Nuprl - Pf P_causal_switchable0 6 1 1 2

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At: P causal switchable0 6 1 1 2

1. E: EventStruct
2. x: |E| List
3. y: |E| List
4. i:||x||. j:||x||. ji & is-send(E)(x[j]) & (x[j] =msg=(E) x[i])
5. i1: (||x||-1)
6. (x[i1] =msg=(E) x[(i1+1)])
7. is-send(E)(x[i1]) & is-send(E)(x[(i1+1)]) is-send(E)(x[i1]) & is-send(E)(x[(i1+1)])
8. y = swap(x;i1;i1+1)
9. i: ||y||
10. ||swap(x;i1;i1+1)|| = ||x||
11. ||y|| = ||x||
12. ||swap(y;i1;i1+1)|| = ||y||
13. (i1, i1+1) ||x||||x||
14. j: ||x||
15. j(i1, i1+1)(i)
16. is-send(E)(x[j])
17. x[j] =msg=(E) x[((i1, i1+1)(i))]

is-send(E)(y[((i1, i1+1)(j))])

By: RWO "swap_select < " 0

Generated subgoal:

1 is-send(E)(swap(y;i1;i1+1)[j])

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