0.00/0.30 NO 0.00/0.30 0.00/0.30 0.00/0.30 The system was reversed. 0.00/0.30 0.00/0.30 Remains to prove termination of the 2-rule system 0.00/0.30 { b a a -> a a a c c a , 0.00/0.30 c a -> b } 0.00/0.30 0.00/0.30 0.00/0.30 Loop of length 16 starting with a string of length 9 using right expansion 0.00/0.30 and the encoding {a=b, b=a, c=c}: 0.00/0.30 0.00/0.30 .abb.bbbbbb 0.00/0.30 rule abb -> bbbccb at position 0 0.00/0.30 .bbbccb.bbbbbb 0.00/0.30 rule cb -> a at position 4 0.00/0.30 .bbbca.bbbbbb 0.00/0.30 rule abb -> bbbccb at position 4 0.00/0.30 .bbbcbbbccb.bbbb 0.00/0.30 rule cb -> a at position 3 0.00/0.30 .bbbabbccb.bbbb 0.00/0.30 rule cb -> a at position 7 0.00/0.30 .bbbabbca.bbbb 0.00/0.30 rule abb -> bbbccb at position 7 0.00/0.30 .bbbabbcbbbccb.bb 0.00/0.30 rule cb -> a at position 6 0.00/0.30 .bbbabbabbccb.bb 0.00/0.30 rule abb -> bbbccb at position 6 0.00/0.30 .bbbabbbbbccbccb.bb 0.00/0.30 rule cb -> a at position 10 0.00/0.30 .bbbabbbbbcaccb.bb 0.00/0.30 rule cb -> a at position 12 0.00/0.30 .bbbabbbbbcaca.bb 0.00/0.30 rule abb -> bbbccb at position 12 0.00/0.30 .bbbabbbbbcacbbbccb. 0.00/0.30 rule cb -> a at position 11 0.00/0.30 .bbbabbbbbcaabbccb. 0.00/0.30 rule abb -> bbbccb at position 11 0.00/0.30 .bbbabbbbbcabbbccbccb. 0.00/0.30 rule abb -> bbbccb at position 10 0.00/0.30 .bbbabbbbbcbbbccbbccbccb. 0.00/0.30 rule cb -> a at position 9 0.00/0.30 .bbbabbbbbabbccbbccbccb. 0.00/0.30 rule abb -> bbbccb at position 9 0.00/0.30 .bbbabbbbbbbbccbccbbccbccb. 0.00/0.32 EOF