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https://github.com/Z3Prover/z3
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54 lines
1.8 KiB
C++
54 lines
1.8 KiB
C++
/*++
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Copyright (c) 2012 Microsoft Corporation
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Module Name:
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solver_na2as.h
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Abstract:
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Solver that implements "named" assertions using assumptions (aka answer literals).
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That is, a named assertion assert_expr(t, a) is mapped into
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a implies t
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and 'a' is used as an extra assumption for check_sat.
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Author:
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Leonardo (leonardo) 2012-11-02
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Notes:
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--*/
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#pragma once
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#include "solver/solver.h"
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class solver_na2as : public solver {
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protected:
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expr_ref_vector m_assumptions;
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unsigned_vector m_scopes;
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void restore_assumptions(unsigned old_sz);
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public:
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solver_na2as(ast_manager & m);
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void assert_expr_core2(expr * t, expr * a) override;
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// Subclasses of solver_na2as should redefine the following *_core methods instead of these ones.
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lbool check_sat_core(unsigned num_assumptions, expr * const * assumptions) override;
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lbool check_sat_cc(const expr_ref_vector &assumptions, vector<expr_ref_vector> const &clauses) override;
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void push() override;
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void pop(unsigned n) override;
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unsigned get_scope_level() const override;
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unsigned get_num_assumptions() const override { return m_assumptions.size(); }
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expr * get_assumption(unsigned idx) const override { return m_assumptions[idx]; }
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lbool get_consequences(expr_ref_vector const& asms, expr_ref_vector const& vars, expr_ref_vector& consequences) override;
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lbool find_mutexes(expr_ref_vector const& vars, vector<expr_ref_vector>& mutexes) override;
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protected:
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virtual lbool check_sat_core2(unsigned num_assumptions, expr * const * assumptions) = 0;
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virtual lbool check_sat_cc_core(const expr_ref_vector &assumptions, vector<expr_ref_vector> const &clauses) { NOT_IMPLEMENTED_YET(); return l_undef; }
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virtual void push_core() = 0;
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virtual void pop_core(unsigned n) = 0;
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};
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