MAYBE
* Step 1: Failure MAYBE
  + Considered Problem:
      Rules:
        0. start(A,B,C) -> eval(A,B,C)              True     (1,1)
        1. eval(A,B,C)  -> eval(A + C,B,-2 + C)     [A >= 0] (?,1)
        2. eval(A,B,C)  -> eval(A + B,-2 + B,1 + C) [A >= 0] (?,1)
      Signature:
        {(eval,3);(start,3)}
      Flow Graph:
        [0->{1,2},1->{1,2},2->{1,2}]
      
  + Applied Processor:
      Failing "Open problems left."
  + Details:
      Open problems left.
MAYBE