YES We show the termination of the TRS R: app(app(plus(),|0|()),y) -> y app(app(plus(),app(s(),x)),y) -> app(s(),app(app(plus(),x),y)) app(app(map(),f),nil()) -> nil() app(app(map(),f),app(app(cons(),x),xs)) -> app(app(cons(),app(f,x)),app(app(map(),f),xs)) app(app(app(curry(),g),x),y) -> app(app(g,x),y) inc() -> app(map(),app(app(curry(),plus()),app(s(),|0|()))) Instead we prove termination of the uncurried system: app(cons_0(),y) -> cons_1(y) app(cons_1(x1),y) -> cons_2(x1,y) app(curry_0(),y) -> curry_1(y) app(curry_1(x1),y) -> curry_2(x1,y) app(curry_2(x1,x2),y) -> curry_3(x1,x2,y) app(map_0(),y) -> map_1(y) app(map_1(x1),y) -> map_2(x1,y) app(plus_0(),y) -> plus_1(y) app(plus_1(x1),y) -> plus_2(x1,y) app(s_0(),y) -> s_1(y) plus_2(|0|_0(),y) -> y plus_2(s_1(x),y) -> s_1(plus_2(x,y)) map_2(f,nil_0()) -> nil_0() map_2(f,cons_2(x,xs)) -> cons_2(app(f,x),map_2(f,xs)) curry_3(g,x,y) -> app(app(g,x),y) inc_0() -> map_1(curry_2(plus_0(),s_1(|0|_0()))) -- SCC decomposition. Consider the dependency pair problem (P, R), where P consists of p1: app#(curry_2(x1,x2),y) -> curry_3#(x1,x2,y) p2: app#(map_1(x1),y) -> map_2#(x1,y) p3: app#(plus_1(x1),y) -> plus_2#(x1,y) p4: plus_2#(s_1(x),y) -> plus_2#(x,y) p5: map_2#(f,cons_2(x,xs)) -> app#(f,x) p6: map_2#(f,cons_2(x,xs)) -> map_2#(f,xs) p7: curry_3#(g,x,y) -> app#(app(g,x),y) p8: curry_3#(g,x,y) -> app#(g,x) and R consists of: r1: app(cons_0(),y) -> cons_1(y) r2: app(cons_1(x1),y) -> cons_2(x1,y) r3: app(curry_0(),y) -> curry_1(y) r4: app(curry_1(x1),y) -> curry_2(x1,y) r5: app(curry_2(x1,x2),y) -> curry_3(x1,x2,y) r6: app(map_0(),y) -> map_1(y) r7: app(map_1(x1),y) -> map_2(x1,y) r8: app(plus_0(),y) -> plus_1(y) r9: app(plus_1(x1),y) -> plus_2(x1,y) r10: app(s_0(),y) -> s_1(y) r11: plus_2(|0|_0(),y) -> y r12: plus_2(s_1(x),y) -> s_1(plus_2(x,y)) r13: map_2(f,nil_0()) -> nil_0() r14: map_2(f,cons_2(x,xs)) -> cons_2(app(f,x),map_2(f,xs)) r15: curry_3(g,x,y) -> app(app(g,x),y) r16: inc_0() -> map_1(curry_2(plus_0(),s_1(|0|_0()))) The estimated dependency graph contains the following SCCs: {p1, p2, p5, p6, p7, p8} {p4} -- Reduction pair. Consider the dependency pair problem (P, R), where P consists of p1: app#(curry_2(x1,x2),y) -> curry_3#(x1,x2,y) p2: curry_3#(g,x,y) -> app#(g,x) p3: app#(map_1(x1),y) -> map_2#(x1,y) p4: map_2#(f,cons_2(x,xs)) -> map_2#(f,xs) p5: map_2#(f,cons_2(x,xs)) -> app#(f,x) p6: curry_3#(g,x,y) -> app#(app(g,x),y) and R consists of: r1: app(cons_0(),y) -> cons_1(y) r2: app(cons_1(x1),y) -> cons_2(x1,y) r3: app(curry_0(),y) -> curry_1(y) r4: app(curry_1(x1),y) -> curry_2(x1,y) r5: app(curry_2(x1,x2),y) -> curry_3(x1,x2,y) r6: app(map_0(),y) -> map_1(y) r7: app(map_1(x1),y) -> map_2(x1,y) r8: app(plus_0(),y) -> plus_1(y) r9: app(plus_1(x1),y) -> plus_2(x1,y) r10: app(s_0(),y) -> s_1(y) r11: plus_2(|0|_0(),y) -> y r12: plus_2(s_1(x),y) -> s_1(plus_2(x,y)) r13: map_2(f,nil_0()) -> nil_0() r14: map_2(f,cons_2(x,xs)) -> cons_2(app(f,x),map_2(f,xs)) r15: curry_3(g,x,y) -> app(app(g,x),y) r16: inc_0() -> map_1(curry_2(plus_0(),s_1(|0|_0()))) The set of usable rules consists of r1, r2, r3, r4, r5, r6, r7, r8, r9, r10, r11, r12, r13, r14, r15 Take the reduction pair: generalized weighted path order (>=MG, >G) base order 1: max/plus interpretation on natural numbers: app#_A(x1,x2) = 12 curry_2_A(x1,x2) = max{12, x2 - 5} curry_3#_A(x1,x2,x3) = 12 map_1_A(x1) = max{0, x1 - 5} map_2#_A(x1,x2) = 12 cons_2_A(x1,x2) = x2 + 14 app_A(x1,x2) = x2 + 15 cons_0_A = 1 cons_1_A(x1) = max{11, x1 - 5} curry_0_A = 12 curry_1_A(x1) = max{11, x1 - 5} curry_3_A(x1,x2,x3) = x3 + 15 map_0_A = 1 map_2_A(x1,x2) = x2 plus_0_A = 6 plus_1_A(x1) = max{7, x1 - 5} plus_2_A(x1,x2) = x2 + 10 s_0_A = 10 s_1_A(x1) = max{9, x1 - 11} |0|_0_A = 10 nil_0_A = 1 base order 2: marked-algebra reduction triple (>=A, >=A!, >A!): max/plus interpretation on natural numbers: app#_A(x1,x2) = max{0, x1 - 35, x2 - 32} curry_2_A(x1,x2) = max{34, x1 + 1, x2 + 10} curry_3#_A(x1,x2,x3) = max{0, x1 - 35, x2 - 25, x3 - 32} map_1_A(x1) = max{6, x1 + 3} map_2#_A(x1,x2) = max{0, x1 - 35, x2 - 32} cons_2_A(x1,x2) = max{10, x1 + 3, x2} app_A(x1,x2) = max{x1 - 7, x2 + 10} cons_0_A = 23 cons_1_A(x1) = max{16, x1 + 10} curry_0_A = 48 curry_1_A(x1) = max{41, x1 + 8} curry_3_A(x1,x2,x3) = max{11, x1 - 6, x2 + 3, x3 + 10} map_0_A = 12 map_2_A(x1,x2) = max{x1 - 4, x2 + 10} plus_0_A = 29 plus_1_A(x1) = max{22, x1 + 6} plus_2_A(x1,x2) = max{15, x1 - 15, x2 + 1} s_0_A = 6 s_1_A(x1) = max{10, x1 - 14} |0|_0_A = 0 nil_0_A = 6 app#!_A(x1,x2) = max{0, x1 - 32} curry_2!_A(x1,x2) = max{2, x1 - 30, x2 - 21} curry_3#!_A(x1,x2,x3) = max{1, x1 - 31, x2 - 22} map_1!_A(x1) = max{2, x1 - 35} map_2#!_A(x1,x2) = max{0, x1 - 29} cons_2!_A(x1,x2) = 8 app!_A(x1,x2) = 4 cons_0!_A = 1 cons_1!_A(x1) = max{5, x1 - 1} curry_0!_A = 1 curry_1!_A(x1) = 5 curry_3!_A(x1,x2,x3) = 4 map_0!_A = 1 map_2!_A(x1,x2) = max{7, x1 + 5, x2 - 1} plus_0!_A = 1 plus_1!_A(x1) = max{3, x1 - 17} plus_2!_A(x1,x2) = max{2, x1 - 17, x2 - 15} s_0!_A = 2 s_1!_A(x1) = max{1, x1 - 16} |0|_0!_A = 2 nil_0!_A = 6 partial status: pi(app#) = [] pi(curry_2) = [] pi(curry_3#) = [] pi(map_1) = [] pi(map_2#) = [] pi(cons_2) = [] pi(app) = [] pi(cons_0) = [] pi(cons_1) = [] pi(curry_0) = [] pi(curry_1) = [] pi(curry_3) = [] pi(map_0) = [] pi(map_2) = [2] pi(plus_0) = [] pi(plus_1) = [] pi(plus_2) = [2] pi(s_0) = [] pi(s_1) = [] pi(|0|_0) = [] pi(nil_0) = [] The following rules are removed: p2 -- SCC decomposition. Consider the dependency pair problem (P, R), where P consists of p1: app#(curry_2(x1,x2),y) -> curry_3#(x1,x2,y) p2: app#(map_1(x1),y) -> map_2#(x1,y) p3: map_2#(f,cons_2(x,xs)) -> map_2#(f,xs) p4: map_2#(f,cons_2(x,xs)) -> app#(f,x) p5: curry_3#(g,x,y) -> app#(app(g,x),y) and R consists of: r1: app(cons_0(),y) -> cons_1(y) r2: app(cons_1(x1),y) -> cons_2(x1,y) r3: app(curry_0(),y) -> curry_1(y) r4: app(curry_1(x1),y) -> curry_2(x1,y) r5: app(curry_2(x1,x2),y) -> curry_3(x1,x2,y) r6: app(map_0(),y) -> map_1(y) r7: app(map_1(x1),y) -> map_2(x1,y) r8: app(plus_0(),y) -> plus_1(y) r9: app(plus_1(x1),y) -> plus_2(x1,y) r10: app(s_0(),y) -> s_1(y) r11: plus_2(|0|_0(),y) -> y r12: plus_2(s_1(x),y) -> s_1(plus_2(x,y)) r13: map_2(f,nil_0()) -> nil_0() r14: map_2(f,cons_2(x,xs)) -> cons_2(app(f,x),map_2(f,xs)) r15: curry_3(g,x,y) -> app(app(g,x),y) r16: inc_0() -> map_1(curry_2(plus_0(),s_1(|0|_0()))) The estimated dependency graph contains the following SCCs: {p1, p2, p3, p4, p5} -- Reduction pair. Consider the dependency pair problem (P, R), where P consists of p1: app#(curry_2(x1,x2),y) -> curry_3#(x1,x2,y) p2: curry_3#(g,x,y) -> app#(app(g,x),y) p3: app#(map_1(x1),y) -> map_2#(x1,y) p4: map_2#(f,cons_2(x,xs)) -> app#(f,x) p5: map_2#(f,cons_2(x,xs)) -> map_2#(f,xs) and R consists of: r1: app(cons_0(),y) -> cons_1(y) r2: app(cons_1(x1),y) -> cons_2(x1,y) r3: app(curry_0(),y) -> curry_1(y) r4: app(curry_1(x1),y) -> curry_2(x1,y) r5: app(curry_2(x1,x2),y) -> curry_3(x1,x2,y) r6: app(map_0(),y) -> map_1(y) r7: app(map_1(x1),y) -> map_2(x1,y) r8: app(plus_0(),y) -> plus_1(y) r9: app(plus_1(x1),y) -> plus_2(x1,y) r10: app(s_0(),y) -> s_1(y) r11: plus_2(|0|_0(),y) -> y r12: plus_2(s_1(x),y) -> s_1(plus_2(x,y)) r13: map_2(f,nil_0()) -> nil_0() r14: map_2(f,cons_2(x,xs)) -> cons_2(app(f,x),map_2(f,xs)) r15: curry_3(g,x,y) -> app(app(g,x),y) r16: inc_0() -> map_1(curry_2(plus_0(),s_1(|0|_0()))) The set of usable rules consists of r1, r2, r3, r4, r5, r6, r7, r8, r9, r10, r11, r12, r13, r14, r15 Take the reduction pair: generalized weighted path order (>=MG, >G) base order 1: max/plus interpretation on natural numbers: app#_A(x1,x2) = 24 curry_2_A(x1,x2) = max{x1 - 6, x2 + 13} curry_3#_A(x1,x2,x3) = 24 app_A(x1,x2) = max{x1 - 8, x2 + 13} map_1_A(x1) = max{23, x1 + 13} map_2#_A(x1,x2) = 24 cons_2_A(x1,x2) = 3 cons_0_A = 9 cons_1_A(x1) = max{10, x1 + 7} curry_0_A = 9 curry_1_A(x1) = max{7, x1 + 2} curry_3_A(x1,x2,x3) = max{x1 - 14, x2 + 5, x3 + 13} map_0_A = 31 map_2_A(x1,x2) = max{14, x1 + 4} plus_0_A = 53 plus_1_A(x1) = 44 plus_2_A(x1,x2) = max{35, x2 + 1} s_0_A = 6 s_1_A(x1) = max{7, x1 - 27} |0|_0_A = 0 nil_0_A = 13 base order 2: marked-algebra reduction triple (>=A, >=A!, >A!): max/plus interpretation on natural numbers: app#_A(x1,x2) = max{0, x1 - 32, x2 - 21} curry_2_A(x1,x2) = max{x1 - 1, x2 + 31} curry_3#_A(x1,x2,x3) = max{0, x1 - 33, x2 - 1, x3 - 21} app_A(x1,x2) = max{x1 - 27, x2 + 31} map_1_A(x1) = max{20, x1 + 4} map_2#_A(x1,x2) = max{0, x1 - 28, x2 - 21} cons_2_A(x1,x2) = max{16, x1 + 4, x2} cons_0_A = 15 cons_1_A(x1) = x1 + 31 curry_0_A = 13 curry_1_A(x1) = x1 + 26 curry_3_A(x1,x2,x3) = max{x1 - 54, x2 + 4, x3 + 31} map_0_A = 13 map_2_A(x1,x2) = max{x1 - 23, x2 + 31} plus_0_A = 16 plus_1_A(x1) = max{15, x1 + 13} plus_2_A(x1,x2) = max{18, x1 - 14, x2 + 1} s_0_A = 22 s_1_A(x1) = max{13, x1 - 16} |0|_0_A = 0 nil_0_A = 16 app#!_A(x1,x2) = max{4, x1 + 2} curry_2!_A(x1,x2) = max{10, x2 - 14} curry_3#!_A(x1,x2,x3) = max{x1 - 15, x2 + 33} app!_A(x1,x2) = max{8, x1 - 14, x2 - 3} map_1!_A(x1) = max{0, x1 - 45} map_2#!_A(x1,x2) = max{7, x1 + 5} cons_2!_A(x1,x2) = max{3, x1 - 4, x2 - 32} cons_0!_A = 1 cons_1!_A(x1) = max{2, x1 - 5} curry_0!_A = 1 curry_1!_A(x1) = max{9, x1 + 1} curry_3!_A(x1,x2,x3) = max{x1 - 15, x2 + 17, x3 - 3} map_0!_A = 1 map_2!_A(x1,x2) = max{7, x1} plus_0!_A = 1 plus_1!_A(x1) = 1 plus_2!_A(x1,x2) = max{7, x1 - 2, x2 - 4} s_0!_A = 6 s_1!_A(x1) = max{7, x1 - 37} |0|_0!_A = 0 nil_0!_A = 1 partial status: pi(app#) = [] pi(curry_2) = [2] pi(curry_3#) = [] pi(app) = [2] pi(map_1) = [] pi(map_2#) = [] pi(cons_2) = [] pi(cons_0) = [] pi(cons_1) = [1] pi(curry_0) = [] pi(curry_1) = [] pi(curry_3) = [3] pi(map_0) = [] pi(map_2) = [1] pi(plus_0) = [] pi(plus_1) = [] pi(plus_2) = [] pi(s_0) = [] pi(s_1) = [] pi(|0|_0) = [] pi(nil_0) = [] The following rules are removed: p3, p4 -- SCC decomposition. Consider the dependency pair problem (P, R), where P consists of p1: app#(curry_2(x1,x2),y) -> curry_3#(x1,x2,y) p2: curry_3#(g,x,y) -> app#(app(g,x),y) p3: map_2#(f,cons_2(x,xs)) -> map_2#(f,xs) and R consists of: r1: app(cons_0(),y) -> cons_1(y) r2: app(cons_1(x1),y) -> cons_2(x1,y) r3: app(curry_0(),y) -> curry_1(y) r4: app(curry_1(x1),y) -> curry_2(x1,y) r5: app(curry_2(x1,x2),y) -> curry_3(x1,x2,y) r6: app(map_0(),y) -> map_1(y) r7: app(map_1(x1),y) -> map_2(x1,y) r8: app(plus_0(),y) -> plus_1(y) r9: app(plus_1(x1),y) -> plus_2(x1,y) r10: app(s_0(),y) -> s_1(y) r11: plus_2(|0|_0(),y) -> y r12: plus_2(s_1(x),y) -> s_1(plus_2(x,y)) r13: map_2(f,nil_0()) -> nil_0() r14: map_2(f,cons_2(x,xs)) -> cons_2(app(f,x),map_2(f,xs)) r15: curry_3(g,x,y) -> app(app(g,x),y) r16: inc_0() -> map_1(curry_2(plus_0(),s_1(|0|_0()))) The estimated dependency graph contains the following SCCs: {p1, p2} {p3} -- Reduction pair. Consider the dependency pair problem (P, R), where P consists of p1: app#(curry_2(x1,x2),y) -> curry_3#(x1,x2,y) p2: curry_3#(g,x,y) -> app#(app(g,x),y) and R consists of: r1: app(cons_0(),y) -> cons_1(y) r2: app(cons_1(x1),y) -> cons_2(x1,y) r3: app(curry_0(),y) -> curry_1(y) r4: app(curry_1(x1),y) -> curry_2(x1,y) r5: app(curry_2(x1,x2),y) -> curry_3(x1,x2,y) r6: app(map_0(),y) -> map_1(y) r7: app(map_1(x1),y) -> map_2(x1,y) r8: app(plus_0(),y) -> plus_1(y) r9: app(plus_1(x1),y) -> plus_2(x1,y) r10: app(s_0(),y) -> s_1(y) r11: plus_2(|0|_0(),y) -> y r12: plus_2(s_1(x),y) -> s_1(plus_2(x,y)) r13: map_2(f,nil_0()) -> nil_0() r14: map_2(f,cons_2(x,xs)) -> cons_2(app(f,x),map_2(f,xs)) r15: curry_3(g,x,y) -> app(app(g,x),y) r16: inc_0() -> map_1(curry_2(plus_0(),s_1(|0|_0()))) The set of usable rules consists of r1, r2, r3, r4, r5, r6, r7, r8, r9, r10, r11, r12, r13, r14, r15 Take the reduction pair: generalized weighted path order (>=MG, >G) base order 1: max/plus interpretation on natural numbers: app#_A(x1,x2) = x1 curry_2_A(x1,x2) = max{x1, x2} curry_3#_A(x1,x2,x3) = max{x1, x2} app_A(x1,x2) = max{x1, x2} cons_0_A = 0 cons_1_A(x1) = x1 cons_2_A(x1,x2) = 0 curry_0_A = 1 curry_1_A(x1) = max{1, x1} curry_3_A(x1,x2,x3) = max{x1, x2, x3} map_0_A = 1 map_1_A(x1) = x1 map_2_A(x1,x2) = max{0, x1 - 2} plus_0_A = 1 plus_1_A(x1) = 1 plus_2_A(x1,x2) = max{1, x2} s_0_A = 1 s_1_A(x1) = max{0, x1 - 2} |0|_0_A = 1 nil_0_A = 0 base order 2: marked-algebra reduction triple (>=A, >=A!, >A!): max/plus interpretation on natural numbers: app#_A(x1,x2) = max{1, x1 - 3, x2 - 3} curry_2_A(x1,x2) = max{x1 - 12, x2 + 11} curry_3#_A(x1,x2,x3) = max{x1 - 15, x2 + 8, x3 - 3} app_A(x1,x2) = max{x1 - 12, x2 + 11} cons_0_A = 4 cons_1_A(x1) = x1 + 4 cons_2_A(x1,x2) = 10 curry_0_A = 2 curry_1_A(x1) = max{11, x1 + 9} curry_3_A(x1,x2,x3) = max{x1 - 24, x2 - 1, x3 + 11} map_0_A = 0 map_1_A(x1) = max{11, x1 + 4} map_2_A(x1,x2) = x2 + 11 plus_0_A = 2 plus_1_A(x1) = x1 + 2 plus_2_A(x1,x2) = max{11, x2 + 10} s_0_A = 4 s_1_A(x1) = max{11, x1 - 33} |0|_0_A = 11 nil_0_A = 10 app#!_A(x1,x2) = 0 curry_2!_A(x1,x2) = max{7, x1 + 5} curry_3#!_A(x1,x2,x3) = x1 + 4 app!_A(x1,x2) = max{3, x1 - 3} cons_0!_A = 0 cons_1!_A(x1) = 0 cons_2!_A(x1,x2) = 0 curry_0!_A = 1 curry_1!_A(x1) = 2 curry_3!_A(x1,x2,x3) = max{x1 - 15, x2 + 8} map_0!_A = 1 map_1!_A(x1) = 2 map_2!_A(x1,x2) = 0 plus_0!_A = 2 plus_1!_A(x1) = 1 plus_2!_A(x1,x2) = max{2, x1 - 12} s_0!_A = 0 s_1!_A(x1) = 0 |0|_0!_A = 0 nil_0!_A = 0 partial status: pi(app#) = [1] pi(curry_2) = [2] pi(curry_3#) = [2] pi(app) = [2] pi(cons_0) = [] pi(cons_1) = [1] pi(cons_2) = [] pi(curry_0) = [] pi(curry_1) = [] pi(curry_3) = [3] pi(map_0) = [] pi(map_1) = [] pi(map_2) = [] pi(plus_0) = [] pi(plus_1) = [] pi(plus_2) = [2] pi(s_0) = [] pi(s_1) = [] pi(|0|_0) = [] pi(nil_0) = [] The following rules are removed: p1, p2 Then no dependency pair remains. -- Reduction pair. Consider the dependency pair problem (P, R), where P consists of p1: map_2#(f,cons_2(x,xs)) -> map_2#(f,xs) and R consists of: r1: app(cons_0(),y) -> cons_1(y) r2: app(cons_1(x1),y) -> cons_2(x1,y) r3: app(curry_0(),y) -> curry_1(y) r4: app(curry_1(x1),y) -> curry_2(x1,y) r5: app(curry_2(x1,x2),y) -> curry_3(x1,x2,y) r6: app(map_0(),y) -> map_1(y) r7: app(map_1(x1),y) -> map_2(x1,y) r8: app(plus_0(),y) -> plus_1(y) r9: app(plus_1(x1),y) -> plus_2(x1,y) r10: app(s_0(),y) -> s_1(y) r11: plus_2(|0|_0(),y) -> y r12: plus_2(s_1(x),y) -> s_1(plus_2(x,y)) r13: map_2(f,nil_0()) -> nil_0() r14: map_2(f,cons_2(x,xs)) -> cons_2(app(f,x),map_2(f,xs)) r15: curry_3(g,x,y) -> app(app(g,x),y) r16: inc_0() -> map_1(curry_2(plus_0(),s_1(|0|_0()))) The set of usable rules consists of (no rules) Take the reduction pair: generalized weighted path order (>=MG, >G) base order 1: max/plus interpretation on natural numbers: map_2#_A(x1,x2) = max{4, x2} cons_2_A(x1,x2) = max{4, x2} base order 2: marked-algebra reduction triple (>=A, >=A!, >A!): max/plus interpretation on natural numbers: map_2#_A(x1,x2) = 0 cons_2_A(x1,x2) = max{6, x1 - 2, x2 - 4} map_2#!_A(x1,x2) = 0 cons_2!_A(x1,x2) = max{3, x1 - 6, x2 - 3} partial status: pi(map_2#) = [2] pi(cons_2) = [2] The following rules are removed: p1 Then no dependency pair remains. -- Reduction pair. Consider the dependency pair problem (P, R), where P consists of p1: plus_2#(s_1(x),y) -> plus_2#(x,y) and R consists of: r1: app(cons_0(),y) -> cons_1(y) r2: app(cons_1(x1),y) -> cons_2(x1,y) r3: app(curry_0(),y) -> curry_1(y) r4: app(curry_1(x1),y) -> curry_2(x1,y) r5: app(curry_2(x1,x2),y) -> curry_3(x1,x2,y) r6: app(map_0(),y) -> map_1(y) r7: app(map_1(x1),y) -> map_2(x1,y) r8: app(plus_0(),y) -> plus_1(y) r9: app(plus_1(x1),y) -> plus_2(x1,y) r10: app(s_0(),y) -> s_1(y) r11: plus_2(|0|_0(),y) -> y r12: plus_2(s_1(x),y) -> s_1(plus_2(x,y)) r13: map_2(f,nil_0()) -> nil_0() r14: map_2(f,cons_2(x,xs)) -> cons_2(app(f,x),map_2(f,xs)) r15: curry_3(g,x,y) -> app(app(g,x),y) r16: inc_0() -> map_1(curry_2(plus_0(),s_1(|0|_0()))) The set of usable rules consists of (no rules) Take the reduction pair: generalized weighted path order (>=MG, >G) base order 1: max/plus interpretation on natural numbers: plus_2#_A(x1,x2) = max{x1 + 4, x2 + 5} s_1_A(x1) = x1 + 3 base order 2: marked-algebra reduction triple (>=A, >=A!, >A!): max/plus interpretation on natural numbers: plus_2#_A(x1,x2) = 0 s_1_A(x1) = max{3, x1 - 3} plus_2#!_A(x1,x2) = max{3, x2 + 1} s_1!_A(x1) = max{2, x1 - 10} partial status: pi(plus_2#) = [1] pi(s_1) = [1] The following rules are removed: p1 Then no dependency pair remains.