MAYBE
Input TRS:
      1: a(x1) -> b(c(x1))
      2: a(b(b(x1))) -> c(a(a(a(x1))))
      3: c(c(x1)) -> x1
Number of strict rules: 3
Direct POLO(bPol) ... failed.
Uncurrying ... failed.
Dependency Pairs:
     #1: #a(b(b(x1))) -> #c(a(a(a(x1))))
     #2: #a(b(b(x1))) -> #a(a(a(x1)))
     #3: #a(b(b(x1))) -> #a(a(x1))
     #4: #a(b(b(x1))) -> #a(x1)
     #5: #a(x1) -> #c(x1)
Number of SCCs: 1, DPs: 3
  SCC { #2..4 }
POLO(Sum)... succeeded.
      a 	w: x1 + 7720
      b 	w: x1 + 7720
      c 	w: x1
      #c 	w: 0
      #a 	w: x1
    USABLE RULES: { 1..3 }
    Removed DPs: #3 #4
Number of SCCs: 1, DPs: 1
  SCC { #2 }
POLO(Sum)... POLO(max)... QLPOS... POLO(mSum)... QWPOpS(mSum)... Mat2b... failed.
Finding a loop...  failed.