z3-z3-4.13.0.src.solver.solver_na2as.h Maven / Gradle / Ivy
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/*++
Copyright (c) 2012 Microsoft Corporation
Module Name:
solver_na2as.h
Abstract:
Solver that implements "named" assertions using assumptions (aka answer literals).
That is, a named assertion assert_expr(t, a) is mapped into
a implies t
and 'a' is used as an extra assumption for check_sat.
Author:
Leonardo (leonardo) 2012-11-02
Notes:
--*/
#pragma once
#include "solver/solver.h"
class solver_na2as : public solver {
protected:
expr_ref_vector m_assumptions;
unsigned_vector m_scopes;
void restore_assumptions(unsigned old_sz);
public:
solver_na2as(ast_manager & m);
~solver_na2as() override;
void assert_expr_core2(expr * t, expr * a) override;
// Subclasses of solver_na2as should redefine the following *_core methods instead of these ones.
lbool check_sat_core(unsigned num_assumptions, expr * const * assumptions) override;
lbool check_sat_cc(const expr_ref_vector &assumptions, vector const &clauses) override;
void push() override;
void pop(unsigned n) override;
unsigned get_scope_level() const override;
unsigned get_num_assumptions() const override { return m_assumptions.size(); }
expr * get_assumption(unsigned idx) const override { return m_assumptions[idx]; }
lbool get_consequences(expr_ref_vector const& asms, expr_ref_vector const& vars, expr_ref_vector& consequences) override;
lbool find_mutexes(expr_ref_vector const& vars, vector& mutexes) override;
protected:
virtual lbool check_sat_core2(unsigned num_assumptions, expr * const * assumptions) = 0;
virtual lbool check_sat_cc_core(const expr_ref_vector &assumptions, vector const &clauses) { NOT_IMPLEMENTED_YET(); return l_undef; }
virtual void push_core() = 0;
virtual void pop_core(unsigned n) = 0;
};