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smul no overflow

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2022-02-16 18:55:07 +02:00
parent 89d6f1c191
commit 8c9835bca6
24 changed files with 376 additions and 63 deletions
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34
src/math/polysat/viable.cpp
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@ -80,6 +80,40 @@ namespace polysat {
SASSERT(well_formed(m_units[v]));
m_trail.pop_back();
}
bool viable::intersect(pdd const & p, pdd const & q, signed_constraint const& sc) {
pvar v = null_var;
bool first = true;
bool prop = false;
if (p.is_unilinear())
v = p.var();
else if (q.is_unilinear())
v = q.var(), first = false;
else
return prop;
try_viable:
if (s.m_viable.intersect(v, sc)) {
rational val;
switch (s.m_viable.find_viable(v, val)) {
case dd::find_t::singleton:
s.propagate(v, val, sc); // TBD why is sc used as justification? It should be all of viable
prop = true;
break;
case dd::find_t::empty:
s.set_conflict(v);
return true;
default:
break;
}
}
if (first && q.is_unilinear() && q.var() != v) {
v = q.var();
first = false;
goto try_viable;
}
return prop;
}
bool viable::intersect(pvar v, signed_constraint const& c) {
auto& fi = s.m_forbidden_intervals;