At: switch normal exists 2 2 1 1 1 1 2
1. E: TaggedEventStruct
2. tr: |E| List
3. switch_inv(E)(tr)
4. No-dup-send(E)(tr)
5. L': |E| List
6. tr (swap adjacent[
R_ad_normal(tr)(x,y)]^*) L'
7. 
i:
(||L'||-1). R_ad_normal(tr)(L'[i],L'[(i+1)])
8. i: (||L'||-1)
9. is-send(E)(L'[i]) 
is-send(E)(L'[(i+1)])
(
x,y:||tr||.
x < y & is-send(E)(tr[x]) & is-send(E)(tr[y]) & (tr[x] =msg=(E) L'[(i+1)]) & (tr[y] =msg=(E) L'[i]))
loc(E)(L'[i]) = loc(E)(L'[(i+1)])
10. x: ||L'||
11. y: ||L'||
12. x < y
13. is-send(E)(L'[x])
14. is-send(E)(L'[y])
15. L'[x] =msg=(E) L'[(i+1)]
16. is-send(E)(L'[(i+1)])
17. L'[y] =msg=(E) L'[i]
18. is-send(E)(L'[i])
19. sublist(|E|;[L'[x]; L'[y]];L')
20. L' (swap adjacent[R_ad_normal(tr)(x,y)]^-1^*) tr
21. swap adjacent[R_ad_normal(tr)(x,y)]^-1^* preserves 
L.sublist(|E|;[L'[x]; L'[y]];L)
sublist(|E|;[L'[x]; L'[y]];tr)
By:
Unfold `preserved_by` -1
THEN
Reduce -1
THEN
InstHyp [L';tr] -1
Generated subgoals:None
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