Input TRS: 1: app(nil(),k) -> k 2: app(l,nil()) -> l 3: app(cons(x,l),k) -> cons(x,app(l,k)) 4: sum(cons(x,nil())) -> cons(x,nil()) 5: sum(cons(x,cons(y,l))) -> sum(cons(plus(x,y),l)) 6: sum(app(l,cons(x,cons(y,k)))) -> sum(app(l,sum(cons(x,cons(y,k))))) 7: plus(|0|(),y) -> y 8: plus(s(x),y) -> s(plus(x,y)) Number of strict rules: 8 Direct Order(PosReal,>,Poly) ... removes: 1 5 7 2 |0|() weight: 0 s(x1) weight: (/ 1 4) + x1 sum(x1) weight: x1 nil() weight: 0 plus(x1,x2) weight: (/ 117929 4) + x1 + x2 cons(x1,x2) weight: (/ 58965 2) + x1 + x2 app(x1,x2) weight: (/ 63685 4) + x1 + 2 * x2 Number of strict rules: 4 Direct Order(PosReal,>,Poly) ... removes: 3 |0|() weight: 0 s(x1) weight: (/ 1 16) + x1 sum(x1) weight: x1 nil() weight: 0 plus(x1,x2) weight: (/ 1 16) + x1 + x2 cons(x1,x2) weight: (/ 1 16) + x1 + x2 app(x1,x2) weight: (/ 856737 16) + 2 * x1 + 2 * x2 Number of strict rules: 3 Direct Order(PosReal,>,Poly) ... removes: 8 |0|() weight: 0 s(x1) weight: (/ 1 16) + x1 sum(x1) weight: x1 nil() weight: 0 plus(x1,x2) weight: (/ 1 8) + 2 * x1 + x2 cons(x1,x2) weight: (/ 1 16) + x1 + x2 app(x1,x2) weight: (/ 9441 16) + 2 * x1 + 2 * x2 Number of strict rules: 2 Direct Order(PosReal,>,Poly) ... failed. Freezing sum 4: sum❆1_cons(x,nil()) -> cons(x,nil()) 6: sum❆1_app(l,cons(x,cons(y,k))) -> sum❆1_app(l,sum❆1_cons(x,cons(y,k))) 9: sum(cons(_1,_2)) ->= sum❆1_cons(_1,_2) 10: sum(app(_1,_2)) ->= sum❆1_app(_1,_2) Number of strict rules: 2 Direct Order(PosReal,>,Poly) ... removes: 4 10 9 6 |0|() weight: 0 sum❆1_app(x1,x2) weight: (/ 1 16) + x1 + x2 s(x1) weight: x1 sum❆1_cons(x1,x2) weight: (/ 3 16) + x1 + x2 sum(x1) weight: 2 * x1 nil() weight: 0 plus(x1,x2) weight: x1 + x2 cons(x1,x2) weight: (/ 1 8) + x1 + 2 * x2 app(x1,x2) weight: (/ 1 16) + x1 + x2 Number of strict rules: 0 YES