LCOV - code coverage report
Current view: top level - buildbot/coverage/build/src/theory/arith - equality_solver.h (source / functions) Hit Total Coverage
Test: coverage.info Lines: 6 6 100.0 %
Date: 2026-03-30 10:41:07 Functions: 6 6 100.0 %
Branches: 0 0 -

           Branch data     Line data    Source code
       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                 :            :  * Arithmetic equality solver
      11                 :            :  */
      12                 :            : 
      13                 :            : #include "cvc5_private.h"
      14                 :            : 
      15                 :            : #ifndef CVC5__THEORY__ARITH__EQUALITY_SOLVER_H
      16                 :            : #define CVC5__THEORY__ARITH__EQUALITY_SOLVER_H
      17                 :            : 
      18                 :            : #include "context/cdhashset.h"
      19                 :            : #include "expr/node.h"
      20                 :            : #include "proof/trust_node.h"
      21                 :            : #include "smt/env_obj.h"
      22                 :            : #include "theory/ee_setup_info.h"
      23                 :            : #include "theory/theory_state.h"
      24                 :            : #include "theory/uf/equality_engine.h"
      25                 :            : 
      26                 :            : namespace cvc5::internal {
      27                 :            : namespace theory {
      28                 :            : namespace arith {
      29                 :            : 
      30                 :            : class InferenceManager;
      31                 :            : 
      32                 :            : namespace linear {
      33                 :            : class ArithCongruenceManager;
      34                 :            : }
      35                 :            : 
      36                 :            : /**
      37                 :            :  * The arithmetic equality solver. This class manages arithmetic equalities
      38                 :            :  * in the default way via an equality engine, or defers to the congruence
      39                 :            :  * manager of linear arithmetic if setCongruenceManager is called on a
      40                 :            :  * non-null congruence manager.
      41                 :            :  *
      42                 :            :  * Since arithmetic has multiple ways of propagating literals, it tracks
      43                 :            :  * the literals that it propagates and only explains the literals that
      44                 :            :  * originated from this class.
      45                 :            :  */
      46                 :            : class EqualitySolver : protected EnvObj
      47                 :            : {
      48                 :            :   using NodeSet = context::CDHashSet<Node>;
      49                 :            : 
      50                 :            :  public:
      51                 :            :   EqualitySolver(Env& env, TheoryState& astate, InferenceManager& aim);
      52                 :     101406 :   ~EqualitySolver() {}
      53                 :            :   //--------------------------------- initialization
      54                 :            :   /**
      55                 :            :    * Returns true if we need an equality engine, see
      56                 :            :    * Theory::needsEqualityEngine.
      57                 :            :    */
      58                 :            :   bool needsEqualityEngine(EeSetupInfo& esi);
      59                 :            :   /**
      60                 :            :    * Finish initialize
      61                 :            :    */
      62                 :            :   void finishInit();
      63                 :            :   //--------------------------------- end initialization
      64                 :            :   /**
      65                 :            :    * Pre-notify fact, return true if we are finished processing, false if
      66                 :            :    * we wish to assert the fact to the equality engine of this class.
      67                 :            :    */
      68                 :            :   bool preNotifyFact(
      69                 :            :       TNode atom, bool pol, TNode fact, bool isPrereg, bool isInternal);
      70                 :            :   /**
      71                 :            :    * Return an explanation for the literal lit (which was previously propagated
      72                 :            :    * by this solver).
      73                 :            :    */
      74                 :            :   TrustNode explain(TNode lit);
      75                 :            : 
      76                 :            :   /** Set the congruence manager, which will be notified of propagations */
      77                 :            :   void setCongruenceManager(linear::ArithCongruenceManager* acm);
      78                 :            : 
      79                 :            :  private:
      80                 :            :   /** Notification class from the equality engine */
      81                 :            :   class EqualitySolverNotify : public eq::EqualityEngineNotify
      82                 :            :   {
      83                 :            :    public:
      84                 :      51048 :     EqualitySolverNotify(EqualitySolver& es) : d_es(es) {}
      85                 :            : 
      86                 :            :     bool eqNotifyTriggerPredicate(TNode predicate, bool value) override;
      87                 :            : 
      88                 :            :     bool eqNotifyTriggerTermEquality(TheoryId tag,
      89                 :            :                                      TNode t1,
      90                 :            :                                      TNode t2,
      91                 :            :                                      bool value) override;
      92                 :            : 
      93                 :            :     void eqNotifyConstantTermMerge(TNode t1, TNode t2) override;
      94                 :    2590653 :     void eqNotifyNewClass(CVC5_UNUSED TNode t) override {}
      95                 :    3202131 :     void eqNotifyMerge(CVC5_UNUSED TNode t1, CVC5_UNUSED TNode t2) override {}
      96                 :     694283 :     void eqNotifyDisequal(CVC5_UNUSED TNode t1,
      97                 :            :                           CVC5_UNUSED TNode t2,
      98                 :            :                           CVC5_UNUSED TNode reason) override
      99                 :            :     {
     100                 :     694283 :     }
     101                 :            : 
     102                 :            :    private:
     103                 :            :     /** reference to parent */
     104                 :            :     EqualitySolver& d_es;
     105                 :            :   };
     106                 :            :   /** Propagate literal */
     107                 :            :   bool propagateLit(Node lit);
     108                 :            :   /** Conflict when two constants merge */
     109                 :            :   void conflictEqConstantMerge(TNode a, TNode b);
     110                 :            :   /** reference to the state */
     111                 :            :   TheoryState& d_astate;
     112                 :            :   /** reference to parent */
     113                 :            :   InferenceManager& d_aim;
     114                 :            :   /** Equality solver notify */
     115                 :            :   EqualitySolverNotify d_notify;
     116                 :            :   /** Pointer to the equality engine */
     117                 :            :   eq::EqualityEngine* d_ee;
     118                 :            :   /** The literals we have propagated */
     119                 :            :   NodeSet d_propLits;
     120                 :            :   /** Pointer to the congruence manager, for notifications of propagations */
     121                 :            :   linear::ArithCongruenceManager* d_acm;
     122                 :            : };
     123                 :            : 
     124                 :            : }  // namespace arith
     125                 :            : }  // namespace theory
     126                 :            : }  // namespace cvc5::internal
     127                 :            : 
     128                 :            : #endif

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