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46 lines
1.1 KiB
C++
46 lines
1.1 KiB
C++
/*++
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Copyright (c) 2021 Microsoft Corporation
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Module Name:
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Conflict explanation
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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/conflict.h"
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#include "math/polysat/constraint.h"
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#include "math/polysat/clause_builder.h"
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#include "math/polysat/interval.h"
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namespace polysat {
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class solver;
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class explainer {
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friend class conflict;
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protected:
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solver& s;
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public:
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explainer(solver& s) :s(s) {}
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virtual ~explainer() {}
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virtual bool try_explain(pvar v, conflict& core) = 0;
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};
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class ex_polynomial_superposition : public explainer {
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private:
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signed_constraint resolve1(pvar v, signed_constraint c1, signed_constraint c2);
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lbool find_replacement(signed_constraint c2, pvar v, conflict& core);
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void reduce_by(pvar v, conflict& core);
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bool reduce_by(pvar, signed_constraint c, conflict& core);
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lbool try_explain1(pvar v, conflict& core);
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public:
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ex_polynomial_superposition(solver& s) : explainer(s) {}
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bool try_explain(pvar v, conflict& core) override;
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};
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}
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