MAYBE

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

Proof:
 Complexity Transformation Processor:
  strict:
   b(b(b(b(x1)))) -> b(b(b(a(b(x1)))))
   b(a(b(b(a(b(x1)))))) -> b(b(a(b(b(x1)))))
  weak:
   
  Matrix Interpretation Processor:
   dimension: 1
   max_matrix:
    1
    interpretation:
     [a](x0) = x0 + 1,
     
     [b](x0) = x0
    orientation:
     b(b(b(b(x1)))) = x1 >= x1 + 1 = b(b(b(a(b(x1)))))
     
     b(a(b(b(a(b(x1)))))) = x1 + 2 >= x1 + 1 = b(b(a(b(b(x1)))))
    problem:
     strict:
      b(b(b(b(x1)))) -> b(b(b(a(b(x1)))))
     weak:
      b(a(b(b(a(b(x1)))))) -> b(b(a(b(b(x1)))))
    Open