diff --git a/.vscode/launch.json b/.vscode/launch.json
index f331369..37924da 100644
--- a/.vscode/launch.json
+++ b/.vscode/launch.json
@@ -11,7 +11,7 @@
             "program": "${workspaceFolder}/atpg",
             "args": ["${workspaceFolder}/benchmark/c432.bench"],
             "stopAtEntry": false,
-            "cwd": "${fileDirname}",
+            "cwd": "${workspaceFolder}",
             "environment": [],
             "externalConsole": false,
             "MIMode": "gdb",
diff --git a/atpg b/atpg
index 23be6d0..8420a80 100755
Binary files a/atpg and b/atpg differ
diff --git a/circuit.cpp b/circuit.cpp
index ceb9575..fb94fc1 100644
--- a/circuit.cpp
+++ b/circuit.cpp
@@ -76,8 +76,6 @@ bool Circuit::is_valid_circuit() {
 
     ll fault_propagate_score = 0;
 
-    //printf("flip: %d, stem: %d, fault:%d\n", flip_total_weight, stem_total_weight, fault_total_weight);
-
     for(Gate* g : gates) {
 
         if(g->propagate != (g->fault_detected[0] || g->fault_detected[1])) {
diff --git a/crun b/crun
index 32099a5..12b724c 100755
--- a/crun
+++ b/crun
@@ -8,6 +8,6 @@ if [ $? -ne 0 ]; then
     echo "compile failed."
 else
     echo "========================"
-    time ./atpg $1 2>&1 | tee output.txt
+    time ./atpg $1
 fi
 
diff --git a/ls.cpp b/ls.cpp
index 5a25f88..7dfdadb 100644
--- a/ls.cpp
+++ b/ls.cpp
@@ -12,6 +12,8 @@
 
 bool Circuit::local_search() {
 
+    //printf("[start ls]\n");
+
     ls_reset_data();
 
     ls_init_stems();
@@ -22,15 +24,29 @@ bool Circuit::local_search() {
 
     ls_random_circuit();
 
+    //printf("stem-cnt: %d\n", stem_total_cnt);
+
     for(int i=0; i<MAX_STEPS; i++) {
 
         auto start = std::chrono::system_clock::now();
         
         //printf("[FLIP] stem: %lld, fault:%lld, stem_cnt: %lld, fault_cnt:%lld, fpl_score: %lld citcuit-score: %lld\n", stem_total_cost, fault_total_weight, stems.size() - stem_total_cnt, fault_total_cnt, fault_propagate_score, ls_circuit_score());
 
-        int id = ls_pick();        
+        int id;
+
+
+        double p = 0.8;
+
+        // if(rand() % 10000 <= p * 10000) {
+        //     id = CCAnr::module_pick_var();
+        // } else {
+            
+        // }
+
+        id = ls_pick();
 
         CCAnr::module_flip_var(id);
+
         ls_flip_var(id);
 
         if(stem_total_cnt == stems.size()) {
@@ -152,12 +168,9 @@ int Circuit::ls_pick() {
 
     int var_score = ls_pick_score(var);
 
-    assert(var != -1);
+    assert(var != -1);;
 
-    int ccanr_var = CCAnr::module_pick_var();
-    int ccanr_score = ls_pick_score(ccanr_var);
-
-    return ccanr_var;
+    return var;
 }
 
 void Circuit::ls_init_stems() {
@@ -224,7 +237,6 @@ void Circuit::ls_init_stems() {
 
 void Circuit::ls_flip_var(int var) {
     ClauseLS::flip(var);
-
     if(id2gate.count(var) && id2gate[var]->stem) {
         ls_flip_stem(id2gate[var]);
     }
@@ -240,7 +252,7 @@ ll Circuit::ls_pick_score(int var) {
 
     ls_flip_var(var);
 
-    //assert(old_score == ls_circuit_score());
+    assert(old_score == ls_circuit_score());
 
     return new_score - old_score;
 }
@@ -269,7 +281,8 @@ void Circuit::ls_random_circuit() {
     for(int i=1; i<=ClauseLS::num_vars; i++) {
         int new_v = CCAnr::module_cur_soln()[i];
         if(new_v != ClauseLS::lit_value[i]) {
-            ls_flip_var(i);
+            //ls_flip_var(i);
+            ClauseLS::flip(i);
         }
     }
 
@@ -309,10 +322,9 @@ void Circuit::ls_random_circuit() {
 
         fault_propagate_score += g->fault_weight[0] * g->fault_propagate_length[0];
         fault_propagate_score += g->fault_weight[1] * g->fault_propagate_length[1];
-
     }
 
-    //assert(is_valid_circuit());
+    assert(is_valid_circuit());
 }
 
 void Circuit::ls_reset_data() {
diff --git a/makefile b/makefile
index f7ff918..7c64677 100644
--- a/makefile
+++ b/makefile
@@ -7,8 +7,8 @@ OBJECTS := $(addprefix build/,$(SOURCES:%=%.o))
 # 声明编译器和编译选项
 CC := gcc
 CXX := g++
-CFLAGS := -Wall -Wextra -MMD -MP
-CXXFLAGS := -Wall -Wextra -MMD -MP
+CFLAGS := -O0 -g -Wall -Wextra -MMD -MP
+CXXFLAGS := -O0 -g -Wall -Wextra -MMD -MP
 
 # 默认目标，编译所有目标文件
 atpg: $(OBJECTS)