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/****************************************************************************** |
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* Top contributors (to current version): |
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* Mathias Preiner |
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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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* Bitblast proof generator for generating bit-blast proof steps. |
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*/ |
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#include "cvc5_private.h" |
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#ifndef CVC5__THEORY__BV__BITBLAST__BITBLAST_PROOF_GENERATOR_H |
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#define CVC5__THEORY__BV__BITBLAST__BITBLAST_PROOF_GENERATOR_H |
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#include "proof/proof_generator.h" |
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#include "proof/proof_node_manager.h" |
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#include "smt/env_obj.h" |
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namespace cvc5 { |
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class TConvProofGenerator; |
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namespace theory { |
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namespace bv { |
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/** Proof generator fot bit-blast proofs. */ |
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class BitblastProofGenerator : public ProofGenerator, protected EnvObj |
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{ |
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public: |
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BitblastProofGenerator(Env& env, |
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ProofNodeManager* pnm, |
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TConvProofGenerator* tcpg); |
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~BitblastProofGenerator(){}; |
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/** |
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* Get proof for, which expects an equality of the form t = bb(t). |
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* This returns a proof based on the term conversion proof generator utility. |
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*/ |
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std::shared_ptr<ProofNode> getProofFor(Node eq) override; |
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std::string identify() const override { return "BitblastStepProofGenerator"; } |
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/** |
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* Record bit-blast step for bit-vector atom t. |
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* |
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* @param t Bit-vector atom |
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* @param bbt The bit-blasted term obtained from bit-blasting t without |
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* applying any rewriting. |
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* @param eq The equality that needs to be justified, |
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* i.e.,t = rewrite(bb(rewrite(t))) |
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*/ |
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void addBitblastStep(TNode t, TNode bbt, TNode eq); |
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private: |
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/** The associated proof node manager. */ |
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ProofNodeManager* d_pnm; |
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/** |
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* The associated term conversion proof generator, which tracks the |
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* individual bit-blast steps. |
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*/ |
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TConvProofGenerator* d_tcpg; |
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/** |
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* Cache that maps equalities to information required to reconstruct the |
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* proof for given equality. |
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*/ |
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std::unordered_map<Node, std::tuple<Node, Node>> d_cache; |
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}; |
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} // namespace bv |
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} // namespace theory |
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} // namespace cvc5 |
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#endif |