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

root.dir?, fids-cons(root, fs, ofh), posix-crash(root, fs, ofh, tree, fs0, ofh0) ⊦ ⟨skip⟩ true, ∃ err. pre-readmeta(path, err, user, root, fs, ofh) ∧ ⟨err0 := err; if err0 = ESUCCESS then if root[path].dir? then md := root[path].meta, m0 := # root[path].subdirs + 2, m := # root[path].entries else let fid = root[path].fid in md := fs[fid].meta, m0 := count(fid, root.fids), m := # fs[fid].content⟩ true

Heuristic symbolic execution applied rule skip right

And closed the goal!

Rule argument

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