YES(?,O(n^1))

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

Proof:
 Matrix Interpretation Processor:
  dimension: 1
  interpretation:
   [c](x0) = x0 + 11,
   
   [b](x0) = x0 + 17,
   
   [a](x0) = x0 + 26
  orientation:
   a(a(x1)) = x1 + 52 >= x1 + 51 = b(b(b(x1)))
   
   b(b(x1)) = x1 + 34 >= x1 + 33 = c(c(c(x1)))
   
   c(c(c(c(x1)))) = x1 + 44 >= x1 + 43 = a(b(x1))
  problem:
   
  Qed