MAYBE

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

Proof:
 DP Processor:
  DPs:
   a#(a(x1)) -> c#(x1)
   a#(a(x1)) -> c#(c(x1))
   a#(a(x1)) -> a#(b(c(c(x1))))
   c#(b(x1)) -> a#(x1)
  TRS:
   a(x1) -> x1
   a(a(x1)) -> b(a(b(c(c(x1)))))
   c(x1) -> x1
   c(b(x1)) -> a(x1)
  TDG Processor:
   DPs:
    a#(a(x1)) -> c#(x1)
    a#(a(x1)) -> c#(c(x1))
    a#(a(x1)) -> a#(b(c(c(x1))))
    c#(b(x1)) -> a#(x1)
   TRS:
    a(x1) -> x1
    a(a(x1)) -> b(a(b(c(c(x1)))))
    c(x1) -> x1
    c(b(x1)) -> a(x1)
   graph:
    c#(b(x1)) -> a#(x1) -> a#(a(x1)) -> a#(b(c(c(x1))))
    c#(b(x1)) -> a#(x1) -> a#(a(x1)) -> c#(c(x1))
    c#(b(x1)) -> a#(x1) -> a#(a(x1)) -> c#(x1)
    a#(a(x1)) -> c#(c(x1)) -> c#(b(x1)) -> a#(x1)
    a#(a(x1)) -> c#(x1) -> c#(b(x1)) -> a#(x1)
    a#(a(x1)) -> a#(b(c(c(x1)))) -> a#(a(x1)) -> a#(b(c(c(x1))))
    a#(a(x1)) -> a#(b(c(c(x1)))) -> a#(a(x1)) -> c#(c(x1))
    a#(a(x1)) -> a#(b(c(c(x1)))) -> a#(a(x1)) -> c#(x1)
   EDG Processor:
    DPs:
     a#(a(x1)) -> c#(x1)
     a#(a(x1)) -> c#(c(x1))
     a#(a(x1)) -> a#(b(c(c(x1))))
     c#(b(x1)) -> a#(x1)
    TRS:
     a(x1) -> x1
     a(a(x1)) -> b(a(b(c(c(x1)))))
     c(x1) -> x1
     c(b(x1)) -> a(x1)
    graph:
     c#(b(x1)) -> a#(x1) -> a#(a(x1)) -> c#(x1)
     c#(b(x1)) -> a#(x1) -> a#(a(x1)) -> c#(c(x1))
     c#(b(x1)) -> a#(x1) -> a#(a(x1)) -> a#(b(c(c(x1))))
     a#(a(x1)) -> c#(c(x1)) -> c#(b(x1)) -> a#(x1)
     a#(a(x1)) -> c#(x1) -> c#(b(x1)) -> a#(x1)
    SCC Processor:
     #sccs: 1
     #rules: 3
     #arcs: 5/16
     DPs:
      c#(b(x1)) -> a#(x1)
      a#(a(x1)) -> c#(c(x1))
      a#(a(x1)) -> c#(x1)
     TRS:
      a(x1) -> x1
      a(a(x1)) -> b(a(b(c(c(x1)))))
      c(x1) -> x1
      c(b(x1)) -> a(x1)
     Open