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/********************* */
/*! \file smt_engine.cpp
** \verbatim
** Original author: mdeters
** Major contributors: dejan
** Minor contributors (to current version): none
** This file is part of the CVC4 prototype.
** Copyright (c) 2009, 2010 The Analysis of Computer Systems Group (ACSys)
** Courant Institute of Mathematical Sciences
** New York University
** See the file COPYING in the top-level source directory for licensing
** information.\endverbatim
**
** \brief The main entry point into the CVC4 library's SMT interface.
**
** The main entry point into the CVC4 library's SMT interface.
**/
#include "smt/smt_engine.h"
#include "expr/command.h"
#include "expr/node_builder.h"
#include "util/output.h"
#include "util/exception.h"
#include "util/options.h"
#include "prop/prop_engine.h"
#include "theory/theory_engine.h"
using namespace CVC4::prop;
using CVC4::context::Context;
namespace CVC4 {
namespace smt {
/**
* This is an inelegant solution, but for the present, it will work.
* The point of this is to separate the public and private portions of
* the SmtEngine class, so that smt_engine.h doesn't
* #include "expr/node.h", which is a private CVC4 header (and can lead
* to linking errors due to the improper inlining of non-visible symbols
* into user code!).
*
* The "real" solution (that which is usually implemented) is to move
* ALL the implementation to SmtEnginePrivate and maintain a
* heap-allocated instance of it in SmtEngine. SmtEngine (the public
* one) becomes an "interface shell" which simply acts as a forwarder
* of method calls.
*/
class SmtEnginePrivate {
public:
/**
* Pre-process an Node. This is expected to be highly-variable,
* with a lot of "source-level configurability" to add multiple
* passes over the Node. TODO: may need to specify a LEVEL of
* preprocessing (certain contexts need more/less ?).
*/
static Node preprocess(SmtEngine& smt, TNode n);
/**
* Adds a formula to the current context.
*/
static void addFormula(SmtEngine& smt, TNode n);
};/* class SmtEnginePrivate */
}/* namespace CVC4::smt */
using ::CVC4::smt::SmtEnginePrivate;
SmtEngine::SmtEngine(ExprManager* em, const Options* opts) throw () :
d_ctxt(em->getContext()),
d_exprManager(em),
d_nodeManager(em->getNodeManager()),
d_options(opts) {
NodeManagerScope nms(d_nodeManager);
d_decisionEngine = new DecisionEngine;
// We have mutual dependancy here, so we add the prop engine to the theory
// engine later (it is non-essential there)
d_theoryEngine = new TheoryEngine(d_ctxt, opts);
d_propEngine = new PropEngine(opts, d_decisionEngine, d_theoryEngine, d_ctxt);
d_theoryEngine->setPropEngine(d_propEngine);
}
void SmtEngine::shutdown() {
d_propEngine->shutdown();
d_theoryEngine->shutdown();
d_decisionEngine->shutdown();
}
SmtEngine::~SmtEngine() {
NodeManagerScope nms(d_nodeManager);
shutdown();
delete d_propEngine;
delete d_theoryEngine;
delete d_decisionEngine;
}
void SmtEngine::doCommand(Command* c) {
NodeManagerScope nms(d_nodeManager);
c->invoke(this);
}
Node SmtEnginePrivate::preprocess(SmtEngine& smt, TNode n) {
return smt.d_theoryEngine->preprocess(n);
}
Result SmtEngine::check() {
Debug("smt") << "SMT check()" << std::endl;
return d_propEngine->checkSat();
}
Result SmtEngine::quickCheck() {
Debug("smt") << "SMT quickCheck()" << std::endl;
return Result(Result::VALIDITY_UNKNOWN);
}
void SmtEnginePrivate::addFormula(SmtEngine& smt, TNode n) {
Debug("smt") << "push_back assertion " << n << std::endl;
smt.d_propEngine->assertFormula(SmtEnginePrivate::preprocess(smt, n));
}
Result SmtEngine::checkSat(const BoolExpr& e) {
NodeManagerScope nms(d_nodeManager);
Debug("smt") << "SMT checkSat(" << e << ")" << std::endl;
SmtEnginePrivate::addFormula(*this, e.getNode());
Result r = check().asSatisfiabilityResult();
Debug("smt") << "SMT checkSat(" << e << ") ==> " << r << std::endl;
return r;
}
Result SmtEngine::query(const BoolExpr& e) {
NodeManagerScope nms(d_nodeManager);
Debug("smt") << "SMT query(" << e << ")" << std::endl;
SmtEnginePrivate::addFormula(*this, e.getNode().notNode());
Result r = check().asValidityResult();
Debug("smt") << "SMT query(" << e << ") ==> " << r << std::endl;
return r;
}
Result SmtEngine::assertFormula(const BoolExpr& e) {
NodeManagerScope nms(d_nodeManager);
Debug("smt") << "SMT assertFormula(" << e << ")" << std::endl;
SmtEnginePrivate::addFormula(*this, e.getNode());
return quickCheck().asValidityResult();
}
Expr SmtEngine::simplify(const Expr& e) {
NodeManagerScope nms(d_nodeManager);
Debug("smt") << "SMT simplify(" << e << ")" << std::endl;
Unimplemented();
}
Model SmtEngine::getModel() {
NodeManagerScope nms(d_nodeManager);
Unimplemented();
}
void SmtEngine::push() {
NodeManagerScope nms(d_nodeManager);
Debug("smt") << "SMT push()" << std::endl;
Unimplemented();
}
void SmtEngine::pop() {
NodeManagerScope nms(d_nodeManager);
Debug("smt") << "SMT pop()" << std::endl;
Unimplemented();
}
}/* CVC4 namespace */
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