YES We show the termination of the TRS R: |0|(|#|()) -> |#|() +(x,|#|()) -> x +(|#|(),x) -> x +(|0|(x),|0|(y)) -> |0|(+(x,y)) +(|0|(x),|1|(y)) -> |1|(+(x,y)) +(|1|(x),|0|(y)) -> |1|(+(x,y)) +(|1|(x),|1|(y)) -> |0|(+(+(x,y),|1|(|#|()))) +(+(x,y),z) -> +(x,+(y,z)) *(|#|(),x) -> |#|() *(|0|(x),y) -> |0|(*(x,y)) *(|1|(x),y) -> +(|0|(*(x,y)),y) *(*(x,y),z) -> *(x,*(y,z)) sum(nil()) -> |0|(|#|()) sum(cons(x,l)) -> +(x,sum(l)) prod(nil()) -> |1|(|#|()) prod(cons(x,l)) -> *(x,prod(l)) -- SCC decomposition. Consider the dependency pair problem (P, R), where P consists of p1: +#(|0|(x),|0|(y)) -> |0|#(+(x,y)) p2: +#(|0|(x),|0|(y)) -> +#(x,y) p3: +#(|0|(x),|1|(y)) -> +#(x,y) p4: +#(|1|(x),|0|(y)) -> +#(x,y) p5: +#(|1|(x),|1|(y)) -> |0|#(+(+(x,y),|1|(|#|()))) p6: +#(|1|(x),|1|(y)) -> +#(+(x,y),|1|(|#|())) p7: +#(|1|(x),|1|(y)) -> +#(x,y) p8: +#(+(x,y),z) -> +#(x,+(y,z)) p9: +#(+(x,y),z) -> +#(y,z) p10: *#(|0|(x),y) -> |0|#(*(x,y)) p11: *#(|0|(x),y) -> *#(x,y) p12: *#(|1|(x),y) -> +#(|0|(*(x,y)),y) p13: *#(|1|(x),y) -> |0|#(*(x,y)) p14: *#(|1|(x),y) -> *#(x,y) p15: *#(*(x,y),z) -> *#(x,*(y,z)) p16: *#(*(x,y),z) -> *#(y,z) p17: sum#(nil()) -> |0|#(|#|()) p18: sum#(cons(x,l)) -> +#(x,sum(l)) p19: sum#(cons(x,l)) -> sum#(l) p20: prod#(cons(x,l)) -> *#(x,prod(l)) p21: prod#(cons(x,l)) -> prod#(l) and R consists of: r1: |0|(|#|()) -> |#|() r2: +(x,|#|()) -> x r3: +(|#|(),x) -> x r4: +(|0|(x),|0|(y)) -> |0|(+(x,y)) r5: +(|0|(x),|1|(y)) -> |1|(+(x,y)) r6: +(|1|(x),|0|(y)) -> |1|(+(x,y)) r7: +(|1|(x),|1|(y)) -> |0|(+(+(x,y),|1|(|#|()))) r8: +(+(x,y),z) -> +(x,+(y,z)) r9: *(|#|(),x) -> |#|() r10: *(|0|(x),y) -> |0|(*(x,y)) r11: *(|1|(x),y) -> +(|0|(*(x,y)),y) r12: *(*(x,y),z) -> *(x,*(y,z)) r13: sum(nil()) -> |0|(|#|()) r14: sum(cons(x,l)) -> +(x,sum(l)) r15: prod(nil()) -> |1|(|#|()) r16: prod(cons(x,l)) -> *(x,prod(l)) The estimated dependency graph contains the following SCCs: {p19} {p21} {p11, p14, p15, p16} {p2, p3, p4, p6, p7, p8, p9} -- Reduction pair. Consider the dependency pair problem (P, R), where P consists of p1: sum#(cons(x,l)) -> sum#(l) and R consists of: r1: |0|(|#|()) -> |#|() r2: +(x,|#|()) -> x r3: +(|#|(),x) -> x r4: +(|0|(x),|0|(y)) -> |0|(+(x,y)) r5: +(|0|(x),|1|(y)) -> |1|(+(x,y)) r6: +(|1|(x),|0|(y)) -> |1|(+(x,y)) r7: +(|1|(x),|1|(y)) -> |0|(+(+(x,y),|1|(|#|()))) r8: +(+(x,y),z) -> +(x,+(y,z)) r9: *(|#|(),x) -> |#|() r10: *(|0|(x),y) -> |0|(*(x,y)) r11: *(|1|(x),y) -> +(|0|(*(x,y)),y) r12: *(*(x,y),z) -> *(x,*(y,z)) r13: sum(nil()) -> |0|(|#|()) r14: sum(cons(x,l)) -> +(x,sum(l)) r15: prod(nil()) -> |1|(|#|()) r16: prod(cons(x,l)) -> *(x,prod(l)) The set of usable rules consists of (no rules) Take the reduction pair: generalized weighted path order (>=MG, >G) base order 1: matrix interpretation with standard point-wise order: carrier: N^1 order: standard order interpretations: sum#_A(x1) = x1 cons_A(x1,x2) = x2 + 9 base order 2: marked-algebra reduction triple (>=A, >=A!, >A!): max/plus interpretation on natural numbers: sum#_A(x1) = x1 cons_A(x1,x2) = max{x1 + 92, x2 + 91} sum#!_A(x1) = max{2, x1 - 93} cons!_A(x1,x2) = max{1, x1 - 45} partial status: pi(sum#) = [] 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: prod#(cons(x,l)) -> prod#(l) and R consists of: r1: |0|(|#|()) -> |#|() r2: +(x,|#|()) -> x r3: +(|#|(),x) -> x r4: +(|0|(x),|0|(y)) -> |0|(+(x,y)) r5: +(|0|(x),|1|(y)) -> |1|(+(x,y)) r6: +(|1|(x),|0|(y)) -> |1|(+(x,y)) r7: +(|1|(x),|1|(y)) -> |0|(+(+(x,y),|1|(|#|()))) r8: +(+(x,y),z) -> +(x,+(y,z)) r9: *(|#|(),x) -> |#|() r10: *(|0|(x),y) -> |0|(*(x,y)) r11: *(|1|(x),y) -> +(|0|(*(x,y)),y) r12: *(*(x,y),z) -> *(x,*(y,z)) r13: sum(nil()) -> |0|(|#|()) r14: sum(cons(x,l)) -> +(x,sum(l)) r15: prod(nil()) -> |1|(|#|()) r16: prod(cons(x,l)) -> *(x,prod(l)) The set of usable rules consists of (no rules) Take the reduction pair: generalized weighted path order (>=MG, >G) base order 1: matrix interpretation with standard point-wise order: carrier: N^1 order: standard order interpretations: prod#_A(x1) = x1 cons_A(x1,x2) = x2 + 7 base order 2: marked-algebra reduction triple (>=A, >=A!, >A!): max/plus interpretation on natural numbers: prod#_A(x1) = x1 cons_A(x1,x2) = max{122, x1 + 107, x2 + 1} prod#!_A(x1) = max{5, x1 - 123} cons!_A(x1,x2) = max{x1 + 4, x2 + 6} partial status: pi(prod#) = [] 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: *#(*(x,y),z) -> *#(y,z) p2: *#(*(x,y),z) -> *#(x,*(y,z)) p3: *#(|1|(x),y) -> *#(x,y) p4: *#(|0|(x),y) -> *#(x,y) and R consists of: r1: |0|(|#|()) -> |#|() r2: +(x,|#|()) -> x r3: +(|#|(),x) -> x r4: +(|0|(x),|0|(y)) -> |0|(+(x,y)) r5: +(|0|(x),|1|(y)) -> |1|(+(x,y)) r6: +(|1|(x),|0|(y)) -> |1|(+(x,y)) r7: +(|1|(x),|1|(y)) -> |0|(+(+(x,y),|1|(|#|()))) r8: +(+(x,y),z) -> +(x,+(y,z)) r9: *(|#|(),x) -> |#|() r10: *(|0|(x),y) -> |0|(*(x,y)) r11: *(|1|(x),y) -> +(|0|(*(x,y)),y) r12: *(*(x,y),z) -> *(x,*(y,z)) r13: sum(nil()) -> |0|(|#|()) r14: sum(cons(x,l)) -> +(x,sum(l)) r15: prod(nil()) -> |1|(|#|()) r16: prod(cons(x,l)) -> *(x,prod(l)) The set of usable rules consists of r2, r3 Take the reduction pair: generalized weighted path order (>=MG, >G) base order 1: matrix interpretation with standard point-wise order: carrier: N^1 order: standard order interpretations: *#_A(x1,x2) = x1 + 1 *_A(x1,x2) = x1 + x2 + 7 |1|_A(x1) = x1 + 6 |0|_A(x1) = x1 + 2 +_A(x1,x2) = x1 + x2 + 3 |#|_A() = 0 base order 2: marked-algebra reduction triple (>=A, >=A!, >A!): max/plus interpretation on natural numbers: *#_A(x1,x2) = 0 *_A(x1,x2) = max{4, x2 - 56} |1|_A(x1) = max{9, x1 - 56} |0|_A(x1) = max{34, x1 - 56} +_A(x1,x2) = max{33, x1 + 22, x2 + 16} |#|_A = 16 *#!_A(x1,x2) = max{1, x1 - 56} *!_A(x1,x2) = max{14, x1 - 56, x2 + 11} |1|!_A(x1) = max{2, x1 - 17} |0|!_A(x1) = max{10, x1 - 52} +!_A(x1,x2) = max{15, x1, x2 - 35} |#|!_A = 1 partial status: pi(*#) = [] pi(*) = [2] pi(|1|) = [] pi(|0|) = [] pi(+) = [1, 2] pi(|#|) = [] The following rules are removed: p1, p2, p3, p4 Then no dependency pair remains. -- Reduction pair. Consider the dependency pair problem (P, R), where P consists of p1: +#(|0|(x),|0|(y)) -> +#(x,y) p2: +#(+(x,y),z) -> +#(y,z) p3: +#(+(x,y),z) -> +#(x,+(y,z)) p4: +#(|1|(x),|1|(y)) -> +#(x,y) p5: +#(|1|(x),|1|(y)) -> +#(+(x,y),|1|(|#|())) p6: +#(|0|(x),|1|(y)) -> +#(x,y) p7: +#(|1|(x),|0|(y)) -> +#(x,y) and R consists of: r1: |0|(|#|()) -> |#|() r2: +(x,|#|()) -> x r3: +(|#|(),x) -> x r4: +(|0|(x),|0|(y)) -> |0|(+(x,y)) r5: +(|0|(x),|1|(y)) -> |1|(+(x,y)) r6: +(|1|(x),|0|(y)) -> |1|(+(x,y)) r7: +(|1|(x),|1|(y)) -> |0|(+(+(x,y),|1|(|#|()))) r8: +(+(x,y),z) -> +(x,+(y,z)) r9: *(|#|(),x) -> |#|() r10: *(|0|(x),y) -> |0|(*(x,y)) r11: *(|1|(x),y) -> +(|0|(*(x,y)),y) r12: *(*(x,y),z) -> *(x,*(y,z)) r13: sum(nil()) -> |0|(|#|()) r14: sum(cons(x,l)) -> +(x,sum(l)) r15: prod(nil()) -> |1|(|#|()) r16: prod(cons(x,l)) -> *(x,prod(l)) The set of usable rules consists of r1, r2, r3, r4, r5, r6, r7, r8 Take the reduction pair: generalized weighted path order (>=MG, >G) base order 1: matrix interpretation with standard point-wise order: carrier: N^1 order: standard order interpretations: +#_A(x1,x2) = x1 + x2 + 3 |0|_A(x1) = x1 + 2 +_A(x1,x2) = x1 + x2 + 1 |1|_A(x1) = x1 + 7 |#|_A() = 1 base order 2: marked-algebra reduction triple (>=A, >=A!, >A!): max/plus interpretation on natural numbers: +#_A(x1,x2) = 0 |0|_A(x1) = 5 +_A(x1,x2) = max{2, x1, x2} |1|_A(x1) = 26 |#|_A = 5 +#!_A(x1,x2) = 7 |0|!_A(x1) = max{82, x1 - 6} +!_A(x1,x2) = max{60, x1 + 55} |1|!_A(x1) = max{6, x1 + 3} |#|!_A = 2 partial status: pi(+#) = [] pi(|0|) = [] pi(+) = [] pi(|1|) = [] pi(|#|) = [] The following rules are removed: p1, p2, p4, p5, p6, p7 -- SCC decomposition. Consider the dependency pair problem (P, R), where P consists of p1: +#(+(x,y),z) -> +#(x,+(y,z)) and R consists of: r1: |0|(|#|()) -> |#|() r2: +(x,|#|()) -> x r3: +(|#|(),x) -> x r4: +(|0|(x),|0|(y)) -> |0|(+(x,y)) r5: +(|0|(x),|1|(y)) -> |1|(+(x,y)) r6: +(|1|(x),|0|(y)) -> |1|(+(x,y)) r7: +(|1|(x),|1|(y)) -> |0|(+(+(x,y),|1|(|#|()))) r8: +(+(x,y),z) -> +(x,+(y,z)) r9: *(|#|(),x) -> |#|() r10: *(|0|(x),y) -> |0|(*(x,y)) r11: *(|1|(x),y) -> +(|0|(*(x,y)),y) r12: *(*(x,y),z) -> *(x,*(y,z)) r13: sum(nil()) -> |0|(|#|()) r14: sum(cons(x,l)) -> +(x,sum(l)) r15: prod(nil()) -> |1|(|#|()) r16: prod(cons(x,l)) -> *(x,prod(l)) The estimated dependency graph contains the following SCCs: {p1} -- Reduction pair. Consider the dependency pair problem (P, R), where P consists of p1: +#(+(x,y),z) -> +#(x,+(y,z)) and R consists of: r1: |0|(|#|()) -> |#|() r2: +(x,|#|()) -> x r3: +(|#|(),x) -> x r4: +(|0|(x),|0|(y)) -> |0|(+(x,y)) r5: +(|0|(x),|1|(y)) -> |1|(+(x,y)) r6: +(|1|(x),|0|(y)) -> |1|(+(x,y)) r7: +(|1|(x),|1|(y)) -> |0|(+(+(x,y),|1|(|#|()))) r8: +(+(x,y),z) -> +(x,+(y,z)) r9: *(|#|(),x) -> |#|() r10: *(|0|(x),y) -> |0|(*(x,y)) r11: *(|1|(x),y) -> +(|0|(*(x,y)),y) r12: *(*(x,y),z) -> *(x,*(y,z)) r13: sum(nil()) -> |0|(|#|()) r14: sum(cons(x,l)) -> +(x,sum(l)) r15: prod(nil()) -> |1|(|#|()) r16: prod(cons(x,l)) -> *(x,prod(l)) The set of usable rules consists of r1, r2, r3, r4, r5, r6, r7, r8, r9 Take the reduction pair: generalized weighted path order (>=MG, >G) base order 1: matrix interpretation with standard point-wise order: carrier: N^1 order: standard order interpretations: +#_A(x1,x2) = x1 + x2 + 1 +_A(x1,x2) = x1 + x2 + 2 |0|_A(x1) = x1 + 1 |#|_A() = 1 |1|_A(x1) = x1 + 5 *_A(x1,x2) = 6 base order 2: marked-algebra reduction triple (>=A, >=A!, >A!): max/plus interpretation on natural numbers: +#_A(x1,x2) = max{0, x1 - 64, x2 - 95} +_A(x1,x2) = max{63, x1 + 31, x2} |0|_A(x1) = 33 |#|_A = 5 |1|_A(x1) = 77 *_A(x1,x2) = max{63, x1 - 78, x2 - 78} +#!_A(x1,x2) = max{79, x1 - 64, x2 - 95} +!_A(x1,x2) = max{79, x1 - 34, x2 - 67} |0|!_A(x1) = max{60, x1 - 83} |#|!_A = 1 |1|!_A(x1) = max{1, x1 - 2} *!_A(x1,x2) = max{6, x2 - 68} partial status: pi(+#) = [1] pi(+) = [1] pi(|0|) = [1] pi(|#|) = [] pi(|1|) = [1] pi(*) = [] The following rules are removed: p1 Then no dependency pair remains.