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https://github.com/Z3Prover/z3
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fd1758ffab
* Use scoped_ptr for condition * Check solver result in unit tests * Add test for unusual cjust * Add solver::get_value * Broken assertion * Support forbidden interval for coefficient -1
44 lines
1.3 KiB
C++
44 lines
1.3 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 ule_constraint : public constraint {
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pdd m_lhs;
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pdd m_rhs;
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public:
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ule_constraint(unsigned lvl, bool_var bvar, csign_t sign, pdd const& l, pdd const& r, p_dependency_ref const& dep):
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constraint(lvl, bvar, sign, dep, ckind_t::ule_t), m_lhs(l), m_rhs(r) {
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m_vars.append(l.free_vars());
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for (auto v : r.free_vars())
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if (!m_vars.contains(v))
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m_vars.push_back(v);
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}
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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) const override;
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constraint* resolve(solver& s, pvar v) override;
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bool is_always_false(pdd const& lhs, pdd const& rhs);
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bool is_always_false() override;
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bool is_currently_false(solver& s) override;
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bool is_currently_true(solver& s) override;
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void narrow(solver& s) override;
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bool forbidden_interval(solver& s, pvar v, eval_interval& out_interval, scoped_ptr<constraint>& out_neg_cond) override;
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};
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}
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