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/********************* */
/*! \file theory_proof.cpp
** \verbatim
** Original author: Liana Hadarean
** Major contributors: none
** 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/theory_proof.h"
using namespace CVC4;
TheoryProof::TheoryProof()
: d_atomSet()
, d_inputFormulas()
, d_termDeclarations()
, d_sortDeclarations()
, d_declarationCache()
{}
void TheoryProof::addAtom(Expr atom) {
d_atomSet.insert(atom);
Assert (atom.getKind() == kind::EQUAL);
addDeclaration(atom[0]);
addDeclaration(atom[1]);
}
void TheoryProof::assertFormula(Expr formula) {
d_inputFormulas.insert(formula);
addDeclaration(formula);
}
void TheoryProof::addDeclaration(Expr term) {
if (d_declarationCache.count(term))
return;
Type type = term.getType();
if (type.isSort())
d_sortDeclarations.insert(type);
if (term.getKind() == kind::APPLY_UF) {
Expr function = term.getOperator();
d_termDeclarations.insert(function);
} else if (term.isVariable()) {
Assert (type.isSort());
d_termDeclarations.insert(term);
}
// recursively declare all other terms
for (unsigned i = 0; i < term.getNumChildren(); ++i) {
addDeclaration(term[i]);
}
d_declarationCache.insert(term);
}
void LFSCTheoryProof::printTerm(Expr term, std::ostream& os) {
if (term.isVariable()) {
os << term;
return;
}
Assert (term.getKind() == kind::APPLY_UF);
Expr func = term.getOperator();
for (unsigned i = 0; i < term.getNumChildren(); ++i) {
os<< "(apply _ _ ";
}
os << func << " ";
for (unsigned i = 0; i < term.getNumChildren(); ++i) {
printTerm(term[i], os);
os << ")";
}
}
std::string toLFSCKind(Kind kind) {
switch(kind) {
case kind::OR : return "or";
case kind::AND: return "and";
case kind::XOR: return "xor";
case kind::EQUAL: return "=";
case kind::IMPLIES: return "impl";
case kind::NOT: return "not";
default:
Unreachable();
}
}
void LFSCTheoryProof::printFormula(Expr atom, std::ostream& os) {
// should make this more general and overall sane
Assert (atom.getType().isBoolean() && "Only printing booleans." );
Kind kind = atom.getKind();
// this is the only predicate we have
if (kind == kind::EQUAL) {
os << "(";
os <<"= ";
os << atom[0].getType() <<" ";
printTerm(atom[0], os);
os <<" ";
printTerm(atom[1], os);
os <<")";
} else if ( kind == kind::DISTINCT) {
os <<"(not (= ";
os << atom[0].getType() <<" ";
printTerm(atom[0], os);
os <<" ";
printTerm(atom[1], os);
os <<"))";
} else if ( kind == kind::OR ||
kind == kind::AND ||
kind == kind::XOR ||
kind == kind::IMPLIES ||
kind == kind::NOT) {
// print the boolean operators
os << "(";
os << toLFSCKind(kind);
if (atom.getNumChildren() > 2) {
std::ostringstream paren;
os << " ";
for (unsigned i =0; i < atom.getNumChildren(); ++i) {
printFormula(atom[i], os);
os << " ";
if (i < atom.getNumChildren() - 2) {
os << "("<< toLFSCKind(kind) << " ";
paren << ")";
}
}
os << paren.str() <<")";
} else {
// this is for binary and unary operators
for (unsigned i = 0; i < atom.getNumChildren(); ++i) {
os <<" ";
printFormula(atom[i], os);
}
os <<")";
}
} else if (kind == kind::CONST_BOOLEAN) {
if (atom.getConst<bool>())
os << "true";
else
os << "false";
}
else {
std::cout << kind << "\n";
Assert (false && "Unsupported kind");
}
}
void LFSCTheoryProof::printAssertions(std::ostream& os, std::ostream& paren) {
unsigned counter = 0;
for (ExprSet::const_iterator it = d_inputFormulas.begin(); it != d_inputFormulas.end(); ++it) {
os << "(% A" << counter++ << " (th_holds ";
printFormula(*it, os);
os << ")\n";
paren <<")";
}
}
void LFSCTheoryProof::printDeclarations(std::ostream& os, std::ostream& paren) {
// declaring the sorts
for (SortSet::const_iterator it = d_sortDeclarations.begin(); it != d_sortDeclarations.end(); ++it) {
os << "(% " << *it << " sort \n";
paren << ")";
}
// declaring the terms
for (ExprSet::const_iterator it = d_termDeclarations.begin(); it != d_termDeclarations.end(); ++it) {
Expr term = *it;
os << "(% " << term << " (term ";
paren <<")";
Type type = term.getType();
if (type.isFunction()) {
std::ostringstream fparen;
FunctionType ftype = (FunctionType)type;
std::vector<Type> args = ftype.getArgTypes();
args.push_back(ftype.getRangeType());
os << "(arrow ";
for (unsigned i = 0; i < args.size(); i++) {
Type arg_type = args[i];
Assert (arg_type.isSort());
os << arg_type << " ";
if (i < args.size() - 2) {
os << "(arrow ";
fparen <<")";
}
}
os << fparen.str() << "))\n";
} else {
Assert (term.isVariable());
Assert (type.isSort());
os << type << ")\n";
}
}
}
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