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add dependencies lost in case of an empty intersection

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Signed-off-by: Lev Nachmanson <levnach@hotmail.com>
This commit is contained in:
Lev Nachmanson 2020-04-08 15:46:41 -07:00
parent 4621767968
commit c5e08f0444
1 changed files with 3 additions and 1 deletions
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4
src/math/lp/nla_intervals.cpp
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@ -350,6 +350,7 @@ bool intervals::interval_of_sum(const nex_sum& e, scoped_dep_interval& a, const
if(! interval_of_sum_no_term<wd>(e, a, f)) {
return false;
}
TRACE("nla_intervals_details", tout << "a = "; display(tout, a););
if (e.is_a_linear_term()) {
SASSERT(e.is_sum() && e.size() > 1);
scoped_dep_interval i_from_term(get_dep_intervals());
@ -363,6 +364,8 @@ bool intervals::interval_of_sum(const nex_sum& e, scoped_dep_interval& a, const
T expl;
get_dep_intervals().linearize(r.m_upper_dep, expl);
get_dep_intervals().linearize(r.m_lower_dep, expl);
get_dep_intervals().linearize(a.get().m_upper_dep, expl);
get_dep_intervals().linearize(a.get().m_lower_dep, expl);
f(expl);
} else {
// need to recalculate the interval with dependencies
@ -372,7 +375,6 @@ bool intervals::interval_of_sum(const nex_sum& e, scoped_dep_interval& a, const
return false;
}
m_dep_intervals.set<wd>(a, r);
}
}
return true;