At: P causal switchable0 4 2 1
1. E: EventStruct
2. x: |E| List
3. y: |E| List
4. 
i:
||x||. 
j:||x||. j
i & is-send(E)(x[j]) & (x[j] =msg=(E) x[i])
5. x@0: |E|
6. is-send(E)(x@0)
7. y = (x @ [x@0])
8. i: ||y||
9. ||y|| = ||x||+1
10. 
i < ||x||
is-send(E)(y[i])
By:
HypSubstList -4 0
THEN
RWO "select_append_back" 0
THEN
Subst' (i-||x|| = 0) 0
THEN
Reduce 0
Generated subgoals:None
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