zeroscons0U11ttU12isNatListU12ttttU21ttU22isNatU22ttttU31ttU32isNatListU32ttttU41ttU42isNatU42ttU43isNatIListU43ttttU51ttU52isNatU52ttU53isNatListU53ttttisNatttisNatU11isNatIListKindisNatU21isNatKindisNatIListU31isNatIListKindisNatIListttisNatIListU41andisNatKindisNatIListKindttisNatIListKindandisNatKindisNatKindttisNatKindisNatIListKindisNatKindisNatKindisNatListttisNatListU51andisNatKindlengthnil0lengthconsNU61andandisNatListU61ttslengthLandttX2.1isNatKindisNatKindisNatKindisNatKindAProVEunknownStatistics for single proof: 100,00 % (1 real / 0 unknown / 0 assumptions / 1 total proof steps)http://aprove.informatik.rwth-aachen.deJohnDoe