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Polysat: constraint refactor cont'd, deduplicate constraints (#5520)

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* Assign boolean variables only to long-lived constraints, and deduplicate constraints when they are created

* scoped_signed_constraint

* update other classes

* fix

* Don't use scoped_ptr<constraint> with dedup()
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Jakob Rath 2021-08-30 19:00:27 +02:00 • committed by GitHub
parent ebaea2159e
commit 0c1e44da77
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16 changed files with 365 additions and 298 deletions
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src/math/polysat/eq_constraint.cpp
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@ -121,7 +121,7 @@ namespace polysat {
/// Compute forbidden interval for equality constraint by considering it as p <=u 0 (or p >u 0 for disequality)
bool eq_constraint::forbidden_interval(solver& s, bool is_positive, pvar v, eval_interval& out_interval, constraint_literal_ref& out_neg_cond)
bool eq_constraint::forbidden_interval(solver& s, bool is_positive, pvar v, eval_interval& out_interval, scoped_signed_constraint& out_neg_cond)
{
// Current only works when degree(v) is at most one
unsigned const deg = p().degree(v);