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yap-6.3/packages/ProbLog/simplecudd/problogbdd.c

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New ProbLog Distribution Version - all
2010-08-26 13:44:10 +01:00
/******************************************************************************\
* *
* SimpleCUDD library (www.cs.kuleuven.be/~theo/tools/simplecudd.html) *
* SimpleCUDD was developed at Katholieke Universiteit Leuven(www.kuleuven.be) *
* *
* Copyright Katholieke Universiteit Leuven 2008, 2009, 2010 *
* *
* Author: Theofrastos Mantadelis, Angelika Kimmig, Bernd Gutmann *
* File: ProblogBDD.c *
* *
********************************************************************************
* *
* Artistic License 2.0 *
* *
* Copyright (c) 2000-2006, The Perl Foundation. *
* *
* Everyone is permitted to copy and distribute verbatim copies of this license *
* document, but changing it is not allowed. *
* *
* Preamble *
* *
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* development of that Package while still keeping the Package available as *
* open source and free software. *
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* directly with the Copyright Holder of a given Package. If the terms of this *
* license do not permit the full use that you propose to make of the Package, *
* you should contact the Copyright Holder and seek a different licensing *
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\******************************************************************************/
//#include <stdio.h>
//#include <stdlib.h>
#include "simplecudd.h"
#include "problogmath.h"
#include <signal.h>
#include <time.h>
#define VERSION "2.0.1"
#ifndef max
#define max( a, b ) ( ((a) > (b)) ? (a) : (b) )
#endif
// INFINITY macro does not work on trantor (64-bit linux of some kind)
const double my_infinity = 1.0/0.0;
typedef struct _parameters {
int loadfile;
int savedfile;
int exportfile;
int inputfile;
int debug;
int errorcnt;
int *error;
int method;
int queryid;
int timeout;
double sigmoid_slope;
int online;
int maxbufsize;
char *ppid;
int orderfile;
int utilfile;
int independent_forest;
int local_search;
int dynreorder;
int staticorder;
} parameters;
typedef struct _gradientpair {
double probability;
double gradient;
} gradientpair;
typedef struct _extmanager {
DdManager *manager;
DdNode *t, *f;
hisqueue *his;
namedvars varmap;
} extmanager;
typedef struct _bdd_mgr {
extmanager extmanager;
DdNode *root;
} bdd_mgr;
int argtype(const char *arg);
void printhelp(int argc, char **arg);
parameters loadparam(int argc, char **arg);
parameters params;
void handler(int num);
void pidhandler(int num);
void termhandler(int num);
void myexpand(extmanager MyManager, DdNode *Current);
double CalcProbability(extmanager MyManager, DdNode *Current);
double CalcProbabilitySigmoid(extmanager MyManager, DdNode *Current);
gradientpair CalcGradient(extmanager MyManager, DdNode *Current, int TargetVar, char *TargetPattern, int type);
int patterncalculated(char *pattern, extmanager MyManager, int loc);
char * extractpattern(char *thestr);
// added by GUY
double* read_util_file(char * filename);
void exact_strategy_search(extmanager* MyManager, DdNode **forest, double* utilities);
DdNode* buildADDfromBDD(extmanager* MyManager, DdNode *Current, DdManager* addmgr);
void ReInitAndUnrefHistory(hisqueue *HisQueue, int varcnt, DdManager* mgr);
int extractstrategy(extmanager* MyManager, DdManager * add_mgr, DdNode *Current, DdNode *max_node);
DdNode * setLowerBound(DdManager * dd, DdNode * f, double lowerBound);
DdNode * setLowerBoundRecur(DdManager * dd, DdNode * f, double lowerBound);
void local_strategy_search(extmanager* MyManager, DdNode **forest, double* utilities);
void local_strategy_search_independent(bdd_mgr* bdd_mgrs, double* utilities, int nb_bdds, namedvars globalvars);
double expected_value(extmanager* MyManager, DdNode **forest, double* utilities);
void print_strategy(namedvars varmap);
void newManager(extmanager* MyManager,bddfileheader fileheader, int nbManagers);
bdd_mgr* generateIndependentBDDForest(bddfileheader fileheader);
int LoadVariableDataForForest(namedvars varmap, char *filename);
int main(int argc, char **arg) {
extmanager MyManager;
DdNode *bdd, **forest, *bakbdd;
bddfileheader fileheader;
int i, ivarcnt, code, curbdd;
gradientpair tvalue;
double probability = -1.0;
char *varpattern;
bdd_mgr* bdd_mgrs;
varpattern = NULL;
code = -1;
params = loadparam(argc, arg);
//Initializin to NULL to be safe?
bdd = NULL;
forest = NULL;
bdd_mgrs = NULL;
if (params.errorcnt > 0) {
printhelp(argc, arg);
for (i = 0; i < params.errorcnt; i++) {
fprintf(stderr, "Error: not known or error at parameter %s.\n", arg[params.error[i]]);
}
return -1;
}
if (params.online == 0 && params.loadfile == -1) {
printhelp(argc, arg);
fprintf(stderr, "Error: you must specify a loading file.\n");
return -1;
}
ProbLog Distribution
2010-08-27 16:17:01 +01:00
if (params.method != 0 && arg[params.method][0] != 'g' && arg[params.method][0] != 'p' && arg[params.method][0] != 'o' && arg[params.method][0] != 'l' && arg[params.method][0] != 's') {
New ProbLog Distribution Version - all
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printhelp(argc, arg);
ProbLog Distribution
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fprintf(stderr, "Error: you must choose a calculation method beetween [p]robability, [g]radient, [l]ine search, [s]earch for strategy, [o]nline.\n");
New ProbLog Distribution Version - all
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return -1;
}
ProbLog Distribution
2010-08-27 16:17:01 +01:00
if (params.method != 0 && (arg[params.method][0] == 'g' || arg[params.method][0] == 'p' || arg[params.method][0] == 'l') && params.inputfile == -1) {
New ProbLog Distribution Version - all
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printhelp(argc, arg);
ProbLog Distribution
2010-08-27 16:17:01 +01:00
fprintf(stderr, "Error: an input file is necessary for probability, gradient or line search calculation methods.\n");
New ProbLog Distribution Version - all
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return -1;
}
if (params.debug) DEBUGON;
RAPIDLOADON;
SETMAXBUFSIZE(params.maxbufsize);
signal(SIGINT, termhandler);
if (params.ppid != NULL) {
signal(SIGALRM, pidhandler);
alarm(5);
} else {
signal(SIGALRM, handler);
alarm(params.timeout);
}
if (params.online) {
if (params.dynreorder == 1)
MyManager.manager = simpleBDDinit(0);
else
MyManager.manager = simpleBDDinitNoReOrder(0);
MyManager.t = HIGH(MyManager.manager);
MyManager.f = LOW(MyManager.manager);
MyManager.varmap = InitNamedVars(1, 0);
bdd = OnlineGenerateBDD(MyManager.manager, &MyManager.varmap);
ivarcnt = GetVarCount(MyManager.manager);
} else if(params.independent_forest>0){
// the flag to create a forest of independent bdds is set
fileheader = ReadFileHeader(arg[params.loadfile]);
if (_debug) fprintf(stderr,"Generating forest of independent BDDs.\n");
bdd_mgrs = generateIndependentBDDForest(fileheader);
ivarcnt = fileheader.varcnt;
MyManager.varmap = InitNamedVars(fileheader.varcnt, fileheader.varstart);
} else{
fileheader = ReadFileHeader(arg[params.loadfile]);
switch(fileheader.filetype) {
case BDDFILE_SCRIPT:
if (params.dynreorder == 1)
MyManager.manager = simpleBDDinit(fileheader.varcnt);
else
MyManager.manager = simpleBDDinitNoReOrder(fileheader.varcnt);
MyManager.t = HIGH(MyManager.manager);
MyManager.f = LOW(MyManager.manager);
MyManager.varmap = InitNamedVars(fileheader.varcnt, fileheader.varstart);
if (params.staticorder > 0) {
char **Order = GetVariableOrder(arg[params.staticorder], MyManager.varmap.varcnt);
for (i = 0; i < MyManager.varmap.varcnt; i++)
if (Order[i] != NULL) AddNamedVarAt(MyManager.varmap, Order[i], i);
}
if (fileheader.version > 1) {
forest = FileGenerateBDDForest(MyManager.manager, MyManager.varmap, fileheader);
bdd = forest[0];
bakbdd = bdd;
} else {
forest = NULL;
bdd = FileGenerateBDD(MyManager.manager, MyManager.varmap, fileheader);
bakbdd = bdd;
}
ivarcnt = fileheader.varcnt;
break;
case BDDFILE_NODEDUMP:
if (params.dynreorder == 1)
MyManager.manager = simpleBDDinit(fileheader.varcnt);
else
MyManager.manager = simpleBDDinitNoReOrder(fileheader.varcnt);
MyManager.t = HIGH(MyManager.manager);
MyManager.f = LOW(MyManager.manager);
MyManager.varmap = InitNamedVars(fileheader.varcnt, fileheader.varstart);
bdd = LoadNodeDump(MyManager.manager, MyManager.varmap, fileheader.inputfile);
ivarcnt = fileheader.varcnt;
break;
default:
fprintf(stderr, "Error: not a valid file format to load.\n");
return -1;
break;
}
}
alarm(0);
// problem specifics
if (params.method == 0 || arg[params.method][0] != 's') {
if (bdd != NULL || bdd_mgrs != NULL) {
ivarcnt = RepairVarcnt(&MyManager.varmap);
code = 0;
if (params.inputfile != -1) {
if (LoadVariableData(MyManager.varmap, arg[params.inputfile]) == -1) return -1;
if (!all_loaded(MyManager.varmap, 1)) return -1;
}
// impose a predifined order good for debugging
// can be used with a partial number of variables to impose ordering at beggining of BDD
if (params.orderfile != -1) {
ImposeOrder(MyManager.manager, MyManager.varmap, GetVariableOrder(arg[params.orderfile], MyManager.varmap.varcnt));
}
curbdd = 0;
do {
MyManager.his = InitHistory(ivarcnt);
if (params.method != 0) {
switch(arg[params.method][0]) {
case 'g':
for (i = 0; i < MyManager.varmap.varcnt; i++) {
if (MyManager.varmap.vars[i] != NULL) {
// check whether this is a continues fact
if (MyManager.varmap.dynvalue[i] == NULL) { // nope, regular fact
varpattern = extractpattern(MyManager.varmap.vars[i]);
if ((varpattern == NULL) || (!patterncalculated(varpattern, MyManager, i))) {
tvalue = CalcGradient(MyManager, bdd, i + MyManager.varmap.varstart, varpattern, 0);
probability = tvalue.probability;
if (varpattern == NULL) {
printf("query_gradient(%s,%s,p,%e).\n", arg[params.queryid], MyManager.varmap.vars[i], tvalue.gradient);
} else {
varpattern[strlen(varpattern) - 2] = '\0';
printf("query_gradient(%s,%s,p,%e).\n", arg[params.queryid], varpattern, tvalue.gradient);
}
ReInitHistory(MyManager.his, MyManager.varmap.varcnt);
if (varpattern != NULL) free(varpattern);
}
} else { // it is! let's do the Hybrid Problog Magic
// first for mu
varpattern = extractpattern(MyManager.varmap.vars[i]);
if ((varpattern == NULL) || (!patterncalculated(varpattern, MyManager, i))) {
tvalue = CalcGradient(MyManager, bdd, i + MyManager.varmap.varstart, varpattern, 1);
probability = tvalue.probability;
if (varpattern == NULL) {
printf("query_gradient(%s,%s,mu,%e).\n", arg[params.queryid], MyManager.varmap.vars[i], tvalue.gradient);
} else {
varpattern[strlen(varpattern) - 2] = '\0';
printf("query_gradient(%s,%s,mu,%e).\n", arg[params.queryid], varpattern, tvalue.gradient);
}
}
ReInitHistory(MyManager.his, MyManager.varmap.varcnt);
if (varpattern != NULL) free(varpattern);
// then for sigma
varpattern = extractpattern(MyManager.varmap.vars[i]);
if ((varpattern == NULL) || (!patterncalculated(varpattern, MyManager, i))) {
tvalue = CalcGradient(MyManager, bdd, i + MyManager.varmap.varstart, varpattern, 2);
probability = tvalue.probability;
if (varpattern == NULL) {
printf("query_gradient(%s,%s,sigma,%e).\n", arg[params.queryid], MyManager.varmap.vars[i], tvalue.gradient);
} else {
varpattern[strlen(varpattern) - 2] = '\0';
printf("query_gradient(%s,%s,sigma,%e).\n", arg[params.queryid], varpattern, tvalue.gradient);
}
}
ReInitHistory(MyManager.his, MyManager.varmap.varcnt);
if (varpattern != NULL) free(varpattern);
}
} else {
fprintf(stderr, "Error: no variable name given for parameter.\n");
}
}
if (probability < 0.0) {
// no nodes, so we have to calculate probability ourself
tvalue = CalcGradient(MyManager, bdd, 0 + MyManager.varmap.varstart, NULL, 0);
probability = tvalue.probability;
}
printf("query_probability(%s,%e).\n", arg[params.queryid], probability);
break;
case 'l':
tvalue = CalcGradient(MyManager, bdd, 0 + MyManager.varmap.varstart, NULL, 0);
probability = tvalue.probability;
printf("query_probability(%s,%e).\n", arg[params.queryid], probability);
break;
case 'p':
printf("probability(%e).\n", CalcProbability(MyManager, bdd));
break;
case 'o':
onlinetraverse(MyManager.manager, MyManager.varmap, MyManager.his, bdd);
break;
default:
myexpand(MyManager, bdd);
break;
}
} else {
myexpand(MyManager, bdd);
}
if (forest != NULL) {
curbdd++;
bdd = forest[curbdd];
} else {
bdd = NULL;
}
// Guy: I removed it, why is it here?
// ReInitHistory(MyManager.his, MyManager.varmap.varcnt);
} while(bdd != NULL);
bdd = bakbdd;
if (params.savedfile > -1) SaveNodeDump(MyManager.manager, MyManager.varmap, bdd, arg[params.savedfile]);
if (params.exportfile > -1) simpleNamedBDDtoDot(MyManager.manager, MyManager.varmap, bdd, arg[params.exportfile]);
}
}else{
// param "s" is set
// do strategy search on the forest
code = 0;
if(params.independent_forest>0){
//the forest consists of independent bdds
LoadVariableDataForForest(MyManager.varmap,arg[params.inputfile]);
if(bdd_mgrs[0].root == NULL){
fprintf(stderr, "Error: No BDDs were generated.\n");
return -1;
}
if (_debug) fprintf(stderr,"Initializing histories.\n");
if(params.local_search>0){
if (_debug) fprintf(stderr,"Independent local search.\n");
local_strategy_search_independent(bdd_mgrs, read_util_file(arg[params.utilfile]), fileheader.intercnt, MyManager.varmap);
}else{
if (_debug) fprintf(stderr,"Independent exact search.\n");
fprintf(stderr, "Error: independent exact search not supported yet.\n");
return -1;
}
}else{
ivarcnt = RepairVarcnt(&MyManager.varmap);
//the forest is a bdd with multiple entry points
if (params.inputfile != -1) {
if (LoadVariableData(MyManager.varmap, arg[params.inputfile]) == -1) return -1;
if (!all_loaded(MyManager.varmap, 1)) return -1;
}
// impose a predifined order good for debugging
// can be used with a partial number of variables to impose ordering at beggining of BDD
if (params.orderfile != -1) {
ImposeOrder(MyManager.manager, MyManager.varmap, GetVariableOrder(arg[params.orderfile], MyManager.varmap.varcnt));
}
MyManager.his = InitHistory(ivarcnt);
if (_debug) fprintf(stderr,"Initialized shared history with %i variables.\n", ivarcnt);
if(params.local_search>0){
if (_debug) fprintf(stderr,"Local search.\n");
local_strategy_search(&MyManager, forest, read_util_file(arg[params.utilfile]));
}else{
if (_debug) fprintf(stderr,"Exact search.\n");
exact_strategy_search(&MyManager, forest, read_util_file(arg[params.utilfile]));
}
free(MyManager.his);
}
print_strategy(MyManager.varmap);
}
if (_debug) fprintf(stderr,"Cleaning up.\n");
if(params.independent_forest>0){
// TODO clean up memory - the existing code gives an invalid pointer problem
}else{
if (MyManager.manager != NULL) {
KillBDD(MyManager.manager);
free(MyManager.varmap.dvalue);
free(MyManager.varmap.ivalue);
if (MyManager.varmap.dynvalue != NULL) {
for(i = 0; i < MyManager.varmap.varcnt; i++)
if (MyManager.varmap.dynvalue[i] != NULL) {
free(MyManager.varmap.dynvalue[i]);
}
free(MyManager.varmap.dynvalue);
}
for (i = 0; i < MyManager.varmap.varcnt; i++)
free(MyManager.varmap.vars[i]);
free(MyManager.varmap.vars);
}
}
if (params.error != NULL) free(params.error);
return code;
}
//////////////////
// Added by Guy //
//////////////////
double* read_util_file(char *filename){
FILE* file;
double line;
int nb_lines;
double *utils;
int i=0;
if ((file = fopen(filename, "r")) == NULL) {
perror(filename);
return NULL;
}
// Read file
fscanf(file, "%i\n", &nb_lines);
utils = (double *) malloc(sizeof(double)*nb_lines);
//utils = new double[nb_lines];
while (!feof(file)) {
fscanf(file, "%lf\n", &line);
//fprintf(stderr,"read %g.\n", line);
if(i>nb_lines) {
fprintf(stderr,"The number of lines field of %i does not match the number of lines in the file.\n",nb_lines);
fclose(file);
exit(1);
}
utils[i++] = line;
}
fclose(file);
if(i!=nb_lines) {
fprintf(stderr,"The number of lines field of %i does not match the number of lines in the file %i.\n",nb_lines,i);
fclose(file);
exit(1);
}
if (params.debug) for(i=0;i<nb_lines;i++){ fprintf(stderr,"utils[%i]=%g\n", i,utils[i]); }
return utils;
}
int forestSize(DdNode **forest){
int i = 0;
do{
i++;
}while(forest[i] != NULL);
return i;
}
typedef struct _util_add {
DdNode * root;
double util_spread;
} util_add;
int compare_util_adds(const void* A, const void* B){
if(((const util_add*) A)->util_spread < ((const util_add*) B)->util_spread) return 1;
else if (((const util_add*) A)->util_spread > ((const util_add*) B)->util_spread) return -1;
else return 0;
}
void exact_strategy_search(extmanager* MyManager, DdNode **forest, double* utilities){
DdManager* add_mgr;
DdNode *sum, *temp, *add_ps, *constant;
DdNode *max_node;
FILE *outfile; //output file pointer for .dot file
int i;
char filename[128];
char** names;
int n = forestSize(forest);
double utility_to_go = 0.000001;
util_add * util_adds = (util_add *) malloc(sizeof(util_add)*n);
if (params.debug) {
fprintf(stderr, "init add\n");
}
if (params.dynreorder == 1) {
add_mgr = simpleBDDinit(MyManager->varmap.varcnt);
}else{
add_mgr = simpleBDDinitNoReOrder(MyManager->varmap.varcnt);
}
if (params.debug){
fprintf(stderr, "end init add\n");
}
if (params.debug) {
names= malloc(sizeof(char*)*MyManager->varmap.varcnt);
for(i = MyManager->varmap.varstart ;i < MyManager->varmap.varcnt; i++){
names[i- MyManager->varmap.varstart] = MyManager->varmap.vars[i];
}
}
for(i=n-1;i>=0;i--){
if (params.debug) {
// write BDD file
snprintf(filename, sizeof(filename), "bdd-total.dot");
outfile = fopen(filename,"w");
Cudd_DumpDot(MyManager->manager, n, forest, names, NULL, outfile);
fclose(outfile);
temp = Cudd_BddToAdd(MyManager->manager,forest[i]);
Cudd_Ref(temp);
snprintf(filename, sizeof(filename), "bdd-%i.dot", i+1);
outfile = fopen(filename,"w");
Cudd_DumpDot(MyManager->manager, 1, &temp,names, NULL, outfile);
fclose(outfile);
Cudd_RecursiveDeref(MyManager->manager,temp);
}
// create ADD for Ps
add_ps = buildADDfromBDD(MyManager,forest[i],add_mgr);
Cudd_Ref(add_ps);
if (params.debug) fprintf(stderr, "built add_ps\n");
ReInitAndUnrefHistory(MyManager->his, MyManager->varmap.varcnt,add_mgr);
Cudd_RecursiveDeref(MyManager->manager,forest[i]);
if (params.debug) {
// write ADD-Ps file
snprintf(filename, sizeof(filename), "add-ps-%i.dot", i+1);
outfile = fopen(filename,"w");
Cudd_DumpDot(add_mgr, 1, &add_ps, names, NULL, outfile);
fclose(outfile);
}
//if (1 || _debug) fprintf(stderr,"best terminal of add_ps after %i now %g.\n", i,cuddV(Cudd_addFindMax(add_mgr,add_ps)));
//create ADD for u
constant = Cudd_addConst(add_mgr,utilities[i]);
Cudd_Ref(constant);
util_adds[i].root = Cudd_addApply(add_mgr,Cudd_addTimes,add_ps,constant);
Cudd_Ref(util_adds[i].root);
Cudd_RecursiveDeref(add_mgr,constant);
Cudd_RecursiveDeref(add_mgr,add_ps);
//add_ps can only be dereferenced when the history is cleared or when referenced twice.
if (params.debug) {
// write ADD-U file
snprintf(filename, sizeof(filename), "add-u-%i.dot", i+1);
outfile = fopen(filename,"w");
Cudd_DumpDot(add_mgr, 1, &util_adds[i].root, names, NULL, outfile);
fclose(outfile);
}
// compute the maximum achievable utility to set useless terminals to -inf
max_node = Cudd_addFindMax(add_mgr,util_adds[i].root);
util_adds[i].util_spread = cuddV(max_node);
max_node = Cudd_addFindMin(add_mgr,util_adds[i].root);
util_adds[i].util_spread += -cuddV(max_node);
utility_to_go += util_adds[i].util_spread;
//if (1 || _debug) fprintf(stderr,"best terminal of util_add after %i now %g.\n", i,cuddV(Cudd_addFindMax(add_mgr,util_adds[i].root)));
}
qsort(util_adds, (size_t)n, sizeof(util_add), compare_util_adds);
sum = Cudd_addConst(add_mgr,0);
Cudd_Ref(sum);
for(i=0;i<n;i++){ // iterate from high to low spread!
if (params.debug) fprintf(stderr, "Merging ADD %i/%i\n",i,(n-1));
temp = Cudd_addApply(add_mgr,Cudd_addPlus,sum,util_adds[i].root);
Cudd_Ref(temp);
Cudd_RecursiveDeref(add_mgr,sum);
Cudd_RecursiveDeref(add_mgr,util_adds[i].root);
sum = temp;
//if (1 || _debug) fprintf(stderr,"best terminal of sum after %i now %g.\n", i,cuddV(Cudd_addFindMax(add_mgr,sum)));
if(i<n-1){ // don't do this for the last one, you risk setting every terminal to -inf
utility_to_go -= util_adds[i].util_spread;
if (params.debug) fprintf(stderr, "The next BDD can make a difference of %g\n",util_adds[i].util_spread);
if (params.debug) fprintf(stderr, "Utility to go is %g\n",utility_to_go);
max_node = Cudd_addFindMax(add_mgr,sum);
if (params.debug) fprintf(stderr, "Setting lower bound to %g\n",cuddV(max_node)-utility_to_go);
if (params.debug) fprintf(stderr, "Reducing node count from %i",Cudd_DagSize(sum));
temp = setLowerBound(add_mgr,sum,cuddV(max_node)-utility_to_go);
Cudd_Ref(temp);
Cudd_RecursiveDeref(add_mgr,sum);
sum = temp;
if (params.debug) fprintf(stderr, " to %i\n",Cudd_DagSize(sum));
if (params.debug) {
// write ADD-U-inf file
snprintf(filename, sizeof(filename), "add-u-inf-%i.dot", i+1);
outfile = fopen(filename,"w");
Cudd_DumpDot(add_mgr, 1, &sum, names, NULL, outfile);
fclose(outfile);
}
}
}
free(util_adds);
if (params.debug) {
// write ADD-U-total file
snprintf(filename, sizeof(filename), "add-u-total.dot");
outfile = fopen(filename,"w");
Cudd_DumpDot(add_mgr, 1, &sum, names, NULL, outfile);
fclose(outfile);
}
// find max terminal
max_node = Cudd_addFindMax(add_mgr,sum);
//API says Cudd_V, but only cuddV works?!
if (_debug) fprintf(stderr,"expected_value(%g).\n", cuddV(max_node));
printf("expected_value(%g).\n", cuddV(max_node));
if (params.debug) fprintf(stderr, "extracting strategy from ADD\n");
ReInitHistory(MyManager->his, MyManager->varmap.varcnt);
extractstrategy(MyManager, add_mgr, sum, max_node);
Cudd_RecursiveDeref(add_mgr,sum);
}
DdNode* buildADDfromBDD(extmanager* MyManager, DdNode *Current, DdManager* addmgr) {
// the created adds are not dereferenced
// must be done based on the dynamic programming table
DdNode *h, *l;
hisnode *Found;
char *curnode;
double fact_prob;
int isDecision;
DdNode *lowvalue, *highvalue, *thisvalue;
DdNode *lowAdd, *highAdd;
DdNode* var;
DdNode *posprob, *negprob;
//if (_debug && Cudd_DebugCheck(addmgr)!=0) exit(-1);
if (_debug) {
fprintf(stderr, "(%p) ", Current);
curnode = GetNodeVarNameDisp(MyManager->manager, MyManager->varmap, Current);
fprintf(stderr, " aka %s\n", curnode);
}
// base cases
if (Current == MyManager->t){
thisvalue = Cudd_ReadOne(addmgr);
Cudd_Ref(thisvalue);
//if(_debug && Cudd_DebugCheck(addmgr)!=0) exit(-1);
return thisvalue;
}
if (Current == MyManager->f){
thisvalue = Cudd_ReadZero(addmgr);
Cudd_Ref(thisvalue);
//if(_debug && Cudd_DebugCheck(addmgr)!=0) exit(-1);
return thisvalue;
}
//node is in cache
if ((Found = GetNode(MyManager->his, MyManager->varmap.varstart, Current)) != NULL){
if (_debug) fprintf(stderr, "found node %p (%s) in history\n", Current,curnode);
return (DdNode*)(Found->dynvalue);
}
//inductive case
l = LowNodeOf(MyManager->manager, Current);
if (_debug) fprintf(stderr, "l(%s)->%p", curnode,l);
lowvalue = buildADDfromBDD(MyManager,l,addmgr);
h = HighNodeOf(MyManager->manager, Current);
if (_debug) fprintf(stderr, "h(%s)->%p", curnode,h);
highvalue = buildADDfromBDD(MyManager,h,addmgr);
//if(params.debug && Cudd_DebugCheck(addmgr)!=0) exit(-1);
isDecision = MyManager->varmap.ivalue[GetIndex(Current) - MyManager->varmap.varstart];
if(isDecision){
//decision
if (_debug) fprintf(stderr,"%p (%s) is a decision\n",Current,curnode);
var = Cudd_addIthVar(addmgr,(int)GetIndex(Current));
Cudd_Ref(var);
thisvalue=Cudd_addIte(addmgr,var,highvalue,lowvalue);
Cudd_Ref(thisvalue);
Cudd_RecursiveDeref(addmgr,var);
} else {
//probabilistic node
if (_debug) fprintf(stderr,"%p (%s) is a probabilistic fact",Current,curnode);
fact_prob = MyManager->varmap.dvalue[GetIndex(Current) - MyManager->varmap.varstart];
if (_debug) fprintf(stderr, " with probability %lf \n", fact_prob);
posprob = Cudd_addConst(addmgr,fact_prob);
Cudd_Ref(posprob);
highAdd=Cudd_addApply(addmgr,Cudd_addTimes,posprob,highvalue);
Cudd_Ref(highAdd);
Cudd_RecursiveDeref(addmgr,posprob);
negprob=Cudd_addConst(addmgr,1-fact_prob);
Cudd_Ref(negprob);
lowAdd= Cudd_addApply(addmgr,Cudd_addTimes,negprob,lowvalue);
Cudd_Ref(lowAdd);
Cudd_RecursiveDeref(addmgr,negprob);
thisvalue = Cudd_addApply(addmgr,Cudd_addPlus,highAdd,lowAdd);
Cudd_Ref(thisvalue);
Cudd_RecursiveDeref(addmgr,lowAdd);
Cudd_RecursiveDeref(addmgr,highAdd);
}
AddNode(MyManager->his, MyManager->varmap.varstart, Current, 0, 0, thisvalue);
return thisvalue;
}
void ReInitAndUnrefHistory(hisqueue *HisQueue, int varcnt, DdManager* mgr) {
int i, j;
for (i = 0; i < varcnt; i++) {
if (HisQueue[i].thenode != NULL) {
for (j = 0; j < HisQueue[i].cnt; j++){
if(HisQueue[i].thenode[j].ivalue != 0){
//if (_debug) fprintf(stderr,"At (%i,%i), unreffing node %i",i,j,HisQueue[i].thenode[j].ivalue);
Cudd_RecursiveDeref(mgr,(DdNode*)(HisQueue[i].thenode[j].dynvalue));
}
}
free(HisQueue[i].thenode);
HisQueue[i].thenode = NULL;
}
HisQueue[i].cnt = 0;
}
}
char* GetAddNodeVarNameDisp(namedvars varmap, DdNode *node) {
unsigned int index;
char *buffer = malloc(sizeof(char)*128);
if (Cudd_IsConstant(node)) {
snprintf(buffer, 128, "%lf", cuddV(node));
return buffer;
}
if (NULL == node) return "(null)";
index = GetIndex(node);
return varmap.vars[index - varmap.varstart];
}
int extractstrategy(extmanager* MyManager, DdManager * add_mgr, DdNode *Current, DdNode *max_node) {
char *curnode;
int result;
hisnode *Found;
if (params.debug) {
fprintf(stderr, "handling node %p", Current);
curnode = GetAddNodeVarNameDisp(MyManager->varmap, Current);
fprintf(stderr, " aka %s\n", curnode);
}
if(max_node == Current) return 1;
else if (Cudd_IsConstant(Current)) return 0;
else{
if ((Found = GetNode(MyManager->his, MyManager->varmap.varstart, Current)) != NULL) {
return Found->ivalue;
}
if(extractstrategy(MyManager,add_mgr,LowNodeOf(add_mgr, Current),max_node)){
// set strategy to 0
MyManager->varmap.dvalue[GetIndex(Current) - MyManager->varmap.varstart] = 0;
result = 1;
}else if(extractstrategy(MyManager,add_mgr,HighNodeOf(add_mgr, Current),max_node)){
// set strategy to 1
MyManager->varmap.dvalue[GetIndex(Current) - MyManager->varmap.varstart] = 1;
result = 1;
}else result = 0;
AddNode(MyManager->his, MyManager->varmap.varstart, Current, 0, result, NULL);
return result;
}
}
DdNode * setLowerBound(DdManager * dd, DdNode * f, double lowerBound) {
DdNode *res;
do {
res = setLowerBoundRecur(dd,f,lowerBound);
} while (dd->reordered == 1);
return(res);
}
DdNode * setLowerBoundRecur(DdManager * dd, DdNode * f, double lowerBound) {
DdNode *res, *fv, *fvn, *T, *E;
DD_CTFP1 cacheOp;
statLine(dd);
if (cuddIsConstant(f)) {
if(cuddV(f)<lowerBound){
return cuddUniqueConst(dd,-my_infinity);
}else return f;
}
cacheOp = (DD_CTFP1) setLowerBound;
res = cuddCacheLookup1(dd,cacheOp,f);
if (res != NULL) {
return(res);
}
/* Recursive Step */
fv = cuddT(f);
fvn = cuddE(f);
T = setLowerBoundRecur(dd,fv,lowerBound);
if (T == NULL) {
return(NULL);
}
cuddRef(T);
E = setLowerBoundRecur(dd,fvn,lowerBound);
if (E == NULL) {
Cudd_RecursiveDeref(dd,T);
return(NULL);
}
cuddRef(E);
res = (T == E) ? T : cuddUniqueInter(dd,(int)f->index,T,E);
if (res == NULL) {
Cudd_RecursiveDeref(dd,T);
Cudd_RecursiveDeref(dd,E);
return(NULL);
}
cuddDeref(T);
cuddDeref(E);
/* Store result. */
cuddCacheInsert1(dd,cacheOp,f,res);
return(res);
}
// TODO extmanager* or extmanager ???????
// Is copying the varmap not too inefficient?
void local_strategy_search(extmanager* MyManager, DdNode **forest, double* utilities){
double tempev;
int i;
int j = 0;
int changed = 1;
double bestev = expected_value(MyManager, forest, utilities);
if (_debug) fprintf(stderr,"Initial strategy has reward %g.\n", bestev);
while(changed){
j++;
if (_debug) fprintf(stderr,"starting iteration %i.\n", j);
changed = 0;
for(i = 0; i < MyManager->varmap.varcnt; i++){
if (MyManager->varmap.ivalue[i] == 1) {
//it's a decision, flip it'
MyManager->varmap.dvalue[i] = 1-MyManager->varmap.dvalue[i];
tempev = expected_value(MyManager, forest, utilities);
if(tempev > bestev){
if (_debug) fprintf(stderr,"found new best strategy (%g > %g).\n", tempev, bestev);
bestev = tempev;
changed = 1;
}else{
if (_debug) fprintf(stderr,"keeping old strategy (%g < %g).\n", tempev, bestev);
MyManager->varmap.dvalue[i] = 1-MyManager->varmap.dvalue[i];
}
}
}
}
if (_debug) fprintf(stderr,"expected_value(%g).\n", bestev);
printf("expected_value(%g).\n", bestev);
}
typedef struct _decision{
int var;
int nb_rel_bdds;
int alloc_rel_bdds;
int* rel_bdds;
int* rel_bdds_var;
} decision;
void local_strategy_search_independent(bdd_mgr* bdd_mgrs, double* utilities, int nb_bdds, namedvars globalvars){
int i, j, index;
int changed;
double* bdd_ev = malloc(sizeof(double)*nb_bdds);
double* bdd_ev_temp = malloc(sizeof(double)*nb_bdds);
double difference;
double new_strategy;
int nb_dec_vars = 0;
decision* decs = (decision*) malloc(sizeof(decision)*globalvars.varcnt);
decision* decision;
// Initialize all BDDs and compute their utility
if (_debug) fprintf(stderr,"Initializing BDDs and computing the starting utility\n");
for(i=0;i<nb_bdds;i++){
bdd_mgrs[i].extmanager.his = InitHistory(bdd_mgrs[i].extmanager.varmap.varcnt);
bdd_ev[i] = utilities[i]*CalcProbability(bdd_mgrs[i].extmanager, bdd_mgrs[i].root);
if (_debug) fprintf(stderr,"Utility for BDD %i is %g.\n", i, bdd_ev[i]);
ReInitHistory(bdd_mgrs[i].extmanager.his, bdd_mgrs[i].extmanager.varmap.varcnt);
}
// Make a list of all decisions with the BDDs they appear in
if (_debug) fprintf(stderr,"Making list of decisions with related BDDs\n");
if (_debug) fprintf(stderr,"There are %i vars.\n",globalvars.varcnt);
for(i=0;i<globalvars.varcnt;i++){
if (_debug) fprintf(stderr,"Variable %i", i);
if (globalvars.ivalue[i] == 1) {
if (_debug) fprintf(stderr," is a decision, affecting bdds");
decision = &decs[nb_dec_vars++];
decision->var = i;
decision->nb_rel_bdds = 0;
decision->alloc_rel_bdds = 8;
decision->rel_bdds = (int*) malloc(sizeof(int)*8);
decision->rel_bdds_var = (int*)malloc(sizeof(int)*8);
for(j=0;j<nb_bdds;j++){
index = GetNamedVarIndex(bdd_mgrs[j].extmanager.varmap,globalvars.vars[i]);
if(index>=0){
if (_debug) fprintf(stderr," %i", j);
bdd_mgrs[j].extmanager.varmap.dvalue[index] = globalvars.dvalue[i];
if(decision->nb_rel_bdds == decision->alloc_rel_bdds){
// increase array size
decision->alloc_rel_bdds = 2*decision->alloc_rel_bdds;
decision->rel_bdds = (int*) realloc(decision->rel_bdds,sizeof(int)*decision->alloc_rel_bdds);
decision->rel_bdds_var = (int*) realloc(decision->rel_bdds_var,sizeof(int)*decision->alloc_rel_bdds);
}
decision->rel_bdds[decision->nb_rel_bdds] = j;
decision->rel_bdds_var[decision->nb_rel_bdds] = index;
decision->nb_rel_bdds++;
}
}
}else{
if (_debug) fprintf(stderr," is not a decision, affecting bdds");
for(j=0;j<nb_bdds;j++){
index = GetNamedVarIndex(bdd_mgrs[j].extmanager.varmap,globalvars.vars[i]);
if(index>=0){
if (_debug) fprintf(stderr," %i", j);
bdd_mgrs[j].extmanager.varmap.dvalue[index] = globalvars.dvalue[i];
}
}
}
if (_debug) fprintf(stderr,".\n");
}
if (_debug) fprintf(stderr,"Starting Search\n");
if (_debug) fprintf(stderr,"There are %i decisions.\n",nb_dec_vars);
do{
changed = 0;
if (_debug) fprintf(stderr,"New Iteration\n");
for(i=0;i<nb_dec_vars;i++){
new_strategy = 1-globalvars.dvalue[decs[i].var];
difference = 0;
for(j=0;j<decs[i].nb_rel_bdds;j++){
index = decs[i].rel_bdds[j];
bdd_mgrs[index].extmanager.varmap.dvalue[decs[i].rel_bdds_var[j]] = new_strategy;
bdd_ev_temp[index] = utilities[index]*CalcProbability(bdd_mgrs[index].extmanager, bdd_mgrs[index].root);
ReInitHistory(bdd_mgrs[index].extmanager.his, bdd_mgrs[index].extmanager.varmap.varcnt);
if (_debug) fprintf(stderr,"Utility for BDD %i changed from %g to %g.\n", index, bdd_ev[index],bdd_ev_temp[index]);
difference += bdd_ev_temp[index] - bdd_ev[index];
}
if(difference>0){
// it's an improvement
globalvars.dvalue[decs[i].var] = new_strategy;
changed = 1;
for(j=0;j<decs[i].nb_rel_bdds;j++){
bdd_ev[decs[i].rel_bdds[j]] = bdd_ev_temp[decs[i].rel_bdds[j]];
}
if (_debug) fprintf(stderr,"Changing decision %i to improve %g.\n",decs[i].var,difference);
}else{
// it's not an improvement, reset
for(j=0;j<decs[i].nb_rel_bdds;j++){
bdd_mgrs[decs[i].rel_bdds[j]].extmanager.varmap.dvalue[decs[i].rel_bdds_var[j]] = 1-new_strategy;
}
}
}
}while(changed);
free(decs);
free(bdd_ev_temp);
difference = 0;
for(i=0;i<nb_bdds;i++){
difference += bdd_ev[i];
}
free(bdd_ev);
printf("expected_value(%g).\n", difference);
}
double expected_value(extmanager* MyManager, DdNode **forest, double* utilities){
int curbdd = 0;
DdNode *bdd = forest[0];
double sum = 0;
double prob = 0;
do {
prob = CalcProbability(*MyManager, bdd);
//printf("probability(%e).\n", prob);
sum += (*utilities) * prob;
//printf("sum is %e.\n", sum);
curbdd++;
bdd = forest[curbdd];
utilities++;
} while(bdd != NULL);
ReInitHistory(MyManager->his, MyManager->varmap.varcnt);
//printf("final sum is %e.\n", sum);
return sum;
}
void print_strategy(namedvars varmap){
int i;
for(i = 0; i < varmap.varcnt; i++){
if (varmap.ivalue[i] == 1) {
// it's a decision, print it
// if it contains an '_', it must be quoted,
// otherwise don't quote because it must parsed as an integer in prolog
if(strchr(varmap.vars[i]+1,'_')==NULL){
if (_debug) fprintf(stderr,"strategy(%s,%g).\n",varmap.vars[i]+1, varmap.dvalue[i]);
printf("strategy(%s,%g).\n",varmap.vars[i]+1, varmap.dvalue[i]);
}else{
if (_debug) fprintf(stderr,"strategy('%s',%g).\n",varmap.vars[i]+1, varmap.dvalue[i]);
printf("strategy('%s',%g).\n",varmap.vars[i]+1, varmap.dvalue[i]);
}
}
}
}
// new manager for bdd forest needs very low memory requirements! -l
void newManager(extmanager* MyManager, bddfileheader fileheader, int nbManagers){
MyManager->manager;
if (_debug) fprintf(stderr,"Creating new BDD manager.\n\n");
if (_debug) fprintf(stderr,"Setting BDD manager memory consumption to %i.\n", max(1024,(512*1024*1024)/nbManagers));
MyManager->manager = Cudd_Init((unsigned int)fileheader.varcnt, 0,
(unsigned int)max(32,CUDD_UNIQUE_SLOTS/nbManagers),
(unsigned int)max(512,CUDD_CACHE_SLOTS/nbManagers),
(unsigned int)max(5000,(1024*1024*1024)/nbManagers));
Cudd_AutodynEnable(MyManager->manager, CUDD_REORDER_GROUP_SIFT);
//Cudd_SetMaxCacheHard(MyManager->manager, 1024*1024*1024);
//Cudd_SetLooseUpTo(MyManager->manager, 1024*1024*512);
if (_debug) Cudd_EnableReorderingReporting(MyManager->manager);
MyManager->t = HIGH(MyManager->manager);
MyManager->f = LOW(MyManager->manager);
MyManager->varmap = InitNamedVars(fileheader.varcnt, fileheader.varstart);
if (_debug) Cudd_PrintInfo(MyManager->manager,stderr);
MyManager->his = InitHistory(fileheader.varcnt);
}
int printTime(void){
struct tm *current;
time_t now;
time(&now);
current = localtime(&now);
fprintf(stderr, "%i:%i:%i: ", current->tm_hour, current->tm_min, current->tm_sec);
}
bdd_mgr* generateIndependentBDDForest(bddfileheader fileheader) {
int i;
int icomment, maxlinesize, icur, iline, curinter, iequal;
DdNode *Line;
bdd_mgr * bdd_mgrs;
char buf, *inputline, *filename, *subl;
bddfileheader interfileheader;
// Initialization of intermediate steps
//Guy: +1 to delimit array????
bdd_mgrs = (bdd_mgr *) malloc(sizeof(bdd_mgr) * (fileheader.intercnt+1));
for (icur = 0; icur < fileheader.intercnt+1; icur++) {
bdd_mgrs[icur].extmanager.manager = NULL;
bdd_mgrs[icur].root = NULL;
}
// Read file data
interfileheader.inputfile = NULL;
filename = NULL; // For nested files
iequal = 0; // Flag for encountered = sign
icur = 0; // Pointer for inputline buffer location
iline = 5; // Current file line (first after header)
icomment = 0; // Flag for comments
maxlinesize = 80; // inputline starting buffer size
inputline = (char *) malloc(sizeof(char) * maxlinesize);
while(!feof(fileheader.inputfile)) {
fread(&buf, 1, 1, fileheader.inputfile);
if (buf == ';' || buf == '%' || buf == '$') icomment = 1;
if (buf == '\n') {
if (icomment) icomment = 0;
if (iequal > 1) {
fprintf(stderr, "Error at line: %i. Line contains more than 1 equal(=) signs.\n", iline);
fclose(fileheader.inputfile);
free(bdd_mgrs);
free(inputline);
return NULL;
} else iequal = 0;
if (icur > 0) {
inputline[icur] = '\0';
if (inputline[0] != 'L') {
fprintf(stderr, "Error at line: %i. Intermediate results should start with L.\n", iline);
fclose(fileheader.inputfile);
free(bdd_mgrs);
free(inputline);
return NULL;
}
curinter = getInterBDD(inputline);
if (curinter == -1) {
if (fileheader.version < 2) {
if (inputline[0] == 'L' && IsPosNumber(inputline + 1)) {
curinter = atoi(inputline + 1) - 1;
if (curinter > -1 && curinter < fileheader.intercnt && bdd_mgrs[curinter].extmanager.manager != NULL) {
if (_debug) fprintf(stderr, "Returned: %s\n", inputline);
fclose(fileheader.inputfile);
free(inputline);
//changed: just return every intermediate BDD
return bdd_mgrs;
} else {
fprintf(stderr, "Error at line: %i. Return result asked doesn't exist.\n", iline);
fclose(fileheader.inputfile);
free(bdd_mgrs);
free(inputline);
return NULL;
}
} else {
fprintf(stderr, "Error at line: %i. Invalid intermediate result format.\n", iline);
fclose(fileheader.inputfile);
free(bdd_mgrs);
free(inputline);
return NULL;
}
} else {
// Support for forest
maxlinesize = 10;
iline = -1;
for (subl = strtok(inputline, ","); subl != NULL; subl = strtok(NULL, ",")) {
if (subl[0] == 'L' && IsPosNumber(subl + 1)) {
curinter = atoi(subl + 1) - 1;
if (curinter > -1 && curinter < fileheader.intercnt && bdd_mgrs[curinter].extmanager.manager != NULL) {
iline++;
if (iline >= (maxlinesize - 1)) {
maxlinesize *= 2;
}
} else {
fprintf(stderr, "Error at line: %i. Return result asked(%s) doesn't exist.\n", iline, subl);
fclose(fileheader.inputfile);
free(bdd_mgrs);
free(inputline);
free(subl);
return NULL;
}
} else {
fprintf(stderr, "Error at line: %i. Invalid intermediate result format.\n", iline);
fclose(fileheader.inputfile);
free(bdd_mgrs);
free(inputline);
free(subl);
return NULL;
}
}
if (_debug) fprintf(stderr, "Returned: %s\n", inputline);
fclose(fileheader.inputfile);
free(inputline);
free(subl);
iline++;
//changed: just return every intermediate BDD
return bdd_mgrs;
}
} else if (curinter > -1 && curinter < fileheader.intercnt && bdd_mgrs[curinter].extmanager.manager == NULL) {
if (_debug) fprintf(stderr, "%i %s\n", curinter, inputline);
if (_debug) printTime();
if (_debug) fprintf(stderr, "At line %i reading %s\n", (curinter+1), inputline);
filename = getFileName(inputline);
if (filename == NULL) {
fprintf(stderr, "Error at line: %i. A forest of independent BDDs cannot have formulas.\n", iline);
fclose(fileheader.inputfile);
free(bdd_mgrs);
free(inputline);
free(subl);
return NULL;
} else {
interfileheader = ReadFileHeader(filename);
if (interfileheader.inputfile == NULL) {
//Line = simpleBDDload(manager, &varmap, filename);
Line = NULL;
} else {
newManager(&(bdd_mgrs[curinter].extmanager),interfileheader,fileheader.intercnt);
Line = FileGenerateBDD(bdd_mgrs[curinter].extmanager.manager, bdd_mgrs[curinter].extmanager.varmap, interfileheader);
// for(i = 0; i<bdd_mgrs[curinter].extmanager.varmap.varcnt;i++){
// AddNamedVar(globalvars, bdd_mgrs[curinter].extmanager.varmap.vars[i]);
// }
//Cudd_EnableGarbageCollection(bdd_mgrs[curinter].manager->manager);
if (_debug) Cudd_PrintInfo(bdd_mgrs[curinter].extmanager.manager,stderr);
}
if (Line == NULL) fprintf(stderr, "Error at line: %i. Error in nested BDD file: %s.\n", iline, filename);
free(filename);
filename = NULL;
interfileheader.inputfile = NULL;
}
if (Line == NULL) {
fclose(fileheader.inputfile);
free(bdd_mgrs);
free(inputline);
return NULL;
}
bdd_mgrs[curinter].root = Line;
icur = 0;
} else if (curinter > -1 && curinter < fileheader.intercnt && bdd_mgrs[curinter].extmanager.manager != NULL) {
fprintf(stderr, "Error at line: %i. Intermediate results can't be overwritten.\n", iline);
fclose(fileheader.inputfile);
free(bdd_mgrs);
free(inputline);
return NULL;
} else {
fprintf(stderr, "Error at line: %i. Intermediate result asked doesn't exist.\n", iline);
fclose(fileheader.inputfile);
free(bdd_mgrs);
free(inputline);
return NULL;
}
}
iline++;
} else if (buf != ' ' && buf != '\t' && !icomment) {
if (buf == '=') iequal++;
inputline[icur] = buf;
icur += 1;
if (icur == _maxbufsize) {
fprintf(stderr, "Error: Maximum buffer size(%i) exceeded.\n", _maxbufsize);
fclose(fileheader.inputfile);
free(bdd_mgrs);
free(inputline);
return NULL;
}
while (icur > maxlinesize - 1) {
maxlinesize *= 2;
inputline = (char *) realloc(inputline, sizeof(char) * maxlinesize);
}
}
}
fprintf(stderr, "Error, file either doesn't end with a blank line or no return result was asked.\n");
fclose(fileheader.inputfile);
free(bdd_mgrs);
free(inputline);
return NULL;
}
int LoadVariableDataForForest(namedvars varmap, char *filename) {
FILE *data;
char *dataread, buf, *varname, *dynvalue;
double dvalue = 0.0;
int icur = 0, maxbufsize = 10, hasvar = 0, index = 0, idat = 0, ivalue = 0;
dynvalue = NULL;
if ((data = fopen(filename, "r")) == NULL) {
perror(filename);
return -1;
}
dataread = (char *) malloc(sizeof(char) * maxbufsize);
while(!feof(data)) {
fread(&buf, 1, 1, data);
if ((buf == '\n') && icur == 0) {
// ignore empty lines
} else if (buf == '\n') {
dataread[icur] = '\0';
icur = 0;
buf = ' ';
if (dataread[0] == '@') {
if (hasvar) {
AddNamedVarAt(varmap,varname,index);
varmap.loaded[index] = 1;
varmap.dvalue[index] = dvalue;
varmap.ivalue[index] = ivalue;
if (varmap.dynvalue[index] != NULL) {
free(varmap.dynvalue[index]);
varmap.dynvalue[index] = NULL;
}
if (dynvalue != NULL) {
varmap.dynvalue[index] = (void *) malloc(sizeof(char) * (strlen(dynvalue) + 1));
strcpy(varmap.dynvalue[index], dynvalue);
free(dynvalue);
dynvalue = NULL;
}
index++;
dvalue = 0.0;
ivalue = 0;
free(varname);
}
varname = (char *) malloc(sizeof(char) * strlen(dataread));
strcpy(varname, dataread + 1);
hasvar = 1;
idat = 0;
} else {
if (hasvar >= 0) {
switch(idat) {
case 0:
if (IsRealNumber(dataread)) dvalue = atof(dataread);
else {
fprintf(stderr, "Error at file: %s. Variable: %s can't have non real value: %s.\n", filename, varname, dataread);
fclose(data);
free(varname);
free(dataread);
return -2;
}
idat++;
break;
case 1:
if (IsNumber(dataread)) ivalue = atoi(dataread);
else {
fprintf(stderr, "Error at file: %s. Variable: %s can't have non integer value: %s.\n", filename, varname, dataread);
fclose(data);
free(varname);
free(dataread);
return -2;
}
idat++;
break;
case 2:
dynvalue = malloc(sizeof(char) * (strlen(dataread) + 1));
strcpy(dynvalue, dataread);
break;
}
}
}
} else {
dataread[icur] = buf;
icur++;
if (icur == _maxbufsize) {
fprintf(stderr, "Error: Maximum buffer size(%i) exceeded.\n", _maxbufsize);
fclose(data);
free(varname);
free(dataread);
return -2;
}
while (icur > maxbufsize - 1) {
maxbufsize *= 2;
dataread = (char *) realloc(dataread, sizeof(char) * maxbufsize);
}
}
}
if (hasvar) {
AddNamedVarAt(varmap,varname,index);
varmap.loaded[index] = 1;
varmap.dvalue[index] = dvalue;
varmap.ivalue[index] = ivalue;
if (varmap.dynvalue[index] != NULL) {
free(varmap.dynvalue[index]);
varmap.dynvalue[index] = NULL;
}
if (dynvalue != NULL) {
varmap.dynvalue[index] = (void *) malloc(sizeof(char) * (strlen(dynvalue) + 1));
strcpy(varmap.dynvalue[index], dynvalue);
free(dynvalue);
}
index++;
free(varname);
}
fclose(data);
free(dataread);
return 0;
}
///////////////////////
// Stop Added by Guy //
///////////////////////
/* Shell Parameters handling */
int argtype(const char *arg) {
if (strcmp(arg, "-l") == 0 || strcmp(arg, "--load") == 0) return 0;
if (strcmp(arg, "-e") == 0 || strcmp(arg, "--export") == 0) return 2;
if (strcmp(arg, "-m") == 0 || strcmp(arg, "--method") == 0) return 3;
if (strcmp(arg, "-i") == 0 || strcmp(arg, "--input") == 0) return 4;
if (strcmp(arg, "-h") == 0 || strcmp(arg, "--help") == 0) return 5;
if (strcmp(arg, "-d") == 0 || strcmp(arg, "--debug") == 0) return 6;
if (strcmp(arg, "-id") == 0 || strcmp(arg, "--queryid") == 0) return 7;
if (strcmp(arg, "-t") == 0 || strcmp(arg, "--timeout") == 0) return 8;
if (strcmp(arg, "-sd") == 0 || strcmp(arg, "--savedump") == 0) return 9;
if (strcmp(arg, "-sl") == 0 || strcmp(arg, "--slope") == 0) return 10;
if (strcmp(arg, "-o") == 0 || strcmp(arg, "--online") == 0) return 11;
if (strcmp(arg, "-bs") == 0 || strcmp(arg, "--bufsize") == 0) return 12;
if (strcmp(arg, "-pid") == 0 || strcmp(arg, "--pid") == 0) return 13;
if (strcmp(arg, "-ord") == 0 || strcmp(arg, "--order") == 0) return 14;
if (strcmp(arg, "-u") == 0 || strcmp(arg, "--utilities") == 0) return 15;
if (strcmp(arg, "-if") == 0 || strcmp(arg, "--independent") == 0) return 16;
if (strcmp(arg, "-lo") == 0 || strcmp(arg, "--local") == 0) return 17;
if (strcmp(arg, "-dreorder") == 0 || strcmp(arg, "--disable-reorder") == 0) return 18;
if (strcmp(arg, "-sord") == 0 || strcmp(arg, "--static-order") == 0) return 19;
return -1;
}
void printhelp(int argc, char **arg) {
fprintf(stderr, "\n\nProbLogBDD Tool Version: %s\n\n", VERSION);
fprintf(stderr, "SimpleCUDD library (www.cs.kuleuven.be/~theo/tools/simplecudd.html)\n");
fprintf(stderr, "SimpleCUDD was developed at Katholieke Universiteit Leuven(www.kuleuven.be)\n");
fprintf(stderr, "Copyright Katholieke Universiteit Leuven 2008\n");
fprintf(stderr, "Authors: Theofrastos Mantadelis, Angelika Kimmig, Bernd Gutmann\n");
fprintf(stderr, "This package falls under the: Artistic License 2.0\n");
fprintf(stderr, "\nUsage: %s -l [filename] -i [filename] -o (-s(d) [filename] -e [filename] -m [method] -id [queryid] -sl [double]) (-t [seconds] -d -h)\n", arg[0]);
fprintf(stderr, "Generates and traverses a BDD\nMandatory parameters:\n");
fprintf(stderr, "\t-l [filename]\t->\tfilename to load supports two formats:\n\t\t\t\t\t\t1. script with generation instructions\n\t\t\t\t\t\t2. node dump saved file\n");
fprintf(stderr, "\t-i [filename]\t->\tfilename to input problem specifics (mandatory with file formats 1, 2)\n");
fprintf(stderr, "\t-o\t\t->\tgenerates the BDD in online mode instead from a file can be used instead of -l\n");
fprintf(stderr, "Optional parameters:\n");
fprintf(stderr, "\t-sd [filename]\t->\tfilename to save generated BDD in node dump format (fast loading, traverse valid only)\n");
fprintf(stderr, "\t-e [filename]\t->\tfilename to export generated BDD in dot format\n");
ProbLog Distribution
2010-08-27 16:17:01 +01:00
fprintf(stderr, "\t-m [method]\t->\tthe calculation method to be used: none(default), [p]robability, [g]radient, [l]ine search, [o]nline\n");
New ProbLog Distribution Version - all
2010-08-26 13:44:10 +01:00
fprintf(stderr, "\t-id [queryid]\t->\tthe queries identity name (used by gradient) default: %s\n", arg[0]);
fprintf(stderr, "\t-sl [double]\t->\tthe sigmoid slope (used by gradient) default: 1.0\n");
fprintf(stderr, "\t-if \t\t->\tbuild a forest of -independent- BDDs where each BDD is in a different manager. \n");
fprintf(stderr, "\t-u [filename]\t->\tfilename where a list of utilities can be found. \n");
fprintf(stderr, "\t-lo \t\t->\t do local strategy search. \n");
fprintf(stderr, "Extra parameters:\n");
fprintf(stderr, "\t-t [seconds]\t->\tthe seconds (int) for BDD generation timeout default 0 = no timeout\n");
fprintf(stderr, "\t-pid [pid]\t->\ta process id (int) to check for termination default 0 = no process to check\n");
fprintf(stderr, "\t-bs [bytes]\t->\tthe bytes (int) to use as a maximum buffer size to read files default 0 = no max\n");
fprintf(stderr, "\t-ord [filename]\t->\tUse the [filename] to define a specific final BDD variable order\n");
fprintf(stderr, "\t-dreorder\t->\tDiseable BDD dynamic variable ordering\n");
fprintf(stderr, "\t-sord [filename]\t->\tDefine a static ordering within [filename]\n");
fprintf(stderr, "\t-d\t\t->\tRun in debug mode (gives extra messages in stderr)\n");
fprintf(stderr, "\t-h\t\t->\tHelp (displays this message)\n");
fprintf(stderr, "Extra notes:\nSupports a forest of BDDs in one shared BDD.\nSelected computational methods will be applied to each BDD seperately.\nFile operations will be applied only to the first BDD.\n");
fprintf(stderr, "\nExample: %s -l testbdd -i input.txt -m g -id testbdd\n", arg[0]);
}
parameters loadparam(int argc, char **arg) {
int i;
parameters params;
params.loadfile = -1;
params.savedfile = -1;
params.exportfile = -1;
params.method = 0;
params.inputfile = -1;
params.debug = 0;
params.errorcnt = 0;
params.queryid = 0;
params.timeout = 0;
params.sigmoid_slope = 1.0;
params.online = 0;
params.maxbufsize = 0;
params.ppid = NULL;
params.orderfile = -1;
params.utilfile = -1;
params.independent_forest = -1;
params.local_search = -1;
params.error = (int *) malloc(argc * sizeof(int));
params.dynreorder = 1;
params.staticorder = -1;
for (i = 1; i < argc; i++) {
switch(argtype(arg[i])) {
case 0:
if (argc > i + 1) {
i++;
params.loadfile = i;
} else {
params.error[params.errorcnt] = i;
params.errorcnt++;
}
break;
case 2:
if (argc > i + 1) {
i++;
params.exportfile = i;
} else {
params.error[params.errorcnt] = i;
params.errorcnt++;
}
break;
case 3:
if (argc > i + 1) {
i++;
params.method = i;
} else {
params.error[params.errorcnt] = i;
params.errorcnt++;
}
break;
case 4:
if (argc > i + 1) {
i++;
params.inputfile = i;
} else {
params.error[params.errorcnt] = i;
params.errorcnt++;
}
break;
case 5:
printhelp(argc, arg);
break;
case 6:
params.debug = 1;
break;
case 7:
if (argc > i + 1) {
i++;
params.queryid = i;
} else {
params.error[params.errorcnt] = i;
params.errorcnt++;
}
break;
case 8:
if ((argc > i + 1) && (IsPosNumber(arg[i + 1]))) {
i++;
params.timeout = atoi(arg[i]);
} else {
params.error[params.errorcnt] = i;
params.errorcnt++;
}
break;
case 9:
if (argc > i + 1) {
i++;
params.savedfile = i;
} else {
params.error[params.errorcnt] = i;
params.errorcnt++;
}
break;
case 10:
if ((argc > i + 1) && (IsRealNumber(arg[i + 1]))) {
i++;
params.sigmoid_slope = atof(arg[i]);
} else {
params.error[params.errorcnt] = i;
params.errorcnt++;
}
break;
case 11:
params.online = 1;
break;
case 12:
if ((argc > i + 1) && (IsPosNumber(arg[i + 1]))) {
i++;
params.maxbufsize = atoi(arg[i]);
} else {
params.error[params.errorcnt] = i;
params.errorcnt++;
}
break;
case 13:
if ((argc > i + 1) && (IsPosNumber(arg[i + 1]))) {
i++;
params.ppid = (char *) malloc(sizeof(char) * (strlen(arg[i]) + 1));
strcpy(params.ppid, arg[i]);
} else {
params.error[params.errorcnt] = i;
params.errorcnt++;
}
break;
case 14:
if (argc > i + 1) {
i++;
params.orderfile = i;
} else {
params.error[params.errorcnt] = i;
params.errorcnt++;
}
break;
case 15:
if (argc > i + 1) {
i++;
params.utilfile = i;
} else {
params.error[params.errorcnt] = i;
params.errorcnt++;
}
break;
case 16:
params.independent_forest = i;
break;
case 17:
params.local_search = i;
break;
case 18:
params.dynreorder = -1;
break;
case 19:
if (argc > i + 1) {
i++;
params.staticorder = i;
} else {
params.error[params.errorcnt] = i;
params.errorcnt++;
}
break;
default:
params.error[params.errorcnt] = i;
params.errorcnt++;
break;
}
}
return params;
}
/* Error Handlers */
void handler(int num) {
fprintf(stderr, "Error: Timeout %i exceeded.\n", params.timeout);
exit(-1);
}
void pidhandler(int num) {
char *s;
if (params.timeout > 0) {
params.timeout -= 5;
if (params.timeout <= 0) {
fprintf(stderr, "Error: Timeout exceeded.\n");
exit(-1);
}
}
s = (char *) malloc(sizeof(char) * (19 + strlen(params.ppid)));
strcpy(s, "ps "); strcat(s, params.ppid); strcat(s, " >/dev/null");
if (system(s) != 0) exit(4);
signal(SIGALRM, pidhandler);
alarm(5);
free(s);
}
void termhandler(int num) {
exit(3);
}
/* Debugging traverse function */
void myexpand(extmanager MyManager, DdNode *Current) {
DdNode *h, *l;
hisnode *Found;
char *curnode;
curnode = GetNodeVarNameDisp(MyManager.manager, MyManager.varmap, Current);
printf("%s\n", curnode);
if ((Current != MyManager.t) && (Current != MyManager.f) &&
((Found = GetNode(MyManager.his, MyManager.varmap.varstart, Current)) == NULL)) {
l = LowNodeOf(MyManager.manager, Current);
h = HighNodeOf(MyManager.manager, Current);
printf("l(%s)->", curnode);
myexpand(MyManager, l);
printf("h(%s)->", curnode);
myexpand(MyManager, h);
AddNode(MyManager.his, MyManager.varmap.varstart, Current, 0.0, 0, NULL);
}
}
/* Angelicas Algorithm */
double CalcProbability(extmanager MyManager, DdNode *Current) {
DdNode *h, *l;
hisnode *Found;
char *curnode, *dynvalue;
double lvalue, hvalue, tvalue;
density_integral dynvalue_parsed;
if (params.debug) {
curnode = GetNodeVarNameDisp(MyManager.manager, MyManager.varmap, Current);
fprintf(stderr, "%s\n", curnode);
}
// base cases: 0 and 1 terminal
if (Current == MyManager.t) return 1.0;
if (Current == MyManager.f) return 0.0;
// case: node is in cache
if ((Found = GetNode(MyManager.his, MyManager.varmap.varstart, Current)) != NULL) {
return Found->dvalue;
}
// case: node is not in cache
l = LowNodeOf(MyManager.manager, Current);
h = HighNodeOf(MyManager.manager, Current);
if (params.debug) fprintf(stderr, "l(%s)->", curnode);
lvalue = CalcProbability(MyManager, l);
if (params.debug) fprintf(stderr, "h(%s)->", curnode);
hvalue = CalcProbability(MyManager, h);
dynvalue = (char*) MyManager.varmap.dynvalue[GetIndex(Current) - MyManager.varmap.varstart];
if (dynvalue == NULL) {
// no dynvalue, node is regular probabilistic fact
tvalue = MyManager.varmap.dvalue[GetIndex(Current) - MyManager.varmap.varstart];
} else {
// there is a dynvalue, node is continuous fact
curnode = GetNodeVarNameDisp(MyManager.manager, MyManager.varmap, Current);
dynvalue_parsed = parse_density_integral_string(dynvalue, curnode);
if (params.debug) fprintf(stderr, " cont low=%f high=%f mu=%f sigma=%f\n->", dynvalue_parsed.low, dynvalue_parsed.high, dynvalue_parsed.mu,exp(dynvalue_parsed.log_sigma) );
tvalue = cumulative_normal(dynvalue_parsed.low, dynvalue_parsed.high, dynvalue_parsed.mu, exp(dynvalue_parsed.log_sigma))/
(1-cumulative_normal_upper(dynvalue_parsed.low, dynvalue_parsed.mu, exp(dynvalue_parsed.log_sigma)));
}
tvalue = tvalue * hvalue + lvalue * (1.0 - tvalue);
AddNode(MyManager.his, MyManager.varmap.varstart, Current, tvalue, 0, NULL);
return tvalue;
}
/* Bernds Algorithm */
// type=0 regular probabilistic fact
// type=1 derive gradient for mu
// type=2 derive gradient for sigma
gradientpair CalcGradient(extmanager MyManager, DdNode *Current, int TargetVar, char *TargetPattern, int type) {
DdNode *h, *l;
hisnode *Found;
char *curnode, *dynvalue;
gradientpair lowvalue, highvalue, tvalue;
double this_probability;
double this_gradient;
double continuous_denominator,continuous_numerator;
double *gradient;
density_integral dynvalue_parsed;
if (params.debug) {
curnode = GetNodeVarNameDisp(MyManager.manager, MyManager.varmap, Current);
fprintf(stderr, "%s\n", curnode);
}
// base cases
if (Current == MyManager.t) {
tvalue.probability = 1.0;
tvalue.gradient = 0.0;
return tvalue;
}
if (Current == MyManager.f) {
tvalue.probability = 0.0;
tvalue.gradient = 0.0;
return tvalue;
}
//node is in cache
if ((Found = GetNode(MyManager.his, MyManager.varmap.varstart, Current)) != NULL) {
tvalue.probability = Found->dvalue;
tvalue.gradient = *((double *) Found->dynvalue);
return tvalue;
}
//inductive case
l = LowNodeOf(MyManager.manager, Current);
h = HighNodeOf(MyManager.manager, Current);
if (params.debug) fprintf(stderr, "l(%s)->", curnode);
lowvalue = CalcGradient(MyManager, l, TargetVar, TargetPattern,type);
if (params.debug) fprintf(stderr, "h(%s)->", curnode);
highvalue = CalcGradient(MyManager, h, TargetVar, TargetPattern,type);
dynvalue = (char*) MyManager.varmap.dynvalue[GetIndex(Current) - MyManager.varmap.varstart];
if (dynvalue == NULL) { // no dynvalue, it's a regular probabilistic fact
this_probability = sigmoid(MyManager.varmap.dvalue[GetIndex(Current) - MyManager.varmap.varstart], params.sigmoid_slope);
} else { // there is a dynvalue, it's a continuous fact! let's do the hybrid ProbLog magic here
curnode = GetNodeVarNameDisp(MyManager.manager, MyManager.varmap, Current);
dynvalue_parsed = parse_density_integral_string(dynvalue, curnode);
continuous_denominator = 1-cumulative_normal_upper(dynvalue_parsed.low, dynvalue_parsed.mu, exp(dynvalue_parsed.log_sigma));
continuous_numerator = cumulative_normal(dynvalue_parsed.low, dynvalue_parsed.high, dynvalue_parsed.mu, exp(dynvalue_parsed.log_sigma));
this_probability= continuous_numerator/continuous_denominator;
}
tvalue.probability = this_probability * highvalue.probability + (1 - this_probability) * lowvalue.probability;
tvalue.gradient = this_probability * highvalue.gradient + (1 - this_probability) * lowvalue.gradient;
// is this node, the one we want to calculcate the gradient for?
if ((GetIndex(Current) == TargetVar) ||
((TargetPattern != NULL) && patternmatch(TargetPattern, MyManager.varmap.vars[GetIndex(Current)]))) {
if (type == 0) {
// current node is normal probabilistic fact
this_gradient = this_probability * (1 - this_probability) * params.sigmoid_slope;
} else if (type == 1) {
// it's a continues fact and we need d/dmu
this_gradient = (cumulative_normal_dmu(dynvalue_parsed.low, dynvalue_parsed.high, dynvalue_parsed.mu, exp(dynvalue_parsed.log_sigma))*continuous_denominator+
continuous_numerator*cumulative_normal_upper_dmu(dynvalue_parsed.low, dynvalue_parsed.mu, exp(dynvalue_parsed.log_sigma))) /
(continuous_denominator*continuous_denominator);
} else if (type == 2) {
// it's a continues fact and we need d/dsigma
this_gradient = exp(dynvalue_parsed.log_sigma)*
(cumulative_normal_dsigma(dynvalue_parsed.low, dynvalue_parsed.high, dynvalue_parsed.mu, exp(dynvalue_parsed.log_sigma))*continuous_denominator +
continuous_numerator*cumulative_normal_upper_dsigma(dynvalue_parsed.low, dynvalue_parsed.mu, exp(dynvalue_parsed.log_sigma))) /
(continuous_denominator*continuous_denominator);
}
tvalue.gradient += (highvalue.probability - lowvalue.probability) * this_gradient;
}
gradient = (double *) malloc(sizeof(double));
*gradient = tvalue.gradient;
AddNode(MyManager.his, MyManager.varmap.varstart, Current, tvalue.probability, 0, gradient);
return tvalue;
}
char * extractpattern(char *thestr) {
char *p;
int i = 0, sl = strlen(thestr);
while((thestr[i] != '_') && (i < sl)) i++;
if (i == sl) return NULL;
i++;
p = (char *) malloc(sizeof(char) * (i + 2));
strncpy(p, thestr, i);
p[i] = '*';
p[i + 1] = '\0';
return p;
}
int patterncalculated(char *pattern, extmanager MyManager, int loc) {
int i;
if (pattern == NULL) return 0;
for (i = loc - 1; i > -1; i--)
if (patternmatch(pattern, MyManager.varmap.vars[i])) return 1;
return 0;
}
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