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       1                 :            : /******************************************************************************
       2                 :            :  * Top contributors (to current version):
       3                 :            :  *   Andrew Reynolds, Aina Niemetz
       4                 :            :  *
       5                 :            :  * This file is part of the cvc5 project.
       6                 :            :  *
       7                 :            :  * Copyright (c) 2009-2024 by the authors listed in the file AUTHORS
       8                 :            :  * in the top-level source directory and their institutional affiliations.
       9                 :            :  * All rights reserved.  See the file COPYING in the top-level source
      10                 :            :  * directory for licensing information.
      11                 :            :  * ****************************************************************************
      12                 :            :  *
      13                 :            :  * Shared solver in the distributed architecture.
      14                 :            :  */
      15                 :            : 
      16                 :            : #include "theory/shared_solver_distributed.h"
      17                 :            : 
      18                 :            : #include "theory/theory_engine.h"
      19                 :            : 
      20                 :            : namespace cvc5::internal {
      21                 :            : namespace theory {
      22                 :            : 
      23                 :      47593 : SharedSolverDistributed::SharedSolverDistributed(Env& env, TheoryEngine& te)
      24                 :      47593 :     : SharedSolver(env, te)
      25                 :            : {
      26                 :      47593 : }
      27                 :            : 
      28                 :      47593 : bool SharedSolverDistributed::needsEqualityEngine(theory::EeSetupInfo& esi)
      29                 :            : {
      30                 :      47593 :   return d_sharedTerms.needsEqualityEngine(esi);
      31                 :            : }
      32                 :            : 
      33                 :      47593 : void SharedSolverDistributed::setEqualityEngine(eq::EqualityEngine* ee)
      34                 :            : {
      35                 :      47593 :   d_sharedTerms.setEqualityEngine(ee);
      36                 :      47593 : }
      37                 :            : 
      38                 :    1621360 : void SharedSolverDistributed::preRegisterSharedInternal(TNode t)
      39                 :            : {
      40         [ +  + ]:    1621360 :   if (t.getKind() == Kind::EQUAL)
      41                 :            :   {
      42                 :            :     // When sharing is enabled, we propagate from the shared terms manager also
      43                 :     792035 :     d_sharedTerms.addEqualityToPropagate(t);
      44                 :            :   }
      45                 :    1621360 : }
      46                 :            : 
      47                 :    1848580 : EqualityStatus SharedSolverDistributed::getEqualityStatus(TNode a, TNode b)
      48                 :            : {
      49                 :            :   // if we're using a shared terms database, ask its status if a and b are
      50                 :            :   // shared.
      51                 :    1848580 :   if (d_sharedTerms.isShared(a) && d_sharedTerms.isShared(b))
      52                 :            :   {
      53         [ +  + ]:    1827100 :     if (d_sharedTerms.areEqual(a, b))
      54                 :            :     {
      55                 :      39025 :       return EQUALITY_TRUE_AND_PROPAGATED;
      56                 :            :     }
      57         [ +  + ]:    1788070 :     else if (d_sharedTerms.areDisequal(a, b))
      58                 :            :     {
      59                 :       5437 :       return EQUALITY_FALSE_AND_PROPAGATED;
      60                 :            :     }
      61                 :            :   }
      62                 :            :   // otherwise, ask the theory, which may depend on the uninterpreted sort owner
      63                 :            :   TheoryId tid =
      64                 :    1804110 :       Theory::theoryOf(a.getType(), d_env.getUninterpretedSortOwner());
      65                 :    1804110 :   return d_te.theoryOf(tid)->getEqualityStatus(a, b);
      66                 :            : }
      67                 :            : 
      68                 :     453898 : TrustNode SharedSolverDistributed::explain(TNode literal, TheoryId id)
      69                 :            : {
      70                 :     453898 :   TrustNode texp;
      71         [ +  + ]:     453898 :   if (id == THEORY_BUILTIN)
      72                 :            :   {
      73                 :            :     // explanation using the shared terms database
      74                 :     150778 :     texp = d_sharedTerms.explain(literal);
      75         [ +  - ]:     301556 :     Trace("shared-solver")
      76                 :          0 :         << "\tTerm was propagated by THEORY_BUILTIN. Explanation: "
      77 [ -  + ][ -  - ]:     150778 :         << texp.getNode() << std::endl;
      78                 :            :   }
      79                 :            :   else
      80                 :            :   {
      81                 :            :     // By default, we ask the individual theory for the explanation.
      82                 :            :     // It is possible that a centralized approach could preempt this.
      83                 :     303120 :     texp = d_te.theoryOf(id)->explain(literal);
      84         [ +  - ]:     606240 :     Trace("shared-solver") << "\tTerm was propagated by owner theory: " << id
      85 [ -  + ][ -  - ]:     303120 :                            << ". Explanation: " << texp.getNode() << std::endl;
      86                 :            :   }
      87                 :     453898 :   return texp;
      88                 :            : }
      89                 :            : 
      90                 :    9866030 : void SharedSolverDistributed::assertShared(TNode n, bool polarity, TNode reason)
      91                 :            : {
      92                 :    9866030 :   d_sharedTerms.assertShared(n, polarity, reason);
      93                 :    9866030 : }
      94                 :            : 
      95                 :            : }  // namespace theory
      96                 :            : }  // namespace cvc5::internal