YES We show the termination of the TRS R: app(f(),app(app(cons(),nil()),y)) -> y app(f(),app(app(cons(),app(f(),app(app(cons(),nil()),y))),z)) -> app(app(app(copy(),n()),y),z) app(app(app(copy(),|0|()),y),z) -> app(f(),z) app(app(app(copy(),app(s(),x)),y),z) -> app(app(app(copy(),x),y),app(app(cons(),app(f(),y)),z)) app(app(map(),|fun|),nil()) -> nil() app(app(map(),|fun|),app(app(cons(),x),xs)) -> app(app(cons(),app(|fun|,x)),app(app(map(),|fun|),xs)) app(app(filter(),|fun|),nil()) -> nil() app(app(filter(),|fun|),app(app(cons(),x),xs)) -> app(app(app(app(filter2(),app(|fun|,x)),|fun|),x),xs) app(app(app(app(filter2(),true()),|fun|),x),xs) -> app(app(cons(),x),app(app(filter(),|fun|),xs)) app(app(app(app(filter2(),false()),|fun|),x),xs) -> app(app(filter(),|fun|),xs) 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(copy_0(),y) -> copy_1(y) app(copy_1(x1),y) -> copy_2(x1,y) app(copy_2(x1,x2),y) -> copy_3(x1,x2,y) app(f_0(),y) -> f_1(y) app(filter_0(),y) -> filter_1(y) app(filter_1(x1),y) -> filter_2(x1,y) app(filter2_0(),y) -> filter2_1(y) app(filter2_1(x1),y) -> filter2_2(x1,y) app(filter2_2(x1,x2),y) -> filter2_3(x1,x2,y) app(filter2_3(x1,x2,x3),y) -> filter2_4(x1,x2,x3,y) app(map_0(),y) -> map_1(y) app(map_1(x1),y) -> map_2(x1,y) app(s_0(),y) -> s_1(y) f_1(cons_2(nil_0(),y)) -> y f_1(cons_2(f_1(cons_2(nil_0(),y)),z)) -> copy_3(n_0(),y,z) copy_3(|0|_0(),y,z) -> f_1(z) copy_3(s_1(x),y,z) -> copy_3(x,y,cons_2(f_1(y),z)) map_2(|fun|,nil_0()) -> nil_0() map_2(|fun|,cons_2(x,xs)) -> cons_2(app(|fun|,x),map_2(|fun|,xs)) filter_2(|fun|,nil_0()) -> nil_0() filter_2(|fun|,cons_2(x,xs)) -> filter2_4(app(|fun|,x),|fun|,x,xs) filter2_4(true_0(),|fun|,x,xs) -> cons_2(x,filter_2(|fun|,xs)) filter2_4(false_0(),|fun|,x,xs) -> filter_2(|fun|,xs) -- SCC decomposition. Consider the dependency pair problem (P, R), where P consists of p1: app#(copy_2(x1,x2),y) -> copy_3#(x1,x2,y) p2: app#(f_0(),y) -> f_1#(y) p3: app#(filter_1(x1),y) -> filter_2#(x1,y) p4: app#(filter2_3(x1,x2,x3),y) -> filter2_4#(x1,x2,x3,y) p5: app#(map_1(x1),y) -> map_2#(x1,y) p6: f_1#(cons_2(f_1(cons_2(nil_0(),y)),z)) -> copy_3#(n_0(),y,z) p7: copy_3#(|0|_0(),y,z) -> f_1#(z) p8: copy_3#(s_1(x),y,z) -> copy_3#(x,y,cons_2(f_1(y),z)) p9: copy_3#(s_1(x),y,z) -> f_1#(y) p10: map_2#(|fun|,cons_2(x,xs)) -> app#(|fun|,x) p11: map_2#(|fun|,cons_2(x,xs)) -> map_2#(|fun|,xs) p12: filter_2#(|fun|,cons_2(x,xs)) -> filter2_4#(app(|fun|,x),|fun|,x,xs) p13: filter_2#(|fun|,cons_2(x,xs)) -> app#(|fun|,x) p14: filter2_4#(true_0(),|fun|,x,xs) -> filter_2#(|fun|,xs) p15: filter2_4#(false_0(),|fun|,x,xs) -> filter_2#(|fun|,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(copy_0(),y) -> copy_1(y) r4: app(copy_1(x1),y) -> copy_2(x1,y) r5: app(copy_2(x1,x2),y) -> copy_3(x1,x2,y) r6: app(f_0(),y) -> f_1(y) r7: app(filter_0(),y) -> filter_1(y) r8: app(filter_1(x1),y) -> filter_2(x1,y) r9: app(filter2_0(),y) -> filter2_1(y) r10: app(filter2_1(x1),y) -> filter2_2(x1,y) r11: app(filter2_2(x1,x2),y) -> filter2_3(x1,x2,y) r12: app(filter2_3(x1,x2,x3),y) -> filter2_4(x1,x2,x3,y) r13: app(map_0(),y) -> map_1(y) r14: app(map_1(x1),y) -> map_2(x1,y) r15: app(s_0(),y) -> s_1(y) r16: f_1(cons_2(nil_0(),y)) -> y r17: f_1(cons_2(f_1(cons_2(nil_0(),y)),z)) -> copy_3(n_0(),y,z) r18: copy_3(|0|_0(),y,z) -> f_1(z) r19: copy_3(s_1(x),y,z) -> copy_3(x,y,cons_2(f_1(y),z)) r20: map_2(|fun|,nil_0()) -> nil_0() r21: map_2(|fun|,cons_2(x,xs)) -> cons_2(app(|fun|,x),map_2(|fun|,xs)) r22: filter_2(|fun|,nil_0()) -> nil_0() r23: filter_2(|fun|,cons_2(x,xs)) -> filter2_4(app(|fun|,x),|fun|,x,xs) r24: filter2_4(true_0(),|fun|,x,xs) -> cons_2(x,filter_2(|fun|,xs)) r25: filter2_4(false_0(),|fun|,x,xs) -> filter_2(|fun|,xs) The estimated dependency graph contains the following SCCs: {p3, p4, p5, p10, p11, p12, p13, p14, p15} {p8} -- Reduction pair. Consider the dependency pair problem (P, R), where P consists of p1: map_2#(|fun|,cons_2(x,xs)) -> app#(|fun|,x) p2: app#(map_1(x1),y) -> map_2#(x1,y) p3: map_2#(|fun|,cons_2(x,xs)) -> map_2#(|fun|,xs) p4: app#(filter2_3(x1,x2,x3),y) -> filter2_4#(x1,x2,x3,y) p5: filter2_4#(false_0(),|fun|,x,xs) -> filter_2#(|fun|,xs) p6: filter_2#(|fun|,cons_2(x,xs)) -> app#(|fun|,x) p7: app#(filter_1(x1),y) -> filter_2#(x1,y) p8: filter_2#(|fun|,cons_2(x,xs)) -> filter2_4#(app(|fun|,x),|fun|,x,xs) p9: filter2_4#(true_0(),|fun|,x,xs) -> filter_2#(|fun|,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(copy_0(),y) -> copy_1(y) r4: app(copy_1(x1),y) -> copy_2(x1,y) r5: app(copy_2(x1,x2),y) -> copy_3(x1,x2,y) r6: app(f_0(),y) -> f_1(y) r7: app(filter_0(),y) -> filter_1(y) r8: app(filter_1(x1),y) -> filter_2(x1,y) r9: app(filter2_0(),y) -> filter2_1(y) r10: app(filter2_1(x1),y) -> filter2_2(x1,y) r11: app(filter2_2(x1,x2),y) -> filter2_3(x1,x2,y) r12: app(filter2_3(x1,x2,x3),y) -> filter2_4(x1,x2,x3,y) r13: app(map_0(),y) -> map_1(y) r14: app(map_1(x1),y) -> map_2(x1,y) r15: app(s_0(),y) -> s_1(y) r16: f_1(cons_2(nil_0(),y)) -> y r17: f_1(cons_2(f_1(cons_2(nil_0(),y)),z)) -> copy_3(n_0(),y,z) r18: copy_3(|0|_0(),y,z) -> f_1(z) r19: copy_3(s_1(x),y,z) -> copy_3(x,y,cons_2(f_1(y),z)) r20: map_2(|fun|,nil_0()) -> nil_0() r21: map_2(|fun|,cons_2(x,xs)) -> cons_2(app(|fun|,x),map_2(|fun|,xs)) r22: filter_2(|fun|,nil_0()) -> nil_0() r23: filter_2(|fun|,cons_2(x,xs)) -> filter2_4(app(|fun|,x),|fun|,x,xs) r24: filter2_4(true_0(),|fun|,x,xs) -> cons_2(x,filter_2(|fun|,xs)) r25: filter2_4(false_0(),|fun|,x,xs) -> filter_2(|fun|,xs) The set of usable rules consists of r1, r2, r3, r4, r9, r10, r15, r17, r22 Take the reduction pair: generalized weighted path order (>=MG, >MG) base order 1: max/plus interpretation on natural numbers: map_2#_A(x1,x2) = x1 + 39 cons_2_A(x1,x2) = max{38, x1 - 61, x2 - 61} app#_A(x1,x2) = max{37, x1 + 36} map_1_A(x1) = x1 + 39 filter2_3_A(x1,x2,x3) = max{x1 - 33, x2 + 37, x3} filter2_4#_A(x1,x2,x3,x4) = x2 + 37 false_0_A = 12 filter_2#_A(x1,x2) = x1 + 37 filter_1_A(x1) = x1 + 38 app_A(x1,x2) = max{60, x1 + 11, x2 - 41} true_0_A = 12 cons_0_A = 16 cons_1_A(x1) = max{26, x1 - 60} copy_0_A = 1 copy_1_A(x1) = max{13, x1 - 42} copy_2_A(x1,x2) = max{60, x1 - 43, x2 - 209} filter2_0_A = 1 filter2_1_A(x1) = max{13, x1 - 42} filter2_2_A(x1,x2) = max{25, x1 - 43, x2 - 42} s_0_A = 1 s_1_A(x1) = max{13, x1 - 45} f_1_A(x1) = max{15, x1 - 42} nil_0_A = 13 copy_3_A(x1,x2,x3) = max{14, x1 - 44, x2 - 208, x3 - 104} n_0_A = 12 filter_2_A(x1,x2) = max{50, x1 - 171, x2 - 59} base order 2: precedence: copy_0 = filter_2 > filter_1 = copy_1 > app > false_0 > cons_2 = map_1 = filter2_3 = f_1 = copy_3 > true_0 = cons_1 = copy_2 = filter2_2 = s_1 = nil_0 > map_2# = filter2_4# = filter_2# = cons_0 = filter2_1 = s_0 = n_0 > app# = filter2_0 partial status: pi(map_2#) = [] pi(cons_2) = [] pi(app#) = [1] pi(map_1) = [] pi(filter2_3) = [2, 3] pi(filter2_4#) = [2] pi(false_0) = [] pi(filter_2#) = [1] pi(filter_1) = [1] pi(app) = [1] pi(true_0) = [] pi(cons_0) = [] pi(cons_1) = [] pi(copy_0) = [] pi(copy_1) = [] pi(copy_2) = [] pi(filter2_0) = [] pi(filter2_1) = [] pi(filter2_2) = [] pi(s_0) = [] pi(s_1) = [] pi(f_1) = [] pi(nil_0) = [] pi(copy_3) = [] pi(n_0) = [] pi(filter_2) = [] The following rules are removed: p2 -- SCC decomposition. Consider the dependency pair problem (P, R), where P consists of p1: map_2#(|fun|,cons_2(x,xs)) -> app#(|fun|,x) p2: map_2#(|fun|,cons_2(x,xs)) -> map_2#(|fun|,xs) p3: app#(filter2_3(x1,x2,x3),y) -> filter2_4#(x1,x2,x3,y) p4: filter2_4#(false_0(),|fun|,x,xs) -> filter_2#(|fun|,xs) p5: filter_2#(|fun|,cons_2(x,xs)) -> app#(|fun|,x) p6: app#(filter_1(x1),y) -> filter_2#(x1,y) p7: filter_2#(|fun|,cons_2(x,xs)) -> filter2_4#(app(|fun|,x),|fun|,x,xs) p8: filter2_4#(true_0(),|fun|,x,xs) -> filter_2#(|fun|,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(copy_0(),y) -> copy_1(y) r4: app(copy_1(x1),y) -> copy_2(x1,y) r5: app(copy_2(x1,x2),y) -> copy_3(x1,x2,y) r6: app(f_0(),y) -> f_1(y) r7: app(filter_0(),y) -> filter_1(y) r8: app(filter_1(x1),y) -> filter_2(x1,y) r9: app(filter2_0(),y) -> filter2_1(y) r10: app(filter2_1(x1),y) -> filter2_2(x1,y) r11: app(filter2_2(x1,x2),y) -> filter2_3(x1,x2,y) r12: app(filter2_3(x1,x2,x3),y) -> filter2_4(x1,x2,x3,y) r13: app(map_0(),y) -> map_1(y) r14: app(map_1(x1),y) -> map_2(x1,y) r15: app(s_0(),y) -> s_1(y) r16: f_1(cons_2(nil_0(),y)) -> y r17: f_1(cons_2(f_1(cons_2(nil_0(),y)),z)) -> copy_3(n_0(),y,z) r18: copy_3(|0|_0(),y,z) -> f_1(z) r19: copy_3(s_1(x),y,z) -> copy_3(x,y,cons_2(f_1(y),z)) r20: map_2(|fun|,nil_0()) -> nil_0() r21: map_2(|fun|,cons_2(x,xs)) -> cons_2(app(|fun|,x),map_2(|fun|,xs)) r22: filter_2(|fun|,nil_0()) -> nil_0() r23: filter_2(|fun|,cons_2(x,xs)) -> filter2_4(app(|fun|,x),|fun|,x,xs) r24: filter2_4(true_0(),|fun|,x,xs) -> cons_2(x,filter_2(|fun|,xs)) r25: filter2_4(false_0(),|fun|,x,xs) -> filter_2(|fun|,xs) The estimated dependency graph contains the following SCCs: {p2} {p3, p4, p5, p6, p7, p8} -- Reduction pair. Consider the dependency pair problem (P, R), where P consists of p1: map_2#(|fun|,cons_2(x,xs)) -> map_2#(|fun|,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(copy_0(),y) -> copy_1(y) r4: app(copy_1(x1),y) -> copy_2(x1,y) r5: app(copy_2(x1,x2),y) -> copy_3(x1,x2,y) r6: app(f_0(),y) -> f_1(y) r7: app(filter_0(),y) -> filter_1(y) r8: app(filter_1(x1),y) -> filter_2(x1,y) r9: app(filter2_0(),y) -> filter2_1(y) r10: app(filter2_1(x1),y) -> filter2_2(x1,y) r11: app(filter2_2(x1,x2),y) -> filter2_3(x1,x2,y) r12: app(filter2_3(x1,x2,x3),y) -> filter2_4(x1,x2,x3,y) r13: app(map_0(),y) -> map_1(y) r14: app(map_1(x1),y) -> map_2(x1,y) r15: app(s_0(),y) -> s_1(y) r16: f_1(cons_2(nil_0(),y)) -> y r17: f_1(cons_2(f_1(cons_2(nil_0(),y)),z)) -> copy_3(n_0(),y,z) r18: copy_3(|0|_0(),y,z) -> f_1(z) r19: copy_3(s_1(x),y,z) -> copy_3(x,y,cons_2(f_1(y),z)) r20: map_2(|fun|,nil_0()) -> nil_0() r21: map_2(|fun|,cons_2(x,xs)) -> cons_2(app(|fun|,x),map_2(|fun|,xs)) r22: filter_2(|fun|,nil_0()) -> nil_0() r23: filter_2(|fun|,cons_2(x,xs)) -> filter2_4(app(|fun|,x),|fun|,x,xs) r24: filter2_4(true_0(),|fun|,x,xs) -> cons_2(x,filter_2(|fun|,xs)) r25: filter2_4(false_0(),|fun|,x,xs) -> filter_2(|fun|,xs) The set of usable rules consists of r1, r3, r4, r7, r9, r10, r11, r13, r15, r17, r22 Take the reduction pair: generalized weighted path order (>=MG, >MG) base order 1: max/plus interpretation on natural numbers: map_2#_A(x1,x2) = x2 + 25 cons_2_A(x1,x2) = max{x1 - 23, x2 + 26} app_A(x1,x2) = max{x1 - 9, x2 + 8} cons_0_A = 8 cons_1_A(x1) = max{3, x1 - 24} copy_0_A = 1 copy_1_A(x1) = max{2, x1 - 1} copy_2_A(x1,x2) = max{3, x1 - 11, x2 - 93} filter_0_A = 4 filter_1_A(x1) = max{5, x1 - 30} filter2_0_A = 1 filter2_1_A(x1) = max{5, x1 - 1} filter2_2_A(x1,x2) = max{6, x1 - 11, x2 - 1} filter2_3_A(x1,x2,x3) = max{7, x1 - 20, x2 - 10, x3 - 1} map_0_A = 7 map_1_A(x1) = max{8, x1 - 1} s_0_A = 1 s_1_A(x1) = max{6, x1 - 50} f_1_A(x1) = max{9, x1 - 52} nil_0_A = 2 copy_3_A(x1,x2,x3) = max{7, x1 - 49, x2 - 103, x3 - 27} n_0_A = 1 filter_2_A(x1,x2) = max{3, x1 - 40, x2 - 53} base order 2: precedence: app > cons_2 = f_1 = copy_3 > map_2# = cons_1 = copy_1 = copy_2 = map_1 = s_1 > cons_0 = copy_0 = filter2_3 = map_0 = s_0 = nil_0 = filter_2 > filter_1 = filter2_2 = n_0 > filter_0 = filter2_1 > filter2_0 partial status: pi(map_2#) = [2] pi(cons_2) = [2] pi(app) = [] pi(cons_0) = [] pi(cons_1) = [] pi(copy_0) = [] pi(copy_1) = [] pi(copy_2) = [] pi(filter_0) = [] pi(filter_1) = [] pi(filter2_0) = [] pi(filter2_1) = [] pi(filter2_2) = [] pi(filter2_3) = [] pi(map_0) = [] pi(map_1) = [] pi(s_0) = [] pi(s_1) = [] pi(f_1) = [] pi(nil_0) = [] pi(copy_3) = [] pi(n_0) = [] pi(filter_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: app#(filter2_3(x1,x2,x3),y) -> filter2_4#(x1,x2,x3,y) p2: filter2_4#(true_0(),|fun|,x,xs) -> filter_2#(|fun|,xs) p3: filter_2#(|fun|,cons_2(x,xs)) -> filter2_4#(app(|fun|,x),|fun|,x,xs) p4: filter2_4#(false_0(),|fun|,x,xs) -> filter_2#(|fun|,xs) p5: filter_2#(|fun|,cons_2(x,xs)) -> app#(|fun|,x) p6: app#(filter_1(x1),y) -> filter_2#(x1,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(copy_0(),y) -> copy_1(y) r4: app(copy_1(x1),y) -> copy_2(x1,y) r5: app(copy_2(x1,x2),y) -> copy_3(x1,x2,y) r6: app(f_0(),y) -> f_1(y) r7: app(filter_0(),y) -> filter_1(y) r8: app(filter_1(x1),y) -> filter_2(x1,y) r9: app(filter2_0(),y) -> filter2_1(y) r10: app(filter2_1(x1),y) -> filter2_2(x1,y) r11: app(filter2_2(x1,x2),y) -> filter2_3(x1,x2,y) r12: app(filter2_3(x1,x2,x3),y) -> filter2_4(x1,x2,x3,y) r13: app(map_0(),y) -> map_1(y) r14: app(map_1(x1),y) -> map_2(x1,y) r15: app(s_0(),y) -> s_1(y) r16: f_1(cons_2(nil_0(),y)) -> y r17: f_1(cons_2(f_1(cons_2(nil_0(),y)),z)) -> copy_3(n_0(),y,z) r18: copy_3(|0|_0(),y,z) -> f_1(z) r19: copy_3(s_1(x),y,z) -> copy_3(x,y,cons_2(f_1(y),z)) r20: map_2(|fun|,nil_0()) -> nil_0() r21: map_2(|fun|,cons_2(x,xs)) -> cons_2(app(|fun|,x),map_2(|fun|,xs)) r22: filter_2(|fun|,nil_0()) -> nil_0() r23: filter_2(|fun|,cons_2(x,xs)) -> filter2_4(app(|fun|,x),|fun|,x,xs) r24: filter2_4(true_0(),|fun|,x,xs) -> cons_2(x,filter_2(|fun|,xs)) r25: filter2_4(false_0(),|fun|,x,xs) -> filter_2(|fun|,xs) The set of usable rules consists of r1, r2, r3, r4, r9, r10, r13, r15, r17, r22 Take the reduction pair: generalized weighted path order (>=MG, >MG) base order 1: max/plus interpretation on natural numbers: app#_A(x1,x2) = x1 + 6 filter2_3_A(x1,x2,x3) = max{x2 + 7, x3 + 2} filter2_4#_A(x1,x2,x3,x4) = x2 + 7 true_0_A = 1 filter_2#_A(x1,x2) = x1 + 7 cons_2_A(x1,x2) = max{5, x1 - 44, x2 - 44} app_A(x1,x2) = max{42, x1 - 12, x2 - 12} false_0_A = 1 filter_1_A(x1) = x1 + 8 cons_0_A = 11 cons_1_A(x1) = max{4, x1 - 13} copy_0_A = 1 copy_1_A(x1) = max{2, x1 - 12} copy_2_A(x1,x2) = max{3, x1 - 25, x2 - 140} filter2_0_A = 1 filter2_1_A(x1) = max{2, x1 - 13} filter2_2_A(x1,x2) = max{13, x1 - 26, x2 - 13} map_0_A = 10 map_1_A(x1) = max{11, x1 - 57} s_0_A = 2 s_1_A(x1) = max{3, x1 - 38} f_1_A(x1) = max{5, x1 - 13} nil_0_A = 40 copy_3_A(x1,x2,x3) = max{4, x1 - 37, x2 - 139, x3 - 81} n_0_A = 0 filter_2_A(x1,x2) = max{41, x1 - 90, x2 - 46} base order 2: precedence: app > app# = filter2_3 = filter_1 = map_1 = filter_2 > filter2_4# = filter_2# = filter2_2 = map_0 = f_1 = copy_3 > cons_2 = false_0 = copy_2 = filter2_1 = nil_0 > true_0 = cons_1 = copy_1 = filter2_0 = s_1 = n_0 > cons_0 = copy_0 = s_0 partial status: pi(app#) = [1] pi(filter2_3) = [] pi(filter2_4#) = [] pi(true_0) = [] pi(filter_2#) = [] pi(cons_2) = [] pi(app) = [] pi(false_0) = [] pi(filter_1) = [] pi(cons_0) = [] pi(cons_1) = [] pi(copy_0) = [] pi(copy_1) = [] pi(copy_2) = [] pi(filter2_0) = [] pi(filter2_1) = [] pi(filter2_2) = [] pi(map_0) = [] pi(map_1) = [] pi(s_0) = [] pi(s_1) = [] pi(f_1) = [] pi(nil_0) = [] pi(copy_3) = [] pi(n_0) = [] pi(filter_2) = [] The following rules are removed: p6 -- SCC decomposition. Consider the dependency pair problem (P, R), where P consists of p1: app#(filter2_3(x1,x2,x3),y) -> filter2_4#(x1,x2,x3,y) p2: filter2_4#(true_0(),|fun|,x,xs) -> filter_2#(|fun|,xs) p3: filter_2#(|fun|,cons_2(x,xs)) -> filter2_4#(app(|fun|,x),|fun|,x,xs) p4: filter2_4#(false_0(),|fun|,x,xs) -> filter_2#(|fun|,xs) p5: filter_2#(|fun|,cons_2(x,xs)) -> app#(|fun|,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(copy_0(),y) -> copy_1(y) r4: app(copy_1(x1),y) -> copy_2(x1,y) r5: app(copy_2(x1,x2),y) -> copy_3(x1,x2,y) r6: app(f_0(),y) -> f_1(y) r7: app(filter_0(),y) -> filter_1(y) r8: app(filter_1(x1),y) -> filter_2(x1,y) r9: app(filter2_0(),y) -> filter2_1(y) r10: app(filter2_1(x1),y) -> filter2_2(x1,y) r11: app(filter2_2(x1,x2),y) -> filter2_3(x1,x2,y) r12: app(filter2_3(x1,x2,x3),y) -> filter2_4(x1,x2,x3,y) r13: app(map_0(),y) -> map_1(y) r14: app(map_1(x1),y) -> map_2(x1,y) r15: app(s_0(),y) -> s_1(y) r16: f_1(cons_2(nil_0(),y)) -> y r17: f_1(cons_2(f_1(cons_2(nil_0(),y)),z)) -> copy_3(n_0(),y,z) r18: copy_3(|0|_0(),y,z) -> f_1(z) r19: copy_3(s_1(x),y,z) -> copy_3(x,y,cons_2(f_1(y),z)) r20: map_2(|fun|,nil_0()) -> nil_0() r21: map_2(|fun|,cons_2(x,xs)) -> cons_2(app(|fun|,x),map_2(|fun|,xs)) r22: filter_2(|fun|,nil_0()) -> nil_0() r23: filter_2(|fun|,cons_2(x,xs)) -> filter2_4(app(|fun|,x),|fun|,x,xs) r24: filter2_4(true_0(),|fun|,x,xs) -> cons_2(x,filter_2(|fun|,xs)) r25: filter2_4(false_0(),|fun|,x,xs) -> filter_2(|fun|,xs) 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#(filter2_3(x1,x2,x3),y) -> filter2_4#(x1,x2,x3,y) p2: filter2_4#(false_0(),|fun|,x,xs) -> filter_2#(|fun|,xs) p3: filter_2#(|fun|,cons_2(x,xs)) -> app#(|fun|,x) p4: filter_2#(|fun|,cons_2(x,xs)) -> filter2_4#(app(|fun|,x),|fun|,x,xs) p5: filter2_4#(true_0(),|fun|,x,xs) -> filter_2#(|fun|,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(copy_0(),y) -> copy_1(y) r4: app(copy_1(x1),y) -> copy_2(x1,y) r5: app(copy_2(x1,x2),y) -> copy_3(x1,x2,y) r6: app(f_0(),y) -> f_1(y) r7: app(filter_0(),y) -> filter_1(y) r8: app(filter_1(x1),y) -> filter_2(x1,y) r9: app(filter2_0(),y) -> filter2_1(y) r10: app(filter2_1(x1),y) -> filter2_2(x1,y) r11: app(filter2_2(x1,x2),y) -> filter2_3(x1,x2,y) r12: app(filter2_3(x1,x2,x3),y) -> filter2_4(x1,x2,x3,y) r13: app(map_0(),y) -> map_1(y) r14: app(map_1(x1),y) -> map_2(x1,y) r15: app(s_0(),y) -> s_1(y) r16: f_1(cons_2(nil_0(),y)) -> y r17: f_1(cons_2(f_1(cons_2(nil_0(),y)),z)) -> copy_3(n_0(),y,z) r18: copy_3(|0|_0(),y,z) -> f_1(z) r19: copy_3(s_1(x),y,z) -> copy_3(x,y,cons_2(f_1(y),z)) r20: map_2(|fun|,nil_0()) -> nil_0() r21: map_2(|fun|,cons_2(x,xs)) -> cons_2(app(|fun|,x),map_2(|fun|,xs)) r22: filter_2(|fun|,nil_0()) -> nil_0() r23: filter_2(|fun|,cons_2(x,xs)) -> filter2_4(app(|fun|,x),|fun|,x,xs) r24: filter2_4(true_0(),|fun|,x,xs) -> cons_2(x,filter_2(|fun|,xs)) r25: filter2_4(false_0(),|fun|,x,xs) -> filter_2(|fun|,xs) The set of usable rules consists of r1, r3, r4, r7, r10, r13, r15, r17, r22 Take the reduction pair: generalized weighted path order (>=MG, >MG) base order 1: max/plus interpretation on natural numbers: app#_A(x1,x2) = max{6, x1 - 8} filter2_3_A(x1,x2,x3) = max{x1 + 29, x2 + 19, x3 + 19} filter2_4#_A(x1,x2,x3,x4) = max{10, x2 - 1} false_0_A = 11 filter_2#_A(x1,x2) = max{10, x1 - 1} cons_2_A(x1,x2) = max{5, x1 - 77, x2 - 46} app_A(x1,x2) = max{32, x1 - 22, x2 - 53} true_0_A = 4 cons_0_A = 1 cons_1_A(x1) = max{4, x1 - 54} copy_0_A = 1 copy_1_A(x1) = max{2, x1 - 54} copy_2_A(x1,x2) = max{3, x1 - 77, x2 - 208} filter_0_A = 1 filter_1_A(x1) = max{21, x1 - 54} filter2_1_A(x1) = max{33, x1 - 54} filter2_2_A(x1,x2) = max{21, x1 - 77, x2 - 54} map_0_A = 3 map_1_A(x1) = max{4, x1 - 54} s_0_A = 2 s_1_A(x1) = max{3, x1 - 178} f_1_A(x1) = max{32, x1 - 53} nil_0_A = 3 copy_3_A(x1,x2,x3) = max{4, x1 - 177, x2 - 231, x3 - 100} n_0_A = 0 filter_2_A(x1,x2) = max{45, x1 - 77, x2 - 54} base order 2: precedence: filter2_3 = filter_2 > false_0 = app > filter2_4# = filter_2# > app# = f_1 = copy_3 > cons_2 = copy_2 = filter_1 = filter2_2 = map_1 = s_1 = nil_0 > true_0 = cons_1 = copy_1 = filter_0 = filter2_1 = map_0 = s_0 = n_0 > cons_0 = copy_0 partial status: pi(app#) = [] pi(filter2_3) = [2] pi(filter2_4#) = [] pi(false_0) = [] pi(filter_2#) = [] pi(cons_2) = [] pi(app) = [] pi(true_0) = [] pi(cons_0) = [] pi(cons_1) = [] pi(copy_0) = [] pi(copy_1) = [] pi(copy_2) = [] pi(filter_0) = [] pi(filter_1) = [] pi(filter2_1) = [] pi(filter2_2) = [] pi(map_0) = [] pi(map_1) = [] pi(s_0) = [] pi(s_1) = [] pi(f_1) = [] pi(nil_0) = [] pi(copy_3) = [] pi(n_0) = [] pi(filter_2) = [] The following rules are removed: p1 -- SCC decomposition. Consider the dependency pair problem (P, R), where P consists of p1: filter2_4#(false_0(),|fun|,x,xs) -> filter_2#(|fun|,xs) p2: filter_2#(|fun|,cons_2(x,xs)) -> app#(|fun|,x) p3: filter_2#(|fun|,cons_2(x,xs)) -> filter2_4#(app(|fun|,x),|fun|,x,xs) p4: filter2_4#(true_0(),|fun|,x,xs) -> filter_2#(|fun|,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(copy_0(),y) -> copy_1(y) r4: app(copy_1(x1),y) -> copy_2(x1,y) r5: app(copy_2(x1,x2),y) -> copy_3(x1,x2,y) r6: app(f_0(),y) -> f_1(y) r7: app(filter_0(),y) -> filter_1(y) r8: app(filter_1(x1),y) -> filter_2(x1,y) r9: app(filter2_0(),y) -> filter2_1(y) r10: app(filter2_1(x1),y) -> filter2_2(x1,y) r11: app(filter2_2(x1,x2),y) -> filter2_3(x1,x2,y) r12: app(filter2_3(x1,x2,x3),y) -> filter2_4(x1,x2,x3,y) r13: app(map_0(),y) -> map_1(y) r14: app(map_1(x1),y) -> map_2(x1,y) r15: app(s_0(),y) -> s_1(y) r16: f_1(cons_2(nil_0(),y)) -> y r17: f_1(cons_2(f_1(cons_2(nil_0(),y)),z)) -> copy_3(n_0(),y,z) r18: copy_3(|0|_0(),y,z) -> f_1(z) r19: copy_3(s_1(x),y,z) -> copy_3(x,y,cons_2(f_1(y),z)) r20: map_2(|fun|,nil_0()) -> nil_0() r21: map_2(|fun|,cons_2(x,xs)) -> cons_2(app(|fun|,x),map_2(|fun|,xs)) r22: filter_2(|fun|,nil_0()) -> nil_0() r23: filter_2(|fun|,cons_2(x,xs)) -> filter2_4(app(|fun|,x),|fun|,x,xs) r24: filter2_4(true_0(),|fun|,x,xs) -> cons_2(x,filter_2(|fun|,xs)) r25: filter2_4(false_0(),|fun|,x,xs) -> filter_2(|fun|,xs) The estimated dependency graph contains the following SCCs: {p1, p3, p4} -- Reduction pair. Consider the dependency pair problem (P, R), where P consists of p1: filter2_4#(false_0(),|fun|,x,xs) -> filter_2#(|fun|,xs) p2: filter_2#(|fun|,cons_2(x,xs)) -> filter2_4#(app(|fun|,x),|fun|,x,xs) p3: filter2_4#(true_0(),|fun|,x,xs) -> filter_2#(|fun|,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(copy_0(),y) -> copy_1(y) r4: app(copy_1(x1),y) -> copy_2(x1,y) r5: app(copy_2(x1,x2),y) -> copy_3(x1,x2,y) r6: app(f_0(),y) -> f_1(y) r7: app(filter_0(),y) -> filter_1(y) r8: app(filter_1(x1),y) -> filter_2(x1,y) r9: app(filter2_0(),y) -> filter2_1(y) r10: app(filter2_1(x1),y) -> filter2_2(x1,y) r11: app(filter2_2(x1,x2),y) -> filter2_3(x1,x2,y) r12: app(filter2_3(x1,x2,x3),y) -> filter2_4(x1,x2,x3,y) r13: app(map_0(),y) -> map_1(y) r14: app(map_1(x1),y) -> map_2(x1,y) r15: app(s_0(),y) -> s_1(y) r16: f_1(cons_2(nil_0(),y)) -> y r17: f_1(cons_2(f_1(cons_2(nil_0(),y)),z)) -> copy_3(n_0(),y,z) r18: copy_3(|0|_0(),y,z) -> f_1(z) r19: copy_3(s_1(x),y,z) -> copy_3(x,y,cons_2(f_1(y),z)) r20: map_2(|fun|,nil_0()) -> nil_0() r21: map_2(|fun|,cons_2(x,xs)) -> cons_2(app(|fun|,x),map_2(|fun|,xs)) r22: filter_2(|fun|,nil_0()) -> nil_0() r23: filter_2(|fun|,cons_2(x,xs)) -> filter2_4(app(|fun|,x),|fun|,x,xs) r24: filter2_4(true_0(),|fun|,x,xs) -> cons_2(x,filter_2(|fun|,xs)) r25: filter2_4(false_0(),|fun|,x,xs) -> filter_2(|fun|,xs) The set of usable rules consists of r1, r3, r4, r7, r9, r10, r11, r13, r17, r22 Take the reduction pair: generalized weighted path order (>=MG, >MG) base order 1: max/plus interpretation on natural numbers: filter2_4#_A(x1,x2,x3,x4) = max{28, x2 - 1, x3 - 21, x4 + 23} false_0_A = 1 filter_2#_A(x1,x2) = max{28, x1 - 1, x2 + 21} cons_2_A(x1,x2) = max{6, x1 - 20, x2 + 2} app_A(x1,x2) = max{4, x1 - 44, x2 - 44} true_0_A = 4 cons_0_A = 1 cons_1_A(x1) = max{3, x1 - 45} copy_0_A = 1 copy_1_A(x1) = max{2, x1 - 45} copy_2_A(x1,x2) = max{3, x1 - 90, x2 - 45} filter_0_A = 2 filter_1_A(x1) = max{3, x1 - 45} filter2_0_A = 1 filter2_1_A(x1) = max{2, x1 - 45} filter2_2_A(x1,x2) = max{3, x1 - 90, x2 - 45} filter2_3_A(x1,x2,x3) = max{4, x1 - 134, x2 - 89, x3 - 44} map_0_A = 2 map_1_A(x1) = max{3, x1 - 45} f_1_A(x1) = max{6, x1 - 14} nil_0_A = 4 copy_3_A(x1,x2,x3) = max{5, x1 - 5, x2 - 90, x3 - 13} n_0_A = 0 filter_2_A(x1,x2) = max{5, x1 - 43, x2 - 7} base order 2: precedence: nil_0 = filter_2 > app > false_0 = cons_2 = cons_0 = filter_1 = filter2_0 = filter2_2 = filter2_3 = map_1 = f_1 = copy_3 > filter2_4# = filter_2# = cons_1 = copy_2 = filter_0 = filter2_1 = map_0 = n_0 > true_0 = copy_1 > copy_0 partial status: pi(filter2_4#) = [4] pi(false_0) = [] pi(filter_2#) = [2] pi(cons_2) = [2] pi(app) = [] pi(true_0) = [] pi(cons_0) = [] pi(cons_1) = [] pi(copy_0) = [] pi(copy_1) = [] pi(copy_2) = [] pi(filter_0) = [] pi(filter_1) = [] pi(filter2_0) = [] pi(filter2_1) = [] pi(filter2_2) = [] pi(filter2_3) = [] pi(map_0) = [] pi(map_1) = [] pi(f_1) = [] pi(nil_0) = [] pi(copy_3) = [] pi(n_0) = [] pi(filter_2) = [] The following rules are removed: p2 -- SCC decomposition. Consider the dependency pair problem (P, R), where P consists of p1: filter2_4#(false_0(),|fun|,x,xs) -> filter_2#(|fun|,xs) p2: filter2_4#(true_0(),|fun|,x,xs) -> filter_2#(|fun|,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(copy_0(),y) -> copy_1(y) r4: app(copy_1(x1),y) -> copy_2(x1,y) r5: app(copy_2(x1,x2),y) -> copy_3(x1,x2,y) r6: app(f_0(),y) -> f_1(y) r7: app(filter_0(),y) -> filter_1(y) r8: app(filter_1(x1),y) -> filter_2(x1,y) r9: app(filter2_0(),y) -> filter2_1(y) r10: app(filter2_1(x1),y) -> filter2_2(x1,y) r11: app(filter2_2(x1,x2),y) -> filter2_3(x1,x2,y) r12: app(filter2_3(x1,x2,x3),y) -> filter2_4(x1,x2,x3,y) r13: app(map_0(),y) -> map_1(y) r14: app(map_1(x1),y) -> map_2(x1,y) r15: app(s_0(),y) -> s_1(y) r16: f_1(cons_2(nil_0(),y)) -> y r17: f_1(cons_2(f_1(cons_2(nil_0(),y)),z)) -> copy_3(n_0(),y,z) r18: copy_3(|0|_0(),y,z) -> f_1(z) r19: copy_3(s_1(x),y,z) -> copy_3(x,y,cons_2(f_1(y),z)) r20: map_2(|fun|,nil_0()) -> nil_0() r21: map_2(|fun|,cons_2(x,xs)) -> cons_2(app(|fun|,x),map_2(|fun|,xs)) r22: filter_2(|fun|,nil_0()) -> nil_0() r23: filter_2(|fun|,cons_2(x,xs)) -> filter2_4(app(|fun|,x),|fun|,x,xs) r24: filter2_4(true_0(),|fun|,x,xs) -> cons_2(x,filter_2(|fun|,xs)) r25: filter2_4(false_0(),|fun|,x,xs) -> filter_2(|fun|,xs) The estimated dependency graph contains the following SCCs: (no SCCs) -- Reduction pair. Consider the dependency pair problem (P, R), where P consists of p1: copy_3#(s_1(x),y,z) -> copy_3#(x,y,cons_2(f_1(y),z)) and R consists of: r1: app(cons_0(),y) -> cons_1(y) r2: app(cons_1(x1),y) -> cons_2(x1,y) r3: app(copy_0(),y) -> copy_1(y) r4: app(copy_1(x1),y) -> copy_2(x1,y) r5: app(copy_2(x1,x2),y) -> copy_3(x1,x2,y) r6: app(f_0(),y) -> f_1(y) r7: app(filter_0(),y) -> filter_1(y) r8: app(filter_1(x1),y) -> filter_2(x1,y) r9: app(filter2_0(),y) -> filter2_1(y) r10: app(filter2_1(x1),y) -> filter2_2(x1,y) r11: app(filter2_2(x1,x2),y) -> filter2_3(x1,x2,y) r12: app(filter2_3(x1,x2,x3),y) -> filter2_4(x1,x2,x3,y) r13: app(map_0(),y) -> map_1(y) r14: app(map_1(x1),y) -> map_2(x1,y) r15: app(s_0(),y) -> s_1(y) r16: f_1(cons_2(nil_0(),y)) -> y r17: f_1(cons_2(f_1(cons_2(nil_0(),y)),z)) -> copy_3(n_0(),y,z) r18: copy_3(|0|_0(),y,z) -> f_1(z) r19: copy_3(s_1(x),y,z) -> copy_3(x,y,cons_2(f_1(y),z)) r20: map_2(|fun|,nil_0()) -> nil_0() r21: map_2(|fun|,cons_2(x,xs)) -> cons_2(app(|fun|,x),map_2(|fun|,xs)) r22: filter_2(|fun|,nil_0()) -> nil_0() r23: filter_2(|fun|,cons_2(x,xs)) -> filter2_4(app(|fun|,x),|fun|,x,xs) r24: filter2_4(true_0(),|fun|,x,xs) -> cons_2(x,filter_2(|fun|,xs)) r25: filter2_4(false_0(),|fun|,x,xs) -> filter_2(|fun|,xs) The set of usable rules consists of r1, r2, r3, r4, r7, r9, r10, r11, r13, r15, r17 Take the reduction pair: generalized weighted path order (>=MG, >MG) base order 1: max/plus interpretation on natural numbers: copy_3#_A(x1,x2,x3) = max{3, x1 + 2} s_1_A(x1) = max{3, x1 + 2} cons_2_A(x1,x2) = max{14, x1 - 33, x2 - 48} f_1_A(x1) = max{27, x1 - 15} app_A(x1,x2) = max{28, x1 - 30, x2 + 19} cons_0_A = 12 cons_1_A(x1) = max{13, x1 - 1} copy_0_A = 19 copy_1_A(x1) = max{20, x1 + 18} copy_2_A(x1,x2) = max{21, x1 - 13, x2 - 81} filter_0_A = 26 filter_1_A(x1) = max{27, x1 - 97} filter2_0_A = 19 filter2_1_A(x1) = max{20, x1 - 1} filter2_2_A(x1,x2) = max{21, x1 - 32, x2 - 1} filter2_3_A(x1,x2,x3) = max{27, x1 - 63, x2 - 32, x3 - 1} map_0_A = 60 map_1_A(x1) = max{29, x1 - 1} s_0_A = 1 nil_0_A = 18 copy_3_A(x1,x2,x3) = max{13, x1 - 75, x2 - 112, x3 - 65} n_0_A = 13 base order 2: precedence: app > cons_2 = f_1 = copy_3 > s_1 = cons_1 = copy_2 = filter2_3 = map_1 = nil_0 > copy_3# = cons_0 = copy_1 = filter2_2 = map_0 = s_0 = n_0 > copy_0 = filter_1 = filter2_1 > filter_0 = filter2_0 partial status: pi(copy_3#) = [1] pi(s_1) = [1] pi(cons_2) = [] pi(f_1) = [] pi(app) = [2] pi(cons_0) = [] pi(cons_1) = [] pi(copy_0) = [] pi(copy_1) = [1] pi(copy_2) = [] pi(filter_0) = [] pi(filter_1) = [] pi(filter2_0) = [] pi(filter2_1) = [] pi(filter2_2) = [] pi(filter2_3) = [] pi(map_0) = [] pi(map_1) = [] pi(s_0) = [] pi(nil_0) = [] pi(copy_3) = [] pi(n_0) = [] The following rules are removed: p1 Then no dependency pair remains.