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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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* Bitblaster for simple BV solver. |
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*/ |
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#include "cvc5_private.h" |
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#ifndef CVC5__THEORY__BV__BITBLAST_SIMPLE_BITBLASTER_H |
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#define CVC5__THEORY__BV__BITBLAST_SIMPLE_BITBLASTER_H |
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#include "theory/bv/bitblast/bitblaster.h" |
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namespace cvc5 { |
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namespace theory { |
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namespace bv { |
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/** |
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* Implementation of a simple Node-based bit-blaster. |
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* |
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* Implements the bare minimum to bit-blast bit-vector atoms/terms. |
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*/ |
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class BBSimple : public TBitblaster<Node> |
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{ |
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using Bits = std::vector<Node>; |
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public: |
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BBSimple(TheoryState* state); |
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~BBSimple() = default; |
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/** Bit-blast term 'node' and return bit-blasted 'bits'. */ |
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void bbTerm(TNode node, Bits& bits) override; |
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/** Bit-blast atom 'node'. */ |
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void bbAtom(TNode node) override; |
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/** Get bit-blasted atom, returns 'atom' itself since it's Boolean. */ |
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Node getBBAtom(TNode atom) const override; |
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/** Store Boolean node representing the bit-blasted atom. */ |
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void storeBBAtom(TNode atom, Node atom_bb) override; |
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/** Store bits of bit-blasted term. */ |
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void storeBBTerm(TNode node, const Bits& bits) override; |
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/** Check if atom was already bit-blasted. */ |
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bool hasBBAtom(TNode atom) const override; |
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/** Get bit-blasted node stored for atom. */ |
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Node getStoredBBAtom(TNode node); |
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/** Create 'bits' for variable 'var'. */ |
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void makeVariable(TNode var, Bits& bits) override; |
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/** Collect model values for all relevant terms given in 'relevantTerms'. */ |
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bool collectModelValues(TheoryModel* m, const std::set<Node>& relevantTerms); |
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prop::SatSolver* getSatSolver() override { Unreachable(); } |
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/** Checks whether node is a variable introduced via `makeVariable`.*/ |
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bool isVariable(TNode node); |
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private: |
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/** Query SAT solver for assignment of node 'a'. */ |
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Node getModelFromSatSolver(TNode a, bool fullModel) override; |
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/** Caches variables for which we already created bits. */ |
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TNodeSet d_variables; |
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/** Stores bit-blasted atoms. */ |
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std::unordered_map<Node, Node> d_bbAtoms; |
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/** Theory state. */ |
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TheoryState* d_state; |
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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 |