unknown Initial ITS Start location: [1] Program variables: 0: [1] -> [1] : _|_, cost: 1 1: [1] -> [2] : T, cost: 1 Step with 1 Trace 1[T] Blocked [{}, {}] Backtrack Trace Blocked [{1[T]}] Accept unknown Build SHA: a05f16bf13df659c382799650051f91bf6828c7b