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working on horn difference logic

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2013-04-21 18:17:49 -07:00
parent 17f0377c06
commit 0fbdd37e89
13 changed files with 105 additions and 41 deletions
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60
src/muz_qe/dl_mk_loop_counter.cpp
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@ -32,7 +32,7 @@ namespace datalog {
mk_loop_counter::~mk_loop_counter() { }
app_ref mk_loop_counter::add_arg(app* fn, unsigned idx) {
app_ref mk_loop_counter::add_arg(rule_set const& src, rule_set& dst, app* fn, unsigned idx) {
expr_ref_vector args(m);
func_decl* new_fn, *old_fn = fn->get_decl();
args.append(fn->get_num_args(), fn->get_args());
@ -46,17 +46,29 @@ namespace datalog {
m_old2new.insert(old_fn, new_fn);
m_new2old.insert(new_fn, old_fn);
m_refs.push_back(new_fn);
m_ctx.register_predicate(new_fn, false);
if (src.is_output_predicate(old_fn)) {
dst.set_output_predicate(new_fn);
}
}
return app_ref(m.mk_app(new_fn, args.size(), args.c_ptr()), m);
}
app_ref mk_loop_counter::del_arg(app* fn) {
expr_ref_vector args(m);
func_decl* old_fn, *new_fn = fn->get_decl();
SASSERT(fn->get_num_args() > 0);
args.append(fn->get_num_args()-1, fn->get_args());
VERIFY (m_new2old.find(new_fn, old_fn));
return app_ref(m.mk_app(old_fn, args.size(), args.c_ptr()), m);
}
rule_set * mk_loop_counter::operator()(rule_set const & source) {
m_refs.reset();
m_old2new.reset();
m_new2old.reset();
context& ctx = source.get_context();
rule_manager& rm = source.get_rule_manager();
rule_set * result = alloc(rule_set, ctx);
rule_set * result = alloc(rule_set, m_ctx);
unsigned sz = source.get_num_rules();
rule_ref new_rule(rm);
app_ref_vector tail(m);
@ -71,16 +83,14 @@ namespace datalog {
unsigned utsz = r.get_uninterpreted_tail_size();
unsigned tsz = r.get_tail_size();
for (unsigned j = 0; j < utsz; ++j, ++cnt) {
tail.push_back(add_arg(r.get_tail(j), cnt));
tail.push_back(add_arg(source, *result, r.get_tail(j), cnt));
neg.push_back(r.is_neg_tail(j));
m_ctx.register_predicate(tail.back()->get_decl(), false);
}
for (unsigned j = utsz; j < tsz; ++j) {
tail.push_back(r.get_tail(j));
neg.push_back(false);
}
head = add_arg(r.get_head(), cnt);
m_ctx.register_predicate(head->get_decl(), false);
head = add_arg(source, *result, r.get_head(), cnt);
// set the loop counter to be an increment of the previous
bool found = false;
unsigned last = head->get_num_args()-1;
@ -108,9 +118,41 @@ namespace datalog {
// model converter: remove references to extra argument.
// proof converter: remove references to extra argument as well.
result->inherit_predicates(source);
return result;
}
rule_set * mk_loop_counter::revert(rule_set const & source) {
context& ctx = source.get_context();
rule_manager& rm = source.get_rule_manager();
rule_set * result = alloc(rule_set, ctx);
unsigned sz = source.get_num_rules();
rule_ref new_rule(rm);
app_ref_vector tail(m);
app_ref head(m);
svector<bool> neg;
for (unsigned i = 0; i < sz; ++i) {
tail.reset();
neg.reset();
rule & r = *source.get_rule(i);
unsigned utsz = r.get_uninterpreted_tail_size();
unsigned tsz = r.get_tail_size();
for (unsigned j = 0; j < utsz; ++j) {
tail.push_back(del_arg(r.get_tail(j)));
neg.push_back(r.is_neg_tail(j));
}
for (unsigned j = utsz; j < tsz; ++j) {
tail.push_back(r.get_tail(j));
neg.push_back(false);
}
head = del_arg(r.get_head());
new_rule = rm.mk(head, tail.size(), tail.c_ptr(), neg.c_ptr(), r.name(), true);
result->add_rule(new_rule);
}
// model converter: ...
// proof converter: ...
return result;
}
};