YES We show the termination of the TRS R: U11(tt(),V1,V2) -> U12(isNatKind(activate(V1)),activate(V1),activate(V2)) U12(tt(),V1,V2) -> U13(isNatKind(activate(V2)),activate(V1),activate(V2)) U13(tt(),V1,V2) -> U14(isNatKind(activate(V2)),activate(V1),activate(V2)) U14(tt(),V1,V2) -> U15(isNat(activate(V1)),activate(V2)) U15(tt(),V2) -> U16(isNat(activate(V2))) U16(tt()) -> tt() U21(tt(),V1) -> U22(isNatKind(activate(V1)),activate(V1)) U22(tt(),V1) -> U23(isNat(activate(V1))) U23(tt()) -> tt() U31(tt(),V2) -> U32(isNatKind(activate(V2))) U32(tt()) -> tt() U41(tt()) -> tt() U51(tt(),N) -> U52(isNatKind(activate(N)),activate(N)) U52(tt(),N) -> activate(N) U61(tt(),M,N) -> U62(isNatKind(activate(M)),activate(M),activate(N)) U62(tt(),M,N) -> U63(isNat(activate(N)),activate(M),activate(N)) U63(tt(),M,N) -> U64(isNatKind(activate(N)),activate(M),activate(N)) U64(tt(),M,N) -> s(plus(activate(N),activate(M))) isNat(n__0()) -> tt() isNat(n__plus(V1,V2)) -> U11(isNatKind(activate(V1)),activate(V1),activate(V2)) isNat(n__s(V1)) -> U21(isNatKind(activate(V1)),activate(V1)) isNatKind(n__0()) -> tt() isNatKind(n__plus(V1,V2)) -> U31(isNatKind(activate(V1)),activate(V2)) isNatKind(n__s(V1)) -> U41(isNatKind(activate(V1))) plus(N,|0|()) -> U51(isNat(N),N) plus(N,s(M)) -> U61(isNat(M),M,N) |0|() -> n__0() plus(X1,X2) -> n__plus(X1,X2) s(X) -> n__s(X) activate(n__0()) -> |0|() activate(n__plus(X1,X2)) -> plus(X1,X2) activate(n__s(X)) -> s(X) activate(X) -> X -- SCC decomposition. Consider the dependency pair problem (P, R), where P consists of p1: U11#(tt(),V1,V2) -> U12#(isNatKind(activate(V1)),activate(V1),activate(V2)) p2: U11#(tt(),V1,V2) -> isNatKind#(activate(V1)) p3: U11#(tt(),V1,V2) -> activate#(V1) p4: U11#(tt(),V1,V2) -> activate#(V2) p5: U12#(tt(),V1,V2) -> U13#(isNatKind(activate(V2)),activate(V1),activate(V2)) p6: U12#(tt(),V1,V2) -> isNatKind#(activate(V2)) p7: U12#(tt(),V1,V2) -> activate#(V2) p8: U12#(tt(),V1,V2) -> activate#(V1) p9: U13#(tt(),V1,V2) -> U14#(isNatKind(activate(V2)),activate(V1),activate(V2)) p10: U13#(tt(),V1,V2) -> isNatKind#(activate(V2)) p11: U13#(tt(),V1,V2) -> activate#(V2) p12: U13#(tt(),V1,V2) -> activate#(V1) p13: U14#(tt(),V1,V2) -> U15#(isNat(activate(V1)),activate(V2)) p14: U14#(tt(),V1,V2) -> isNat#(activate(V1)) p15: U14#(tt(),V1,V2) -> activate#(V1) p16: U14#(tt(),V1,V2) -> activate#(V2) p17: U15#(tt(),V2) -> U16#(isNat(activate(V2))) p18: U15#(tt(),V2) -> isNat#(activate(V2)) p19: U15#(tt(),V2) -> activate#(V2) p20: U21#(tt(),V1) -> U22#(isNatKind(activate(V1)),activate(V1)) p21: U21#(tt(),V1) -> isNatKind#(activate(V1)) p22: U21#(tt(),V1) -> activate#(V1) p23: U22#(tt(),V1) -> U23#(isNat(activate(V1))) p24: U22#(tt(),V1) -> isNat#(activate(V1)) p25: U22#(tt(),V1) -> activate#(V1) p26: U31#(tt(),V2) -> U32#(isNatKind(activate(V2))) p27: U31#(tt(),V2) -> isNatKind#(activate(V2)) p28: U31#(tt(),V2) -> activate#(V2) p29: U51#(tt(),N) -> U52#(isNatKind(activate(N)),activate(N)) p30: U51#(tt(),N) -> isNatKind#(activate(N)) p31: U51#(tt(),N) -> activate#(N) p32: U52#(tt(),N) -> activate#(N) p33: U61#(tt(),M,N) -> U62#(isNatKind(activate(M)),activate(M),activate(N)) p34: U61#(tt(),M,N) -> isNatKind#(activate(M)) p35: U61#(tt(),M,N) -> activate#(M) p36: U61#(tt(),M,N) -> activate#(N) p37: U62#(tt(),M,N) -> U63#(isNat(activate(N)),activate(M),activate(N)) p38: U62#(tt(),M,N) -> isNat#(activate(N)) p39: U62#(tt(),M,N) -> activate#(N) p40: U62#(tt(),M,N) -> activate#(M) p41: U63#(tt(),M,N) -> U64#(isNatKind(activate(N)),activate(M),activate(N)) p42: U63#(tt(),M,N) -> isNatKind#(activate(N)) p43: U63#(tt(),M,N) -> activate#(N) p44: U63#(tt(),M,N) -> activate#(M) p45: U64#(tt(),M,N) -> s#(plus(activate(N),activate(M))) p46: U64#(tt(),M,N) -> plus#(activate(N),activate(M)) p47: U64#(tt(),M,N) -> activate#(N) p48: U64#(tt(),M,N) -> activate#(M) p49: isNat#(n__plus(V1,V2)) -> U11#(isNatKind(activate(V1)),activate(V1),activate(V2)) p50: isNat#(n__plus(V1,V2)) -> isNatKind#(activate(V1)) p51: isNat#(n__plus(V1,V2)) -> activate#(V1) p52: isNat#(n__plus(V1,V2)) -> activate#(V2) p53: isNat#(n__s(V1)) -> U21#(isNatKind(activate(V1)),activate(V1)) p54: isNat#(n__s(V1)) -> isNatKind#(activate(V1)) p55: isNat#(n__s(V1)) -> activate#(V1) p56: isNatKind#(n__plus(V1,V2)) -> U31#(isNatKind(activate(V1)),activate(V2)) p57: isNatKind#(n__plus(V1,V2)) -> isNatKind#(activate(V1)) p58: isNatKind#(n__plus(V1,V2)) -> activate#(V1) p59: isNatKind#(n__plus(V1,V2)) -> activate#(V2) p60: isNatKind#(n__s(V1)) -> U41#(isNatKind(activate(V1))) p61: isNatKind#(n__s(V1)) -> isNatKind#(activate(V1)) p62: isNatKind#(n__s(V1)) -> activate#(V1) p63: plus#(N,|0|()) -> U51#(isNat(N),N) p64: plus#(N,|0|()) -> isNat#(N) p65: plus#(N,s(M)) -> U61#(isNat(M),M,N) p66: plus#(N,s(M)) -> isNat#(M) p67: activate#(n__0()) -> |0|#() p68: activate#(n__plus(X1,X2)) -> plus#(X1,X2) p69: activate#(n__s(X)) -> s#(X) and R consists of: r1: U11(tt(),V1,V2) -> U12(isNatKind(activate(V1)),activate(V1),activate(V2)) r2: U12(tt(),V1,V2) -> U13(isNatKind(activate(V2)),activate(V1),activate(V2)) r3: U13(tt(),V1,V2) -> U14(isNatKind(activate(V2)),activate(V1),activate(V2)) r4: U14(tt(),V1,V2) -> U15(isNat(activate(V1)),activate(V2)) r5: U15(tt(),V2) -> U16(isNat(activate(V2))) r6: U16(tt()) -> tt() r7: U21(tt(),V1) -> U22(isNatKind(activate(V1)),activate(V1)) r8: U22(tt(),V1) -> U23(isNat(activate(V1))) r9: U23(tt()) -> tt() r10: U31(tt(),V2) -> U32(isNatKind(activate(V2))) r11: U32(tt()) -> tt() r12: U41(tt()) -> tt() r13: U51(tt(),N) -> U52(isNatKind(activate(N)),activate(N)) r14: U52(tt(),N) -> activate(N) r15: U61(tt(),M,N) -> U62(isNatKind(activate(M)),activate(M),activate(N)) r16: U62(tt(),M,N) -> U63(isNat(activate(N)),activate(M),activate(N)) r17: U63(tt(),M,N) -> U64(isNatKind(activate(N)),activate(M),activate(N)) r18: U64(tt(),M,N) -> s(plus(activate(N),activate(M))) r19: isNat(n__0()) -> tt() r20: isNat(n__plus(V1,V2)) -> U11(isNatKind(activate(V1)),activate(V1),activate(V2)) r21: isNat(n__s(V1)) -> U21(isNatKind(activate(V1)),activate(V1)) r22: isNatKind(n__0()) -> tt() r23: isNatKind(n__plus(V1,V2)) -> U31(isNatKind(activate(V1)),activate(V2)) r24: isNatKind(n__s(V1)) -> U41(isNatKind(activate(V1))) r25: plus(N,|0|()) -> U51(isNat(N),N) r26: plus(N,s(M)) -> U61(isNat(M),M,N) r27: |0|() -> n__0() r28: plus(X1,X2) -> n__plus(X1,X2) r29: s(X) -> n__s(X) r30: activate(n__0()) -> |0|() r31: activate(n__plus(X1,X2)) -> plus(X1,X2) r32: activate(n__s(X)) -> s(X) r33: activate(X) -> X The estimated dependency graph contains the following SCCs: {p1, p2, p3, p4, p5, p6, p7, p8, p9, p10, p11, p12, p13, p14, p15, p16, p18, p19, p20, p21, p22, p24, p25, p27, p28, p29, p30, p31, p32, p33, p34, p35, p36, p37, p38, p39, p40, p41, p42, p43, p44, p46, p47, p48, p49, p50, p51, p52, p53, p54, p55, p56, p57, p58, p59, p61, p62, p63, p64, p65, p66, p68} -- Reduction pair. Consider the dependency pair problem (P, R), where P consists of p1: U11#(tt(),V1,V2) -> U12#(isNatKind(activate(V1)),activate(V1),activate(V2)) p2: U12#(tt(),V1,V2) -> activate#(V1) p3: activate#(n__plus(X1,X2)) -> plus#(X1,X2) p4: plus#(N,s(M)) -> isNat#(M) p5: isNat#(n__s(V1)) -> activate#(V1) p6: isNat#(n__s(V1)) -> isNatKind#(activate(V1)) p7: isNatKind#(n__s(V1)) -> activate#(V1) p8: isNatKind#(n__s(V1)) -> isNatKind#(activate(V1)) p9: isNatKind#(n__plus(V1,V2)) -> activate#(V2) p10: isNatKind#(n__plus(V1,V2)) -> activate#(V1) p11: isNatKind#(n__plus(V1,V2)) -> isNatKind#(activate(V1)) p12: isNatKind#(n__plus(V1,V2)) -> U31#(isNatKind(activate(V1)),activate(V2)) p13: U31#(tt(),V2) -> activate#(V2) p14: U31#(tt(),V2) -> isNatKind#(activate(V2)) p15: isNat#(n__s(V1)) -> U21#(isNatKind(activate(V1)),activate(V1)) p16: U21#(tt(),V1) -> activate#(V1) p17: U21#(tt(),V1) -> isNatKind#(activate(V1)) p18: U21#(tt(),V1) -> U22#(isNatKind(activate(V1)),activate(V1)) p19: U22#(tt(),V1) -> activate#(V1) p20: U22#(tt(),V1) -> isNat#(activate(V1)) p21: isNat#(n__plus(V1,V2)) -> activate#(V2) p22: isNat#(n__plus(V1,V2)) -> activate#(V1) p23: isNat#(n__plus(V1,V2)) -> isNatKind#(activate(V1)) p24: isNat#(n__plus(V1,V2)) -> U11#(isNatKind(activate(V1)),activate(V1),activate(V2)) p25: U11#(tt(),V1,V2) -> activate#(V2) p26: U11#(tt(),V1,V2) -> activate#(V1) p27: U11#(tt(),V1,V2) -> isNatKind#(activate(V1)) p28: plus#(N,s(M)) -> U61#(isNat(M),M,N) p29: U61#(tt(),M,N) -> activate#(N) p30: U61#(tt(),M,N) -> activate#(M) p31: U61#(tt(),M,N) -> isNatKind#(activate(M)) p32: U61#(tt(),M,N) -> U62#(isNatKind(activate(M)),activate(M),activate(N)) p33: U62#(tt(),M,N) -> activate#(M) p34: U62#(tt(),M,N) -> activate#(N) p35: U62#(tt(),M,N) -> isNat#(activate(N)) p36: U62#(tt(),M,N) -> U63#(isNat(activate(N)),activate(M),activate(N)) p37: U63#(tt(),M,N) -> activate#(M) p38: U63#(tt(),M,N) -> activate#(N) p39: U63#(tt(),M,N) -> isNatKind#(activate(N)) p40: U63#(tt(),M,N) -> U64#(isNatKind(activate(N)),activate(M),activate(N)) p41: U64#(tt(),M,N) -> activate#(M) p42: U64#(tt(),M,N) -> activate#(N) p43: U64#(tt(),M,N) -> plus#(activate(N),activate(M)) p44: plus#(N,|0|()) -> isNat#(N) p45: plus#(N,|0|()) -> U51#(isNat(N),N) p46: U51#(tt(),N) -> activate#(N) p47: U51#(tt(),N) -> isNatKind#(activate(N)) p48: U51#(tt(),N) -> U52#(isNatKind(activate(N)),activate(N)) p49: U52#(tt(),N) -> activate#(N) p50: U12#(tt(),V1,V2) -> activate#(V2) p51: U12#(tt(),V1,V2) -> isNatKind#(activate(V2)) p52: U12#(tt(),V1,V2) -> U13#(isNatKind(activate(V2)),activate(V1),activate(V2)) p53: U13#(tt(),V1,V2) -> activate#(V1) p54: U13#(tt(),V1,V2) -> activate#(V2) p55: U13#(tt(),V1,V2) -> isNatKind#(activate(V2)) p56: U13#(tt(),V1,V2) -> U14#(isNatKind(activate(V2)),activate(V1),activate(V2)) p57: U14#(tt(),V1,V2) -> activate#(V2) p58: U14#(tt(),V1,V2) -> activate#(V1) p59: U14#(tt(),V1,V2) -> isNat#(activate(V1)) p60: U14#(tt(),V1,V2) -> U15#(isNat(activate(V1)),activate(V2)) p61: U15#(tt(),V2) -> activate#(V2) p62: U15#(tt(),V2) -> isNat#(activate(V2)) and R consists of: r1: U11(tt(),V1,V2) -> U12(isNatKind(activate(V1)),activate(V1),activate(V2)) r2: U12(tt(),V1,V2) -> U13(isNatKind(activate(V2)),activate(V1),activate(V2)) r3: U13(tt(),V1,V2) -> U14(isNatKind(activate(V2)),activate(V1),activate(V2)) r4: U14(tt(),V1,V2) -> U15(isNat(activate(V1)),activate(V2)) r5: U15(tt(),V2) -> U16(isNat(activate(V2))) r6: U16(tt()) -> tt() r7: U21(tt(),V1) -> U22(isNatKind(activate(V1)),activate(V1)) r8: U22(tt(),V1) -> U23(isNat(activate(V1))) r9: U23(tt()) -> tt() r10: U31(tt(),V2) -> U32(isNatKind(activate(V2))) r11: U32(tt()) -> tt() r12: U41(tt()) -> tt() r13: U51(tt(),N) -> U52(isNatKind(activate(N)),activate(N)) r14: U52(tt(),N) -> activate(N) r15: U61(tt(),M,N) -> U62(isNatKind(activate(M)),activate(M),activate(N)) r16: U62(tt(),M,N) -> U63(isNat(activate(N)),activate(M),activate(N)) r17: U63(tt(),M,N) -> U64(isNatKind(activate(N)),activate(M),activate(N)) r18: U64(tt(),M,N) -> s(plus(activate(N),activate(M))) r19: isNat(n__0()) -> tt() r20: isNat(n__plus(V1,V2)) -> U11(isNatKind(activate(V1)),activate(V1),activate(V2)) r21: isNat(n__s(V1)) -> U21(isNatKind(activate(V1)),activate(V1)) r22: isNatKind(n__0()) -> tt() r23: isNatKind(n__plus(V1,V2)) -> U31(isNatKind(activate(V1)),activate(V2)) r24: isNatKind(n__s(V1)) -> U41(isNatKind(activate(V1))) r25: plus(N,|0|()) -> U51(isNat(N),N) r26: plus(N,s(M)) -> U61(isNat(M),M,N) r27: |0|() -> n__0() r28: plus(X1,X2) -> n__plus(X1,X2) r29: s(X) -> n__s(X) r30: activate(n__0()) -> |0|() r31: activate(n__plus(X1,X2)) -> plus(X1,X2) r32: activate(n__s(X)) -> s(X) r33: activate(X) -> X The set of usable rules consists of r1, r2, r3, r4, r5, r6, r7, r8, r9, r10, r11, r12, r13, r14, r15, r16, r17, r18, r19, r20, r21, r22, r23, r24, r25, r26, r27, r28, r29, r30, r31, r32, r33 Take the reduction pair: lexicographic combination of reduction pairs: 1. matrix interpretations: carrier: N^2 order: standard order interpretations: U11#_A(x1,x2,x3) = ((0,1),(1,1)) x2 + ((1,1),(1,1)) x3 + (8,16) tt_A() = (1,10) U12#_A(x1,x2,x3) = ((0,1),(1,1)) x2 + ((1,1),(1,1)) x3 + (4,12) isNatKind_A(x1) = ((1,0),(1,0)) x1 activate_A(x1) = x1 + (1,1) activate#_A(x1) = ((0,1),(1,1)) x1 + (4,0) n__plus_A(x1,x2) = ((1,0),(1,1)) x1 + ((1,1),(1,1)) x2 + (12,8) plus#_A(x1,x2) = ((0,1),(1,1)) x1 + ((1,1),(1,1)) x2 + (2,20) s_A(x1) = x1 + (16,17) isNat#_A(x1) = ((0,1),(1,1)) x1 + (4,0) n__s_A(x1) = x1 + (15,16) isNatKind#_A(x1) = ((0,1),(1,1)) x1 + (2,0) U31#_A(x1,x2) = ((0,1),(1,1)) x2 + (9,2) U21#_A(x1,x2) = ((0,1),(1,1)) x2 + (6,4) U22#_A(x1,x2) = ((0,1),(1,1)) x2 + (5,2) U61#_A(x1,x2,x3) = ((1,1),(1,1)) x2 + ((0,1),(1,1)) x3 + (35,53) isNat_A(x1) = ((1,0),(1,1)) x1 + (6,1) U62#_A(x1,x2,x3) = ((1,1),(1,1)) x2 + ((0,1),(1,1)) x3 + (32,32) U63#_A(x1,x2,x3) = ((1,1),(1,1)) x2 + ((0,1),(1,1)) x3 + (8,28) U64#_A(x1,x2,x3) = ((1,1),(1,1)) x2 + ((0,1),(1,1)) x3 + (5,24) |0|_A() = (10,1) U51#_A(x1,x2) = ((0,1),(1,1)) x2 + (13,2) U52#_A(x1,x2) = ((0,1),(1,1)) x2 + (5,0) U13#_A(x1,x2,x3) = ((0,1),(0,0)) x1 + ((0,1),(1,1)) x2 + ((0,1),(1,1)) x3 + (0,8) U14#_A(x1,x2,x3) = ((0,1),(1,1)) x2 + ((0,1),(1,1)) x3 + (8,4) U15#_A(x1,x2) = ((0,1),(1,1)) x2 + (6,2) U16_A(x1) = (2,10) U15_A(x1,x2) = x2 + (3,10) U64_A(x1,x2,x3) = ((1,1),(1,1)) x2 + ((1,0),(1,1)) x3 + (33,29) plus_A(x1,x2) = ((1,0),(1,1)) x1 + ((1,1),(1,1)) x2 + (13,8) U14_A(x1,x2,x3) = x3 + (5,10) U63_A(x1,x2,x3) = ((1,1),(1,1)) x2 + ((1,0),(1,1)) x3 + (37,33) U13_A(x1,x2,x3) = x2 + x3 + (7,10) U23_A(x1) = (2,10) U52_A(x1,x2) = x2 + (2,1) U62_A(x1,x2,x3) = ((1,1),(1,1)) x2 + ((1,0),(1,1)) x3 + (41,37) U12_A(x1,x2,x3) = x2 + ((1,1),(1,0)) x3 + (10,10) U22_A(x1,x2) = (3,10) U32_A(x1) = (2,10) U51_A(x1,x2) = ((1,0),(1,1)) x2 + (4,2) U61_A(x1,x2,x3) = ((1,1),(1,1)) x2 + ((1,0),(1,1)) x3 + (45,41) U11_A(x1,x2,x3) = x2 + ((1,1),(1,0)) x3 + (14,11) U21_A(x1,x2) = x1 + x2 + (4,0) U31_A(x1,x2) = x1 + (3,0) U41_A(x1) = x1 + (14,10) n__0_A() = (10,1) 2. matrix interpretations: carrier: N^2 order: standard order interpretations: U11#_A(x1,x2,x3) = ((0,1),(1,1)) x3 + (3,5) tt_A() = (0,4) U12#_A(x1,x2,x3) = ((1,0),(1,1)) x3 + (7,6) isNatKind_A(x1) = ((0,1),(0,1)) x1 + (1,0) activate_A(x1) = x1 + (2,2) activate#_A(x1) = (4,6) n__plus_A(x1,x2) = ((0,1),(1,1)) x1 + x2 + (1,1) plus#_A(x1,x2) = ((1,1),(1,0)) x2 + (5,0) s_A(x1) = ((1,1),(0,1)) x1 + (1,4) isNat#_A(x1) = (4,1) n__s_A(x1) = ((1,1),(1,1)) x1 + (0,4) isNatKind#_A(x1) = (2,5) U31#_A(x1,x2) = (2,5) U21#_A(x1,x2) = (4,4) U22#_A(x1,x2) = (4,4) U61#_A(x1,x2,x3) = ((1,1),(1,0)) x2 + (2,1) isNat_A(x1) = (0,0) U62#_A(x1,x2,x3) = x2 + (0,1) U63#_A(x1,x2,x3) = ((1,1),(1,0)) x2 + (15,4) U64#_A(x1,x2,x3) = ((1,1),(1,0)) x2 + (10,2) |0|_A() = (6,1) U51#_A(x1,x2) = (2,6) U52#_A(x1,x2) = (5,6) U13#_A(x1,x2,x3) = (6,6) U14#_A(x1,x2,x3) = (5,6) U15#_A(x1,x2) = (6,7) U16_A(x1) = (2,2) U15_A(x1,x2) = (1,1) U64_A(x1,x2,x3) = ((0,1),(0,0)) x2 + ((0,1),(0,0)) x3 + (0,1) plus_A(x1,x2) = ((0,1),(1,1)) x1 + x2 + (3,3) U14_A(x1,x2,x3) = ((0,0),(1,0)) x3 U63_A(x1,x2,x3) = ((1,1),(1,1)) x2 U13_A(x1,x2,x3) = ((1,1),(1,0)) x2 + ((1,1),(0,0)) x3 + (1,0) U23_A(x1) = (1,3) U52_A(x1,x2) = ((0,1),(1,1)) x2 + (0,2) U62_A(x1,x2,x3) = ((0,1),(1,1)) x2 U12_A(x1,x2,x3) = x2 + ((1,1),(0,0)) x3 U22_A(x1,x2) = (0,2) U32_A(x1) = (4,3) U51_A(x1,x2) = (10,4) U61_A(x1,x2,x3) = ((1,1),(0,0)) x2 U11_A(x1,x2,x3) = ((1,1),(1,0)) x2 + (3,0) U21_A(x1,x2) = (1,1) U31_A(x1,x2) = (3,2) U41_A(x1) = x1 + (1,3) n__0_A() = (4,0) The next rules are strictly ordered: p1, p2, p3, p4, p5, p6, p7, p8, p9, p10, p11, p13, p14, p15, p16, p17, p19, p21, p22, p23, p24, p25, p26, p27, p28, p29, p30, p31, p33, p34, p35, p36, p37, p38, p39, p40, p41, p42, p43, p44, p45, p46, p47, p48, p49, p50, p51, p52, p53, p54, p55, p56, p57, p58, p59, p60, p61, p62 We remove them from the problem. -- SCC decomposition. Consider the dependency pair problem (P, R), where P consists of p1: isNatKind#(n__plus(V1,V2)) -> U31#(isNatKind(activate(V1)),activate(V2)) p2: U21#(tt(),V1) -> U22#(isNatKind(activate(V1)),activate(V1)) p3: U22#(tt(),V1) -> isNat#(activate(V1)) p4: U61#(tt(),M,N) -> U62#(isNatKind(activate(M)),activate(M),activate(N)) and R consists of: r1: U11(tt(),V1,V2) -> U12(isNatKind(activate(V1)),activate(V1),activate(V2)) r2: U12(tt(),V1,V2) -> U13(isNatKind(activate(V2)),activate(V1),activate(V2)) r3: U13(tt(),V1,V2) -> U14(isNatKind(activate(V2)),activate(V1),activate(V2)) r4: U14(tt(),V1,V2) -> U15(isNat(activate(V1)),activate(V2)) r5: U15(tt(),V2) -> U16(isNat(activate(V2))) r6: U16(tt()) -> tt() r7: U21(tt(),V1) -> U22(isNatKind(activate(V1)),activate(V1)) r8: U22(tt(),V1) -> U23(isNat(activate(V1))) r9: U23(tt()) -> tt() r10: U31(tt(),V2) -> U32(isNatKind(activate(V2))) r11: U32(tt()) -> tt() r12: U41(tt()) -> tt() r13: U51(tt(),N) -> U52(isNatKind(activate(N)),activate(N)) r14: U52(tt(),N) -> activate(N) r15: U61(tt(),M,N) -> U62(isNatKind(activate(M)),activate(M),activate(N)) r16: U62(tt(),M,N) -> U63(isNat(activate(N)),activate(M),activate(N)) r17: U63(tt(),M,N) -> U64(isNatKind(activate(N)),activate(M),activate(N)) r18: U64(tt(),M,N) -> s(plus(activate(N),activate(M))) r19: isNat(n__0()) -> tt() r20: isNat(n__plus(V1,V2)) -> U11(isNatKind(activate(V1)),activate(V1),activate(V2)) r21: isNat(n__s(V1)) -> U21(isNatKind(activate(V1)),activate(V1)) r22: isNatKind(n__0()) -> tt() r23: isNatKind(n__plus(V1,V2)) -> U31(isNatKind(activate(V1)),activate(V2)) r24: isNatKind(n__s(V1)) -> U41(isNatKind(activate(V1))) r25: plus(N,|0|()) -> U51(isNat(N),N) r26: plus(N,s(M)) -> U61(isNat(M),M,N) r27: |0|() -> n__0() r28: plus(X1,X2) -> n__plus(X1,X2) r29: s(X) -> n__s(X) r30: activate(n__0()) -> |0|() r31: activate(n__plus(X1,X2)) -> plus(X1,X2) r32: activate(n__s(X)) -> s(X) r33: activate(X) -> X The estimated dependency graph contains the following SCCs: (no SCCs)