inital code for lifted knowledge compilation

This commit is contained in:
Tiago Gomes 2012-10-22 23:01:13 +01:00
parent b24922fd38
commit a8926fe38b
5 changed files with 811 additions and 3 deletions

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#include <fstream>
#include "LiftedCircuit.h"
LiftedCircuit::LiftedCircuit (const LiftedWCNF* lwcnf)
: lwcnf_(lwcnf)
{
root_ = 0;
Clauses ccc = lwcnf->clauses();
//ccc.erase (ccc.begin() + 3, ccc.end());
//Clause c2 = ccc.front();
//c2.removeLiteralByIndex (1);
//ccc.push_back (c2);
//compile (&root_, lwcnf->clauses());
compile (&root_, ccc);
cout << "done compiling..." << endl;
printToDot();
}
void
LiftedCircuit::printToDot (void)
{
const char* fileName = "circuit.dot" ;
ofstream out (fileName);
if (!out.is_open()) {
cerr << "error: cannot open file to write at " ;
cerr << "BayesBallGraph::exportToDotFile()" << endl;
abort();
}
out << "digraph {" << endl;
out << "ranksep=1" << endl;
printToDot (root_, out);
out << "}" << endl;
out.close();
}
void
LiftedCircuit::compile (
CircuitNode** follow,
const Clauses& clauses)
{
if (clauses.empty()) {
*follow = new TrueNode ();
return;
}
if (clauses.size() == 1 && clauses[0].isUnit()) {
*follow = new LeafNode (clauses[0]);
return;
}
if (tryUnitPropagation (follow, clauses)) {
return;
}
if (tryIndependence (follow, clauses)) {
return;
}
if (tryShannonDecomposition (follow, clauses)) {
return;
}
*follow = new FailNode (clauses);
}
bool
LiftedCircuit::tryUnitPropagation (
CircuitNode** follow,
const Clauses& clauses)
{
for (size_t i = 0; i < clauses.size(); i++) {
if (clauses[i].isUnit()) {
Clauses newClauses;
for (size_t j = 0; j < clauses.size(); j++) {
if (i != j) {
LiteralId lid = clauses[i].literals()[0].lid();
if (clauses[i].literals()[0].isPositive()) {
if (clauses[j].containsPositiveLiteral (lid) == false) {
Clause newClause = clauses[j];
newClause.removeNegativeLiterals (lid);
newClauses.push_back (newClause);
}
}
if (clauses[i].literals()[0].isNegative()) {
if (clauses[j].containsNegativeLiteral (lid) == false) {
Clause newClause = clauses[j];
newClause.removePositiveLiterals (lid);
newClauses.push_back (newClause);
}
}
}
}
stringstream explanation;
explanation << " UP of " << clauses[i];
AndNode* andNode = new AndNode (clauses, explanation.str());
compile (andNode->leftFollow(), {clauses[i]});
compile (andNode->rightFollow(), newClauses);
(*follow) = andNode;
return true;
}
}
return false;
}
bool
LiftedCircuit::tryIndependence (
CircuitNode** follow,
const Clauses& clauses)
{
if (clauses.size() == 1) {
return false;
}
for (size_t i = 0; i < clauses.size(); i++) {
bool indep = true;
TinySet<LiteralId> lids1 = clauses[i].lidSet();
for (size_t j = 0; j < clauses.size(); j++) {
TinySet<LiteralId> lids2 = clauses[j].lidSet();
if (((lids1 & lids2).empty() == false) && i != j) {
indep = false;
break;
}
}
if (indep == true) {
Clauses newClauses = clauses;
newClauses.erase (newClauses.begin() + i);
stringstream explanation;
explanation << " independence" ;
AndNode* andNode = new AndNode (clauses, explanation.str());
compile (andNode->leftFollow(), {clauses[i]});
compile (andNode->rightFollow(), newClauses);
(*follow) = andNode;
return true;
}
}
return false;
}
bool
LiftedCircuit::tryShannonDecomposition (
CircuitNode** follow,
const Clauses& clauses)
{
for (size_t i = 0; i < clauses.size(); i++) {
const Literals& literals = clauses[i].literals();
for (size_t j = 0; j < literals.size(); j++) {
if (literals[j].isGround (clauses[i].constr())) {
Literal posLit (literals[j], false);
Literal negLit (literals[j], true);
ConstraintTree* ct1 = new ConstraintTree (*clauses[i].constr());
ConstraintTree* ct2 = new ConstraintTree (*clauses[i].constr());
Clause c1 (ct1);
Clause c2 (ct2);
c1.addLiteral (posLit);
c2.addLiteral (negLit);
Clauses leftClauses = { c1 };
Clauses rightClauses = { c2 };
leftClauses.insert (leftClauses.end(), clauses.begin(), clauses.end());
rightClauses.insert (rightClauses.end(), clauses.begin(), clauses.end());
stringstream explanation;
explanation << " SD on " << literals[j];
OrNode* orNode = new OrNode (clauses, explanation.str());
(*follow) = orNode;
compile (orNode->leftFollow(), leftClauses);
compile (orNode->rightFollow(), rightClauses);
return true;
}
}
}
return false;
}
string
LiftedCircuit::escapeNode (const CircuitNode* node) const
{
stringstream ss;
ss << "\"" << node << "\"" ;
return ss.str();
}
void
LiftedCircuit::printToDot (CircuitNode* node, ofstream& os)
{
assert (node != 0);
static unsigned nrAndNodes = 0;
static unsigned nrOrNodes = 0;
if (dynamic_cast<AndNode*>(node) != 0) {
nrAndNodes ++;
AndNode* casted = dynamic_cast<AndNode*>(node);
os << escapeNode (node) << " [shape=box,label=\"" ;
const Clauses& clauses = node->clauses();
for (size_t i = 0; i < clauses.size(); i++) {
os << clauses[i] << "\\n" ;
}
os << "\"]" ;
os << endl;
os << "and" << nrAndNodes << " [label=\"\"]" << endl;
os << '"' << node << '"' << " -> " << "and" << nrAndNodes;
os << " [label=\"" << node->explanation() << "\"]" << endl;
os << "and" << nrAndNodes << " -> " ;
os << escapeNode (*casted->leftFollow()) << endl;
os << "and" << nrAndNodes << " -> " ;
os << escapeNode (*casted->rightFollow()) << endl;
printToDot (*casted->leftFollow(), os);
printToDot (*casted->rightFollow(), os);
} else if (dynamic_cast<OrNode*>(node) != 0) {
nrOrNodes ++;
OrNode* casted = dynamic_cast<OrNode*>(node);
os << escapeNode (node) << " [shape=box,label=\"" ;
const Clauses& clauses = node->clauses();
for (size_t i = 0; i < clauses.size(); i++) {
os << clauses[i] << "\\n" ;
}
os << "\"]" ;
os << endl;
os << "or" << nrOrNodes << " [label=\"\"]" << endl;
os << '"' << node << '"' << " -> " << "or" << nrOrNodes;
os << " [label=\"" << node->explanation() << "\"]" << endl;
os << "or" << nrOrNodes << " -> " ;
os << escapeNode (*casted->leftFollow()) << endl;
os << "or" << nrOrNodes << " -> " ;
os << escapeNode (*casted->rightFollow()) << endl;
printToDot (*casted->leftFollow(), os);
printToDot (*casted->rightFollow(), os);
} else if (dynamic_cast<LeafNode*>(node) != 0) {
os << escapeNode (node) << " [shape=box,label=\"" ;
os << node->clauses()[0] << "\\n" ;
os << "\"]" ;
os << endl;
} else if (dynamic_cast<TrueNode*>(node) != 0) {
os << escapeNode (node);
os << " [shape=box,label=\"\"]" ;
os << endl;
} else if (dynamic_cast<FailNode*>(node) != 0) {
os << escapeNode (node);
os << " [shape=box,style=filled,fillcolor=red,label=\"" ;
const Clauses& clauses = node->clauses();
for (size_t i = 0; i < clauses.size(); i++) {
os << clauses[i] << "\\n" ;
}
os << "\"]" ;
os << endl;
} else {
cout << "something really failled" << endl;
}
}

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#ifndef HORUS_LIFTEDCIRCUIT_H
#define HORUS_LIFTEDCIRCUIT_H
#include "LiftedWCNF.h"
class CircuitNode
{
public:
CircuitNode (const Clauses& clauses, string explanation = "")
: clauses_(clauses), explanation_(explanation) { }
const Clauses& clauses (void) { return clauses_; }
virtual double weight (void) const { return 0; }
string explanation (void) const { return explanation_; }
private:
Clauses clauses_;
string explanation_;
};
class AndNode : public CircuitNode
{
public:
AndNode (const Clauses& clauses, string explanation = "")
: CircuitNode (clauses, explanation),
leftFollow_(0), rightFollow_(0) { }
CircuitNode** leftFollow (void) { return &leftFollow_; }
CircuitNode** rightFollow (void) { return &rightFollow_; }
private:
CircuitNode* leftFollow_;
CircuitNode* rightFollow_;
};
class OrNode : public CircuitNode
{
public:
OrNode (const Clauses& clauses, string explanation = "")
: CircuitNode (clauses, explanation),
leftFollow_(0), rightFollow_(0) { }
CircuitNode** leftFollow (void) { return &leftFollow_; }
CircuitNode** rightFollow (void) { return &rightFollow_; }
private:
CircuitNode* leftFollow_;
CircuitNode* rightFollow_;
};
class SetAndNode : public CircuitNode
{
public:
private:
CircuitNode* follow_;
};
class SetOrNode : public CircuitNode
{
public:
private:
CircuitNode* follow_;
};
class IncExclNode : public CircuitNode
{
public:
private:
CircuitNode* xFollow_;
CircuitNode* yFollow_;
CircuitNode* zFollow_;
};
class LeafNode : public CircuitNode
{
public:
LeafNode (const Clause& clause) : CircuitNode ({clause}) { }
private:
};
class TrueNode : public CircuitNode
{
public:
TrueNode () : CircuitNode ({}) { }
private:
};
class FailNode : public CircuitNode
{
public:
FailNode (const Clauses& clauses) : CircuitNode (clauses) { }
private:
};
class LiftedCircuit
{
public:
LiftedCircuit (const LiftedWCNF* lwcnf);
void printToDot (void);
private:
void compile (CircuitNode** follow, const Clauses& clauses);
bool tryUnitPropagation (CircuitNode** follow, const Clauses& clauses);
bool tryIndependence (CircuitNode** follow, const Clauses& clauses);
bool tryShannonDecomposition (CircuitNode** follow, const Clauses& clauses);
string escapeNode (const CircuitNode*) const;
void printToDot (CircuitNode* node, ofstream&);
CircuitNode* root_;
const LiftedWCNF* lwcnf_;
};
#endif // HORUS_LIFTEDCIRCUIT_H

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#include "LiftedWCNF.h"
#include "ConstraintTree.h"
#include "Indexer.h"
bool
Literal::isGround (ConstraintTree* constr) const
{
if (logVars_.size() == 0) {
return true;
}
LogVarSet singletons = constr->singletons();
return singletons.contains (logVars_);
}
std::ostream& operator<< (ostream &os, const Literal& lit)
{
lit.negated_ ? os << "¬" : os << "" ;
lit.weight_ < 0.0 ? os << "λ" : os << "Θ" ;
os << lit.lid_ ;
if (lit.logVars_.empty() == false) {
os << "(" ;
for (size_t i = 0; i < lit.logVars_.size(); i++) {
if (i != 0) os << ",";
os << lit.logVars_[i];
}
os << ")" ;
}
return os;
}
bool
Clause::containsLiteral (LiteralId lid) const
{
for (size_t i = 0; i < literals_.size(); i++) {
if (literals_[i].lid() == lid) {
return true;
}
}
return false;
}
bool
Clause::containsPositiveLiteral (LiteralId lid) const
{
for (size_t i = 0; i < literals_.size(); i++) {
if (literals_[i].lid() == lid && literals_[i].isPositive()) {
return true;
}
}
return false;
}
bool
Clause::containsNegativeLiteral (LiteralId lid) const
{
for (size_t i = 0; i < literals_.size(); i++) {
if (literals_[i].lid() == lid && literals_[i].isNegative()) {
return true;
}
}
return false;
}
void
Clause::removeLiterals (LiteralId lid)
{
size_t i = 0;
while (i != literals_.size()) {
if (literals_[i].lid() == lid) {
literals_.erase (literals_.begin() + i);
} else {
i ++;
}
}
}
void
Clause::removePositiveLiterals (LiteralId lid)
{
size_t i = 0;
while (i != literals_.size()) {
if (literals_[i].lid() == lid && literals_[i].isPositive()) {
literals_.erase (literals_.begin() + i);
} else {
i ++;
}
}
}
void
Clause::removeNegativeLiterals (LiteralId lid)
{
size_t i = 0;
while (i != literals_.size()) {
if (literals_[i].lid() == lid && literals_[i].isNegative()) {
literals_.erase (literals_.begin() + i);
} else {
i ++;
}
}
}
TinySet<LiteralId>
Clause::lidSet (void) const
{
TinySet<LiteralId> lidSet;
for (size_t i = 0; i < literals_.size(); i++) {
lidSet.insert (literals_[i].lid());
}
return lidSet;
}
std::ostream& operator<< (ostream &os, const Clause& clause)
{
for (unsigned i = 0; i < clause.literals_.size(); i++) {
if (i != 0) os << " v " ;
os << clause.literals_[i];
}
if (clause.ct_->empty() == false) {
ConstraintTree copy (*clause.ct_);
copy.moveToTop (copy.logVarSet().elements());
os << " | " << copy.tupleSet();
}
return os;
}
LiftedWCNF::LiftedWCNF (const ParfactorList& pfList)
: pfList_(pfList), freeLiteralId_(0)
{
addIndicatorClauses (pfList);
addParameterClauses (pfList);
printFormulasToIndicators();
printClauses();
}
LiftedWCNF::~LiftedWCNF (void)
{
}
void
LiftedWCNF::addIndicatorClauses (const ParfactorList& pfList)
{
ParfactorList::const_iterator it = pfList.begin();
set<PrvGroup> allGroups;
while (it != pfList.end()) {
const ProbFormulas& formulas = (*it)->arguments();
for (size_t i = 0; i < formulas.size(); i++) {
if (Util::contains (allGroups, formulas[i].group()) == false) {
allGroups.insert (formulas[i].group());
ConstraintTree* tempConstr = new ConstraintTree (*(*it)->constr());
tempConstr->project (formulas[i].logVars());
Clause clause (tempConstr);
vector<LiteralId> lids;
for (size_t j = 0; j < formulas[i].range(); j++) {
clause.addLiteral (Literal (freeLiteralId_, formulas[i].logVars()));
lids.push_back (freeLiteralId_);
freeLiteralId_ ++;
}
clauses_.push_back (clause);
for (size_t j = 0; j < formulas[i].range() - 1; j++) {
for (size_t k = j + 1; k < formulas[i].range(); k++) {
ConstraintTree* tempConstr2 = new ConstraintTree (*(*it)->constr());
tempConstr2->project (formulas[i].logVars());
Clause clause2 (tempConstr2);
clause2.addAndNegateLiteral (Literal (clause.literals()[j]));
clause2.addAndNegateLiteral (Literal (clause.literals()[k]));
clauses_.push_back (clause2);
}
}
map_[formulas[i].group()] = lids;
}
}
++ it;
}
}
void
LiftedWCNF::addParameterClauses (const ParfactorList& pfList)
{
ParfactorList::const_iterator it = pfList.begin();
while (it != pfList.end()) {
Indexer indexer ((*it)->ranges());
vector<PrvGroup> groups = (*it)->getAllGroups();
while (indexer.valid()) {
LiteralId paramVarLid = freeLiteralId_;
Clause clause1 ((*it)->constr());
for (unsigned i = 0; i < groups.size(); i++) {
LiteralId lid = getLiteralId (groups[i], indexer[i]);
clause1.addAndNegateLiteral (Literal (lid, (*it)->argument(i).logVars()));
Clause tempClause ((*it)->constr());
tempClause.addAndNegateLiteral (Literal (paramVarLid, LogVars(), 1.0));
tempClause.addLiteral (Literal (lid, (*it)->argument(i).logVars()));
clauses_.push_back (tempClause);
}
clause1.addLiteral (Literal (paramVarLid, LogVars(), 1.0));
clauses_.push_back (clause1);
freeLiteralId_ ++;
++ indexer;
}
++ it;
}
}
void
LiftedWCNF::printClauses (void) const
{
for (unsigned i = 0; i < clauses_.size(); i++) {
cout << clauses_[i] << endl;
}
}
void
LiftedWCNF::printFormulasToIndicators (void) const
{
set<PrvGroup> allGroups;
ParfactorList::const_iterator it = pfList_.begin();
while (it != pfList_.end()) {
const ProbFormulas& formulas = (*it)->arguments();
for (size_t i = 0; i < formulas.size(); i++) {
if (Util::contains (allGroups, formulas[i].group()) == false) {
allGroups.insert (formulas[i].group());
cout << formulas[i] << " | " ;
ConstraintTree tempCt (*(*it)->constr());
tempCt.project (formulas[i].logVars());
cout << tempCt.tupleSet();
cout << " indicators => " ;
vector<LiteralId> indicators =
(map_.find (formulas[i].group()))->second;
cout << indicators << endl;
}
}
++ it;
}
}

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@ -0,0 +1,129 @@
#ifndef HORUS_LIFTEDWCNF_H
#define HORUS_LIFTEDWCNF_H
#include "ParfactorList.h"
using namespace std;
typedef long LiteralId;
class ConstraintTree;
class Literal
{
public:
Literal (LiteralId lid, const LogVars& lvs, double w = -1.0) :
lid_(lid), logVars_(lvs), weight_(w), negated_(false) { }
Literal (const Literal& lit, bool negated) :
lid_(lit.lid_), logVars_(lit.logVars_), weight_(lit.weight_), negated_(negated) { }
LiteralId lid (void) const { return lid_; }
double weight (void) const { return weight_; }
void negate (void) { negated_ = !negated_; }
bool isPositive (void) const { return negated_ == false; }
bool isNegative (void) const { return negated_; }
bool isGround (ConstraintTree* constr) const;
friend std::ostream& operator<< (ostream &os, const Literal& lit);
private:
LiteralId lid_;
LogVars logVars_;
double weight_;
bool negated_;
};
typedef vector<Literal> Literals;
class Clause
{
public:
Clause (ConstraintTree* ct) : ct_(ct) { }
void addLiteral (const Literal& l) { literals_.push_back (l); }
void addAndNegateLiteral (const Literal& l)
{
literals_.push_back (l);
literals_.back().negate();
}
bool containsLiteral (LiteralId lid) const;
bool containsPositiveLiteral (LiteralId lid) const;
bool containsNegativeLiteral (LiteralId lid) const;
void removeLiterals (LiteralId lid);
void removePositiveLiterals (LiteralId lid);
void removeNegativeLiterals (LiteralId lid);
const vector<Literal>& literals (void) const { return literals_; }
void removeLiteralByIndex (size_t idx) { literals_.erase (literals_.begin() + idx); }
ConstraintTree* constr (void) const { return ct_; }
ConstraintTree* constr (void) { return ct_; }
bool isUnit (void) const { return literals_.size() == 1; }
TinySet<LiteralId> lidSet (void) const;
friend std::ostream& operator<< (ostream &os, const Clause& clause);
private:
vector<Literal> literals_;
ConstraintTree* ct_;
};
typedef vector<Clause> Clauses;
class LiftedWCNF
{
public:
LiftedWCNF (const ParfactorList& pfList);
~LiftedWCNF (void);
const Clauses& clauses (void) const { return clauses_; }
void printClauses (void) const;
void printFormulasToIndicators (void) const;
private:
void addIndicatorClauses (const ParfactorList& pfList);
void addParameterClauses (const ParfactorList& pfList);
LiteralId getLiteralId (PrvGroup prvGroup, unsigned range)
{
assert (Util::contains (map_, prvGroup));
return map_[prvGroup][range];
}
Clauses clauses_;
unordered_map<PrvGroup,vector<LiteralId>> map_;
const ParfactorList& pfList_;
LiteralId freeLiteralId_;
};
#endif // HORUS_LIFTEDWCNF_H

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@ -23,10 +23,10 @@ CC=@CC@
CXX=@CXX@
# normal
CXXFLAGS= -std=c++0x @SHLIB_CXXFLAGS@ $(YAP_EXTRAS) $(DEFS) -D_YAP_NOT_INSTALLED_=1 -I$(srcdir) -I../../.. -I$(srcdir)/../../../include @CPPFLAGS@ -DNDEBUG
#CXXFLAGS= -std=c++0x @SHLIB_CXXFLAGS@ $(YAP_EXTRAS) $(DEFS) -D_YAP_NOT_INSTALLED_=1 -I$(srcdir) -I../../.. -I$(srcdir)/../../../include @CPPFLAGS@ -DNDEBUG
# debug
#CXXFLAGS= -std=c++0x @SHLIB_CXXFLAGS@ $(YAP_EXTRAS) $(DEFS) -D_YAP_NOT_INSTALLED_=1 -I$(srcdir) -I../../.. -I$(srcdir)/../../../include @CPPFLAGS@ -g -O0 -Wextra
CXXFLAGS= -std=c++0x @SHLIB_CXXFLAGS@ $(YAP_EXTRAS) $(DEFS) -D_YAP_NOT_INSTALLED_=1 -I$(srcdir) -I../../.. -I$(srcdir)/../../../include @CPPFLAGS@ -g -O0 -Wextra
#
@ -57,8 +57,10 @@ HEADERS = \
$(srcdir)/Horus.h \
$(srcdir)/Indexer.h \
$(srcdir)/LiftedBp.h \
$(srcdir)/LiftedCircuit.h \
$(srcdir)/LiftedUtils.h \
$(srcdir)/LiftedVe.h \
$(srcdir)/LiftedWCNF.h \
$(srcdir)/Parfactor.h \
$(srcdir)/ParfactorList.h \
$(srcdir)/ProbFormula.h \
@ -82,8 +84,10 @@ CPP_SOURCES = \
$(srcdir)/HorusCli.cpp \
$(srcdir)/HorusYap.cpp \
$(srcdir)/LiftedBp.cpp \
$(srcdir)/LiftedCircuit.h \
$(srcdir)/LiftedUtils.cpp \
$(srcdir)/LiftedVe.cpp \
$(srcdir)/LiftedWCNF.cpp \
$(srcdir)/Parfactor.cpp \
$(srcdir)/ParfactorList.cpp \
$(srcdir)/ProbFormula.cpp \
@ -91,7 +95,7 @@ CPP_SOURCES = \
$(srcdir)/Util.cpp \
$(srcdir)/Var.cpp \
$(srcdir)/VarElim.cpp \
$(srcdir)/WeightedBp.cpp \
$(srcdir)/WeightedBp.cpp
OBJS = \
BayesBall.o \
@ -105,8 +109,10 @@ OBJS = \
Histogram.o \
HorusYap.o \
LiftedBp.o \
LiftedCircuit.o \
LiftedUtils.o \
LiftedVe.o \
LiftedWCNF.o \
ProbFormula.o \
Parfactor.o \
ParfactorList.o \