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fix bug in root setting exposed by incremental mode pb_solver

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This commit is contained in:
Nikolaj Bjorner 2022-01-18 10:55:27 +01:00
parent 36cfb88f5f
commit 06feb71eb1
3 changed files with 18 additions and 12 deletions
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14
src/sat/smt/pb_solver.cpp
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@ -2193,12 +2193,13 @@ namespace pb {
}
bool solver::set_root(literal l, literal r) {
if (s().is_assumption(l.var())) {
if (s().is_assumption(l.var()))
return false;
}
reserve_roots();
m_roots[l.index()] = r;
m_roots[(~l).index()] = ~r;
m_roots[r.index()] = r;
m_roots[(~r).index()] = ~r;
m_root_vars[l.var()] = true;
return true;
}
@ -2214,7 +2215,6 @@ namespace pb {
flush_roots(*m_learned[i]);
cleanup_constraints();
// validate();
// validate_eliminated();
}
@ -2225,7 +2225,8 @@ namespace pb {
void solver::validate_eliminated(ptr_vector<constraint> const& cs) {
for (constraint const* c : cs) {
if (c->learned()) continue;
if (c->learned())
continue;
for (auto l : constraint::literal_iterator(*c))
VERIFY(!s().was_eliminated(l.var()));
}
@ -2449,9 +2450,10 @@ namespace pb {
for (unsigned i = 0; !found && i < c.size(); ++i) {
found = m_root_vars[c.get_lit(i).var()];
}
if (!found) return;
if (!found)
return;
clear_watch(c);
// this could create duplicate literals
for (unsigned i = 0; i < c.size(); ++i) {
literal lit = m_roots[c.get_lit(i).index()];