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https://github.com/Z3Prover/z3
synced 2025-04-05 17:14:07 +00:00
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2308d8af09
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@ -51,11 +51,10 @@ bv2fpa_converter::bv2fpa_converter(ast_manager & m, fpa2bv_converter & conv) :
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for (auto const& kv : conv.m_uf2bvuf) {
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m_uf2bvuf.insert(kv.m_key, kv.m_value);
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m.inc_ref(kv.m_key);
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m.inc_ref(kv.m_value.first);
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m.inc_ref(kv.m_value.second);
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m.inc_ref(kv.m_value);
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}
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for (auto const& kv : conv.m_min_max_ufs) {
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m_specials.insert(kv.m_key, kv.m_value);
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m_min_max_specials.insert(kv.m_key, kv.m_value);
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m.inc_ref(kv.m_key);
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m.inc_ref(kv.m_value.first);
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m.inc_ref(kv.m_value.second);
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@ -67,16 +66,15 @@ bv2fpa_converter::~bv2fpa_converter() {
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dec_ref_map_key_values(m, m_rm_const2bv);
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for (auto const& kv : m_uf2bvuf) {
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m.dec_ref(kv.m_key);
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m.dec_ref(kv.m_value.first);
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m.dec_ref(kv.m_value.second);
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m.dec_ref(kv.m_value);
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}
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for (auto const& kv : m_specials) {
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for (auto const& kv : m_min_max_specials) {
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m.dec_ref(kv.m_key);
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m.dec_ref(kv.m_value.first);
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m.dec_ref(kv.m_value.second);
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}
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m_uf2bvuf.reset();
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m_specials.reset();
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m_min_max_specials.reset();
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}
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expr_ref bv2fpa_converter::convert_bv2fp(sort * s, expr * sgn, expr * exp, expr * sig) {
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@ -191,7 +189,7 @@ expr_ref bv2fpa_converter::convert_bv2rm(model_core * mc, expr * val) {
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expr_ref bv2fpa_converter::rebuild_floats(model_core * mc, sort * s, expr * e) {
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expr_ref result(m);
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TRACE("bv2fpa", tout << "rebuild floats in " << mk_ismt2_pp(s, m) << " for ";
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TRACE("bv2fpa_rebuild", tout << "rebuild floats in " << mk_ismt2_pp(s, m) << " for ";
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if (e) tout << mk_ismt2_pp(e, m);
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else tout << "nil";
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tout << std::endl; );
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@ -288,13 +286,23 @@ func_interp * bv2fpa_converter::convert_func_interp(model_core * mc, func_decl *
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expr_ref ft_fres = rebuild_floats(mc, rng, to_app(bv_fres));
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m_th_rw(ft_fres);
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TRACE("bv2fpa",
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tout << "func_interp entry #" << i << ":" << std::endl;
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tout << "(" << bv_f->get_name();
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for (unsigned i = 0; i < bv_f->get_arity(); i++)
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tout << " " << mk_ismt2_pp(bv_args[i], m);
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tout << ") = " << mk_ismt2_pp(bv_fres, m) << std::endl;
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tout << " --> " << std::endl;
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tout << "(" << f->get_name();
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for (unsigned i = 0; i < new_args.size(); i++)
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tout << mk_ismt2_pp(bv_args[i], m) << " == " <<
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mk_ismt2_pp(new_args[i], m) << std::endl;
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tout << mk_ismt2_pp(bv_fres, m) << " == " << mk_ismt2_pp(ft_fres, m) << std::endl;);
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tout << " " << mk_ismt2_pp(new_args[i], m);
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tout << ") = " << mk_ismt2_pp(ft_fres, m) << std::endl;);
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func_entry * fe = result->get_entry(new_args.c_ptr());
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if (fe == nullptr)
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result->insert_new_entry(new_args.c_ptr(), ft_fres);
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if (fe == nullptr) {
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// Avoid over-specification of a partially interpreted theory function
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if (f->get_family_id() != m_fpa_util.get_family_id() ||
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m_fpa_util.is_considered_uninterpreted(f, new_args.size(), new_args.c_ptr()))
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result->insert_new_entry(new_args.c_ptr(), ft_fres);
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}
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else {
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// The BV model may have multiple equivalent entries using different
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// representations of NaN. We can only keep one and we check that
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@ -309,6 +317,7 @@ func_interp * bv2fpa_converter::convert_func_interp(model_core * mc, func_decl *
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if (bv_els) {
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expr_ref ft_els = rebuild_floats(mc, rng, bv_els);
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m_th_rw(ft_els);
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TRACE("bv2fpa", tout << "else=" << mk_ismt2_pp(ft_els, m) << std::endl;);
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result->set_else(ft_els);
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}
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}
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@ -398,7 +407,7 @@ void bv2fpa_converter::convert_rm_consts(model_core * mc, model_core * target_mo
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}
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void bv2fpa_converter::convert_min_max_specials(model_core * mc, model_core * target_model, obj_hashtable<func_decl> & seen) {
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for (auto const& kv : m_specials) {
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for (auto const& kv : m_min_max_specials) {
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func_decl * f = kv.m_key;
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app * pn_cnst = kv.m_value.first;
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app * np_cnst = kv.m_value.second;
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@ -432,8 +441,7 @@ void bv2fpa_converter::convert_min_max_specials(model_core * mc, model_core * ta
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void bv2fpa_converter::convert_uf2bvuf(model_core * mc, model_core * target_model, obj_hashtable<func_decl> & seen) {
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for (auto const& kv : m_uf2bvuf) {
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func_decl * f = kv.m_key;
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func_decl* f_uf = kv.m_value.first;
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expr* f_def = kv.m_value.second;
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func_decl * f_uf = kv.m_value;
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seen.insert(f_uf);
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if (f->get_arity() == 0)
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@ -454,29 +462,22 @@ void bv2fpa_converter::convert_uf2bvuf(model_core * mc, model_core * target_mode
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}
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}
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else if (f->get_family_id() == m_fpa_util.get_fid()) {
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if (f_def) {
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func_interp* fi = alloc(func_interp, m, f->get_arity());
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expr_ref def = rebuild_floats(mc, f->get_range(), to_app(f_def));
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fi->set_else(def);
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SASSERT(m.get_sort(def) == f->get_range());
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target_model->register_decl(f, fi);
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func_interp* fj = mc->get_func_interp(f_uf);
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if (fj) {
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target_model->register_decl(f_uf, fj->copy());
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}
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continue;
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}
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// kv.m_value contains the model for the unspecified cases of kv.m_key in terms of bit-vectors.
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// convert_func_interp rebuilds a func_interp on floats.
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// f is a floating point function: f(x,y) : Float
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// f_uf is a bit-vector function: f_uf(xB,yB) : BitVec
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// then there is f_def: f_Bv(xB, yB) := if(range(xB),.., f_uf(xB,yB))
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// f(x,y) := to_float(if(range(to_bv(x)), ... f_uf(to_bv(xB), to_bv(yB)))) - not practical
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// := if(range_fp(x), ...., to_float(f_uf(...)) - approach
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target_model->register_decl(f, convert_func_interp(mc, f, f_uf));
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// := if(range_fp(x), ...., to_float(f_uf(...)) - approach (via fpa_util::is_considered_uninterpreted)
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func_interp *fi = convert_func_interp(mc, f, f_uf);
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if (fi->num_entries() > 0 || fi->get_else() != nullptr)
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target_model->register_decl(f, fi);
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}
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}
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TRACE("bv2fpa", tout << "Target model: " << *target_model; );
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}
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void bv2fpa_converter::display(std::ostream & out) {
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@ -496,9 +497,9 @@ void bv2fpa_converter::display(std::ostream & out) {
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const symbol & n = kv.m_key->get_name();
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out << "\n (" << n << " ";
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unsigned indent = n.size() + 4;
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out << mk_ismt2_pp(kv.m_value.first, m, indent) << ")";
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out << mk_ismt2_pp(kv.m_value, m, indent) << ")";
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}
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for (auto const& kv : m_specials) {
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for (auto const& kv : m_min_max_specials) {
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const symbol & n = kv.m_key->get_name();
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out << "\n (" << n << " ";
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unsigned indent = n.size() + 4;
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@ -525,22 +526,19 @@ bv2fpa_converter * bv2fpa_converter::translate(ast_translation & translator) {
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}
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for (auto const& kv : m_uf2bvuf) {
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func_decl * k = translator(kv.m_key);
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func_decl * v = translator(kv.m_value.first);
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expr* d = translator(kv.m_value.second);
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res->m_uf2bvuf.insert(k, std::make_pair(v, d));
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func_decl * v = translator(kv.m_value);
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res->m_uf2bvuf.insert(k, v);
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translator.to().inc_ref(k);
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translator.to().inc_ref(v);
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translator.to().inc_ref(d);
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}
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for (auto const& kv : m_specials) {
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for (auto const& kv : m_min_max_specials) {
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func_decl * k = translator(kv.m_key);
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app * v1 = translator(kv.m_value.first);
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app * v2 = translator(kv.m_value.second);
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res->m_specials.insert(k, std::pair<app*, app*>(v1, v2));
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res->m_min_max_specials.insert(k, std::pair<app*, app*>(v1, v2));
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translator.to().inc_ref(k);
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translator.to().inc_ref(v1);
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translator.to().inc_ref(v2);
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}
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return res;
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}
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@ -34,8 +34,8 @@ class bv2fpa_converter {
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obj_map<func_decl, expr*> m_const2bv;
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obj_map<func_decl, expr*> m_rm_const2bv;
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obj_map<func_decl, std::pair<func_decl*, expr*>> m_uf2bvuf;
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obj_map<func_decl, std::pair<app*, app*> > m_specials;
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obj_map<func_decl, func_decl*> m_uf2bvuf;
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obj_map<func_decl, std::pair<app*, app*> > m_min_max_specials;
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public:
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bv2fpa_converter(ast_manager & m);
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@ -3203,7 +3203,6 @@ void fpa2bv_converter::mk_to_bv(func_decl * f, unsigned num, expr * const * args
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expr_ref sgn(m), sig(m), exp(m), lz(m);
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unpack(x, sgn, sig, exp, lz, true);
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unsigned ebits = m_util.get_ebits(xs);
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unsigned sbits = m_util.get_sbits(xs);
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@ -4166,8 +4165,7 @@ void fpa2bv_converter::reset() {
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dec_ref_map_key_values(m, m_rm_const2bv);
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for (auto const& kv : m_uf2bvuf) {
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m.dec_ref(kv.m_key);
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m.dec_ref(kv.m_value.first);
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m.dec_ref(kv.m_value.second);
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m.dec_ref(kv.m_value);
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}
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for (auto const& kv : m_min_max_ufs) {
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m.dec_ref(kv.m_key);
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@ -4180,36 +4178,13 @@ void fpa2bv_converter::reset() {
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}
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func_decl * fpa2bv_converter::mk_bv_uf(func_decl * f, sort * const * domain, sort * range) {
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std::pair<func_decl*, expr*> res;
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func_decl* res;
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if (!m_uf2bvuf.find(f, res)) {
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res.first = m.mk_fresh_func_decl(nullptr, f->get_arity(), domain, range);
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res.second = nullptr;
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res = m.mk_fresh_func_decl(nullptr, f->get_arity(), domain, range);
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m.inc_ref(f);
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m.inc_ref(res.first);
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m.inc_ref(res);
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m_uf2bvuf.insert(f, res);
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TRACE("fpa2bv", tout << "New UF func_decl: " << res.first->get_id() << std::endl << mk_ismt2_pp(res.first, m) << std::endl;);
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TRACE("fpa2bv", tout << "New UF func_decl: " << res->get_id() << std::endl << mk_ismt2_pp(res, m) << std::endl;);
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}
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return res.first;
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}
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expr* fpa2bv_converter::get_bv_def(func_decl* f) {
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std::pair<func_decl*, expr*> res(nullptr, nullptr);
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m_uf2bvuf.find(f, res);
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TRACE("fpa2bv", tout << "get_bv_def " << mk_ismt2_pp(res.first, m) << " " << res.second << std::endl;);
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return res.second;
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}
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/**
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\brief expand the definition of bit-vector function f
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as an expression of what is defined and what is not
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defined.
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*/
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void fpa2bv_converter::set_bv_def(func_decl* f, expr* def) {
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auto res = m_uf2bvuf[f];
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SASSERT(res.first);
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SASSERT(!res.second);
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res.second = def;
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m.inc_ref(def);
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m_uf2bvuf.insert(f, res);
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return res;
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}
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@ -35,7 +35,7 @@ class fpa2bv_converter {
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public:
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typedef obj_map<func_decl, std::pair<app *, app *> > special_t;
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typedef obj_map<func_decl, expr*> const2bv_t;
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typedef obj_map<func_decl, std::pair<func_decl*, expr*> > uf2bvuf_t;
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typedef obj_map<func_decl, func_decl*> uf2bvuf_t;
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protected:
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ast_manager & m;
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@ -219,8 +219,6 @@ private:
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void mk_to_fp_float(sort * s, expr * rm, expr * x, expr_ref & result);
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func_decl * mk_bv_uf(func_decl * f, sort * const * domain, sort * range);
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void set_bv_def(func_decl * f, expr* def);
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expr* get_bv_def(func_decl * f);
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expr_ref nan_wrap(expr * n);
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@ -19,6 +19,7 @@ Revision History:
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#include "ast/fpa_decl_plugin.h"
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#include "ast/arith_decl_plugin.h"
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#include "ast/bv_decl_plugin.h"
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#include "ast/ast_smt2_pp.h"
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fpa_decl_plugin::fpa_decl_plugin():
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m_values(m_fm),
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@ -68,6 +69,10 @@ void fpa_decl_plugin::recycled_id(unsigned id) {
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m_fm.del(m_values[id]);
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}
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bool fpa_decl_plugin::is_considered_uninterpreted(func_decl * f) {
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return false;
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}
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func_decl * fpa_decl_plugin::mk_numeral_decl(mpf const & v) {
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sort * s = mk_float_sort(v.get_ebits(), v.get_sbits());
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func_decl * r = nullptr;
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@ -1044,3 +1049,44 @@ bool fpa_util::contains_floats(ast * a) {
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return false;
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}
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bool fpa_util::is_considered_uninterpreted(func_decl * f, unsigned n, expr* const* args) {
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TRACE("fpa_util", expr_ref t(m().mk_app(f, n, args), m()); tout << mk_ismt2_pp(t, m()) << std::endl; );
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family_id ffid = plugin().get_family_id();
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if (f->get_family_id() != ffid)
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return false;
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if (is_decl_of(f, ffid, OP_FPA_TO_IEEE_BV)) {
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SASSERT(n == 1);
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expr* x = args[0];
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return is_nan(x);
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}
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else if (is_decl_of(f, ffid, OP_FPA_TO_SBV) ||
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is_decl_of(f, ffid, OP_FPA_TO_UBV)) {
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SASSERT(n == 2);
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SASSERT(f->get_num_parameters() == 1);
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bool is_signed = f->get_decl_kind() == OP_FPA_TO_SBV;
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expr* rm = args[0];
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expr* x = args[1];
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unsigned bv_sz = f->get_parameter(0).get_int();
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mpf_rounding_mode rmv;
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mpf v;
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if (!is_rm_numeral(rm, rmv) || !is_numeral(x, v)) return false;
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if (is_nan(x) || is_inf(x)) return true;
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unsynch_mpq_manager& mpqm = plugin().fm().mpq_manager();
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scoped_mpq r(mpqm);
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plugin().fm().to_sbv_mpq(rmv, v, r);
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if (is_signed)
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return mpqm.bitsize(r) >= bv_sz;
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else
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return mpqm.is_neg(r) || mpqm.bitsize(r) > bv_sz;
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}
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else if (is_decl_of(f, ffid, OP_FPA_TO_REAL)) {
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SASSERT(n == 1);
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expr* x = args[0];
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return is_nan(x) || is_inf(x);
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}
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return plugin().is_considered_uninterpreted(f);
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}
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@ -163,8 +163,6 @@ class fpa_decl_plugin : public decl_plugin {
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unsigned mk_id(mpf const & v);
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void recycled_id(unsigned id);
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bool is_considered_uninterpreted(func_decl * f) override { return false; }
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public:
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fpa_decl_plugin();
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@ -199,6 +197,8 @@ public:
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void del(parameter const & p) override;
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parameter translate(parameter const & p, decl_plugin & target) override;
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bool is_considered_uninterpreted(func_decl * f) override;
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};
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class fpa_util {
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@ -358,6 +358,8 @@ public:
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bool contains_floats(ast * a);
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bool is_considered_uninterpreted(func_decl* f, unsigned n, expr* const* args);
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MATCH_TERNARY(is_fp);
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};
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@ -53,6 +53,7 @@ struct evaluator_cfg : public default_rewriter_cfg {
|
|||
seq_rewriter m_seq_rw;
|
||||
array_util m_ar;
|
||||
arith_util m_au;
|
||||
fpa_util m_fpau;
|
||||
unsigned long long m_max_memory;
|
||||
unsigned m_max_steps;
|
||||
bool m_model_completion;
|
||||
|
@ -78,6 +79,7 @@ struct evaluator_cfg : public default_rewriter_cfg {
|
|||
m_seq_rw(m),
|
||||
m_ar(m),
|
||||
m_au(m),
|
||||
m_fpau(m),
|
||||
m_pinned(m) {
|
||||
bool flat = true;
|
||||
m_b_rw.set_flat(flat);
|
||||
|
@ -132,9 +134,9 @@ struct evaluator_cfg : public default_rewriter_cfg {
|
|||
return false;
|
||||
}
|
||||
|
||||
bool reduce_quantifier(quantifier * old_q,
|
||||
expr * new_body,
|
||||
expr * const * new_patterns,
|
||||
bool reduce_quantifier(quantifier * old_q,
|
||||
expr * new_body,
|
||||
expr * const * new_patterns,
|
||||
expr * const * new_no_patterns,
|
||||
expr_ref & result,
|
||||
proof_ref & result_pr) {
|
||||
|
@ -148,7 +150,7 @@ struct evaluator_cfg : public default_rewriter_cfg {
|
|||
family_id fid = f->get_family_id();
|
||||
bool is_uninterp = fid != null_family_id && m.get_plugin(fid)->is_considered_uninterpreted(f);
|
||||
br_status st = BR_FAILED;
|
||||
TRACE("model_evaluator", tout << f->get_name() << " " << is_uninterp << "\n";);
|
||||
TRACE("model_evaluator", tout << f->get_name() << " " << is_uninterp << "\n";);
|
||||
if (num == 0 && (fid == null_family_id || is_uninterp)) { // || m_ar.is_as_array(f)
|
||||
expr * val = m_model.get_const_interp(f);
|
||||
if (val != nullptr) {
|
||||
|
@ -195,8 +197,8 @@ struct evaluator_cfg : public default_rewriter_cfg {
|
|||
result = m.mk_false();
|
||||
st = BR_DONE;
|
||||
}
|
||||
TRACE("model_evaluator",
|
||||
tout << st << " " << mk_pp(s, m) << " " << s_fid << " " << m_ar_rw.get_fid() << " "
|
||||
TRACE("model_evaluator",
|
||||
tout << st << " " << mk_pp(s, m) << " " << s_fid << " " << m_ar_rw.get_fid() << " "
|
||||
<< mk_pp(args[0], m) << " " << mk_pp(args[1], m) << " " << result << "\n";);
|
||||
if (st != BR_FAILED)
|
||||
return st;
|
||||
|
@ -324,7 +326,14 @@ struct evaluator_cfg : public default_rewriter_cfg {
|
|||
result = nullptr;
|
||||
result_pr = nullptr;
|
||||
|
||||
if (f->get_family_id() == m_fpau.get_family_id() &&
|
||||
!m_fpau.is_considered_uninterpreted(f, num, args)) {
|
||||
// cwinter: should this be unreachable?
|
||||
return BR_FAILED;
|
||||
}
|
||||
|
||||
func_interp * fi = m_model.get_func_interp(f);
|
||||
|
||||
if (fi) {
|
||||
if (fi->is_partial())
|
||||
fi->set_else(m.get_some_value(f->get_range()));
|
||||
|
@ -338,6 +347,10 @@ struct evaluator_cfg : public default_rewriter_cfg {
|
|||
result = m_au.mk_numeral(rational(0), f->get_range());
|
||||
return BR_DONE;
|
||||
}
|
||||
else if (m_fpau.is_considered_uninterpreted(f, num, args)) {
|
||||
result = m.get_some_value(f->get_range());
|
||||
return BR_DONE;
|
||||
}
|
||||
return BR_FAILED;
|
||||
}
|
||||
|
||||
|
@ -524,7 +537,7 @@ struct evaluator_cfg : public default_rewriter_cfg {
|
|||
|
||||
func_decl* f = m_ar.get_as_array_func_decl(to_app(a));
|
||||
func_interp* g = m_model.get_func_interp(f);
|
||||
if (!g) return false;
|
||||
if (!g) return false;
|
||||
else_case = g->get_else();
|
||||
if (!else_case) {
|
||||
TRACE("model_evaluator", tout << "no else case " << mk_pp(a, m) << "\n";);
|
||||
|
|
Loading…
Reference in a new issue