LCOV - code coverage report
Current view: top level - buildbot/coverage/build/src/theory/arith - branch_and_bound.h (source / functions) Hit Total Coverage
Test: coverage.info Lines: 1 1 100.0 %
Date: 2025-02-22 13:05:26 Functions: 1 2 50.0 %
Branches: 0 0 -

           Branch data     Line data    Source code
       1                 :            : /******************************************************************************
       2                 :            :  * Top contributors (to current version):
       3                 :            :  *   Andrew Reynolds, Andres Noetzli
       4                 :            :  *
       5                 :            :  * This file is part of the cvc5 project.
       6                 :            :  *
       7                 :            :  * Copyright (c) 2009-2025 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                 :            :  * Branch and bound for arithmetic
      14                 :            :  */
      15                 :            : 
      16                 :            : #include "cvc5_private.h"
      17                 :            : 
      18                 :            : #ifndef CVC5__THEORY__ARITH__BRANCH_AND_BOUND__H
      19                 :            : #define CVC5__THEORY__ARITH__BRANCH_AND_BOUND__H
      20                 :            : 
      21                 :            : #include <map>
      22                 :            : 
      23                 :            : #include "expr/node.h"
      24                 :            : #include "proof/proof_node_manager.h"
      25                 :            : #include "proof/trust_node.h"
      26                 :            : #include "smt/env_obj.h"
      27                 :            : #include "theory/arith/inference_manager.h"
      28                 :            : #include "theory/arith/pp_rewrite_eq.h"
      29                 :            : #include "theory/theory_state.h"
      30                 :            : #include "util/rational.h"
      31                 :            : 
      32                 :            : namespace cvc5::internal {
      33                 :            : namespace theory {
      34                 :            : namespace arith {
      35                 :            : 
      36                 :            : /**
      37                 :            :  * Class is responsible for constructing branch and bound lemmas. It is
      38                 :            :  * agnostic to the state of solver; instead is simply given (variable, value)
      39                 :            :  * pairs in branchIntegerVariable below and constructs the appropriate lemma.
      40                 :            :  */
      41                 :            : class BranchAndBound : protected EnvObj
      42                 :            : {
      43                 :            :  public:
      44                 :            :   BranchAndBound(Env& env,
      45                 :            :                  TheoryState& s,
      46                 :            :                  InferenceManager& im,
      47                 :            :                  PreprocessRewriteEq& ppre);
      48                 :      50752 :   ~BranchAndBound() {}
      49                 :            :   /**
      50                 :            :    * Branch variable, called when integer var has given value
      51                 :            :    * in the current model, returns a split to eliminate this model.
      52                 :            :    *
      53                 :            :    * @param var The variable to branch on
      54                 :            :    * @param value Its current model value
      55                 :            :    */
      56                 :            :   std::vector<TrustNode> branchIntegerVariable(TNode var, Rational value);
      57                 :            : 
      58                 :            :  private:
      59                 :            :   /** Are proofs enabled? */
      60                 :            :   bool proofsEnabled() const;
      61                 :            :   /** Reference to the state */
      62                 :            :   TheoryState& d_astate;
      63                 :            :   /** Reference to the inference manager */
      64                 :            :   InferenceManager& d_im;
      65                 :            :   /** Reference to the preprocess rewriter for equality */
      66                 :            :   PreprocessRewriteEq& d_ppre;
      67                 :            :   /** Proof generator. */
      68                 :            :   std::unique_ptr<EagerProofGenerator> d_pfGen;
      69                 :            : };
      70                 :            : 
      71                 :            : }  // namespace arith
      72                 :            : }  // namespace theory
      73                 :            : }  // namespace cvc5::internal
      74                 :            : 
      75                 :            : #endif

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