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