mirrors/z3
3
0
Fork 0
mirror of https://github.com/Z3Prover/z3 synced 2025-08-05 02:40:24 +00:00
Code Activity

add rule unfolding transformation

Browse source 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2012-10-15 15:34:29 -07:00
parent 2c24f25050
commit d16db63e56
13 changed files with 160 additions and 138 deletions
Download patch file Download diff file Expand all files Collapse all files

72
lib/dl_mk_unfold.cpp Normal file
View file

@ -0,0 +1,72 @@
/*++
Copyright (c) 2012 Microsoft Corporation
Module Name:
dl_mk_unfold.cpp
Abstract:
Unfold rules once, return the unfolded set of rules.
Author:
Nikolaj Bjorner (nbjorner) 2012-10-15
Revision History:
--*/
#include "dl_mk_unfold.h"
namespace datalog {
mk_unfold::mk_unfold(context& ctx):
rule_transformer::plugin(0, false),
m_ctx(ctx),
m(ctx.get_manager()),
rm(ctx.get_rule_manager()),
m_unify(ctx)
{}
void mk_unfold::expand_tail(rule& r, unsigned tail_idx, rule_set const& src, rule_set& dst) {
SASSERT(tail_idx <= r.get_uninterpreted_tail_size());
if (tail_idx == r.get_uninterpreted_tail_size()) {
dst.add_rule(&r);
}
else {
func_decl* p = r.get_decl(tail_idx);
rule_vector const& p_rules = src.get_predicate_rules(p);
rule_ref new_rule(rm);
for (unsigned i = 0; i < p_rules.size(); ++i) {
rule const& r2 = *p_rules[i];
if (m_unify.unify_rules(r, tail_idx, r2) &&
m_unify.apply(r, tail_idx, r2, new_rule)) {
expr_ref_vector s1 = m_unify.get_rule_subst(r, true);
expr_ref_vector s2 = m_unify.get_rule_subst(r2, false);
resolve_rule(m_pc, r, r2, tail_idx, s1, s2, *new_rule.get());
expand_tail(*new_rule.get(), tail_idx+r2.get_uninterpreted_tail_size(), src, dst);
}
}
}
}
rule_set * mk_unfold::operator()(rule_set const & source, model_converter_ref& mc, proof_converter_ref& pc) {
m_pc = 0;
ref<replace_proof_converter> rpc;
if (pc) {
rpc = alloc(replace_proof_converter, m);
m_pc = rpc.get();
}
rule_set* rules = alloc(rule_set, m_ctx);
rule_set::iterator it = source.begin(), end = source.end();
for (; it != end; ++it) {
expand_tail(**it, 0, source, *rules);
}
if (pc) {
pc = concat(pc.get(), rpc.get());
}
return rules;
}
};