NO Problem 1: (VAR v_NonEmpty:S) (RULES b -> c f -> f g(b) -> c ) Problem 1: Dependency Pairs Processor: -> Pairs: F -> F -> Rules: b -> c f -> f g(b) -> c Problem 1: Infinite Processor: -> Pairs: F -> F -> Rules: b -> c f -> f g(b) -> c -> Pairs in cycle: F -> F The problem is infinite.