Termination Proof Script

Consider the TRS R consisting of the rewrite rules
1:    active(from(X))  → mark(cons(X,from(s(X))))
2:    active(sel(0,cons(X,Y)))  → mark(X)
3:    active(sel(s(X),cons(Y,Z)))  → mark(sel(X,Z))
4:    active(from(X))  → from(active(X))
5:    active(cons(X1,X2))  → cons(active(X1),X2)
6:    active(s(X))  → s(active(X))
7:    active(sel(X1,X2))  → sel(active(X1),X2)
8:    active(sel(X1,X2))  → sel(X1,active(X2))
9:    from(mark(X))  → mark(from(X))
10:    cons(mark(X1),X2)  → mark(cons(X1,X2))
11:    s(mark(X))  → mark(s(X))
12:    sel(mark(X1),X2)  → mark(sel(X1,X2))
13:    sel(X1,mark(X2))  → mark(sel(X1,X2))
14:    proper(from(X))  → from(proper(X))
15:    proper(cons(X1,X2))  → cons(proper(X1),proper(X2))
16:    proper(s(X))  → s(proper(X))
17:    proper(sel(X1,X2))  → sel(proper(X1),proper(X2))
18:    proper(0)  → ok(0)
19:    from(ok(X))  → ok(from(X))
20:    cons(ok(X1),ok(X2))  → ok(cons(X1,X2))
21:    s(ok(X))  → ok(s(X))
22:    sel(ok(X1),ok(X2))  → ok(sel(X1,X2))
23:    top(mark(X))  → top(proper(X))
24:    top(ok(X))  → top(active(X))
There are 37 dependency pairs:
25:    ACTIVE(from(X))  → CONS(X,from(s(X)))
26:    ACTIVE(from(X))  → FROM(s(X))
27:    ACTIVE(from(X))  → S(X)
28:    ACTIVE(sel(s(X),cons(Y,Z)))  → SEL(X,Z)
29:    ACTIVE(from(X))  → FROM(active(X))
30:    ACTIVE(from(X))  → ACTIVE(X)
31:    ACTIVE(cons(X1,X2))  → CONS(active(X1),X2)
32:    ACTIVE(cons(X1,X2))  → ACTIVE(X1)
33:    ACTIVE(s(X))  → S(active(X))
34:    ACTIVE(s(X))  → ACTIVE(X)
35:    ACTIVE(sel(X1,X2))  → SEL(active(X1),X2)
36:    ACTIVE(sel(X1,X2))  → ACTIVE(X1)
37:    ACTIVE(sel(X1,X2))  → SEL(X1,active(X2))
38:    ACTIVE(sel(X1,X2))  → ACTIVE(X2)
39:    FROM(mark(X))  → FROM(X)
40:    CONS(mark(X1),X2)  → CONS(X1,X2)
41:    S(mark(X))  → S(X)
42:    SEL(mark(X1),X2)  → SEL(X1,X2)
43:    SEL(X1,mark(X2))  → SEL(X1,X2)
44:    PROPER(from(X))  → FROM(proper(X))
45:    PROPER(from(X))  → PROPER(X)
46:    PROPER(cons(X1,X2))  → CONS(proper(X1),proper(X2))
47:    PROPER(cons(X1,X2))  → PROPER(X1)
48:    PROPER(cons(X1,X2))  → PROPER(X2)
49:    PROPER(s(X))  → S(proper(X))
50:    PROPER(s(X))  → PROPER(X)
51:    PROPER(sel(X1,X2))  → SEL(proper(X1),proper(X2))
52:    PROPER(sel(X1,X2))  → PROPER(X1)
53:    PROPER(sel(X1,X2))  → PROPER(X2)
54:    FROM(ok(X))  → FROM(X)
55:    CONS(ok(X1),ok(X2))  → CONS(X1,X2)
56:    S(ok(X))  → S(X)
57:    SEL(ok(X1),ok(X2))  → SEL(X1,X2)
58:    TOP(mark(X))  → TOP(proper(X))
59:    TOP(mark(X))  → PROPER(X)
60:    TOP(ok(X))  → TOP(active(X))
61:    TOP(ok(X))  → ACTIVE(X)
The approximated dependency graph contains 7 SCCs: {40,55}, {39,54}, {41,56}, {42,43,57}, {45,47,48,50,52,53}, {30,32,34,36,38} and {58,60}.
Tyrolean Termination Tool  (4.53 seconds)   ---  May 3, 2006