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handle empty clauses created as lemmas as unsat state.

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add unit tests
This commit is contained in:
Nikolaj Bjorner 2021-09-19 15:43:47 -04:00
parent c69c316b27
commit 1e3ff3179e
10 changed files with 113 additions and 80 deletions
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7
src/math/dd/dd_pdd.cpp
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@ -1643,6 +1643,13 @@ namespace dd {
return *this;
}
pdd& pdd::operator=(unsigned k) {
m.dec_ref(root);
root = m.mk_val(k).root;
m.inc_ref(root);
return *this;
}
std::ostream& operator<<(std::ostream& out, pdd const& b) { return b.display(out); }
void pdd_iterator::next() {

1
src/math/dd/dd_pdd.h
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@ -386,6 +386,7 @@ namespace dd {
pdd(pdd const& other): root(other.root), m(other.m) { m.inc_ref(root); }
pdd(pdd && other) noexcept : root(0), m(other.m) { std::swap(root, other.root); }
pdd& operator=(pdd const& other);
pdd& operator=(unsigned k);
~pdd() { m.dec_ref(root); }
pdd lo() const { return pdd(m.lo(root), m); }
pdd hi() const { return pdd(m.hi(root), m); }