Level: Lib Thy Top: 1 2
Hypotheses:- Alph :

- S : ActionSet(Alph)
- s : S.car
- Fin(Alph)
- Fin(S.car)
LL:(S.car
S.car List) List
BL:S.car List.
t:S.car. mem_f(S.car;t;BL) 

(
i:
||LL||. LL[i].1 = t
mem_f(S.car;s;LL[i].2))
Conclusion:
BL:S.car List.
t:S.car. mem_f(S.car;t;BL) 

(
a:Alph. S.act a t = s)
Applied Tactic: D (-3) THEN D (-3) THEN D (-2) THEN D (-2)
Generated subgoals:1.
BL:S.car List.
t:S.car. mem_f(S.car;t;BL) 

(
a:Alph. S.act a t = s)