SCIP_Sol Struct Reference

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 50 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
SCIP_HEUR *	heur
int	runnum
int	depth
int	primalindex
int	index
SCIP_SOLORIGIN	solorigin
SCIP_Bool	hasinfval

Field Documentation

SCIP_Real SCIP_Sol::obj

objective value of solution

Definition at line 52 of file struct_sol.h.

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

SCIP_Real SCIP_Sol::time

clock time, when the solution was discovered

Definition at line 53 of file struct_sol.h.

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

SCIP_Longint SCIP_Sol::nodenum

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

Definition at line 54 of file struct_sol.h.

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

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 56 of file struct_sol.h.

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

SCIP_REALARRAY* SCIP_Sol::vals

solution values for variables

Definition at line 60 of file struct_sol.h.

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

SCIP_BOOLARRAY* SCIP_Sol::valid

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

Definition at line 61 of file struct_sol.h.

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

SCIP_HEUR* SCIP_Sol::heur

heuristic that found the solution (or NULL if it's an LP solution)

Definition at line 63 of file struct_sol.h.

Referenced by SCIPsolCopy(), SCIPsolGetHeur(), and SCIPsolSetHeur().

int SCIP_Sol::runnum

branch and bound run number in which the solution was found

Definition at line 64 of file struct_sol.h.

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

int SCIP_Sol::depth

depth at which the solution was found

Definition at line 65 of file struct_sol.h.

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

int SCIP_Sol::primalindex

index of solution in array of existing solutions of primal data

Definition at line 66 of file struct_sol.h.

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

int SCIP_Sol::index

consecutively numbered unique index of all created solutions

Definition at line 67 of file struct_sol.h.

Referenced by SCIPsolGetIndex().

SCIP_SOLORIGIN SCIP_Sol::solorigin

origin of solution: where to retrieve uncached elements

Definition at line 68 of file struct_sol.h.

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

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 69 of file struct_sol.h.

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