make: 'atpg' is up to date.
========================
parsing file ./benchmark/b22.bench ... Done.
====== Circuit Statistics ====== 
PI:	767
PO:	757
Gate:	13721
Stem:	5379
Level:	8
================================ 
[SOL] flip: 0, stem: 0, fault:75481. flip_cnt: 0, stem_cnt: 5379, fault_cnt:4379
coverage: 15.957%	pattern: 1	before: 27442	now: 23063
checking valid circuit ... result: 1.
[SOL] flip: 0, stem: 0, fault:42481. flip_cnt: 0, stem_cnt: 5379, fault_cnt:4587
coverage: 24.299%	pattern: 2	before: 23063	now: 20774
checking valid circuit ... result: 1.
[SOL] flip: 0, stem: 0, fault:19160. flip_cnt: 0, stem_cnt: 5379, fault_cnt:4476
coverage: 28.613%	pattern: 3	before: 20774	now: 19590
checking valid circuit ... result: 1.
[SOL] flip: 0, stem: 0, fault:10322. flip_cnt: 0, stem_cnt: 5379, fault_cnt:4248
coverage: 30.701%	pattern: 4	before: 19590	now: 19017
checking valid circuit ... result: 1.