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SCIP Doxygen Documentation: SCIP

methods to manipulate a SCIP object

◆ SCIPcreate()

creates and initializes SCIP data structures

Note: The SCIP default message handler is installed. Use the method SCIPsetMessagehdlr() to install your own message handler or SCIPsetMessagehdlrLogfile() and SCIPsetMessagehdlrQuiet() to write into a log file and turn off/on the display output, respectively.

Returns: SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See SCIP_RETCODE for a complete list of error codes.

Postcondition: After calling this method scip reached the solving stage SCIP_STAGE_INIT

See SCIP_STAGE for a complete list of all possible solving stages.

creates and initializes SCIP data structures

Note: The SCIP default message handler is installed. Use the method SCIPsetMessagehdlr() to install your own message handler or SCIPsetMessagehdlrLogfile() and SCIPsetMessagehdlrQuiet() to write into a log file and turn off/on the display output, respectively.

Returns: SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See SCIP_RETCODE for a complete list of error codes.

Postcondition: After calling this method SCIP reached the solving stage SCIP_STAGE_INIT

See SCIP_STAGE for a complete list of all possible solving stages.

Parameters: scip pointer to SCIP data structure

Definition at line 317 of file scip_general.c.

References doScipCreate(), NULL, SCIP_CALL_FINALLY, SCIP_OKAY, and SCIPfree().

Referenced by addScenarioVarsAndConsToProb(), applyCompletesol(), applyOfins(), applyRepair(), applyVbounds(), createSubscip(), createSubSCIP(), doPricing(), execmain(), executeLNSHeuristic(), initConcsolver(), main(), scipexamples::QueensSolver::QueensSolver(), reoptimize(), runBrachistochrone(), runGastrans(), runPacking(), runSCIP(), runShell(), runSpring(), SCIP_DECL_BENDERSCOPY(), SCIP_DECL_HEUREXEC(), SCIP_DECL_RELAXEXEC(), SCIP_DECL_SEPAEXECLP(), SCIP_DECL_SOLVECUMULATIVE(), SCIPapplyProximity(), SCIPapplyRedSize(), SCIPapplyUndercover(), SCIPapplyZeroobj(), SCIPbendersApplyDecomposition(), SCIPcomputeCoverUndercover(), SCIPcreateFiniteSolCopy(), SCIPprobdataCreate(), SCIPrunColoringShell(), SCIPrunCyc(), SCIPrunShell(), SCIPverifyCircularPatternNLP(), searchEcAggr(), setupProbingSCIP(), solveClassification(), solveMinIISC(), solvePricingMINLP(), solveSubMIP(), solveSubproblem(), and writeBounds().

◆ SCIPfree()

frees SCIP data structures

Returns: SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See SCIP_RETCODE for a complete list of error codes.

Precondition

This method can be called if scip is in one of the following stages:

Postcondition: After calling this method SCIP reached the solving stage SCIP_STAGE_FREE

See SCIP_STAGE for a complete list of all possible solving stages.

Parameters: scip pointer to SCIP data structure

Definition at line 349 of file scip_general.c.

References BMSfreeMemory, FALSE, NULL, SCIP_CALL, SCIP_OKAY, SCIP_STAGE_FREE, SCIP_STAGE_INIT, SCIPcheckStage(), SCIPclockFree(), SCIPdialoghdlrFree(), SCIPfreeProb(), SCIPinterruptFree(), SCIPmemFree(), SCIPmessagehdlrRelease(), SCIPsetFree(), SCIPsyncstoreRelease(), and TRUE.

Referenced by applyCompletesol(), applyOfins(), applyRepair(), applyVbounds(), blockCreateSubscip(), componentCreateSubscip(), createSubscip(), createSubSCIP(), deleteSubproblem(), doPricing(), execmain(), executeLNSHeuristic(), freeBlock(), freeComponent(), freeScenarioTree(), freeSubSCIP(), freeSubscip(), main(), probdataFree(), reoptimize(), runBrachistochrone(), runGastrans(), runPacking(), runSCIP(), runShell(), runSpring(), SCIP_DECL_BENDERSFREE(), SCIP_DECL_CONCSOLVERDESTROYINST(), SCIP_DECL_CONSPRESOL(), SCIP_DECL_HEUREXEC(), SCIP_DECL_RELAXEXEC(), SCIP_DECL_SEPAEXECLP(), SCIP_DECL_SOLVECUMULATIVE(), SCIPapplyRedSize(), SCIPapplyUndercover(), SCIPapplyZeroobj(), SCIPbendersDeactivate(), SCIPcomputeCoverUndercover(), SCIPcreate(), SCIPcreateFiniteSolCopy(), SCIPrunColoringShell(), SCIPrunCyc(), SCIPrunShell(), SCIPverifyCircularPatternNLP(), searchEcAggr(), solveClassification(), solveComponent(), solveMinIISC(), solvePricingMINLP(), solveSubMIP(), solveSubproblem(), subscipdataFreeSubscip(), writeBounds(), and scipexamples::QueensSolver::~QueensSolver().

◆ SCIPgetStage()

returns current stage of SCIP

Returns: the current SCIP stage

See SCIP_STAGE for a complete list of all possible solving stages.

Parameters

Definition at line 390 of file scip_general.c.

References NULL.

Referenced by addCoef(), addOrbitope(), analyzeConflict(), analyzeConflictLowerbound(), analyzeConflictOne(), analyzeConflictRangedRow(), analyzeConflictUpperbound(), analyzeConflictZero(), applyGenVBound(), applyProbing(), applyRepair(), branchruledataEnsureArraySize(), canonicalizeConstraints(), catchEvent(), checkEstimateCriterion(), checkLocksAndRes(), checkTransferBoolParam(), collectEstLst(), componentSetupWorkingSol(), consdataCreate(), consdataSort(), constructCompression(), constructValidSolution(), createAuxVar(), createCGCuts(), createCons(), createConsSetppc(), createSubproblems(), createSubscip(), createSubSCIP(), deinitSolve(), delCoefPos(), detectNlhdlr(), detectNlhdlrs(), displayRelevantStats(), doCopy(), executeHeuristic(), freeComponent(), generateAndApplyBendersCuts(), generateAndApplyBendersIntegerCuts(), generateAndApplyBendersNogoodCut(), getNNodesBelowIncumbent(), getNRank1Nodes(), getX(), heurdataEnsureArraySize(), initialiseSubproblem(), initPricing(), initSolve(), orbitalReductionPropagateComponent(), performDualfix(), processBinvarFixings(), propagateCons(), propagatePackingPartitioningCons(), propagateVbounds(), propIndicator(), proposeFeasibleSolution(), readDecomposition(), readDiffFile(), readSolFile(), readXmlSolFile(), recomputeNodeInformation(), removeFixedBinvars(), removeVariablesAndConstraintsFromMaster(), resolvePropagationCoretimes(), SCIP_DECL_BENDERSCUTEXEC(), SCIP_DECL_CONSACTIVE(), SCIP_DECL_CONSCHECK(), SCIP_DECL_CONSDEACTIVE(), SCIP_DECL_CONSDELETE(), SCIP_DECL_CONSDISABLE(), SCIP_DECL_CONSENABLE(), SCIP_DECL_CONSPRESOL(), SCIP_DECL_CONSPROP(), SCIP_DECL_CONSTRANS(), SCIP_DECL_DIALOGEXEC(), SCIP_DECL_EVENTEXEC(), SCIP_DECL_EVENTFREE(), SCIP_DECL_HEUREXEC(), SCIP_DECL_NLHDLRDETECT(), SCIP_DECL_PARAMCHGD(), SCIP_DECL_PRESOLEXEC(), SCIP_DECL_PROPEXEC(), SCIP_DECL_PROPPRESOL(), SCIP_DECL_READERREAD(), SCIPaddCoefLinear(), SCIPaddExprNonlinear(), SCIPaddLinearVarNonlinear(), SCIPanalyzeDeductionsProbing(), SCIPapplyHeurSubNlp(), SCIPbendersExec(), SCIPbendersFreeSubproblem(), SCIPbendersSolveSubproblemCIP(), SCIPcheckBendersSubproblemOptimality(), SCIPchgCapacityKnapsack(), SCIPchgCoefLinear(), SCIPchgConsName(), SCIPchgExprNonlinear(), SCIPchgLhsNonlinear(), SCIPchgRhsNonlinear(), SCIPchgVarLb(), SCIPchgVarLbGlobal(), SCIPchgVarLbNode(), SCIPchgVarLbProbing(), SCIPchgVarName(), SCIPchgVarType(), SCIPchgVarUb(), SCIPchgVarUbGlobal(), SCIPchgVarUbNode(), SCIPchgVarUbProbing(), SCIPclassifyConstraintTypesLinear(), SCIPcomputeFacetVertexPolyhedralNonlinear(), SCIPcreateConsCardinality(), SCIPcreateConsCumulative(), SCIPcreateConsLinear(), SCIPcreateConsLinking(), SCIPcreateConsLogicor(), SCIPcreateConsOptcumulative(), SCIPcreateConsSOS1(), SCIPgenerateAndApplyBendersOptCut(), SCIPgetNLimSolsFound(), SCIPgetVarCopy(), SCIPincludeNlhdlrNonlinear(), SCIPinferVarFixCons(), SCIPinferVarFixProp(), SCIPinferVarLbProp(), SCIPinferVarUbProp(), SCIPisConsCompressionEnabled(), SCIPisDualSolAvailable(), SCIPmakeIndicatorFeasible(), SCIPmakeIndicatorsFeasible(), SCIPmergeVariableStatistics(), SCIPprintSolutionStatistics(), SCIPprintStatistics(), SCIPprintTimingStatistics(), SCIPsetLinearConsIndicator(), SCIPsetSlackVarUb(), SCIPsolveConcurrent(), SCIPtightenVarLb(), SCIPtightenVarLbGlobal(), SCIPtightenVarUb(), SCIPtightenVarUbGlobal(), SCIPtransformDecompstore(), SCIPtransformMinUC(), SCIPupdateStartpointHeurSubNlp(), SCIPvalidateSolve(), SCIPwriteSolutionNl(), setupAndSolve(), setupAndSolveSubscipRapidlearning(), solveComponent(), solveSubNLP(), subtreeSumGapUpdate(), tightenBounds(), tightenedLinkvar(), and updateDataStructures().

◆ SCIPprintStage()

outputs SCIP stage and solution status if applicable via the message handler

Note: If the message handler is set to a NULL pointer nothing will be printed; If limits have been changed between the solution and the call to this function, the status is recomputed and thus may to correspond to the original status.

Returns: SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See SCIP_RETCODE for a complete list of error codes.

See SCIP_STAGE for a complete list of all possible solving stages.

Parameters: scip SCIP data structure file output file (or NULL for standard output)

Definition at line 412 of file scip_general.c.

References SCIP_CALL, SCIP_INVALIDDATA, SCIP_OKAY, SCIP_Real, SCIP_STAGE_EXITPRESOLVE, SCIP_STAGE_EXITSOLVE, SCIP_STAGE_FREE, SCIP_STAGE_FREETRANS, SCIP_STAGE_INIT, SCIP_STAGE_INITPRESOLVE, SCIP_STAGE_INITSOLVE, SCIP_STAGE_PRESOLVED, SCIP_STAGE_PRESOLVING, SCIP_STAGE_PROBLEM, SCIP_STAGE_SOLVED, SCIP_STAGE_SOLVING, SCIP_STAGE_TRANSFORMED, SCIP_STAGE_TRANSFORMING, SCIPcheckStage(), SCIPerrorMessage, SCIPgetObjsense(), SCIPgetPrimalbound(), SCIPisInfinity(), SCIPmessageFPrintInfo(), SCIPprintStatus(), SCIPsolveIsStopped(), and TRUE.

Referenced by displayRelevantStats(), and SCIPprintStatusStatistics().

◆ SCIPgetStatus()

gets solution status

Returns: SCIP solution status

See SCIP_STATUS for a complete list of all possible solving status.

Parameters

Definition at line 508 of file scip_general.c.

References NULL, SCIP_CALL_ABORT, SCIP_STAGE_FREE, SCIP_STAGE_INIT, SCIP_STATUS_UNKNOWN, SCIPcheckStage(), and TRUE.

Referenced by createSubSCIP(), doPricing(), executeLNSHeuristic(), main(), reoptimize(), runBenders(), SCIP_DECL_BENDERSCUTEXEC(), SCIP_DECL_CONCSOLVERSYNCWRITE(), SCIP_DECL_CONSEXITPRE(), SCIP_DECL_CONSINITPRE(), SCIP_DECL_CONSINITSOL(), SCIP_DECL_DISPOUTPUT(), SCIP_DECL_EVENTEXEC(), SCIP_DECL_HEUREXEC(), SCIP_DECL_PROPEXITPRE(), SCIP_DECL_RELAXEXEC(), SCIPapplyHeurDualval(), SCIPbendersComputeSubproblemLowerbound(), SCIPbendersSolveSubproblemCIP(), SCIPgetGap(), SCIPgetLowerbound(), SCIPgetTransGap(), SCIPgetUpperbound(), SCIPprintSolutionStatistics(), SCIPprintStatus(), SCIPsolveConcurrent(), SCIPverifyCircularPatternNLP(), SCIPwriteSolutionNl(), searchEcAggrWithMIP(), setupAndSolve(), setupAndSolveCumulativeSubscip(), setupAndSolveSubscip(), setupAndSolveSubscipLocalbranching(), setupAndSolveSubscipRapidlearning(), setupAndSolveSubscipTrustregion(), solveAndEvalSubscip(), solveComponent(), solvePricingMINLP(), solveSubNLP(), solveSubproblem(), solveSubscip(), solveSubscipLpface(), storeAggrFromMIP(), and writeBounds().

◆ SCIPprintStatus()

outputs solution status

Returns: SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See SCIP_RETCODE for a complete list of error codes.

See SCIP_STATUS for a complete list of all possible solving status.

Parameters: scip SCIP data structure file output file (or NULL for standard output)

Definition at line 531 of file scip_general.c.

References SCIP_CALL, SCIP_INVALIDDATA, SCIP_OKAY, SCIP_STATUS_BESTSOLLIMIT, SCIP_STATUS_DUALLIMIT, SCIP_STATUS_GAPLIMIT, SCIP_STATUS_INFEASIBLE, SCIP_STATUS_INFORUNBD, SCIP_STATUS_MEMLIMIT, SCIP_STATUS_NODELIMIT, SCIP_STATUS_OPTIMAL, SCIP_STATUS_PRIMALLIMIT, SCIP_STATUS_RESTARTLIMIT, SCIP_STATUS_SOLLIMIT, SCIP_STATUS_STALLNODELIMIT, SCIP_STATUS_TERMINATE, SCIP_STATUS_TIMELIMIT, SCIP_STATUS_TOTALNODELIMIT, SCIP_STATUS_UNBOUNDED, SCIP_STATUS_UNKNOWN, SCIP_STATUS_USERINTERRUPT, SCIPcheckStage(), SCIPerrorMessage, SCIPgetStatus(), SCIPmessageFPrintInfo(), and TRUE.

Referenced by SCIP_DECL_CONCSOLVEREXEC(), SCIP_DECL_DIALOGEXEC(), SCIPprintStage(), and SCIPwriteSolutionNl().

◆ SCIPisTransformed()

returns whether the current stage belongs to the transformed problem space

Returns: Returns TRUE if the SCIP instance is transformed, otherwise FALSE

Parameters

Definition at line 606 of file scip_general.c.

References NULL, and SCIP_STAGE_TRANSFORMING.

Referenced by addSymmetryInformation(), consdataAddCons(), consdataCreate(), consdataCreateBinvars(), consdataCreateRedundant(), consdataCreateSuperindicator(), consdataFree(), copyProb(), createAndAddAndCons(), createConsSetppc(), freeComponent(), freeOrbitope(), getMaxactImplicObjchg(), lexdataCreate(), readMst(), readSol(), readSolFile(), readXmlSolFile(), SCIP_DECL_CONSCOPY(), SCIP_DECL_CONSDELETE(), SCIP_DECL_CONSGETPERMSYMGRAPH(), SCIP_DECL_CONSGETSIGNEDPERMSYMGRAPH(), SCIP_DECL_CONSPROP(), SCIP_DECL_CONSTRANS(), SCIP_DECL_DIALOGEXEC(), SCIP_DECL_EVENTEXITSOL(), SCIP_DECL_EVENTINITSOL(), SCIPapplyHeurDualval(), SCIPapplyHeurSubNlp(), SCIPchgVarBranchPriority(), SCIPcreateConsAnd(), SCIPcreateConsIndicatorGeneric(), SCIPcreateConsIndicatorGenericLinCons(), SCIPcreateConsIndicatorGenericLinConsPure(), SCIPcreateConsKnapsack(), SCIPcreateConsLogicor(), SCIPcreateConsVarbound(), SCIPlexicographicReductionAddPermutation(), SCIPorbitalReductionAddComponent(), SCIPorbitopalReductionAddOrbitope(), SCIPpermuteProb(), SCIPprintSol(), setSetppcType(), solveSubNLP(), and updateRunStats().

◆ SCIPisExactSolve()

returns whether the solution process is arithmetically exact, i.e., not subject to roundoff errors

Note: This feature is not supported yet!

Returns: Returns TRUE if SCIP is exact solving mode, otherwise FALSE

returns whether the solution process should be probably correct

Note: This feature is not supported yet!

Returns: Returns TRUE if SCIP is exact solving mode, otherwise FALSE

Parameters

Definition at line 621 of file scip_general.c.

References NULL.

Referenced by branch(), branchOnVar(), execRelpscost(), runVanillaStrongBranching(), SCIP_DECL_BRANCHEXECLP(), SCIP_DECL_PROPEXEC(), SCIPselectVarPseudoStrongBranching(), SCIPselectVarStrongBranching(), and selectVarMultAggrBranching().

◆ SCIPisPresolveFinished()

returns whether the presolving process would be finished given no more presolving reductions are found in this presolving round

Checks whether the number of presolving rounds is not exceeded and the presolving reductions found in the current presolving round suffice to trigger another presolving round.

Note: if subsequent presolvers find more reductions, presolving might continue even if the method returns FALSE; does not check whether infeasibility or unboundedness was already detected in presolving (which would result in presolving being stopped although the method returns TRUE)

Returns: Returns TRUE if presolving is finished if no further reductions are detected

Parameters

Definition at line 643 of file scip_general.c.

References FALSE, NULL, SCIP_Bool, SCIP_CALL_ABORT, SCIPcheckStage(), SCIPcliquetableGetNCliques(), and TRUE.

Referenced by presolve(), presolveRound(), SCIP_DECL_CONSPRESOL(), and SCIP_DECL_PROPPRESOL().

◆ SCIPhasPerformedPresolve() ◆ SCIPpressedCtrlC()

returns whether the user pressed CTRL-C to interrupt the solving process

Returns: Returns TRUE if Ctrl-C was pressed, otherwise FALSE.

Parameters

Definition at line 721 of file scip_general.c.

References SCIPinterrupted().

◆ SCIPisStopped()

returns whether the solving process should be / was stopped before proving optimality; if the solving process should be / was stopped, the status returned by SCIPgetStatus() yields the reason for the premature abort

Returns: Returns TRUE if solving process is stopped/interrupted, otherwise FALSE.

Parameters

Definition at line 734 of file scip_general.c.

References FALSE, SCIP_CALL_ABORT, SCIPcheckStage(), SCIPsolveIsStopped(), and TRUE.

Referenced by applyCliqueFixings(), applyHeur(), applyNlobbt(), applyObbtBilinear(), applyProbing(), applyVbounds(), calculateScoreFromDeeperscore(), calculateScoreFromDeeperscoreAndCutoffs(), checkArraySizesGLS(), checkArraySizesHeur(), checkSystemGF2(), computeRowEchelonGF2(), detectRedundantConstraints(), doSeachEcAggr(), enfopsCons(), execRelpscost(), executeBranchingRecursive(), fillDigraph(), findCumulativeConss(), findNewBounds(), findPrecedenceConss(), generateClusterCuts(), generateGMICuts(), generateOddCycleCut(), heurExec(), liftOddCycleCut(), loadTcliquegraph(), performRandRounding(), preprocessCliques(), preprocessConstraintPairs(), processHashlists(), propagateCons(), removeConstraintsDueToNegCliques(), runVanillaStrongBranching(), SCIP_DECL_BRANCHEXECLP(), SCIP_DECL_CONSPRESOL(), SCIP_DECL_CONSPROP(), SCIP_DECL_CONSSEPALP(), SCIP_DECL_CONSSEPASOL(), SCIP_DECL_HEUREXEC(), SCIP_DECL_PRESOLEXEC(), SCIP_DECL_PROPPRESOL(), SCIP_DECL_SEPAEXECLP(), SCIP_DECL_SEPAEXECSOL(), SCIPapplyLockFixings(), SCIPmatrixCreate(), SCIPperformGenericDivingAlgorithm(), SCIPselectVarStrongBranching(), selectVarRecursive(), separateCardinality(), separateCuts(), separateGLS(), separateHeur(), separateSOS1(), solveBendersSubproblems(), solveLagrangianDual(), solvePricingHeuristic(), strengthenVarbounds(), tcliquegraphConstructCliqueTable(), tryAddSymmetryHandlingMethods(), tryOneOpt(), and writeBounds().

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