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enable reduce_by, more tests

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This commit is contained in:
Nikolaj Bjorner 2021-09-19 13:41:39 -04:00
parent 58c66ffee8
commit c69c316b27
7 changed files with 142 additions and 36 deletions
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15
src/math/polysat/explain.cpp
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@ -93,7 +93,7 @@ namespace polysat {
}
void ex_polynomial_superposition::reduce_by(pvar v, conflict_core& core) {
return;
//return;
bool progress = true;
while (progress) {
progress = false;
@ -111,6 +111,10 @@ namespace polysat {
for (auto c : core) {
if (c == eq)
continue;
if (is_positive_equality_over(v, c))
continue;
if (!c.is_currently_false(s()))
continue;
if (c->is_ule()) {
auto lhs = c->to_ule().lhs();
auto rhs = c->to_ule().rhs();
@ -121,10 +125,11 @@ namespace polysat {
auto c2 = s().ule(a, b);
if (!c.is_positive())
c2 = ~c2;
vector<signed_constraint> premises;
premises.push_back(eq);
premises.push_back(c);
core.replace(c, c2, premises);
SASSERT(c2.is_currently_false(s()));
if (!c2->has_bvar() || l_undef == c2.bvalue(s()))
core.keep(c2); // adds propagation of c to the search stack
core.reset();
core.set(c2);
return true;
}
}