At: nd comp extend wf 1 2 1 2 1 1 2
1. Alph: Type
2. St: Type
3. C: {C:{l:((St
Alph*)*)| ||l|| > 0 }|
i:
(||C||-1). ||2of(C[i])|| > 0 }
4. a: Alph
5. q: St
6. i: 
7. 0
i < ||map(
c. < 1of(c),a.2of(c) > ;C)||+1-1
||2of((
c. < 1of(c),a.2of(c) > )(C[i]))|| > 0
By: Reduce 0
Generated subgoal:1 | ||2of(C[i])||+1 > 0 |
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