mirrors/z3
3
0
Fork 0
mirror of https://github.com/Z3Prover/z3 synced 2025-04-24 09:35:32 +00:00
Code Activity

fix fourth bug produced by repros by Mark Dunlop

Browse source 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2019-01-27 18:11:18 -08:00
parent 1297eeb817
commit 94dae2da3a
6 changed files with 36 additions and 20 deletions
Download patch file Download diff file Expand all files Collapse all files

4
src/smt/smt_conflict_resolution.cpp
View file

@ -1372,7 +1372,7 @@ namespace smt {
}
while (true) {
TRACE("unsat_core_bug", tout << consequent << " js.get_kind(): " << js.get_kind() << ", idx: " << idx << "\n";);
TRACE("unsat_core_bug", tout << consequent << ", idx: " << idx << " " << js.get_kind() << "\n";);
switch (js.get_kind()) {
case b_justification::CLAUSE: {
clause * cls = js.get_clause();
@ -1417,7 +1417,7 @@ namespace smt {
}
while (idx >= 0) {
literal l = m_assigned_literals[idx];
TRACE("unsat_core_bug", tout << "l: " << l << ", get_assign_level(l): " << m_ctx.get_assign_level(l) << ", is_marked(l): " << m_ctx.is_marked(l.var()) << "\n";);
CTRACE("unsat_core_bug", m_ctx.is_marked(l.var()), tout << "l: " << l << ", get_assign_level(l): " << m_ctx.get_assign_level(l) << "\n";);
if (m_ctx.get_assign_level(l) < search_lvl)
goto end_unsat_core;
if (m_ctx.is_marked(l.var()))

2
src/smt/smt_context.h
View file

@ -1358,7 +1358,7 @@ namespace smt {
void display_profile(std::ostream & out) const;
void display(std::ostream& out, b_justification j) const;
std::ostream& display(std::ostream& out, b_justification j) const;
// -----------------------------------
//

15
src/smt/smt_context_pp.cpp
View file

@ -356,9 +356,9 @@ namespace smt {
}
void context::display_unsat_core(std::ostream & out) const {
unsigned sz = m_unsat_core.size();
for (unsigned i = 0; i < sz; i++)
out << mk_pp(m_unsat_core.get(i), m_manager) << "\n";
for (expr* c : m_unsat_core) {
out << mk_pp(c, m_manager) << "\n";
}
}
void context::collect_statistics(::statistics & st) const {
@ -563,13 +563,14 @@ namespace smt {
}
out << "\n";
if (is_app(n)) {
for (unsigned i = 0; i < to_app(n)->get_num_args(); i++)
todo.push_back(to_app(n)->get_arg(i));
for (expr* arg : *to_app(n)) {
todo.push_back(arg);
}
}
}
}
void context::display(std::ostream& out, b_justification j) const {
std::ostream& context::display(std::ostream& out, b_justification j) const {
switch (j.get_kind()) {
case b_justification::AXIOM:
out << "axiom";
@ -593,7 +594,7 @@ namespace smt {
UNREACHABLE();
break;
}
out << "\n";
return out << "\n";
}
void context::trace_assign(literal l, b_justification j, bool decision) const {

2
src/smt/theory_pb.cpp
View file

@ -1924,6 +1924,7 @@ namespace smt {
process_antecedent(~js.get_literal(), offset);
break;
case b_justification::AXIOM:
bound = 0;
break;
case b_justification::JUSTIFICATION: {
justification* j = js.get_justification();
@ -1934,6 +1935,7 @@ namespace smt {
}
if (pbj == nullptr) {
TRACE("pb", tout << "skip justification for " << conseq << "\n";);
bound = 0;
// this is possible when conseq is an assumption.
// The justification of conseq is itself,
// don't increment the cofficient here because it assumes

15
src/smt/theory_seq.cpp
View file

@ -2905,17 +2905,26 @@ bool theory_seq::get_length(expr* e, expr_ref& len, literal_vector& lits) {
TRACE("seq", ctx.display_literals_verbose(tout, 2, _lits); tout << "\n";);
}
else if (is_skolem(m_tail, e)) {
// e = tail(s, l), len(s) > l =>
// len(tail(s, l)) = len(s) - l - 1
// e = tail(s, l), len(s) > l => len(tail(s, l)) = len(s) - l - 1
// e = tail(s, l), len(s) <= l => len(tail(s, l)) = 0
s = to_app(e)->get_arg(0);
l = to_app(e)->get_arg(1);
expr_ref len_s = mk_len(s);
literal len_s_gt_l = mk_simplified_literal(m_autil.mk_ge(mk_sub(len_s, l), m_autil.mk_int(1)));
if (ctx.get_assignment(len_s_gt_l) == l_true) {
switch (ctx.get_assignment(len_s_gt_l)) {
case l_true:
len = mk_sub(len_s, mk_sub(l, m_autil.mk_int(1)));
TRACE("seq", tout << len_s << " " << len << " " << len_s_gt_l << "\n";);
lits.push_back(len_s_gt_l);
return true;
case l_false:
len = m_autil.mk_int(0);
TRACE("seq", tout << len_s << " " << len << " " << len_s_gt_l << "\n";);
lits.push_back(~len_s_gt_l);
return true;
default:
break;
}
}
else if (m_util.str.is_unit(e)) {