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/****************************************************************************** |
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* Top contributors (to current version): |
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* Andrew Reynolds |
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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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* Shared solver in the distributed architecture. |
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*/ |
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#include "theory/shared_solver_distributed.h" |
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#include "theory/theory_engine.h" |
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namespace cvc5 { |
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namespace theory { |
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SharedSolverDistributed::SharedSolverDistributed(Env& env, TheoryEngine& te) |
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: SharedSolver(env, te) |
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{ |
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} |
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bool SharedSolverDistributed::needsEqualityEngine(theory::EeSetupInfo& esi) |
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{ |
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return d_sharedTerms.needsEqualityEngine(esi); |
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} |
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void SharedSolverDistributed::setEqualityEngine(eq::EqualityEngine* ee) |
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{ |
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d_sharedTerms.setEqualityEngine(ee); |
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} |
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void SharedSolverDistributed::preRegisterSharedInternal(TNode t) |
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{ |
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if (t.getKind() == kind::EQUAL) |
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{ |
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// When sharing is enabled, we propagate from the shared terms manager also |
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d_sharedTerms.addEqualityToPropagate(t); |
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} |
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} |
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EqualityStatus SharedSolverDistributed::getEqualityStatus(TNode a, TNode b) |
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{ |
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// if we're using a shared terms database, ask its status if a and b are |
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// shared. |
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if (d_sharedTerms.isShared(a) && d_sharedTerms.isShared(b)) |
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{ |
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if (d_sharedTerms.areEqual(a, b)) |
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{ |
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return EQUALITY_TRUE_AND_PROPAGATED; |
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} |
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else if (d_sharedTerms.areDisequal(a, b)) |
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{ |
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return EQUALITY_FALSE_AND_PROPAGATED; |
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} |
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} |
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// otherwise, ask the theory |
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return d_te.theoryOf(Theory::theoryOf(a.getType()))->getEqualityStatus(a, b); |
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} |
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TrustNode SharedSolverDistributed::explain(TNode literal, TheoryId id) |
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{ |
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TrustNode texp; |
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if (id == THEORY_BUILTIN) |
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{ |
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// explanation using the shared terms database |
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texp = d_sharedTerms.explain(literal); |
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Trace("shared-solver") |
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<< "\tTerm was propagated by THEORY_BUILTIN. Explanation: " |
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<< texp.getNode() << std::endl; |
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} |
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else |
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{ |
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// By default, we ask the individual theory for the explanation. |
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// It is possible that a centralized approach could preempt this. |
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texp = d_te.theoryOf(id)->explain(literal); |
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Trace("shared-solver") << "\tTerm was propagated by owner theory: " << id |
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<< ". Explanation: " << texp.getNode() << std::endl; |
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} |
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return texp; |
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} |
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void SharedSolverDistributed::assertShared(TNode n, bool polarity, TNode reason) |
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{ |
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d_sharedTerms.assertShared(n, polarity, reason); |
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} |
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} // namespace theory |
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} // namespace cvc5 |