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fixing bugs uncovered by repro in #1914

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2018-11-05 13:54:23 -08:00
parent cf4bf7b591
commit f699ac0353
2 changed files with 13 additions and 5 deletions
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12
src/smt/theory_arith_aux.h
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@ -491,13 +491,21 @@ namespace smt {
if (!it->is_dead()) {
unsigned rid = it->m_row_id;
row & r = m_rows[rid];
if (is_base(r.get_base_var()))
theory_var v = r.get_base_var();
if (v == null_theory_var) {
// skip
}
else if (is_base(v)) {
return it;
}
else if (quasi_base_rid == -1)
quasi_base_rid = rid;
}
}
SASSERT(quasi_base_rid != -1); // since c.size() != 0
if (quasi_base_rid == -1) {
return nullptr;
}
quasi_base_row2base_row(quasi_base_rid);
// There is no guarantee that v is still a variable of row quasi_base_rid.