL, SCIP_LPi::prob, QS_ERROR, SCIP_Bool, SCIP_LPERROR, SCIP_MAXSTRLEN, SCIP_NOTIMPLEMENTED, SCIP_OKAY, SCIP_PLUGINNOTFOUND, SCIP_WRITEERROR, SCIPdebugMessage, SCIPerrorMessage, SCIPlpiGetNorms(), SCIPmessagePrintWarning(), SCIP_LPi::solver, SOPLEX_TRY, SCIP_LPi::spx, SCIP_LPi::task, TRUE, and SCIP_LPi::xprslp.

Referenced by SCIPlpiReadState(), SCIPlpiSolveDual(), and SCIPlpiSolvePrimal().

SCIPlpiGetNorms()

SCIP_RETCODE SCIPlpiGetNorms	(	SCIP_LPI *	lpi,
		BMS_BLKMEM *	blkmem,
		SCIP_LPINORMS **	lpinorms
	)

stores LPi pricing norms into lpinorms object

stores LPi pricing norms information

stores LPi pricing norms information

stores LPi pricing norms information

stores LPi pricing norms information

stores LPi pricing norms information

stores LPi pricing norms information

stores LPi pricing norms information

stores LPi pricing norms information

stores LPi pricing norms information

stores LPi pricing norms information

Parameters

lpi	LP interface structure
blkmem	block memory
lpinorms	pointer to LPi pricing norms information

Definition at line 3578 of file lpi_clp.cpp.

References BMSallocBlockMemory, BMSallocBlockMemoryArray, BMSfreeBlockMemory, BMSfreeBlockMemoryArray, CHECK_ZERO, SCIP_LPi::clearstate, SCIP_LPi::cpxenv, SCIP_LPi::cpxlp, errorMessage(), SCIP_LPi::grbmodel, SCIP_LPi::messagehdlr, MosekEnv, SCIP_LPi::ncols, SCIP_LPi::nrows, NULL, SCIP_LPi::prob, QS_CONDRET, SCIP_ALLOC, SCIP_OKAY, SCIP_PLUGINNOTFOUND, SCIPdebugMessage, SCIPlpiSetNorms(), SCIP_LPi::solisbasic, SCIP_LPi::solver, SCIP_LPi::spx, and SCIP_LPi::task.

Referenced by candidateStoreWarmStartInfo(), SCIPlpGetNorms(), and SCIPlpiWriteState().

SCIPlpiSetNorms()

SCIP_RETCODE SCIPlpiSetNorms	(	SCIP_LPI *	lpi,
		BMS_BLKMEM *	blkmem,
		const SCIP_LPINORMS *	lpinorms
	)

loads LPi pricing norms into solver; note that the LP might have been extended with additional columns and rows since the norms were stored with SCIPlpiGetNorms()

loads LPi pricing norms into solver; note that the LP might have been extended with additional columns and rows since the state was stored with SCIPlpiGetNorms()

Parameters

lpi	LP interface structure
blkmem	block memory
lpinorms	LPi pricing norms information, or NULL

Definition at line 3596 of file lpi_clp.cpp.

References CHECK_ZERO, SCIP_LPiNorms::colnorm, SCIP_LPi::cpxenv, SCIP_LPi::cpxlp, SCIP_LPiNorms::cstat, errorMessage(), SCIP_LPi::grbmodel, SCIP_LPi::messagehdlr, SCIP_LPi::ncols, SCIP_LPiNorms::ncols, SCIP_LPiNorms::normlen, SCIP_LPiNorms::norms, SCIP_LPi::nrows, SCIP_LPiNorms::nrows, NULL, SCIP_LPi::prob, QS_CONDRET, SCIP_LPiNorms::rownorm, SCIP_LPiNorms::rstat, SCIP_OKAY, SCIP_PLUGINNOTFOUND, SCIP_UNUSED, SCIPdebugMessage, SCIPlpiFreeNorms(), SCIPmessagePrintWarning(), SCIP_LPi::solver, and SCIP_LPi::spx.

Referenced by SCIPlpiGetNorms(), and SCIPlpSetNorms().

SCIPlpiFreeNorms()

SCIP_RETCODE SCIPlpiFreeNorms	(	SCIP_LPI *	lpi,
		BMS_BLKMEM *	blkmem,
		SCIP_LPINORMS **	lpinorms
	)

frees LPi pricing norms information

frees pricing norms information

Parameters

lpi	LP interface structure
blkmem	block memory
lpinorms	pointer to LPi pricing norms information, or NULL

Definition at line 3609 of file lpi_clp.cpp.

References BMSfreeBlockMemory, BMSfreeBlockMemoryArray, errorMessage(), NULL, SCIP_OKAY, SCIP_PLUGINNOTFOUND, SCIP_UNUSED, SCIPdebugMessage, SCIPlpiGetIntpar(), and SCIP_LPi::solver.

Referenced by SCIPlpFreeNorms(), SCIPlpiSetNorms(), and warmStartInfoFree().

SCIPlpiGetIntpar()

SCIP_EXPORT SCIP_RETCODE SCIPlpiGetIntpar	(	SCIP_LPI *	lpi,
		SCIP_LPPARAM	type,
		int *	ival
	)

gets integer parameter of LP

gets integer parameter of LP

CPLEX supported FASTMIP in versions up to 12.6.1. FASTMIP fastens the lp solving process but therefor it might happen that there will be a loss in precision (because e.g. the optimal basis will not be factorized again).

Parameters

lpi	LP interface structure
type	parameter number
ival	buffer to store the parameter value

Definition at line 3634 of file lpi_clp.cpp.

References CHECK_ZERO, SCIP_LPi::clp, CPX_INT_MAX, SCIP_LPi::cpxlp, FALSE, SCIP_LPi::fastmip, SCIP_LPi::from_scratch, SCIP_LPi::fromscratch, getDblParam(), getIntParam(), SCIP_LPi::grbmodel, SCIP_LPi::lp_info, SCIP_LPi::lpinfo, SCIP_LPi::messagehdlr, MOSEK_CALL, MosekEnv, SCIP_LPi::notfromscratch, NULL, SCIP_LPi::numthreads, SCIP_LPi::par_presolve, SCIP_LPi::parameters, paramty2str(), SCIP_LPi::pricing, SCIP_LPi::prob, QS_CONDRET, SCIP_LPi::rngfound, SCIP_CALL, SCIP_LPPAR_FASTMIP, SCIP_LPPAR_FROMSCRATCH, SCIP_LPPAR_LPINFO, SCIP_LPPAR_LPITLIM, SCIP_LPPAR_PRESOLVING, SCIP_LPPAR_PRICING, SCIP_LPPAR_RANDOMSEED, SCIP_LPPAR_REFACTOR, SCIP_LPPAR_SCALING, SCIP_LPPAR_THREADS, SCIP_LPPAR_TIMING, SCIP_OKAY, SCIP_PARAMETERUNKNOWN, SCIP_PARAMETERWRONGVAL, SCIP_Real, SCIPdebugMessage, SCIPlpiSetIntpar(), SCIP_LPi::spx, SCIP_LPi::startscratch, SCIP_LPi::task, SCIP_LPi::timing, TRUE, and SCIP_LPi::xprslp.

Referenced by lpCheckIntpar(), SCIPlpiFreeNorms(), and SCIPlpStartDive().

SCIPlpiSetIntpar()

SCIP_EXPORT SCIP_RETCODE SCIPlpiSetIntpar	(	SCIP_LPI *	lpi,
		SCIP_LPPARAM	type,
		int	ival
	)

sets integer parameter of LP

< mosek pricing for SCIP_PRICING_LPIDEFAULT

< mosek pricing for SCIP_PRICING_AUTO

< mosek pricing for SCIP_PRICING_FULL

< mosek pricing for SCIP_PRICING_PARTIAL

< mosek pricing for SCIP_PRICING_STEEP

< mosek pricing for SCIP_PRICING_STEEPQSTART

< mosek pricing for SCIP_PRICING_DEVEX

Parameters

lpi	LP interface structure
type	parameter number
ival	parameter value

Definition at line 3678 of file lpi_clp.cpp.

References CHECK_ZERO, SCIP_LPi::clp, CPX_INT_MAX, SCIP_LPi::cpxlp, FALSE, SCIP_LPi::from_scratch, SCIP_LPi::fromscratch, SCIP_LPi::grbmodel, SCIP_LPi::lp_info, SCIP_LPi::lpid, SCIP_LPi::lpinfo, SCIP_LPi::messagehdlr, MOSEK_CALL, MosekEnv, SCIP_LPi::notfromscratch, NULL, SCIP_LPi::numthreads, SCIP_LPi::par_presolve, SCIP_LPi::parameters, paramty2str(), SCIP_LPi::pricing, SCIP_LPi::prob, QS_CONDRET, SCIP_LPi::restrictselectdef, SCIP_LPi::rngfound, SCIP_Bool, SCIP_CALL, SCIP_INVALIDDATA, SCIP_LPERROR, SCIP_LPPAR_FASTMIP, SCIP_LPPAR_FROMSCRATCH, SCIP_LPPAR_LPINFO, SCIP_LPPAR_LPITLIM, SCIP_LPPAR_POLISHING, SCIP_LPPAR_PRESOLVING, SCIP_LPPAR_PRICING, SCIP_LPPAR_RANDOMSEED, SCIP_LPPAR_REFACTOR, SCIP_LPPAR_SCALING, SCIP_LPPAR_THREADS, SCIP_LPPAR_TIMING, SCIP_OKAY, SCIP_PARAMETERUNKNOWN, SCIP_PRICING_AUTO, SCIP_PRICING_DEVEX, SCIP_PRICING_FULL, SCIP_PRICING_LPIDEFAULT, SCIP_PRICING_PARTIAL, SCIP_PRICING_STEEP, SCIP_PRICING_STEEPQSTART, SCIPABORT, SCIPdebugMessage, SCIPerrorMessage, SCIPlpiGetRealpar(), setDblParam(), setFastmipClpParameters(), setIntParam(), SCIP_LPi::spx, SCIP_LPi::startscratch, SCIP_LPi::task, SCIP_LPi::timing, TRUE, unsetFastmipClpParameters(), and SCIP_LPi::xprslp.

Referenced by BENDERS_CUTORACLE(), checkAltLPInfeasible(), computeRelIntPoint(), conflictAnalyzeLP(), extendToCover(), initAlternativeLP(), lpSetIntpar(), runBoundHeuristic(), SCIP_DECL_CONSCHECK(), SCIPlpiAddRows(), SCIPlpiCreate(), SCIPlpiGetIntpar(), solveClassification(), and solveMinIISC().

SCIPlpiGetRealpar()

SCIP_EXPORT SCIP_RETCODE SCIPlpiGetRealpar	(	SCIP_LPI *	lpi,
		SCIP_LPPARAM	type,
		SCIP_Real *	dval
	)

gets floating point parameter of LP

Parameters

lpi	LP interface structure
type	parameter number
dval	buffer to store the parameter value

Definition at line 3782 of file lpi_clp.cpp.

References CHECK_ZERO, SCIP_LPi::clp, SCIP_LPi::conditionlimit, SCIP_LPi::cpxenv, SCIP_LPi::cpxlp, getDblParam(), SCIP_LPi::grbmodel, SCIP_LPi::linear_program, SCIP_LPi::messagehdlr, MOSEK_CALL, MosekEnv, NULL, SCIP_LPi::parameters, paramty2str(), SCIP_LPi::prob, QS_CONDRET, SCIP_LPi::rowrepswitch, SCIP_CALL, SCIP_LPPAR_BARRIERCONVTOL, SCIP_LPPAR_CONDITIONLIMIT, SCIP_LPPAR_DUALFEASTOL, SCIP_LPPAR_FEASTOL, SCIP_LPPAR_LPTILIM, SCIP_LPPAR_MARKOWITZ, SCIP_LPPAR_OBJLIM, SCIP_LPPAR_ROWREPSWITCH, SCIP_OKAY, SCIP_PARAMETERUNKNOWN, SCIPdebugMessage, SCIPlpiInfinity(), SCIPlpiSetRealpar(), SCIP_LPi::spx, SCIP_LPi::task, and SCIP_LPi::xprslp.

Referenced by conflictAnalyzeLP(), lpCheckRealpar(), lpSetBarrierconvtol(), lpSetDualfeastol(), lpSetFeastol(), lpSetObjlim(), and SCIPlpiSetIntpar().

SCIPlpiSetRealpar()

SCIP_EXPORT SCIP_RETCODE SCIPlpiSetRealpar	(	SCIP_LPI *	lpi,
		SCIP_LPPARAM	type,
		SCIP_Real	dval
	)

sets floating point parameter of LP

Parameters

lpi	LP interface structure
type	parameter number
dval	parameter value

Definition at line 3819 of file lpi_clp.cpp.

References CHECK_ZERO, SCIP_LPi::checkcondition, SCIP_LPi::clp, SCIP_LPi::conditionlimit, SCIP_LPi::cpxenv, SCIP_LPi::cpxlp, FALSE, SCIP_LPi::feastol, SCIP_LPi::grbmodel, SCIP_LPi::linear_program, SCIP_LPi::messagehdlr, MOSEK_CALL, MosekEnv, NULL, SCIP_LPi::parameters, paramty2str(), SCIP_LPi::prob, QS_CONDRET, SCIP_LPi::rowrepswitch, SCIP_CALL, SCIP_LPPAR_BARRIERCONVTOL, SCIP_LPPAR_CONDITIONLIMIT, SCIP_LPPAR_DUALFEASTOL, SCIP_LPPAR_FEASTOL, SCIP_LPPAR_LPTILIM, SCIP_LPPAR_MARKOWITZ, SCIP_LPPAR_OBJLIM, SCIP_LPPAR_ROWREPSWITCH, SCIP_OKAY, SCIP_PARAMETERUNKNOWN, SCIP_Real, SCIPdebugMessage, SCIPlpiInfinity(), setDblParam(), SCIP_LPi::spx, SCIP_LPi::task, TRUE, and SCIP_LPi::xprslp.

Referenced by computeRelIntPoint(), conflictAnalyzeLP(), lpSetRealpar(), runBoundHeuristic(), and SCIPlpiGetRealpar().

SCIPlpiInfinity()

SCIP_EXPORT SCIP_Real SCIPlpiInfinity

(

SCIP_LPI *

lpi

)

returns value treated as infinity in the LP solver

Parameters

lpi	LP interface structure

Definition at line 3893 of file lpi_clp.cpp.

References infinity, LPIINFINITY, MosekEnv, NULL, SCIP_Bool, SCIP_Real, SCIPdebugMessage, SCIPlpiIsInfinity(), SCIP_LPi::spx, and SCIP_LPi::task.

Referenced by addAltLPColumn(), addBdchg(), calcGrowSize(), computeRelIntPoint(), conflictAnalyzeLP(), createAltLPColumn(), lpAlgorithm(), lpFlushAddCols(), lpFlushAddRows(), lpFlushChgCols(), lpFlushChgRows(), lpSetObjlim(), lpSolve(), polyscip::Polyscip::printResults(), runBoundHeuristic(), SCIP_DECL_PARAMCHGD(), SCIPlpCreate(), SCIPlpiCreate(), SCIPlpiGetDualfarkas(), SCIPlpiGetObjval(), SCIPlpiGetRealpar(), SCIPlpiScaleCol(), SCIPlpiScaleRow(), SCIPlpiSetRealpar(), SCIPlpMarkFlushed(), SCIPlpSolveAndEval(), solveClassification(), solveMinIISC(), solveNodeLP(), unfixAltLPVariable(), unfixAltLPVariables(), and updateLazyBounds().

SCIPlpiIsInfinity()

SCIP_EXPORT SCIP_Bool SCIPlpiIsInfinity	(	SCIP_LPI *	lpi,
		SCIP_Real	val
	)

checks if given value is treated as infinity in the LP solver

Parameters

lpi	LP interface structure
val	value to be checked for infinity

Definition at line 3905 of file lpi_clp.cpp.

References FALSE, fileExists(), infinity, IS_POSINF, LPIINFINITY, MosekEnv, NULL, SCIP_Bool, SCIPdebugMessage, SCIP_LPi::spx, SCIP_LPi::task, and TRUE.

Referenced by addBdchg(), checkLPBoundsClean(), performStrongbranchWithPropagation(), SCIPlpiChgBounds(), SCIPlpiInfinity(), SCIPlpiScaleCol(), SCIPlpiScaleRow(), and SCIPlpiSetState().

SCIPlpiReadLP()

SCIP_EXPORT SCIP_RETCODE SCIPlpiReadLP	(	SCIP_LPI *	lpi,
		const char *	fname
	)

reads LP from a file

reads LP from a file

The file extension defines the format. That can be lp or mps. Any given file name needs to have one of these two extension. If not nothing is read and a SCIP_READERROR is returned.

Parameters

lpi	LP interface structure
fname	file name

Definition at line 3946 of file lpi_clp.cpp.

References BMSallocMemoryArray, BMSduplicateMemoryArray, BMSfreeMemoryArrayNull, CHECK_ZERO, SCIP_LPi::clp, SCIP_LPi::cpxenv, SCIP_LPi::cpxlp, errorMessage(), fileExists(), SCIP_LPi::grbenv, SCIP_LPi::grbmodel, SCIP_LPi::linear_program, SCIP_LPi::lpid, SCIP_LPi::messagehdlr, MOSEK_CALL, MosekEnv, NULL, SCIP_LPi::previt, SCIP_LPi::prob, SCIP_ALLOC, SCIP_NOFILE, SCIP_OKAY, SCIP_PLUGINNOTFOUND, SCIP_READERROR, SCIP_WRITEERROR, SCIPdebugMessage, SCIPerrorMessage, SCIPlpiWriteLP(), SCIPmessagePrintWarning(), SCIPsnprintf(), SCIPsplitFilename(), SCIP_LPi::solstat, SCIP_LPi::spx, SCIP_LPi::task, x, and SCIP_LPi::xprslp.

Referenced by fileExists().

SCIPlpiWriteLP()

SCIP_EXPORT SCIP_RETCODE SCIPlpiWriteLP	(	SCIP_LPI *	lpi,
		const char *	fname
	)

writes LP to a file

writes LP to a file

The file extension defines the format. That can be lp or mps. Any given file name needs to have one of these two extension. If not nothing is written and a SCIP_WRITEERROR is returned.

Parameters

lpi	LP interface structure
fname	file name

Definition at line 3975 of file lpi_clp.cpp.

References addRangeVars(), BMSallocMemoryArray, BMSduplicateMemoryArray, BMSfreeMemoryArrayNull, CHECK_ZERO, SCIP_LPi::clp, SCIP_LPi::cpxenv, SCIP_LPi::cpxlp, delRangeVars(), errorMessage(), SCIP_LPi::grbmodel, SCIP_LPi::linear_program, SCIP_LPi::lpid, SCIP_LPi::messagehdlr, MOSEK_CALL, MosekEnv, SCIP_LPi::nrngrows, NULL, SCIP_LPi::prob, SCIP_LPi::rngvarsadded, SCIP_ALLOC, SCIP_CALL, SCIP_OKAY, SCIP_PLUGINNOTFOUND, SCIP_READERROR, SCIP_WRITEERROR, SCIPdebugMessage, SCIPerrorMessage, SCIPmessagePrintWarning(), SCIPsnprintf(), SCIPsplitFilename(), SCIP_LPi::spx, SCIP_LPi::task, x, and SCIP_LPi::xprslp.

Referenced by addAltLPColumn(), computeRelIntPoint(), SCIP_DECL_PARAMCHGD(), SCIPlpiReadLP(), SCIPlpiSolveDual(), SCIPlpiSolvePrimal(), SCIPlpWrite(), solveClassification(), solveMinIISC(), and updateObjUpperbound().

lpiStrongbranch()

static SCIP_RETCODE lpiStrongbranch ( SCIP_LPI *  lpi, int  col, SCIP_Real  psol, int  itlim, SCIP_Real *  down, SCIP_Real *  up, SCIP_Bool *  downvalid, SCIP_Bool *  upvalid, int *  iter  )

static

performs strong branching iterations on one arbitrary candidate

Parameters

lpi	LP interface structure
col	column to apply strong branching on
psol	current primal solution value of column
itlim	iteration limit for strong branchings
down	stores dual bound after branching column down
up	stores dual bound after branching column up
downvalid	stores whether the returned down value is a valid dual bound; otherwise, it can only be used as an estimate value
upvalid	stores whether the returned up value is a valid dual bound; otherwise, it can only be used as an estimate value
iter	stores total number of strong branching iterations, or -1; may be NULL

Definition at line 2017 of file lpi_clp.cpp.

References BMSallocMemoryArray, BMSfreeMemoryArray, SCIP_LPi::clp, EPSCEIL, EPSFLOOR, SCIP_LPi::ncols, NULL, SCIP_ALLOC, SCIP_LPERROR, SCIP_OKAY, SCIPdebugMessage, TRUE, and SCIP_LPi::validFactorization.

Referenced by SCIPlpiStrongbranchFrac(), and SCIPlpiStrongbranchInt().

lpiStrongbranches()

static SCIP_RETCODE lpiStrongbranches ( SCIP_LPI *  lpi, int *  cols, int  ncols, SCIP_Real *  psols, int  itlim, SCIP_Real *  down, SCIP_Real *  up, SCIP_Bool *  downvalid, SCIP_Bool *  upvalid, int *  iter  )

static

performs strong branching iterations on given arbitrary candidates

Parameters

lpi	LP interface structure
cols	columns to apply strong branching on
ncols	number of columns
psols	fractional current primal solution values of columns
itlim	iteration limit for strong branchings
down	stores dual bounds after branching columns down
up	stores dual bounds after branching columns up
downvalid	stores whether the returned down values are valid dual bounds; otherwise, they can only be used as an estimate values
upvalid	stores whether the returned up values are a valid dual bounds; otherwise, they can only be used as an estimate values
iter	stores total number of strong branching iterations, or -1; may be NULL

Definition at line 2137 of file lpi_clp.cpp.

References BMSallocMemoryArray, BMSfreeMemoryArray, SCIP_LPi::clp, EPSCEIL, EPSFLOOR, SCIP_LPi::ncols, NULL, SCIP_ALLOC, SCIP_LPERROR, SCIP_OKAY, SCIPdebugMessage, TRUE, and SCIP_LPi::validFactorization.

Referenced by SCIPlpiStrongbranchesFrac(), and SCIPlpiStrongbranchesInt().

lpiStrongbranchIntegral()

static SCIP_RETCODE lpiStrongbranchIntegral ( SCIP_LPI *  lpi, int  col, SCIP_Real  psol, int  itlim, SCIP_Real *  down, SCIP_Real *  up, SCIP_Bool *  downvalid, SCIP_Bool *  upvalid, int *  iter  )

static

manually performs strong branching on one integral variable

Parameters

lpi	LP interface structure
col	column to apply strong branching on
psol	current integral primal solution value of column
itlim	iteration limit for strong branchings
down	stores dual bound after branching column down
up	stores dual bound after branching column up
downvalid	stores whether the returned down value is a valid dual bound; otherwise, it can only be used as an estimate value
upvalid	stores whether the returned up value is a valid dual bound; otherwise, it can only be used as an estimate value
iter	stores total number of strong branching iterations, or -1; may be NULL

Definition at line 2633 of file lpi_cpx.c.

References CHECK_ZERO, CPX_INT_MAX, SCIP_LPi::cpxenv, SCIP_LPi::cpxlp, EPSCEIL, EPSFLOOR, EPSISINT, SCIP_LPi::feastol, getBase(), getDblParam(), getIntParam(), SCIP_LPi::messagehdlr, NULL, SCIP_CALL, SCIP_OKAY, SCIP_Real, SCIPdebugMessage, SCIPlpiGetIterations(), SCIPlpiGetObjval(), SCIPlpiIsIterlimExc(), SCIPlpiIsObjlimExc(), SCIPlpiIsOptimal(), SCIPlpiIsPrimalInfeasible(), SCIPlpiSolveDual(), setBase(), setIntParam(), and TRUE.

Referenced by SCIPlpiStrongbranchesInt(), and SCIPlpiStrongbranchInt().

deleteRowsAndUpdateCurrentBasis()

static void deleteRowsAndUpdateCurrentBasis ( SCIP_LPI *  lpi, const DenseBooleanColumn &  rows_to_delete  )

static

delete rows from LP and update the current basis

Parameters

lpi	LP interface structure
rows_to_delete	array to mark rows that should be deleted

Definition at line 535 of file lpi_glop.cpp.

References SCIP_LPi::linear_program, SCIP_LPi::lp_modified_since_last_solve, and SCIP_LPi::solver.

Referenced by SCIPlpiDelRows(), and SCIPlpiDelRowset().

getASlice()

static SCIP_RETCODE getASlice ( SCIP_LPI *  lpi, SCIP_Bool  iscon, int  first, int  last, int *  nnonz, int *  beg, int *  ind, double *  val  )

static

get a slice of a row or column

Parameters

lpi	LP interface structure
iscon	whether we are requesting a slice of a constraint or column
first	first index
last	last index
nnonz	pointer to store the number of nonzeros
beg	array for begins of indices/values
ind	array of row/column indices
val	array of values

Definition at line 1761 of file lpi_msk.c.

References SCIP_LPi::aptre, ensureAptreMem(), SCIP_LPi::lpid, MOSEK_CALL, MosekEnv, NULL, SCIP_CALL, SCIP_OKAY, SCIPdebugMessage, and SCIP_LPi::task.

Referenced by SCIPlpiGetCols(), and SCIPlpiGetRows().

getSolutionStatus()

static SCIP_RETCODE getSolutionStatus ( SCIP_LPI *  lpi, MSKprostae *  prosta, MSKsolstae *  solsta  )

static

gets the internal solution status of the solver

Parameters

lpi	LP interface structure
prosta	pointer to store the problem status
solsta	pointer to store the solution status

Definition at line 2095 of file lpi_msk.c.

References SCIP_LPi::lastsolvetype, MOSEK_CALL, MosekEnv, MSK_getsolutionstatus(), NULL, SCIP_OKAY, and SCIP_LPi::task.

Referenced by SCIPlpiExistsDualRay(), SCIPlpiExistsPrimalRay(), SCIPlpiGetInternalStatus(), SCIPlpiHasDualRay(), SCIPlpiHasPrimalRay(), SCIPlpiIsDualFeasible(), SCIPlpiIsOptimal(), SCIPlpiIsPrimalFeasible(), and SCIPlpiIsPrimalUnbounded().

filterTRMrescode()

static MSKrescodee filterTRMrescode ( SCIP_MESSAGEHDLR *  messagehdlr, MSKrescodee *  termcode, MSKrescodee  res  )

static

helper method to filter out numerical problems

Parameters

messagehdlr	message handler
termcode	pointer to store output termination code
res	input result of call to Mosek function

Definition at line 2112 of file lpi_msk.c.

References NULL, optimizecount, SCIP_UNUSED, and SCIPmessagePrintWarning().

Referenced by SCIPlpiSolveBarrier(), and SolveWSimplex().

SolveWSimplex()

static SCIP_RETCODE SolveWSimplex ( SCIP_LPI *  lpi )

static

solve problem with the simplex algorithm

Parameters

lpi	LP interface structure

Definition at line 2146 of file lpi_msk.c.

References bound, fabs(), filterTRMrescode(), invalidateSolution(), SCIP_LPi::itercount, SCIP_LPi::lastsolvetype, SCIP_LPi::lpinfo, MAX, SCIP_LPi::messagehdlr, MOSEK_CALL, MosekEnv, MSK_getsolutionstatus(), NULL, optimizecount, presolve(), SCIP_LPi::restrictselectdef, SCIP_CALL, SCIP_LPERROR, SCIP_OKAY, SCIPdebugMessage, SCIPdebugPrintf, SCIPerrorMessage, SCIPlpiSolveBarrier(), SCIPmessagePrintWarning(), scipmskobjsen, SCIP_LPi::solved, SCIP_LPi::task, SCIP_LPi::termcode, and TRUE.

Referenced by SCIPlpiGetSol(), SCIPlpiSolveDual(), and SCIPlpiSolvePrimal().

SCIPlpiStrongbranch()

static SCIP_RETCODE SCIPlpiStrongbranch ( SCIP_LPI *  lpi, int  col, SCIP_Real  psol, int  itlim, SCIP_Real *  down, SCIP_Real *  up, SCIP_Bool *  downvalid, SCIP_Bool *  upvalid, int *  iter  )

static

performs strong branching iterations on all candidates

Note

last solve call must have been either simplex or barrier with crossover or base must have been set manually

Parameters

lpi	LP interface structure
col	column to apply strong branching on
psol	current primal solution value of column
itlim	iteration limit for strong branchings
down	stores dual bound after branching column down
up	stores dual bound after branching column up
downvalid	stores whether the returned down value is a valid dual bound; otherwise, it can only be used as an estimate value
upvalid	stores whether the returned up value is a valid dual bound; otherwise, it can only be used as an estimate value
iter	stores total number of strong branching iterations, or -1; may be NULL

Definition at line 2830 of file lpi_msk.c.

References SCIP_LPi::bkx, bound, EPSCEIL, EPSEQ, EPSFLOOR, FALSE, getbase(), invalidateSolution(), IS_NEGINF, IS_POSINF, SCIP_LPi::itercount, SCIP_LPi::lastsolvetype, SCIP_LPi::lpid, SCIP_LPi::messagehdlr, MOSEK_CALL, MosekEnv, SCIP_LPi::ncols, SCIP_LPi::nrows, NULL, optimizecount, SCIP_Bool, SCIP_CALL, SCIP_OKAY, SCIPdebugMessage, SCIPlpiExistsDualRay(), SCIPlpiExistsPrimalRay(), SCIPlpiGetSolFeasibility(), SCIPlpiIsStable(), SCIPlpiSolveDual(), SCIPmessagePrintWarning(), setbase(), STRONGBRANCH_PRICING, SCIP_LPi::task, SCIP_LPi::termcode, and TRUE.

Referenced by SCIPlpiStrongbranchesFrac(), SCIPlpiStrongbranchesInt(), SCIPlpiStrongbranchFrac(), and SCIPlpiStrongbranchInt().

handle_singular()

static SCIP_RETCODE handle_singular ( SCIP_LPI *  lpi, int *  basis, MSKrescodee  res  )

static

handle singular basis

Parameters

lpi	LP interface structure
basis	array of basis indices
res	result

Definition at line 3786 of file lpi_msk.c.

References MOSEK_CALL, SCIP_CALL, SCIP_OKAY, SCIPlpiSolvePrimal(), and SCIP_LPi::task.

Referenced by SCIPlpiGetBasisInd(), SCIPlpiGetBInvACol(), SCIPlpiGetBInvCol(), and SCIPlpiGetBInvRow().

convertstat_mosek2scip()

static SCIP_RETCODE convertstat_mosek2scip ( SCIP_LPI *  lpi, SCIP_Bool  iscon, MSKstakeye *  sk, int  n, int *  stat  )

static

convert Mosek basis status to SCIP basis status

Note

last solve call must have been either simplex or barrier with crossover or base must have been set manually

Parameters

lpi	LP interface structure
iscon	whether constraints/variables are considered
sk	status array of Mosek
n	size
stat	status array of SCIP

Definition at line 3816 of file lpi_msk.c.

References SCIP_LPi::lastsolvetype, MOSEK_CALL, NULL, SCIP_BASESTAT_BASIC, SCIP_BASESTAT_LOWER, SCIP_BASESTAT_UPPER, SCIP_BASESTAT_ZERO, SCIP_INVALIDDATA, SCIP_OKAY, SCIPABORT, and SCIP_LPi::task.

Referenced by lpistatePack(), and SCIPlpiGetBase().

convertstat_mosek2scip_slack()

static SCIP_RETCODE convertstat_mosek2scip_slack ( SCIP_LPI *  lpi, SCIP_Bool  iscon, MSKstakeye *  sk, int  m, int *  stat  )

static

convert Mosek to SCIP basis status - slack variables

Note

last solve call must have been either simplex or barrier with crossover or base must have been set manually

Parameters

lpi	LP interface structure
iscon	whether constraints or variables are accessed
sk	Mosek basis status
m	size
stat	status array

Definition at line 3890 of file lpi_msk.c.

References SCIP_LPi::lastsolvetype, MOSEK_CALL, NULL, SCIP_BASESTAT_BASIC, SCIP_BASESTAT_LOWER, SCIP_BASESTAT_UPPER, SCIP_BASESTAT_ZERO, SCIP_INVALIDDATA, SCIP_OKAY, SCIPABORT, and SCIP_LPi::task.

Referenced by lpistatePack(), and SCIPlpiGetBase().

convertstat_scip2mosek()

static void convertstat_scip2mosek ( const int *  stat, int  n, MSKstakeye *  resstat  )

static

convert SCIP to Mosek basis status

Parameters

stat	SCIP status array
n	size of array
resstat	resulting Mosek status array

Definition at line 3955 of file lpi_msk.c.

References SCIP_BASESTAT_BASIC, SCIP_BASESTAT_LOWER, SCIP_BASESTAT_UPPER, SCIP_BASESTAT_ZERO, and SCIPABORT.

Referenced by lpistateUnpack(), and SCIPlpiSetBase().

convertstat_scip2mosek_slack()

static void convertstat_scip2mosek_slack ( const int *  stat, int  n, MSKstakeye *  resstat  )

static

convert SCIP to Mosek basis status - slack variables

Parameters

stat	SCIP status array
n	size of array
resstat	resulting Mosek status array

Definition at line 3986 of file lpi_msk.c.

References SCIP_BASESTAT_BASIC, SCIP_BASESTAT_LOWER, SCIP_BASESTAT_UPPER, SCIP_BASESTAT_ZERO, and SCIPABORT.

Referenced by lpistateUnpack(), and SCIPlpiSetBase().

lpistateCreate()

static SCIP_RETCODE lpistateCreate ( SCIP_LPISTATE **  lpistate, BMS_BLKMEM *  blkmem, int  ncols, int  nrows  )

static

creates LPi state information object

Parameters

lpistate	pointer to LPi state
blkmem	block memory
ncols	number of columns to store
nrows	number of rows to store

Definition at line 4444 of file lpi_msk.c.

References BMSallocBlockMemory, BMSallocBlockMemoryArray, colpacketNum(), SCIP_LPi::ncols, SCIP_LPi::nrows, NULL, rowpacketNum(), SCIP_ALLOC, and SCIP_OKAY.

Referenced by SCIPlpiGetState().

lpistateFree()

static void lpistateFree ( SCIP_LPISTATE **  lpistate, BMS_BLKMEM *  blkmem  )

static

frees LPi state information

Parameters

lpistate	pointer to LPi state information (like basis information)
blkmem	block memory

Definition at line 4470 of file lpi_msk.c.

References BMSfreeBlockMemory, BMSfreeBlockMemoryArray, colpacketNum(), NULL, and rowpacketNum().

Referenced by SCIPlpiFreeState().

checkState1()

static SCIP_RETCODE checkState1 ( SCIP_LPI *  lpi, int  n, MSKstakeye *  sk, SCIP_Bool  isrow  )

static

check state

Note

last solve call must have been either simplex or barrier with crossover or base must have been set manually

Parameters

lpi	LP interface structure
n	number of rows or columns
sk	basis status
isrow	whether rows/columns are considered

Definition at line 4490 of file lpi_msk.c.

References DEBUG_CHECK_STATE_TOL, fabs(), SCIP_LPi::lastsolvetype, MOSEK_CALL, NULL, optimizecount, SCIP_OKAY, SCIPdebugMessage, and SCIP_LPi::task.

Referenced by checkState().

checkState()

static SCIP_RETCODE checkState ( SCIP_LPI *  lpi, int  ncols, int  nrows  )

static

check state

Note

last solve call must have been either simplex or barrier with crossover or base must have been set manually

Parameters

lpi	LP interface structure
ncols	number of columns
nrows	number of rows

Definition at line 4565 of file lpi_msk.c.

References checkState1(), FALSE, SCIP_LPi::lastsolvetype, NULL, SCIP_CALL, SCIP_OKAY, SCIP_LPi::skc, SCIP_LPi::skx, and TRUE.

Referenced by SCIPlpiGetState().

lpistatePack()

static SCIP_RETCODE lpistatePack ( SCIP_LPI *  lpi, SCIP_LPISTATE *  lpistate  )

static

store row and column basis status in a packed LPi state object

Note

last solve call must have been either simplex or barrier with crossover or base must have been set manually

Parameters

lpi	LP interface structure
lpistate	pointer to LPi state data

Definition at line 4586 of file lpi_msk.c.

References convertstat_mosek2scip(), convertstat_mosek2scip_slack(), FALSE, SCIP_LPi::lastsolvetype, SCIP_LPiState::ncols, SCIP_LPiState::nrows, NULL, SCIP_CALL, SCIP_OKAY, SCIPencodeDualBit(), SCIP_LPi::skc, SCIP_LPiState::skc, SCIP_LPi::skx, SCIP_LPiState::skx, and TRUE.

Referenced by SCIPlpiGetState().

lpistateUnpack()

static void lpistateUnpack ( const SCIP_LPISTATE *  lpistate, MSKstakeye *  skx, MSKstakeye *  skc  )

static

unpacks row and column basis status from a packed LPi state object

Parameters

lpistate	pointer to LPi state data
skx	basis status for columns
skc	basis status for rows

Definition at line 4610 of file lpi_msk.c.

References convertstat_scip2mosek(), convertstat_scip2mosek_slack(), SCIP_LPiState::ncols, SCIP_LPiState::nrows, SCIPdecodeDualBit(), SCIP_LPiState::skc, and SCIP_LPiState::skx.

Referenced by SCIPlpiSetState().