2. i : Id
3. (
loc.
(once(loc;a;i))) 
Dsys
4. D' : Dsys
5.
loc.(once(loc;a;i)) 
D'
6. w : World
7. p : FairFifo
8. PossibleWorld(D';w)
9. @i: ma-single-pre-init1("done";
;false
;a;Unit;x,v.
x) Dsys
10. vartype(i;"done")
r
11.
e:E. loc(e) = i 
first(e) ("done" when e) = false
12.
e:E. loc(e) = i kind(e) = locl(a) (valtype(e) r Unit)
13.
e:E. loc(e) = i kind(e) = locl(a) ("done" when e)
14. e : E
15. loc(e) = i
16.
v:Unit. ("done" after e)
17.
e@i.("done" after e) = ("done" when e) kind(e) = locl(a)
18.
("done" after e)
19. ev : E
20. ev
e
21.
("done" after ev) = ("done" when ev)
kind(ev) = locl(a)
