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two bugs: check for always false, adjust start of list was incorrect during re-insert

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This commit is contained in:
Nikolaj Bjorner 2022-02-02 07:37:35 -08:00
parent 1a36b74143
commit 32edbfa28e
4 changed files with 13 additions and 13 deletions
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3
src/math/polysat/explain.cpp
View file

@ -165,10 +165,9 @@ namespace polysat {
auto c2 = s.ule(a, b);
if (!c.is_positive())
c2 = ~c2;
LOG("try-reduce is false " << c2.is_currently_false(s));
if (!c2.is_currently_false(s))
continue;
if (c2.bvalue(s) == l_false)
if (c2.is_always_false() || c2.bvalue(s) == l_false)
return false;
if (!c2->has_bvar() || l_undef == c2.bvalue(s)) {
vector<signed_constraint> premises;

8
src/math/polysat/forbidden_intervals.cpp
View file

@ -73,11 +73,9 @@ namespace polysat {
// a*v <= 0, a odd
if (match_zero(c, a1, b1, e1, a2, b2, e2, fi))
return true;
// a*v + b > 0, a odd
if (match_non_zero_linear(c, a1, b1, e1, a2, b2, e2, fi))
return true;
if (match_linear1(c, a1, b1, e1, a2, b2, e2, fi))
return true;
if (match_linear2(c, a1, b1, e1, a2, b2, e2, fi))
@ -349,7 +347,7 @@ namespace polysat {
signed_constraint const& c,
rational const & a1, pdd const& b1, pdd const& e1,
fi_record& fi) {
if (a1.is_odd() && b1.is_zero() && !c.is_positive()) {
if (a1.is_odd() && b1.is_zero() && c.is_negative()) {
auto& m = e1.manager();
rational lo_val(0);
auto lo = m.zero();
@ -361,7 +359,7 @@ namespace polysat {
fi.side_cond.push_back(s.eq(b1, e1));
return true;
}
if (a1.is_odd() && b1.is_val() && !c.is_positive()) {
if (a1.is_odd() && b1.is_val() && c.is_negative()) {
auto& m = e1.manager();
rational const& mod_value = m.two_to_N();
rational a1_inv;
@ -389,7 +387,7 @@ namespace polysat {
signed_constraint const& c,
rational const & a2, pdd const& b2, pdd const& e2,
fi_record& fi) {
if (a2.is_one() && b2.is_val() && !c.is_positive()) {
if (a2.is_one() && b2.is_val() && c.is_negative()) {
auto& m = e2.manager();
rational const& mod_value = m.two_to_N();
rational lo_val(mod(-b2.val() - 1, mod_value));

11
src/math/polysat/viable.cpp
View file

@ -46,9 +46,11 @@ namespace polysat {
void viable::pop_viable() {
auto& [v, k, e] = m_trail.back();
SASSERT(well_formed(m_units[v]));
switch (k) {
case entry_kind::unit_e:
e->remove_from(m_units[v], e);
SASSERT(well_formed(m_units[v]));
break;
case entry_kind::equal_e:
e->remove_from(m_equal_lin[v], e);
@ -67,13 +69,15 @@ namespace polysat {
SASSERT(e->prev() != e || e->next() == e);
SASSERT(k == entry_kind::unit_e);
(void)k;
SASSERT(well_formed(m_units[v]));
if (e->prev() != e) {
e->prev()->insert_after(e);
if (e->interval.lo_val() < e->next()->interval.lo_val())
if (e->interval.lo_val() < m_units[v]->interval.lo_val())
m_units[v] = e;
}
else
m_units[v] = e;
m_units[v] = e;
SASSERT(well_formed(m_units[v]));
m_trail.pop_back();
}
@ -102,6 +106,7 @@ namespace polysat {
}
void viable::insert(entry* e, pvar v, ptr_vector<entry>& entries, entry_kind k) {
SASSERT(well_formed(m_units[v]));
m_trail.push_back({ v, k, e });
s.m_trail.push_back(trail_instr_t::viable_add_i);
e->init(e);
@ -109,6 +114,7 @@ namespace polysat {
entries[v] = e;
else
e->insert_after(entries[v]);
SASSERT(well_formed(m_units[v]));
}
bool viable::intersect(pvar v, entry* ne) {
@ -441,6 +447,7 @@ namespace polysat {
return refine_viable(v, val);
}
rational viable::min_viable(pvar v) {
refined:
rational lo(0);

4
src/test/polysat.cpp
View file

@ -1375,10 +1375,6 @@ namespace polysat {
void tst_polysat() {
using namespace polysat;
test_polysat::test_ineq1();
test_polysat::test_ineq2();
test_polysat::test_monot();
return;
test_polysat::test_fi_zero();
test_polysat::test_fi_nonzero();