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Code Activity

Polysat: minor fixes (#5364)

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* update include paths

* bdd fixes

* update/fix some tests

* work around assertion failure when constraint from clause becomes unit

* Remove old code

* use clause_builder

* Verify model when returning SAT

* log

* fix
This commit is contained in:
Jakob Rath 2021-06-22 18:27:18 +02:00 • committed by GitHub
parent 52eb473c63
commit d7b8ea2f7f
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11 changed files with 73 additions and 95 deletions
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6
src/math/dd/dd_bdd.cpp
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@ -1037,7 +1037,8 @@ namespace dd {
std::function<bdd(unsigned)> get_a = [&](unsigned k) {
if (k < i)
return mk_false();
return a[i - k] && b[i];
else
return a[k - i] && b[i];
};
result = mk_add(result, get_a);
}
@ -1056,11 +1057,10 @@ namespace dd {
SASSERT(a.size() == b.size());
bddv result = mk_zero(a.size());
// use identity (bvmul a b) == (bvneg (bvmul (bvneg a) b))
unsigned cnt = 0;
for (auto v : b) if (v) cnt++;
if (cnt*2 > b.size())
if (cnt*2 > b.size()+1)
return mk_usub(mk_mul(a, mk_usub(b)));
for (unsigned i = 0; i < a.size(); ++i) {