YES We show the termination of the TRS R: app(app(times(),x),app(app(plus(),y),app(s(),z))) -> app(app(plus(),app(app(times(),x),app(app(plus(),y),app(app(times(),app(s(),z)),|0|())))),app(app(times(),x),app(s(),z))) app(app(times(),x),|0|()) -> |0|() app(app(times(),x),app(s(),y)) -> app(app(plus(),app(app(times(),x),y)),x) app(app(plus(),x),|0|()) -> x app(app(plus(),x),app(s(),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(filter(),f),nil()) -> nil() app(app(filter(),f),app(app(cons(),x),xs)) -> app(app(app(app(filter2(),app(f,x)),f),x),xs) app(app(app(app(filter2(),true()),f),x),xs) -> app(app(cons(),x),app(app(filter(),f),xs)) app(app(app(app(filter2(),false()),f),x),xs) -> app(app(filter(),f),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(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(plus_0(),y) -> plus_1(y) app(plus_1(x1),y) -> plus_2(x1,y) app(s_0(),y) -> s_1(y) app(times_0(),y) -> times_1(y) app(times_1(x1),y) -> times_2(x1,y) times_2(x,plus_2(y,s_1(z))) -> plus_2(times_2(x,plus_2(y,times_2(s_1(z),|0|_0()))),times_2(x,s_1(z))) times_2(x,|0|_0()) -> |0|_0() times_2(x,s_1(y)) -> plus_2(times_2(x,y),x) plus_2(x,|0|_0()) -> x plus_2(x,s_1(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)) filter_2(f,nil_0()) -> nil_0() filter_2(f,cons_2(x,xs)) -> filter2_4(app(f,x),f,x,xs) filter2_4(true_0(),f,x,xs) -> cons_2(x,filter_2(f,xs)) filter2_4(false_0(),f,x,xs) -> filter_2(f,xs) -- SCC decomposition. Consider the dependency pair problem (P, R), where P consists of p1: app#(filter_1(x1),y) -> filter_2#(x1,y) p2: app#(filter2_3(x1,x2,x3),y) -> filter2_4#(x1,x2,x3,y) p3: app#(map_1(x1),y) -> map_2#(x1,y) p4: app#(plus_1(x1),y) -> plus_2#(x1,y) p5: app#(times_1(x1),y) -> times_2#(x1,y) p6: times_2#(x,plus_2(y,s_1(z))) -> plus_2#(times_2(x,plus_2(y,times_2(s_1(z),|0|_0()))),times_2(x,s_1(z))) p7: times_2#(x,plus_2(y,s_1(z))) -> times_2#(x,plus_2(y,times_2(s_1(z),|0|_0()))) p8: times_2#(x,plus_2(y,s_1(z))) -> plus_2#(y,times_2(s_1(z),|0|_0())) p9: times_2#(x,plus_2(y,s_1(z))) -> times_2#(s_1(z),|0|_0()) p10: times_2#(x,plus_2(y,s_1(z))) -> times_2#(x,s_1(z)) p11: times_2#(x,s_1(y)) -> plus_2#(times_2(x,y),x) p12: times_2#(x,s_1(y)) -> times_2#(x,y) p13: plus_2#(x,s_1(y)) -> plus_2#(x,y) p14: map_2#(f,cons_2(x,xs)) -> app#(f,x) p15: map_2#(f,cons_2(x,xs)) -> map_2#(f,xs) p16: filter_2#(f,cons_2(x,xs)) -> filter2_4#(app(f,x),f,x,xs) p17: filter_2#(f,cons_2(x,xs)) -> app#(f,x) p18: filter2_4#(true_0(),f,x,xs) -> filter_2#(f,xs) p19: filter2_4#(false_0(),f,x,xs) -> filter_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(filter_0(),y) -> filter_1(y) r4: app(filter_1(x1),y) -> filter_2(x1,y) r5: app(filter2_0(),y) -> filter2_1(y) r6: app(filter2_1(x1),y) -> filter2_2(x1,y) r7: app(filter2_2(x1,x2),y) -> filter2_3(x1,x2,y) r8: app(filter2_3(x1,x2,x3),y) -> filter2_4(x1,x2,x3,y) r9: app(map_0(),y) -> map_1(y) r10: app(map_1(x1),y) -> map_2(x1,y) r11: app(plus_0(),y) -> plus_1(y) r12: app(plus_1(x1),y) -> plus_2(x1,y) r13: app(s_0(),y) -> s_1(y) r14: app(times_0(),y) -> times_1(y) r15: app(times_1(x1),y) -> times_2(x1,y) r16: times_2(x,plus_2(y,s_1(z))) -> plus_2(times_2(x,plus_2(y,times_2(s_1(z),|0|_0()))),times_2(x,s_1(z))) r17: times_2(x,|0|_0()) -> |0|_0() r18: times_2(x,s_1(y)) -> plus_2(times_2(x,y),x) r19: plus_2(x,|0|_0()) -> x r20: plus_2(x,s_1(y)) -> s_1(plus_2(x,y)) r21: map_2(f,nil_0()) -> nil_0() r22: map_2(f,cons_2(x,xs)) -> cons_2(app(f,x),map_2(f,xs)) r23: filter_2(f,nil_0()) -> nil_0() r24: filter_2(f,cons_2(x,xs)) -> filter2_4(app(f,x),f,x,xs) r25: filter2_4(true_0(),f,x,xs) -> cons_2(x,filter_2(f,xs)) r26: filter2_4(false_0(),f,x,xs) -> filter_2(f,xs) The estimated dependency graph contains the following SCCs: {p1, p2, p3, p14, p15, p16, p17, p18, p19} {p7, p10, p12} {p13} -- Reduction pair. Consider the dependency pair problem (P, R), where P consists of p1: app#(filter_1(x1),y) -> filter_2#(x1,y) p2: filter_2#(f,cons_2(x,xs)) -> app#(f,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: app#(filter2_3(x1,x2,x3),y) -> filter2_4#(x1,x2,x3,y) p7: filter2_4#(false_0(),f,x,xs) -> filter_2#(f,xs) p8: filter_2#(f,cons_2(x,xs)) -> filter2_4#(app(f,x),f,x,xs) p9: filter2_4#(true_0(),f,x,xs) -> filter_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(filter_0(),y) -> filter_1(y) r4: app(filter_1(x1),y) -> filter_2(x1,y) r5: app(filter2_0(),y) -> filter2_1(y) r6: app(filter2_1(x1),y) -> filter2_2(x1,y) r7: app(filter2_2(x1,x2),y) -> filter2_3(x1,x2,y) r8: app(filter2_3(x1,x2,x3),y) -> filter2_4(x1,x2,x3,y) r9: app(map_0(),y) -> map_1(y) r10: app(map_1(x1),y) -> map_2(x1,y) r11: app(plus_0(),y) -> plus_1(y) r12: app(plus_1(x1),y) -> plus_2(x1,y) r13: app(s_0(),y) -> s_1(y) r14: app(times_0(),y) -> times_1(y) r15: app(times_1(x1),y) -> times_2(x1,y) r16: times_2(x,plus_2(y,s_1(z))) -> plus_2(times_2(x,plus_2(y,times_2(s_1(z),|0|_0()))),times_2(x,s_1(z))) r17: times_2(x,|0|_0()) -> |0|_0() r18: times_2(x,s_1(y)) -> plus_2(times_2(x,y),x) r19: plus_2(x,|0|_0()) -> x r20: plus_2(x,s_1(y)) -> s_1(plus_2(x,y)) r21: map_2(f,nil_0()) -> nil_0() r22: map_2(f,cons_2(x,xs)) -> cons_2(app(f,x),map_2(f,xs)) r23: filter_2(f,nil_0()) -> nil_0() r24: filter_2(f,cons_2(x,xs)) -> filter2_4(app(f,x),f,x,xs) r25: filter2_4(true_0(),f,x,xs) -> cons_2(x,filter_2(f,xs)) r26: filter2_4(false_0(),f,x,xs) -> filter_2(f,xs) 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: app#_A(x1,x2) = max{3, x1 + 1} filter_1_A(x1) = x1 + 26 filter_2#_A(x1,x2) = max{6, x1 + 2} cons_2_A(x1,x2) = 5 map_1_A(x1) = x1 + 33 map_2#_A(x1,x2) = max{18, x1 + 2} filter2_3_A(x1,x2,x3) = max{20, x1 - 2, x2 + 18, x3 - 2} filter2_4#_A(x1,x2,x3,x4) = max{6, x2 + 2} false_0_A = 5 app_A(x1,x2) = max{11, x1 - 17, x2 + 4} true_0_A = 7 base order 2: marked-algebra reduction triple (>=A, >=A!, >A!): max/plus interpretation on natural numbers: app#_A(x1,x2) = max{1, x2 - 3} filter_1_A(x1) = max{30, x1 - 52} filter_2#_A(x1,x2) = max{1, x2 - 127} cons_2_A(x1,x2) = max{127, x1 + 125, x2} map_1_A(x1) = x1 + 17 map_2#_A(x1,x2) = max{1, x2 - 128} filter2_3_A(x1,x2,x3) = max{x1 + 34, x2 + 18, x3 + 30} filter2_4#_A(x1,x2,x3,x4) = max{1, x4 - 127} false_0_A = 0 app_A(x1,x2) = max{29, x1 - 18} true_0_A = 109 app#!_A(x1,x2) = max{45, x1 - 31, x2 - 25} filter_1!_A(x1) = max{41, x1 - 2} filter_2#!_A(x1,x2) = max{44, x1 - 84, x2 - 84} cons_2!_A(x1,x2) = max{40, x1 - 7} map_1!_A(x1) = max{41, x1 + 7} map_2#!_A(x1,x2) = max{42, x1 - 32, x2 - 151} filter2_3!_A(x1,x2,x3) = max{2, x1 - 68, x2 - 84, x3 - 7} filter2_4#!_A(x1,x2,x3,x4) = max{44, x2 - 84, x3 - 8, x4 - 84} false_0!_A = 1 app!_A(x1,x2) = max{40, x1 - 103, x2 - 3} true_0!_A = 1 partial status: pi(app#) = [1] pi(filter_1) = [1] pi(filter_2#) = [] pi(cons_2) = [] pi(map_1) = [1] pi(map_2#) = [] pi(filter2_3) = [2] pi(filter2_4#) = [] pi(false_0) = [] pi(app) = [2] pi(true_0) = [] The following rules are removed: p1, p2, p3, p5, p6 -- SCC decomposition. Consider the dependency pair problem (P, R), where P consists of p1: map_2#(f,cons_2(x,xs)) -> map_2#(f,xs) p2: filter2_4#(false_0(),f,x,xs) -> filter_2#(f,xs) p3: filter_2#(f,cons_2(x,xs)) -> filter2_4#(app(f,x),f,x,xs) p4: filter2_4#(true_0(),f,x,xs) -> filter_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(filter_0(),y) -> filter_1(y) r4: app(filter_1(x1),y) -> filter_2(x1,y) r5: app(filter2_0(),y) -> filter2_1(y) r6: app(filter2_1(x1),y) -> filter2_2(x1,y) r7: app(filter2_2(x1,x2),y) -> filter2_3(x1,x2,y) r8: app(filter2_3(x1,x2,x3),y) -> filter2_4(x1,x2,x3,y) r9: app(map_0(),y) -> map_1(y) r10: app(map_1(x1),y) -> map_2(x1,y) r11: app(plus_0(),y) -> plus_1(y) r12: app(plus_1(x1),y) -> plus_2(x1,y) r13: app(s_0(),y) -> s_1(y) r14: app(times_0(),y) -> times_1(y) r15: app(times_1(x1),y) -> times_2(x1,y) r16: times_2(x,plus_2(y,s_1(z))) -> plus_2(times_2(x,plus_2(y,times_2(s_1(z),|0|_0()))),times_2(x,s_1(z))) r17: times_2(x,|0|_0()) -> |0|_0() r18: times_2(x,s_1(y)) -> plus_2(times_2(x,y),x) r19: plus_2(x,|0|_0()) -> x r20: plus_2(x,s_1(y)) -> s_1(plus_2(x,y)) r21: map_2(f,nil_0()) -> nil_0() r22: map_2(f,cons_2(x,xs)) -> cons_2(app(f,x),map_2(f,xs)) r23: filter_2(f,nil_0()) -> nil_0() r24: filter_2(f,cons_2(x,xs)) -> filter2_4(app(f,x),f,x,xs) r25: filter2_4(true_0(),f,x,xs) -> cons_2(x,filter_2(f,xs)) r26: filter2_4(false_0(),f,x,xs) -> filter_2(f,xs) The estimated dependency graph contains the following SCCs: {p1} {p2, p3, p4} -- 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(filter_0(),y) -> filter_1(y) r4: app(filter_1(x1),y) -> filter_2(x1,y) r5: app(filter2_0(),y) -> filter2_1(y) r6: app(filter2_1(x1),y) -> filter2_2(x1,y) r7: app(filter2_2(x1,x2),y) -> filter2_3(x1,x2,y) r8: app(filter2_3(x1,x2,x3),y) -> filter2_4(x1,x2,x3,y) r9: app(map_0(),y) -> map_1(y) r10: app(map_1(x1),y) -> map_2(x1,y) r11: app(plus_0(),y) -> plus_1(y) r12: app(plus_1(x1),y) -> plus_2(x1,y) r13: app(s_0(),y) -> s_1(y) r14: app(times_0(),y) -> times_1(y) r15: app(times_1(x1),y) -> times_2(x1,y) r16: times_2(x,plus_2(y,s_1(z))) -> plus_2(times_2(x,plus_2(y,times_2(s_1(z),|0|_0()))),times_2(x,s_1(z))) r17: times_2(x,|0|_0()) -> |0|_0() r18: times_2(x,s_1(y)) -> plus_2(times_2(x,y),x) r19: plus_2(x,|0|_0()) -> x r20: plus_2(x,s_1(y)) -> s_1(plus_2(x,y)) r21: map_2(f,nil_0()) -> nil_0() r22: map_2(f,cons_2(x,xs)) -> cons_2(app(f,x),map_2(f,xs)) r23: filter_2(f,nil_0()) -> nil_0() r24: filter_2(f,cons_2(x,xs)) -> filter2_4(app(f,x),f,x,xs) r25: filter2_4(true_0(),f,x,xs) -> cons_2(x,filter_2(f,xs)) r26: filter2_4(false_0(),f,x,xs) -> filter_2(f,xs) 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) = x1 cons_2_A(x1,x2) = max{4, x1 - 10, x2 - 11} base order 2: marked-algebra reduction triple (>=A, >=A!, >A!): max/plus interpretation on natural numbers: map_2#_A(x1,x2) = max{0, x2 - 13} cons_2_A(x1,x2) = max{18, x1 - 77, x2 + 12} map_2#!_A(x1,x2) = max{4, x2 - 13} cons_2!_A(x1,x2) = max{3, x1 - 108, x2 - 20} partial status: pi(map_2#) = [1] pi(cons_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: filter2_4#(false_0(),f,x,xs) -> filter_2#(f,xs) p2: filter_2#(f,cons_2(x,xs)) -> filter2_4#(app(f,x),f,x,xs) p3: filter2_4#(true_0(),f,x,xs) -> filter_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(filter_0(),y) -> filter_1(y) r4: app(filter_1(x1),y) -> filter_2(x1,y) r5: app(filter2_0(),y) -> filter2_1(y) r6: app(filter2_1(x1),y) -> filter2_2(x1,y) r7: app(filter2_2(x1,x2),y) -> filter2_3(x1,x2,y) r8: app(filter2_3(x1,x2,x3),y) -> filter2_4(x1,x2,x3,y) r9: app(map_0(),y) -> map_1(y) r10: app(map_1(x1),y) -> map_2(x1,y) r11: app(plus_0(),y) -> plus_1(y) r12: app(plus_1(x1),y) -> plus_2(x1,y) r13: app(s_0(),y) -> s_1(y) r14: app(times_0(),y) -> times_1(y) r15: app(times_1(x1),y) -> times_2(x1,y) r16: times_2(x,plus_2(y,s_1(z))) -> plus_2(times_2(x,plus_2(y,times_2(s_1(z),|0|_0()))),times_2(x,s_1(z))) r17: times_2(x,|0|_0()) -> |0|_0() r18: times_2(x,s_1(y)) -> plus_2(times_2(x,y),x) r19: plus_2(x,|0|_0()) -> x r20: plus_2(x,s_1(y)) -> s_1(plus_2(x,y)) r21: map_2(f,nil_0()) -> nil_0() r22: map_2(f,cons_2(x,xs)) -> cons_2(app(f,x),map_2(f,xs)) r23: filter_2(f,nil_0()) -> nil_0() r24: filter_2(f,cons_2(x,xs)) -> filter2_4(app(f,x),f,x,xs) r25: filter2_4(true_0(),f,x,xs) -> cons_2(x,filter_2(f,xs)) r26: filter2_4(false_0(),f,x,xs) -> filter_2(f,xs) 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: filter2_4#_A(x1,x2,x3,x4) = max{5, x4 + 3} false_0_A = 33 filter_2#_A(x1,x2) = x2 + 2 cons_2_A(x1,x2) = max{10, x2 + 4} app_A(x1,x2) = max{x1 + 13, x2 + 17} true_0_A = 37 base order 2: marked-algebra reduction triple (>=A, >=A!, >A!): max/plus interpretation on natural numbers: filter2_4#_A(x1,x2,x3,x4) = 1 false_0_A = 0 filter_2#_A(x1,x2) = 1 cons_2_A(x1,x2) = max{31, x1 + 29} app_A(x1,x2) = max{7, x1 - 28} true_0_A = 2 filter2_4#!_A(x1,x2,x3,x4) = 16 false_0!_A = 2 filter_2#!_A(x1,x2) = max{16, x2 - 16} cons_2!_A(x1,x2) = max{17, x1 + 12, x2 + 2} app!_A(x1,x2) = max{24, x1 - 9, x2 + 22} true_0!_A = 4 partial status: pi(filter2_4#) = [] pi(false_0) = [] pi(filter_2#) = [2] pi(cons_2) = [] pi(app) = [1] pi(true_0) = [] The following rules are removed: p1, p2, p3 Then no dependency pair remains. -- Reduction pair. Consider the dependency pair problem (P, R), where P consists of p1: times_2#(x,s_1(y)) -> times_2#(x,y) p2: times_2#(x,plus_2(y,s_1(z))) -> times_2#(x,s_1(z)) p3: times_2#(x,plus_2(y,s_1(z))) -> times_2#(x,plus_2(y,times_2(s_1(z),|0|_0()))) and R consists of: r1: app(cons_0(),y) -> cons_1(y) r2: app(cons_1(x1),y) -> cons_2(x1,y) r3: app(filter_0(),y) -> filter_1(y) r4: app(filter_1(x1),y) -> filter_2(x1,y) r5: app(filter2_0(),y) -> filter2_1(y) r6: app(filter2_1(x1),y) -> filter2_2(x1,y) r7: app(filter2_2(x1,x2),y) -> filter2_3(x1,x2,y) r8: app(filter2_3(x1,x2,x3),y) -> filter2_4(x1,x2,x3,y) r9: app(map_0(),y) -> map_1(y) r10: app(map_1(x1),y) -> map_2(x1,y) r11: app(plus_0(),y) -> plus_1(y) r12: app(plus_1(x1),y) -> plus_2(x1,y) r13: app(s_0(),y) -> s_1(y) r14: app(times_0(),y) -> times_1(y) r15: app(times_1(x1),y) -> times_2(x1,y) r16: times_2(x,plus_2(y,s_1(z))) -> plus_2(times_2(x,plus_2(y,times_2(s_1(z),|0|_0()))),times_2(x,s_1(z))) r17: times_2(x,|0|_0()) -> |0|_0() r18: times_2(x,s_1(y)) -> plus_2(times_2(x,y),x) r19: plus_2(x,|0|_0()) -> x r20: plus_2(x,s_1(y)) -> s_1(plus_2(x,y)) r21: map_2(f,nil_0()) -> nil_0() r22: map_2(f,cons_2(x,xs)) -> cons_2(app(f,x),map_2(f,xs)) r23: filter_2(f,nil_0()) -> nil_0() r24: filter_2(f,cons_2(x,xs)) -> filter2_4(app(f,x),f,x,xs) r25: filter2_4(true_0(),f,x,xs) -> cons_2(x,filter_2(f,xs)) r26: filter2_4(false_0(),f,x,xs) -> filter_2(f,xs) The set of usable rules consists of r17, r19, r20 Take the reduction pair: generalized weighted path order (>=MG, >G) base order 1: max/plus interpretation on natural numbers: times_2#_A(x1,x2) = max{11, x2} s_1_A(x1) = max{11, x1} plus_2_A(x1,x2) = max{x1 + 39, x2 + 12} times_2_A(x1,x2) = max{22, x1 - 12, x2 + 4} |0|_0_A = 10 base order 2: marked-algebra reduction triple (>=A, >=A!, >A!): max/plus interpretation on natural numbers: times_2#_A(x1,x2) = max{0, x1 - 18, x2 - 17} s_1_A(x1) = max{10, x1} plus_2_A(x1,x2) = max{x1 + 6, x2 + 6} times_2_A(x1,x2) = max{0, x1 - 16, x2 - 6} |0|_0_A = 0 times_2#!_A(x1,x2) = 0 s_1!_A(x1) = 0 plus_2!_A(x1,x2) = x2 + 5 times_2!_A(x1,x2) = max{3, x1 - 12, x2 - 9} |0|_0!_A = 2 partial status: pi(times_2#) = [2] pi(s_1) = [1] pi(plus_2) = [2] pi(times_2) = [2] pi(|0|_0) = [] The following rules are removed: p1, p2, p3 Then no dependency pair remains. -- Reduction pair. Consider the dependency pair problem (P, R), where P consists of p1: plus_2#(x,s_1(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(filter_0(),y) -> filter_1(y) r4: app(filter_1(x1),y) -> filter_2(x1,y) r5: app(filter2_0(),y) -> filter2_1(y) r6: app(filter2_1(x1),y) -> filter2_2(x1,y) r7: app(filter2_2(x1,x2),y) -> filter2_3(x1,x2,y) r8: app(filter2_3(x1,x2,x3),y) -> filter2_4(x1,x2,x3,y) r9: app(map_0(),y) -> map_1(y) r10: app(map_1(x1),y) -> map_2(x1,y) r11: app(plus_0(),y) -> plus_1(y) r12: app(plus_1(x1),y) -> plus_2(x1,y) r13: app(s_0(),y) -> s_1(y) r14: app(times_0(),y) -> times_1(y) r15: app(times_1(x1),y) -> times_2(x1,y) r16: times_2(x,plus_2(y,s_1(z))) -> plus_2(times_2(x,plus_2(y,times_2(s_1(z),|0|_0()))),times_2(x,s_1(z))) r17: times_2(x,|0|_0()) -> |0|_0() r18: times_2(x,s_1(y)) -> plus_2(times_2(x,y),x) r19: plus_2(x,|0|_0()) -> x r20: plus_2(x,s_1(y)) -> s_1(plus_2(x,y)) r21: map_2(f,nil_0()) -> nil_0() r22: map_2(f,cons_2(x,xs)) -> cons_2(app(f,x),map_2(f,xs)) r23: filter_2(f,nil_0()) -> nil_0() r24: filter_2(f,cons_2(x,xs)) -> filter2_4(app(f,x),f,x,xs) r25: filter2_4(true_0(),f,x,xs) -> cons_2(x,filter_2(f,xs)) r26: filter2_4(false_0(),f,x,xs) -> filter_2(f,xs) 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) = x1 + 1 s_1_A(x1) = max{0, x1 - 2} base order 2: marked-algebra reduction triple (>=A, >=A!, >A!): max/plus interpretation on natural numbers: plus_2#_A(x1,x2) = max{0, x2 - 2} s_1_A(x1) = max{7, x1 + 1} plus_2#!_A(x1,x2) = max{1, x2 - 2} s_1!_A(x1) = max{0, x1 - 1} partial status: pi(plus_2#) = [1] pi(s_1) = [] The following rules are removed: p1 Then no dependency pair remains.