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/****************************************************************************** |
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* Top contributors (to current version): |
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* Andrew Reynolds, Mathias Preiner, Morgan Deters |
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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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* The quantifiers module for managing all approaches to synthesis, |
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* in particular, those described in Reynolds et al CAV 2015. |
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*/ |
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#include "cvc5_private.h" |
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#ifndef CVC5__THEORY__QUANTIFIERS__SYNTH_ENGINE_H |
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#define CVC5__THEORY__QUANTIFIERS__SYNTH_ENGINE_H |
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#include "context/cdhashmap.h" |
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#include "theory/quantifiers/quant_module.h" |
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#include "theory/quantifiers/sygus/sygus_qe_preproc.h" |
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#include "theory/quantifiers/sygus/sygus_stats.h" |
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#include "theory/quantifiers/sygus/synth_conjecture.h" |
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namespace cvc5 { |
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namespace theory { |
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namespace quantifiers { |
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class SynthEngine : public QuantifiersModule |
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{ |
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typedef context::CDHashMap<Node, bool> NodeBoolMap; |
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public: |
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SynthEngine(Env& env, |
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QuantifiersState& qs, |
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QuantifiersInferenceManager& qim, |
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QuantifiersRegistry& qr, |
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TermRegistry& tr); |
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~SynthEngine(); |
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/** presolve |
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* |
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* Called at the beginning of each call to solve a synthesis problem, which |
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* may be e.g. a check-synth or get-abduct call. |
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*/ |
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void presolve() override; |
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/** needs check, return true if e is last call */ |
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bool needsCheck(Theory::Effort e) override; |
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/** always needs model at effort QEFFORT_MODEL */ |
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QEffort needsModel(Theory::Effort e) override; |
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/* Call during quantifier engine's check */ |
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void check(Theory::Effort e, QEffort quant_e) override; |
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/** check ownership */ |
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void checkOwnership(Node q) override; |
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/* Called for new quantifiers */ |
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void registerQuantifier(Node q) override; |
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/** Identify this module (for debugging, dynamic configuration, etc..) */ |
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std::string identify() const override { return "SynthEngine"; } |
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/** get synth solutions |
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* |
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* This function adds entries to sol_map that map functions-to-synthesize |
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* with their solutions, for all active conjectures (currently just the one |
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* assigned to d_conj). This should be called immediately after the solver |
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* answers unsat for sygus input. |
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* |
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* For details on what is added to sol_map, see |
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* SynthConjecture::getSynthSolutions. |
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*/ |
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bool getSynthSolutions(std::map<Node, std::map<Node, Node> >& sol_map); |
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/** preregister assertion (before rewrite) |
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* |
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* The purpose of this method is to inform the solution reconstruction |
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* techniques within the single invocation module that n is an original |
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* assertion. This is used as a heuristic to remember terms that are likely |
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* to help when trying to reconstruct a solution that fits a given input |
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* syntax. |
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*/ |
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void preregisterAssertion(Node n); |
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private: |
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/** the conjecture formula(s) we are waiting to assign */ |
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std::vector<Node> d_waiting_conj; |
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/** The synthesis conjectures that this class is managing. */ |
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std::vector<std::unique_ptr<SynthConjecture> > d_conjs; |
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/** |
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* The first conjecture in the above vector. We track this conjecture |
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* so that a synthesis conjecture can be preregistered during a call to |
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* preregisterAssertion. |
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*/ |
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SynthConjecture* d_conj; |
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/** |
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* The quantifier elimination preprocess module. |
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*/ |
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SygusQePreproc d_sqp; |
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/** The statistics */ |
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SygusStatistics d_statistics; |
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/** assign quantified formula q as a conjecture |
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* |
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* This method either assigns q to a synthesis conjecture object in d_conjs, |
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* or otherwise reduces q to an equivalent form. This method does the latter |
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* if this class determines that it would rather rewrite q to an equivalent |
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* form r (in which case this method returns the lemma q <=> r). An example of |
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* this is the quantifier elimination step option::sygusQePreproc(). |
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*/ |
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void assignConjecture(Node q); |
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/** check conjecture |
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* |
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* This method returns true if the conjecture is finished processing solutions |
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* for this call to SynthEngine::check(). |
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*/ |
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bool checkConjecture(SynthConjecture* conj); |
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}; /* class SynthEngine */ |
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} // namespace quantifiers |
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} // namespace theory |
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} // namespace cvc5 |
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#endif |