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fix #6686

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This commit is contained in:
Nikolaj Bjorner 2023-04-12 20:13:24 -07:00
parent eba0732629
commit f0afbcbb87
2 changed files with 11 additions and 2 deletions
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9
src/math/interval/interval.h
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@ -72,6 +72,7 @@ public:
void set_upper_is_open(interval & a, bool v) { a.m_upper_open = v; }
void set_lower_is_inf(interval & a, bool v) { a.m_lower_inf = v; }
void set_upper_is_inf(interval & a, bool v) { a.m_upper_inf = v; }
// Reference to numeral manager
numeral_manager & m() const { return m_manager; }
@ -184,6 +185,14 @@ public:
bool upper_is_open(interval const & a) const { return m_c.upper_is_open(a); }
bool lower_is_inf(interval const & a) const { return m_c.lower_is_inf(a); }
bool upper_is_inf(interval const & a) const { return m_c.upper_is_inf(a); }
bool is_empty(interval const& a) const {
if (lower_is_inf(a) || upper_is_inf(a))
return false;
ext_numeral_kind lk = lower_kind(a), uk = upper_kind(a);
if (lower_is_open(a) || upper_is_open(a))
return !(::lt(m(), lower(a), lk, upper(a), uk));
return ::lt(m(), upper(a), uk, lower(a), lk);
}
bool lower_is_neg(interval const & a) const { return ::is_neg(m(), lower(a), lower_kind(a)); }
bool lower_is_pos(interval const & a) const { return ::is_pos(m(), lower(a), lower_kind(a)); }

4
src/math/interval/interval_def.h
View file

@ -681,7 +681,7 @@ void interval_manager<C>::set(interval & t, interval const & s) {
}
set_lower_is_open(t, lower_is_open(s));
set_upper_is_open(t, upper_is_open(s));
SASSERT(check_invariant(t));
SASSERT(is_empty(t) || check_invariant(t));
}
template<typename C>
@ -813,7 +813,7 @@ void interval_manager<C>::add(interval const & a, interval const & b, interval &
set_upper_is_inf(c, new_u_kind == EN_PLUS_INFINITY);
set_lower_is_open(c, lower_is_open(a) || lower_is_open(b));
set_upper_is_open(c, upper_is_open(a) || upper_is_open(b));
SASSERT(check_invariant(c));
SASSERT(is_empty(a) || is_empty(b) || check_invariant(c));
}
template<typename C>