# SCIP

Solving Constraint Integer Programs

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 63 of file struct_sol.h.

#include <struct_sol.h>

## Data Fields

SCIP_Real obj

SCIP_Real time

SCIP_Longint nodenum

SCIP_Longint lpcount

SCIP_REALARRAYvals

SCIP_BOOLARRAYvalid

SCIP_HEURheur

SCIP_VIOL viol

int runnum

int depth

int primalindex

int index

SCIP_SOLORIGIN solorigin

SCIP_Bool hasinfval

## ◆ obj

 SCIP_Real SCIP_Sol::obj

objective value of solution

Definition at line 65 of file struct_sol.h.

## ◆ time

 SCIP_Real SCIP_Sol::time

clock time, when the solution was discovered

Definition at line 66 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 67 of file struct_sol.h.

## ◆ 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 69 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 73 of file struct_sol.h.

## ◆ valid

 SCIP_BOOLARRAY* SCIP_Sol::valid

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

Definition at line 74 of file struct_sol.h.

## ◆ heur

 SCIP_HEUR* SCIP_Sol::heur

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

Definition at line 76 of file struct_sol.h.

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

## ◆ viol

 SCIP_VIOL SCIP_Sol::viol

maximum violations of problem constraints

Definition at line 77 of file struct_sol.h.

## ◆ runnum

 int SCIP_Sol::runnum

branch and bound run number in which the solution was found

Definition at line 78 of file struct_sol.h.

## ◆ depth

 int SCIP_Sol::depth

depth at which the solution was found

Definition at line 79 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 80 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 81 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 82 of file struct_sol.h.

## ◆ 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 83 of file struct_sol.h.

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