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have quantifier equality take names into account

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2017-10-07 00:07:53 +01:00
parent 31c6b3eb5b
commit a18236bc7f
6 changed files with 78 additions and 14 deletions
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3
src/ast/ast.cpp
View file

@ -471,6 +471,9 @@ bool compare_nodes(ast const * n1, ast const * n2) {
compare_arrays(to_quantifier(n1)->get_decl_sorts(),
to_quantifier(n2)->get_decl_sorts(),
to_quantifier(n1)->get_num_decls()) &&
compare_arrays(to_quantifier(n1)->get_decl_names(),
to_quantifier(n2)->get_decl_names(),
to_quantifier(n1)->get_num_decls()) &&
to_quantifier(n1)->get_expr() == to_quantifier(n2)->get_expr() &&
to_quantifier(n1)->get_weight() == to_quantifier(n2)->get_weight() &&
to_quantifier(n1)->get_num_patterns() == to_quantifier(n2)->get_num_patterns() &&

9
src/ast/expr_abstract.cpp
View file

@ -19,6 +19,7 @@ Notes:
#include "ast/expr_abstract.h"
#include "util/map.h"
#include "ast/ast_pp.h"
void expr_abstractor::operator()(unsigned base, unsigned num_bound, expr* const* bound, expr* n, expr_ref& result) {
@ -109,6 +110,9 @@ void expr_abstractor::operator()(unsigned base, unsigned num_bound, expr* const*
void expr_abstract(ast_manager& m, unsigned base, unsigned num_bound, expr* const* bound, expr* n, expr_ref& result) {
expr_abstractor abs(m);
abs(base, num_bound, bound, n, result);
TRACE("expr_abstract",
tout << expr_ref(n, m) << "\n";
tout << result << "\n";);
}
expr_ref mk_quantifier(bool is_forall, ast_manager& m, unsigned num_bound, app* const* bound, expr* n) {
@ -123,6 +127,11 @@ expr_ref mk_quantifier(bool is_forall, ast_manager& m, unsigned num_bound, app*
}
result = m.mk_quantifier(is_forall, num_bound, sorts.c_ptr(), names.c_ptr(), result);
}
TRACE("expr_abstract",
tout << expr_ref(n, m) << "\n";
for (unsigned i = 0; i < num_bound; ++i) tout << expr_ref(bound[i], m) << " ";
tout << "\n";
tout << result << "\n";);
return result;
}

7
src/ast/expr_substitution.cpp
View file

@ -56,6 +56,13 @@ expr_substitution::~expr_substitution() {
reset();
}
std::ostream& expr_substitution::display(std::ostream& out) {
for (auto & kv : m_subst) {
out << expr_ref(kv.m_key, m()) << " |-> " << expr_ref(kv.m_value, m()) << "\n";
}
return out;
}
void expr_substitution::insert(expr * c, expr * def, proof * def_pr, expr_dependency * def_dep) {
obj_map<expr, expr*>::obj_map_entry * entry = m_subst.insert_if_not_there2(c, 0);
if (entry->get_data().m_value == 0) {

3
src/ast/expr_substitution.h
View file

@ -50,6 +50,8 @@ public:
bool contains(expr * s);
void reset();
void cleanup();
std::ostream& display(std::ostream& out);
};
class scoped_expr_substitution {
@ -84,6 +86,7 @@ public:
bool find(expr * s, expr * & def, proof * & def_pr, expr_dependency * & def_dep) { return m_subst.find(s, def, def_pr, def_dep); }
bool contains(expr * s) { return m_subst.contains(s); }
void cleanup() { m_subst.cleanup(); }
std::ostream& display(std::ostream& out) { return m_subst.display(out); }
};
#endif

65
src/tactic/core/dom_simplify_tactic.cpp
View file

@ -91,23 +91,42 @@ bool expr_dominators::compute_dominators() {
unsigned iterations = 1;
while (change) {
change = false;
TRACE("simplify",
for (auto & kv : m_doms) {
tout << expr_ref(kv.m_key, m) << " |-> " << expr_ref(kv.m_value, m) << "\n";
});
SASSERT(m_post2expr.empty() || m_post2expr.back() == e);
for (unsigned i = 0; i + 1 < m_post2expr.size(); ++i) {
expr * child = m_post2expr[i];
ptr_vector<expr> const& p = m_parents[child];
SASSERT(!p.empty());
expr * new_idom = 0, *idom2 = 0;
for (unsigned j = 0; j < p.size(); ++j) {
if (!new_idom) {
m_doms.find(p[j], new_idom);
}
else if (m_doms.find(p[j], idom2)) {
new_idom = intersect(new_idom, idom2);
}
if (p.size() == 1) {
if (!m_doms.contains(child)) {
m_doms.insert(child, p[0]);
change = true;
}
}
if (new_idom && (!m_doms.find(child, idom2) || idom2 != new_idom)) {
m_doms.insert(child, new_idom);
change = true;
else {
expr * new_idom = 0, *idom2 = 0;
for (unsigned j = 0; j < p.size(); ++j) {
if (!new_idom) {
m_doms.find(p[j], new_idom);
}
else if (m_doms.find(p[j], idom2)) {
new_idom = intersect(new_idom, idom2);
}
}
if (!new_idom) {
m_doms.insert(child, p[0]);
TRACE("simplify", tout << expr_ref(child, m) << " |-> " << expr_ref(p[0], m) << "\n";);
change = true;
}
else if (!m_doms.find(child, idom2) || idom2 != new_idom) {
m_doms.insert(child, new_idom);
TRACE("simplify", tout << expr_ref(child, m) << " |-> " << expr_ref(new_idom, m) << "\n";);
change = true;
}
}
}
iterations *= 2;
@ -130,6 +149,7 @@ bool expr_dominators::compile(expr * e) {
compute_post_order();
if (!compute_dominators()) return false;
extract_tree();
TRACE("simplify", display(tout););
return true;
}
@ -147,6 +167,22 @@ void expr_dominators::reset() {
m_root.reset();
}
std::ostream& expr_dominators::display(std::ostream& out) {
return display(out, 0, m_root);
}
std::ostream& expr_dominators::display(std::ostream& out, unsigned indent, expr* r) {
for (unsigned i = 0; i < indent; ++i) out << " ";
out << expr_ref(r, m);
if (m_tree.contains(r)) {
for (expr* child : m_tree[r]) {
if (child != r)
display(out, indent + 1, child);
}
}
out << "\n";
return out;
}
// -----------------------
@ -200,7 +236,6 @@ expr_ref dom_simplify_tactic::simplify_ite(app * ite) {
simplify(child);
}
}
pop(scope_level() - old_lvl);
expr_ref new_t = simplify(t);
if (!assert_expr(new_c, true)) {
@ -230,6 +265,8 @@ expr_ref dom_simplify_tactic::simplify_ite(app * ite) {
expr_ref dom_simplify_tactic::simplify(expr * e0) {
expr_ref r(m);
expr* e = 0;
TRACE("simplify", tout << "depth: " << m_depth << " " << mk_pp(e0, m) << " -> " << r << "\n";);
if (!m_result.find(e0, e)) {
e = e0;
}
@ -254,7 +291,9 @@ expr_ref dom_simplify_tactic::simplify(expr * e0) {
if (is_app(e)) {
m_args.reset();
for (expr* arg : *to_app(e)) {
m_args.push_back(get_cached(arg)); // TBD is cache really applied to all sub-terms?
r = get_cached(arg);
(*m_simplifier)(r);
m_args.push_back(r);
}
r = m.mk_app(to_app(e)->get_decl(), m_args.size(), m_args.c_ptr());
}

5
src/tactic/core/dom_simplify_tactic.h
View file

@ -48,6 +48,8 @@ private:
bool compute_dominators();
void extract_tree();
std::ostream& display(std::ostream& out, unsigned indent, expr* r);
public:
expr_dominators(ast_manager& m): m(m), m_root(m) {}
@ -55,7 +57,8 @@ public:
bool compile(unsigned sz, expr * const* es);
tree_t const& get_tree() { return m_tree; }
void reset();
std::ostream& display(std::ostream& out);
};
class dom_simplifier {