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Polysat: conflict resolution updates (#5534)

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* variable elimination / saturation sketch

* conflict resolution updates
This commit is contained in:
Jakob Rath 2021-09-03 19:17:06 +02:00 • committed by GitHub
parent dc547510db
commit 9f387f5738
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14 changed files with 343 additions and 294 deletions
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34
src/math/polysat/explain.h
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@ -19,40 +19,6 @@ Author:
namespace polysat {
class solver;
class conflict_explainer;
class inference_engine {
public:
virtual ~inference_engine() {}
/** Try to apply an inference rule. Returns true if a new constraint was added to the core. */
virtual bool perform(conflict_explainer& ce) = 0;
};
class inf_polynomial_superposition final : public inference_engine {
public:
bool perform(conflict_explainer& ce) override;
};
// TODO: other rules
// clause_ref by_ugt_x();
// clause_ref by_ugt_y();
// clause_ref by_ugt_z();
// clause_ref y_ule_ax_and_x_ule_z();
class core_saturation final {
scoped_ptr_vector<inference_engine> inference_engines;
public:
/// Derive new constraints from constraints containing the variable v (i.e., at least one premise must contain v)
bool saturate(pvar v, conflict_core& core) { NOT_IMPLEMENTED_YET(); return false; }
};
#if 0
class conflict_explainer {