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fix #2778

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This commit is contained in:
Nikolaj Bjorner 2019-12-03 12:53:06 +01:00
parent 9af4cc0fd6
commit b35ec49b40
1 changed files with 7 additions and 4 deletions
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11
src/smt/theory_diff_logic_def.h
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@ -192,10 +192,13 @@ bool theory_diff_logic<Ext>::internalize_atom(app * n, bool gate_ctx) {
found_non_diff_logic_expr(n);
return false;
}
SASSERT(m_signs.size() == m_terms.size());
if (m_terms.size() == 2 && m_signs[0] != m_signs[1]) {
target = mk_var(m_terms[0].get());
source = mk_var(m_terms[1].get());
if (!m_signs[0]) {
app* a = m_terms.get(0), *b = m_terms.get(1);
bool sign0 = m_signs[0];
target = mk_var(a);
source = mk_var(b);
if (!sign0) {
std::swap(target, source);
}
}
@ -384,7 +387,7 @@ void theory_diff_logic<Ext>::del_atoms(unsigned old_size) {
template<typename Ext>
bool theory_diff_logic<Ext>::decompose_linear(app_ref_vector& terms, svector<bool>& signs) {
for (unsigned i = 0; i < terms.size(); ++i) {
app* n = terms[i].get();
app* n = terms.get(i);
bool sign;
if (m_util.is_add(n)) {
expr* arg = n->get_arg(0);