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add patch to deal with bug exposed in issue #721

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2016-09-10 12:15:49 -07:00
parent 0b57829bdd
commit 1450594fc6
1 changed files with 30 additions and 6 deletions
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36
src/smt/theory_seq.cpp
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@ -2536,15 +2536,29 @@ public:
model_value_proc * theory_seq::mk_value(enode * n, model_generator & mg) {
if (m_util.is_seq(n->get_owner())) {
app* e = n->get_owner();
context& ctx = get_context();
expr* e1, *e2, *e3;
if (m.is_ite(e, e1, e2, e3) && ctx.e_internalized(e2) && ctx.e_internalized(e3) &&
(ctx.get_enode(e2)->get_root() == n->get_root() ||
ctx.get_enode(e3)->get_root() == n->get_root())) {
if (ctx.get_enode(e2)->get_root() == n->get_root()) {
return mk_value(ctx.get_enode(e2), mg);
}
else {
return mk_value(ctx.get_enode(e3), mg);
}
}
else if (m_util.is_seq(e)) {
ptr_vector<expr> concats;
get_concat(n->get_owner(), concats);
context& ctx = get_context();
sort* srt = m.get_sort(n->get_owner());
get_concat(e, concats);
sort* srt = m.get_sort(e);
seq_value_proc* sv = alloc(seq_value_proc, *this, srt);
TRACE("seq", tout << mk_pp(e, m) << "\n";);
for (unsigned i = 0; i < concats.size(); ++i) {
expr* c = concats[i], *c1;
TRACE("seq", tout << mk_pp(c, m) << "\n";);
if (m_util.str.is_unit(c, c1)) {
if (ctx.e_internalized(c1)) {
sv->add_dependency(ctx.get_enode(c1));
@ -2560,7 +2574,7 @@ model_value_proc * theory_seq::mk_value(enode * n, model_generator & mg) {
return sv;
}
else {
return alloc(expr_wrapper_proc, mk_value(n->get_owner()));
return alloc(expr_wrapper_proc, mk_value(e));
}
}
@ -2683,6 +2697,15 @@ expr_ref theory_seq::expand(expr* e0, dependency*& eqs) {
result = m_util.str.mk_index(expand(e1, deps), expand(e2, deps), e3);
}
else if (m.is_ite(e, e1, e2, e3)) {
if (ctx.e_internalized(e) && ctx.e_internalized(e2) && ctx.get_enode(e)->get_root() == ctx.get_enode(e2)->get_root()) {
result = expand(e2, deps);
add_dependency(deps, ctx.get_enode(e), ctx.get_enode(e2));
}
else if (ctx.e_internalized(e) && ctx.e_internalized(e2) && ctx.get_enode(e)->get_root() == ctx.get_enode(e3)->get_root()) {
result = expand(e3, deps);
add_dependency(deps, ctx.get_enode(e), ctx.get_enode(e3));
}
else {
literal lit(mk_literal(e1));
#if 0
expr_ref sk_ite = mk_sk_ite(e1, e2, e3);
@ -2708,6 +2731,7 @@ expr_ref theory_seq::expand(expr* e0, dependency*& eqs) {
break;
}
#endif
}
}
else if (m_util.str.is_itos(e, e1)) {
rational val;