YES Problem: p(p(b(a(x0)),x1),p(x2,x3)) -> p(p(b(x2),a(a(b(x1)))),p(x3,x0)) Proof: DP Processor: DPs: p#(p(b(a(x0)),x1),p(x2,x3)) -> p#(x3,x0) p#(p(b(a(x0)),x1),p(x2,x3)) -> p#(b(x2),a(a(b(x1)))) p#(p(b(a(x0)),x1),p(x2,x3)) -> p#(p(b(x2),a(a(b(x1)))),p(x3,x0)) TRS: p(p(b(a(x0)),x1),p(x2,x3)) -> p(p(b(x2),a(a(b(x1)))),p(x3,x0)) EDG Processor: DPs: p#(p(b(a(x0)),x1),p(x2,x3)) -> p#(x3,x0) p#(p(b(a(x0)),x1),p(x2,x3)) -> p#(b(x2),a(a(b(x1)))) p#(p(b(a(x0)),x1),p(x2,x3)) -> p#(p(b(x2),a(a(b(x1)))),p(x3,x0)) TRS: p(p(b(a(x0)),x1),p(x2,x3)) -> p(p(b(x2),a(a(b(x1)))),p(x3,x0)) graph: p#(p(b(a(x0)),x1),p(x2,x3)) -> p#(p(b(x2),a(a(b(x1)))),p(x3,x0)) -> p#(p(b(a(x0)),x1),p(x2,x3)) -> p#(x3,x0) p#(p(b(a(x0)),x1),p(x2,x3)) -> p#(p(b(x2),a(a(b(x1)))),p(x3,x0)) -> p#(p(b(a(x0)),x1),p(x2,x3)) -> p#(b(x2),a(a(b(x1)))) p#(p(b(a(x0)),x1),p(x2,x3)) -> p#(p(b(x2),a(a(b(x1)))),p(x3,x0)) -> p#(p(b(a(x0)),x1),p(x2,x3)) -> p#(p(b(x2),a(a(b(x1)))),p(x3,x0)) p#(p(b(a(x0)),x1),p(x2,x3)) -> p#(x3,x0) -> p#(p(b(a(x0)),x1),p(x2,x3)) -> p#(x3,x0) p#(p(b(a(x0)),x1),p(x2,x3)) -> p#(x3,x0) -> p#(p(b(a(x0)),x1),p(x2,x3)) -> p#(b(x2),a(a(b(x1)))) p#(p(b(a(x0)),x1),p(x2,x3)) -> p#(x3,x0) -> p#(p(b(a(x0)),x1),p(x2,x3)) -> p#(p(b(x2),a(a(b(x1)))),p(x3,x0)) SCC Processor: #sccs: 1 #rules: 2 #arcs: 6/9 DPs: p#(p(b(a(x0)),x1),p(x2,x3)) -> p#(p(b(x2),a(a(b(x1)))),p(x3,x0)) p#(p(b(a(x0)),x1),p(x2,x3)) -> p#(x3,x0) TRS: p(p(b(a(x0)),x1),p(x2,x3)) -> p(p(b(x2),a(a(b(x1)))),p(x3,x0)) Matrix Interpretation Processor: dimension: 1 interpretation: [p#](x0, x1) = x0 + x1, [p](x0, x1) = x0 + x1 + 1, [b](x0) = x0, [a](x0) = x0 orientation: p#(p(b(a(x0)),x1),p(x2,x3)) = x0 + x1 + x2 + x3 + 2 >= x0 + x1 + x2 + x3 + 2 = p#(p(b(x2),a(a(b(x1)))),p(x3,x0)) p#(p(b(a(x0)),x1),p(x2,x3)) = x0 + x1 + x2 + x3 + 2 >= x0 + x3 = p#(x3,x0) p(p(b(a(x0)),x1),p(x2,x3)) = x0 + x1 + x2 + x3 + 3 >= x0 + x1 + x2 + x3 + 3 = p(p(b(x2),a(a(b(x1)))),p(x3,x0)) problem: DPs: p#(p(b(a(x0)),x1),p(x2,x3)) -> p#(p(b(x2),a(a(b(x1)))),p(x3,x0)) TRS: p(p(b(a(x0)),x1),p(x2,x3)) -> p(p(b(x2),a(a(b(x1)))),p(x3,x0)) Bounds Processor: bound: 1 enrichment: match automaton: final states: {9,1} transitions: p1(7,14) -> 49* p1(2,14) -> 49* p1(13,7) -> 49* p1(3,7) -> 49* p1(13,13) -> 49* p1(3,13) -> 49* p1(49,4) -> 49* p1(14,4) -> 49* p1(4,4) -> 49* p1(49,14) -> 49* p1(14,14) -> 49* p1(4,14) -> 49* p1(5,7) -> 49* p1(5,13) -> 49* p1(7,7) -> 49* p1(2,7) -> 49* p1(7,13) -> 49* p1(2,13) -> 49* p1(13,4) -> 49* p1(3,4) -> 49* p1(13,14) -> 49* p1(3,14) -> 49* p1(49,7) -> 49* p1(49,13) -> 49* p1(14,7) -> 49* p1(4,7) -> 49* p1(14,13) -> 49* p1(4,13) -> 49* p1(53,52) -> 54* p1(5,4) -> 49* p1(5,14) -> 49* p1(54,49) -> 9,3 p1(7,4) -> 49* p1(2,4) -> 49* b1(15) -> 50* b1(5) -> 53* b1(52) -> 50* b1(7) -> 53* b1(2) -> 53* b1(54) -> 53* b1(49) -> 53* b1(14) -> 53* b1(4) -> 53* b1(6) -> 50* b1(13) -> 53* b1(8) -> 53* b1(3) -> 53* a1(50) -> 51* a1(51) -> 52* p{#,1}(54,49) -> 1* f40() -> 2* p{#,0}(8,3) -> 1* p0(7,14) -> 3* p0(2,14) -> 3* p0(8,3) -> 9* p0(13,7) -> 3* p0(3,7) -> 3* p0(13,13) -> 3* p0(3,13) -> 3* p0(14,2) -> 3* p0(4,2) -> 3* p0(14,4) -> 3* p0(4,4) -> 3* p0(14,14) -> 3* p0(4,14) -> 3* p0(5,7) -> 3* p0(5,13) -> 3* p0(2,5) -> 3* p0(7,7) -> 3* p0(2,7) -> 3* p0(7,13) -> 3* p0(2,13) -> 3* p0(7,15) -> 8* p0(13,2) -> 3* p0(13,4) -> 3* p0(3,2) -> 3* p0(3,4) -> 3* p0(13,14) -> 3* p0(3,14) -> 3* p0(14,7) -> 3* p0(4,7) -> 3* p0(14,13) -> 3* p0(4,13) -> 3* p0(4,15) -> 8* p0(5,2) -> 3* p0(5,4) -> 3* p0(5,14) -> 3* p0(7,2) -> 3* p0(2,2) -> 3* p0(7,4) -> 3* p0(2,4) -> 3* p0(7,6) -> 8* b0(15) -> 4* b0(5) -> 7* b0(7) -> 7* b0(2) -> 7,4 b0(14) -> 7* b0(4) -> 7* b0(6) -> 13* b0(13) -> 7* b0(8) -> 7* b0(3) -> 7* a0(5) -> 6* a0(7) -> 14* a0(14) -> 15* a0(4) -> 5* a0(13) -> 14* 9 -> 3* problem: DPs: TRS: p(p(b(a(x0)),x1),p(x2,x3)) -> p(p(b(x2),a(a(b(x1)))),p(x3,x0)) Qed