MAYBE

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

Proof:
 RT Transformation Processor:
  strict:
   a(a(a(x1))) -> b(c(x1))
   c(b(x1)) -> a(a(a(a(c(x1)))))
  weak:
   
  Matrix Interpretation Processor:
   dimension: 1
   interpretation:
    [b](x0) = x0 + 3,
    
    [c](x0) = x0 + 20,
    
    [a](x0) = x0
   orientation:
    a(a(a(x1))) = x1 >= x1 + 23 = b(c(x1))
    
    c(b(x1)) = x1 + 23 >= x1 + 20 = a(a(a(a(c(x1)))))
   problem:
    strict:
     a(a(a(x1))) -> b(c(x1))
    weak:
     c(b(x1)) -> a(a(a(a(c(x1)))))
   Open