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Proof step 5 from proof crash-neutral-recovery (previous step)

asynced0, dirs0 = dirs1 \ orphans(dirs1, files1), files0 = files1 \ orphans(dirs1, files1), afs-cons(dirs1, files1) ⊦ ∃ dirs, files, asynced. ⟨fail#(; ; err)⟩ (asynced ∧ dirs0 = dirs \ orphans(dirs, files) ∧ files0 = files \ orphans(dirs, files)), ⟨asynced0 := true, err := ESUCCESS⟩ (asynced0 ∧ dirs0 = dirs1 \ orphans(dirs1, files1) ∧ files0 = files1 \ orphans(dirs1, files1))

Heuristic symbolic execution applied rule assign right

And closed the goal!

Rule argument

pos: right 2

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