Detailed Description
LP diving heuristic that chooses fixings w.r.t. the matrix coefficients.
Indicator constraints are taken into account if present.
Definition in file heur_coefdiving.c.
#include "scip/heur_coefdiving.h"
#include "scip/heuristics.h"
#include "scip/pub_heur.h"
#include "scip/pub_message.h"
#include "scip/pub_misc.h"
#include "scip/pub_var.h"
#include "scip/scip_heur.h"
#include "scip/scip_lp.h"
#include "scip/scip_mem.h"
#include "scip/scip_numerics.h"
#include "scip/scip_sol.h"
#include <string.h>
Go to the source code of this file.
Macros | |
#define | HEUR_NAME "coefdiving" |
#define | HEUR_DESC "LP diving heuristic that chooses fixings w.r.t. the matrix coefficients" |
#define | HEUR_DISPCHAR SCIP_HEURDISPCHAR_DIVING |
#define | HEUR_PRIORITY -1001000 |
#define | HEUR_FREQ -1 |
#define | HEUR_FREQOFS 1 |
#define | HEUR_MAXDEPTH -1 |
#define | HEUR_TIMING SCIP_HEURTIMING_AFTERLPPLUNGE |
#define | HEUR_USESSUBSCIP FALSE |
#define | DIVESET_DIVETYPES SCIP_DIVETYPE_INTEGRALITY | SCIP_DIVETYPE_SOS1VARIABLE |
#define | DIVESET_ISPUBLIC TRUE |
#define | DEFAULT_MINRELDEPTH 0.0 |
#define | DEFAULT_MAXRELDEPTH 1.0 |
#define | DEFAULT_MAXLPITERQUOT 0.05 |
#define | DEFAULT_MAXLPITEROFS 1000 |
#define | DEFAULT_MAXDIVEUBQUOT 0.8 |
#define | DEFAULT_MAXDIVEAVGQUOT 0.0 |
#define | DEFAULT_MAXDIVEUBQUOTNOSOL 0.1 |
#define | DEFAULT_MAXDIVEAVGQUOTNOSOL 0.0 |
#define | DEFAULT_BACKTRACK TRUE |
#define | DEFAULT_LPRESOLVEDOMCHGQUOT 0.15 |
#define | DEFAULT_LPSOLVEFREQ 0 |
#define | DEFAULT_ONLYLPBRANCHCANDS FALSE |
#define | DEFAULT_RANDSEED 83 |
#define | divesetAvailableCoefdiving NULL |
Functions | |
static | SCIP_DECL_HEURCOPY (heurCopyCoefdiving) |
static | SCIP_DECL_HEURFREE (heurFreeCoefdiving) |
static | SCIP_DECL_HEURINIT (heurInitCoefdiving) |
static | SCIP_DECL_HEUREXIT (heurExitCoefdiving) |
static | SCIP_DECL_HEUREXEC (heurExecCoefdiving) |
static | SCIP_DECL_DIVESETGETSCORE (divesetGetScoreCoefdiving) |
SCIP_RETCODE | SCIPincludeHeurCoefdiving (SCIP *scip) |
Macro Definition Documentation
◆ HEUR_NAME
#define HEUR_NAME "coefdiving" |
Definition at line 40 of file heur_coefdiving.c.
Referenced by SCIPincludeHeurCoefdiving().
◆ HEUR_DESC
#define HEUR_DESC "LP diving heuristic that chooses fixings w.r.t. the matrix coefficients" |
Definition at line 41 of file heur_coefdiving.c.
Referenced by SCIPincludeHeurCoefdiving().
◆ HEUR_DISPCHAR
#define HEUR_DISPCHAR SCIP_HEURDISPCHAR_DIVING |
Definition at line 42 of file heur_coefdiving.c.
Referenced by SCIPincludeHeurCoefdiving().
◆ HEUR_PRIORITY
#define HEUR_PRIORITY -1001000 |
Definition at line 43 of file heur_coefdiving.c.
Referenced by SCIPincludeHeurCoefdiving().
◆ HEUR_FREQ
#define HEUR_FREQ -1 |
Definition at line 44 of file heur_coefdiving.c.
Referenced by SCIPincludeHeurCoefdiving().
◆ HEUR_FREQOFS
#define HEUR_FREQOFS 1 |
Definition at line 45 of file heur_coefdiving.c.
Referenced by SCIPincludeHeurCoefdiving().
◆ HEUR_MAXDEPTH
#define HEUR_MAXDEPTH -1 |
Definition at line 46 of file heur_coefdiving.c.
Referenced by SCIPincludeHeurCoefdiving().
◆ HEUR_TIMING
#define HEUR_TIMING SCIP_HEURTIMING_AFTERLPPLUNGE |
Definition at line 47 of file heur_coefdiving.c.
Referenced by SCIPincludeHeurCoefdiving().
◆ HEUR_USESSUBSCIP
#define HEUR_USESSUBSCIP FALSE |
does the heuristic use a secondary SCIP instance?
Definition at line 48 of file heur_coefdiving.c.
Referenced by SCIPincludeHeurCoefdiving().
◆ DIVESET_DIVETYPES
#define DIVESET_DIVETYPES SCIP_DIVETYPE_INTEGRALITY | SCIP_DIVETYPE_SOS1VARIABLE |
bit mask that represents all supported dive types
Definition at line 49 of file heur_coefdiving.c.
Referenced by SCIPincludeHeurCoefdiving().
◆ DIVESET_ISPUBLIC
#define DIVESET_ISPUBLIC TRUE |
is this dive set publicly available (ie., can be used by other primal heuristics?)
Definition at line 50 of file heur_coefdiving.c.
Referenced by SCIPincludeHeurCoefdiving().
◆ DEFAULT_MINRELDEPTH
#define DEFAULT_MINRELDEPTH 0.0 |
minimal relative depth to start diving
Definition at line 57 of file heur_coefdiving.c.
Referenced by SCIPincludeHeurCoefdiving().
◆ DEFAULT_MAXRELDEPTH
#define DEFAULT_MAXRELDEPTH 1.0 |
maximal relative depth to start diving
Definition at line 58 of file heur_coefdiving.c.
Referenced by SCIPincludeHeurCoefdiving().
◆ DEFAULT_MAXLPITERQUOT
#define DEFAULT_MAXLPITERQUOT 0.05 |
maximal fraction of diving LP iterations compared to node LP iterations
Definition at line 59 of file heur_coefdiving.c.
Referenced by SCIPincludeHeurCoefdiving().
◆ DEFAULT_MAXLPITEROFS
#define DEFAULT_MAXLPITEROFS 1000 |
additional number of allowed LP iterations
Definition at line 60 of file heur_coefdiving.c.
Referenced by SCIPincludeHeurCoefdiving().
◆ DEFAULT_MAXDIVEUBQUOT
#define DEFAULT_MAXDIVEUBQUOT 0.8 |
maximal quotient (curlowerbound - lowerbound)/(cutoffbound - lowerbound) where diving is performed (0.0: no limit)
Definition at line 61 of file heur_coefdiving.c.
Referenced by SCIPincludeHeurCoefdiving().
◆ DEFAULT_MAXDIVEAVGQUOT
#define DEFAULT_MAXDIVEAVGQUOT 0.0 |
maximal quotient (curlowerbound - lowerbound)/(avglowerbound - lowerbound) where diving is performed (0.0: no limit)
Definition at line 64 of file heur_coefdiving.c.
Referenced by SCIPincludeHeurCoefdiving().
◆ DEFAULT_MAXDIVEUBQUOTNOSOL
#define DEFAULT_MAXDIVEUBQUOTNOSOL 0.1 |
maximal UBQUOT when no solution was found yet (0.0: no limit)
Definition at line 67 of file heur_coefdiving.c.
Referenced by SCIPincludeHeurCoefdiving().
◆ DEFAULT_MAXDIVEAVGQUOTNOSOL
#define DEFAULT_MAXDIVEAVGQUOTNOSOL 0.0 |
maximal AVGQUOT when no solution was found yet (0.0: no limit)
Definition at line 68 of file heur_coefdiving.c.
Referenced by SCIPincludeHeurCoefdiving().
◆ DEFAULT_BACKTRACK
#define DEFAULT_BACKTRACK TRUE |
use one level of backtracking if infeasibility is encountered?
Definition at line 69 of file heur_coefdiving.c.
Referenced by SCIPincludeHeurCoefdiving().
◆ DEFAULT_LPRESOLVEDOMCHGQUOT
#define DEFAULT_LPRESOLVEDOMCHGQUOT 0.15 |
percentage of immediate domain changes during probing to trigger LP resolve
Definition at line 70 of file heur_coefdiving.c.
Referenced by SCIPincludeHeurCoefdiving().
◆ DEFAULT_LPSOLVEFREQ
#define DEFAULT_LPSOLVEFREQ 0 |
LP solve frequency for diving heuristics
Definition at line 71 of file heur_coefdiving.c.
Referenced by SCIPincludeHeurCoefdiving().
◆ DEFAULT_ONLYLPBRANCHCANDS
#define DEFAULT_ONLYLPBRANCHCANDS FALSE |
should only LP branching candidates be considered instead of the slower but more general constraint handler diving variable selection?
Definition at line 72 of file heur_coefdiving.c.
Referenced by SCIPincludeHeurCoefdiving().
◆ DEFAULT_RANDSEED
#define DEFAULT_RANDSEED 83 |
default random seed
Definition at line 75 of file heur_coefdiving.c.
Referenced by SCIPincludeHeurCoefdiving().
◆ divesetAvailableCoefdiving
#define divesetAvailableCoefdiving NULL |
Definition at line 274 of file heur_coefdiving.c.
Referenced by SCIPincludeHeurCoefdiving().
Function Documentation
◆ SCIP_DECL_HEURCOPY()
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static |
copy method for primal heuristic plugins (called when SCIP copies plugins)
Definition at line 93 of file heur_coefdiving.c.
◆ SCIP_DECL_HEURFREE()
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destructor of primal heuristic to free user data (called when SCIP is exiting)
Definition at line 107 of file heur_coefdiving.c.
◆ SCIP_DECL_HEURINIT()
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initialization method of primal heuristic (called after problem was transformed)
Definition at line 127 of file heur_coefdiving.c.
◆ SCIP_DECL_HEUREXIT()
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deinitialization method of primal heuristic (called before transformed problem is freed)
Definition at line 147 of file heur_coefdiving.c.
◆ SCIP_DECL_HEUREXEC()
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execution method of primal heuristic
Definition at line 167 of file heur_coefdiving.c.
◆ SCIP_DECL_DIVESETGETSCORE()
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static |
returns a score for the given candidate – the best candidate maximizes the diving score
Definition at line 187 of file heur_coefdiving.c.