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arrays (#4684)

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* arrays

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* arrays

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* na

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* arrays

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* na

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* fill

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* update drat and fix euf bugs

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* na

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* na

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* na

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* const qualifiers

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* na

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* reorg ba

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* reorg

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* build warnings

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2020-09-13 19:29:59 -07:00 • committed by GitHub
parent d56dd1db7b
commit 796e2fd9eb
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79 changed files with 2571 additions and 1850 deletions
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71
src/sat/smt/array_model.cpp
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@ -53,7 +53,7 @@ namespace array {
mdl.register_decl(f, fi);
for (euf::enode* p : euf::enode_parents(n)) {
if (!a.is_select(p->get_expr()))
if (!a.is_select(p->get_expr()) || p->get_arg(0)->get_root() != n->get_root())
continue;
args.reset();
for (unsigned i = 1; i < p->num_args(); ++i)
@ -74,4 +74,73 @@ namespace array {
values.set(n->get_root_id(), m.mk_app(get_id(), OP_AS_ARRAY, 1, &p));
}
bool solver::have_different_model_values(theory_var v1, theory_var v2) {
euf::enode* else1 = nullptr, * else2 = nullptr;
euf::enode* n1 = var2enode(v1), *n2 = var2enode(v2);
euf::enode* r1 = n1->get_root(), * r2 = n2->get_root();
expr* e1 = n1->get_expr();
expr* e;
if (!a.is_array(e1))
return true;
auto find_else = [&](theory_var v, euf::enode* r) {
var_data& d = get_var_data(find(v));
for (euf::enode* c : d.m_lambdas)
if (a.is_const(c->get_expr(), e))
return expr2enode(e)->get_root();
for (euf::enode* p : euf::enode_parents(r))
for (euf::enode* pe : euf::enode_class(p))
if (a.is_default(pe->get_expr()))
return pe->get_root();
return (euf::enode*)nullptr;
};
else1 = find_else(v1, r1);
else2 = find_else(v2, r2);
if (else1 && else2 && else1->get_root() != else2->get_root() && has_large_domain(e1))
return true;
struct eq {
solver& s;
eq(solver& s) :s(s) {}
bool operator()(euf::enode* n1, euf::enode* n2) const {
SASSERT(s.a.is_select(n1->get_expr()));
SASSERT(s.a.is_select(n2->get_expr()));
for (unsigned i = n1->num_args(); i-- > 1; )
if (n1->get_arg(i)->get_root() != n2->get_arg(i)->get_root())
return false;
return true;
}
};
struct hash {
solver& s;
hash(solver& s) :s(s) {}
unsigned operator()(euf::enode* n) const {
SASSERT(s.a.is_select(n->get_expr()));
unsigned h = 33;
for (unsigned i = n->num_args(); i-- > 1; )
h = hash_u_u(h, n->get_arg(i)->get_root_id());
return h;
}
};
eq eq_proc(*this);
hash hash_proc(*this);
hashtable<euf::enode*, hash, eq> table(DEFAULT_HASHTABLE_INITIAL_CAPACITY, hash_proc, eq_proc);
euf::enode* p2 = nullptr;
auto maps_diff = [&](euf::enode* p, euf::enode* else_, euf::enode* r) {
return table.find(p, p2) ? p2->get_root() != r : (else_ && else_ != r);
};
auto table_diff = [&](euf::enode* r1, euf::enode* r2, euf::enode* else1) {
table.reset();
for (euf::enode* p : euf::enode_parents(r1))
if (a.is_select(p->get_expr()) && r1 == p->get_arg(0)->get_root())
table.insert(p);
for (euf::enode* p : euf::enode_parents(r2))
if (a.is_select(p->get_expr()) && r2 == p->get_arg(0)->get_root())
if (maps_diff(p, else1, p->get_root()))
return true;
return false;
};
return table_diff(r1, r2, else1) || table_diff(r2, r1, else2);
}
}