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https://github.com/Z3Prover/z3
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52 lines
1.7 KiB
C++
52 lines
1.7 KiB
C++
/*++
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Copyright (c) 2021 Microsoft Corporation
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Module Name:
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polysat unsigned <= constraint
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Author:
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Nikolaj Bjorner (nbjorner) 2021-03-19
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Jakob Rath 2021-04-6
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--*/
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#pragma once
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#include "math/polysat/constraint.h"
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namespace polysat {
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class solver;
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class ule_constraint final : public constraint {
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friend class constraint_manager;
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pdd m_lhs;
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pdd m_rhs;
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ule_constraint(constraint_manager& m, pdd const& l, pdd const& r);
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void simplify();
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public:
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~ule_constraint() override {}
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pdd const& lhs() const { return m_lhs; }
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pdd const& rhs() const { return m_rhs; }
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std::ostream& display(std::ostream& out, lbool status) const override;
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std::ostream& display(std::ostream& out) const override;
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bool is_always_false(bool is_positive, pdd const& lhs, pdd const& rhs) const;
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bool is_always_false(bool is_positive) const override;
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bool is_currently_false(solver& s, bool is_positive) const override;
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bool is_currently_true(solver& s, bool is_positive) const override;
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bool is_currently_false(solver& s, assignment_t const& sub, bool is_positive) const override;
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bool is_currently_true(solver& s, assignment_t const& sub, bool is_positive) const override;
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void narrow(solver& s, bool is_positive, bool first) override;
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inequality as_inequality(bool is_positive) const override;
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unsigned hash() const override;
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bool operator==(constraint const& other) const override;
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bool is_eq() const override { return m_rhs.is_zero(); }
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bool is_diseq() const override { return m_lhs.is_one(); }
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// pdd const& p() const { SASSERT(is_eq()); return m_lhs; }
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};
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}
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