Detailed Description

event handler for tree size estimation and restarts

This event handler plugin provides different methods for approximating the current fraction of the search that has already been completed and for estimating the total tree size at completion. It can trigger restarts of the current run if the current run seems hopeless.

For details about the available approximations of search completion, please see

Anderson, Hendel, Le Bodic, Pfetsch Estimating The Size of Branch-and-Bound Trees under preparation

This code is a largely enriched version of a code that was used for clairvoyant restarts, see

Anderson, Hendel, Le Bodic, Viernickel Clairvoyant Restarts in Branch-and-Bound Search Using Online Tree-Size Estimation AAAI-19: Proceedings of the Thirty-Third AAAI Conference on Artificial Intelligence, 2018

Author: Gregor Hendel

Definition in file event_estim.c.

#include <string.h>
#include "blockmemshell/memory.h"
#include "scip/event_estim.h"
#include "scip/prop_symmetry.h"
#include "scip/pub_disp.h"
#include "scip/pub_event.h"
#include "scip/pub_fileio.h"
#include "scip/pub_message.h"
#include "scip/pub_misc.h"
#include "scip/pub_tree.h"
#include "scip/scip_disp.h"
#include "scip/scip_event.h"
#include "scip/scip_general.h"
#include "scip/scip_mem.h"
#include "scip/scip_message.h"
#include "scip/scip_nlp.h"
#include "scip/scip_numerics.h"
#include "scip/scip_param.h"
#include "scip/scip_pricer.h"
#include "scip/scip_sol.h"
#include "scip/scip_solve.h"
#include "scip/scip_solvingstats.h"
#include "scip/scip_table.h"
#include "scip/scip_timing.h"
#include "scip/scip_tree.h"
#include "scip/type_disp.h"
#include "scip/type_event.h"
#include "scip/type_message.h"
#include "scip/type_misc.h"
#include "scip/type_retcode.h"
#include "scip/type_stat.h"
#include "scip/type_table.h"

Go to the source code of this file.

Data Structures
struct	DoubleExpSmooth

struct	TreeProfileStats

struct	TreeProfile

struct	TreeData

struct	SubtreeSumGap

struct	TimeSeries

struct	NodeInfo

struct	SCIP_RegForest

Macros
#define	EVENTHDLR_NAME "estim"

#define	EVENTHDLR_DESC "event handler for tree size estimation and restarts"

#define	EVENTTYPE_ESTIM (SCIP_EVENTTYPE_NODEDELETE \| SCIP_EVENTTYPE_NODEBRANCHED)

#define	RESTARTPOLICY_CHAR_NEVER 'n'

#define	RESTARTPOLICY_CHAR_ALWAYS 'a'

#define	RESTARTPOLICY_CHAR_COMPLETION 'c'

#define	RESTARTPOLICY_CHAR_ESTIMATION 'e'

#define	DES_USETRENDINLEVEL TRUE

#define	TABLE_NAME "estim"

#define	TABLE_DESC "tree size estimations statistics table"

#define	TABLE_POSITION 18500

#define	TABLE_EARLIEST_STAGE SCIP_STAGE_INIT

#define	DISP_NAME "completed"

#define	DISP_DESC "completion of search in percent (based on tree size estimation)"

#define	DISP_HEADER "compl."

#define	DISP_WIDTH 8

#define	DISP_PRIORITY 110000

#define	DISP_POSITION 30100

#define	DISP_STRIPLINE TRUE

#define	INITIALSIZE 100

#define	SESCOEFF 0.75

#define	DES_ALPHA_TREEWEIGHT 0.65

#define	DES_BETA_TREEWEIGHT 0.15

#define	DES_ALPHA_GAP 0.6

#define	DES_BETA_GAP 0.15

#define	DES_ALPHA_LEAFFREQUENCY 0.3

#define	DES_BETA_LEAFFREQUENCY 0.33

#define	DES_ALPHA_SSG 0.6

#define	DES_BETA_SSG 0.15

#define	DES_ALPHA_OPENNODES 0.6

#define	DES_BETA_OPENNODES 0.15

#define	MAX_REGFORESTSIZE 10000000

#define	COMPLETIONTYPE_AUTO 'a'

#define	COMPLETIONTYPE_REGFOREST 'r'

#define	COMPLETIONTYPE_MONOREG 'm'

#define	COMPLETIONTYPE_TREEWEIGHT 'w'

#define	COMPLETIONTYPE_SSG 's'

#define	COMPLETIONTYPE_GAP 'g'

#define	ESTIMMETHOD_COMPL 'c'

#define	ESTIMMETHOD_WBE 'b'

#define	ESTIMMETHOD_ENSMBL 'e'

#define	ESTIMMETHOD_GAP 'g'

#define	ESTIMMETHOD_LFREQ 'l'

#define	ESTIMMETHOD_OPEN 'o'

#define	ESTIMMETHOD_SSG 's'

#define	ESTIMMETHOD_TPROF 't'

#define	ESTIMMETHOD_TREEWEIGHT 'w'

#define	ESTIMMETHODS "bceglostw"

#define	TREEPROFILE_MINSIZE 512

#define	SSG_STARTPRIMBOUND SCIP_INVALID

#define	NTIMESERIES 5

#define	DEFAULT_USELEAFTS TRUE

#define	DEFAULT_REPORTFREQ -1

#define	DEFAULT_REGFORESTFILENAME "-"

#define	DEFAULT_COEFMONOWEIGHT 0.3667

#define	DEFAULT_COEFMONOSSG 0.6333

#define	DEFAULT_COMPLETIONTYPE COMPLETIONTYPE_AUTO

#define	DEFAULT_ESTIMMETHOD ESTIMMETHOD_TREEWEIGHT

#define	DEFAULT_TREEPROFILE_ENABLED FALSE

#define	DEFAULT_TREEPROFILE_MINNODESPERDEPTH 20.0

#define	DEFAULT_RESTARTPOLICY 'e'

#define	DEFAULT_RESTARTLIMIT 1

#define	DEFAULT_MINNODES 1000L

#define	DEFAULT_COUNTONLYLEAVES FALSE

#define	DEFAULT_RESTARTFACTOR 50.0

#define	DEFAULT_RESTARTNONLINEAR FALSE

#define	DEFAULT_RESTARTACTPRICERS FALSE

#define	DEFAULT_HITCOUNTERLIM 50

#define	DEFAULT_SSG_NMAXSUBTREES -1

#define	DEFAULT_SSG_NMINNODESLASTSPLIT 0L

#define	DEFAULT_SHOWSTATS FALSE

#define	DECL_TIMESERIESUPDATE(x)

Typedefs
typedef enum RestartPolicy	RESTARTPOLICY

typedef struct DoubleExpSmooth	DOUBLEEXPSMOOTH

typedef struct TimeSeries	TIMESERIES

typedef struct TreeData	TREEDATA

typedef enum TsPos	TSPOS

typedef struct SCIP_RegForest	SCIP_REGFOREST

typedef struct TreeProfileStats	TREEPROFILESTATS

typedef struct TreeProfile	TREEPROFILE

typedef struct SubtreeSumGap	SUBTREESUMGAP

typedef struct NodeInfo	NODEINFO

Enumerations
enum	RestartPolicy { RESTARTPOLICY_NEVER = 0 , RESTARTPOLICY_ALWAYS = 1 , RESTARTPOLICY_ESTIMATION = 2 , RESTARTPOLICY_COMPLETION = 3 }

enum	TsPos { TSPOS_NONE = -1 , TSPOS_GAP = 0 , TSPOS_TREEWEIGHT = 1 , TSPOS_LFREQ = 2 , TSPOS_SSG = 3 , TSPOS_OPEN = 4 }

Functions
static char *	real2String (SCIP_Real num, char *buf, int digits)

static void	SCIPregForestFree (SCIP_REGFOREST **regforest)

static SCIP_Real	SCIPregForestPredict (SCIP_REGFOREST regforest, SCIP_Real datapoint)

static SCIP_RETCODE	SCIPregForestFromFile (SCIP_REGFOREST *regforest, const char filename)

static SCIP_Bool	isEqualTreeProfileStats (TREEPROFILESTATS stats, TREEPROFILESTATS other)

static void	copyTreeProfileStats (TREEPROFILESTATS dest, TREEPROFILESTATS src)

static void	resetTreeProfileStats (TREEPROFILESTATS *treeprofilestats)

static SCIP_RETCODE	extendMemoryTreeProfile (SCIP scip, TREEPROFILE treeprofile, int mindepth)

static SCIP_RETCODE	createTreeProfile (SCIP scip, TREEPROFILE *treeprofile)

static void	freeTreeProfile (SCIP scip, TREEPROFILE *treeprofile)

static SCIP_RETCODE	updateTreeProfile (SCIP scip, TREEPROFILE treeprofile, SCIP_NODE *node)

static SCIP_Real	predictTotalSizeTreeProfile (SCIP scip, TREEPROFILE treeprofile, SCIP_Real minnodesperdepth)

static void	subtreeSumGapDelSubtrees (SCIP scip, SUBTREESUMGAP ssg)

static SCIP_RETCODE	subtreeSumGapReset (SCIP scip, SUBTREESUMGAP ssg)

static SCIP_RETCODE	subtreeSumGapCreate (SCIP scip, SUBTREESUMGAP *ssg)

static void	subtreeSumGapFree (SCIP scip, SUBTREESUMGAP *ssg)

static	SCIP_DECL_SORTPTRCOMP (compareNodeInfos)

static	SCIP_DECL_PQUEUEELEMCHGPOS (elemChgPosNodeInfo)

static SCIP_RETCODE	subtreeSumGapStoreNode (SCIP scip, SUBTREESUMGAP ssg, SCIP_NODE *node, int subtreeidx)

static SCIP_RETCODE	subtreeSumGapSplit (SCIP scip, SUBTREESUMGAP ssg, SCIP_Bool addfocusnode)

static SCIP_Real	calcGap (SCIP *scip, SCIP_Real lowerbound)

static SCIP_RETCODE	subtreeSumGapRemoveNode (SCIP scip, SUBTREESUMGAP ssg, SCIP_NODE *node)

static SCIP_RETCODE	subtreeSumGapInsertChildren (SCIP scip, SUBTREESUMGAP ssg)

static SCIP_RETCODE	subtreeSumGapComputeFromScratchEfficiently (SCIP scip, SUBTREESUMGAP ssg, SCIP_Bool updatescaling)

static SCIP_RETCODE	subtreeSumGapUpdate (SCIP scip, SUBTREESUMGAP ssg, SCIP_NODE *node, int nchildren, SCIP_Longint nsolvednodes)

static SCIP_RETCODE	resetTreeData (SCIP scip, TREEDATA treedata)

static SCIP_RETCODE	createTreeData (SCIP scip, TREEDATA *treedata)

static void	freeTreeData (SCIP scip, TREEDATA *treedata)

static SCIP_RETCODE	updateTreeData (SCIP scip, TREEDATA treedata, SCIP_NODE *node, int nchildren)

static SCIP_Real	treeDataGetWbe (TREEDATA *treedata)

static void	doubleExpSmoothReset (DOUBLEEXPSMOOTH *des, SCIP_Real initialvalue)

static void	doubleExpSmoothInit (DOUBLEEXPSMOOTH *des, SCIP_Real x1)

static void	doubleExpSmoothUpdate (DOUBLEEXPSMOOTH *des, SCIP_Real xnew)

static SCIP_Real	doubleExpSmoothGetTrend (DOUBLEEXPSMOOTH *des)

static void	timeSeriesReset (TIMESERIES *timeseries)

static SCIP_RETCODE	timeSeriesCreate (SCIP scip, TIMESERIES timeseries, const char name, SCIP_Real targetvalue, SCIP_Real initialvalue, SCIP_Real alpha, SCIP_Real beta, DECL_TIMESERIESUPDATE((*timeseriesupdate)))

static void	timeSeriesFree (SCIP scip, TIMESERIES *timeseries)

static SCIP_Real	timeSeriesGetValue (TIMESERIES *timeseries)

static SCIP_Real	timeSeriesGetTargetValue (TIMESERIES *timeseries)

static int	timeSeriesGetResolution (TIMESERIES *timeseries)

static SCIP_Real	timeSeriesEstimate (TIMESERIES timeseries, TREEDATA treedata)

static void	timeSeriesUpdateSmoothEstimation (TIMESERIES *timeseries, SCIP_Real estimation)

static SCIP_Real	timeSeriesGetSmoothEstimation (TIMESERIES *timeseries)

static void	timeSeriesResample (TIMESERIES *timeseries)

static SCIP_RETCODE	timeSeriesUpdate (SCIP scip, TIMESERIES timeseries, TREEDATA *treedata, SCIP_Bool isleaf)

static char *	timeSeriesGetName (TIMESERIES *timeseries)

static void	resetTimeSeries (SCIP_EVENTHDLRDATA *eventhdlrdata)

static void	freeTimeSeries (SCIP scip, SCIP_EVENTHDLRDATA eventhdlrdata)

static SCIP_Real	getEnsembleEstimation (SCIP_EVENTHDLRDATA *eventhdlrdata)

static SCIP_RETCODE	getSearchCompletion (SCIP_EVENTHDLRDATA eventhdlrdata, SCIP_Real completed)

static SCIP_RETCODE	getEstimCompletion (SCIP scip, SCIP_EVENTHDLRDATA eventhdlrdata, SCIP_Real *estim)

static	DECL_TIMESERIESUPDATE (timeseriesUpdateGap)

static	DECL_TIMESERIESUPDATE (timeseriesUpdateTreeWeight)

static	DECL_TIMESERIESUPDATE (timeseriesUpdateLeafFreq)

static	DECL_TIMESERIESUPDATE (timeseriesUpdateSsg)

static	DECL_TIMESERIESUPDATE (timeseriesUpdateOpenNodes)

static SCIP_RETCODE	includeTimeseries (SCIP scip, SCIP_EVENTHDLRDATA eventhdlrdata)

static RESTARTPOLICY	getRestartPolicy (SCIP_EVENTHDLRDATA *eventhdlrdata)

static SCIP_Bool	isRestartApplicable (SCIP scip, SCIP_EVENTHDLRDATA eventhdlrdata)

static SCIP_Bool	shouldApplyRestartCompletion (SCIP scip, SCIP_EVENTHDLRDATA eventhdlrdata)

static SCIP_Bool	shouldApplyRestartEstimation (SCIP scip, SCIP_EVENTHDLRDATA eventhdlrdata)

static SCIP_Bool	shouldApplyRestart (SCIP scip, SCIP_EVENTHDLRDATA eventhdlrdata)

static SCIP_RETCODE	updateTimeseries (SCIP scip, SCIP_EVENTHDLRDATA eventhdlrdata, TREEDATA *treedata, SCIP_Bool isleaf)

static char *	printReport (SCIP scip, SCIP_EVENTHDLRDATA eventhdlrdata, char *strbuf, int reportnum)

static	SCIP_DECL_EVENTCOPY (eventCopyEstim)

static	SCIP_DECL_EVENTFREE (eventFreeEstim)

static	SCIP_DECL_EVENTINIT (eventInitEstim)

static	SCIP_DECL_EVENTEXIT (eventExitEstim)

static	SCIP_DECL_EVENTINITSOL (eventInitsolEstim)

static	SCIP_DECL_EVENTEXITSOL (eventExitsolEstim)

static	SCIP_DECL_EVENTEXEC (eventExecEstim)

static	SCIP_DECL_TABLEOUTPUT (tableOutputEstim)

static	SCIP_DECL_DISPOUTPUT (dispOutputCompleted)

SCIP_RETCODE	SCIPincludeEventHdlrEstim (SCIP *scip)

SCIP_Real	SCIPgetTreesizeEstimation (SCIP *scip)

Macro Definition Documentation

◆ EVENTHDLR_NAME

#define EVENTHDLR_NAME "estim"

Definition at line 82 of file event_estim.c.

◆ EVENTHDLR_DESC

#define EVENTHDLR_DESC "event handler for tree size estimation and restarts"

Definition at line 83 of file event_estim.c.

◆ EVENTTYPE_ESTIM

#define EVENTTYPE_ESTIM (SCIP_EVENTTYPE_NODEDELETE | SCIP_EVENTTYPE_NODEBRANCHED)

Definition at line 84 of file event_estim.c.

◆ RESTARTPOLICY_CHAR_NEVER

#define RESTARTPOLICY_CHAR_NEVER 'n'

Definition at line 101 of file event_estim.c.

◆ RESTARTPOLICY_CHAR_ALWAYS

#define RESTARTPOLICY_CHAR_ALWAYS 'a'

Definition at line 102 of file event_estim.c.

◆ RESTARTPOLICY_CHAR_COMPLETION

#define RESTARTPOLICY_CHAR_COMPLETION 'c'

Definition at line 103 of file event_estim.c.

◆ RESTARTPOLICY_CHAR_ESTIMATION

#define RESTARTPOLICY_CHAR_ESTIMATION 'e'

Definition at line 104 of file event_estim.c.

◆ DES_USETRENDINLEVEL

#define DES_USETRENDINLEVEL TRUE

Should the trend be used in the level update?

Definition at line 106 of file event_estim.c.

◆ TABLE_NAME

#define TABLE_NAME "estim"

Definition at line 109 of file event_estim.c.

◆ TABLE_DESC

#define TABLE_DESC "tree size estimations statistics table"

Definition at line 110 of file event_estim.c.

◆ TABLE_POSITION

#define TABLE_POSITION 18500

the position of the statistics table

Definition at line 111 of file event_estim.c.

◆ TABLE_EARLIEST_STAGE

#define TABLE_EARLIEST_STAGE SCIP_STAGE_INIT

output of the statistics table is only printed from this stage onwards

Definition at line 112 of file event_estim.c.

◆ DISP_NAME

#define DISP_NAME "completed"

Definition at line 115 of file event_estim.c.

◆ DISP_DESC

#define DISP_DESC "completion of search in percent (based on tree size estimation)"

Definition at line 116 of file event_estim.c.

◆ DISP_HEADER

#define DISP_HEADER "compl."

Definition at line 117 of file event_estim.c.

◆ DISP_WIDTH

#define DISP_WIDTH 8

the width of the display column

Definition at line 118 of file event_estim.c.

◆ DISP_PRIORITY

#define DISP_PRIORITY 110000

the priority of the display column

Definition at line 119 of file event_estim.c.

◆ DISP_POSITION

#define DISP_POSITION 30100

the relative position of the display column

Definition at line 120 of file event_estim.c.

◆ DISP_STRIPLINE

#define DISP_STRIPLINE TRUE

the default for whether the display column should be separated with a line from its right neighbor

Definition at line 122 of file event_estim.c.

◆ INITIALSIZE

#define INITIALSIZE 100

Definition at line 123 of file event_estim.c.

◆ SESCOEFF

#define SESCOEFF 0.75

coefficient of single exponential smoothing of estimation

Definition at line 124 of file event_estim.c.

◆ DES_ALPHA_TREEWEIGHT

#define DES_ALPHA_TREEWEIGHT 0.65

Definition at line 127 of file event_estim.c.

◆ DES_BETA_TREEWEIGHT

#define DES_BETA_TREEWEIGHT 0.15

Definition at line 128 of file event_estim.c.

◆ DES_ALPHA_GAP

#define DES_ALPHA_GAP 0.6

Definition at line 130 of file event_estim.c.

◆ DES_BETA_GAP

#define DES_BETA_GAP 0.15

Definition at line 131 of file event_estim.c.

◆ DES_ALPHA_LEAFFREQUENCY

#define DES_ALPHA_LEAFFREQUENCY 0.3

Definition at line 133 of file event_estim.c.

◆ DES_BETA_LEAFFREQUENCY

#define DES_BETA_LEAFFREQUENCY 0.33

Definition at line 134 of file event_estim.c.

◆ DES_ALPHA_SSG

#define DES_ALPHA_SSG 0.6

Definition at line 136 of file event_estim.c.

◆ DES_BETA_SSG

#define DES_BETA_SSG 0.15

Definition at line 137 of file event_estim.c.

◆ DES_ALPHA_OPENNODES

#define DES_ALPHA_OPENNODES 0.6

Definition at line 139 of file event_estim.c.

◆ DES_BETA_OPENNODES

#define DES_BETA_OPENNODES 0.15

Definition at line 140 of file event_estim.c.

◆ MAX_REGFORESTSIZE

#define MAX_REGFORESTSIZE 10000000

size limit (number of nodes) for regression forest

Definition at line 142 of file event_estim.c.

◆ COMPLETIONTYPE_AUTO

#define COMPLETIONTYPE_AUTO 'a'

automatic (regression forest if available, else monotone regression on binary and SSG on nonbinary trees)

Definition at line 147 of file event_estim.c.

◆ COMPLETIONTYPE_REGFOREST

#define COMPLETIONTYPE_REGFOREST 'r'

regression forest (must be provided by user)

Definition at line 148 of file event_estim.c.

◆ COMPLETIONTYPE_MONOREG

#define COMPLETIONTYPE_MONOREG 'm'

monotone regression (using tree weight and SSG)

Definition at line 149 of file event_estim.c.

◆ COMPLETIONTYPE_TREEWEIGHT

#define COMPLETIONTYPE_TREEWEIGHT 'w'

use tree weight value as approximation of search tree completion

Definition at line 150 of file event_estim.c.

◆ COMPLETIONTYPE_SSG

#define COMPLETIONTYPE_SSG 's'

use SSG value as approximation of search tree completion

Definition at line 151 of file event_estim.c.

◆ COMPLETIONTYPE_GAP

#define COMPLETIONTYPE_GAP 'g'

use gap value as approximation of search tree completion

Definition at line 152 of file event_estim.c.

◆ ESTIMMETHOD_COMPL

#define ESTIMMETHOD_COMPL 'c'

estimation based on projection of current search completion

Definition at line 156 of file event_estim.c.

◆ ESTIMMETHOD_WBE

#define ESTIMMETHOD_WBE 'b'

weighted backtrack estimation

Definition at line 157 of file event_estim.c.

◆ ESTIMMETHOD_ENSMBL

#define ESTIMMETHOD_ENSMBL 'e'

estimation based on an ensemble of the individual estimations

Definition at line 158 of file event_estim.c.

◆ ESTIMMETHOD_GAP

#define ESTIMMETHOD_GAP 'g'

estimation based on double exponential smoothing for open nodes

Definition at line 159 of file event_estim.c.

◆ ESTIMMETHOD_LFREQ

#define ESTIMMETHOD_LFREQ 'l'

estimation based on double exponential smoothing for leaf frequency

Definition at line 160 of file event_estim.c.

◆ ESTIMMETHOD_OPEN

#define ESTIMMETHOD_OPEN 'o'

estimation based on double exponential smoothing for open nodes

Definition at line 161 of file event_estim.c.

◆ ESTIMMETHOD_SSG

#define ESTIMMETHOD_SSG 's'

estimation based on double exponential smoothing for sum of subtree gaps

Definition at line 162 of file event_estim.c.

◆ ESTIMMETHOD_TPROF

#define ESTIMMETHOD_TPROF 't'

estimation based on tree profile method

Definition at line 163 of file event_estim.c.

◆ ESTIMMETHOD_TREEWEIGHT

#define ESTIMMETHOD_TREEWEIGHT 'w'

estimation based on double exponential smoothing for tree weight

Definition at line 164 of file event_estim.c.

◆ ESTIMMETHODS

#define ESTIMMETHODS "bceglostw"

Definition at line 166 of file event_estim.c.

◆ TREEPROFILE_MINSIZE

#define TREEPROFILE_MINSIZE 512

minimum size (depth) that tree profile can hold

Definition at line 169 of file event_estim.c.

◆ SSG_STARTPRIMBOUND

#define SSG_STARTPRIMBOUND SCIP_INVALID

initial value of primal bound used within SSG

Definition at line 170 of file event_estim.c.

◆ NTIMESERIES

#define NTIMESERIES 5

Definition at line 199 of file event_estim.c.

◆ DEFAULT_USELEAFTS

#define DEFAULT_USELEAFTS TRUE

Use leaf nodes as basic observations for time series, or all nodes?

Definition at line 242 of file event_estim.c.

◆ DEFAULT_REPORTFREQ

#define DEFAULT_REPORTFREQ -1

report frequency on estimation: -1: never, 0: always, k >= 1: k times evenly during search

Definition at line 243 of file event_estim.c.

◆ DEFAULT_REGFORESTFILENAME

#define DEFAULT_REGFORESTFILENAME "-"

default file name of user regression forest in RFCSV format

Definition at line 244 of file event_estim.c.

◆ DEFAULT_COEFMONOWEIGHT

#define DEFAULT_COEFMONOWEIGHT 0.3667

coefficient of tree weight in monotone approximation of search completion

Definition at line 245 of file event_estim.c.

◆ DEFAULT_COEFMONOSSG

#define DEFAULT_COEFMONOSSG 0.6333

coefficient of 1 - SSG in monotone approximation of search completion

Definition at line 246 of file event_estim.c.

◆ DEFAULT_COMPLETIONTYPE

#define DEFAULT_COMPLETIONTYPE COMPLETIONTYPE_AUTO

default computation of search tree completion

Definition at line 247 of file event_estim.c.

◆ DEFAULT_ESTIMMETHOD

#define DEFAULT_ESTIMMETHOD ESTIMMETHOD_TREEWEIGHT

default tree size estimation method: (c)ompletion, (e)nsemble, time series forecasts on either (g)ap, (l)eaf frequency, (o)open nodes, tree (w)eight, (s)sg, or (t)ree profile or w(b)e

Definition at line 250 of file event_estim.c.

◆ DEFAULT_TREEPROFILE_ENABLED

#define DEFAULT_TREEPROFILE_ENABLED FALSE

Should the event handler collect data?

Definition at line 251 of file event_estim.c.

◆ DEFAULT_TREEPROFILE_MINNODESPERDEPTH

#define DEFAULT_TREEPROFILE_MINNODESPERDEPTH 20.0

minimum average number of nodes at each depth before producing estimations

Definition at line 252 of file event_estim.c.

◆ DEFAULT_RESTARTPOLICY

#define DEFAULT_RESTARTPOLICY 'e'

default restart policy: (a)lways, (c)ompletion, (e)stimation, (n)ever

Definition at line 253 of file event_estim.c.

◆ DEFAULT_RESTARTLIMIT

#define DEFAULT_RESTARTLIMIT 1

default restart limit

Definition at line 254 of file event_estim.c.

◆ DEFAULT_MINNODES

#define DEFAULT_MINNODES 1000L

minimum number of nodes before restart

Definition at line 255 of file event_estim.c.

◆ DEFAULT_COUNTONLYLEAVES

#define DEFAULT_COUNTONLYLEAVES FALSE

should only leaves count for the minnodes parameter?

Definition at line 256 of file event_estim.c.

◆ DEFAULT_RESTARTFACTOR

#define DEFAULT_RESTARTFACTOR 50.0

factor by which the estimated number of nodes should exceed the current number of nodes

Definition at line 257 of file event_estim.c.

◆ DEFAULT_RESTARTNONLINEAR

#define DEFAULT_RESTARTNONLINEAR FALSE

whether to apply a restart when nonlinear constraints are present

Definition at line 258 of file event_estim.c.

◆ DEFAULT_RESTARTACTPRICERS

#define DEFAULT_RESTARTACTPRICERS FALSE

whether to apply a restart when active pricers are used

Definition at line 259 of file event_estim.c.

◆ DEFAULT_HITCOUNTERLIM

#define DEFAULT_HITCOUNTERLIM 50

limit on the number of successive samples to really trigger a restart

Definition at line 260 of file event_estim.c.

◆ DEFAULT_SSG_NMAXSUBTREES

#define DEFAULT_SSG_NMAXSUBTREES -1

the maximum number of individual SSG subtrees; the old split is kept if a new split exceeds this number of subtrees ; -1: no limit

Definition at line 262 of file event_estim.c.

◆ DEFAULT_SSG_NMINNODESLASTSPLIT

#define DEFAULT_SSG_NMINNODESLASTSPLIT 0L

minimum number of nodes to process between two consecutive SSG splits

Definition at line 263 of file event_estim.c.

◆ DEFAULT_SHOWSTATS

#define DEFAULT_SHOWSTATS FALSE

should statistics be shown at the end?

Definition at line 264 of file event_estim.c.

◆ DECL_TIMESERIESUPDATE

#define DECL_TIMESERIESUPDATE ( x )

Value:

   SCIP_RETCODE x (\
   SCIP*                 scip,                   \
   TIMESERIES*           ts,                     \
   TREEDATA*             treedata,               \
   SCIP_Real*            value                   \
   )

update callback of time series

Definition at line 330 of file event_estim.c.

Typedef Documentation

◆ RESTARTPOLICY

typedef enum RestartPolicy RESTARTPOLICY

Definition at line 99 of file event_estim.c.

◆ DOUBLEEXPSMOOTH

typedef struct DoubleExpSmooth DOUBLEEXPSMOOTH

Definition at line 183 of file event_estim.c.

◆ TIMESERIES

typedef struct TimeSeries TIMESERIES

time series data structure for leaf time series

These time series are the basic ingredient for tree size estimation via forecasting.

This general class represents concrete time series such as the closed gap, tree weight, and leaf frequency. Through callbacks for data (de-)initialization and value queries, it provides a common interface to which double exponential smoothing or window forecasts can be applied.

Definition at line 193 of file event_estim.c.

◆ TREEDATA

typedef struct TreeData TREEDATA

data structure for convenient access of tree information

Definition at line 196 of file event_estim.c.

◆ TSPOS

typedef enum TsPos TSPOS

Definition at line 212 of file event_estim.c.

◆ SCIP_REGFOREST

typedef struct SCIP_RegForest SCIP_REGFOREST

regression forest data structure

Definition at line 215 of file event_estim.c.

◆ TREEPROFILESTATS

typedef struct TreeProfileStats TREEPROFILESTATS

Definition at line 226 of file event_estim.c.

◆ TREEPROFILE

typedef struct TreeProfile TREEPROFILE

Definition at line 239 of file event_estim.c.

◆ SUBTREESUMGAP

typedef struct SubtreeSumGap SUBTREESUMGAP

Definition at line 302 of file event_estim.c.

◆ NODEINFO

typedef struct NodeInfo NODEINFO

Definition at line 364 of file event_estim.c.

Enumeration Type Documentation

◆ RestartPolicy

enum RestartPolicy

enumerator for available restart policies

Enumerator
RESTARTPOLICY_NEVER	never restart (disable this event handler)
RESTARTPOLICY_ALWAYS	always restart (can be fine tuned by using minimum number of nodes and restart limit)
RESTARTPOLICY_ESTIMATION	base restart on the estimation method
RESTARTPOLICY_COMPLETION	trigger restart based on search completion approximation

Definition at line 91 of file event_estim.c.

◆ TsPos

enum TsPos

time series position in event handler time series array

Enumerator
TSPOS_NONE	invalid array position
TSPOS_GAP	time series position of gap
TSPOS_TREEWEIGHT	time series position of tree weight
TSPOS_LFREQ	time series position of leaf frequency
TSPOS_SSG	time series position of SSG
TSPOS_OPEN	time series position of open nodes

Definition at line 202 of file event_estim.c.

Function Documentation

◆ real2String()

static char * real2String	(	SCIP_Real	num,
		char *	buf,
		int	digits
	)

static

convert number to string and treat SCIP_INVALID as '-'

Parameters

num	number to convert to string
buf	string buffer
digits	number of decimal digits

Definition at line 383 of file event_estim.c.

References SCIP_INVALID, SCIP_MAXSTRLEN, and SCIPsnprintf().

Referenced by printReport().

◆ SCIPregForestFree()

static void SCIPregForestFree ( SCIP_REGFOREST ** regforest )

static

free a regression forest data structure

Parameters

regforest regression forest data structure

Definition at line 401 of file event_estim.c.

References BMSfreeMemory, BMSfreeMemoryArrayNull, SCIP_RegForest::child, SCIP_RegForest::nbegin, NULL, SCIP_RegForest::splitidx, and SCIP_RegForest::value.

Referenced by SCIP_DECL_EVENTEXIT(), and SCIPregForestFromFile().

◆ SCIPregForestPredict()

static SCIP_Real SCIPregForestPredict	(	SCIP_REGFOREST *	regforest,
		SCIP_Real *	datapoint
	)

static

make a prediction with regression forest

Parameters

regforest	regression forest data structure
datapoint	a data point that matches the dimension of this regression forest

Definition at line 423 of file event_estim.c.

References SCIP_RegForest::child, SCIP_RegForest::dim, SCIP_RegForest::nbegin, SCIP_RegForest::ntrees, NULL, SCIP_Real, SCIPdebugMessage, SCIP_RegForest::splitidx, and SCIP_RegForest::value.

Referenced by getSearchCompletion().

◆ SCIPregForestFromFile()

static SCIP_RETCODE SCIPregForestFromFile	(	SCIP_REGFOREST **	regforest,
		const char *	filename
	)

static

read a regression forest from an rfcsv file

TODO improve this parser to better capture wrong user input, e.g., if the dimension is wrong

Parameters

regforest	regression forest data structure
filename	name of file with the regression forest data

Definition at line 470 of file event_estim.c.

References BMSallocMemory, BMSallocMemoryArray, BMSclearMemory, SCIP_RegForest::child, SCIP_RegForest::dim, FALSE, MAX_REGFORESTSIZE, SCIP_RegForest::nbegin, SCIP_RegForest::ntrees, NULL, SCIP_ALLOC_TERMINATE, SCIP_Bool, SCIP_INVALIDDATA, SCIP_MAXSTRLEN, SCIP_NOFILE, SCIP_NOMEMORY, SCIP_OKAY, SCIPdebugMessage, SCIPerrorMessage, SCIPfclose(), SCIPfeof(), SCIPfgets(), SCIPfopen(), SCIPregForestFree(), SCIPsnprintf(), SCIPstrToRealValue(), SCIP_RegForest::size, SCIP_RegForest::splitidx, TRUE, and SCIP_RegForest::value.

Referenced by SCIP_DECL_EVENTINIT().

◆ isEqualTreeProfileStats()

static SCIP_Bool isEqualTreeProfileStats	(	TREEPROFILESTATS *	stats,
		TREEPROFILESTATS *	other
	)

static

compare two tree profile statistics for equality

Parameters

stats	first tree profile statistics
other	other tree profile statistics

Definition at line 607 of file event_estim.c.

References TreeProfileStats::lastfulldepth, TreeProfileStats::maxdepth, TreeProfileStats::maxwaistdepth, TreeProfileStats::minwaistdepth, and NULL.

Referenced by predictTotalSizeTreeProfile().

◆ copyTreeProfileStats()

static void copyTreeProfileStats	(	TREEPROFILESTATS *	dest,
		TREEPROFILESTATS *	src
	)

static

copy source tree profile into destination

Parameters

dest	destination tree profile statistics
src	source tree profile statistics

Definition at line 623 of file event_estim.c.

References TreeProfileStats::lastfulldepth, TreeProfileStats::maxdepth, TreeProfileStats::maxwaistdepth, TreeProfileStats::minwaistdepth, and NULL.

Referenced by predictTotalSizeTreeProfile().

◆ resetTreeProfileStats()

static void resetTreeProfileStats ( TREEPROFILESTATS * treeprofilestats )

static

reset tree profile statistics

Parameters

treeprofilestats tree profile statistics

Definition at line 639 of file event_estim.c.

References BMSclearMemory, and NULL.

Referenced by createTreeProfile().

◆ extendMemoryTreeProfile()

static SCIP_RETCODE extendMemoryTreeProfile	(	SCIP *	scip,
		TREEPROFILE *	treeprofile,
		int	mindepth
	)

static

extend tree profile to deeper tree

Parameters

scip	SCIP data structure
treeprofile	tree profile data structure
mindepth	minimum depth that the tree profile should hold

Definition at line 651 of file event_estim.c.

References BMSclearMemoryArray, NULL, TreeProfile::profile, TreeProfile::profilesize, SCIP_CALL, SCIP_Longint, SCIP_OKAY, SCIPallocClearMemoryArray, SCIPcalcMemGrowSize(), and SCIPreallocMemoryArray.

Referenced by createTreeProfile(), and updateTreeProfile().

◆ createTreeProfile()

static SCIP_RETCODE createTreeProfile	(	SCIP *	scip,
		TREEPROFILE **	treeprofile
	)

static

create a tree profile

Parameters

scip	SCIP data structure
treeprofile	pointer to store tree profile data structure

Definition at line 686 of file event_estim.c.

References extendMemoryTreeProfile(), NULL, resetTreeProfileStats(), SCIP_CALL, SCIP_OKAY, SCIPallocMemory, and TREEPROFILE_MINSIZE.

Referenced by SCIP_DECL_EVENTINITSOL().

◆ freeTreeProfile()

static void freeTreeProfile	(	SCIP *	scip,
		TREEPROFILE **	treeprofile
	)

static

free a tree profile

Parameters

scip	SCIP data structure
treeprofile	pointer to tree profile data structure

Definition at line 710 of file event_estim.c.

References NULL, SCIPfreeMemory, and SCIPfreeMemoryArray.

Referenced by SCIP_DECL_EVENTEXITSOL().

◆ updateTreeProfile()

static SCIP_RETCODE updateTreeProfile	(	SCIP *	scip,
		TREEPROFILE *	treeprofile,
		SCIP_NODE *	node
	)

static

update tree profile

Parameters

scip	SCIP data structure
treeprofile	tree profile data structure
node	node that should be added to the profile

Definition at line 730 of file event_estim.c.

References extendMemoryTreeProfile(), TreeProfileStats::lastfulldepth, TreeProfileStats::maxdepth, TreeProfileStats::maxwaistdepth, TreeProfileStats::minwaistdepth, NULL, TreeProfile::profile, SCIP_CALL, SCIP_Longint, SCIP_LONGINT_FORMAT, SCIP_OKAY, SCIPdebugMsg, SCIPnodeGetDepth(), and TreeProfile::stats.

Referenced by SCIP_DECL_EVENTEXEC().

◆ predictTotalSizeTreeProfile()

static SCIP_Real predictTotalSizeTreeProfile	(	SCIP *	scip,
		TREEPROFILE *	treeprofile,
		SCIP_Real	minnodesperdepth
	)

static

make a prediction of the total tree size based on the current tree profile

Parameters

scip	SCIP data structure
treeprofile	tree profile data structure
minnodesperdepth	minimum number of average nodes per depth to make a prediction

Definition at line 799 of file event_estim.c.

References copyTreeProfileStats(), isEqualTreeProfileStats(), TreeProfile::lastestimate, TreeProfile::lastestimatestats, TreeProfileStats::lastfulldepth, TreeProfileStats::maxdepth, TreeProfileStats::maxwaistdepth, TreeProfileStats::minwaistdepth, NULL, SCIP_Real, SCIPdebugMsg, SCIPgetNNodes(), and TreeProfile::stats.

Referenced by printReport(), and SCIPgetTreesizeEstimation().

◆ subtreeSumGapDelSubtrees()

static void subtreeSumGapDelSubtrees	(	SCIP *	scip,
		SUBTREESUMGAP *	ssg
	)

static

clean subtrees stored as priority queues

Parameters

scip	SCIP data structure
ssg	subtree sum gap data structure

Definition at line 871 of file event_estim.c.

References SubtreeSumGap::nsubtrees, NULL, SCIPfreeBlockMemory, SCIPfreeBlockMemoryArray, SCIPpqueueElems(), SCIPpqueueFree(), SCIPpqueueNElems(), and SubtreeSumGap::subtreepqueues.

Referenced by subtreeSumGapFree(), subtreeSumGapReset(), and subtreeSumGapSplit().

◆ subtreeSumGapReset()

static SCIP_RETCODE subtreeSumGapReset	(	SCIP *	scip,
		SUBTREESUMGAP *	ssg
	)

static

reset subtree sum gap

Parameters

scip	SCIP data structure
ssg	subtree sum gap data structure

Definition at line 911 of file event_estim.c.

References SubtreeSumGap::nodelastsplit, SubtreeSumGap::nodes2info, SubtreeSumGap::nsubtrees, NULL, SubtreeSumGap::pblastsplit, SubtreeSumGap::scalingfactor, SCIP_CALL, SCIP_OKAY, SCIPhashmapRemoveAll(), SSG_STARTPRIMBOUND, SubtreeSumGap::subtreepqueues, subtreeSumGapDelSubtrees(), and SubtreeSumGap::value.

Referenced by resetTreeData(), and subtreeSumGapCreate().

◆ subtreeSumGapCreate()

static SCIP_RETCODE subtreeSumGapCreate	(	SCIP *	scip,
		SUBTREESUMGAP **	ssg
	)

static

create a subtree sum gap

Parameters

scip	SCIP data structure
ssg	pointer to store subtree sum gap data structure

Definition at line 935 of file event_estim.c.

References INITIALSIZE, NULL, SCIP_CALL, SCIP_OKAY, SCIPallocMemory, SCIPblkmem(), SCIPhashmapCreate(), and subtreeSumGapReset().

Referenced by createTreeData().

◆ subtreeSumGapFree()

static void subtreeSumGapFree	(	SCIP *	scip,
		SUBTREESUMGAP **	ssg
	)

static

free a subtree sum gap

Parameters

scip	SCIP data structure
ssg	pointer to store subtree sum gap data structure

Definition at line 958 of file event_estim.c.

References NULL, SCIPfreeMemory, SCIPhashmapFree(), and subtreeSumGapDelSubtrees().

Referenced by freeTreeData().

◆ SCIP_DECL_SORTPTRCOMP()

static SCIP_DECL_SORTPTRCOMP ( compareNodeInfos )

static

compare two node infos by comparing their lower bound

Definition at line 981 of file event_estim.c.

References NodeInfo::lowerbound.

◆ SCIP_DECL_PQUEUEELEMCHGPOS()

static SCIP_DECL_PQUEUEELEMCHGPOS ( elemChgPosNodeInfo )

static

position change callback of element in priority queue

Definition at line 996 of file event_estim.c.

References NodeInfo::pos.

◆ subtreeSumGapStoreNode()

static SCIP_RETCODE subtreeSumGapStoreNode	(	SCIP *	scip,
		SUBTREESUMGAP *	ssg,
		SCIP_NODE *	node,
		int	subtreeidx
	)

static

store node in SSG data structure

Parameters

scip	SCIP data structure
ssg	subtree sum gap data structure
node	node that should be stored
subtreeidx	subtree index of that node

Definition at line 1006 of file event_estim.c.

References NodeInfo::lowerbound, NodeInfo::node, SubtreeSumGap::nodes2info, NULL, NodeInfo::pos, SCIP_CALL, SCIP_LONGINT_FORMAT, SCIP_OKAY, SCIPallocBlockMemory, SCIPdebugMsg, SCIPhashmapExists(), SCIPhashmapInsert(), SCIPnodeGetLowerbound(), SCIPnodeGetNumber(), SCIPpqueueCreate(), SCIPpqueueElems(), SCIPpqueueInsert(), SCIPpqueueNElems(), NodeInfo::subtreeidx, and SubtreeSumGap::subtreepqueues.

Referenced by subtreeSumGapInsertChildren(), and subtreeSumGapSplit().

◆ subtreeSumGapSplit()

static SCIP_RETCODE subtreeSumGapSplit	(	SCIP *	scip,
		SUBTREESUMGAP *	ssg,
		SCIP_Bool	addfocusnode
	)

static

split the open nodes of the current tree

Parameters

scip	SCIP data structure
ssg	subtree sum gap data structure
addfocusnode	should the focus node be a subtree, too?

Definition at line 1055 of file event_estim.c.

References nnodes, SubtreeSumGap::nodes2info, SubtreeSumGap::nsubtrees, NULL, SCIP_CALL, SCIP_OKAY, SCIPallocClearBlockMemoryArray, SCIPdebugMsg, SCIPgetFocusNode(), SCIPgetOpenNodesData(), SCIPhashmapRemoveAll(), SubtreeSumGap::subtreepqueues, subtreeSumGapDelSubtrees(), and subtreeSumGapStoreNode().

Referenced by subtreeSumGapUpdate().

◆ calcGap()

static SCIP_Real calcGap	(	SCIP *	scip,
		SCIP_Real	lowerbound
	)

static

compute a gap between a lower bound and the current upper bound

Parameters

scip	SCIP data structure
lowerbound	lower bound value

Definition at line 1123 of file event_estim.c.

References MAX, MIN, REALABS, SCIP_Real, SCIPgetPrimalbound(), SCIPgetUpperbound(), SCIPisEQ(), SCIPisInfinity(), and SCIPretransformObj().

Referenced by subtreeSumGapComputeFromScratchEfficiently(), and subtreeSumGapRemoveNode().

◆ subtreeSumGapRemoveNode()

static SCIP_RETCODE subtreeSumGapRemoveNode	(	SCIP *	scip,
		SUBTREESUMGAP *	ssg,
		SCIP_NODE *	node
	)

static

remove node from the subtree sum gap (because it has been solved by branching or is a leaf)

Parameters

scip	SCIP data structure
ssg	subtree sum gap data structure
node	node that should be removed

Definition at line 1156 of file event_estim.c.

References calcGap(), NodeInfo::lowerbound, MIN, SubtreeSumGap::nodes2info, SubtreeSumGap::nsubtrees, NULL, NodeInfo::pos, SubtreeSumGap::scalingfactor, SCIP_CALL, SCIP_LONGINT_FORMAT, SCIP_OKAY, SCIP_Real, SCIPdebugMsg, SCIPfreeBlockMemory, SCIPhashmapGetImage(), SCIPhashmapRemove(), SCIPinfinity(), SCIPisLE(), SCIPnodeGetNumber(), SCIPnodeGetParent(), SCIPpqueueDelPos(), SCIPpqueueElems(), SCIPpqueueFirst(), SCIPpqueueNElems(), NodeInfo::subtreeidx, SubtreeSumGap::subtreepqueues, and SubtreeSumGap::value.

Referenced by subtreeSumGapInsertChildren(), and subtreeSumGapUpdate().

◆ subtreeSumGapInsertChildren()

static SCIP_RETCODE subtreeSumGapInsertChildren	(	SCIP *	scip,
		SUBTREESUMGAP *	ssg
	)

static

insert children into subtree sum gap

Parameters

scip	SCIP data structure
ssg	subtree sum gap data structure

Definition at line 1227 of file event_estim.c.

References SubtreeSumGap::nodes2info, SubtreeSumGap::nsubtrees, NULL, SCIP_CALL, SCIP_LONGINT_FORMAT, SCIP_OKAY, SCIPdebugMsg, SCIPgetChildren(), SCIPgetFocusNode(), SCIPhashmapExists(), SCIPhashmapGetImage(), SCIPnodeGetNumber(), SCIPnodeGetParent(), NodeInfo::subtreeidx, subtreeSumGapRemoveNode(), and subtreeSumGapStoreNode().

Referenced by subtreeSumGapUpdate().

◆ subtreeSumGapComputeFromScratchEfficiently()

static SCIP_RETCODE subtreeSumGapComputeFromScratchEfficiently	(	SCIP *	scip,
		SUBTREESUMGAP *	ssg,
		SCIP_Bool	updatescaling
	)

static

compute subtree sum gap from scratch efficiently (linear effort in the number of subtrees)

Parameters

scip	SCIP data structure
ssg	subtree sum gap data structure
updatescaling	should the scaling factor be updated?

Definition at line 1392 of file event_estim.c.

References calcGap(), NodeInfo::lowerbound, MAX, SubtreeSumGap::nsubtrees, NULL, SubtreeSumGap::scalingfactor, SCIP_OKAY, SCIP_Real, SCIPgetLowerbound(), SCIPgetUpperbound(), SCIPisInfinity(), SCIPpqueueFirst(), SubtreeSumGap::subtreepqueues, and SubtreeSumGap::value.

Referenced by subtreeSumGapUpdate().

◆ subtreeSumGapUpdate()

static SCIP_RETCODE subtreeSumGapUpdate	(	SCIP *	scip,
		SUBTREESUMGAP *	ssg,
		SCIP_NODE *	node,
		int	nchildren,
		SCIP_Longint	nsolvednodes
	)

static

update the subtree sum gap after a node event (branching or deletion of a node)

Parameters

scip	SCIP data structure
ssg	subtree sum gap data structure
node	the corresponding node
nchildren	number of children
nsolvednodes	number of solved nodes so far, used as a time stamp

Definition at line 1449 of file event_estim.c.

References FALSE, SubtreeSumGap::nmaxsubtrees, SubtreeSumGap::nminnodeslastsplit, SubtreeSumGap::nodelastsplit, SubtreeSumGap::nsubtrees, NULL, SubtreeSumGap::pblastsplit, SCIP_Bool, SCIP_CALL, SCIP_LONGINT_FORMAT, SCIP_OKAY, SCIP_STAGE_INITSOLVE, SCIP_STAGE_SOLVED, SCIPdebugMsg, SCIPgetFocusNode(), SCIPgetNChildren(), SCIPgetNLeaves(), SCIPgetNSiblings(), SCIPgetPrimalbound(), SCIPgetStage(), SCIPgetUpperbound(), SCIPisEQ(), SCIPisInfinity(), SCIPwasNodeLastBranchParent(), subtreeSumGapComputeFromScratchEfficiently(), subtreeSumGapInsertChildren(), subtreeSumGapRemoveNode(), subtreeSumGapSplit(), TRUE, and SubtreeSumGap::value.

Referenced by updateTreeData().

◆ resetTreeData()

static SCIP_RETCODE resetTreeData	(	SCIP *	scip,
		TREEDATA *	treedata
	)

static

reset tree data

Parameters

scip	SCIP data structure
treedata	tree data

Definition at line 1531 of file event_estim.c.

References TreeData::ninner, TreeData::nleaves, TreeData::nnodes, TreeData::nopen, TreeData::nvisited, SCIP_CALL, SCIP_OKAY, TreeData::ssg, subtreeSumGapReset(), and TreeData::weight.

Referenced by createTreeData(), and SCIP_DECL_EVENTINITSOL().

◆ createTreeData()

static SCIP_RETCODE createTreeData	(	SCIP *	scip,
		TREEDATA **	treedata
	)

static

create tree data structure

Parameters

scip	SCIP data structure
treedata	pointer to store tree data

Definition at line 1551 of file event_estim.c.

References NULL, resetTreeData(), SCIP_CALL, SCIP_OKAY, SCIPallocMemory, and subtreeSumGapCreate().

Referenced by SCIPincludeEventHdlrEstim().

◆ freeTreeData()

static void freeTreeData	(	SCIP *	scip,
		TREEDATA **	treedata
	)

static

free tree data structure

Parameters

scip	SCIP data structure
treedata	pointer to tree data

Definition at line 1570 of file event_estim.c.

References NULL, SCIPfreeMemory, and subtreeSumGapFree().

Referenced by SCIP_DECL_EVENTFREE(), and SCIPincludeEventHdlrEstim().

◆ updateTreeData()

static SCIP_RETCODE updateTreeData	(	SCIP *	scip,
		TREEDATA *	treedata,
		SCIP_NODE *	node,
		int	nchildren
	)

static

update tree data structure after a node has been solved/is about to be deleted

Parameters

scip	SCIP data structure
treedata	tree data
node	the corresponding node
nchildren	the number of children

Definition at line 1588 of file event_estim.c.

References TreeData::ninner, TreeData::nleaves, TreeData::nnodes, TreeData::nopen, NULL, TreeData::nvisited, SCIP_CALL, SCIP_OKAY, SCIP_Real, SCIPisInRestart(), SCIPnodeGetDepth(), TreeData::ssg, subtreeSumGapUpdate(), and TreeData::weight.

Referenced by SCIP_DECL_EVENTEXEC().

◆ treeDataGetWbe()

static SCIP_Real treeDataGetWbe ( TREEDATA * treedata )

static

get weighted backtrack estimation from this tree data

Parameters

treedata tree data

Definition at line 1624 of file event_estim.c.

References TreeData::nleaves, SCIP_Real, and TreeData::weight.

Referenced by getEnsembleEstimation(), printReport(), and SCIPgetTreesizeEstimation().

◆ doubleExpSmoothReset()

static void doubleExpSmoothReset	(	DOUBLEEXPSMOOTH *	des,
		SCIP_Real	initialvalue
	)

static

reset double exponential smoothing

Parameters

des	double exponential smoothing data structure
initialvalue	the initial value

Definition at line 1663 of file event_estim.c.

References DoubleExpSmooth::initialvalue, DoubleExpSmooth::level, DoubleExpSmooth::n, SCIP_INVALID, and DoubleExpSmooth::trend.

Referenced by timeSeriesResample(), and timeSeriesReset().

◆ doubleExpSmoothInit()

static void doubleExpSmoothInit	(	DOUBLEEXPSMOOTH *	des,
		SCIP_Real	x1
	)

static

initialize a double exponential smoothing data structure

Parameters

des	double exponential smoothing data structure
x1	the first sample value

Definition at line 1676 of file event_estim.c.

References DES_USETRENDINLEVEL, DoubleExpSmooth::initialvalue, DoubleExpSmooth::level, DoubleExpSmooth::n, NULL, DoubleExpSmooth::trend, and DoubleExpSmooth::usetrendinlevel.

Referenced by doubleExpSmoothUpdate().

◆ doubleExpSmoothUpdate()

static void doubleExpSmoothUpdate	(	DOUBLEEXPSMOOTH *	des,
		SCIP_Real	xnew
	)

static

update a double exponential smoothing data structure

Parameters

des	double exponential smoothing data structure
xnew	new sample value

Definition at line 1694 of file event_estim.c.

References DoubleExpSmooth::alpha, DoubleExpSmooth::beta, doubleExpSmoothInit(), DoubleExpSmooth::level, DoubleExpSmooth::n, SCIP_Real, DoubleExpSmooth::trend, and DoubleExpSmooth::usetrendinlevel.

Referenced by timeSeriesResample(), and timeSeriesUpdate().

◆ doubleExpSmoothGetTrend()

static SCIP_Real doubleExpSmoothGetTrend ( DOUBLEEXPSMOOTH * des )

static

get the current trend (slope) computed by this double exponential smoothing

Parameters

des	double exponential smoothing data structure

Definition at line 1716 of file event_estim.c.

References DoubleExpSmooth::n, NULL, SCIP_INVALID, and DoubleExpSmooth::trend.

Referenced by getSearchCompletion(), printReport(), and timeSeriesEstimate().

◆ timeSeriesReset()

static void timeSeriesReset ( TIMESERIES * timeseries )

static

reset time series

Parameters

timeseries pointer to store time series

Definition at line 1730 of file event_estim.c.

References TimeSeries::currentvalue, TimeSeries::des, doubleExpSmoothReset(), TimeSeries::initialvalue, TimeSeries::nobs, TimeSeries::nvals, TimeSeries::resolution, SCIP_INVALID, and TimeSeries::smoothestimation.

Referenced by resetTimeSeries(), and timeSeriesCreate().

◆ timeSeriesCreate()

static SCIP_RETCODE timeSeriesCreate	(	SCIP *	scip,
		TIMESERIES **	timeseries,
		const char *	name,
		SCIP_Real	targetvalue,
		SCIP_Real	initialvalue,
		SCIP_Real	alpha,
		SCIP_Real	beta,
		DECL_TIMESERIESUPDATE((*timeseriesupdate))
	)

static

create a time series object

Parameters

scip	SCIP data structure
timeseries	pointer to store time series
name	name of this time series
targetvalue	target value of this time series
initialvalue	the initial value of time series
alpha	alpha parameter (level weight) for double exponential smoothing
beta	beta parameter (level weight) for double exponential smoothing

Definition at line 1745 of file event_estim.c.

References DoubleExpSmooth::alpha, DoubleExpSmooth::beta, BMSduplicateMemoryArray, TimeSeries::des, TimeSeries::estimation, TimeSeries::initialvalue, TimeSeries::name, NULL, SCIP_ALLOC, SCIP_CALL, SCIP_OKAY, SCIPallocMemory, SCIPallocMemoryArray, SCIPdebugMsg, TimeSeries::targetvalue, timeSeriesReset(), TimeSeries::vals, and TimeSeries::valssize.

Referenced by includeTimeseries().

◆ timeSeriesFree()

static void timeSeriesFree	(	SCIP *	scip,
		TIMESERIES **	timeseries
	)

static

free a time series

Parameters

scip	SCIP data structure
timeseries	pointer to time series

Definition at line 1794 of file event_estim.c.

References BMSfreeMemoryArray, NULL, SCIPfreeMemory, and SCIPfreeMemoryArray.

Referenced by freeTimeSeries().

◆ timeSeriesGetValue()

static SCIP_Real timeSeriesGetValue ( TIMESERIES * timeseries )

static

get current value of time series

Parameters

timeseries time series

Definition at line 1814 of file event_estim.c.

References TimeSeries::currentvalue, and NULL.

Referenced by DECL_TIMESERIESUPDATE(), getSearchCompletion(), printReport(), timeSeriesEstimate(), and updateTimeseries().

◆ timeSeriesGetTargetValue()

static SCIP_Real timeSeriesGetTargetValue ( TIMESERIES * timeseries )

static

get target value (which this time series reaches at the end of the solution process)

Parameters

timeseries time series

Definition at line 1825 of file event_estim.c.

References TimeSeries::targetvalue.

Referenced by timeSeriesEstimate().

◆ timeSeriesGetResolution()

static int timeSeriesGetResolution ( TIMESERIES * timeseries )

static

get resolution of time series

Parameters

timeseries time series

Definition at line 1834 of file event_estim.c.

References TimeSeries::resolution.

Referenced by printReport(), and timeSeriesEstimate().

◆ timeSeriesEstimate()

static SCIP_Real timeSeriesEstimate	(	TIMESERIES *	timeseries,
		TREEDATA *	treedata
	)

static

estimate tree size at which time series reaches target value

Parameters

timeseries	time series
treedata	tree data for fallback estimation

Definition at line 1843 of file event_estim.c.

References TimeSeries::des, doubleExpSmoothGetTrend(), EPSZ, TreeData::nnodes, TimeSeries::nobs, TimeSeries::nvals, TreeData::nvisited, SCIP_Real, timeSeriesGetResolution(), timeSeriesGetTargetValue(), timeSeriesGetValue(), and TimeSeries::useleafts.

Referenced by getEnsembleEstimation(), printReport(), SCIPgetTreesizeEstimation(), and timeSeriesUpdate().

◆ timeSeriesUpdateSmoothEstimation()

static void timeSeriesUpdateSmoothEstimation	(	TIMESERIES *	timeseries,
		SCIP_Real	estimation
	)

static

update time series smoothened estimation

Parameters

timeseries	time series
estimation	estimation value

Definition at line 1882 of file event_estim.c.

References SCIP_INVALID, SESCOEFF, and TimeSeries::smoothestimation.

Referenced by timeSeriesResample(), and timeSeriesUpdate().

◆ timeSeriesGetSmoothEstimation()

static SCIP_Real timeSeriesGetSmoothEstimation ( TIMESERIES * timeseries )

static

get smooth estimation of time series

Parameters

timeseries time series

Definition at line 1898 of file event_estim.c.

References TimeSeries::smoothestimation.

Referenced by printReport().

◆ timeSeriesResample()

static void timeSeriesResample ( TIMESERIES * timeseries )

static

resample to lower resolution

Parameters

timeseries time series

Definition at line 1907 of file event_estim.c.

References TimeSeries::des, doubleExpSmoothReset(), doubleExpSmoothUpdate(), TimeSeries::estimation, TimeSeries::initialvalue, TimeSeries::nvals, TimeSeries::resolution, timeSeriesUpdateSmoothEstimation(), and TimeSeries::vals.

Referenced by timeSeriesUpdate().

◆ timeSeriesUpdate()

static SCIP_RETCODE timeSeriesUpdate	(	SCIP *	scip,
		TIMESERIES *	timeseries,
		TREEDATA *	treedata,
		SCIP_Bool	isleaf
	)

static

update time series

Parameters

scip	SCIP data structure
timeseries	time series
treedata	tree data
isleaf	are we at a leaf node?

Definition at line 1934 of file event_estim.c.

References TimeSeries::currentvalue, TimeSeries::des, doubleExpSmoothUpdate(), TimeSeries::estimation, TimeSeries::nobs, NULL, TimeSeries::nvals, TimeSeries::resolution, SCIP_CALL, SCIP_OKAY, SCIP_Real, timeSeriesEstimate(), timeSeriesResample(), timeSeriesUpdateSmoothEstimation(), TimeSeries::useleafts, TimeSeries::vals, and TimeSeries::valssize.

Referenced by updateTimeseries().

◆ timeSeriesGetName()

static char * timeSeriesGetName ( TIMESERIES * timeseries )

static

get name of time series

Parameters

timeseries time series

Definition at line 1983 of file event_estim.c.

References TimeSeries::name.

Referenced by printReport(), and updateTimeseries().

◆ resetTimeSeries()

static void resetTimeSeries ( SCIP_EVENTHDLRDATA * eventhdlrdata )

static

reset all time series

Parameters

eventhdlrdata event handler data

Definition at line 1992 of file event_estim.c.

References NTIMESERIES, NULL, timeSeriesReset(), and TimeSeries::useleafts.

Referenced by SCIP_DECL_EVENTINITSOL().

◆ freeTimeSeries()

static void freeTimeSeries	(	SCIP *	scip,
		SCIP_EVENTHDLRDATA *	eventhdlrdata
	)

static

free all time series

Parameters

scip	SCIP data structure
eventhdlrdata	event handler data

Definition at line 2015 of file event_estim.c.

References NTIMESERIES, NULL, and timeSeriesFree().

Referenced by SCIP_DECL_EVENTFREE().

◆ getEnsembleEstimation()

static SCIP_Real getEnsembleEstimation ( SCIP_EVENTHDLRDATA * eventhdlrdata )

static

get ensemble tree size estimation as a combination of the individual time series estimations

the coefficients have been computed based on a nonlinear fit on a broad set of publicly available MIP instances; please refer to the publication at the top of this file for further details.

Parameters

eventhdlrdata event handler data

Definition at line 2037 of file event_estim.c.

References nnodes, TreeData::nnodes, NTIMESERIES, NULL, SCIP_Real, timeSeriesEstimate(), treeDataGetWbe(), TSPOS_GAP, TSPOS_LFREQ, TSPOS_OPEN, TSPOS_SSG, TSPOS_TREEWEIGHT, and TreeData::weight.

Referenced by SCIPgetTreesizeEstimation().

◆ getSearchCompletion()

static SCIP_RETCODE getSearchCompletion	(	SCIP_EVENTHDLRDATA *	eventhdlrdata,
		SCIP_Real *	completed
	)

static

get approximation of search tree completion depending on the selected method

Parameters

eventhdlrdata	event handler data
completed	pointer to store the search tree completion

Definition at line 2132 of file event_estim.c.

References COMPLETIONTYPE_AUTO, COMPLETIONTYPE_GAP, COMPLETIONTYPE_MONOREG, COMPLETIONTYPE_REGFOREST, COMPLETIONTYPE_SSG, COMPLETIONTYPE_TREEWEIGHT, doubleExpSmoothGetTrend(), NULL, SubtreeSumGap::pblastsplit, SCIP_Bool, SCIP_OKAY, SCIP_PARAMETERWRONGVAL, SCIP_Real, SCIPABORT, SCIPerrorMessage, SCIPregForestPredict(), TreeData::ssg, SSG_STARTPRIMBOUND, timeSeriesGetValue(), TSPOS_GAP, TSPOS_LFREQ, TSPOS_OPEN, TSPOS_SSG, TSPOS_TREEWEIGHT, SubtreeSumGap::value, and TreeData::weight.

Referenced by getEstimCompletion(), printReport(), SCIP_DECL_DISPOUTPUT(), and shouldApplyRestartCompletion().

◆ getEstimCompletion()

static SCIP_RETCODE getEstimCompletion	(	SCIP *	scip,
		SCIP_EVENTHDLRDATA *	eventhdlrdata,
		SCIP_Real *	estim
	)

static

tree size estimation based on search tree completion

Parameters

scip	SCIP data structure
eventhdlrdata	event handler data
estim	pointer to store the estimation value

Definition at line 2218 of file event_estim.c.

References getSearchCompletion(), MIN, SCIP_CALL, SCIP_OKAY, SCIP_Real, and SCIPgetNNodes().

Referenced by SCIPgetTreesizeEstimation().

◆ DECL_TIMESERIESUPDATE() [1/5]

static DECL_TIMESERIESUPDATE ( timeseriesUpdateGap )

static

update callback at nodes

Definition at line 2240 of file event_estim.c.

References MAX, NULL, REALABS, SCIP_OKAY, SCIP_Real, SCIPgetDualbound(), SCIPgetPrimalbound(), SCIPisEQ(), SCIPisInfinity(), SCIPisInRestart(), and timeSeriesGetValue().

◆ DECL_TIMESERIESUPDATE() [2/5]

static DECL_TIMESERIESUPDATE ( timeseriesUpdateTreeWeight )

static

update callback at nodes

Definition at line 2281 of file event_estim.c.

References SCIP_OKAY, SCIP_Real, and TreeData::weight.

◆ DECL_TIMESERIESUPDATE() [3/5]

static DECL_TIMESERIESUPDATE ( timeseriesUpdateLeafFreq )

static

update callback at nodes

Definition at line 2290 of file event_estim.c.

References TreeData::nleaves, TreeData::nvisited, SCIP_OKAY, and SCIP_Real.

◆ DECL_TIMESERIESUPDATE() [4/5]

static DECL_TIMESERIESUPDATE ( timeseriesUpdateSsg )

static

update callback at nodes

Definition at line 2302 of file event_estim.c.

References TreeData::nvisited, SCIP_OKAY, TreeData::ssg, and SubtreeSumGap::value.

◆ DECL_TIMESERIESUPDATE() [5/5]

static DECL_TIMESERIESUPDATE ( timeseriesUpdateOpenNodes )

static

update callback at nodes

Definition at line 2314 of file event_estim.c.

References TreeData::nopen, TreeData::nvisited, SCIP_OKAY, and SCIP_Real.

◆ includeTimeseries()

static SCIP_RETCODE includeTimeseries	(	SCIP *	scip,
		SCIP_EVENTHDLRDATA *	eventhdlrdata
	)

static

include time series to forecast into event handler

Parameters

scip	SCIP data structure
eventhdlrdata	event handler data

Definition at line 2326 of file event_estim.c.

References DES_ALPHA_GAP, DES_ALPHA_LEAFFREQUENCY, DES_ALPHA_OPENNODES, DES_ALPHA_SSG, DES_ALPHA_TREEWEIGHT, DES_BETA_GAP, DES_BETA_LEAFFREQUENCY, DES_BETA_OPENNODES, DES_BETA_SSG, DES_BETA_TREEWEIGHT, NULL, SCIP_CALL, SCIP_OKAY, timeSeriesCreate(), TSPOS_GAP, TSPOS_LFREQ, TSPOS_OPEN, TSPOS_SSG, and TSPOS_TREEWEIGHT.

Referenced by SCIPincludeEventHdlrEstim().

◆ getRestartPolicy()

static RESTARTPOLICY getRestartPolicy ( SCIP_EVENTHDLRDATA * eventhdlrdata )

static

get restartpolicy based on the value of the restart parameter

Parameters

eventhdlrdata event handler data

Definition at line 2359 of file event_estim.c.

References RESTARTPOLICY_ALWAYS, RESTARTPOLICY_CHAR_ALWAYS, RESTARTPOLICY_CHAR_COMPLETION, RESTARTPOLICY_CHAR_ESTIMATION, RESTARTPOLICY_CHAR_NEVER, RESTARTPOLICY_COMPLETION, RESTARTPOLICY_ESTIMATION, RESTARTPOLICY_NEVER, and SCIPerrorMessage.

Referenced by shouldApplyRestart().

◆ isRestartApplicable()

static SCIP_Bool isRestartApplicable	(	SCIP *	scip,
		SCIP_EVENTHDLRDATA *	eventhdlrdata
	)

static

check if a restart is applicable considering limit and threshold user parameters

Parameters

scip	SCIP data structure
eventhdlrdata	event handler data

Definition at line 2383 of file event_estim.c.

References FALSE, nnodes, SCIP_Longint, SCIPgetNActivePricers(), SCIPisNLPConstructed(), and TRUE.

Referenced by SCIP_DECL_EVENTEXEC().

◆ shouldApplyRestartCompletion()

static SCIP_Bool shouldApplyRestartCompletion	(	SCIP *	scip,
		SCIP_EVENTHDLRDATA *	eventhdlrdata
	)

static

should a restart be applied based on the value of the selected completion method?

Parameters

scip	SCIP data structure
eventhdlrdata	event handler data

Definition at line 2416 of file event_estim.c.

References FALSE, getSearchCompletion(), NULL, SCIP_CALL_ABORT, SCIP_Real, SCIP_VERBLEVEL_FULL, SCIPstatistic, SCIPverbMessage(), and TRUE.

Referenced by shouldApplyRestart().

◆ shouldApplyRestartEstimation()

static SCIP_Bool shouldApplyRestartEstimation	(	SCIP *	scip,
		SCIP_EVENTHDLRDATA *	eventhdlrdata
	)

static

should a restart be applied based on the value of the selected completion method?

Parameters

scip	SCIP data structure
eventhdlrdata	event handler data

Definition at line 2442 of file event_estim.c.

References FALSE, NULL, SCIP_LONGINT_FORMAT, SCIP_Real, SCIP_VERBLEVEL_FULL, SCIPgetTreesizeEstimation(), SCIPstatistic, SCIPverbMessage(), and TRUE.

Referenced by shouldApplyRestart().

◆ shouldApplyRestart()

static SCIP_Bool shouldApplyRestart	(	SCIP *	scip,
		SCIP_EVENTHDLRDATA *	eventhdlrdata
	)

static

check if a restart should be performed based on the given restart policy

Parameters

scip	SCIP data structure
eventhdlrdata	event handler data

Definition at line 2479 of file event_estim.c.

References FALSE, getRestartPolicy(), RESTARTPOLICY_ALWAYS, RESTARTPOLICY_COMPLETION, RESTARTPOLICY_ESTIMATION, RESTARTPOLICY_NEVER, SCIP_Bool, shouldApplyRestartCompletion(), shouldApplyRestartEstimation(), and TRUE.

Referenced by SCIP_DECL_EVENTEXEC().

◆ updateTimeseries()

static SCIP_RETCODE updateTimeseries	(	SCIP *	scip,
		SCIP_EVENTHDLRDATA *	eventhdlrdata,
		TREEDATA *	treedata,
		SCIP_Bool	isleaf
	)

static

update all time series

Parameters

scip	SCIP data structure
eventhdlrdata	event handler data
treedata	tree data
isleaf	are we at a leaf node?

Definition at line 2509 of file event_estim.c.

References NTIMESERIES, NULL, SCIP_CALL, SCIP_LONGINT_FORMAT, SCIP_OKAY, SCIPdebugMsg, timeSeriesGetName(), timeSeriesGetValue(), and timeSeriesUpdate().

Referenced by SCIP_DECL_EVENTEXEC().

◆ printReport()

static char * printReport	(	SCIP *	scip,
		SCIP_EVENTHDLRDATA *	eventhdlrdata,
		char *	strbuf,
		int	reportnum
	)

static

print a treesize estimation report into the string buffer

Parameters

scip	SCIP data structure
eventhdlrdata	event handler data
strbuf	string buffer
reportnum	report number, or 0 to omit number

Definition at line 2537 of file event_estim.c.

References TimeSeries::des, doubleExpSmoothGetTrend(), getSearchCompletion(), MAX, MIN, TreeData::ninner, TreeData::nleaves, TreeData::nnodes, TreeData::nopen, NTIMESERIES, TreeData::nvisited, predictTotalSizeTreeProfile(), real2String(), SCIP_CALL_ABORT, SCIP_Longint, SCIP_LONGINT_FORMAT, SCIP_MAXSTRLEN, SCIP_Real, SCIPgetSolvingTime(), SCIPgetTreesizeEstimation(), SCIPsnprintf(), timeSeriesEstimate(), timeSeriesGetName(), timeSeriesGetResolution(), timeSeriesGetSmoothEstimation(), timeSeriesGetValue(), treeDataGetWbe(), and TreeData::weight.

Referenced by SCIP_DECL_EVENTEXEC(), and SCIP_DECL_TABLEOUTPUT().

◆ SCIP_DECL_EVENTCOPY()

static SCIP_DECL_EVENTCOPY ( eventCopyEstim )

static

copy method for event handler plugins (called when SCIP copies plugins)

Definition at line 2625 of file event_estim.c.

References NULL, SCIP_CALL, SCIP_OKAY, and SCIPincludeEventHdlrEstim().

◆ SCIP_DECL_EVENTFREE()

static SCIP_DECL_EVENTFREE ( eventFreeEstim )

static

destructor of event handler to free user data (called when SCIP is exiting)

Definition at line 2636 of file event_estim.c.

References freeTimeSeries(), freeTreeData(), NULL, SCIP_OKAY, SCIPeventhdlrGetData(), and SCIPfreeMemory.

◆ SCIP_DECL_EVENTINIT()

static SCIP_DECL_EVENTINIT ( eventInitEstim )

static

initialization method of event handler (called after problem was transformed)

Definition at line 2654 of file event_estim.c.

References DEFAULT_REGFORESTFILENAME, NULL, SCIP_CALL, SCIP_OKAY, SCIPeventhdlrGetData(), and SCIPregForestFromFile().

◆ SCIP_DECL_EVENTEXIT()

static SCIP_DECL_EVENTEXIT ( eventExitEstim )

static

deinitialization method of event handler (called before transformed problem is freed)

Definition at line 2675 of file event_estim.c.

References NULL, SCIP_OKAY, SCIPeventhdlrGetData(), and SCIPregForestFree().

◆ SCIP_DECL_EVENTINITSOL()

static SCIP_DECL_EVENTINITSOL ( eventInitsolEstim )

static

solving process initialization method of event handler (called when branch and bound process is about to begin)

Definition at line 2689 of file event_estim.c.

References createTreeProfile(), EVENTTYPE_ESTIM, NULL, resetTimeSeries(), resetTreeData(), SCIP_CALL, SCIP_OKAY, SCIPcatchEvent(), SCIPeventhdlrGetData(), and TRUE.

◆ SCIP_DECL_EVENTEXITSOL()

static SCIP_DECL_EVENTEXITSOL ( eventExitsolEstim )

static

solving process deinitialization method of event handler (called before branch and bound process data is freed)

Definition at line 2719 of file event_estim.c.

References EVENTTYPE_ESTIM, freeTreeProfile(), NULL, SCIP_CALL, SCIP_OKAY, SCIPdropEvent(), and SCIPeventhdlrGetData().

◆ SCIP_DECL_EVENTEXEC()

static SCIP_DECL_EVENTEXEC ( eventExecEstim )

static

execution method of event handler

Definition at line 2736 of file event_estim.c.

References FALSE, isRestartApplicable(), NULL, printReport(), SCIP_Bool, SCIP_CALL, SCIP_EVENTTYPE_NODEBRANCHED, SCIP_EVENTTYPE_NODEDELETE, SCIP_MAXSTRLEN, SCIP_NODETYPE_CHILD, SCIP_NODETYPE_DEADEND, SCIP_NODETYPE_LEAF, SCIP_NODETYPE_SIBLING, SCIP_OKAY, SCIP_Real, SCIP_STATUS_UNKNOWN, SCIP_VERBLEVEL_HIGH, SCIPdebugMsg, SCIPeventGetNode(), SCIPeventGetType(), SCIPeventhdlrGetData(), SCIPfloor(), SCIPgetNChildren(), SCIPgetNRuns(), SCIPgetStatus(), SCIPnodeGetType(), SCIPrestartSolve(), SCIPverbMessage(), SCIPwasNodeLastBranchParent(), shouldApplyRestart(), updateTimeseries(), updateTreeData(), updateTreeProfile(), and TreeData::weight.

◆ SCIP_DECL_TABLEOUTPUT()

static SCIP_DECL_TABLEOUTPUT ( tableOutputEstim )

static

output method of statistics table to output file stream 'file'

Definition at line 2839 of file event_estim.c.

References EVENTHDLR_NAME, NULL, printReport(), SCIP_MAXSTRLEN, SCIP_OKAY, SCIPeventhdlrGetData(), SCIPfindEventhdlr(), and SCIPinfoMessage().

◆ SCIP_DECL_DISPOUTPUT()

static SCIP_DECL_DISPOUTPUT ( dispOutputCompleted )

static

output method of search tree completion display column to output file stream 'file'

Definition at line 2859 of file event_estim.c.

References DISP_NAME, EVENTHDLR_NAME, getSearchCompletion(), MIN, NULL, SCIP_CALL, SCIP_OKAY, SCIP_Real, SCIPdispGetName(), SCIPeventhdlrGetData(), SCIPfindEventhdlr(), SCIPinfoMessage(), and TreeData::weight.

◆ SCIPincludeEventHdlrEstim()

SCIP_RETCODE SCIPincludeEventHdlrEstim ( SCIP * scip )

creates event handler for tree size estimation

Parameters

scip	SCIP data structure

Definition at line 2889 of file event_estim.c.

References BMSclearMemory, createTreeData(), DEFAULT_COEFMONOSSG, DEFAULT_COEFMONOWEIGHT, DEFAULT_COMPLETIONTYPE, DEFAULT_COUNTONLYLEAVES, DEFAULT_ESTIMMETHOD, DEFAULT_HITCOUNTERLIM, DEFAULT_MINNODES, DEFAULT_REGFORESTFILENAME, DEFAULT_REPORTFREQ, DEFAULT_RESTARTACTPRICERS, DEFAULT_RESTARTFACTOR, DEFAULT_RESTARTLIMIT, DEFAULT_RESTARTNONLINEAR, DEFAULT_RESTARTPOLICY, DEFAULT_SHOWSTATS, DEFAULT_SSG_NMAXSUBTREES, DEFAULT_SSG_NMINNODESLASTSPLIT, DEFAULT_TREEPROFILE_ENABLED, DEFAULT_TREEPROFILE_MINNODESPERDEPTH, DEFAULT_USELEAFTS, DISP_DESC, DISP_HEADER, DISP_NAME, DISP_POSITION, DISP_PRIORITY, DISP_STRIPLINE, DISP_WIDTH, ESTIMMETHODS, EVENTHDLR_DESC, EVENTHDLR_NAME, FALSE, freeTreeData(), includeTimeseries(), NULL, SCIP_CALL, SCIP_CALL_TERMINATE, SCIP_DISPSTATUS_AUTO, SCIP_LONGINT_MAX, SCIP_OKAY, SCIP_REAL_MAX, SCIPaddBoolParam(), SCIPaddCharParam(), SCIPaddIntParam(), SCIPaddLongintParam(), SCIPaddRealParam(), SCIPaddStringParam(), SCIPallocMemory, SCIPfreeMemory, SCIPincludeDisp(), SCIPincludeEventhdlrBasic(), SCIPincludeTable(), SCIPsetEventhdlrCopy(), SCIPsetEventhdlrExit(), SCIPsetEventhdlrExitsol(), SCIPsetEventhdlrFree(), SCIPsetEventhdlrInit(), SCIPsetEventhdlrInitsol(), TABLE_DESC, TABLE_EARLIEST_STAGE, TABLE_NAME, TABLE_POSITION, and TRUE.

Referenced by SCIP_DECL_EVENTCOPY(), and SCIPincludeDefaultPlugins().

◆ SCIPgetTreesizeEstimation()

SCIP_Real SCIPgetTreesizeEstimation ( SCIP * scip )

return an estimation of the final tree size

Parameters

scip	SCIP data structure

Definition at line 3017 of file event_estim.c.

References ESTIMMETHOD_COMPL, ESTIMMETHOD_ENSMBL, ESTIMMETHOD_GAP, ESTIMMETHOD_LFREQ, ESTIMMETHOD_OPEN, ESTIMMETHOD_SSG, ESTIMMETHOD_TPROF, ESTIMMETHOD_TREEWEIGHT, ESTIMMETHOD_WBE, ESTIMMETHODS, EVENTHDLR_NAME, getEnsembleEstimation(), getEstimCompletion(), NULL, predictTotalSizeTreeProfile(), SCIP_CALL_ABORT, SCIP_Real, SCIPABORT, SCIPerrorMessage, SCIPeventhdlrGetData(), SCIPfindEventhdlr(), SCIPwarningMessage(), timeSeriesEstimate(), treeDataGetWbe(), TSPOS_GAP, TSPOS_LFREQ, TSPOS_NONE, TSPOS_OPEN, TSPOS_SSG, and TSPOS_TREEWEIGHT.

Referenced by printReport(), and shouldApplyRestartEstimation().

SCIP

Detailed Description

Data Structures

Macros

Typedefs

Enumerations

Functions

Macro Definition Documentation

◆ EVENTHDLR_NAME

◆ EVENTHDLR_DESC

◆ EVENTTYPE_ESTIM

◆ RESTARTPOLICY_CHAR_NEVER

◆ RESTARTPOLICY_CHAR_ALWAYS

◆ RESTARTPOLICY_CHAR_COMPLETION

◆ RESTARTPOLICY_CHAR_ESTIMATION

◆ DES_USETRENDINLEVEL

◆ TABLE_NAME

◆ TABLE_DESC

◆ TABLE_POSITION

◆ TABLE_EARLIEST_STAGE

◆ DISP_NAME

◆ DISP_DESC

◆ DISP_HEADER

◆ DISP_WIDTH

◆ DISP_PRIORITY

◆ DISP_POSITION

◆ DISP_STRIPLINE

◆ INITIALSIZE

◆ SESCOEFF

◆ DES_ALPHA_TREEWEIGHT

◆ DES_BETA_TREEWEIGHT

◆ DES_ALPHA_GAP

◆ DES_BETA_GAP

◆ DES_ALPHA_LEAFFREQUENCY

◆ DES_BETA_LEAFFREQUENCY

◆ DES_ALPHA_SSG

◆ DES_BETA_SSG

◆ DES_ALPHA_OPENNODES

◆ DES_BETA_OPENNODES

◆ MAX_REGFORESTSIZE

◆ COMPLETIONTYPE_AUTO

◆ COMPLETIONTYPE_REGFOREST

◆ COMPLETIONTYPE_MONOREG

◆ COMPLETIONTYPE_TREEWEIGHT

◆ COMPLETIONTYPE_SSG

◆ COMPLETIONTYPE_GAP

◆ ESTIMMETHOD_COMPL

◆ ESTIMMETHOD_WBE

◆ ESTIMMETHOD_ENSMBL

◆ ESTIMMETHOD_GAP

◆ ESTIMMETHOD_LFREQ

◆ ESTIMMETHOD_OPEN

◆ ESTIMMETHOD_SSG

◆ ESTIMMETHOD_TPROF

◆ ESTIMMETHOD_TREEWEIGHT

◆ ESTIMMETHODS

◆ TREEPROFILE_MINSIZE

◆ SSG_STARTPRIMBOUND

◆ NTIMESERIES

◆ DEFAULT_USELEAFTS

◆ DEFAULT_REPORTFREQ

◆ DEFAULT_REGFORESTFILENAME

◆ DEFAULT_COEFMONOWEIGHT

◆ DEFAULT_COEFMONOSSG

◆ DEFAULT_COMPLETIONTYPE

◆ DEFAULT_ESTIMMETHOD

◆ DEFAULT_TREEPROFILE_ENABLED

◆ DEFAULT_TREEPROFILE_MINNODESPERDEPTH

◆ DEFAULT_RESTARTPOLICY

◆ DEFAULT_RESTARTLIMIT

◆ DEFAULT_MINNODES

◆ DEFAULT_COUNTONLYLEAVES

◆ DEFAULT_RESTARTFACTOR

◆ DEFAULT_RESTARTNONLINEAR

◆ DEFAULT_RESTARTACTPRICERS

◆ DEFAULT_HITCOUNTERLIM

◆ DEFAULT_SSG_NMAXSUBTREES

◆ DEFAULT_SSG_NMINNODESLASTSPLIT

◆ DEFAULT_SHOWSTATS

◆ DECL_TIMESERIESUPDATE