Detailed Description

primal CIP solution

For reasons of efficiency, a working solution only stores values that have been accessed at least once, or that have been changed from the value in the solution's source. The user has to call SCIPsolUnlink() in order to retrieve all non-cached elements from the solution's source and to store the values in the solution's own array. This changes the solution's origin to SCIP_SOLORIGIN_ZERO. A linked solution with origin SCIP_SOLORIGIN_LPSOL or SCIP_SOLORIGIN_PSEUDOSOL becomes invalid after the next node is focused (i.e. the LP and pseudo solutions changed) and cannot be accessed anymore.

Solutions with origin ORIGINAL contain the values for original variables. The stored objective value also corresponds to the original problem.

Definition at line 64 of file struct_sol.h.

#include <struct_sol.h>

Data Fields
SCIP_Real	obj

SCIP_Real	time

SCIP_Longint	nodenum

SCIP_Longint	lpcount

SCIP_REALARRAY *	vals

SCIP_BOOLARRAY *	valid

union {
SCIP_HEUR * heur

SCIP_RELAX * relax

}	creator

SCIP_VIOL	viol

int	runnum

int	depth

int	primalindex

int	index

SCIP_SOLORIGIN	solorigin

SCIP_Bool	hasinfval

SCIP_SOLTYPE	type

Field Documentation

◆ obj

SCIP_Real SCIP_Sol::obj

objective value of solution

Definition at line 66 of file struct_sol.h.

Referenced by SCIPsolCheck(), SCIPsolClear(), SCIPsolCopy(), SCIPsolGetObj(), SCIPsolGetOrigObj(), SCIPsolLinkLPSol(), SCIPsolLinkNLPSol(), SCIPsolLinkPseudoSol(), SCIPsolLinkRelaxSol(), SCIPsolOrigAddObjval(), SCIPsolRecomputeObj(), SCIPsolRetransform(), SCIPsolsAreEqual(), SCIPsolSetUnknown(), SCIPsolTransform(), and SCIPsolUpdateVarObj().

◆ time

SCIP_Real SCIP_Sol::time

clock time, when the solution was discovered

Definition at line 67 of file struct_sol.h.

Referenced by SCIPcopySolStats(), SCIPsolCopy(), SCIPsolGetTime(), and solStamp().

◆ nodenum

SCIP_Longint SCIP_Sol::nodenum

last node number of current run, where this solution was modified

Definition at line 68 of file struct_sol.h.

Referenced by SCIPcopySolStats(), SCIPsolCheck(), SCIPsolCopy(), SCIPsolGetNodenum(), SCIPsolGetVal(), SCIPsolIncVal(), SCIPsolSetVal(), and solStamp().

◆ lpcount

SCIP_Longint SCIP_Sol::lpcount

number of LPs solved when this solution was created, needed for debug checks concerning solutions linked to the LP solution

Definition at line 70 of file struct_sol.h.

Referenced by SCIPsolCopy(), SCIPsolGetVal(), SCIPsolRound(), and solStamp().

◆ vals

SCIP_REALARRAY* SCIP_Sol::vals

solution values for variables

Definition at line 74 of file struct_sol.h.

Referenced by SCIPsolCopy(), SCIPsolMarkPartial(), SCIPsolTransform(), solGetArrayVal(), solIncArrayVal(), and solSetArrayVal().

◆ valid

SCIP_BOOLARRAY* SCIP_Sol::valid

is value in vals array valid? otherwise it has to be retrieved from origin

Definition at line 75 of file struct_sol.h.

Referenced by SCIPsolCopy(), SCIPsolGetVal(), SCIPsolMarkPartial(), SCIPsolRound(), SCIPsolTransform(), solClearArrays(), solGetArrayVal(), solIncArrayVal(), solSetArrayVal(), and solUnlinkVar().

◆ heur

SCIP_HEUR* SCIP_Sol::heur

heuristic that found the solution, if solution is of heuristic type

Definition at line 79 of file struct_sol.h.

Referenced by SCIPsolGetHeur(), and SCIPsolSetHeur().

◆ relax

SCIP_RELAX* SCIP_Sol::relax

relaxation handler that found the solution, if solution has relax type

Definition at line 80 of file struct_sol.h.

Referenced by SCIPsolGetRelax(), and SCIPsolSetRelax().

◆ creator

union { ... } SCIP_Sol::creator

Referenced by SCIPsolGetHeur(), SCIPsolGetRelax(), SCIPsolSetHeur(), and SCIPsolSetRelax().

◆ viol

SCIP_VIOL SCIP_Sol::viol

maximum violations of problem constraints

Definition at line 82 of file struct_sol.h.

Referenced by SCIPsolCopy(), SCIPsolGetAbsBoundViolation(), SCIPsolGetAbsConsViolation(), SCIPsolGetAbsIntegralityViolation(), SCIPsolGetAbsLPRowViolation(), SCIPsolGetRelBoundViolation(), SCIPsolGetRelConsViolation(), SCIPsolGetRelLPRowViolation(), SCIPsolResetViolations(), SCIPsolUpdateBoundViolation(), SCIPsolUpdateConsViolation(), SCIPsolUpdateIntegralityViolation(), and SCIPsolUpdateLPRowViolation().

◆ runnum

int SCIP_Sol::runnum

branch and bound run number in which the solution was found

Definition at line 83 of file struct_sol.h.

Referenced by SCIPcopySolStats(), SCIPsolCopy(), SCIPsolGetRunnum(), SCIPsolGetVal(), SCIPsolIncVal(), SCIPsolSetVal(), and solStamp().

◆ depth

int SCIP_Sol::depth

depth at which the solution was found

Definition at line 84 of file struct_sol.h.

Referenced by SCIPcopySolStats(), SCIPsolCopy(), SCIPsolGetDepth(), and solStamp().

◆ primalindex

int SCIP_Sol::primalindex

index of solution in array of existing solutions of primal data

Definition at line 85 of file struct_sol.h.

Referenced by SCIPsolGetPrimalIndex(), SCIPsolSetPrimalIndex(), and SCIPsolTransform().

◆ index

int SCIP_Sol::index

consecutively numbered unique index of all created solutions

Definition at line 86 of file struct_sol.h.

Referenced by SCIPsolGetIndex().

◆ solorigin

SCIP_SOLORIGIN SCIP_Sol::solorigin

origin of solution: where to retrieve uncached elements

Definition at line 87 of file struct_sol.h.

Referenced by SCIPsolCheck(), SCIPsolClear(), SCIPsolCopy(), SCIPsolGetOrigin(), SCIPsolGetRayVal(), SCIPsolGetVal(), SCIPsolIncVal(), SCIPsolIsOriginal(), SCIPsolIsPartial(), SCIPsolLinkLPSol(), SCIPsolLinkNLPSol(), SCIPsolLinkPseudoSol(), SCIPsolLinkRelaxSol(), SCIPsolMarkPartial(), SCIPsolOrigAddObjval(), SCIPsolPrint(), SCIPsolRetransform(), SCIPsolRound(), SCIPsolSetUnknown(), SCIPsolSetVal(), SCIPsolTransform(), SCIPsolUnlink(), solGetArrayVal(), and solUnlinkVar().

◆ hasinfval

SCIP_Bool SCIP_Sol::hasinfval

does the solution (potentially) contain an infinite value? Note: this could also be implemented as a counter for the number of infinite values, to avoid redundant checks when resetting inf. solution values

Definition at line 88 of file struct_sol.h.

Referenced by SCIPsolCheck(), SCIPsolCopy(), solClearArrays(), solIncArrayVal(), and solSetArrayVal().

◆ type

SCIP_SOLTYPE SCIP_Sol::type

type of solution: heuristic or (LP) relaxation solution, or unspecified origin

Definition at line 92 of file struct_sol.h.

Referenced by SCIPsolCopy(), SCIPsolGetHeur(), SCIPsolGetRelax(), SCIPsolGetType(), SCIPsolSetHeur(), SCIPsolSetLPRelaxation(), SCIPsolSetPseudo(), SCIPsolSetRelax(), and SCIPsolSetStrongbranching().

SCIP