zeros cons 0 n__zeros U11 tt L s length activate L and tt X activate X isNat n__0 tt isNat n__length V1 isNatList activate V1 isNat n__s V1 isNat activate V1 isNatIList V isNatList activate V isNatIList n__zeros tt isNatIList n__cons V1 V2 and isNat activate V1 n__isNatIList activate V2 isNatList n__nil tt isNatList n__cons V1 V2 and isNat activate V1 n__isNatList activate V2 length nil 0 length cons N L U11 and isNatList activate L n__isNat N activate L zeros n__zeros 0 n__0 length X n__length X s X n__s X cons X1 X2 n__cons X1 X2 isNatIList X n__isNatIList X nil n__nil isNatList X n__isNatList X isNat X n__isNat X activate n__zeros zeros activate n__0 0 activate n__length X length activate X activate n__s X s activate X activate n__cons X1 X2 cons activate X1 X2 activate n__isNatIList X isNatIList X activate n__nil nil activate n__isNatList X isNatList X activate n__isNat X isNat X activate X X 2.2 U11 tt L length activate L isNat n__length V1 isNatList activate V1 activate n__s X activate X zeros cons 0 n__zeros zeros 0 isNat n__s V1 activate V1 isNatIList n__cons V1 V2 isNat activate V1 length cons N L isNatList activate L length cons N L activate L activate n__isNatList X isNatList X activate n__isNat X isNat X isNatIList n__cons V1 V2 and isNat activate V1 n__isNatIList activate V2 activate n__isNatIList X isNatIList X isNatIList n__cons V1 V2 activate V1 isNat n__length V1 activate V1 activate n__length X length activate X activate n__0 0 length cons N L U11 and isNatList activate L n__isNat N activate L length cons N L activate L activate n__cons X1 X2 activate X1 isNat n__s V1 isNat activate V1 isNatIList V activate V length nil 0 activate n__s X s activate X isNatIList V isNatList activate V isNatList n__cons V1 V2 isNat activate V1 activate n__cons X1 X2 cons activate X1 X2 isNatList n__cons V1 V2 activate V2 activate n__length X activate X and tt X activate X activate n__zeros zeros isNatList n__cons V1 V2 and isNat activate V1 n__isNatList activate V2 U11 tt L activate L U11 tt L s length activate L length cons N L and isNatList activate L n__isNat N isNatIList n__cons V1 V2 activate V2 activate n__nil nil isNatList n__cons V1 V2 activate V1 true isNatList n__cons V1 V2 activate V1 activate n__length X length activate X isNat n__length V1 activate V1 isNatIList n__cons V1 V2 activate V1 isNatIList n__cons V1 V2 activate V2 activate n__isNatIList X isNatIList X isNatIList n__cons V1 V2 and isNat activate V1 n__isNatIList activate V2 length cons N L and isNatList activate L n__isNat N activate n__isNat X isNat X U11 tt L activate L activate n__isNatList X isNatList X isNatList n__cons V1 V2 and isNat activate V1 n__isNatList activate V2 and tt X activate X activate n__length X activate X length cons N L activate L length cons N L isNatList activate L isNatIList n__cons V1 V2 isNat activate V1 isNatList n__cons V1 V2 activate V2 isNatList n__cons V1 V2 isNat activate V1 isNat n__s V1 activate V1 isNatIList V isNatList activate V isNatIList V activate V isNat n__s V1 isNat activate V1 activate n__cons X1 X2 activate X1 length cons N L activate L length cons N L U11 and isNatList activate L n__isNat N activate L activate n__s X activate X isNat n__length V1 isNatList activate V1 U11 tt L length activate L true 0 0 0 isNatList 1 1 14138 U11 2 2 33404 cons 2 0 s 1 1 0 isNat 1 1 14137 activate 1 1 0 and 2 2 0 n__zeros 0 0 isNatIList 1 1 14139 activate 1 1 0 zeros 0 0 n__nil 0 24446 n__s 1 1 0 0 0 0 zeros 0 0 n__isNatList 1 1 14138 isNatList 1 1 14138 s 1 0 n__cons 2 1 2 0 nil 0 24446 n__isNat 1 1 33402 nil 0 0 n__0 0 0 n__length 1 1 33404 isNat 1 1 33402 U11 2 2 33403 cons 2 1 2 0 n__isNatIList 1 1 14139 isNatIList 1 1 14139 tt 0 1 length 1 1 33404 length 1 1 33403 and 2 2 0 U11 tt L length activate L activate n__s X activate X length cons N L U11 and isNatList activate L n__isNat N activate L activate n__cons X1 X2 activate X1 isNat n__s V1 isNat activate V1 and tt X activate X isNatList n__cons V1 V2 and isNat activate V1 n__isNatList activate V2 activate n__isNatList X isNatList X isNatIList n__cons V1 V2 and isNat activate V1 n__isNatIList activate V2 activate n__isNatIList X isNatIList X cons X1 X2 n__cons X1 X2 isNat n__0 tt 0 n__0 isNatIList n__zeros tt zeros cons 0 n__zeros and tt X activate X length X n__length X isNatList X n__isNatList X activate n__s X s activate X isNatIList X n__isNatIList X activate X X s X n__s X activate n__cons X1 X2 cons activate X1 X2 isNat X n__isNat X activate n__isNatIList X isNatIList X isNat n__length V1 isNatList activate V1 isNatList n__nil tt isNatIList V isNatList activate V nil n__nil activate n__length X length activate X activate n__isNatList X isNatList X zeros n__zeros activate n__isNat X isNat X length nil 0 activate n__zeros zeros activate n__0 0 isNatList n__cons V1 V2 and isNat activate V1 n__isNatList activate V2 isNatIList n__cons V1 V2 and isNat activate V1 n__isNatIList activate V2 length cons N L U11 and isNatList activate L n__isNat N activate L isNat n__s V1 isNat activate V1 activate n__nil nil U11 tt L s length activate L and tt X activate X activate n__s X activate X activate n__cons X1 X2 activate X1 activate n__isNatIList X isNatIList X activate n__isNatList X isNatList X isNatList n__cons V1 V2 and isNat activate V1 n__isNatList activate V2 isNatIList n__cons V1 V2 and isNat activate V1 n__isNatIList activate V2 true 0 0 0 isNatList 1 7 U11 2 4 cons 2 0 s 1 4 isNat 1 14137 activate 1 3 and 2 9 n__zeros 0 4 isNatIList 1 1 4 activate 1 1 0 zeros 0 3 n__nil 0 24447 n__s 1 1 2 0 0 9 zeros 0 0 n__isNatList 1 8 isNatList 1 8 s 1 0 n__cons 2 1 4 nil 0 24446 n__isNat 1 1 nil 0 0 n__0 0 9 n__length 1 1 6 isNat 1 1 0 U11 2 33403 cons 2 3 n__isNatIList 1 5 isNatIList 1 5 tt 0 9 length 1 4 length 1 33403 and 2 2 0 isNatIList n__cons V1 V2 and isNat activate V1 n__isNatIList activate V2 isNatList n__cons V1 V2 and isNat activate V1 n__isNatList activate V2 activate n__isNatList X isNatList X activate n__isNatIList X isNatIList X and tt X activate X and tt X activate X activate n__isNatIList X isNatIList X activate n__isNatList X isNatList X isNatList n__cons V1 V2 and isNat activate V1 n__isNatList activate V2 isNatIList n__cons V1 V2 and isNat activate V1 n__isNatIList activate V2 true Failed! NaTT certifiable-1.6