At: P causal iff 2 1
1. E: EventStruct
2. tr: |E| List
3.
tr':|E| List.
tr'
tr 
(
x:|E|.
(
i:
. i < ||tr'|| & x = tr'[i]) 
(
y:|E|. (
i:
. i < ||tr'|| & y = tr'[i]) & is-send(E)(y) & (y =msg=(E) x)))
4. i:
||tr||
firstn(i+1;tr)
tr
By:
RWO "firstn_is_iseg" 0
THEN
InstConcl [i+1]
Generated subgoals:None
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