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/****************************************************************************** |
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* Top contributors (to current version): |
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* Kshitij Bansal, Aina Niemetz, Andrew Reynolds |
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* |
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* This file is part of the cvc5 project. |
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* |
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* Copyright (c) 2009-2021 by the authors listed in the file AUTHORS |
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* in the top-level source directory and their institutional affiliations. |
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* All rights reserved. See the file COPYING in the top-level source |
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* directory for licensing information. |
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* **************************************************************************** |
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* |
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* Old implementation of the decision engine |
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*/ |
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#include "decision/decision_engine_old.h" |
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#include "decision/decision_attributes.h" |
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#include "decision/justification_heuristic.h" |
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#include "expr/node.h" |
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#include "options/decision_options.h" |
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#include "options/smt_options.h" |
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#include "util/resource_manager.h" |
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using namespace std; |
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namespace cvc5 { |
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DecisionEngineOld::DecisionEngineOld(Env& env) |
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: DecisionEngine(env), |
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d_result(context(), SAT_VALUE_UNKNOWN), |
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d_engineState(0), |
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d_enabledITEStrategy(nullptr), |
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d_decisionStopOnly(options().decision.decisionMode |
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== options::DecisionMode::STOPONLY_OLD) |
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{ |
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Trace("decision") << "Creating decision engine" << std::endl; |
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Assert(d_engineState == 0); |
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d_engineState = 1; |
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Trace("decision-init") << "DecisionEngineOld::init()" << std::endl; |
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Trace("decision-init") << " * options->decisionMode: " |
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<< options().decision.decisionMode << std::endl; |
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Trace("decision-init") << " * decisionStopOnly: " << d_decisionStopOnly |
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<< std::endl; |
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if (options().decision.decisionMode == options::DecisionMode::JUSTIFICATION) |
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{ |
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d_enabledITEStrategy.reset(new decision::JustificationHeuristic(env, this)); |
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} |
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} |
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void DecisionEngineOld::shutdown() |
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{ |
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Trace("decision") << "Shutting down decision engine" << std::endl; |
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Assert(d_engineState == 1); |
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d_engineState = 2; |
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d_enabledITEStrategy.reset(nullptr); |
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} |
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SatLiteral DecisionEngineOld::getNextInternal(bool& stopSearch) |
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{ |
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Assert(d_cnfStream != nullptr) |
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<< "Forgot to set cnfStream for decision engine?"; |
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Assert(d_satSolver != nullptr) |
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<< "Forgot to set satSolver for decision engine?"; |
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SatLiteral ret = d_enabledITEStrategy == nullptr |
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? undefSatLiteral |
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: d_enabledITEStrategy->getNext(stopSearch); |
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// if we are doing stop only, we don't return the literal |
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return d_decisionStopOnly ? undefSatLiteral : ret; |
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} |
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void DecisionEngineOld::addAssertion(TNode assertion, bool isLemma) |
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{ |
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// new assertions, reset whatever result we knew |
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d_result = SAT_VALUE_UNKNOWN; |
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if (d_enabledITEStrategy != nullptr) |
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{ |
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d_enabledITEStrategy->addAssertion(assertion); |
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} |
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} |
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void DecisionEngineOld::addSkolemDefinition(TNode lem, |
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TNode skolem, |
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bool isLemma) |
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{ |
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// new assertions, reset whatever result we knew |
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d_result = SAT_VALUE_UNKNOWN; |
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if (d_enabledITEStrategy != nullptr) |
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{ |
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d_enabledITEStrategy->addSkolemDefinition(lem, skolem); |
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} |
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} |
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} // namespace cvc5 |