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Simplify equations into canonical form

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Also simplify constraints that are always false due to parity
This commit is contained in:
Jakob Rath 2022-09-28 13:17:14 +02:00
parent 480ba01cb0
commit 6715058876
4 changed files with 105 additions and 69 deletions
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16
src/math/polysat/constraint.cpp
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@ -203,7 +203,11 @@ namespace polysat {
}
signed_constraint constraint_manager::ule(pdd const& a, pdd const& b) {
return { dedup(alloc(ule_constraint, *this, a, b)), true };
bool is_positive = true;
pdd lhs = a;
pdd rhs = b;
ule_constraint::simplify(is_positive, lhs, rhs);
return { dedup(alloc(ule_constraint, *this, lhs, rhs)), is_positive };
}
signed_constraint constraint_manager::eq(pdd const& p) {
@ -215,18 +219,12 @@ namespace polysat {
}
bool signed_constraint::is_eq() const {
if (is_positive())
return m_constraint->is_eq();
else
return m_constraint->is_diseq();
return is_positive() && m_constraint->is_eq();
}
pdd const& signed_constraint::eq() const {
SASSERT(is_eq());
if (is_positive())
return m_constraint->to_ule().lhs();
else
return m_constraint->to_ule().rhs();
return m_constraint->to_ule().lhs();
}
/**