0.00/0.26 NO 0.00/0.26 0.00/0.26 0.00/0.26 The system was reversed. 0.00/0.26 0.00/0.26 Remains to prove termination of the 2-rule system 0.00/0.26 { c b -> b b a , 0.00/0.26 a b -> b c a } 0.00/0.26 0.00/0.26 0.00/0.26 Loop of length 10 starting with a string of length 6 using right expansion 0.00/0.26 and the encoding {a=c, b=b, c=a}: 0.00/0.26 0.00/0.26 .ab.bbbb 0.00/0.26 rule ab -> bbc at position 0 0.00/0.26 .bbc.bbbb 0.00/0.26 rule cb -> bac at position 2 0.00/0.26 .bbbac.bbb 0.00/0.26 rule cb -> bac at position 4 0.00/0.26 .bbbabac.bb 0.00/0.26 rule cb -> bac at position 6 0.00/0.26 .bbbababac.b 0.00/0.26 rule ab -> bbc at position 5 0.00/0.26 .bbbabbbcac.b 0.00/0.26 rule cb -> bac at position 9 0.00/0.26 .bbbabbbcabac. 0.00/0.26 rule ab -> bbc at position 8 0.00/0.26 .bbbabbbcbbcac. 0.00/0.26 rule cb -> bac at position 7 0.00/0.26 .bbbabbbbacbcac. 0.00/0.26 rule cb -> bac at position 9 0.00/0.26 .bbbabbbbabaccac. 0.00/0.26 rule ab -> bbc at position 8 0.00/0.26 .bbbabbbbbbcaccac. 0.00/0.30 EOF