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Merge pull request #1222 from NikolajBjorner/master

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bug fixes and revision of proto_model
This commit is contained in:
Nikolaj Bjorner 2017-08-21 17:19:27 -07:00 • committed by GitHub
commit 26afdd92c9
15 changed files with 313 additions and 714 deletions
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4
src/ast/array_decl_plugin.cpp
View file

@ -556,9 +556,9 @@ bool array_decl_plugin::is_fully_interp(sort const * s) const {
return m_manager->is_fully_interp(get_array_range(s));
}
func_decl * array_recognizers::get_as_array_func_decl(app * n) const {
func_decl * array_recognizers::get_as_array_func_decl(expr * n) const {
SASSERT(is_as_array(n));
return to_func_decl(n->get_decl()->get_parameter(0).get_ast());
return to_func_decl(to_app(n)->get_decl()->get_parameter(0).get_ast());
}
array_util::array_util(ast_manager& m):

2
src/ast/array_decl_plugin.h
View file

@ -148,7 +148,7 @@ public:
bool is_const(func_decl* f) const { return is_decl_of(f, m_fid, OP_CONST_ARRAY); }
bool is_map(func_decl* f) const { return is_decl_of(f, m_fid, OP_ARRAY_MAP); }
bool is_as_array(func_decl* f) const { return is_decl_of(f, m_fid, OP_AS_ARRAY); }
func_decl * get_as_array_func_decl(app * n) const;
func_decl * get_as_array_func_decl(expr * n) const;
};
class array_util : public array_recognizers {

10
src/ast/rewriter/seq_rewriter.cpp
View file

@ -864,11 +864,11 @@ br_status seq_rewriter::mk_seq_prefix(expr* a, expr* b, expr_ref& result) {
expr_ref_vector as(m()), bs(m());
if (a1 != b1 && isc1 && isc2) {
TRACE("seq", tout << s1 << " " << s2 << "\n";);
if (s1.length() <= s2.length()) {
if (s1.prefixof(s2)) {
if (a == a1) {
result = m().mk_true();
TRACE("seq", tout << s1 << " " << s2 << " " << result << "\n";);
return BR_DONE;
}
m_util.str.get_concat(a, as);
@ -878,10 +878,12 @@ br_status seq_rewriter::mk_seq_prefix(expr* a, expr* b, expr_ref& result) {
bs[0] = m_util.str.mk_string(s2);
result = m_util.str.mk_prefix(m_util.str.mk_concat(as.size()-1, as.c_ptr()+1),
m_util.str.mk_concat(bs.size(), bs.c_ptr()));
TRACE("seq", tout << s1 << " " << s2 << " " << result << "\n";);
return BR_REWRITE_FULL;
}
else {
result = m().mk_false();
TRACE("seq", tout << s1 << " " << s2 << " " << result << "\n";);
return BR_DONE;
}
}
@ -889,6 +891,7 @@ br_status seq_rewriter::mk_seq_prefix(expr* a, expr* b, expr_ref& result) {
if (s2.prefixof(s1)) {
if (b == b1) {
result = m().mk_false();
TRACE("seq", tout << s1 << " " << s2 << " " << result << "\n";);
return BR_DONE;
}
m_util.str.get_concat(a, as);
@ -898,10 +901,12 @@ br_status seq_rewriter::mk_seq_prefix(expr* a, expr* b, expr_ref& result) {
as[0] = m_util.str.mk_string(s1);
result = m_util.str.mk_prefix(m_util.str.mk_concat(as.size(), as.c_ptr()),
m_util.str.mk_concat(bs.size()-1, bs.c_ptr()+1));
TRACE("seq", tout << s1 << " " << s2 << " " << result << "\n";);
return BR_REWRITE_FULL;
}
else {
result = m().mk_false();
TRACE("seq", tout << s1 << " " << s2 << " " << result << "\n";);
return BR_DONE;
}
}
@ -930,9 +935,6 @@ br_status seq_rewriter::mk_seq_prefix(expr* a, expr* b, expr_ref& result) {
if (i == as.size()) {
result = mk_and(eqs);
TRACE("seq", tout << result << "\n";);
if (m().is_true(result)) {
return BR_DONE;
}
return BR_REWRITE3;
}
SASSERT(i < as.size());

6
src/model/model_core.cpp
View file

@ -90,11 +90,11 @@ void model_core::register_decl(func_decl * d, func_interp * fi) {
void model_core::unregister_decl(func_decl * d) {
decl2expr::obj_map_entry * ec = m_interp.find_core(d);
if (ec && ec->get_data().m_value != 0) {
m_manager.dec_ref(ec->get_data().m_key);
m_manager.dec_ref(ec->get_data().m_value);
m_manager.dec_ref(ec->get_data().m_key);
m_manager.dec_ref(ec->get_data().m_value);
m_interp.remove(d);
m_const_decls.erase(d);
return;
return;
}
decl2finterp::obj_map_entry * ef = m_finterp.find_core(d);

2
src/muz/spacer/spacer_generalizers.cpp
View file

@ -133,7 +133,7 @@ void unsat_core_generalizer::operator()(lemma_ref &lemma)
unsigned uses_level;
expr_ref_vector core(m);
VERIFY(pt.is_invariant(lemma->level(), lemma->get_expr(), uses_level, &core));
VERIFY(pt.is_invariant(old_level, lemma->get_expr(), uses_level, &core));
CTRACE("spacer", old_sz > core.size(),
tout << "unsat core reduced lemma from: "

2
src/muz/spacer/spacer_qe_project.cpp
View file

@ -98,7 +98,7 @@ peq::peq (app* p, ast_manager& m):
m_eq (m),
m_arr_u (m)
{
SASSERT (is_partial_eq (p));
VERIFY (is_partial_eq (p));
SASSERT (m_arr_u.is_array (m_lhs) &&
m_arr_u.is_array (m_rhs) &&
m_eq_proc (m.get_sort (m_lhs), m.get_sort (m_rhs)));

3
src/smt/mam.cpp
View file

@ -2080,16 +2080,15 @@ namespace smt {
*/
enode_vector * interpreter::mk_depth1_vector(enode * n, func_decl * f, unsigned i) {
enode_vector * v = mk_enode_vector();
unsigned num_args = n->get_num_args();
n = n->get_root();
enode_vector::const_iterator it = n->begin_parents();
enode_vector::const_iterator end = n->end_parents();
for (; it != end; ++it) {
enode * p = *it;
if (p->get_decl() == f &&
i < p->get_num_args() &&
m_context.is_relevant(p) &&
p->is_cgr() &&
i < p->get_num_args() &&
p->get_arg(i)->get_root() == n) {
v->push_back(p);
}

16
src/smt/proto_model/datatype_factory.cpp
View file

@ -19,7 +19,6 @@ Revision History:
#include "smt/proto_model/datatype_factory.h"
#include "smt/proto_model/proto_model.h"
#include "ast/ast_pp.h"
#include "ast/ast_ll_pp.h"
#include "ast/expr_functors.h"
datatype_factory::datatype_factory(ast_manager & m, proto_model & md):
@ -90,10 +89,7 @@ expr * datatype_factory::get_almost_fresh_value(sort * s) {
// If the argumet is a sibling datatype of s, then
// use get_last_fresh_value.
ptr_vector<func_decl> const * constructors = m_util.get_datatype_constructors(s);
ptr_vector<func_decl>::const_iterator it = constructors->begin();
ptr_vector<func_decl>::const_iterator end = constructors->end();
for (; it != end; ++it) {
func_decl * constructor = *it;
for (func_decl * constructor : *constructors) {
expr_ref_vector args(m_manager);
bool found_fresh_arg = false;
bool recursive = false;
@ -156,10 +152,7 @@ expr * datatype_factory::get_fresh_value(sort * s) {
// arguments (if the argument is not a sibling datatype of s).
// Two datatypes are siblings if they were defined together in the same mutually recursive definition.
ptr_vector<func_decl> const * constructors = m_util.get_datatype_constructors(s);
ptr_vector<func_decl>::const_iterator it = constructors->begin();
ptr_vector<func_decl>::const_iterator end = constructors->end();
for (; it != end; ++it) {
func_decl * constructor = *it;
for (func_decl * constructor : *constructors) {
expr_ref_vector args(m_manager);
bool found_fresh_arg = false;
unsigned num = constructor->get_arity();
@ -197,10 +190,7 @@ expr * datatype_factory::get_fresh_value(sort * s) {
++num_iterations;
TRACE("datatype_factory", tout << mk_pp(get_last_fresh_value(s), m_manager) << "\n";);
ptr_vector<func_decl> const * constructors = m_util.get_datatype_constructors(s);
ptr_vector<func_decl>::const_iterator it = constructors->begin();
ptr_vector<func_decl>::const_iterator end = constructors->end();
for (; it != end; ++it) {
func_decl * constructor = *it;
for (func_decl * constructor : *constructors) {
expr_ref_vector args(m_manager);
bool found_sibling = false;
unsigned num = constructor->get_arity();

340
src/smt/proto_model/proto_model.cpp
View file

@ -10,41 +10,40 @@ Abstract:
<abstract>
Author:
Leonardo de Moura (leonardo) 2007-03-08.
Revision History:
--*/
#include "smt/proto_model/proto_model.h"
#include "model/model_params.hpp"
#include "ast/ast_pp.h"
#include "ast/ast_ll_pp.h"
#include "ast/rewriter/var_subst.h"
#include "ast/array_decl_plugin.h"
#include "ast/well_sorted.h"
#include "ast/used_symbols.h"
#include "model/model_params.hpp"
#include "model/model_v2_pp.h"
#include "smt/proto_model/proto_model.h"
proto_model::proto_model(ast_manager & m, params_ref const & p):
model_core(m),
m_afid(m.mk_family_id(symbol("array"))),
m_eval(*this),
m_rewrite(m) {
register_factory(alloc(basic_factory, m));
m_user_sort_factory = alloc(user_sort_factory, m);
register_factory(m_user_sort_factory);
m_model_partial = model_params(p).partial();
}
void proto_model::register_aux_decl(func_decl * d, func_interp * fi) {
model_core::register_decl(d, fi);
m_aux_decls.insert(d);
}
void proto_model::register_aux_decl(func_decl * d) {
m_aux_decls.insert(d);
}
/**
\brief Set new_fi as the new interpretation for f.
If f_aux != 0, then assign the old interpretation of f to f_aux.
@ -84,21 +83,11 @@ expr * proto_model::mk_some_interp_for(func_decl * d) {
}
bool proto_model::is_select_of_model_value(expr* e) const {
return
is_app_of(e, m_afid, OP_SELECT) &&
is_as_array(to_app(e)->get_arg(0)) &&
has_interpretation(array_util(m_manager).get_as_array_func_decl(to_app(to_app(e)->get_arg(0))));
}
bool proto_model::eval(expr * e, expr_ref & result, bool model_completion) {
m_eval.set_model_completion(model_completion);
m_eval.set_expand_array_equalities(false);
try {
m_eval(e, result);
#if 0
std::cout << mk_pp(e, m_manager) << "\n===>\n" << result << "\n";
#endif
return true;
}
catch (model_evaluator_exception & ex) {
@ -158,12 +147,11 @@ void proto_model::cleanup_func_interp(func_interp * fi, func_decl_set & found_au
app * t = to_app(a);
bool visited = true;
args.reset();
unsigned num_args = t->get_num_args();
for (unsigned i = 0; i < num_args; ++i) {
for (expr* t_arg : *t) {
expr * arg = 0;
if (!cache.find(t->get_arg(i), arg)) {
if (!cache.find(t_arg, arg)) {
visited = false;
todo.push_back(t->get_arg(i));
todo.push_back(t_arg);
}
else {
args.push_back(arg);
@ -176,7 +164,7 @@ void proto_model::cleanup_func_interp(func_interp * fi, func_decl_set & found_au
if (m_aux_decls.contains(f))
found_aux_fs.insert(f);
expr_ref new_t(m_manager);
new_t = m_rewrite.mk_app(f, num_args, args.c_ptr());
new_t = m_rewrite.mk_app(f, args.size(), args.c_ptr());
if (t != new_t.get())
trail.push_back(new_t);
todo.pop_back();
@ -220,10 +208,8 @@ void proto_model::remove_aux_decls_not_in_set(ptr_vector<func_decl> & decls, fun
*/
void proto_model::cleanup() {
func_decl_set found_aux_fs;
decl2finterp::iterator it = m_finterp.begin();
decl2finterp::iterator end = m_finterp.end();
for (; it != end; ++it) {
func_interp * fi = (*it).m_value;
for (auto const& kv : m_finterp) {
func_interp * fi = kv.m_value;
cleanup_func_interp(fi, found_aux_fs);
}
@ -232,18 +218,10 @@ void proto_model::cleanup() {
remove_aux_decls_not_in_set(m_decls, found_aux_fs);
remove_aux_decls_not_in_set(m_func_decls, found_aux_fs);
func_decl_set::iterator it2 = m_aux_decls.begin();
func_decl_set::iterator end2 = m_aux_decls.end();
for (; it2 != end2; ++it2) {
func_decl * faux = *it2;
for (func_decl* faux : m_aux_decls) {
if (!found_aux_fs.contains(faux)) {
TRACE("cleanup_bug", tout << "eliminating " << faux->get_name() << "\n";);
func_interp * fi = 0;
m_finterp.find(faux, fi);
SASSERT(fi != 0);
m_finterp.erase(faux);
m_manager.dec_ref(faux);
dealloc(fi);
unregister_decl(faux);
}
}
m_aux_decls.swap(found_aux_fs);
@ -270,10 +248,9 @@ ptr_vector<expr> const & proto_model::get_universe(sort * s) const {
ptr_vector<expr> & tmp = const_cast<proto_model*>(this)->m_tmp;
tmp.reset();
obj_hashtable<expr> const & u = get_known_universe(s);
obj_hashtable<expr>::iterator it = u.begin();
obj_hashtable<expr>::iterator end = u.end();
for (; it != end; ++it)
tmp.push_back(*it);
for (expr * e : u) {
tmp.push_back(e);
}
return tmp;
}
@ -351,15 +328,8 @@ void proto_model::register_value(expr * n) {
}
}
bool proto_model::is_as_array(expr * v) const {
return is_app_of(v, m_afid, OP_AS_ARRAY);
}
void proto_model::compress() {
ptr_vector<func_decl>::iterator it = m_func_decls.begin();
ptr_vector<func_decl>::iterator end = m_func_decls.end();
for (; it != end; ++it) {
func_decl * f = *it;
for (func_decl* f : m_func_decls) {
func_interp * fi = get_func_interp(f);
SASSERT(fi != 0);
fi->compress();
@ -373,23 +343,9 @@ void proto_model::compress() {
void proto_model::complete_partial_func(func_decl * f) {
func_interp * fi = get_func_interp(f);
if (fi && fi->is_partial()) {
expr * else_value = 0;
#if 0
// For UFBV benchmarks, setting the "else" to false is not a good idea.
// TODO: find a permanent solution. A possibility is to add another option.
if (m_manager.is_bool(f->get_range())) {
else_value = m_manager.mk_false();
}
else {
else_value = fi->get_max_occ_result();
if (else_value == 0)
else_value = get_some_value(f->get_range());
}
#else
else_value = fi->get_max_occ_result();
expr * else_value = fi->get_max_occ_result();
if (else_value == 0)
else_value = get_some_value(f->get_range());
#endif
fi->set_else(else_value);
}
}
@ -412,17 +368,13 @@ model * proto_model::mk_model() {
TRACE("proto_model", tout << "mk_model\n"; model_v2_pp(tout, *this););
model * m = alloc(model, m_manager);
decl2expr::iterator it1 = m_interp.begin();
decl2expr::iterator end1 = m_interp.end();
for (; it1 != end1; ++it1) {
m->register_decl(it1->m_key, it1->m_value);
for (auto const& kv : m_interp) {
m->register_decl(kv.m_key, kv.m_value);
}
decl2finterp::iterator it2 = m_finterp.begin();
decl2finterp::iterator end2 = m_finterp.end();
for (; it2 != end2; ++it2) {
m->register_decl(it2->m_key, it2->m_value);
m_manager.dec_ref(it2->m_key);
for (auto const& kv : m_finterp) {
m->register_decl(kv.m_key, kv.m_value);
m_manager.dec_ref(kv.m_key);
}
m_finterp.reset(); // m took the ownership of the func_interp's
@ -437,245 +389,3 @@ model * proto_model::mk_model() {
return m;
}
#if 0
#include "ast/simplifier/simplifier.h"
#include "ast/simplifier/basic_simplifier_plugin.h"
// Auxiliary function for computing fi(args[0], ..., args[fi.get_arity() - 1]).
// The result is stored in result.
// Return true if succeeded, and false otherwise.
// It uses the simplifier s during the computation.
bool eval(func_interp & fi, simplifier & s, expr * const * args, expr_ref & result) {
bool actuals_are_values = true;
if (fi.num_entries() != 0) {
for (unsigned i = 0; actuals_are_values && i < fi.get_arity(); i++) {
actuals_are_values = fi.m().is_value(args[i]);
}
}
func_entry * entry = fi.get_entry(args);
if (entry != 0) {
result = entry->get_result();
return true;
}
TRACE("func_interp", tout << "failed to find entry for: ";
for(unsigned i = 0; i < fi.get_arity(); i++)
tout << mk_pp(args[i], fi.m()) << " ";
tout << "\nis partial: " << fi.is_partial() << "\n";);
if (!fi.eval_else(args, result)) {
return false;
}
if (actuals_are_values && fi.args_are_values()) {
// cheap case... we are done
return true;
}
// build symbolic result... the actuals may be equal to the args of one of the entries.
basic_simplifier_plugin * bs = static_cast<basic_simplifier_plugin*>(s.get_plugin(fi.m().get_basic_family_id()));
for (unsigned k = 0; k < fi.num_entries(); k++) {
func_entry const * curr = fi.get_entry(k);
SASSERT(!curr->eq_args(fi.m(), fi.get_arity(), args));
if (!actuals_are_values || !curr->args_are_values()) {
expr_ref_buffer eqs(fi.m());
unsigned i = fi.get_arity();
while (i > 0) {
--i;
expr_ref new_eq(fi.m());
bs->mk_eq(curr->get_arg(i), args[i], new_eq);
eqs.push_back(new_eq);
}
SASSERT(eqs.size() == fi.get_arity());
expr_ref new_cond(fi.m());
bs->mk_and(eqs.size(), eqs.c_ptr(), new_cond);
bs->mk_ite(new_cond, curr->get_result(), result, result);
}
}
return true;
}
bool proto_model::eval(expr * e, expr_ref & result, bool model_completion) {
bool is_ok = true;
SASSERT(is_well_sorted(m_manager, e));
TRACE("model_eval", tout << mk_pp(e, m_manager) << "\n";
tout << "sort: " << mk_pp(m_manager.get_sort(e), m_manager) << "\n";);
obj_map<expr, expr*> eval_cache;
expr_ref_vector trail(m_manager);
sbuffer<std::pair<expr*, expr*>, 128> todo;
ptr_buffer<expr> args;
expr * null = static_cast<expr*>(0);
todo.push_back(std::make_pair(e, null));
simplifier m_simplifier(m_manager);
expr * a;
expr * expanded_a;
while (!todo.empty()) {
std::pair<expr *, expr *> & p = todo.back();
a = p.first;
expanded_a = p.second;
if (expanded_a != 0) {
expr * r = 0;
eval_cache.find(expanded_a, r);
SASSERT(r != 0);
todo.pop_back();
eval_cache.insert(a, r);
TRACE("model_eval",
tout << "orig:\n" << mk_pp(a, m_manager) << "\n";
tout << "after beta reduction:\n" << mk_pp(expanded_a, m_manager) << "\n";
tout << "new:\n" << mk_pp(r, m_manager) << "\n";);
}
else {
switch(a->get_kind()) {
case AST_APP: {
app * t = to_app(a);
bool visited = true;
args.reset();
unsigned num_args = t->get_num_args();
for (unsigned i = 0; i < num_args; ++i) {
expr * arg = 0;
if (!eval_cache.find(t->get_arg(i), arg)) {
visited = false;
todo.push_back(std::make_pair(t->get_arg(i), null));
}
else {
args.push_back(arg);
}
}
if (!visited) {
continue;
}
SASSERT(args.size() == t->get_num_args());
expr_ref new_t(m_manager);
func_decl * f = t->get_decl();
if (!has_interpretation(f)) {
// the model does not assign an interpretation to f.
SASSERT(new_t.get() == 0);
if (f->get_family_id() == null_family_id) {
if (model_completion) {
// create an interpretation for f.
new_t = mk_some_interp_for(f);
}
else {
TRACE("model_eval", tout << f->get_name() << " is uninterpreted\n";);
is_ok = false;
}
}
if (new_t.get() == 0) {
// t is interpreted or model completion is disabled.
m_simplifier.mk_app(f, num_args, args.c_ptr(), new_t);
TRACE("model_eval", tout << mk_pp(t, m_manager) << " -> " << new_t << "\n";);
trail.push_back(new_t);
if (!is_app(new_t) || to_app(new_t)->get_decl() != f || is_select_of_model_value(new_t)) {
// if the result is not of the form (f ...), then assume we must simplify it.
expr * new_new_t = 0;
if (!eval_cache.find(new_t.get(), new_new_t)) {
todo.back().second = new_t;
todo.push_back(std::make_pair(new_t, null));
continue;
}
else {
new_t = new_new_t;
}
}
}
}
else {
// the model has an interpretaion for f.
if (num_args == 0) {
// t is a constant
new_t = get_const_interp(f);
}
else {
// t is a function application
SASSERT(new_t.get() == 0);
// try to use function graph first
func_interp * fi = get_func_interp(f);
SASSERT(fi->get_arity() == num_args);
expr_ref r1(m_manager);
// fi may be partial...
if (!::eval(*fi, m_simplifier, args.c_ptr(), r1)) {
SASSERT(fi->is_partial()); // fi->eval only fails when fi is partial.
if (model_completion) {
expr * r = get_some_value(f->get_range());
fi->set_else(r);
SASSERT(!fi->is_partial());
new_t = r;
}
else {
// f is an uninterpreted function, there is no need to use m_simplifier.mk_app
new_t = m_manager.mk_app(f, num_args, args.c_ptr());
trail.push_back(new_t);
TRACE("model_eval", tout << f->get_name() << " is uninterpreted\n";);
is_ok = false;
}
}
else {
SASSERT(r1);
trail.push_back(r1);
TRACE("model_eval", tout << mk_pp(a, m_manager) << "\nevaluates to: " << r1 << "\n";);
expr * r2 = 0;
if (!eval_cache.find(r1.get(), r2)) {
todo.back().second = r1;
todo.push_back(std::make_pair(r1, null));
continue;
}
else {
new_t = r2;
}
}
}
}
TRACE("model_eval",
tout << "orig:\n" << mk_pp(t, m_manager) << "\n";
tout << "new:\n" << mk_pp(new_t, m_manager) << "\n";);
todo.pop_back();
SASSERT(new_t.get() != 0);
eval_cache.insert(t, new_t);
break;
}
case AST_VAR:
SASSERT(a != 0);
eval_cache.insert(a, a);
todo.pop_back();
break;
case AST_QUANTIFIER:
TRACE("model_eval", tout << "found quantifier\n" << mk_pp(a, m_manager) << "\n";);
is_ok = false; // evaluator does not handle quantifiers.
SASSERT(a != 0);
eval_cache.insert(a, a);
todo.pop_back();
break;
default:
UNREACHABLE();
break;
}
}
}
if (!eval_cache.find(e, a)) {
TRACE("model_eval", tout << "FAILED e: " << mk_bounded_pp(e, m_manager) << "\n";);
UNREACHABLE();
}
result = a;
std::cout << mk_pp(e, m_manager) << "\n===>\n" << result << "\n";
TRACE("model_eval",
ast_ll_pp(tout << "original: ", m_manager, e);
ast_ll_pp(tout << "evaluated: ", m_manager, a);
ast_ll_pp(tout << "reduced: ", m_manager, result.get());
tout << "sort: " << mk_pp(m_manager.get_sort(e), m_manager) << "\n";
);
SASSERT(is_well_sorted(m_manager, result.get()));
return is_ok;
}
#endif

4
src/smt/proto_model/proto_model.h
View file

@ -41,7 +41,6 @@ Revision History:
class proto_model : public model_core {
plugin_manager<value_factory> m_factories;
user_sort_factory * m_user_sort_factory;
family_id m_afid; //!< array family id: hack for displaying models in V1.x style
func_decl_set m_aux_decls;
ptr_vector<expr> m_tmp;
model_evaluator m_eval;
@ -58,7 +57,6 @@ class proto_model : public model_core {
void remove_aux_decls_not_in_set(ptr_vector<func_decl> & decls, func_decl_set const & s);
void cleanup_func_interp(func_interp * fi, func_decl_set & found_aux_fs);
bool is_select_of_model_value(expr* e) const;
public:
proto_model(ast_manager & m, params_ref const & p = params_ref());
@ -68,7 +66,6 @@ public:
bool eval(expr * e, expr_ref & result, bool model_completion = false);
bool is_as_array(expr * v) const;
value_factory * get_factory(family_id fid);
@ -84,6 +81,7 @@ public:
// Primitives for building models
//
void register_aux_decl(func_decl * f, func_interp * fi);
void register_aux_decl(func_decl * f);
void reregister_decl(func_decl * f, func_interp * new_fi, func_decl * f_aux);
void compress();
void cleanup();

39
src/smt/smt_model_checker.cpp
View file

@ -17,16 +17,15 @@ Revision History:
--*/
#include "smt/smt_model_checker.h"
#include "smt/smt_context.h"
#include "smt/smt_model_finder.h"
#include "ast/normal_forms/pull_quant.h"
#include "ast/for_each_expr.h"
#include "ast/rewriter/var_subst.h"
#include "ast/ast_pp.h"
#include "ast/ast_ll_pp.h"
#include "model/model_pp.h"
#include "ast/ast_smt2_pp.h"
#include "smt/smt_model_checker.h"
#include "smt/smt_context.h"
#include "smt/smt_model_finder.h"
#include "model/model_pp.h"
namespace smt {
@ -65,11 +64,9 @@ namespace smt {
expr * model_checker::get_term_from_ctx(expr * val) {
if (m_value2expr.empty()) {
// populate m_value2expr
obj_map<enode, app *>::iterator it = m_root2value->begin();
obj_map<enode, app *>::iterator end = m_root2value->end();
for (; it != end; ++it) {
enode * n = (*it).m_key;
expr * val = (*it).m_value;
for (auto const& kv : *m_root2value) {
enode * n = kv.m_key;
expr * val = kv.m_value;
n = n->get_eq_enode_with_min_gen();
m_value2expr.insert(val, n->get_owner());
}
@ -89,10 +86,7 @@ namespace smt {
void model_checker::restrict_to_universe(expr * sk, obj_hashtable<expr> const & universe) {
SASSERT(!universe.empty());
ptr_buffer<expr> eqs;
obj_hashtable<expr>::iterator it = universe.begin();
obj_hashtable<expr>::iterator end = universe.end();
for (; it != end; ++it) {
expr * e = *it;
for (expr * e : universe) {
eqs.push_back(m.mk_eq(sk, e));
}
expr_ref fml(m.mk_or(eqs.size(), eqs.c_ptr()), m);
@ -201,9 +195,8 @@ namespace smt {
void model_checker::add_instance(quantifier* q, expr_ref_vector const& bindings, unsigned max_generation) {
SASSERT(q->get_num_decls() == bindings.size());
for (unsigned i = 0; i < bindings.size(); i++)
m_pinned_exprs.push_back(bindings[i]);
for (expr* b : bindings)
m_pinned_exprs.push_back(b);
m_pinned_exprs.push_back(q);
void * mem = m_new_instances_region.allocate(instance::get_obj_size(q->get_num_decls()));
@ -237,10 +230,8 @@ namespace smt {
bool model_checker::add_blocking_clause(model * cex, expr_ref_vector & sks) {
SASSERT(cex != 0);
unsigned num_sks = sks.size();
expr_ref_buffer diseqs(m);
for (unsigned i = 0; i < num_sks; i++) {
expr * sk = sks.get(i);
for (expr * sk : sks) {
func_decl * sk_d = to_app(sk)->get_decl();
expr_ref sk_value(m);
sk_value = cex->get_const_interp(sk_d);
@ -272,8 +263,7 @@ namespace smt {
assert_neg_q_m(flat_q, sks);
TRACE("model_checker", tout << "skolems:\n";
for (unsigned i = 0; i < sks.size(); i++) {
expr * sk = sks.get(i);
for (expr* sk : sks) {
tout << mk_ismt2_pp(sk, m) << " " << mk_pp(m.get_sort(sk), m) << "\n";
});
@ -486,10 +476,7 @@ namespace smt {
TRACE("model_checker_bug_detail", tout << "assert_new_instances, inconsistent: " << m_context->inconsistent() << "\n";);
ptr_buffer<enode> bindings;
ptr_vector<enode> dummy;
ptr_vector<instance>::iterator it = m_new_instances.begin();
ptr_vector<instance>::iterator end = m_new_instances.end();
for (; it != end; ++it) {
instance * inst = *it;
for (instance* inst : m_new_instances) {
quantifier * q = inst->m_q;
if (m_context->b_internalized(q)) {
bindings.reset();

495
src/smt/smt_model_finder.cpp
View file

@ -16,8 +16,8 @@ Author:
Revision History:
--*/
#include "smt/smt_model_finder.h"
#include "smt/smt_context.h"
#include "util/cooperate.h"
#include "util/backtrackable_set.h"
#include "ast/ast_util.h"
#include "ast/macros/macro_util.h"
#include "ast/arith_decl_plugin.h"
@ -27,14 +27,14 @@ Revision History:
#include "ast/simplifier/bv_simplifier_plugin.h"
#include "ast/normal_forms/pull_quant.h"
#include "ast/rewriter/var_subst.h"
#include "util/backtrackable_set.h"
#include "ast/for_each_expr.h"
#include "ast/ast_pp.h"
#include "ast/ast_ll_pp.h"
#include "ast/well_sorted.h"
#include "model/model_pp.h"
#include "ast/ast_smt2_pp.h"
#include "util/cooperate.h"
#include "model/model_pp.h"
#include "smt/smt_model_finder.h"
#include "smt/smt_context.h"
#include "tactic/tactic_exception.h"
namespace smt {
@ -56,11 +56,9 @@ namespace smt {
v1.swap(v2);
return;
}
typename ptr_vector<T>::iterator it = v2.begin();
typename ptr_vector<T>::iterator end = v2.end();
for (; it != end; ++it) {
if (!v1.contains(*it))
v1.push_back(*it);
for (T* t : v2) {
if (!v1.contains(t))
v1.push_back(t);
}
v2.finalize();
}
@ -88,10 +86,8 @@ namespace smt {
instantiation_set(ast_manager & m):m_manager(m) {}
~instantiation_set() {
obj_map<expr, unsigned>::iterator it = m_elems.begin();
obj_map<expr, unsigned>::iterator end = m_elems.end();
for (; it != end; ++it) {
m_manager.dec_ref((*it).m_key);
for (auto const& kv : m_elems) {
m_manager.dec_ref(kv.m_key);
}
m_elems.reset();
}
@ -116,16 +112,12 @@ namespace smt {
}
void display(std::ostream & out) const {
obj_map<expr, unsigned>::iterator it = m_elems.begin();
obj_map<expr, unsigned>::iterator end = m_elems.end();
for (; it != end; ++it) {
out << mk_bounded_pp((*it).m_key, m_manager) << " [" << (*it).m_value << "]\n";
for (auto const& kv : m_elems) {
out << mk_bounded_pp(kv.m_key, m_manager) << " [" << kv.m_value << "]\n";
}
out << "inverse:\n";
obj_map<expr, expr *>::iterator it2 = m_inv.begin();
obj_map<expr, expr *>::iterator end2 = m_inv.end();
for (; it2 != end2; ++it2) {
out << mk_bounded_pp((*it2).m_key, m_manager) << " -> " << mk_bounded_pp((*it2).m_value, m_manager) << "\n";
for (auto const& kv : m_inv) {
out << mk_bounded_pp(kv.m_key, m_manager) << " -> " << mk_bounded_pp(kv.m_value, m_manager) << "\n";
}
}
@ -142,12 +134,10 @@ namespace smt {
}
void mk_inverse(evaluator & ev) {
obj_map<expr, unsigned>::iterator it = m_elems.begin();
obj_map<expr, unsigned>::iterator end = m_elems.end();
for (; it != end; ++it) {
expr * t = (*it).m_key;
for (auto const& kv : m_elems) {
expr * t = kv.m_key;
SASSERT(!contains_model_value(t));
unsigned gen = (*it).m_value;
unsigned gen = kv.m_value;
expr * t_val = ev.eval(t, true);
if (!t_val) break;
TRACE("model_finder", tout << mk_pp(t, m_manager) << " " << mk_pp(t_val, m_manager) << "\n";);
@ -329,17 +319,13 @@ namespace smt {
out << "root node ------\n";
out << "@" << m_id << " mono: " << m_mono_proj << " signed: " << m_signed_proj << ", sort: " << mk_pp(m_sort, m) << "\n";
out << "avoid-set: ";
ptr_vector<node>::const_iterator it1 = m_avoid_set.begin();
ptr_vector<node>::const_iterator end1 = m_avoid_set.end();
for (; it1 != end1; ++it1) {
out << "@" << (*it1)->get_root()->get_id() << " ";
for (node* n : m_avoid_set) {
out << "@" << n->get_root()->get_id() << " ";
}
out << "\n";
out << "exceptions: ";
ptr_vector<expr>::const_iterator it2 = m_exceptions.begin();
ptr_vector<expr>::const_iterator end2 = m_exceptions.end();
for (; it2 != end2; ++it2) {
out << mk_bounded_pp((*it2), m) << " ";
for (expr * e : m_exceptions) {
out << mk_bounded_pp(e, m) << " ";
}
out << "\n";
if (m_else)
@ -368,10 +354,8 @@ namespace smt {
// return true if m_avoid_set.contains(this)
bool must_avoid_itself() const {
node * r = get_root();
ptr_vector<node>::const_iterator it = m_avoid_set.begin();
ptr_vector<node>::const_iterator end = m_avoid_set.end();
for (; it != end; ++it) {
if (r == (*it)->get_root())
for (node* n : m_avoid_set) {
if (r == n->get_root())
return true;
}
return false;
@ -460,23 +444,19 @@ namespace smt {
}
void display_key2node(std::ostream & out, key2node const & m) const {
key2node::iterator it = m.begin();
key2node::iterator end = m.end();
for (; it != end; ++it) {
ast * a = (*it).m_key.first;
unsigned i = (*it).m_key.second;
node * n = (*it).m_value;
for (auto const& kv : m) {
ast * a = kv.m_key.first;
unsigned i = kv.m_key.second;
node * n = kv.m_value;
out << "#" << a->get_id() << ":" << i << " -> @" << n->get_id() << "\n";
}
}
void display_A_f_is(std::ostream & out) const {
key2node::iterator it = m_A_f_is.begin();
key2node::iterator end = m_A_f_is.end();
for (; it != end; ++it) {
func_decl * f = static_cast<func_decl*>((*it).m_key.first);
unsigned i = (*it).m_key.second;
node * n = (*it).m_value;
for (auto const& kv : m_A_f_is) {
func_decl * f = static_cast<func_decl*>(kv.m_key.first);
unsigned i = kv.m_key.second;
node * n = kv.m_value;
out << f->get_name() << ":" << i << " -> @" << n->get_id() << "\n";
}
}
@ -556,10 +536,7 @@ namespace smt {
}
void mk_instantiation_sets() {
ptr_vector<node>::const_iterator it = m_nodes.begin();
ptr_vector<node>::const_iterator end = m_nodes.end();
for (; it != end; ++it) {
node * curr = *it;
for (node* curr : m_nodes) {
if (curr->is_root()) {
curr->mk_instantiation_set(m_manager);
}
@ -569,22 +546,19 @@ namespace smt {
// For each instantiation_set, reemove entries that do not evaluate to values.
void cleanup_instantiation_sets() {
ptr_vector<expr> to_delete;
ptr_vector<node>::const_iterator it = m_nodes.begin();
ptr_vector<node>::const_iterator end = m_nodes.end();
for (; it != end; ++it) {
node * curr = *it;
for (node * curr : m_nodes) {
if (curr->is_root()) {
instantiation_set * s = curr->get_instantiation_set();
to_delete.reset();
obj_map<expr, unsigned> const & elems = s->get_elems();
for (obj_map<expr, unsigned>::iterator it = elems.begin(); it != elems.end(); it++) {
expr * n = it->m_key;
for (auto const& kv : elems) {
expr * n = kv.m_key;
expr * n_val = eval(n, true);
if (!n_val || !m_manager.is_value(n_val))
to_delete.push_back(n);
}
for (ptr_vector<expr>::iterator it = to_delete.begin(); it != to_delete.end(); it++) {
s->remove(*it);
for (expr* e : to_delete) {
s->remove(e);
}
}
}
@ -592,11 +566,9 @@ namespace smt {
void display_nodes(std::ostream & out) const {
display_key2node(out, m_uvars);
display_A_f_is(out);
ptr_vector<node>::const_iterator it = m_nodes.begin();
ptr_vector<node>::const_iterator end = m_nodes.end();
for (; it != end; ++it) {
(*it)->display(out, m_manager);
display_A_f_is(out);
for (node* n : m_nodes) {
n->display(out, m_manager);
}
}
@ -628,18 +600,14 @@ namespace smt {
ptr_vector<expr> const & exceptions = n->get_exceptions();
ptr_vector<node> const & avoid_set = n->get_avoid_set();
ptr_vector<expr>::const_iterator it1 = exceptions.begin();
ptr_vector<expr>::const_iterator end1 = exceptions.end();
for (; it1 != end1; ++it1) {
expr * val = eval(*it1, true);
for (expr* e : exceptions) {
expr * val = eval(e, true);
SASSERT(val != 0);
r.push_back(val);
}
ptr_vector<node>::const_iterator it2 = avoid_set.begin();
ptr_vector<node>::const_iterator end2 = avoid_set.end();
for (; it2 != end2; ++it2) {
node * n = (*it2)->get_root();
for (node* a : avoid_set) {
node * n = a->get_root();
if (!n->is_mono_proj() && n->get_else() != 0) {
expr * val = eval(n->get_else(), true);
SASSERT(val != 0);
@ -661,20 +629,19 @@ namespace smt {
expr * t_result = 0;
unsigned gen_result = UINT_MAX;
obj_map<expr, unsigned>::iterator it1 = elems.begin();
obj_map<expr, unsigned>::iterator end1 = elems.end();
for (; it1 != end1; ++it1) {
expr * t = (*it1).m_key;
unsigned gen = (*it1).m_value;
for (auto const& kv : elems) {
expr * t = kv.m_key;
unsigned gen = kv.m_value;
expr * t_val = eval(t, true);
SASSERT(t_val != 0);
ptr_buffer<expr>::const_iterator it2 = ex_vals.begin();
ptr_buffer<expr>::const_iterator end2 = ex_vals.end();
for (; it2 != end2; ++it2) {
if (!m_manager.are_distinct(t_val, *it2))
bool found = false;
for (expr* v : ex_vals) {
if (!m_manager.are_distinct(t_val, v)) {
found = true;
break;
}
}
if (it2 == end2 && (t_result == 0 || gen < gen_result)) {
if (!found && (t_result == 0 || gen < gen_result)) {
t_result = t;
gen_result = gen;
}
@ -699,6 +666,7 @@ namespace smt {
if (m_sort2k.find(s, r))
return r;
r = m_manager.mk_fresh_const("k", s);
m_model->register_aux_decl(r->get_decl());
m_sort2k.insert(s, r);
m_ks.push_back(r);
return r;
@ -734,14 +702,11 @@ namespace smt {
*/
bool assert_k_diseq_exceptions(app * k, ptr_vector<expr> const & exceptions) {
TRACE("assert_k_diseq_exceptions", tout << "assert_k_diseq_exceptions, " << "k: " << mk_pp(k, m_manager) << "\nexceptions:\n";
for (unsigned i = 0; i < exceptions.size(); i++) tout << mk_pp(exceptions[i], m_manager) << "\n";);
for (expr * e : exceptions) tout << mk_pp(e, m_manager) << "\n";);
expr * k_interp = get_k_interp(k);
if (k_interp == 0)
return false;
ptr_vector<expr>::const_iterator it = exceptions.begin();
ptr_vector<expr>::const_iterator end = exceptions.end();
for (; it != end; ++it) {
expr * ex = *it;
for (expr * ex : exceptions) {
expr * ex_val = eval(ex, true);
if (!m_manager.are_distinct(k_interp, ex_val)) {
SASSERT(m_new_constraints);
@ -806,10 +771,7 @@ namespace smt {
expr_ref one(m_manager);
one = ps->mk_one();
ptr_vector<expr> const & exceptions = n->get_exceptions();
ptr_vector<expr>::const_iterator it = exceptions.begin();
ptr_vector<expr>::const_iterator end = exceptions.end();
for (; it != end; ++it) {
expr * e = *it;
for (expr * e : exceptions) {
expr_ref e_plus_1(m_manager);
expr_ref e_minus_1(m_manager);
TRACE("mf_simp_bug", tout << "e:\n" << mk_ismt2_pp(e, m_manager) << "\none:\n" << mk_ismt2_pp(one, m_manager) << "\n";);
@ -825,10 +787,8 @@ namespace smt {
instantiation_set const * s = n->get_instantiation_set();
obj_hashtable<expr> already_found;
obj_map<expr, unsigned> const & elems = s->get_elems();
obj_map<expr, unsigned>::iterator it = elems.begin();
obj_map<expr, unsigned>::iterator end = elems.end();
for (; it != end; ++it) {
expr * t = (*it).m_key;
for (auto const& kv : elems) {
expr * t = kv.m_key;
expr * t_val = eval(t, true);
if (t_val && !already_found.contains(t_val)) {
values.push_back(t_val);
@ -836,10 +796,7 @@ namespace smt {
}
}
TRACE("model_finder_bug", tout << "values for the instantiation_set of @" << n->get_id() << "\n";
ptr_buffer<expr>::const_iterator it = values.begin();
ptr_buffer<expr>::const_iterator end = values.end();
for (; it != end; ++it) {
expr * v = *it;
for (expr * v : values) {
tout << mk_pp(v, m_manager) << "\n";
});
}
@ -941,10 +898,7 @@ namespace smt {
}
void mk_projections() {
ptr_vector<node>::const_iterator it = m_root_nodes.begin();
ptr_vector<node>::const_iterator end = m_root_nodes.end();
for (; it != end; ++it) {
node * n = *it;
for (node * n : m_root_nodes) {
SASSERT(n->is_root());
if (n->is_mono_proj())
mk_mono_proj(n);
@ -957,10 +911,8 @@ namespace smt {
\brief Store in r the partial functions that have A_f_i nodes.
*/
void collect_partial_funcs(func_decl_set & r) {
key2node::iterator it = m_A_f_is.begin();
key2node::iterator end = m_A_f_is.end();
for (; it != end; ++it) {
func_decl * f = to_func_decl((*it).m_key.first);
for (auto const& kv : m_A_f_is) {
func_decl * f = to_func_decl(kv.m_key.first);
if (!r.contains(f)) {
func_interp * fi = m_model->get_func_interp(f);
if (fi == 0) {
@ -983,10 +935,7 @@ namespace smt {
for more details.
*/
void mk_sorts_finite() {
ptr_vector<node>::const_iterator it = m_root_nodes.begin();
ptr_vector<node>::const_iterator end = m_root_nodes.end();
for (; it != end; ++it) {
node * n = *it;
for (node * n : m_root_nodes) {
SASSERT(n->is_root());
sort * s = n->get_sort();
if (m_manager.is_uninterp(s) &&
@ -998,13 +947,10 @@ namespace smt {
}
}
void add_elem_to_empty_inst_sets() {
ptr_vector<node>::const_iterator it = m_root_nodes.begin();
ptr_vector<node>::const_iterator end = m_root_nodes.end();
void add_elem_to_empty_inst_sets() {
obj_map<sort, expr*> sort2elems;
ptr_vector<node> need_fresh;
for (; it != end; ++it) {
node * n = *it;
for (node * n : m_root_nodes) {
SASSERT(n->is_root());
instantiation_set const * s = n->get_instantiation_set();
TRACE("model_finder", s->display(tout););
@ -1047,10 +993,7 @@ namespace smt {
*/
void collect_root_nodes() {
m_root_nodes.reset();
ptr_vector<node>::const_iterator it = m_nodes.begin();
ptr_vector<node>::const_iterator end = m_nodes.end();
for (; it != end; ++it) {
node * n = *it;
for (node * n : m_nodes) {
if (n->is_root())
m_root_nodes.push_back(n);
}
@ -1085,10 +1028,7 @@ namespace smt {
collected in the beginning of fix_model().
*/
void complete_partial_funcs(func_decl_set const & partial_funcs) {
func_decl_set::iterator it = partial_funcs.begin();
func_decl_set::iterator end = partial_funcs.end();
for (; it != end; ++it) {
func_decl * f = *it;
for (func_decl * f : partial_funcs) {
// Complete the current interpretation
m_model->complete_partial_func(f);
@ -1129,10 +1069,7 @@ namespace smt {
}
void mk_inverses() {
ptr_vector<node>::const_iterator it = m_root_nodes.begin();
ptr_vector<node>::const_iterator end = m_root_nodes.end();
for (; it != end; ++it) {
node * n = *it;
for (node * n : m_root_nodes) {
SASSERT(n->is_root());
mk_inverse(n);
}
@ -1360,16 +1297,14 @@ namespace smt {
ps = bs;
instantiation_set const * from_s = from->get_instantiation_set();
obj_map<expr, unsigned> const & elems_s = from_s->get_elems();
obj_map<expr, unsigned>::iterator it = elems_s.begin();
obj_map<expr, unsigned>::iterator end = elems_s.end();
for (; it != end; ++it) {
expr * n = (*it).m_key;
for (auto const& kv : elems_s) {
expr * n = kv.m_key;
expr_ref n_k(m_offset.get_manager());
if (PLUS)
ps->mk_add(n, m_offset, n_k);
else
ps->mk_sub(n, m_offset, n_k);
to->insert(n_k, (*it).m_value);
to->insert(n_k, kv.m_value);
}
}
@ -1414,10 +1349,7 @@ namespace smt {
app * nested_array = to_app(auf_arr->get_arg(0));
ptr_buffer<enode> nested_arrays;
get_auf_arrays(nested_array, ctx, nested_arrays);
ptr_buffer<enode>::const_iterator it = nested_arrays.begin();
ptr_buffer<enode>::const_iterator end = nested_arrays.end();
for (; it != end; ++it) {
enode * curr = *it;
for (enode * curr : nested_arrays) {
enode_vector::iterator it2 = curr->begin_parents();
enode_vector::iterator end2 = curr->end_parents();
for (; it2 != end2; ++it2) {
@ -1433,6 +1365,7 @@ namespace smt {
class select_var : public qinfo {
protected:
ast_manager & m_manager;
array_util m_array;
app * m_select; // It must satisfy is_auf_select... see bool is_auf_select(expr * t) const
unsigned m_arg_i;
unsigned m_var_j;
@ -1441,13 +1374,13 @@ namespace smt {
func_decl * get_array_func_decl(app * ground_array, auf_solver & s) {
expr * ground_array_interp = s.eval(ground_array, false);
if (ground_array_interp != 0 && s.get_model()->is_as_array(ground_array_interp))
return to_func_decl(to_app(ground_array_interp)->get_decl()->get_parameter(0).get_ast());
if (ground_array_interp != 0 && m_array.is_as_array(ground_array_interp))
return m_array.get_as_array_func_decl(ground_array_interp);
return 0;
}
public:
select_var(ast_manager & m, app * s, unsigned i, unsigned j):m_manager(m), m_select(s), m_arg_i(i), m_var_j(j) {}
select_var(ast_manager & m, app * s, unsigned i, unsigned j):m_manager(m), m_array(m), m_select(s), m_arg_i(i), m_var_j(j) {}
virtual ~select_var() {}
virtual char const * get_kind() const {
@ -1470,16 +1403,12 @@ namespace smt {
get_auf_arrays(get_array(), ctx, arrays);
TRACE("select_var",
tout << "enodes matching: "; display(tout); tout << "\n";
ptr_buffer<enode>::const_iterator it = arrays.begin();
ptr_buffer<enode>::const_iterator end = arrays.end();
for (; it != end; ++it) {
tout << "#" << (*it)->get_owner()->get_id() << "\n" << mk_pp((*it)->get_owner(), m_manager) << "\n";
for (enode* n : arrays) {
tout << "#" << n->get_owner()->get_id() << "\n" << mk_pp(n->get_owner(), m_manager) << "\n";
});
node * n1 = s.get_uvar(q, m_var_j);
ptr_buffer<enode>::const_iterator it = arrays.begin();
ptr_buffer<enode>::const_iterator end = arrays.end();
for (; it != end; ++it) {
app * ground_array = (*it)->get_owner();
for (enode* n : arrays) {
app * ground_array = n->get_owner();
func_decl * f = get_array_func_decl(ground_array, s);
if (f) {
SASSERT(m_arg_i >= 1);
@ -1492,10 +1421,7 @@ namespace smt {
virtual void populate_inst_sets(quantifier * q, auf_solver & s, context * ctx) {
ptr_buffer<enode> arrays;
get_auf_arrays(get_array(), ctx, arrays);
ptr_buffer<enode>::const_iterator it = arrays.begin();
ptr_buffer<enode>::const_iterator end = arrays.end();
for (; it != end; ++it) {
enode * curr = (*it);
for (enode * curr : arrays) {
app * ground_array = curr->get_owner();
func_decl * f = get_array_func_decl(ground_array, s);
if (f) {
@ -1778,11 +1704,9 @@ namespace smt {
void insert_qinfo(qinfo * qi) {
// I'm assuming the number of qinfo's per quantifier is small. So, the linear search is not a big deal.
scoped_ptr<qinfo> q(qi);
ptr_vector<qinfo>::iterator it = m_qinfo_vect.begin();
ptr_vector<qinfo>::iterator end = m_qinfo_vect.end();
for (; it != end; ++it) {
for (qinfo* qi2 : m_qinfo_vect) {
checkpoint();
if (qi->is_equal(*it)) {
if (qi->is_equal(qi2)) {
return;
}
}
@ -1876,22 +1800,16 @@ namespace smt {
out << "IS_AUF: " << m_is_auf << ", has x=y: " << m_has_x_eq_y << "\n";
out << "unary function fragment: " << unary_function_fragment() << "\n";
out << "ng decls: ";
func_decl_set::iterator it1 = m_ng_decls.begin();
func_decl_set::iterator end1 = m_ng_decls.end();
for (; it1 != end1; ++it1) {
out << (*it1)->get_name() << " ";
for (func_decl * f : m_ng_decls) {
out << f->get_name() << " ";
}
out << "\ninfo bits:\n";
ptr_vector<qinfo>::const_iterator it2 = m_qinfo_vect.begin();
ptr_vector<qinfo>::const_iterator end2 = m_qinfo_vect.end();
for (; it2 != end2; ++it2) {
out << " "; (*it2)->display(out); out << "\n";
for (qinfo* qi : m_qinfo_vect) {
out << " "; qi->display(out); out << "\n";
}
out << "\nmacros:\n";
ptr_vector<cond_macro>::const_iterator it3 = m_cond_macros.begin();
ptr_vector<cond_macro>::const_iterator end3 = m_cond_macros.end();
for (; it3 != end3; ++it3) {
out << " "; (*it3)->display(out); out << "\n";
for (cond_macro* cm : m_cond_macros) {
out << " "; cm->display(out); out << "\n";
}
}
@ -1900,23 +1818,19 @@ namespace smt {
// make sure a node exists for each variable.
s.get_uvar(m_flat_q, i);
}
ptr_vector<qinfo>::const_iterator it = m_qinfo_vect.begin();
ptr_vector<qinfo>::const_iterator end = m_qinfo_vect.end();
for (; it != end; ++it) {
(*it)->process_auf(m_flat_q, s, ctx);
for (qinfo * qi : m_qinfo_vect) {
qi->process_auf(m_flat_q, s, ctx);
}
}
void populate_inst_sets(auf_solver & s, context * ctx) {
ptr_vector<qinfo>::const_iterator it = m_qinfo_vect.begin();
ptr_vector<qinfo>::const_iterator end = m_qinfo_vect.end();
for (; it != end; ++it)
(*it)->populate_inst_sets(m_flat_q, s, ctx);
for (qinfo * qi : m_qinfo_vect) {
qi->populate_inst_sets(m_flat_q, s, ctx);
}
// second pass
it = m_qinfo_vect.begin();
for (; it != end; ++it) {
for (qinfo * qi : m_qinfo_vect) {
checkpoint();
(*it)->populate_inst_sets2(m_flat_q, s, ctx);
qi->populate_inst_sets2(m_flat_q, s, ctx);
}
}
@ -1929,14 +1843,9 @@ namespace smt {
if (m_uvar_inst_sets != 0)
return;
m_uvar_inst_sets = alloc(ptr_vector<instantiation_set>);
ptr_vector<qinfo>::const_iterator it = m_qinfo_vect.begin();
ptr_vector<qinfo>::const_iterator end = m_qinfo_vect.end();
for (; it != end; ++it)
(*it)->populate_inst_sets(m_flat_q, m_the_one, *m_uvar_inst_sets, ctx);
ptr_vector<instantiation_set>::iterator it2 = m_uvar_inst_sets->begin();
ptr_vector<instantiation_set>::iterator end2 = m_uvar_inst_sets->end();
for (; it2 != end2; ++it2) {
instantiation_set * s = *it2;
for (qinfo* qi : m_qinfo_vect)
qi->populate_inst_sets(m_flat_q, m_the_one, *m_uvar_inst_sets, ctx);
for (instantiation_set * s : *m_uvar_inst_sets) {
if (s != 0)
s->mk_inverse(ev);
}
@ -2230,9 +2139,7 @@ namespace smt {
expr * a = to_app(t)->get_arg(0);
if (!is_ground(a) && !is_auf_select(a))
return false;
unsigned num_args = to_app(t)->get_num_args();
for (unsigned i = 1; i < num_args; i++) {
expr * arg = to_app(t)->get_arg(i);
for (expr * arg : *to_app(t)) {
if (!is_ground(arg) && !is_var(arg))
return false;
}
@ -2258,9 +2165,9 @@ namespace smt {
}
}
else {
unsigned num_args = t->get_num_args();
for (unsigned i = 0; i < num_args; i++)
visit_term(t->get_arg(i));
for (expr * arg : *t) {
visit_term(arg);
}
}
}
@ -2577,10 +2484,7 @@ namespace smt {
\brief Return true if \c f is in (qs\{q})
*/
bool contains(func_decl * f, ptr_vector<quantifier> const & qs, quantifier * q) {
ptr_vector<quantifier>::const_iterator it = qs.begin();
ptr_vector<quantifier>::const_iterator end = qs.end();
for (; it != end; ++it) {
quantifier * other = *it;
for (quantifier * other : qs) {
if (q == other)
continue;
quantifier_info * other_qi = get_qinfo(other);
@ -2619,13 +2523,11 @@ namespace smt {
virtual bool process(ptr_vector<quantifier> const & qs, ptr_vector<quantifier> & new_qs, ptr_vector<quantifier> & residue) {
bool removed = false;
ptr_vector<quantifier>::const_iterator it = qs.begin();
ptr_vector<quantifier>::const_iterator end = qs.end();
for (; it != end; ++it) {
if (process(*it, qs))
for (quantifier* q : qs) {
if (process(q, qs))
removed = true;
else
new_qs.push_back(*it);
new_qs.push_back(q);
}
return removed;
}
@ -2774,20 +2676,15 @@ namespace smt {
void register_decls_as_forbidden(quantifier * q) {
quantifier_info * qi = get_qinfo(q);
func_decl_set const & ng_decls = qi->get_ng_decls();
func_decl_set::iterator it = ng_decls.begin();
func_decl_set::iterator end = ng_decls.end();
for (; it != end; ++it) {
m_forbidden.insert(*it);
for (func_decl* f : ng_decls) {
m_forbidden.insert(f);
}
}
void preprocess(ptr_vector<quantifier> const & qs, ptr_vector<quantifier> & qcandidates, ptr_vector<quantifier> & non_qcandidates) {
ptr_vector<quantifier> curr(qs);
while (true) {
ptr_vector<quantifier>::iterator it = curr.begin();
ptr_vector<quantifier>::iterator end = curr.end();
for (; it != end; ++it) {
quantifier * q = *it;
for (quantifier * q : curr) {
if (is_candidate(q)) {
qcandidates.push_back(q);
}
@ -2805,16 +2702,10 @@ namespace smt {
}
void mk_q_f_defs(ptr_vector<quantifier> const & qs) {
ptr_vector<quantifier>::const_iterator it = qs.begin();
ptr_vector<quantifier>::const_iterator end = qs.end();
for (; it != end; ++it) {
quantifier * q = *it;
for (quantifier * q : qs) {
quantifier_info * qi = get_qinfo(q);
func_decl_set const & ng_decls = qi->get_ng_decls();
func_decl_set::iterator it2 = ng_decls.begin();
func_decl_set::iterator end2 = ng_decls.end();
for (; it2 != end2; ++it2) {
func_decl * f = *it2;
for (func_decl* f : ng_decls) {
if (!m_forbidden.contains(f))
insert_q_f(q, f);
}
@ -2831,40 +2722,30 @@ namespace smt {
}
static void display_quantifier_set(std::ostream & out, quantifier_set const * s) {
quantifier_set::iterator it = s->begin();
quantifier_set::iterator end = s->end();
for (; it != end; ++it) {
quantifier * q = *it;
for (quantifier* q : *s) {
out << q->get_qid() << " ";
}
out << "\n";
}
void display_qcandidates(std::ostream & out, ptr_vector<quantifier> const & qcandidates) const {
ptr_vector<quantifier>::const_iterator it1 = qcandidates.begin();
ptr_vector<quantifier>::const_iterator end1 = qcandidates.end();
for (; it1 != end1; ++it1) {
quantifier * q = *it1;
for (quantifier * q : qcandidates) {
out << q->get_qid() << " ->\n" << mk_pp(q, m_manager) << "\n";
quantifier_info * qi = get_qinfo(q);
qi->display(out);
out << "------\n";
}
out << "Sets Q_f\n";
q_f::iterator it2 = m_q_f.begin();
q_f::iterator end2 = m_q_f.end();
for (; it2 != end2; ++it2) {
func_decl * f = (*it2).m_key;
quantifier_set * s = (*it2).m_value;
for (auto const& kv : m_q_f) {
func_decl * f = kv.m_key;
quantifier_set * s = kv.m_value;
out << f->get_name() << " -> "; display_quantifier_set(out, s);
}
out << "Sets Q_{f = def}\n";
q_f_def::iterator it3 = m_q_f_def.begin();
q_f_def::iterator end3 = m_q_f_def.end();
for (; it3 != end3; ++it3) {
func_decl * f = (*it3).get_key1();
expr * def = (*it3).get_key2();
quantifier_set * s = (*it3).get_value();
for (auto const& kv : m_q_f_def) {
func_decl * f = kv.get_key1();
expr * def = kv.get_key2();
quantifier_set * s = kv.get_value();
out << f->get_name() << " " << mk_pp(def, m_manager) << " ->\n"; display_quantifier_set(out, s);
}
}
@ -2899,32 +2780,23 @@ namespace smt {
void display_search_state(std::ostream & out) const {
out << "fs:\n";
f2def::iterator it3 = m_fs.begin();
f2def::iterator end3 = m_fs.end();
for (; it3 != end3; ++it3) {
out << (*it3).m_key->get_name() << " ";
for (auto const& kv : m_fs) {
out << kv.m_key->get_name() << " ";
}
out << "\nsatisfied:\n";
qsset::iterator it = m_satisfied.begin();
qsset::iterator end = m_satisfied.end();
for (; it != end; ++it) {
out << (*it)->get_qid() << " ";
for (auto q : m_satisfied) {
out << q->get_qid() << " ";
}
out << "\nresidue:\n";
qset::iterator it2 = m_residue.begin();
qset::iterator end2 = m_residue.end();
for (; it2 != end2; ++it2) {
out << (*it2)->get_qid() << " ";
for (auto q : m_residue) {
out << q->get_qid() << " ";
}
out << "\n";
}
bool check_satisfied_residue_invariant() {
DEBUG_CODE(
qsset::iterator it = m_satisfied.begin();
qsset::iterator end = m_satisfied.end();
for (; it != end; ++it) {
quantifier * q = *it;
for (quantifier * q : m_satisfied) {
SASSERT(!m_residue.contains(q));
quantifier_info * qi = get_qinfo(q);
SASSERT(qi != 0);
@ -2939,10 +2811,7 @@ namespace smt {
SASSERT(check_satisfied_residue_invariant());
quantifier_set * q_f = get_q_f(f);
quantifier_set * q_f_def = get_q_f_def(f, def);
quantifier_set::iterator it = q_f_def->begin();
quantifier_set::iterator end = q_f_def->end();
for (; it != end; ++it) {
quantifier * q = *it;
for (quantifier * q : *q_f_def) {
if (!m_satisfied.contains(q)) {
useful = true;
m_residue.erase(q);
@ -2954,10 +2823,7 @@ namespace smt {
}
if (!useful)
return false;
it = q_f->begin();
end = q_f->end();
for (; it != end; ++it) {
quantifier * q = *it;
for (quantifier * q : *q_f) {
if (!m_satisfied.contains(q)) {
m_residue.insert(q);
}
@ -2971,10 +2837,7 @@ namespace smt {
The candidates must not be elements of m_fs.
*/
void get_candidates_from_residue(func_decl_set & candidates) {
qset::iterator it = m_residue.begin();
qset::iterator end = m_residue.end();
for (; it != end; ++it) {
quantifier * q = *it;
for (quantifier * q : m_residue) {
quantifier_info * qi = get_qinfo(q);
quantifier_info::macro_iterator it2 = qi->begin_macros();
@ -3003,10 +2866,7 @@ namespace smt {
display_search_state(tout););
expr_set * s = get_f_defs(f);
expr_set::iterator it = s->begin();
expr_set::iterator end = s->end();
for (; it != end; ++it) {
expr * def = *it;
for (expr * def : *s) {
SASSERT(!m_fs.contains(f));
@ -3041,17 +2901,13 @@ namespace smt {
get_candidates_from_residue(candidates);
TRACE("model_finder_hint", tout << "candidates from residue:\n";
func_decl_set::iterator it = candidates.begin();
func_decl_set::iterator end = candidates.end();
for (; it != end; ++it) {
tout << (*it)->get_name() << " ";
for (func_decl * f : candidates) {
tout << f->get_name() << " ";
}
tout << "\n";);
func_decl_set::iterator it = candidates.begin();
func_decl_set::iterator end = candidates.end();
for (; it != end; ++it) {
greedy(*it, depth);
for (func_decl* f : candidates) {
greedy(f, depth);
}
}
@ -3071,10 +2927,7 @@ namespace smt {
\brief Copy the quantifiers from qcandidates to new_qs that are not in m_satisfied.
*/
void copy_non_satisfied(ptr_vector<quantifier> const & qcandidates, ptr_vector<quantifier> & new_qs) {
ptr_vector<quantifier>::const_iterator it = qcandidates.begin();
ptr_vector<quantifier>::const_iterator end = qcandidates.end();
for (; it != end; ++it) {
quantifier * q = *it;
for (quantifier * q : qcandidates) {
if (!m_satisfied.contains(q))
new_qs.push_back(q);
}
@ -3085,11 +2938,9 @@ namespace smt {
quantifiers in m_satisfied.
*/
void set_interp() {
f2def::iterator it = m_fs.begin();
f2def::iterator end = m_fs.end();
for (; it != end; ++it) {
func_decl * f = (*it).m_key;
expr * def = (*it).m_value;
for (auto const& kv : m_fs) {
func_decl * f = kv.m_key;
expr * def = kv.m_value;
set_else_interp(f, def);
}
}
@ -3113,10 +2964,7 @@ namespace smt {
}
mk_q_f_defs(qcandidates);
TRACE("model_finder_hint", tout << "starting hint-solver search using:\n"; display_qcandidates(tout, qcandidates););
func_decl_set::iterator it = m_candidates.begin();
func_decl_set::iterator end = m_candidates.end();
for (; it != end; ++it) {
func_decl * f = *it;
for (func_decl * f : m_candidates) {
try {
process(f);
}
@ -3195,10 +3043,7 @@ namespace smt {
typedef std::pair<cond_macro *, quantifier *> mq_pair;
void collect_candidates(ptr_vector<quantifier> const & qs, obj_map<func_decl, mq_pair> & full_macros, func_decl_set & cond_macros) {
ptr_vector<quantifier>::const_iterator it = qs.begin();
ptr_vector<quantifier>::const_iterator end = qs.end();
for (; it != end; ++it) {
quantifier * q = *it;
for (quantifier * q : qs) {
quantifier_info * qi = get_qinfo(q);
quantifier_info::macro_iterator it2 = qi->begin_macros();
quantifier_info::macro_iterator end2 = qi->end_macros();
@ -3221,12 +3066,10 @@ namespace smt {
}
void process_full_macros(obj_map<func_decl, mq_pair> const & full_macros, obj_hashtable<quantifier> & removed) {
obj_map<func_decl, mq_pair>::iterator it = full_macros.begin();
obj_map<func_decl, mq_pair>::iterator end = full_macros.end();
for (; it != end; ++it) {
func_decl * f = (*it).m_key;
cond_macro * m = (*it).m_value.first;
quantifier * q = (*it).m_value.second;
for (auto const& kv : full_macros) {
func_decl * f = kv.m_key;
cond_macro * m = kv.m_value.first;
quantifier * q = kv.m_value.second;
SASSERT(m->is_unconditional());
if (add_macro(f, m->get_def())) {
get_qinfo(q)->set_the_one(f);
@ -3238,10 +3081,7 @@ namespace smt {
void process(func_decl * f, ptr_vector<quantifier> const & qs, obj_hashtable<quantifier> & removed) {
expr_ref fi_else(m_manager);
ptr_buffer<quantifier> to_remove;
ptr_vector<quantifier>::const_iterator it = qs.begin();
ptr_vector<quantifier>::const_iterator end = qs.end();
for (; it != end; ++it) {
quantifier * q = *it;
for (quantifier * q : qs) {
if (removed.contains(q))
continue;
cond_macro * m = get_macro_for(f, q);
@ -3259,20 +3099,16 @@ namespace smt {
}
}
if (fi_else.get() != 0 && add_macro(f, fi_else)) {
ptr_buffer<quantifier>::iterator it2 = to_remove.begin();
ptr_buffer<quantifier>::iterator end2 = to_remove.end();
for (; it2 != end2; ++it2) {
get_qinfo(*it2)->set_the_one(f);
removed.insert(*it2);
for (quantifier * q : to_remove) {
get_qinfo(q)->set_the_one(f);
removed.insert(q);
}
}
}
void process_cond_macros(func_decl_set const & cond_macros, ptr_vector<quantifier> const & qs, obj_hashtable<quantifier> & removed) {
func_decl_set::iterator it = cond_macros.begin();
func_decl_set::iterator end = cond_macros.end();
for (; it != end; ++it) {
process(*it, qs, removed);
for (func_decl * f : cond_macros) {
process(f, qs, removed);
}
}
@ -3287,10 +3123,7 @@ namespace smt {
process_full_macros(full_macros, removed);
process_cond_macros(cond_macros, qs, removed);
ptr_vector<quantifier>::const_iterator it = qs.begin();
ptr_vector<quantifier>::const_iterator end = qs.end();
for (; it != end; ++it) {
quantifier * q = *it;
for (quantifier * q : qs) {
if (removed.contains(q))
continue;
new_qs.push_back(q);
@ -3409,10 +3242,7 @@ namespace smt {
}
void model_finder::collect_relevant_quantifiers(ptr_vector<quantifier> & qs) const {
ptr_vector<quantifier>::const_iterator it = m_quantifiers.begin();
ptr_vector<quantifier>::const_iterator end = m_quantifiers.end();
for (; it != end; ++it) {
quantifier * q = *it;
for (quantifier * q : m_quantifiers) {
if (m_context->is_relevant(q) && m_context->get_assignment(q) == l_true)
qs.push_back(q);
}
@ -3422,26 +3252,19 @@ namespace smt {
m_auf_solver->reset();
m_auf_solver->set_model(m);
ptr_vector<quantifier>::const_iterator it = qs.begin();
ptr_vector<quantifier>::const_iterator end = qs.end();
for (; it != end; ++it) {
quantifier * q = *it;
for (quantifier * q : qs) {
quantifier_info * qi = get_quantifier_info(q);
qi->process_auf(*(m_auf_solver.get()), m_context);
}
m_auf_solver->mk_instantiation_sets();
it = qs.begin();
for (; it != end; ++it) {
quantifier * q = *it;
for (quantifier * q : qs) {
quantifier_info * qi = get_quantifier_info(q);
qi->populate_inst_sets(*(m_auf_solver.get()), m_context);
}
m_auf_solver->fix_model(m_new_constraints);
TRACE("model_finder",
ptr_vector<quantifier>::const_iterator it = qs.begin();
ptr_vector<quantifier>::const_iterator end = qs.end();
for (; it != end; ++it) {
quantifier * q = *it;
for (quantifier * q : qs) {
quantifier_info * qi = get_quantifier_info(q);
quantifier * fq = qi->get_flat_q();
tout << "#" << fq->get_id() << " ->\n" << mk_pp(fq, m_manager) << "\n";

5
src/smt/theory_fpa.cpp
View file

@ -237,8 +237,9 @@ namespace smt {
if (m_fpa_util.is_fp(e)) {
expr * cargs[3] = { to_app(e)->get_arg(0), to_app(e)->get_arg(1), to_app(e)->get_arg(2) };
res = m_bv_util.mk_concat(3, cargs);
m_th_rw((expr_ref&)res);
expr_ref tmp(m_bv_util.mk_concat(3, cargs), m);
m_th_rw(tmp);
res = to_app(tmp);
}
else {
sort * es = m.get_sort(e);

14
src/smt/theory_seq.cpp
View file

@ -427,7 +427,7 @@ bool theory_seq::branch_unit_variable() {
break;
}
}
CTRACE("seq", result, "branch unit variable";);
CTRACE("seq", result, tout << "branch unit variable";);
return result;
}
@ -3224,26 +3224,32 @@ void theory_seq::add_indexof_axiom(expr* i) {
/*
let r = replace(a, s, t)
a = "" => s = "" or r = a
contains(a, s) or r = a
s = "" => r = t+a
tightest_prefix(s, x)
(contains(a, s) -> r = xty & a = xsy) &
(!contains(a, s) -> r = a)
*/
void theory_seq::add_replace_axiom(expr* r) {
context& ctx = get_context();
expr* a = 0, *s = 0, *t = 0;
VERIFY(m_util.str.is_replace(r, a, s, t));
expr_ref x = mk_skolem(m_indexof_left, a, s);
expr_ref y = mk_skolem(m_indexof_right, a, s);
expr_ref xty = mk_concat(x, t, y);
expr_ref xsy = mk_concat(x, s, y);
literal a_emp = mk_eq_empty(a, true);
literal s_emp = mk_eq_empty(s, true);
literal cnt = mk_literal(m_util.str.mk_contains(a, s));
literal a_emp = mk_eq_empty(a);
literal s_emp = mk_eq_empty(s);
add_axiom(~a_emp, s_emp, mk_seq_eq(r, a));
add_axiom(cnt, mk_seq_eq(r, a));
add_axiom(~s_emp, mk_seq_eq(r, mk_concat(t, a)));
add_axiom(~cnt, a_emp, s_emp, mk_seq_eq(a, xsy));
add_axiom(~cnt, a_emp, s_emp, mk_seq_eq(r, xty));
ctx.force_phase(cnt);
tightest_prefix(s, x);
}
@ -3546,7 +3552,7 @@ bool theory_seq::get_length(expr* e, rational& val) const {
}
}
}
CTRACE("seq", !val.is_int(), "length is not an integer\n";);
CTRACE("seq", !val.is_int(), tout << "length is not an integer\n";);
return val.is_int();
}

85
src/smt/theory_str.cpp
View file

@ -185,6 +185,7 @@ namespace smt {
m_trail.push_back(e);
//TRACE("str", tout << "done asserting " << mk_ismt2_pp(e, get_manager()) << std::endl;);
}
expr * theory_str::rewrite_implication(expr * premise, expr * conclusion) {
@ -1449,6 +1450,7 @@ namespace smt {
argumentsValid_terms.push_back(m.mk_not(m_autil.mk_ge(
m_autil.mk_add(substrPos, m_autil.mk_mul(minusOne, substrLen)),
zero)));
// len >= 0
argumentsValid_terms.push_back(m_autil.mk_ge(substrLen, zero));
@ -1488,6 +1490,7 @@ namespace smt {
// Case 3: (pos >= 0 and pos < strlen(base) and len >= 0) and (pos+len) < strlen(base)
// ==> base = t2.t3.t4 AND len(t2) = pos AND len(t3) = len AND (Substr ...) = t3
expr_ref t2(mk_str_var("t2"), m);
expr_ref t3(mk_str_var("t3"), m);
expr_ref t4(mk_str_var("t4"), m);
@ -1509,6 +1512,86 @@ namespace smt {
assert_axiom(finalAxiom);
}
#if 0
// rewrite
// requires to add th_rewriter to assert_axiom to enforce normal form.
void theory_str::instantiate_axiom_Substr(enode * e) {
context & ctx = get_context();
ast_manager & m = get_manager();
expr* substrBase = 0;
expr* substrPos = 0;
expr* substrLen = 0;
app * expr = e->get_owner();
if (axiomatized_terms.contains(expr)) {
TRACE("str", tout << "already set up Substr axiom for " << mk_pp(expr, m) << std::endl;);
return;
}
axiomatized_terms.insert(expr);
TRACE("str", tout << "instantiate Substr axiom for " << mk_pp(expr, m) << std::endl;);
VERIFY(u.str.is_extract(expr, substrBase, substrPos, substrLen));
expr_ref zero(m_autil.mk_numeral(rational::zero(), true), m);
expr_ref minusOne(m_autil.mk_numeral(rational::minus_one(), true), m);
SASSERT(zero);
SASSERT(minusOne);
expr_ref_vector argumentsValid_terms(m);
// pos >= 0
argumentsValid_terms.push_back(m_autil.mk_ge(substrPos, zero));
// pos < strlen(base)
// --> pos + -1*strlen(base) < 0
argumentsValid_terms.push_back(m.mk_not(m_autil.mk_ge(
m_autil.mk_add(substrPos, m_autil.mk_mul(minusOne, substrLen)),
zero)));
// len >= 0
argumentsValid_terms.push_back(m_autil.mk_ge(substrLen, zero));
// (pos+len) >= strlen(base)
// --> pos + len + -1*strlen(base) >= 0
expr_ref lenOutOfBounds(m_autil.mk_ge(
m_autil.mk_add(substrPos, substrLen, m_autil.mk_mul(minusOne, mk_strlen(substrBase))),
zero), m);
expr_ref argumentsValid = mk_and(argumentsValid_terms);
// Case 1: pos < 0 or pos >= strlen(base) or len < 0
// ==> (Substr ...) = ""
expr_ref case1_premise(m.mk_not(argumentsValid), m);
expr_ref case1_conclusion(ctx.mk_eq_atom(expr, mk_string("")), m);
expr_ref case1(m.mk_implies(case1_premise, case1_conclusion), m);
// Case 2: (pos >= 0 and pos < strlen(base) and len >= 0) and (pos+len) >= strlen(base)
// ==> base = t0.t1 AND len(t0) = pos AND (Substr ...) = t1
expr_ref t0(mk_str_var("t0"), m);
expr_ref t1(mk_str_var("t1"), m);
expr_ref case2_conclusion(m.mk_and(
ctx.mk_eq_atom(substrBase, mk_concat(t0,t1)),
ctx.mk_eq_atom(mk_strlen(t0), substrPos),
ctx.mk_eq_atom(expr, t1)), m);
expr_ref case2(m.mk_implies(m.mk_and(argumentsValid, lenOutOfBounds), case2_conclusion), m);
// Case 3: (pos >= 0 and pos < strlen(base) and len >= 0) and (pos+len) < strlen(base)
// ==> base = t2.t3.t4 AND len(t2) = pos AND len(t3) = len AND (Substr ...) = t3
expr_ref t2(mk_str_var("t2"), m);
expr_ref t3(mk_str_var("t3"), m);
expr_ref t4(mk_str_var("t4"), m);
expr_ref_vector case3_conclusion_terms(m);
case3_conclusion_terms.push_back(ctx.mk_eq_atom(substrBase, mk_concat(t2, mk_concat(t3, t4))));
case3_conclusion_terms.push_back(ctx.mk_eq_atom(mk_strlen(t2), substrPos));
case3_conclusion_terms.push_back(ctx.mk_eq_atom(mk_strlen(t3), substrLen));
case3_conclusion_terms.push_back(ctx.mk_eq_atom(expr, t3));
expr_ref case3_conclusion(mk_and(case3_conclusion_terms), m);
expr_ref case3(m.mk_implies(m.mk_and(argumentsValid, m.mk_not(lenOutOfBounds)), case3_conclusion), m);
assert_axiom(case1);
assert_axiom(case2);
assert_axiom(case3);
}
#endif
void theory_str::instantiate_axiom_Replace(enode * e) {
context & ctx = get_context();
ast_manager & m = get_manager();
@ -8484,7 +8567,7 @@ namespace smt {
} else {
TRACE("str", tout << "integer theory has no assignment for " << mk_pp(a, m) << std::endl;);
expr_ref is_zero(ctx.mk_eq_atom(a, m_autil.mk_int(0)), m);
literal is_zero_l = mk_literal(is_zero);
/* literal is_zero_l = */ mk_literal(is_zero);
axiomAdd = true;
TRACE("str", ctx.display(tout););
// NOT_IMPLEMENTED_YET();