From 8ad308b23c705e73507a42d2425289e999d47f86 Mon Sep 17 00:00:00 2001 From: Haniel Barbosa Date: Tue, 1 Sep 2020 19:08:23 -0300 Subject: Removes old proof code (#4964) This deletes much of the old proof code. Basically everything but the minimal necessary infra-structure for producing unsat cores. That includes dependency tracking in preprocessing, the prop engine proof and the unsat core computation code in the old proof manager. These should also go once we fully integrate into master the new proof infrastructure. It also cleans interfaces that were using old-proof-code-specific constructs (such as LemmaProofRecipe). When possible or when it made sense standalone local proof production code was kept, but deactivated (such is in the equality engine and in the arithmetic solver). --- src/proof/theory_proof.h | 510 ----------------------------------------------- 1 file changed, 510 deletions(-) delete mode 100644 src/proof/theory_proof.h (limited to 'src/proof/theory_proof.h') diff --git a/src/proof/theory_proof.h b/src/proof/theory_proof.h deleted file mode 100644 index dd5fe0326..000000000 --- a/src/proof/theory_proof.h +++ /dev/null @@ -1,510 +0,0 @@ -/********************* */ -/*! \file theory_proof.h - ** \verbatim - ** Top contributors (to current version): - ** Liana Hadarean, Guy Katz, Alex Ozdemir - ** This file is part of the CVC4 project. - ** Copyright (c) 2009-2020 by the authors listed in the file AUTHORS - ** in the top-level source directory) and their institutional affiliations. - ** All rights reserved. See the file COPYING in the top-level source - ** directory for licensing information.\endverbatim - ** - ** [[ Add lengthier description here ]] - - ** \todo document this file - -**/ - -#include "cvc4_private.h" - -#ifndef CVC4__THEORY_PROOF_H -#define CVC4__THEORY_PROOF_H - -#include -#include -#include - -#include "expr/expr.h" -#include "expr/type_node.h" -#include "proof/clause_id.h" -#include "proof/proof_utils.h" -#include "prop/sat_solver_types.h" -#include "theory/uf/equality_engine.h" -#include "util/proof.h" -namespace CVC4 { - -namespace theory { -class Theory; -} /* namespace CVC4::theory */ - -typedef std::unordered_map < ClauseId, prop::SatClause* > IdToSatClause; - -class TheoryProof; - -typedef std::unordered_set ExprSet; -typedef std::map TheoryProofTable; - -typedef std::set TheoryIdSet; -typedef std::map ExprToTheoryIds; - -class TheoryProofEngine { -protected: - ExprSet d_registrationCache; - TheoryProofTable d_theoryProofTable; - ExprToTheoryIds d_exprToTheoryIds; - - /** - * Returns whether the theory is currently supported in proof - * production mode. - */ - bool supportedTheory(theory::TheoryId id); -public: - - TheoryProofEngine(); - virtual ~TheoryProofEngine(); - - /** - * Print the theory term (could be an atom) by delegating to the proper theory. - * - * @param term - * @param os - */ - virtual void printLetTerm(Expr term, std::ostream& os) = 0; - - /** - * Print a term in some (core or non-core) theory - * - * @param term expression representing term - * @param os output stream - * @param expectedType The type that this is expected to have in a parent - * node. Null if there are no such requirements. This is useful for requesting - * type conversions from the theory. e.g. in (5.5 == 4) the right-hand-side - * should be converted to a real. - * - * The first version of this function has a default value for expectedType - * (null) The second version is virtual. - * - * They are split to avoid mixing virtual function and default argument - * values, which behave weirdly when combined. - */ - void printBoundTerm(Expr term, - std::ostream& os, - const ProofLetMap& map, - TypeNode expectedType = TypeNode()) - { - this->printBoundTermAsType(term, os, map, expectedType); - } - virtual void printBoundTermAsType(Expr term, - std::ostream& os, - const ProofLetMap& map, - TypeNode expectedType) = 0; - - /** - * Print the proof representation of the given sort. - * - * @param os - */ - virtual void printSort(Type type, std::ostream& os) = 0; - - /** - * Go over the assertions and register all terms with the theories. - * - * @param os - * @param paren closing parenthesis - */ - virtual void registerTermsFromAssertions() = 0; - - /** - * Print the theory assertions (arbitrary formulas over - * theory atoms) - * - * @param os - * @param paren closing parenthesis - */ - virtual void printAssertions(std::ostream& os, std::ostream& paren) = 0; - /** - * Print variable declarations that need to appear within the proof, - * e.g. skolemized variables. - * - * @param os - * @param paren closing parenthesis - */ - virtual void printDeferredDeclarations(std::ostream& os, std::ostream& paren) = 0; - - /** - * Print aliasing declarations. - * - * @param os - * @param paren closing parenthesis - */ - virtual void printAliasingDeclarations(std::ostream& os, std::ostream& paren, const ProofLetMap &globalLetMap) = 0; - - /** - * Print proofs of all the theory lemmas (must prove - * actual clause used in resolution proof). - * - * @param os - * @param paren - */ - virtual void printTheoryLemmas(const IdToSatClause& lemmas, std::ostream& os, - std::ostream& paren, ProofLetMap& map) = 0; - - /** - * Register theory atom (ensures all terms and atoms are declared). - * - * @param atom - */ - void registerTerm(Expr atom); - - /** - * Ensures that a theory proof class for the given theory is created. - * This method can be invoked regardless of whether the "proof" option - * has been set. - * - * @param theory - */ - void registerTheory(theory::Theory* theory); - /** - * Additional configuration of the theory proof class for the given theory. - * This method should only be invoked when the "proof" option has been set. - * - * @param theory - */ - void finishRegisterTheory(theory::Theory* theory); - - theory::TheoryId getTheoryForLemma(const prop::SatClause* clause); - TheoryProof* getTheoryProof(theory::TheoryId id); - - void markTermForFutureRegistration(Expr term, theory::TheoryId id); - - void printConstantDisequalityProof(std::ostream& os, Expr c1, Expr c2, const ProofLetMap &globalLetMap); - - /** - * Print a term in some non-core theory - * - * @param term expression representing term - * @param os output stream - * @param expectedType The type that this is expected to have in a parent - * node. Null if there are no such requirements. This is useful for requesting - * type conversions from the theory. e.g. in (5.5 == 4) the right-hand-side - * should be converted to a real. - * - * The first version of this function has a default value for expectedType - * (null) The second version is virtual. - * - * They are split to avoid mixing virtual function and default argument - * values, which behave weirdly when combined. - */ - void printTheoryTerm(Expr term, - std::ostream& os, - const ProofLetMap& map, - TypeNode expectedType = TypeNode()); - virtual void printTheoryTermAsType(Expr term, - std::ostream& os, - const ProofLetMap& map, - TypeNode expectedType) = 0; - /** - * Calls `TheoryProof::equalityType` on the appropriate theory. - */ - TypeNode equalityType(const Expr& left, const Expr& right); - - bool printsAsBool(const Node &n); -}; - -class LFSCTheoryProofEngine : public TheoryProofEngine { - void bind(Expr term, ProofLetMap& map, Bindings& let_order); -public: - LFSCTheoryProofEngine() - : TheoryProofEngine() {} - - void printTheoryTermAsType(Expr term, - std::ostream& os, - const ProofLetMap& map, - TypeNode expectedType) override; - - void registerTermsFromAssertions() override; - void printSortDeclarations(std::ostream& os, std::ostream& paren); - void printTermDeclarations(std::ostream& os, std::ostream& paren); - void printCoreTerm(Expr term, - std::ostream& os, - const ProofLetMap& map, - TypeNode expectedType = TypeNode()); - void printLetTerm(Expr term, std::ostream& os) override; - void printBoundTermAsType(Expr term, - std::ostream& os, - const ProofLetMap& map, - TypeNode expectedType) override; - void printAssertions(std::ostream& os, std::ostream& paren) override; - void printLemmaRewrites(NodePairSet& rewrites, - std::ostream& os, - std::ostream& paren); - void printDeferredDeclarations(std::ostream& os, - std::ostream& paren) override; - void printAliasingDeclarations(std::ostream& os, - std::ostream& paren, - const ProofLetMap& globalLetMap) override; - void printTheoryLemmas(const IdToSatClause& lemmas, - std::ostream& os, - std::ostream& paren, - ProofLetMap& map) override; - void printSort(Type type, std::ostream& os) override; - - void performExtraRegistrations(); - - void finalizeBvConflicts(const IdToSatClause& lemmas, std::ostream& os); - -private: - static void dumpTheoryLemmas(const IdToSatClause& lemmas); - - // Prints this boolean term as a formula. - // If necessary, it prints a wrapper converting a `Bool`-sorted term to a - // formula. - void printBoundFormula(Expr term, std::ostream& os, const ProofLetMap& map); - - // TODO: this function should be moved into the BV prover. - - std::map d_assertionToRewrite; -}; - -class TheoryProof { -protected: - // Pointer to the theory for this proof - theory::Theory* d_theory; - TheoryProofEngine* d_proofEngine; - virtual theory::TheoryId getTheoryId() = 0; - - public: - TheoryProof(theory::Theory* th, TheoryProofEngine* proofEngine) - : d_theory(th) - , d_proofEngine(proofEngine) - {} - virtual ~TheoryProof() {}; - /** - * Print a term belonging some theory, not necessarily this one. - * - * @param term expresion representing term - * @param os output stream - */ - void printTerm(Expr term, std::ostream& os, const ProofLetMap& map) { - d_proofEngine->printBoundTerm(term, os, map); - } - /** - * Print a term belonging to THIS theory. - * - * @param term expression representing term - * @param os output stream - * @param expectedType The type that this is expected to have in a parent - * node. Null if there are no such requirements. This is useful for requesting - * type conversions from the theory. e.g. in (5.5 == 4) the right-hand-side - * should be converted to a real. - * - * The first version of this function has a default value for expectedType - * (null) The second version is virtual. - * - * They are split to avoid mixing virtual function and default argument - * values, which behave weirdly when combined. - */ - void printOwnedTerm(Expr term, - std::ostream& os, - const ProofLetMap& map, - TypeNode expectedType = TypeNode()); - - virtual void printOwnedTermAsType(Expr term, - std::ostream& os, - const ProofLetMap& map, - TypeNode expectedType) = 0; - - /** - * Return the type (at the SMT level, the sort) of an equality or disequality - * between `left` and `right`. - * - * The default implementation asserts that the two have the same type, and - * returns it. - * - * A theory may want to do something else. - * - * For example, the theory of arithmetic allows equalities between Reals and - * Integers. In this case the integer is upcast to a real, and the equality - * is over reals. - */ - virtual TypeNode equalityType(const Expr& left, const Expr& right); - - /** - * Print the proof representation of the given type that belongs to some theory. - * - * @param type - * @param os - */ - void printSort(Type type, std::ostream& os) { - d_proofEngine->printSort(type, os); - } - - // congrence matching term helper - bool match(TNode n1, TNode n2); - - /** - * Helper function for ProofUF::toStreamRecLFSC and - * ProofArray::toStreamRecLFSC - * Inputs: - * - pf: equality engine proof - * - map: A map for the let-expressions in the proof - * - subTrans: main transitivity proof part - * - pPrettyPrinter: optional pretty printer for sub-proofs - * returns: - * - the index of the contradicting node in pf. - * */ - int assertAndPrint( - const theory::eq::EqProof& pf, - const ProofLetMap& map, - std::shared_ptr subTrans, - theory::eq::EqProof::PrettyPrinter* pPrettyPrinter = nullptr); - - /** - * Helper function for ProofUF::toStreamRecLFSC and - * ProofArray::toStreamRecLFSC - * Inputs: - * - evenLengthSequence: true iff the length of the sequence - * of the identical equalities is even. - * - sequenceOver: have we reached the last equality of this sequence? - * - pf: equality engine proof - * - map: A map for the let-expressions in the proof - * - subproofStr: current stringstream content - * - outStream: output stream to which the proof is printed - * - n: transitivity sub-proof - * - nodeAfterEqualitySequence: The node after the identical sequence. - * Returns: - * A pair of nodes, that are the updated nodes n and nodeAfterEqualitySequence - * - */ - std::pair identicalEqualitiesPrinterHelper( - bool evenLengthSequence, - bool sequenceOver, - const theory::eq::EqProof& pf, - const ProofLetMap& map, - const std::string subproofStr, - std::stringstream* outStream, - Node n, - Node nodeAfterEqualitySequence); - - /** - * Print the proof representation of the given type that belongs to THIS theory. - * - * @param type - * @param os - */ - virtual void printOwnedSort(Type type, std::ostream& os) = 0; - /** - * Print a proof for the theory lemmas. Must prove - * clause representing lemmas to be used in resolution proof. - * - * @param os output stream - */ - virtual void printTheoryLemmaProof(std::vector& lemma, - std::ostream& os, - std::ostream& paren, - const ProofLetMap& map); - /** - * Print the sorts declarations for this theory. - * - * @param os - * @param paren - */ - virtual void printSortDeclarations(std::ostream& os, std::ostream& paren) = 0; - /** - * Print the term declarations for this theory. - * - * @param os - * @param paren - */ - virtual void printTermDeclarations(std::ostream& os, std::ostream& paren) = 0; - /** - * Print any deferred variable/sorts declarations for this theory - * (those that need to appear inside the actual proof). - * - * @param os - * @param paren - */ - virtual void printDeferredDeclarations(std::ostream& os, std::ostream& paren) = 0; - /** - * Print any aliasing declarations. - * - * @param os - * @param paren - */ - virtual void printAliasingDeclarations(std::ostream& os, std::ostream& paren, const ProofLetMap &globalLetMap) = 0; - /** - * Register a term of this theory that appears in the proof. - * - * @param term - */ - virtual void registerTerm(Expr term) = 0; - /** - * Print a proof for the disequality of two constants that belong to this theory. - * - * @param term - */ - virtual void printConstantDisequalityProof(std::ostream& os, Expr c1, Expr c2, const ProofLetMap &globalLetMap); - /** - * Print a proof for the equivalence of n1 and n2. - * - * @param term - */ - virtual void printRewriteProof(std::ostream& os, const Node &n1, const Node &n2); - - /** - * Return whether this node, when serialized as an LFSC proof, has sort `Bool`. - * - * This is virtual because it ultimately, theories control the serialization - * of their proofs, so a theory will need to override this appropriately. - * - * This should only be called on nodes of type `Bool`. - */ - virtual bool printsAsBool(const Node &n) { - // Most nodes print as formulas, so this is the default. - return false; - } -}; - -class BooleanProof : public TheoryProof { -protected: - ExprSet d_declarations; // all the boolean variables - theory::TheoryId getTheoryId() override; - - public: - BooleanProof(TheoryProofEngine* proofEngine); - - void registerTerm(Expr term) override; -}; - -class LFSCBooleanProof : public BooleanProof { -public: - LFSCBooleanProof(TheoryProofEngine* proofEngine) - : BooleanProof(proofEngine) - {} - void printOwnedTermAsType(Expr term, - std::ostream& os, - const ProofLetMap& map, - TypeNode ty) override; - void printOwnedSort(Type type, std::ostream& os) override; - void printTheoryLemmaProof(std::vector& lemma, - std::ostream& os, - std::ostream& paren, - const ProofLetMap& map) override; - void printSortDeclarations(std::ostream& os, std::ostream& paren) override; - void printTermDeclarations(std::ostream& os, std::ostream& paren) override; - void printDeferredDeclarations(std::ostream& os, - std::ostream& paren) override; - void printAliasingDeclarations(std::ostream& os, - std::ostream& paren, - const ProofLetMap& globalLetMap) override; - - bool printsAsBool(const Node& n) override; - void printConstantDisequalityProof(std::ostream& os, - Expr c1, - Expr c2, - const ProofLetMap& globalLetMap) override; -}; - -} /* CVC4 namespace */ - -#endif /* CVC4__THEORY_PROOF_H */ -- cgit v1.2.3