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Polysat: conflict explanation prototype (#5353)

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* display constraint's extra info in one place

* Add stub for conflict explainer

* Add helper functions to check whether constraint is active at base level

* Add helper class tmp_assign

* Add clause_builder; it skips unnecessary literals during clause creation

* some fixes

* Use clause_builder for forbidden intervals

* remove old comments

* fixes/comments in solver

* print redundant clauses

* First pass at conflict_explainer

* remove unused model class

* Choose value for k

* also print min/max k
This commit is contained in:
Jakob Rath 2021-06-17 17:35:32 +02:00 • committed by GitHub
parent 1fe7dc40fe
commit 3e1cfcd538
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11 changed files with 449 additions and 60 deletions
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src/math/polysat/eq_constraint.cpp
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@ -19,10 +19,8 @@ Author:
namespace polysat {
std::ostream& eq_constraint::display(std::ostream& out) const {
out << p() << (sign() == pos_t ? " == 0" : " != 0") << " @" << level() << " b" << bvar();
if (is_undef())
out << " [inactive]";
return out;
out << p() << (sign() == pos_t ? " == 0" : " != 0");
return display_extra(out);
}
constraint_ref eq_constraint::resolve(solver& s, pvar v) {