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       1                 :            : /******************************************************************************
       2                 :            :  * This file is part of the cvc5 project.
       3                 :            :  *
       4                 :            :  * Copyright (c) 2009-2026 by the authors listed in the file AUTHORS
       5                 :            :  * in the top-level source directory and their institutional affiliations.
       6                 :            :  * All rights reserved.  See the file COPYING in the top-level source
       7                 :            :  * directory for licensing information.
       8                 :            :  * ****************************************************************************
       9                 :            :  *
      10                 :            :  * Management of a distributed approach for equality sharing.
      11                 :            :  */
      12                 :            : 
      13                 :            : #include "theory/ee_manager_distributed.h"
      14                 :            : 
      15                 :            : #include "theory/quantifiers_engine.h"
      16                 :            : #include "theory/shared_solver.h"
      17                 :            : #include "theory/theory_engine.h"
      18                 :            : #include "theory/uf/equality_engine.h"
      19                 :            : 
      20                 :            : namespace cvc5::internal {
      21                 :            : namespace theory {
      22                 :            : 
      23                 :      49892 : EqEngineManagerDistributed::EqEngineManagerDistributed(Env& env,
      24                 :            :                                                        TheoryEngine& te,
      25                 :      49892 :                                                        SharedSolver& shs)
      26                 :      49892 :     : EqEngineManager(env, te, shs), d_masterEENotify(nullptr)
      27                 :            : {
      28                 :      49892 : }
      29                 :            : 
      30                 :      99094 : EqEngineManagerDistributed::~EqEngineManagerDistributed()
      31                 :            : {
      32                 :      99094 : }
      33                 :            : 
      34                 :      49892 : void EqEngineManagerDistributed::initializeTheories()
      35                 :            : {
      36                 :      49892 :   context::Context* c = context();
      37                 :            :   // initialize the shared solver
      38                 :      49892 :   EeSetupInfo esis;
      39         [ +  - ]:      49892 :   if (d_sharedSolver.needsEqualityEngine(esis))
      40                 :            :   {
      41                 :            :     // allocate an equality engine for the shared terms database
      42                 :      49892 :     d_stbEqualityEngine.reset(allocateEqualityEngine(esis, c));
      43                 :      49892 :     d_sharedSolver.setEqualityEngine(d_stbEqualityEngine.get());
      44                 :            :   }
      45                 :            :   else
      46                 :            :   {
      47                 :          0 :     Unhandled() << "Expected shared solver to use equality engine";
      48                 :            :   }
      49                 :            : 
      50                 :      49892 :   const LogicInfo& logicInfo = d_env.getLogicInfo();
      51         [ +  + ]:      49892 :   if (logicInfo.isQuantified())
      52                 :            :   {
      53                 :            :     // construct the master equality engine
      54 [ -  + ][ -  + ]:      43161 :     Assert(d_masterEqualityEngine == nullptr);
                 [ -  - ]
      55                 :      43161 :     QuantifiersEngine* qe = d_te.getQuantifiersEngine();
      56 [ -  + ][ -  + ]:      43161 :     Assert(qe != nullptr);
                 [ -  - ]
      57                 :      43161 :     d_masterEENotify.reset(new quantifiers::MasterNotifyClass(qe));
      58                 :      86322 :     d_masterEqualityEngine = std::make_unique<eq::EqualityEngine>(
      59                 :     129483 :         d_env, c, *d_masterEENotify.get(), "theory::master", false);
      60                 :            :   }
      61                 :            :   // allocate equality engines per theory
      62                 :      49892 :   for (TheoryId theoryId = theory::THEORY_FIRST;
      63         [ +  + ]:     748380 :        theoryId != theory::THEORY_LAST;
      64                 :     698488 :        ++theoryId)
      65                 :            :   {
      66                 :     698488 :     Theory* t = d_te.theoryOf(theoryId);
      67         [ -  + ]:     698488 :     if (t == nullptr)
      68                 :            :     {
      69                 :            :       // theory not active, skip
      70                 :     149701 :       continue;
      71                 :            :     }
      72                 :            :     // always allocate an object in d_einfo here
      73                 :     698488 :     EeTheoryInfo& eet = d_einfo[theoryId];
      74                 :     698488 :     EeSetupInfo esi;
      75         [ +  + ]:     698488 :     if (!t->needsEqualityEngine(esi))
      76                 :            :     {
      77                 :            :       // the theory said it doesn't need an equality engine, skip
      78                 :      99809 :       continue;
      79                 :            :     }
      80         [ +  + ]:     598679 :     if (esi.d_useMaster)
      81                 :            :     {
      82                 :            :       // the theory said it wants to use the master equality engine
      83                 :      49892 :       eet.d_usedEe = d_masterEqualityEngine.get();
      84                 :      49892 :       continue;
      85                 :            :     }
      86                 :            :     // allocate the equality engine
      87                 :     548787 :     eet.d_allocEe.reset(allocateEqualityEngine(esi, c));
      88                 :            :     // the theory uses the equality engine
      89                 :     548787 :     eet.d_usedEe = eet.d_allocEe.get();
      90                 :            :     // if there is a master equality engine
      91         [ +  + ]:     548787 :     if (d_masterEqualityEngine != nullptr)
      92                 :            :     {
      93                 :            :       // set the master equality engine of the theory's equality engine
      94                 :     474771 :       eet.d_allocEe->setMasterEqualityEngine(d_masterEqualityEngine.get());
      95                 :            :     }
      96         [ +  + ]:     698488 :   }
      97                 :      49892 : }
      98                 :            : 
      99                 :      23848 : void EqEngineManagerDistributed::notifyModel(CVC5_UNUSED bool incomplete)
     100                 :            : {
     101                 :            :   // should have a consistent master equality engine
     102         [ +  + ]:      23848 :   if (d_masterEqualityEngine.get() != nullptr)
     103                 :            :   {
     104 [ -  + ][ -  + ]:      19154 :     AlwaysAssert(d_masterEqualityEngine->consistent());
                 [ -  - ]
     105                 :            :   }
     106                 :      23848 : }
     107                 :            : 
     108                 :            : }  // namespace theory
     109                 :            : }  // namespace cvc5::internal