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/****************************************************************************** |
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* Top contributors (to current version): |
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* Andrew Reynolds, 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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* Inference to proof conversion for datatypes. |
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*/ |
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#include "cvc5_private.h" |
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#ifndef CVC5__THEORY__DATATYPES__INFER_PROOF_CONS_H |
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#define CVC5__THEORY__DATATYPES__INFER_PROOF_CONS_H |
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#include "context/cdhashmap.h" |
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#include "expr/node.h" |
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#include "expr/proof_generator.h" |
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#include "theory/datatypes/inference.h" |
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namespace cvc5 { |
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class ProofNodeManager; |
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namespace theory { |
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namespace datatypes { |
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/** |
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* Converts between the datatype-specific (untrustworthy) DatatypesInference |
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* class and information about how to construct a trustworthy proof step |
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* (PfRule, children, args). It acts as a (lazy) proof generator where the |
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* former is registered via notifyFact and the latter is asked for in |
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* getProofFor, typically by the proof equality engine. |
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* |
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* The main (private) method of this class is convert below, which is |
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* called when we need to construct a proof node from an InferInfo. |
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*/ |
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class InferProofCons : public ProofGenerator |
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{ |
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typedef context::CDHashMap<Node, std::shared_ptr<DatatypesInference>> |
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NodeDatatypesInferenceMap; |
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public: |
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InferProofCons(context::Context* c, ProofNodeManager* pnm); |
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~InferProofCons() {} |
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/** |
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* This is called to notify that di is an inference that may need a proof |
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* in the future. |
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* |
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* In detail, this class should be prepared to respond to a call to: |
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* getProofFor(di.d_conc) |
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* in the remainder of the SAT context. This method copies di and stores it |
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* in the context-dependent map d_lazyFactMap below. |
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* |
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* This is used for lazy proof construction, where proofs are constructed |
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* only for facts that are explained. |
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*/ |
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void notifyFact(const std::shared_ptr<DatatypesInference>& di); |
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/** |
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* This returns the proof for fact. This is required for using this class as |
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* a lazy proof generator. |
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* |
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* It should be the case that a call was made to notifyFact(di) where |
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* di.d_conc is fact in this SAT context. |
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*/ |
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std::shared_ptr<ProofNode> getProofFor(Node fact) override; |
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/** Identify this generator (for debugging, etc..) */ |
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virtual std::string identify() const override; |
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private: |
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/** convert |
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* |
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* This method is called when the theory of strings makes an inference |
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* described by an InferInfo, whose fields are given by the first four |
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* arguments of this method. |
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* |
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* This method converts this call to instructions on what the proof rule |
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* step(s) are for concluding the conclusion of the inference. This |
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* information is stored in cdp. |
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*/ |
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void convert(InferenceId infer, TNode conc, TNode exp, CDProof* cdp); |
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/** A dummy context used by this class if none is provided */ |
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context::Context d_context; |
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/** the proof node manager */ |
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ProofNodeManager* d_pnm; |
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/** The lazy fact map */ |
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NodeDatatypesInferenceMap d_lazyFactMap; |
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}; |
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} // namespace datatypes |
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} // namespace theory |
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} // namespace cvc5 |
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#endif /* CVC5__THEORY__DATATYPES__INFER_PROOF_CONS_H */ |