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Proof step 11 from proof crash-neutral-link (previous step)

root.dir?, fids-cons(root, fs, ofh), posix-crash(root, fs, ofh, tree, fs0, ofh0) ⊦ ⟨psynced := ?⟩ (psynced ∧ posix-crash(root, fs, ofh, tree, fs0, ofh0)), ∃ err. pre-link(path, path', err, user, root, fs, ofh) ∧ ⟨err0 := err; if err0 = ESUCCESS then let fid = root[path].fid in root[path'] := fnode(fid); psynced := ?⟩ (psynced ∧ posix-crash(root, fs, ofh, tree, fs0, ofh0))

Heuristic symbolic execution applied rule assign right

And closed the goal!

Rule argument

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