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/********************* */
/*! \file cnf_proof.cpp
** \verbatim
** Original author: Liana Hadarean
** Major contributors: Morgan Deters
** Minor contributors (to current version): none
** This file is part of the CVC4 project.
** Copyright (c) 2009-2013 New York University and The University of Iowa
** See the file COPYING in the top-level source directory for licensing
** information.\endverbatim
**
** \brief [[ Add one-line brief description here ]]
**
** [[ Add lengthier description here ]]
** \todo document this file
**/
#include "proof/cnf_proof.h"
#include "proof/theory_proof.h"
#include "proof/proof_manager.h"
#include "prop/sat_solver_types.h"
#include "prop/minisat/minisat.h"
#include "prop/cnf_stream.h"
using namespace CVC4::prop;
namespace CVC4 {
CnfProof::CnfProof(CnfStream* stream)
: d_cnfStream(stream)
, d_theoryProof(NULL)
{}
TheoryProof* CnfProof::getTheoryProof() {
Assert (d_theoryProof);
return d_theoryProof;
}
void CnfProof::setTheoryProof(TheoryProof* theory_proof) {
Assert (d_theoryProof == NULL);
d_theoryProof = theory_proof;
}
void CnfProof::addInputClause(ClauseId id, const ::Minisat::Clause& clause) {
d_inputClauses.insert(std::make_pair(id, clause));
}
void CnfProof::addTheoryLemma(ClauseId id, const ::Minisat::Clause& clause) {
d_theoryLemmas.insert(std::make_pair(id, clause));
}
void CnfProof::addVariable(unsigned var) {
d_propVars.insert(var);
Expr atom = getAtom(var);
getTheoryProof()->addAtom(atom);
}
Expr CnfProof::getAtom(unsigned var) {
Minisat::Lit m_lit = Minisat::mkLit(var);
prop::SatLiteral sat_lit = prop::MinisatSatSolver::toSatLiteral(m_lit);
Expr atom = d_cnfStream->getNode(sat_lit).toExpr();
return atom;
}
void LFSCCnfProof::printAtomMapping(std::ostream& os, std::ostream& paren) {
for (VarSet::iterator it = d_propVars.begin();it != d_propVars.end(); ++it) {
Expr atom = getAtom(*it);
os << "(decl_atom ";
getTheoryProof()->printFormula(atom, os);
os << " (\\ " << ProofManager::getVarPrefix() <<*it << " (\\ " << ProofManager::getAtomPrefix() <<*it << "\n";
paren << ")))";
}
}
void LFSCCnfProof::printClauses(std::ostream& os, std::ostream& paren) {
printInputClauses(os, paren);
printTheoryLemmas(os, paren);
}
void LFSCCnfProof::printInputClauses(std::ostream& os, std::ostream& paren) {
for (IdToClause::const_iterator it = d_inputClauses.begin(); it != d_inputClauses.end(); ++it) {
ClauseId id = it->first;
const Minisat::Clause& clause = it->second;
os << " ;; input clause \n";
os << "(satlem _ _ ";
std::ostringstream clause_paren;
printClause(clause, os, clause_paren);
os << " (clausify_false trust)" << clause_paren.str();
os << "( \\ " << ProofManager::getInputClausePrefix() << id <<"\n";
paren << "))";
}
}
void LFSCCnfProof::printTheoryLemmas(std::ostream& os, std::ostream& paren) {
for (IdToClause::const_iterator it = d_inputClauses.begin(); it != d_inputClauses.end(); ++it) {
ClauseId id = it->first;
const Minisat::Clause& clause = it->second;
os << " ;; theory lemma \n";
os << "(satlem _ _ ";
std::ostringstream clause_paren;
printClause(clause, os, clause_paren);
os << " (clausify_false trust)" << clause_paren.str();
os << "( \\ " << ProofManager::getLemmaClausePrefix() << id <<"\n";
paren << "))";
}
}
void LFSCCnfProof::printClause(const Minisat::Clause& clause, std::ostream& os, std::ostream& paren) {
for (int i = 0; i < clause.size(); ++i) {
Minisat::Lit lit = clause[i];
unsigned var = Minisat::var(lit);
if (sign(lit)) {
os << "(asf _ _ _ " << ProofManager::getAtomPrefix()<< var <<" (\\ " << ProofManager::getLitPrefix() << Minisat::toInt(lit) << " ";
paren << ")";
} else {
os << "(ast _ _ _ " << ProofManager::getAtomPrefix()<< var <<" (\\ " << ProofManager::getLitPrefix() << Minisat::toInt(lit) << " ";
paren << ")";
}
}
}
} /* CVC4 namespace */
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