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fix #4870

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Nikolaj Bjorner 2020-12-07 17:52:56 -08:00
parent 9f6a0a868a
commit 430b4ea252
1 changed files with 31 additions and 24 deletions
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55
src/muz/rel/dl_mk_simple_joins.cpp
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@ -20,10 +20,10 @@ Revision History:
#include<utility>
#include<sstream>
#include<limits>
#include "muz/rel/dl_mk_simple_joins.h"
#include "muz/rel/dl_relation_manager.h"
#include "ast/ast_pp.h"
#include "util/trace.h"
#include "muz/rel/dl_mk_simple_joins.h"
#include "muz/rel/dl_relation_manager.h"
namespace datalog {
@ -47,14 +47,14 @@ namespace datalog {
being notified about it, it will surely see the decrease from length 3 to 2 which
the threshold for rule being counted in this counter.
*/
unsigned m_consumers;
bool m_stratified;
unsigned m_src_stratum;
unsigned m_consumers { 0 };
bool m_stratified { true };
unsigned m_src_stratum { 0 };
public:
var_idx_set m_all_nonlocal_vars;
rule_vector m_rules;
pair_info() : m_consumers(0), m_stratified(true), m_src_stratum(0) {}
pair_info() {}
bool can_be_joined() const {
return m_consumers > 0;
@ -246,7 +246,7 @@ namespace datalog {
m_pinned.push_back(t1n);
m_pinned.push_back(t2n);
TRACE("dl", tout << mk_pp(t1, m) << " " << mk_pp(t2, m) << " |-> " << t1n_ref << " " << t2n_ref << "\n";);
TRACE("dl_verbose", tout << mk_pp(t1, m) << " " << mk_pp(t2, m) << " |-> " << t1n_ref << " " << t2n_ref << "\n";);
return app_pair(t1n, t2n);
}
@ -411,7 +411,7 @@ namespace datalog {
void replace_edges(rule * r, const app_ref_vector & removed_tails,
const app_ref_vector & added_tails0, const ptr_vector<app> & rule_content) {
SASSERT(removed_tails.size()>=added_tails0.size());
SASSERT(removed_tails.size() >= added_tails0.size());
unsigned len = rule_content.size();
unsigned original_len = len+removed_tails.size()-added_tails0.size();
app_ref_vector added_tails(added_tails0); //we need a copy since we'll be modifying it
@ -555,14 +555,27 @@ namespace datalog {
TRACE("dl", tout << mk_pp(rt2, m) << " " << mk_pp(rt1, m) << " -> " << new_transf << "\n";);
}
app * new_lit = to_app(new_transf);
m_pinned.push_back(new_lit);
rule_content[i1] = new_lit;
rule_content[i2] = rule_content.back();
rule_content.pop_back();
len--; //here the bound of both loops changes!!!
removed_tails.push_back(rt1);
removed_tails.push_back(rt2);
added_tails.push_back(new_lit);
if (added_tails.contains(new_lit)) {
if (i1 < rule_content.size())
rule_content[i1] = rule_content.back();
rule_content.pop_back();
if (i2 < rule_content.size())
rule_content[i2] = rule_content.back();
rule_content.pop_back();
len -= 2;
removed_tails.push_back(rt1);
removed_tails.push_back(rt2);
}
else {
m_pinned.push_back(new_lit);
rule_content[i1] = new_lit;
rule_content[i2] = rule_content.back();
rule_content.pop_back();
len--; //here the bound of both loops changes!!!
removed_tails.push_back(rt1);
removed_tails.push_back(rt2);
added_tails.push_back(new_lit);
}
// this exits the inner loop, the outer one continues in case there will
// be other matches
break;
@ -657,10 +670,8 @@ namespace datalog {
bool pick_best_pair(app_pair & p) {
app_pair best;
bool found = false;
cost best_cost;
for (auto const& kv : m_costs) {
app_pair key = kv.m_key;
pair_info & inf = *kv.m_value;
@ -671,14 +682,10 @@ namespace datalog {
if (!found || c < best_cost) {
found = true;
best_cost = c;
best = key;
p = key;
}
}
if (!found) {
return false;
}
p = best;
return true;
return found;
}