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Proof step 17 from proof refine-sync (previous step)

root.dir?, dom of < ino, abs(root, ROOT_INO)(dirs), afs-cons(dirs, files), fids-cons(root, abs-files(files), abs-of(of)), of-cons(of, dirs, files), psynced → asynced, ⌊err1⌋ ∨ err1 = ESUCCESS ⊦ ⟨psynced := err1 = ESUCCESS⟩ ((psynced → err1 = ESUCCESS) ∧ err1 = err1), ∃ err0. (⌊err0⌋ ∨ err0 = ESUCCESS) ∧ ⟨err := err0; psynced := err = ESUCCESS⟩ ((psynced → err = ESUCCESS) ∧ err1 = err)

Heuristic symbolic execution applied rule assign right

And closed the goal!

Rule argument

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