Input TRS: 1: from(X) -> cons(X,from(s(X))) 2: first(0(),Z) -> nil() 3: first(s(X),cons(Y,Z)) -> cons(Y,first(X,Z)) 4: sel(0(),cons(X,Z)) -> X 5: sel(s(X),cons(Y,Z)) -> sel(X,Z) Number of strict rules: 5 Direct Order(PosReal,>,Poly) ... failed. Freezing ... failed. Dependency Pairs: #1: #sel(s(X),cons(Y,Z)) -> #sel(X,Z) #2: #first(s(X),cons(Y,Z)) -> #first(X,Z) #3: #from(X) -> #from(s(X)) Number of SCCs: 3, DPs: 3, edges: 3 SCC { #3 } Removing DPs: Order(PosReal,>,Sum)... Order(PosReal,>,Max)... QLPOpS... Order(PosReal,>,MaxSum)... QWPOpS(PosReal,>,MaxSum)... Order(PosReal,>,Sum-Sum; PosReal,≥,Sum-Sum)... Order(PosReal,>,Sum-Sum; NegReal,≥,Sum)... Order(PosReal,>,MaxSum-Sum; NegReal,≥,Sum)... failed. Removing edges: failed. Finding a loop... found. #from(X) -#3-> #from(s(X)) --->* #from(s(X)) Looping with: [ X := s(X); ] NO