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fix #4227

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This commit is contained in:
Nikolaj Bjorner 2020-05-06 12:56:46 -07:00
parent 603b5552fa
commit 691759c9e2
3 changed files with 13 additions and 4 deletions
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8
src/smt/old_interval.cpp
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@ -473,6 +473,14 @@ interval & interval::operator*=(interval const & other) {
return *this;
}
bool interval::empty() const {
if (m_lower.is_infinite() || m_upper.is_infinite())
return false;
if (m_lower < m_upper)
return false;
return m_lower > m_upper || m_lower_open || m_upper_open;
}
bool interval::contains_zero() const {
TRACE("interval_zero_bug", tout << "contains_zero info: " << *this << "\n";
tout << "m_lower.is_neg(): " << m_lower.is_neg() << "\n";