MAYBE

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

Proof:
 RT Transformation Processor:
  strict:
   a(x1) -> x1
   a(b(x1)) -> c(b(c(a(x1))))
   c(c(x1)) -> c(b(a(x1)))
  weak:
   
  Matrix Interpretation Processor:
   dimension: 1
   interpretation:
    [c](x0) = x0 + 2,
    
    [b](x0) = x0 + 4,
    
    [a](x0) = x0 + 18
   orientation:
    a(x1) = x1 + 18 >= x1 = x1
    
    a(b(x1)) = x1 + 22 >= x1 + 26 = c(b(c(a(x1))))
    
    c(c(x1)) = x1 + 4 >= x1 + 24 = c(b(a(x1)))
   problem:
    strict:
     a(b(x1)) -> c(b(c(a(x1))))
     c(c(x1)) -> c(b(a(x1)))
    weak:
     a(x1) -> x1
   Matrix Interpretation Processor:
    dimension: 1
    interpretation:
     [c](x0) = x0 + 18,
     
     [b](x0) = x0 + 2,
     
     [a](x0) = x0 + 2
    orientation:
     a(b(x1)) = x1 + 4 >= x1 + 40 = c(b(c(a(x1))))
     
     c(c(x1)) = x1 + 36 >= x1 + 22 = c(b(a(x1)))
     
     a(x1) = x1 + 2 >= x1 = x1
    problem:
     strict:
      a(b(x1)) -> c(b(c(a(x1))))
     weak:
      c(c(x1)) -> c(b(a(x1)))
      a(x1) -> x1
    Open