fuzz stats stay unchanged with long time

[uestcmahone]

healer commit: 407a554
After running fuzz about 2 hours, all stats remain unchanged，so this is normal for the current number of sys fots or a bug?

2020-06-05 11:35:11 INFO - exec 847, blocks 7444, branches 8546, failed 0, crashed 0
...
2020-06-05 13:33:42 INFO - exec 55004, blocks 19995, branches 24871, failed 171, crashed 0
2020-06-05 13:33:57 INFO - exec 55069, blocks 19995, branches 24871, failed 171, crashed 0
2020-06-05 13:34:12 INFO - exec 55069, blocks 19995, branches 24871, failed 171, crashed 0
2020-06-05 13:34:27 INFO - exec 55121, blocks 19995, branches 24871, failed 171, crashed 0
2020-06-05 13:34:42 INFO - exec 55201, blocks 19995, branches 24871, failed 171, crashed 0
2020-06-05 13:34:57 INFO - exec 55270, blocks 19995, branches 24871, failed 171, crashed 0
2020-06-05 13:35:12 INFO - exec 55270, blocks 19995, branches 24871, failed 171, crashed 0
2020-06-05 13:35:27 INFO - exec 55270, blocks 19995, branches 24871, failed 171, crashed 0
...
2020-06-06 09:44:33 INFO - exec 55270, blocks 19995, branches 24871, failed 171, crashed 0

[SunHao-0]

This should be a bug. The number of execution has not changed for a long time, it is likely that the fuzzer is blocked. Upload the complete log and configuration please.

[uestcmahone]

21.zip
complete logs and config as attachment, anything else needed, please let me know!