MAYBE Problem: a(x1) -> x1 a(b(x1)) -> b(a(a(c(b(x1))))) b(x1) -> a(x1) c(c(x1)) -> x1 Proof: DP Processor: DPs: a#(b(x1)) -> c#(b(x1)) a#(b(x1)) -> a#(c(b(x1))) a#(b(x1)) -> a#(a(c(b(x1)))) a#(b(x1)) -> b#(a(a(c(b(x1))))) b#(x1) -> a#(x1) TRS: a(x1) -> x1 a(b(x1)) -> b(a(a(c(b(x1))))) b(x1) -> a(x1) c(c(x1)) -> x1 Open