TRS: { a__U101(tt(), N, XS) -> a__fst(a__splitAt(mark(N), mark(XS))), a__U11(tt(), N, XS) -> a__snd(a__splitAt(mark(N), mark(XS))), a__U21(tt(), X) -> mark(X), a__U31(tt(), N) -> mark(N), a__U41(tt(), N) -> cons(mark(N), natsFrom(s(N))), a__U51(tt(), N, XS) -> a__head(a__afterNth(mark(N), mark(XS))), a__U61(tt(), Y) -> mark(Y), a__U71(tt(), XS) -> pair(nil(), mark(XS)), a__U81(tt(), N, X, XS) -> a__U82(a__splitAt(mark(N), mark(XS)), X), a__U82(pair(YS, ZS), X) -> pair(cons(mark(X), YS), mark(ZS)), a__U91(tt(), XS) -> mark(XS), a__afterNth(N, XS) -> a__U11(a__and(a__isNatural(N), isLNat(XS)), N, XS), a__and(tt(), X) -> mark(X), a__fst(pair(X, Y)) -> a__U21(a__and(a__isLNat(X), isLNat(Y)), X), a__head(cons(N, XS)) -> a__U31(a__and(a__isNatural(N), isLNat(XS)), N), a__isLNat(nil()) -> tt(), a__isLNat(afterNth(V1, V2)) -> a__and(a__isNatural(V1), isLNat(V2)), a__isLNat(cons(V1, V2)) -> a__and(a__isNatural(V1), isLNat(V2)), a__isLNat(fst(V1)) -> a__isPLNat(V1), a__isLNat(natsFrom(V1)) -> a__isNatural(V1), a__isLNat(snd(V1)) -> a__isPLNat(V1), a__isLNat(tail(V1)) -> a__isLNat(V1), a__isLNat(take(V1, V2)) -> a__and(a__isNatural(V1), isLNat(V2)), a__isNatural(0()) -> tt(), a__isNatural(head(V1)) -> a__isLNat(V1), a__isNatural(s(V1)) -> a__isNatural(V1), a__isNatural(sel(V1, V2)) -> a__and(a__isNatural(V1), isLNat(V2)), a__isPLNat(pair(V1, V2)) -> a__and(a__isLNat(V1), isLNat(V2)), a__isPLNat(splitAt(V1, V2)) -> a__and(a__isNatural(V1), isLNat(V2)), a__natsFrom(N) -> a__U41(a__isNatural(N), N), a__sel(N, XS) -> a__U51(a__and(a__isNatural(N), isLNat(XS)), N, XS), a__snd(pair(X, Y)) -> a__U61(a__and(a__isLNat(X), isLNat(Y)), Y), a__splitAt(0(), XS) -> a__U71(a__isLNat(XS), XS), a__splitAt(s(N), cons(X, XS)) -> a__U81(a__and(a__isNatural(N), and(isNatural(X), isLNat(XS))), N, X, XS), a__tail(cons(N, XS)) -> a__U91(a__and(a__isNatural(N), isLNat(XS)), XS), a__take(N, XS) -> a__U101(a__and(a__isNatural(N), isLNat(XS)), N, XS), mark(U101(X1, X2, X3)) -> a__U101(mark(X1), X2, X3), mark(fst(X)) -> a__fst(mark(X)), mark(splitAt(X1, X2)) -> a__splitAt(mark(X1), mark(X2)), mark(U11(X1, X2, X3)) -> a__U11(mark(X1), X2, X3), mark(snd(X)) -> a__snd(mark(X)), mark(U21(X1, X2)) -> a__U21(mark(X1), X2), mark(U31(X1, X2)) -> a__U31(mark(X1), X2), mark(U41(X1, X2)) -> a__U41(mark(X1), X2), mark(natsFrom(X)) -> a__natsFrom(mark(X)), mark(U51(X1, X2, X3)) -> a__U51(mark(X1), X2, X3), mark(head(X)) -> a__head(mark(X)), mark(afterNth(X1, X2)) -> a__afterNth(mark(X1), mark(X2)), mark(U61(X1, X2)) -> a__U61(mark(X1), X2), mark(U71(X1, X2)) -> a__U71(mark(X1), X2), mark(U81(X1, X2, X3, X4)) -> a__U81(mark(X1), X2, X3, X4), mark(U82(X1, X2)) -> a__U82(mark(X1), X2), mark(U91(X1, X2)) -> a__U91(mark(X1), X2), mark(and(X1, X2)) -> a__and(mark(X1), X2), mark(isNatural(X)) -> a__isNatural(X), mark(isLNat(X)) -> a__isLNat(X), mark(isPLNat(X)) -> a__isPLNat(X), mark(tail(X)) -> a__tail(mark(X)), mark(take(X1, X2)) -> a__take(mark(X1), mark(X2)), mark(sel(X1, X2)) -> a__sel(mark(X1), mark(X2)), mark(tt()) -> tt(), mark(cons(X1, X2)) -> cons(mark(X1), X2), mark(s(X)) -> s(mark(X)), mark(pair(X1, X2)) -> pair(mark(X1), mark(X2)), mark(nil()) -> nil(), mark(0()) -> 0(), a__U101(X1, X2, X3) -> U101(X1, X2, X3), a__fst(X) -> fst(X), a__splitAt(X1, X2) -> splitAt(X1, X2), a__U11(X1, X2, X3) -> U11(X1, X2, X3), a__snd(X) -> snd(X), a__U21(X1, X2) -> U21(X1, X2), a__U31(X1, X2) -> U31(X1, X2), a__U41(X1, X2) -> U41(X1, X2), a__natsFrom(X) -> natsFrom(X), a__U51(X1, X2, X3) -> U51(X1, X2, X3), a__head(X) -> head(X), a__afterNth(X1, X2) -> afterNth(X1, X2), a__U61(X1, X2) -> U61(X1, X2), a__U71(X1, X2) -> U71(X1, X2), a__U81(X1, X2, X3, X4) -> U81(X1, X2, X3, X4), a__U82(X1, X2) -> U82(X1, X2), a__U91(X1, X2) -> U91(X1, X2), a__and(X1, X2) -> and(X1, X2), a__isNatural(X) -> isNatural(X), a__isLNat(X) -> isLNat(X), a__isPLNat(X) -> isPLNat(X), a__tail(X) -> tail(X), a__take(X1, X2) -> take(X1, X2), a__sel(X1, X2) -> sel(X1, X2)} Fail