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fix #7602

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add missing relevancy propagation so that relationship between rel and TC(rel) are not lost to the theory solver.
This commit is contained in:
Nikolaj Bjorner 2025-04-14 15:38:22 -07:00
parent 8035edbe65
commit e41090df83
1 changed files with 11 additions and 3 deletions
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14
src/smt/theory_special_relations.cpp
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@ -276,7 +276,7 @@ namespace smt {
graph r_graph;
for (enode* n : ctx.enodes_of(f)) {
literal lit = ctx.enode2literal(n);
if (l_true == ctx.get_assignment(lit)) {
if (l_true == ctx.get_assignment(lit) && ctx.is_relevant(lit)) {
expr* e = ctx.bool_var2expr(lit.var());
expr* arg1 = to_app(e)->get_arg(0);
expr* arg2 = to_app(e)->get_arg(1);
@ -284,12 +284,14 @@ namespace smt {
enode* tcn = ensure_enode(tc_app);
if (ctx.get_assignment(tcn) != l_true) {
literal consequent = ctx.get_literal(tc_app);
ctx.mark_as_relevant(consequent);
justification* j = ctx.mk_justification(theory_propagation_justification(get_id(), ctx, 1, &lit, consequent));
TRACE("special_relations", tout << "propagate: " << tc_app << "\n";);
ctx.assign(consequent, j);
new_assertion = true;
}
else {
TRACE("special_relations", tout << "add edge " << tc_app << " relevant: " << ctx.is_relevant(tcn) << "\n");
theory_var v1 = get_representative(get_th_var(arg1));
theory_var v2 = get_representative(get_th_var(arg2));
r_graph.init_var(v1);
@ -333,6 +335,7 @@ namespace smt {
expr_ref f_app(m.mk_app(f, arg1, arg2), m);
ensure_enode(f_app);
literal f_lit = ctx.get_literal(f_app);
ctx.mark_as_relevant(f_lit);
switch (ctx.get_assignment(f_lit)) {
case l_true:
SASSERT(new_assertion);
@ -369,8 +372,12 @@ namespace smt {
while (r.is_next(nxt)) {
expr* left = to_app(nxt)->get_arg(0);
expr* right = to_app(nxt)->get_arg(1);
ctx.assign(~mk_eq(next, left, false), nullptr);
ctx.assign(~mk_eq(next, right, false), nullptr);
literal eq1 = mk_eq(next, left, false);
literal eq2 = mk_eq(next, right, false);
ctx.mark_as_relevant(eq1);
ctx.mark_as_relevant(eq2);
ctx.assign(~eq1, nullptr);
ctx.assign(~eq2, nullptr);
nxt = left;
}
ctx.set_true_first_flag(ctx.get_literal(next_b).var());
@ -600,6 +607,7 @@ namespace smt {
r.m_explanation.reset();
unsigned timestamp = r.m_graph.get_timestamp();
bool found_path = a.v1() == a.v2() || r.m_graph.find_shortest_reachable_path(a.v1(), a.v2(), timestamp, r);
TRACE("special_relations", tout << "check " << a.v1() << " -> " << a.v2() << " found_path: " << found_path << "\n");
if (found_path) {
TRACE("special_relations", tout << "check po conflict\n";);
r.m_explanation.push_back(a.explanation());