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remove eq constraint, fix gc for external constraints

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2021-09-11 20:09:28 +02:00
parent f8a3857adb
commit b36bc11b85
15 changed files with 133 additions and 275 deletions
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13
src/math/polysat/forbidden_intervals.cpp
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@ -180,11 +180,12 @@ namespace polysat {
bool forbidden_intervals::get_interval(solver& s, signed_constraint const& c, pvar v, eval_interval& out_interval, signed_constraint& out_neg_cond)
{
inequality ineq = c.as_inequality();
if (!c->is_ule())
return false;
// Current only works when degree(v) is at most one on both sides
pdd lhs = ineq.lhs;
pdd rhs = ineq.rhs;
if (ineq.is_strict)
pdd lhs = c->to_ule().lhs();
pdd rhs = c->to_ule().rhs();
if (!c.is_positive())
swap(lhs, rhs);
unsigned const deg1 = lhs.degree(v);
unsigned const deg2 = rhs.degree(v);
@ -317,7 +318,7 @@ namespace polysat {
out_neg_cond = s.m_constraints.eq(condition_body);
if (is_trivial) {
if (!ineq.is_strict)
if (c.is_positive())
// TODO: we cannot use empty intervals for interpolation. So we
// can remove the empty case (make it represent 'full' instead),
// and return 'false' here. Then we do not need the proper/full
@ -345,7 +346,7 @@ namespace polysat {
else
SASSERT(y_coeff.is_one());
if (ineq.is_strict) {
if (!c.is_positive()) {
swap(lo, hi);
lo_val.swap(hi_val);
}