verify: I: check: deadlock: ok
verify: I: check: unreachable: ok
verify: I: check: livelock: ok
verify: I: check: deterministic: ok
verify: J: check: deadlock: ok
verify: J: check: unreachable: ok
verify: J: check: livelock: ok
verify: J: check: deterministic: ok
verify: external_requires_twice: check: deterministic: ok
verify: external_requires_twice: check: illegal: ok
verify: external_requires_twice: check: deadlock: ok
verify: external_requires_twice: check: unreachable: ok
verify: external_requires_twice: check: livelock: ok
verify: external_requires_twice: check: compliance: ok
