0.00/0.27 NO 0.00/0.27 0.00/0.27 0.00/0.27 The system was reversed. 0.00/0.27 0.00/0.27 Remains to prove termination of the 2-rule system 0.00/0.27 { a a a -> b b a , 0.00/0.27 b a b -> a b a } 0.00/0.27 0.00/0.27 0.00/0.27 Loop of length 6 starting with a string of length 6 using right expansion 0.00/0.27 and the encoding {a=a, b=b}: 0.00/0.27 0.00/0.27 .aaa.baa 0.00/0.27 rule aaa -> bba at position 0 0.00/0.27 .bba.baa 0.00/0.27 rule bab -> aba at position 1 0.00/0.27 .baba.aa 0.00/0.27 rule bab -> aba at position 0 0.00/0.27 .abaa.aa 0.00/0.27 rule aaa -> bba at position 3 0.00/0.27 .ababba. 0.00/0.27 rule bab -> aba at position 1 0.00/0.27 .aababa. 0.00/0.27 rule bab -> aba at position 2 0.00/0.27 .aaabaa. 0.00/0.31 EOF