diff --git a/tests/auto_crash_gen_script/auto_crash_gen_script.py b/tests/auto_crash_gen_script/auto_crash_gen_script.py
index 723d5324cc08df0b0d95ac4c7e52f1c56e583726..b80782bc911b275286ed01e8a2a91884285cdde1 100644
--- a/tests/auto_crash_gen_script/auto_crash_gen_script.py
+++ b/tests/auto_crash_gen_script/auto_crash_gen_script.py
@@ -75,9 +75,9 @@ def random_args(args_list):
     args_list["--debug"]=False
     args_list["--per-thread-db-connection"]=True
     args_list["--track-memory-leaks"]=False
-    args_list["--max-steps"]=random.randint(100,250)
+    args_list["--max-steps"]=random.randint(200,300)
     
-    threads = [4,16,32,64]
+    threads = [16,32,64]
     args_list["--num-threads"]=random.sample(threads,1)[0] #$ debug
     args_list["--ignore-errors"]=[]   ## can add error codes for detail