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fix in simplify sum

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Signed-off-by: Lev Nachmanson <levnach@nachmanson.com>
This commit is contained in:
Lev Nachmanson 2019-10-18 16:24:44 -07:00 committed by Lev Nachmanson
parent 64b189d932
commit 7acc679144
1 changed files with 10 additions and 2 deletions
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12
src/math/lp/nex_creator.cpp
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@ -500,15 +500,23 @@ nex * nex_creator::simplify_mul(nex_mul *e) {
}
nex* nex_creator::simplify_sum(nex_sum *e) {
TRACE("nla_cn", tout << lp::lp_settings::ddd << "\n";);
TRACE("nla_cn_details", tout << "was e = " << *e << "\n";);
simplify_children_of_sum(e->children());
nex *r = e->size() == 1? (*e)[0]: e;
nex *r;
if (e->size() == 1) {
r = (*e)[0];
} else if (e->size() == 0) {
r = mk_scalar(rational(0));
} else {
r = e;
}
TRACE("nla_cn_details", tout << "became r = " << *r << "\n";);
return r;
}
bool nex_creator::sum_is_simplified(const nex_sum* e) const {
if (e->size() < 2) return false;
if (e->size() < 2) return false;
bool scalar = false;
for (nex * ee : *e) {
if (ee->is_sum()) {