verify: ihello: check: deadlock: ok
verify: ihello: check: unreachable: ok
verify: ihello: check: livelock: ok
verify: ihello: check: deterministic: ok
verify: hello_optional_flush: check: deterministic: ok
verify: hello_optional_flush: check: illegal: ok
verify: hello_optional_flush: check: deadlock: ok
verify: hello_optional_flush: check: unreachable: ok
verify: hello_optional_flush: check: livelock: ok
verify: hello_optional_flush: check: compliance: ok
