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Don't nest propgate() calls

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This commit is contained in:
Jakob Rath 2022-01-20 17:06:30 +01:00
parent c9b9b5f531
commit 64152c338d
3 changed files with 17 additions and 0 deletions
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11
src/math/polysat/solver.cpp
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@ -192,6 +192,10 @@ namespace polysat {
void solver::propagate() {
if (!can_propagate())
return;
static bool propagating = false;
if (propagating)
return;
propagating = true;
push_qhead();
while (can_propagate()) {
auto const& item = m_search[m_qhead++];
@ -230,14 +234,19 @@ namespace polysat {
*/
void solver::propagate(pvar v) {
LOG_H2("Propagate v" << v);
SASSERT(!m_locked_wlist);
DEBUG_CODE(m_locked_wlist = v;);
auto& wlist = m_pwatch[v];
unsigned i = 0, j = 0, sz = wlist.size();
LOG("wlist old: " << wlist);
for (; i < sz && !is_conflict(); ++i)
if (!wlist[i].propagate(*this, v))
wlist[j++] = wlist[i];
for (; i < sz; ++i)
wlist[j++] = wlist[i];
wlist.shrink(j);
LOG("wlist new: " << wlist);
DEBUG_CODE(m_locked_wlist = std::nullopt;);
}
bool solver::propagate(sat::literal lit, clause& cl) {
@ -374,6 +383,7 @@ namespace polysat {
void solver::add_watch(signed_constraint c, pvar v) {
SASSERT(c);
// SASSERT(m_locked_wlist != v); // appending doesn't interfere with propagation, so it should be fine
LOG("Watching v" << v << " in constraint " << c);
m_pwatch[v].push_back(c);
}
@ -389,6 +399,7 @@ namespace polysat {
void solver::erase_watch(pvar v, signed_constraint c) {
if (v == null_var)
return;
SASSERT(m_locked_wlist != v);
auto& wlist = m_pwatch[v];
unsigned sz = wlist.size();
for (unsigned i = 0; i < sz; ++i) {