YES Problem: p(p(b(a(x0)),x1),p(x2,x3)) -> p(p(x3,a(x2)),p(b(a(x1)),b(x0))) Proof: DP Processor: DPs: p#(p(b(a(x0)),x1),p(x2,x3)) -> p#(b(a(x1)),b(x0)) p#(p(b(a(x0)),x1),p(x2,x3)) -> p#(x3,a(x2)) p#(p(b(a(x0)),x1),p(x2,x3)) -> p#(p(x3,a(x2)),p(b(a(x1)),b(x0))) TRS: p(p(b(a(x0)),x1),p(x2,x3)) -> p(p(x3,a(x2)),p(b(a(x1)),b(x0))) EDG Processor: DPs: p#(p(b(a(x0)),x1),p(x2,x3)) -> p#(b(a(x1)),b(x0)) p#(p(b(a(x0)),x1),p(x2,x3)) -> p#(x3,a(x2)) p#(p(b(a(x0)),x1),p(x2,x3)) -> p#(p(x3,a(x2)),p(b(a(x1)),b(x0))) TRS: p(p(b(a(x0)),x1),p(x2,x3)) -> p(p(x3,a(x2)),p(b(a(x1)),b(x0))) graph: p#(p(b(a(x0)),x1),p(x2,x3)) -> p#(p(x3,a(x2)),p(b(a(x1)),b(x0))) -> p#(p(b(a(x0)),x1),p(x2,x3)) -> p#(b(a(x1)),b(x0)) p#(p(b(a(x0)),x1),p(x2,x3)) -> p#(p(x3,a(x2)),p(b(a(x1)),b(x0))) -> p#(p(b(a(x0)),x1),p(x2,x3)) -> p#(x3,a(x2)) p#(p(b(a(x0)),x1),p(x2,x3)) -> p#(p(x3,a(x2)),p(b(a(x1)),b(x0))) -> p#(p(b(a(x0)),x1),p(x2,x3)) -> p#(p(x3,a(x2)),p(b(a(x1)),b(x0))) SCC Processor: #sccs: 1 #rules: 1 #arcs: 3/9 DPs: p#(p(b(a(x0)),x1),p(x2,x3)) -> p#(p(x3,a(x2)),p(b(a(x1)),b(x0))) TRS: p(p(b(a(x0)),x1),p(x2,x3)) -> p(p(x3,a(x2)),p(b(a(x1)),b(x0))) Bounds Processor: bound: 0 enrichment: match automaton: final states: {9,1} transitions: p{#,0}(8,6) -> 1* a0(5) -> 15* a0(15) -> 4* a0(7) -> 4* a0(2) -> 7,4 p0(8,6) -> 9* p0(3,15) -> 8* p0(2,7) -> 8* p0(5,3) -> 6* f40() -> 2* b0(4) -> 5* b0(2) -> 3* problem: DPs: TRS: p(p(b(a(x0)),x1),p(x2,x3)) -> p(p(x3,a(x2)),p(b(a(x1)),b(x0))) Qed