U41ttNU52ttsplusNMU72ttplusxNMNU11ttU12isNatU12ttttU21ttttU31ttU32isNatU32ttttU51ttU52isNatU61tt0U71ttU72isNatisNatttisNatU11isNatisNatU21isNatisNatU31isNatplusN0U41isNatplusNsMU51isNatxN0U61isNatxNsMU71isNat2.1AProVEunknownStatistics for single proof: 100,00 % (1 real / 0 unknown / 0 assumptions / 1 total proof steps)http://aprove.informatik.rwth-aachen.deJohnDoe