MAYBE

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

Proof:
 RT Transformation Processor:
  strict:
   a(x1) -> b(c(x1))
   a(b(x1)) -> x1
   a(b(b(x1))) -> b(b(a(a(x1))))
  weak:
   
  Matrix Interpretation Processor:
   dimension: 1
   interpretation:
    [b](x0) = x0,
    
    [c](x0) = x0 + 1,
    
    [a](x0) = x0 + 2
   orientation:
    a(x1) = x1 + 2 >= x1 + 1 = b(c(x1))
    
    a(b(x1)) = x1 + 2 >= x1 = x1
    
    a(b(b(x1))) = x1 + 2 >= x1 + 4 = b(b(a(a(x1))))
   problem:
    strict:
     a(b(b(x1))) -> b(b(a(a(x1))))
    weak:
     a(x1) -> b(c(x1))
     a(b(x1)) -> x1
   Open