YES We show the termination of the TRS R: app(f(),app(g(),x)) -> app(g(),app(g(),app(f(),x))) app(f(),app(g(),x)) -> app(g(),app(g(),app(g(),x))) 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(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(g_0(),y) -> g_1(y) app(map_0(),y) -> map_1(y) app(map_1(x1),y) -> map_2(x1,y) f_1(g_1(x)) -> g_1(g_1(f_1(x))) f_1(g_1(x)) -> g_1(g_1(g_1(x))) 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#(f_0(),y) -> f_1#(y) p2: app#(filter_1(x1),y) -> filter_2#(x1,y) p3: app#(filter2_3(x1,x2,x3),y) -> filter2_4#(x1,x2,x3,y) p4: app#(map_1(x1),y) -> map_2#(x1,y) p5: f_1#(g_1(x)) -> f_1#(x) p6: map_2#(|fun|,cons_2(x,xs)) -> app#(|fun|,x) p7: map_2#(|fun|,cons_2(x,xs)) -> map_2#(|fun|,xs) p8: filter_2#(|fun|,cons_2(x,xs)) -> filter2_4#(app(|fun|,x),|fun|,x,xs) p9: filter_2#(|fun|,cons_2(x,xs)) -> app#(|fun|,x) p10: filter2_4#(true_0(),|fun|,x,xs) -> filter_2#(|fun|,xs) p11: 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(f_0(),y) -> f_1(y) r4: app(filter_0(),y) -> filter_1(y) r5: app(filter_1(x1),y) -> filter_2(x1,y) r6: app(filter2_0(),y) -> filter2_1(y) r7: app(filter2_1(x1),y) -> filter2_2(x1,y) r8: app(filter2_2(x1,x2),y) -> filter2_3(x1,x2,y) r9: app(filter2_3(x1,x2,x3),y) -> filter2_4(x1,x2,x3,y) r10: app(g_0(),y) -> g_1(y) r11: app(map_0(),y) -> map_1(y) r12: app(map_1(x1),y) -> map_2(x1,y) r13: f_1(g_1(x)) -> g_1(g_1(f_1(x))) r14: f_1(g_1(x)) -> g_1(g_1(g_1(x))) r15: map_2(|fun|,nil_0()) -> nil_0() r16: map_2(|fun|,cons_2(x,xs)) -> cons_2(app(|fun|,x),map_2(|fun|,xs)) r17: filter_2(|fun|,nil_0()) -> nil_0() r18: filter_2(|fun|,cons_2(x,xs)) -> filter2_4(app(|fun|,x),|fun|,x,xs) r19: filter2_4(true_0(),|fun|,x,xs) -> cons_2(x,filter_2(|fun|,xs)) r20: filter2_4(false_0(),|fun|,x,xs) -> filter_2(|fun|,xs) The estimated dependency graph contains the following SCCs: {p2, p3, p4, p6, p7, p8, p9, p10, p11} {p5} -- 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(f_0(),y) -> f_1(y) r4: app(filter_0(),y) -> filter_1(y) r5: app(filter_1(x1),y) -> filter_2(x1,y) r6: app(filter2_0(),y) -> filter2_1(y) r7: app(filter2_1(x1),y) -> filter2_2(x1,y) r8: app(filter2_2(x1,x2),y) -> filter2_3(x1,x2,y) r9: app(filter2_3(x1,x2,x3),y) -> filter2_4(x1,x2,x3,y) r10: app(g_0(),y) -> g_1(y) r11: app(map_0(),y) -> map_1(y) r12: app(map_1(x1),y) -> map_2(x1,y) r13: f_1(g_1(x)) -> g_1(g_1(f_1(x))) r14: f_1(g_1(x)) -> g_1(g_1(g_1(x))) r15: map_2(|fun|,nil_0()) -> nil_0() r16: map_2(|fun|,cons_2(x,xs)) -> cons_2(app(|fun|,x),map_2(|fun|,xs)) r17: filter_2(|fun|,nil_0()) -> nil_0() r18: filter_2(|fun|,cons_2(x,xs)) -> filter2_4(app(|fun|,x),|fun|,x,xs) r19: filter2_4(true_0(),|fun|,x,xs) -> cons_2(x,filter_2(|fun|,xs)) r20: filter2_4(false_0(),|fun|,x,xs) -> filter_2(|fun|,xs) The set of usable rules consists of r1, r2, r6, r7, r10, r17 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 + 9 cons_2_A(x1,x2) = max{8, x1 - 30, x2 - 28} app#_A(x1,x2) = x1 + 4 map_1_A(x1) = x1 + 9 filter2_3_A(x1,x2,x3) = max{x1 + 1, x2 + 6, x3} filter2_4#_A(x1,x2,x3,x4) = x2 + 5 false_0_A = 1 filter_2#_A(x1,x2) = x1 + 5 filter_1_A(x1) = x1 + 42 app_A(x1,x2) = max{40, x1 - 14, x2 - 14} true_0_A = 1 cons_0_A = 1 cons_1_A(x1) = max{2, x1 - 15} filter2_0_A = 11 filter2_1_A(x1) = max{12, x1 - 15} filter2_2_A(x1,x2) = max{13, x1 - 30, x2 - 15} g_0_A = 1 g_1_A(x1) = max{2, x1 - 17} filter_2_A(x1,x2) = max{x1 - 14, x2 + 29} nil_0_A = 0 base order 2: precedence: filter_1 = cons_0 = filter_2 > cons_2 = map_1 = false_0 = nil_0 > map_2# > app# = true_0 > filter2_4# = filter_2# = app > filter2_3 = cons_1 = g_1 > filter2_2 = g_0 > filter2_1 > filter2_0 partial status: pi(map_2#) = [1] pi(cons_2) = [] pi(app#) = [1] pi(map_1) = [1] pi(filter2_3) = [2, 3] pi(filter2_4#) = [2] pi(false_0) = [] pi(filter_2#) = [1] pi(filter_1) = [1] pi(app) = [] pi(true_0) = [] pi(cons_0) = [] pi(cons_1) = [] pi(filter2_0) = [] pi(filter2_1) = [] pi(filter2_2) = [] pi(g_0) = [] pi(g_1) = [] pi(filter_2) = [] pi(nil_0) = [] The following rules are removed: p7 -- 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: 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: 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(f_0(),y) -> f_1(y) r4: app(filter_0(),y) -> filter_1(y) r5: app(filter_1(x1),y) -> filter_2(x1,y) r6: app(filter2_0(),y) -> filter2_1(y) r7: app(filter2_1(x1),y) -> filter2_2(x1,y) r8: app(filter2_2(x1,x2),y) -> filter2_3(x1,x2,y) r9: app(filter2_3(x1,x2,x3),y) -> filter2_4(x1,x2,x3,y) r10: app(g_0(),y) -> g_1(y) r11: app(map_0(),y) -> map_1(y) r12: app(map_1(x1),y) -> map_2(x1,y) r13: f_1(g_1(x)) -> g_1(g_1(f_1(x))) r14: f_1(g_1(x)) -> g_1(g_1(g_1(x))) r15: map_2(|fun|,nil_0()) -> nil_0() r16: map_2(|fun|,cons_2(x,xs)) -> cons_2(app(|fun|,x),map_2(|fun|,xs)) r17: filter_2(|fun|,nil_0()) -> nil_0() r18: filter_2(|fun|,cons_2(x,xs)) -> filter2_4(app(|fun|,x),|fun|,x,xs) r19: filter2_4(true_0(),|fun|,x,xs) -> cons_2(x,filter_2(|fun|,xs)) r20: filter2_4(false_0(),|fun|,x,xs) -> filter_2(|fun|,xs) The estimated dependency graph contains the following SCCs: {p1, 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)) -> app#(|fun|,x) p2: app#(filter2_3(x1,x2,x3),y) -> filter2_4#(x1,x2,x3,y) p3: filter2_4#(true_0(),|fun|,x,xs) -> filter_2#(|fun|,xs) p4: filter_2#(|fun|,cons_2(x,xs)) -> filter2_4#(app(|fun|,x),|fun|,x,xs) 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#(map_1(x1),y) -> map_2#(x1,y) p8: 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(f_0(),y) -> f_1(y) r4: app(filter_0(),y) -> filter_1(y) r5: app(filter_1(x1),y) -> filter_2(x1,y) r6: app(filter2_0(),y) -> filter2_1(y) r7: app(filter2_1(x1),y) -> filter2_2(x1,y) r8: app(filter2_2(x1,x2),y) -> filter2_3(x1,x2,y) r9: app(filter2_3(x1,x2,x3),y) -> filter2_4(x1,x2,x3,y) r10: app(g_0(),y) -> g_1(y) r11: app(map_0(),y) -> map_1(y) r12: app(map_1(x1),y) -> map_2(x1,y) r13: f_1(g_1(x)) -> g_1(g_1(f_1(x))) r14: f_1(g_1(x)) -> g_1(g_1(g_1(x))) r15: map_2(|fun|,nil_0()) -> nil_0() r16: map_2(|fun|,cons_2(x,xs)) -> cons_2(app(|fun|,x),map_2(|fun|,xs)) r17: filter_2(|fun|,nil_0()) -> nil_0() r18: filter_2(|fun|,cons_2(x,xs)) -> filter2_4(app(|fun|,x),|fun|,x,xs) r19: filter2_4(true_0(),|fun|,x,xs) -> cons_2(x,filter_2(|fun|,xs)) r20: filter2_4(false_0(),|fun|,x,xs) -> filter_2(|fun|,xs) The set of usable rules consists of r1, r7, r10, r17 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 + 7 cons_2_A(x1,x2) = max{40, x1 - 30, x2 - 30} app#_A(x1,x2) = max{5, x1 - 1} filter2_3_A(x1,x2,x3) = max{x1 + 2, x2 + 8, x3 + 2} filter2_4#_A(x1,x2,x3,x4) = x2 + 6 true_0_A = 3 filter_2#_A(x1,x2) = x1 + 6 app_A(x1,x2) = max{11, x1 - 14, x2 - 14} false_0_A = 5 map_1_A(x1) = max{12, x1 + 9} cons_0_A = 9 cons_1_A(x1) = max{10, x1 - 15} filter2_1_A(x1) = max{12, x1 - 1} filter2_2_A(x1,x2) = max{1, x1 - 15, x2 - 15} g_0_A = 1 g_1_A(x1) = max{2, x1 - 17} filter_2_A(x1,x2) = max{6, x1 - 86, x2 - 30} nil_0_A = 0 base order 2: precedence: filter2_4# = filter_2# > cons_2 > app > filter2_3 = map_1 = cons_1 = g_1 = filter_2 > map_2# = true_0 = false_0 = cons_0 = filter2_2 = g_0 = nil_0 > app# = filter2_1 partial status: pi(map_2#) = [1] pi(cons_2) = [] pi(app#) = [] pi(filter2_3) = [2, 3] pi(filter2_4#) = [2] pi(true_0) = [] pi(filter_2#) = [1] pi(app) = [] pi(false_0) = [] pi(map_1) = [1] pi(cons_0) = [] pi(cons_1) = [] pi(filter2_1) = [] pi(filter2_2) = [] pi(g_0) = [] pi(g_1) = [] pi(filter_2) = [] pi(nil_0) = [] The following rules are removed: p7 -- 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: app#(filter2_3(x1,x2,x3),y) -> filter2_4#(x1,x2,x3,y) p3: filter2_4#(true_0(),|fun|,x,xs) -> filter_2#(|fun|,xs) p4: filter_2#(|fun|,cons_2(x,xs)) -> filter2_4#(app(|fun|,x),|fun|,x,xs) p5: filter2_4#(false_0(),|fun|,x,xs) -> filter_2#(|fun|,xs) p6: filter_2#(|fun|,cons_2(x,xs)) -> app#(|fun|,x) p7: 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(f_0(),y) -> f_1(y) r4: app(filter_0(),y) -> filter_1(y) r5: app(filter_1(x1),y) -> filter_2(x1,y) r6: app(filter2_0(),y) -> filter2_1(y) r7: app(filter2_1(x1),y) -> filter2_2(x1,y) r8: app(filter2_2(x1,x2),y) -> filter2_3(x1,x2,y) r9: app(filter2_3(x1,x2,x3),y) -> filter2_4(x1,x2,x3,y) r10: app(g_0(),y) -> g_1(y) r11: app(map_0(),y) -> map_1(y) r12: app(map_1(x1),y) -> map_2(x1,y) r13: f_1(g_1(x)) -> g_1(g_1(f_1(x))) r14: f_1(g_1(x)) -> g_1(g_1(g_1(x))) r15: map_2(|fun|,nil_0()) -> nil_0() r16: map_2(|fun|,cons_2(x,xs)) -> cons_2(app(|fun|,x),map_2(|fun|,xs)) r17: filter_2(|fun|,nil_0()) -> nil_0() r18: filter_2(|fun|,cons_2(x,xs)) -> filter2_4(app(|fun|,x),|fun|,x,xs) r19: filter2_4(true_0(),|fun|,x,xs) -> cons_2(x,filter_2(|fun|,xs)) r20: filter2_4(false_0(),|fun|,x,xs) -> filter_2(|fun|,xs) The estimated dependency graph contains the following SCCs: {p7} {p2, p3, p4, p5, p6} -- 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(f_0(),y) -> f_1(y) r4: app(filter_0(),y) -> filter_1(y) r5: app(filter_1(x1),y) -> filter_2(x1,y) r6: app(filter2_0(),y) -> filter2_1(y) r7: app(filter2_1(x1),y) -> filter2_2(x1,y) r8: app(filter2_2(x1,x2),y) -> filter2_3(x1,x2,y) r9: app(filter2_3(x1,x2,x3),y) -> filter2_4(x1,x2,x3,y) r10: app(g_0(),y) -> g_1(y) r11: app(map_0(),y) -> map_1(y) r12: app(map_1(x1),y) -> map_2(x1,y) r13: f_1(g_1(x)) -> g_1(g_1(f_1(x))) r14: f_1(g_1(x)) -> g_1(g_1(g_1(x))) r15: map_2(|fun|,nil_0()) -> nil_0() r16: map_2(|fun|,cons_2(x,xs)) -> cons_2(app(|fun|,x),map_2(|fun|,xs)) r17: filter_2(|fun|,nil_0()) -> nil_0() r18: filter_2(|fun|,cons_2(x,xs)) -> filter2_4(app(|fun|,x),|fun|,x,xs) r19: filter2_4(true_0(),|fun|,x,xs) -> cons_2(x,filter_2(|fun|,xs)) r20: filter2_4(false_0(),|fun|,x,xs) -> filter_2(|fun|,xs) The set of usable rules consists of r1, r4, r6, r7, r8, r10, r11, r17 Take the reduction pair: generalized weighted path order (>=MG, >MG) base order 1: max/plus interpretation on natural numbers: map_2#_A(x1,x2) = max{16, x2} cons_2_A(x1,x2) = max{16, x1 + 9, x2 + 11} app_A(x1,x2) = max{14, x1 - 16, x2 - 10} cons_0_A = 15 cons_1_A(x1) = max{14, x1 - 11} filter_0_A = 17 filter_1_A(x1) = max{13, x1 - 11} filter2_0_A = 12 filter2_1_A(x1) = max{13, x1 - 11} filter2_2_A(x1,x2) = max{14, x1 - 28, x2 - 10} filter2_3_A(x1,x2,x3) = max{14, x1 - 44, x2 - 26, x3 - 10} g_0_A = 12 g_1_A(x1) = max{13, x1 - 10} map_0_A = 12 map_1_A(x1) = max{13, x1 - 17} filter_2_A(x1,x2) = max{14, x1 - 16, x2 - 18} nil_0_A = 9 base order 2: precedence: cons_2 > map_2# = filter_2 = nil_0 > app > cons_1 = filter_1 = filter2_3 = g_1 = map_1 > cons_0 = filter_0 = filter2_2 = g_0 = map_0 > filter2_1 > filter2_0 partial status: pi(map_2#) = [2] pi(cons_2) = [2] pi(app) = [] pi(cons_0) = [] pi(cons_1) = [] pi(filter_0) = [] pi(filter_1) = [] pi(filter2_0) = [] pi(filter2_1) = [] pi(filter2_2) = [] pi(filter2_3) = [] pi(g_0) = [] pi(g_1) = [] pi(map_0) = [] pi(map_1) = [] pi(filter_2) = [] pi(nil_0) = [] 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#(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(f_0(),y) -> f_1(y) r4: app(filter_0(),y) -> filter_1(y) r5: app(filter_1(x1),y) -> filter_2(x1,y) r6: app(filter2_0(),y) -> filter2_1(y) r7: app(filter2_1(x1),y) -> filter2_2(x1,y) r8: app(filter2_2(x1,x2),y) -> filter2_3(x1,x2,y) r9: app(filter2_3(x1,x2,x3),y) -> filter2_4(x1,x2,x3,y) r10: app(g_0(),y) -> g_1(y) r11: app(map_0(),y) -> map_1(y) r12: app(map_1(x1),y) -> map_2(x1,y) r13: f_1(g_1(x)) -> g_1(g_1(f_1(x))) r14: f_1(g_1(x)) -> g_1(g_1(g_1(x))) r15: map_2(|fun|,nil_0()) -> nil_0() r16: map_2(|fun|,cons_2(x,xs)) -> cons_2(app(|fun|,x),map_2(|fun|,xs)) r17: filter_2(|fun|,nil_0()) -> nil_0() r18: filter_2(|fun|,cons_2(x,xs)) -> filter2_4(app(|fun|,x),|fun|,x,xs) r19: filter2_4(true_0(),|fun|,x,xs) -> cons_2(x,filter_2(|fun|,xs)) r20: filter2_4(false_0(),|fun|,x,xs) -> filter_2(|fun|,xs) The set of usable rules consists of r1, r2, r4, r6, r7, r11, r17 Take the reduction pair: generalized weighted path order (>=MG, >MG) base order 1: max/plus interpretation on natural numbers: app#_A(x1,x2) = max{5, x1 - 3} filter2_3_A(x1,x2,x3) = max{x1 + 10, x2 + 2, x3 + 12} filter2_4#_A(x1,x2,x3,x4) = max{6, x2 - 2} false_0_A = 1 filter_2#_A(x1,x2) = max{6, x1 - 2} cons_2_A(x1,x2) = max{4, x1 - 27, x2 - 27} app_A(x1,x2) = max{14, x1 - 11, x2 - 11} true_0_A = 1 cons_0_A = 2 cons_1_A(x1) = max{3, x1 - 12} filter_0_A = 9 filter_1_A(x1) = max{10, x1 - 12} filter2_0_A = 9 filter2_1_A(x1) = max{10, x1 - 12} filter2_2_A(x1,x2) = max{1, x1 - 24, x2 - 12} map_0_A = 1 map_1_A(x1) = max{2, x1 - 15} filter_2_A(x1,x2) = max{14, x1 - 27, x2 - 11} nil_0_A = 0 base order 2: precedence: filter2_2 > app# = app > filter2_4# = filter_2# = map_1 > cons_2 > filter2_3 = cons_1 = filter2_1 = map_0 = filter_2 > false_0 = true_0 = cons_0 = filter_1 = filter2_0 = nil_0 > filter_0 partial status: pi(app#) = [] pi(filter2_3) = [3] pi(filter2_4#) = [] pi(false_0) = [] pi(filter_2#) = [] pi(cons_2) = [] pi(app) = [] pi(true_0) = [] pi(cons_0) = [] pi(cons_1) = [] pi(filter_0) = [] pi(filter_1) = [] pi(filter2_0) = [] pi(filter2_1) = [] pi(filter2_2) = [] pi(map_0) = [] pi(map_1) = [] pi(filter_2) = [] pi(nil_0) = [] The following rules are removed: p3 -- 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#(false_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#(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(f_0(),y) -> f_1(y) r4: app(filter_0(),y) -> filter_1(y) r5: app(filter_1(x1),y) -> filter_2(x1,y) r6: app(filter2_0(),y) -> filter2_1(y) r7: app(filter2_1(x1),y) -> filter2_2(x1,y) r8: app(filter2_2(x1,x2),y) -> filter2_3(x1,x2,y) r9: app(filter2_3(x1,x2,x3),y) -> filter2_4(x1,x2,x3,y) r10: app(g_0(),y) -> g_1(y) r11: app(map_0(),y) -> map_1(y) r12: app(map_1(x1),y) -> map_2(x1,y) r13: f_1(g_1(x)) -> g_1(g_1(f_1(x))) r14: f_1(g_1(x)) -> g_1(g_1(g_1(x))) r15: map_2(|fun|,nil_0()) -> nil_0() r16: map_2(|fun|,cons_2(x,xs)) -> cons_2(app(|fun|,x),map_2(|fun|,xs)) r17: filter_2(|fun|,nil_0()) -> nil_0() r18: filter_2(|fun|,cons_2(x,xs)) -> filter2_4(app(|fun|,x),|fun|,x,xs) r19: filter2_4(true_0(),|fun|,x,xs) -> cons_2(x,filter_2(|fun|,xs)) r20: filter2_4(false_0(),|fun|,x,xs) -> filter_2(|fun|,xs) The estimated dependency graph contains the following SCCs: {p2, 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(f_0(),y) -> f_1(y) r4: app(filter_0(),y) -> filter_1(y) r5: app(filter_1(x1),y) -> filter_2(x1,y) r6: app(filter2_0(),y) -> filter2_1(y) r7: app(filter2_1(x1),y) -> filter2_2(x1,y) r8: app(filter2_2(x1,x2),y) -> filter2_3(x1,x2,y) r9: app(filter2_3(x1,x2,x3),y) -> filter2_4(x1,x2,x3,y) r10: app(g_0(),y) -> g_1(y) r11: app(map_0(),y) -> map_1(y) r12: app(map_1(x1),y) -> map_2(x1,y) r13: f_1(g_1(x)) -> g_1(g_1(f_1(x))) r14: f_1(g_1(x)) -> g_1(g_1(g_1(x))) r15: map_2(|fun|,nil_0()) -> nil_0() r16: map_2(|fun|,cons_2(x,xs)) -> cons_2(app(|fun|,x),map_2(|fun|,xs)) r17: filter_2(|fun|,nil_0()) -> nil_0() r18: filter_2(|fun|,cons_2(x,xs)) -> filter2_4(app(|fun|,x),|fun|,x,xs) r19: filter2_4(true_0(),|fun|,x,xs) -> cons_2(x,filter_2(|fun|,xs)) r20: filter2_4(false_0(),|fun|,x,xs) -> filter_2(|fun|,xs) The set of usable rules consists of r1, r6, r7, r8, r17 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{x2 - 9, x3 + 8, x4 + 42} false_0_A = 1 filter_2#_A(x1,x2) = max{x1 - 9, x2 + 31} cons_2_A(x1,x2) = max{30, x1 + 1, x2 + 11} app_A(x1,x2) = 6 true_0_A = 8 cons_0_A = 9 cons_1_A(x1) = 1 filter2_0_A = 6 filter2_1_A(x1) = 5 filter2_2_A(x1,x2) = 0 filter2_3_A(x1,x2,x3) = 0 filter_2_A(x1,x2) = max{17, x2 + 4} nil_0_A = 0 base order 2: precedence: filter2_4# = filter_2# > cons_2 > app = cons_0 = filter2_0 = filter_2 > false_0 = true_0 = cons_1 = filter2_1 > filter2_2 = nil_0 > filter2_3 partial status: pi(filter2_4#) = [4] pi(false_0) = [] pi(filter_2#) = [2] pi(cons_2) = [1, 2] pi(app) = [] pi(true_0) = [] pi(cons_0) = [] pi(cons_1) = [] pi(filter2_0) = [] pi(filter2_1) = [] pi(filter2_2) = [] pi(filter2_3) = [] pi(filter_2) = [2] pi(nil_0) = [] 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(f_0(),y) -> f_1(y) r4: app(filter_0(),y) -> filter_1(y) r5: app(filter_1(x1),y) -> filter_2(x1,y) r6: app(filter2_0(),y) -> filter2_1(y) r7: app(filter2_1(x1),y) -> filter2_2(x1,y) r8: app(filter2_2(x1,x2),y) -> filter2_3(x1,x2,y) r9: app(filter2_3(x1,x2,x3),y) -> filter2_4(x1,x2,x3,y) r10: app(g_0(),y) -> g_1(y) r11: app(map_0(),y) -> map_1(y) r12: app(map_1(x1),y) -> map_2(x1,y) r13: f_1(g_1(x)) -> g_1(g_1(f_1(x))) r14: f_1(g_1(x)) -> g_1(g_1(g_1(x))) r15: map_2(|fun|,nil_0()) -> nil_0() r16: map_2(|fun|,cons_2(x,xs)) -> cons_2(app(|fun|,x),map_2(|fun|,xs)) r17: filter_2(|fun|,nil_0()) -> nil_0() r18: filter_2(|fun|,cons_2(x,xs)) -> filter2_4(app(|fun|,x),|fun|,x,xs) r19: filter2_4(true_0(),|fun|,x,xs) -> cons_2(x,filter_2(|fun|,xs)) r20: 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: f_1#(g_1(x)) -> f_1#(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(f_0(),y) -> f_1(y) r4: app(filter_0(),y) -> filter_1(y) r5: app(filter_1(x1),y) -> filter_2(x1,y) r6: app(filter2_0(),y) -> filter2_1(y) r7: app(filter2_1(x1),y) -> filter2_2(x1,y) r8: app(filter2_2(x1,x2),y) -> filter2_3(x1,x2,y) r9: app(filter2_3(x1,x2,x3),y) -> filter2_4(x1,x2,x3,y) r10: app(g_0(),y) -> g_1(y) r11: app(map_0(),y) -> map_1(y) r12: app(map_1(x1),y) -> map_2(x1,y) r13: f_1(g_1(x)) -> g_1(g_1(f_1(x))) r14: f_1(g_1(x)) -> g_1(g_1(g_1(x))) r15: map_2(|fun|,nil_0()) -> nil_0() r16: map_2(|fun|,cons_2(x,xs)) -> cons_2(app(|fun|,x),map_2(|fun|,xs)) r17: filter_2(|fun|,nil_0()) -> nil_0() r18: filter_2(|fun|,cons_2(x,xs)) -> filter2_4(app(|fun|,x),|fun|,x,xs) r19: filter2_4(true_0(),|fun|,x,xs) -> cons_2(x,filter_2(|fun|,xs)) r20: filter2_4(false_0(),|fun|,x,xs) -> filter_2(|fun|,xs) The set of usable rules consists of r1, r2, r4, r6, r7, r8, r11, r17 Take the reduction pair: generalized weighted path order (>=MG, >MG) base order 1: max/plus interpretation on natural numbers: f_1#_A(x1) = x1 + 1 g_1_A(x1) = max{6, x1 + 2} app_A(x1,x2) = max{20, x1 - 9, x2 - 9} cons_0_A = 8 cons_1_A(x1) = max{7, x1 - 10} cons_2_A(x1,x2) = max{6, x1 - 21, x2 - 10} filter_0_A = 4 filter_1_A(x1) = max{5, x1 - 10} filter2_0_A = 1 filter2_1_A(x1) = max{2, x1 - 10} filter2_2_A(x1,x2) = max{3, x1 - 21, x2 - 10} filter2_3_A(x1,x2,x3) = max{4, x1 - 30, x2 - 20, x3 - 9} map_0_A = 8 map_1_A(x1) = 7 filter_2_A(x1,x2) = max{6, x1 - 21, x2 - 27} nil_0_A = 0 base order 2: precedence: g_1 > app = map_0 > f_1# = map_1 = filter_2 > cons_1 = cons_2 = filter_1 = nil_0 > cons_0 = filter_0 = filter2_3 > filter2_2 > filter2_1 > filter2_0 partial status: pi(f_1#) = [1] pi(g_1) = [1] pi(app) = [] pi(cons_0) = [] pi(cons_1) = [] pi(cons_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(filter_2) = [] pi(nil_0) = [] The following rules are removed: p1 Then no dependency pair remains.