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working on udoc

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2014-09-21 20:25:11 -07:00
parent a50cbef877
commit 22808a039d
17 changed files with 171 additions and 39 deletions
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28
src/muz/rel/doc.cpp
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@ -434,6 +434,34 @@ bool doc_manager::equals(doc const& a, doc const& b) const {
bool doc_manager::is_full(doc const& src) const {
return src.neg().is_empty() && m.equals(src.pos(), *m_full);
}
bool doc_manager::is_empty(doc const& src) {
if (src.neg().size() == 0) return false;
if (src.neg().size() == 1) {
return m.equals(src.pos(), src.neg()[0]);
}
tbv_ref pos(m, m.allocate(src.pos()));
for (unsigned i = 0; i < src.neg().size(); ++i) {
bool found = false;
for (unsigned j = 0; !found && j < num_tbits(); ++j) {
tbit b1 = (*pos)[j];
tbit b2 = src.neg()[i][j];
found = (b1 != BIT_x && b2 != BIT_x && b1 != b2);
}
for (unsigned j = 0; !found && j < num_tbits(); ++j) {
tbit b1 = (*pos)[j];
tbit b2 = src.neg()[i][j];
found = (b1 == BIT_x && b2 != BIT_x);
if (found) {
pos->set(j, neg(b2));
}
}
if (!found) {
return false; // TBD make complete SAT check.
}
}
return true;
}
unsigned doc_manager::hash(doc const& src) const {
unsigned r = 0;
for (unsigned i = 0; i < src.neg().size(); ++i) {