U41ttNU51ttsplusNMU71ttplusxNMNandttXU11ttU12isNatU12ttU13isNatU13ttttU21ttU22isNatU22ttttU31ttU32isNatU32ttU33isNatU33ttttU61tt0isNatttisNatU11andisNatKindisNatU21isNatKindisNatU31andisNatKindisNatKindttisNatKindandisNatKindisNatKindisNatKindplusN0U41andisNatplusNsMU51andandisNatxN0U61andisNatxNsMU71andandisNat2.1AProVEAProVE Commit ID: 794c25de1cacf0d048858bcd21c9a779e1221865 marcel 20200619 unpublished dirty Statistics for single proof: 100.00 % (1 real / 0 unknown / 0 assumptions / 1 total proof steps)http://aprove.informatik.rwth-aachen.deJohnDoe