Input TRS: 1: a__2nd(cons(X,cons(Y,Z))) -> mark(Y) 2: a__from(X) -> cons(mark(X),from(s(X))) 3: mark(2nd(X)) -> a__2nd(mark(X)) 4: mark(from(X)) -> a__from(mark(X)) 5: mark(cons(X1,X2)) -> cons(mark(X1),X2) 6: mark(s(X)) -> s(mark(X)) 7: a__2nd(X) -> 2nd(X) 8: a__from(X) -> from(X) Number of strict rules: 8 Direct Order(PosReal,>,Poly) ... failed. Freezing ... failed. Dependency Pairs: #1: #a__from(X) -> #mark(X) #2: #mark(s(X)) -> #mark(X) #3: #mark(cons(X1,X2)) -> #mark(X1) #4: #mark(2nd(X)) -> #a__2nd(mark(X)) #5: #mark(2nd(X)) -> #mark(X) #6: #a__2nd(cons(X,cons(Y,Z))) -> #mark(Y) #7: #mark(from(X)) -> #a__from(mark(X)) #8: #mark(from(X)) -> #mark(X) Number of SCCs: 1, DPs: 8, edges: 38 SCC { #1..8 } Removing DPs: Order(PosReal,>,Sum)... Order(PosReal,>,Max)... succeeded. s(x1) weight: x1 #a__from(x1) weight: (/ 1 4) + x1 a__from(x1) weight: (/ 3 4) + x1 2nd(x1) weight: (/ 3 4) + x1 a__2nd(x1) weight: (/ 3 4) + x1 #a__2nd(x1) weight: (/ 1 4) + x1 #mark(x1) weight: x1 from(x1) weight: (/ 3 4) + x1 mark(x1) weight: (/ 1 4) + x1 cons(x1,x2) weight: max{x2, (/ 1 4) + x1} Usable rules: { 1..8 } Removed DPs: #1 #3..8 Number of SCCs: 1, DPs: 1, edges: 1 SCC { #2 } Removing DPs: Order(PosReal,>,Sum)... succeeded. s(x1) weight: (/ 1 4) + x1 #a__from(x1) weight: (/ 1 4) a__from(x1) weight: (/ 1 2) 2nd(x1) weight: (/ 3 4) a__2nd(x1) weight: (/ 1 2) #a__2nd(x1) weight: 0 #mark(x1) weight: x1 from(x1) weight: (/ 3 4) mark(x1) weight: (/ 1 4) cons(x1,x2) weight: (/ 3 4) Usable rules: { } Removed DPs: #2 Number of SCCs: 0, DPs: 0, edges: 0 YES