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/****************************************************************************** |
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* Top contributors (to current version): |
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* Andrew Reynolds, Mudathir Mohamed, Gereon Kremer |
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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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* Implementation of inference information utility. |
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*/ |
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#include "theory/strings/infer_info.h" |
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#include "theory/strings/inference_manager.h" |
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#include "theory/strings/theory_strings_utils.h" |
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namespace cvc5 { |
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namespace theory { |
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namespace strings { |
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InferInfo::InferInfo(InferenceId id): TheoryInference(id), d_sim(nullptr), d_idRev(false) |
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{ |
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} |
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TrustNode InferInfo::processLemma(LemmaProperty& p) |
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{ |
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return d_sim->processLemma(*this, p); |
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} |
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Node InferInfo::processFact(std::vector<Node>& exp, ProofGenerator*& pg) |
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{ |
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for (const Node& ec : d_premises) |
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{ |
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utils::flattenOp(kind::AND, ec, exp); |
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} |
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d_sim->processFact(*this, pg); |
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return d_conc; |
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} |
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bool InferInfo::isTrivial() const |
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{ |
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Assert(!d_conc.isNull()); |
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return d_conc.isConst() && d_conc.getConst<bool>(); |
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} |
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bool InferInfo::isConflict() const |
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{ |
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Assert(!d_conc.isNull()); |
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return d_conc.isConst() && !d_conc.getConst<bool>() && d_noExplain.empty(); |
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} |
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bool InferInfo::isFact() const |
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{ |
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Assert(!d_conc.isNull()); |
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TNode atom = d_conc.getKind() == kind::NOT ? d_conc[0] : d_conc; |
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// we could process inferences with conjunctive conclusions as facts, where |
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// the explanation is copied. However, for simplicity, we always send these |
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// as lemmas. This case happens very infrequently. |
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return !atom.isConst() && atom.getKind() != kind::OR |
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&& atom.getKind() != kind::AND && d_noExplain.empty(); |
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} |
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Node InferInfo::getPremises() const |
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{ |
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// d_noExplain is a subset of d_ant |
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return utils::mkAnd(d_premises); |
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} |
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std::ostream& operator<<(std::ostream& out, const InferInfo& ii) |
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{ |
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out << "(infer " << ii.getId() << " " << ii.d_conc; |
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if (ii.d_idRev) |
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{ |
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out << " :rev"; |
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} |
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if (!ii.d_premises.empty()) |
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{ |
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out << " :ant (" << ii.d_premises << ")"; |
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} |
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if (!ii.d_noExplain.empty()) |
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{ |
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out << " :no-explain (" << ii.d_noExplain << ")"; |
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} |
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out << ")"; |
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return out; |
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} |
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} // namespace strings |
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} // namespace theory |
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} // namespace cvc5 |