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fix #5456

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This commit is contained in:
Nikolaj Bjorner 2021-08-04 10:07:29 -07:00
parent 939860148f
commit a39d1c6188
1 changed files with 17 additions and 13 deletions
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30
src/tactic/core/pb_preprocess_tactic.cpp
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@ -44,7 +44,6 @@ class pb_preprocess_tactic : public tactic {
struct rec { unsigned_vector pos, neg; rec() { } };
typedef obj_map<app, rec> var_map;
ast_manager& m;
expr_ref_vector m_trail;
pb_util pb;
var_map m_vars;
unsigned_vector m_ge;
@ -100,7 +99,7 @@ class pb_preprocess_tactic : public tactic {
public:
pb_preprocess_tactic(ast_manager& m, params_ref const& p = params_ref()):
m(m), m_trail(m), pb(m), m_r(m) {}
m(m), pb(m), m_r(m) {}
~pb_preprocess_tactic() override {}
@ -122,7 +121,6 @@ public:
g->inc_depth();
result.push_back(g.get());
while (simplify(g, *pp));
m_trail.reset();
// decompose(g);
}
@ -141,7 +139,8 @@ public:
}
for (unsigned i = 0; i < m_ge.size(); ++i) {
classify_vars(i, to_app(g->form(m_ge[i])));
if (!classify_vars(i, to_app(g->form(m_ge[i]))))
return false;
}
declassifier dcl(m_vars);
@ -379,15 +378,15 @@ private:
}
}
void classify_vars(unsigned idx, app* e) {
bool classify_vars(unsigned idx, app* e) {
expr* r;
if (m.is_not(e, r) && is_uninterp_const(r)) {
insert(idx, to_app(r), false);
return;
return true;
}
if (is_uninterp_const(e)) {
insert(idx, e, true);
return;
return true;
}
for (unsigned i = 0; i < e->get_num_args(); ++i) {
expr* arg = e->get_arg(i);
@ -395,20 +394,22 @@ private:
// no-op
}
else if (m.is_not(arg, r)) {
SASSERT(is_uninterp_const(r));
if (!is_uninterp_const(r))
return false;
insert(idx, to_app(r), false);
}
else {
SASSERT(is_uninterp_const(arg));
if (!is_uninterp_const(arg))
return false;
insert(idx, to_app(arg), true);
}
}
return true;
}
void insert(unsigned i, app* e, bool pos) {
SASSERT(is_uninterp_const(e));
if (!m_vars.contains(e)) {
m_trail.push_back(e);
m_vars.insert(e, rec());
}
if (pos) {
@ -503,7 +504,10 @@ private:
bool found = false;
for (unsigned j = 0; j < args2.size(); ++j) {
if (is_complement(args1.get(i), args2.get(j))) {
if (i == 0 || min_coeff > coeffs2[j]) {
if (i == 0) {
min_coeff = coeffs2[j];
}
else if (min_coeff > coeffs2[j]) {
min_coeff = coeffs2[j];
min_index = j;
}
@ -514,9 +518,9 @@ private:
if (!found)
return;
}
for (unsigned j : indices) {
for (unsigned i = 0; i < indices.size(); ++i) {
unsigned j = indices[i];
expr* arg = args2.get(j);
TRACE("pb", tout << "j " << j << " " << min_index << "\n";);
if (j == min_index) {
args2[j] = m.mk_false();
}