MAYBE

Problem:
 a(a(a(x1))) -> a(a(b(b(x1))))
 b(b(b(b(x1)))) -> a(b(a(a(x1))))

Proof:
 RT Transformation Processor:
  strict:
   a(a(a(x1))) -> a(a(b(b(x1))))
   b(b(b(b(x1)))) -> a(b(a(a(x1))))
  weak:
   
  Matrix Interpretation Processor:
   dimension: 1
   interpretation:
    [b](x0) = x0 + 4,
    
    [a](x0) = x0 + 1
   orientation:
    a(a(a(x1))) = x1 + 3 >= x1 + 10 = a(a(b(b(x1))))
    
    b(b(b(b(x1)))) = x1 + 16 >= x1 + 7 = a(b(a(a(x1))))
   problem:
    strict:
     a(a(a(x1))) -> a(a(b(b(x1))))
    weak:
     b(b(b(b(x1)))) -> a(b(a(a(x1))))
   Open