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#5417 normalize clause

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This commit is contained in:
Nikolaj Bjorner 2021-07-19 09:08:51 -07:00
parent 7d915eb295
commit 776f270b64
2 changed files with 13 additions and 1 deletions
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4
src/sat/smt/q_clause.h
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@ -29,7 +29,9 @@ namespace q {
expr_ref rhs;
bool sign;
lit(expr_ref const& lhs, expr_ref const& rhs, bool sign):
lhs(lhs), rhs(rhs), sign(sign) {}
lhs(lhs), rhs(rhs), sign(sign) {
SASSERT(!rhs.m().is_false(rhs) || !sign);
}
std::ostream& display(std::ostream& out) const;
};

10
src/sat/smt/q_ematch.cpp
View file

@ -419,6 +419,16 @@ namespace q {
r = sign ? m.mk_false() : m.mk_true();
sign = false;
}
if (m.is_true(l) || m.is_false(l))
std::swap(l, r);
if (sign && m.is_false(r)) {
r = m.mk_true();
sign = false;
}
else if (sign && m.is_true(r)) {
r = m.mk_false();
sign = false;
}
cl->m_lits.push_back(lit(expr_ref(l, m), expr_ref(r, m), sign));
}
if (q->get_num_patterns() == 0) {