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Merge branch 'master' of https://github.com/z3prover/z3

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This commit is contained in:
Nikolaj Bjorner 2021-09-02 08:53:56 -07:00
parent 02acc38c28 e05ef8ece9
commit edb26e7be7
15 changed files with 63 additions and 37 deletions
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1
src/api/c++/z3++.h
View file

@ -599,6 +599,7 @@ namespace z3 {
iterator begin() const noexcept { return iterator(this, 0); }
iterator end() const { return iterator(this, size()); }
friend std::ostream & operator<<(std::ostream & out, ast_vector_tpl const & v) { out << Z3_ast_vector_to_string(v.ctx(), v); return out; }
std::string to_string() const { return std::string(Z3_ast_vector_to_string(ctx(), m_vector)); }
};

7
src/ast/rewriter/array_rewriter.cpp
View file

@ -31,7 +31,7 @@ void array_rewriter::updt_params(params_ref const & _p) {
m_expand_store_eq = p.expand_store_eq();
m_expand_nested_stores = p.expand_nested_stores();
m_blast_select_store = p.blast_select_store();
m_expand_select_ite = false;
m_expand_select_ite = p.expand_select_ite();
}
void array_rewriter::get_param_descrs(param_descrs & r) {
@ -226,8 +226,7 @@ br_status array_rewriter::mk_select_core(unsigned num_args, expr * const * args,
result = subst(q->get_expr(), _args.size(), _args.data());
inv_var_shifter invsh(m());
invsh(result, _args.size(), result);
return BR_REWRITE_FULL;
return BR_REWRITE_FULL;
}
if (m_util.is_map(args[0])) {
@ -698,7 +697,7 @@ br_status array_rewriter::mk_eq_core(expr * lhs, expr * rhs, expr_ref & result)
if (m_util.is_const(lhs, v) && m_util.is_store(rhs)) {
unsigned n = to_app(rhs)->get_num_args();
result = m().mk_and(m().mk_eq(lhs, to_app(rhs)->get_arg(0)),
m().mk_eq(v, to_app(rhs)->get_arg(n - 1)));
m().mk_eq(v, to_app(rhs)->get_arg(n - 1)));
return BR_REWRITE2;
}
if (m_util.is_const(lhs, v) && m_util.is_const(rhs, w)) {

1
src/params/array_rewriter_params.pyg
View file

@ -4,5 +4,6 @@ def_module_params(module_name='rewriter',
params=(("expand_select_store", BOOL, False, "conservatively replace a (select (store ...) ...) term by an if-then-else term"),
("blast_select_store", BOOL, False, "eagerly replace all (select (store ..) ..) term by an if-then-else term"),
("expand_nested_stores", BOOL, False, "replace nested stores by a lambda expression"),
("expand_select_ite", BOOL, False, "expand select over ite expressions"),
("expand_store_eq", BOOL, False, "reduce (store ...) = (store ...) with a common base into selects"),
("sort_store", BOOL, False, "sort nested stores when the indices are known to be different")))

5
src/sat/smt/arith_internalize.cpp
View file

@ -42,6 +42,7 @@ namespace arith {
void solver::init_internalize() {
force_push();
// initialize 0, 1 variables:
if (!m_internalize_initialized) {
get_one(true);
get_one(false);
@ -484,10 +485,10 @@ namespace arith {
return st.vars()[0];
}
else if (is_one(st) && a.is_numeral(term)) {
return get_one(a.is_int(term));
return lp().local_to_external(get_one(a.is_int(term)));
}
else if (is_zero(st) && a.is_numeral(term)) {
return get_zero(a.is_int(term));
return lp().local_to_external(get_zero(a.is_int(term)));
}
else {
init_left_side(st);

1
src/sat/smt/array_axioms.cpp
View file

@ -451,6 +451,7 @@ namespace array {
expr_ref alpha(a.mk_select(args), m);
expr_ref beta(alpha);
rewrite(beta);
TRACE("array", tout << alpha << " == " << beta << "\n";);
return ctx.propagate(e_internalize(alpha), e_internalize(beta), array_axiom());
}

4
src/sat/smt/euf_internalize.cpp
View file

@ -342,7 +342,9 @@ namespace euf {
break;
}
}
if (m.is_bool(n->get_expr()) && th_id != m.get_basic_family_id())
return true;
for (enode* parent : euf::enode_parents(n)) {
app* p = to_app(parent->get_expr());
family_id fid = p->get_family_id();

22
src/sat/smt/euf_solver.cpp
View file

@ -300,7 +300,7 @@ namespace euf {
size_t* c = to_ptr(l);
SASSERT(is_literal(c));
SASSERT(l == get_literal(c));
if (n->value_conflict()) {
if (n->value_conflict()) {
euf::enode* nb = sign ? mk_false() : mk_true();
euf::enode* r = n->get_root();
euf::enode* rb = sign ? mk_true() : mk_false();
@ -458,6 +458,8 @@ namespace euf {
give_up = true;
unsigned num_nodes = m_egraph.num_nodes();
if (merge_shared_bools())
cont = true;
for (auto* e : m_solvers) {
if (!m.inc())
return sat::check_result::CR_GIVEUP;
@ -485,6 +487,24 @@ namespace euf {
return sat::check_result::CR_DONE;
}
bool solver::merge_shared_bools() {
bool merged = false;
for (unsigned i = m_egraph.nodes().size(); i-- > 0; ) {
euf::enode* n = m_egraph.nodes()[i];
if (!is_shared(n) || !m.is_bool(n->get_expr()))
continue;
if (n->value() == l_true && !m.is_true(n->get_root()->get_expr())) {
m_egraph.merge(n, mk_true(), to_ptr(sat::literal(n->bool_var())));
merged = true;
}
if (n->value() == l_false && !m.is_false(n->get_root()->get_expr())) {
m_egraph.merge(n, mk_false(), to_ptr(~sat::literal(n->bool_var())));
merged = true;
}
}
return merged;
}
void solver::push() {
si.push();
scope s;

2
src/sat/smt/euf_solver.h
View file

@ -165,6 +165,7 @@ namespace euf {
bool is_self_propagated(th_eq const& e);
void get_antecedents(literal l, constraint& j, literal_vector& r, bool probing);
void new_diseq(enode* a, enode* b, literal lit);
bool merge_shared_bools();
// proofs
void log_antecedents(std::ostream& out, literal l, literal_vector const& r);
@ -286,6 +287,7 @@ namespace euf {
void propagate(literal lit, th_explain* p) { propagate(lit, p->to_index()); }
bool propagate(enode* a, enode* b, th_explain* p) { return propagate(a, b, p->to_index()); }
size_t* to_justification(sat::literal l) { return to_ptr(l); }
void set_conflict(th_explain* p) { set_conflict(p->to_index()); }
bool set_root(literal l, literal r) override;

20
src/sat/smt/q_eval.cpp
View file

@ -181,23 +181,25 @@ namespace q {
while (!todo.empty()) {
expr* t = todo.back();
SASSERT(!is_ground(t) || ctx.get_egraph().find(t));
if (is_ground(t) || (has_quantifiers(t) && !has_free_vars(t))) {
m_mark.mark(t);
m_eval.setx(t->get_id(), ctx.get_egraph().find(t), nullptr);
if (!m_eval[t->get_id()])
return nullptr;
todo.pop_back();
continue;
}
if (m_mark.is_marked(t)) {
todo.pop_back();
continue;
}
if (is_var(t)) {
if (is_ground(t) || (has_quantifiers(t) && !has_free_vars(t))) {
m_eval.setx(t->get_id(), ctx.get_egraph().find(t), nullptr);
if (!m_eval[t->get_id()])
return nullptr;
m_mark.mark(t);
todo.pop_back();
continue;
}
if (is_var(t)) {
if (to_var(t)->get_idx() >= n)
return nullptr;
m_eval.setx(t->get_id(), binding[n - 1 - to_var(t)->get_idx()], nullptr);
if (!m_eval[t->get_id()])
return nullptr;
m_mark.mark(t);
todo.pop_back();
continue;
}

2
src/sat/smt/q_mam.cpp
View file

@ -3745,7 +3745,7 @@ namespace q {
// However, the simplifier may turn a non-ground pattern into a ground one.
// So, we should check it again here.
for (expr* arg : *mp)
if (is_ground(arg))
if (is_ground(arg) || has_quantifiers(arg))
return; // ignore multi-pattern containing ground pattern.
update_filters(qa, mp);
m_new_patterns.push_back(qp_pair(qa, mp));

16
src/sat/tactic/goal2sat.cpp
View file

@ -251,7 +251,7 @@ struct goal2sat::imp : public sat::sat_internalizer {
return;
}
n -= m_num_scopes;
m_num_scopes = 0;
m_num_scopes = 0;
m_map.pop(n);
unsigned k = m_cache_lim[m_cache_lim.size() - n];
for (unsigned i = m_cache_trail.size(); i-- > k; ) {
@ -284,7 +284,7 @@ struct goal2sat::imp : public sat::sat_internalizer {
m_cache_trail.push_back(t);
}
void convert_atom(expr * t, bool root, bool sign) {
void convert_atom(expr * t, bool root, bool sign) {
SASSERT(m.is_bool(t));
sat::literal l;
sat::bool_var v = m_map.to_bool_var(t);
@ -954,9 +954,11 @@ struct goal2sat::imp : public sat::sat_internalizer {
}
void user_push() {
push();
}
void user_pop(unsigned n) {
pop(n);
}
};
@ -1010,15 +1012,7 @@ void goal2sat::operator()(goal const & g, params_ref const & p, sat::solver_core
for (unsigned i = 0; i < m_scopes; ++i)
m_imp->user_push();
}
(*m_imp)(g);
if (!t.get_extension() && m_imp->interpreted_funs().empty()) {
dealloc(m_imp);
m_imp = nullptr;
}
else
m_scopes = 0;
(*m_imp)(g);
}
void goal2sat::get_interpreted_funs(func_decl_ref_vector& funs) {

4
src/smt/smt_context_inv.cpp
View file

@ -371,7 +371,7 @@ namespace smt {
case l_true:
if (!m_proto_model->eval(n, res, false))
return true;
CTRACE("model", !m.is_true(res), tout << n << " evaluates to " << res << "\n";);
CTRACE("model", !m.is_true(res), tout << n << " evaluates to " << res << "\n" << *m_proto_model << "\n";);
if (m.is_false(res)) {
return false;
}
@ -379,7 +379,7 @@ namespace smt {
case l_false:
if (!m_proto_model->eval(n, res, false))
return true;
CTRACE("model", !m.is_false(res), tout << n << " evaluates to " << res << "\n";);
CTRACE("model", !m.is_false(res), tout << n << " evaluates to " << res << "\n" << *m_proto_model << "\n";);
if (m.is_true(res)) {
return false;
}

4
src/smt/theory_lra.cpp
View file

@ -807,10 +807,10 @@ class theory_lra::imp {
return st.vars()[0];
}
else if (is_one(st) && a.is_numeral(term)) {
return get_one(a.is_int(term));
return lp().local_to_external(get_one(a.is_int(term)));
}
else if (is_zero(st) && a.is_numeral(term)) {
return get_zero(a.is_int(term));
return lp().local_to_external(get_zero(a.is_int(term)));
}
else {
init_left_side(st);

9
src/solver/assertions/asserted_formulas.cpp
View file

@ -532,14 +532,14 @@ void asserted_formulas::propagate_values() {
flush_cache();
unsigned num_prop = 0;
unsigned delta_prop = m_formulas.size();
while (!inconsistent() && m_formulas.size()/20 < delta_prop) {
unsigned sz = m_formulas.size();
unsigned delta_prop = sz;
while (!inconsistent() && sz/20 < delta_prop) {
m_expr2depth.reset();
m_scoped_substitution.push();
unsigned prop = num_prop;
TRACE("propagate_values", display(tout << "before:\n"););
unsigned i = m_qhead;
unsigned sz = m_formulas.size();
for (; i < sz; i++) {
prop += propagate_values(i);
}
@ -558,6 +558,9 @@ void asserted_formulas::propagate_values() {
TRACE("propagate_values", tout << "after:\n"; display(tout););
delta_prop = prop - num_prop;
num_prop = prop;
if (sz <= m_formulas.size())
break;
sz = m_formulas.size();
}
TRACE("asserted_formulas", tout << num_prop << "\n";);
if (num_prop > 0)

2
src/tactic/portfolio/solver_subsumption_tactic.h
View file

@ -19,7 +19,7 @@ class tactic;
tactic * mk_solver_subsumption_tactic(ast_manager & m, params_ref const & p = params_ref());
/*
ADD_TACTIC("solver_subsumption", "remove assertions that are subsumed.", "mk_solver_subsumption_tactic(m, p)")
ADD_TACTIC("solver-subsumption", "remove assertions that are subsumed.", "mk_solver_subsumption_tactic(m, p)")
*/