-> [Checker] Execute 2: MUTEX_ASYNC_LOCK(mutex: 0, owner: 2) (stack depth: 1, state: 1, 0 interleaves)
-> [Checker] Execute 1: MUTEX_ASYNC_LOCK(mutex: 0, owner: 2) (stack depth: 2, state: 8, 0 interleaves)
-> [Checker] Dependent Transitions:
-> [Checker] MUTEX_ASYNC_LOCK(mutex: 0, owner: 2) (state=1)
-> [Checker] MUTEX_ASYNC_LOCK(mutex: 0, owner: 2) (state=8)
-> [Checker] Execute 2: MUTEX_WAIT(mutex: 0, owner: 2) (stack depth: 3, state: 9, 0 interleaves)
-> [Checker] INDEPENDENT Transitions:
-> [Checker] MUTEX_ASYNC_LOCK(mutex: 0, owner: 2) (state=8)
-> [Checker] MUTEX_WAIT(mutex: 0, owner: 2) (state=9)
-> [Checker] Execute 2: MUTEX_UNLOCK(mutex: 0, owner: 1) (stack depth: 4, state: 10, 0 interleaves)
-> [Checker] INDEPENDENT Transitions:
-> [Checker] MUTEX_ASYNC_LOCK(mutex: 0, owner: 2) (state=8)
-> [Checker] MUTEX_UNLOCK(mutex: 0, owner: 1) (state=10)
-> [Checker] Execute 1: MUTEX_WAIT(mutex: 0, owner: 1) (stack depth: 5, state: 11, 0 interleaves)
-> [Checker] Dependent Transitions:
-> [Checker] MUTEX_UNLOCK(mutex: 0, owner: 1) (state=10)
-> [Checker] MUTEX_WAIT(mutex: 0, owner: 1) (state=11)
-> [Checker] Execute 1: MUTEX_UNLOCK(mutex: 0, owner: -1) (stack depth: 6, state: 12, 0 interleaves)
-> [Checker] Dependent Transitions:
-> [Checker] MUTEX_UNLOCK(mutex: 0, owner: 1) (state=10)
-> [Checker] MUTEX_UNLOCK(mutex: 0, owner: -1) (state=12)
-> [Checker] 0 actors remain, but none of them need to be interleaved (depth 8).
-> [Checker] Execution came to an end at 2;1;2;2;1;1 (state: 13, depth: 7)
-> [Checker] Backtracking from 2;1;2;2;1;1