At: P causal switchable0 2 1 1 1
1. E: EventStruct
2. x: |E| List
3. y: |E| List
4. 
tr':|E| List. tr' 
x 
(x
tr'.(
ytr'.is-send(E)(y) & (y =msg=(E) x)))
5. a: |E|
6. y = filter(
b.
(b =msg=(E) a);x)
7. tr': |E| List
8. tr' y
tr' filter(b.(b =msg=(E) a);x)
By: RevHypSubst -3 0
Generated subgoals:None
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