YES Problem: *(i(x),x) -> 1() *(1(),y) -> y *(x,0()) -> 0() *(*(x,y),z) -> *(x,*(y,z)) Proof: Bounds Processor: bound: 1 enrichment: top automaton: final states: {9,8,7,6,4,3,2,1} transitions: f40() -> 7*,5,4,2 10() -> 8*,5,4,1 00() -> 9*,5,4,3 *0(7,5) -> 6* *0(2,5) -> 6*,5,4 *0(7,7) -> 6* *0(2,7) -> 6* *0(7,9) -> 6* *0(2,9) -> 6* *0(7,2) -> 6* *0(2,2) -> 6*,4,5 *0(7,6) -> 6* *0(2,6) -> 6* *0(7,8) -> 6* *0(2,8) -> 6* 01() -> 6,3,4,5,9* 1 -> 4,5 2 -> 5* 3 -> 5* 4 -> 5* 5 -> 4* problem: Qed