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https://github.com/Z3Prover/z3
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63 lines
1.4 KiB
C++
63 lines
1.4 KiB
C++
/*++
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Copyright (c) 2012 Microsoft Corporation
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Module Name:
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nlsat_evaluator.h
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Abstract:
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Helper class for computing the infeasible intervals of an
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arithmetic literal.
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Author:
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Leonardo de Moura (leonardo) 2012-01-12.
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Revision History:
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--*/
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#ifndef NLSAT_EVALUATOR_H_
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#define NLSAT_EVALUATOR_H_
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#include "nlsat/nlsat_types.h"
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#include "nlsat/nlsat_assignment.h"
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#include "nlsat/nlsat_interval_set.h"
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namespace nlsat {
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class solver;
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class evaluator {
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struct imp;
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imp * m_imp;
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public:
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evaluator(solver& s, assignment const & x2v, pmanager & pm, small_object_allocator & allocator);
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~evaluator();
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interval_set_manager & ism() const;
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/**
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\brief Evaluate the given literal in the current model.
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All variables in the atom must be assigned.
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The result is true if the literal is satisfied, and false otherwise.
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*/
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bool eval(atom * a, bool neg);
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/**
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\brief Return the infeasible interval set for the given literal.
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All but the a->max_var() must be assigned in the current model.
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Let x be a->max_var(). Then, the resultant set specifies which
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values of x falsify the given literal.
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*/
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interval_set_ref infeasible_intervals(atom * a, bool neg);
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void push();
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void pop(unsigned num_scopes);
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};
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};
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#endif
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