YES We show the termination of the TRS R: app(app(minus(),x),|0|()) -> x app(app(minus(),app(s(),x)),app(s(),y)) -> app(app(minus(),x),y) app(app(quot(),|0|()),app(s(),y)) -> |0|() app(app(quot(),app(s(),x)),app(s(),y)) -> app(s(),app(app(quot(),app(app(minus(),x),y)),app(s(),y))) app(log(),app(s(),|0|())) -> |0|() app(log(),app(s(),app(s(),x))) -> app(s(),app(log(),app(s(),app(app(quot(),x),app(s(),app(s(),|0|())))))) 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(log_0(),y) -> log_1(y) app(map_0(),y) -> map_1(y) app(map_1(x1),y) -> map_2(x1,y) app(minus_0(),y) -> minus_1(y) app(minus_1(x1),y) -> minus_2(x1,y) app(quot_0(),y) -> quot_1(y) app(quot_1(x1),y) -> quot_2(x1,y) app(s_0(),y) -> s_1(y) minus_2(x,|0|_0()) -> x minus_2(s_1(x),s_1(y)) -> minus_2(x,y) quot_2(|0|_0(),s_1(y)) -> |0|_0() quot_2(s_1(x),s_1(y)) -> s_1(quot_2(minus_2(x,y),s_1(y))) log_1(s_1(|0|_0())) -> |0|_0() log_1(s_1(s_1(x))) -> s_1(log_1(s_1(quot_2(x,s_1(s_1(|0|_0())))))) 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#(log_0(),y) -> log_1#(y) p4: app#(map_1(x1),y) -> map_2#(x1,y) p5: app#(minus_1(x1),y) -> minus_2#(x1,y) p6: app#(quot_1(x1),y) -> quot_2#(x1,y) p7: minus_2#(s_1(x),s_1(y)) -> minus_2#(x,y) p8: quot_2#(s_1(x),s_1(y)) -> quot_2#(minus_2(x,y),s_1(y)) p9: quot_2#(s_1(x),s_1(y)) -> minus_2#(x,y) p10: log_1#(s_1(s_1(x))) -> log_1#(s_1(quot_2(x,s_1(s_1(|0|_0()))))) p11: log_1#(s_1(s_1(x))) -> quot_2#(x,s_1(s_1(|0|_0()))) p12: map_2#(f,cons_2(x,xs)) -> app#(f,x) p13: map_2#(f,cons_2(x,xs)) -> map_2#(f,xs) p14: filter_2#(f,cons_2(x,xs)) -> filter2_4#(app(f,x),f,x,xs) p15: filter_2#(f,cons_2(x,xs)) -> app#(f,x) p16: filter2_4#(true_0(),f,x,xs) -> filter_2#(f,xs) p17: 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(log_0(),y) -> log_1(y) r10: app(map_0(),y) -> map_1(y) r11: app(map_1(x1),y) -> map_2(x1,y) r12: app(minus_0(),y) -> minus_1(y) r13: app(minus_1(x1),y) -> minus_2(x1,y) r14: app(quot_0(),y) -> quot_1(y) r15: app(quot_1(x1),y) -> quot_2(x1,y) r16: app(s_0(),y) -> s_1(y) r17: minus_2(x,|0|_0()) -> x r18: minus_2(s_1(x),s_1(y)) -> minus_2(x,y) r19: quot_2(|0|_0(),s_1(y)) -> |0|_0() r20: quot_2(s_1(x),s_1(y)) -> s_1(quot_2(minus_2(x,y),s_1(y))) r21: log_1(s_1(|0|_0())) -> |0|_0() r22: log_1(s_1(s_1(x))) -> s_1(log_1(s_1(quot_2(x,s_1(s_1(|0|_0())))))) r23: map_2(f,nil_0()) -> nil_0() r24: map_2(f,cons_2(x,xs)) -> cons_2(app(f,x),map_2(f,xs)) r25: filter_2(f,nil_0()) -> nil_0() r26: filter_2(f,cons_2(x,xs)) -> filter2_4(app(f,x),f,x,xs) r27: filter2_4(true_0(),f,x,xs) -> cons_2(x,filter_2(f,xs)) r28: filter2_4(false_0(),f,x,xs) -> filter_2(f,xs) The estimated dependency graph contains the following SCCs: {p1, p2, p4, p12, p13, p14, p15, p16, p17} {p10} {p8} {p7} -- 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(log_0(),y) -> log_1(y) r10: app(map_0(),y) -> map_1(y) r11: app(map_1(x1),y) -> map_2(x1,y) r12: app(minus_0(),y) -> minus_1(y) r13: app(minus_1(x1),y) -> minus_2(x1,y) r14: app(quot_0(),y) -> quot_1(y) r15: app(quot_1(x1),y) -> quot_2(x1,y) r16: app(s_0(),y) -> s_1(y) r17: minus_2(x,|0|_0()) -> x r18: minus_2(s_1(x),s_1(y)) -> minus_2(x,y) r19: quot_2(|0|_0(),s_1(y)) -> |0|_0() r20: quot_2(s_1(x),s_1(y)) -> s_1(quot_2(minus_2(x,y),s_1(y))) r21: log_1(s_1(|0|_0())) -> |0|_0() r22: log_1(s_1(s_1(x))) -> s_1(log_1(s_1(quot_2(x,s_1(s_1(|0|_0())))))) r23: map_2(f,nil_0()) -> nil_0() r24: map_2(f,cons_2(x,xs)) -> cons_2(app(f,x),map_2(f,xs)) r25: filter_2(f,nil_0()) -> nil_0() r26: filter_2(f,cons_2(x,xs)) -> filter2_4(app(f,x),f,x,xs) r27: filter2_4(true_0(),f,x,xs) -> cons_2(x,filter_2(f,xs)) r28: filter2_4(false_0(),f,x,xs) -> filter_2(f,xs) The set of usable rules consists of r19, r25 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) = max{64, x1 + 6} filter_2#_A(x1,x2) = max{5, x1 + 2} cons_2_A(x1,x2) = 0 map_1_A(x1) = max{38, x1 + 23} map_2#_A(x1,x2) = max{25, x1 + 2} filter2_3_A(x1,x2,x3) = max{63, x1 - 25, x2 + 3, x3 - 24} filter2_4#_A(x1,x2,x3,x4) = max{5, x2 + 2} false_0_A = 31 app_A(x1,x2) = max{63, x1 + 23, x2 + 23} true_0_A = 29 quot_2_A(x1,x2) = max{64, x1 + 44} |0|_0_A = 21 s_1_A(x1) = max{21, x1 - 22} filter_2_A(x1,x2) = 30 nil_0_A = 1 base order 2: marked-algebra reduction triple (>=A, >=A!, >A!): matrix interpretation with standard point-wise order: carrier: N^1 order: standard order interpretations: app#_A(x1,x2) = x1 + x2 filter_1_A(x1) = x1 + 3 filter_2#_A(x1,x2) = x1 + x2 + 3 cons_2_A(x1,x2) = x1 + x2 + 14 map_1_A(x1) = x1 + 13 map_2#_A(x1,x2) = x1 + x2 filter2_3_A(x1,x2,x3) = x1 + x2 + x3 + 11 filter2_4#_A(x1,x2,x3,x4) = x2 + x4 + 3 false_0_A() = 1 app_A(x1,x2) = x1 + x2 + 1 true_0_A() = 1 quot_2_A(x1,x2) = x1 + 7 |0|_0_A() = 7 s_1_A(x1) = 6 filter_2_A(x1,x2) = x1 + x2 + 14 nil_0_A() = 16 app#!_A(x1,x2) = x1 + x2 + 8 filter_1!_A(x1) = 7 filter_2#!_A(x1,x2) = x2 + 11 cons_2!_A(x1,x2) = 13 map_1!_A(x1) = 15 map_2#!_A(x1,x2) = 14 filter2_3!_A(x1,x2,x3) = x1 + x2 + 14 filter2_4#!_A(x1,x2,x3,x4) = x4 + 12 false_0!_A() = 10 app!_A(x1,x2) = x1 + x2 + 5 true_0!_A() = 0 quot_2!_A(x1,x2) = x1 |0|_0!_A() = 6 s_1!_A(x1) = 8 filter_2!_A(x1,x2) = x2 + 9 nil_0!_A() = 0 partial status: pi(app#) = [1] pi(filter_1) = [] pi(filter_2#) = [1] pi(cons_2) = [] pi(map_1) = [] pi(map_2#) = [1] pi(filter2_3) = [] pi(filter2_4#) = [] pi(false_0) = [] pi(app) = [2] pi(true_0) = [] pi(quot_2) = [1] pi(|0|_0) = [] pi(s_1) = [] pi(filter_2) = [] pi(nil_0) = [] The following rules are removed: p1, p2, p3, p5, p6, p7, p8, p9 -- 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) 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(log_0(),y) -> log_1(y) r10: app(map_0(),y) -> map_1(y) r11: app(map_1(x1),y) -> map_2(x1,y) r12: app(minus_0(),y) -> minus_1(y) r13: app(minus_1(x1),y) -> minus_2(x1,y) r14: app(quot_0(),y) -> quot_1(y) r15: app(quot_1(x1),y) -> quot_2(x1,y) r16: app(s_0(),y) -> s_1(y) r17: minus_2(x,|0|_0()) -> x r18: minus_2(s_1(x),s_1(y)) -> minus_2(x,y) r19: quot_2(|0|_0(),s_1(y)) -> |0|_0() r20: quot_2(s_1(x),s_1(y)) -> s_1(quot_2(minus_2(x,y),s_1(y))) r21: log_1(s_1(|0|_0())) -> |0|_0() r22: log_1(s_1(s_1(x))) -> s_1(log_1(s_1(quot_2(x,s_1(s_1(|0|_0())))))) r23: map_2(f,nil_0()) -> nil_0() r24: map_2(f,cons_2(x,xs)) -> cons_2(app(f,x),map_2(f,xs)) r25: filter_2(f,nil_0()) -> nil_0() r26: filter_2(f,cons_2(x,xs)) -> filter2_4(app(f,x),f,x,xs) r27: filter2_4(true_0(),f,x,xs) -> cons_2(x,filter_2(f,xs)) r28: filter2_4(false_0(),f,x,xs) -> filter_2(f,xs) The estimated dependency graph contains the following SCCs: {p1} -- 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(log_0(),y) -> log_1(y) r10: app(map_0(),y) -> map_1(y) r11: app(map_1(x1),y) -> map_2(x1,y) r12: app(minus_0(),y) -> minus_1(y) r13: app(minus_1(x1),y) -> minus_2(x1,y) r14: app(quot_0(),y) -> quot_1(y) r15: app(quot_1(x1),y) -> quot_2(x1,y) r16: app(s_0(),y) -> s_1(y) r17: minus_2(x,|0|_0()) -> x r18: minus_2(s_1(x),s_1(y)) -> minus_2(x,y) r19: quot_2(|0|_0(),s_1(y)) -> |0|_0() r20: quot_2(s_1(x),s_1(y)) -> s_1(quot_2(minus_2(x,y),s_1(y))) r21: log_1(s_1(|0|_0())) -> |0|_0() r22: log_1(s_1(s_1(x))) -> s_1(log_1(s_1(quot_2(x,s_1(s_1(|0|_0())))))) r23: map_2(f,nil_0()) -> nil_0() r24: map_2(f,cons_2(x,xs)) -> cons_2(app(f,x),map_2(f,xs)) r25: filter_2(f,nil_0()) -> nil_0() r26: filter_2(f,cons_2(x,xs)) -> filter2_4(app(f,x),f,x,xs) r27: filter2_4(true_0(),f,x,xs) -> cons_2(x,filter_2(f,xs)) r28: 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) = max{7, x1 + 1} cons_2_A(x1,x2) = max{6, x1 + 4, x2 + 4} base order 2: marked-algebra reduction triple (>=A, >=A!, >A!): matrix interpretation with standard point-wise order: carrier: N^1 order: standard order interpretations: map_2#_A(x1,x2) = x2 cons_2_A(x1,x2) = x1 + x2 + 5 map_2#!_A(x1,x2) = x2 cons_2!_A(x1,x2) = x1 + x2 + 7 partial status: pi(map_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: log_1#(s_1(s_1(x))) -> log_1#(s_1(quot_2(x,s_1(s_1(|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(log_0(),y) -> log_1(y) r10: app(map_0(),y) -> map_1(y) r11: app(map_1(x1),y) -> map_2(x1,y) r12: app(minus_0(),y) -> minus_1(y) r13: app(minus_1(x1),y) -> minus_2(x1,y) r14: app(quot_0(),y) -> quot_1(y) r15: app(quot_1(x1),y) -> quot_2(x1,y) r16: app(s_0(),y) -> s_1(y) r17: minus_2(x,|0|_0()) -> x r18: minus_2(s_1(x),s_1(y)) -> minus_2(x,y) r19: quot_2(|0|_0(),s_1(y)) -> |0|_0() r20: quot_2(s_1(x),s_1(y)) -> s_1(quot_2(minus_2(x,y),s_1(y))) r21: log_1(s_1(|0|_0())) -> |0|_0() r22: log_1(s_1(s_1(x))) -> s_1(log_1(s_1(quot_2(x,s_1(s_1(|0|_0())))))) r23: map_2(f,nil_0()) -> nil_0() r24: map_2(f,cons_2(x,xs)) -> cons_2(app(f,x),map_2(f,xs)) r25: filter_2(f,nil_0()) -> nil_0() r26: filter_2(f,cons_2(x,xs)) -> filter2_4(app(f,x),f,x,xs) r27: filter2_4(true_0(),f,x,xs) -> cons_2(x,filter_2(f,xs)) r28: filter2_4(false_0(),f,x,xs) -> filter_2(f,xs) The set of usable rules consists of r13, r17, r18, r19, r20, r21 Take the reduction pair: generalized weighted path order (>=MG, >G) base order 1: max/plus interpretation on natural numbers: log_1#_A(x1) = max{22, x1 + 8} s_1_A(x1) = max{15, x1 + 8} quot_2_A(x1,x2) = max{5, x1} |0|_0_A = 12 app_A(x1,x2) = max{x1, x2 + 4} minus_1_A(x1) = x1 + 7 minus_2_A(x1,x2) = max{7, x1} log_1_A(x1) = max{17, x1 - 20} base order 2: marked-algebra reduction triple (>=A, >=A!, >A!): matrix interpretation with standard point-wise order: carrier: N^1 order: standard order interpretations: log_1#_A(x1) = 0 s_1_A(x1) = x1 + 4 quot_2_A(x1,x2) = x1 |0|_0_A() = 1 app_A(x1,x2) = x1 + x2 + 1 minus_1_A(x1) = x1 + 3 minus_2_A(x1,x2) = x1 log_1_A(x1) = 3 log_1#!_A(x1) = x1 + 16 s_1!_A(x1) = x1 + 18 quot_2!_A(x1,x2) = x2 + 14 |0|_0!_A() = 25 app!_A(x1,x2) = 13 minus_1!_A(x1) = 15 minus_2!_A(x1,x2) = 14 log_1!_A(x1) = 12 partial status: pi(log_1#) = [1] pi(s_1) = [] pi(quot_2) = [1] pi(|0|_0) = [] pi(app) = [1] pi(minus_1) = [] pi(minus_2) = [1] pi(log_1) = [] 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: quot_2#(s_1(x),s_1(y)) -> quot_2#(minus_2(x,y),s_1(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(log_0(),y) -> log_1(y) r10: app(map_0(),y) -> map_1(y) r11: app(map_1(x1),y) -> map_2(x1,y) r12: app(minus_0(),y) -> minus_1(y) r13: app(minus_1(x1),y) -> minus_2(x1,y) r14: app(quot_0(),y) -> quot_1(y) r15: app(quot_1(x1),y) -> quot_2(x1,y) r16: app(s_0(),y) -> s_1(y) r17: minus_2(x,|0|_0()) -> x r18: minus_2(s_1(x),s_1(y)) -> minus_2(x,y) r19: quot_2(|0|_0(),s_1(y)) -> |0|_0() r20: quot_2(s_1(x),s_1(y)) -> s_1(quot_2(minus_2(x,y),s_1(y))) r21: log_1(s_1(|0|_0())) -> |0|_0() r22: log_1(s_1(s_1(x))) -> s_1(log_1(s_1(quot_2(x,s_1(s_1(|0|_0())))))) r23: map_2(f,nil_0()) -> nil_0() r24: map_2(f,cons_2(x,xs)) -> cons_2(app(f,x),map_2(f,xs)) r25: filter_2(f,nil_0()) -> nil_0() r26: filter_2(f,cons_2(x,xs)) -> filter2_4(app(f,x),f,x,xs) r27: filter2_4(true_0(),f,x,xs) -> cons_2(x,filter_2(f,xs)) r28: filter2_4(false_0(),f,x,xs) -> filter_2(f,xs) The set of usable rules consists of r17, r18, r25 Take the reduction pair: generalized weighted path order (>=MG, >G) base order 1: max/plus interpretation on natural numbers: quot_2#_A(x1,x2) = max{1, x1 - 29} s_1_A(x1) = x1 + 33 minus_2_A(x1,x2) = max{20, x1 + 5} |0|_0_A = 40 filter_2_A(x1,x2) = x1 + 22 nil_0_A = 21 base order 2: marked-algebra reduction triple (>=A, >=A!, >A!): matrix interpretation with standard point-wise order: carrier: N^1 order: standard order interpretations: quot_2#_A(x1,x2) = x1 s_1_A(x1) = x1 + 6 minus_2_A(x1,x2) = x1 + 5 |0|_0_A() = 8 filter_2_A(x1,x2) = x2 + 10 nil_0_A() = 25 quot_2#!_A(x1,x2) = 16 s_1!_A(x1) = 17 minus_2!_A(x1,x2) = x2 + 18 |0|_0!_A() = 18 filter_2!_A(x1,x2) = 14 nil_0!_A() = 0 partial status: pi(quot_2#) = [] pi(s_1) = [] pi(minus_2) = [] pi(|0|_0) = [] 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: minus_2#(s_1(x),s_1(y)) -> minus_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(log_0(),y) -> log_1(y) r10: app(map_0(),y) -> map_1(y) r11: app(map_1(x1),y) -> map_2(x1,y) r12: app(minus_0(),y) -> minus_1(y) r13: app(minus_1(x1),y) -> minus_2(x1,y) r14: app(quot_0(),y) -> quot_1(y) r15: app(quot_1(x1),y) -> quot_2(x1,y) r16: app(s_0(),y) -> s_1(y) r17: minus_2(x,|0|_0()) -> x r18: minus_2(s_1(x),s_1(y)) -> minus_2(x,y) r19: quot_2(|0|_0(),s_1(y)) -> |0|_0() r20: quot_2(s_1(x),s_1(y)) -> s_1(quot_2(minus_2(x,y),s_1(y))) r21: log_1(s_1(|0|_0())) -> |0|_0() r22: log_1(s_1(s_1(x))) -> s_1(log_1(s_1(quot_2(x,s_1(s_1(|0|_0())))))) r23: map_2(f,nil_0()) -> nil_0() r24: map_2(f,cons_2(x,xs)) -> cons_2(app(f,x),map_2(f,xs)) r25: filter_2(f,nil_0()) -> nil_0() r26: filter_2(f,cons_2(x,xs)) -> filter2_4(app(f,x),f,x,xs) r27: filter2_4(true_0(),f,x,xs) -> cons_2(x,filter_2(f,xs)) r28: filter2_4(false_0(),f,x,xs) -> filter_2(f,xs) The set of usable rules consists of r25 Take the reduction pair: generalized weighted path order (>=MG, >G) base order 1: max/plus interpretation on natural numbers: minus_2#_A(x1,x2) = max{1, x1 - 22} s_1_A(x1) = x1 + 28 filter_2_A(x1,x2) = max{x1 + 4, x2 + 11} nil_0_A = 8 base order 2: marked-algebra reduction triple (>=A, >=A!, >A!): matrix interpretation with standard point-wise order: carrier: N^1 order: standard order interpretations: minus_2#_A(x1,x2) = x1 + x2 s_1_A(x1) = x1 + 10 filter_2_A(x1,x2) = x2 + 10 nil_0_A() = 6 minus_2#!_A(x1,x2) = x1 + x2 + 14 s_1!_A(x1) = 13 filter_2!_A(x1,x2) = x2 + 5 nil_0!_A() = 0 partial status: pi(minus_2#) = [] pi(s_1) = [1] pi(filter_2) = [1, 2] pi(nil_0) = [] The following rules are removed: p1 Then no dependency pair remains.