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Proof step 5 from proof inv-open (previous step)

err0 = err1, root.dir?, fids-cons(root, fs, ofh), pre-open(path, mode, err, user, root, fs, ofh) ⊦ ⟪err0 := err; if err0 = ESUCCESS then let fid = root[path].fid in choose n with ¬ n ∈ ofh in {ofh[n] := mkfh(fid, mode, 0); fd := n}⟫ fids-cons(root, fs, ofh)

Heuristic symbolic execution applied rule assign right

And obtained the following new goals

Proof step 6:
err0 = err1, root.dir?, fids-cons(root, fs, ofh), pre-open(path, mode, err, user, root, fs, ofh) ⊦ ⟪if err = ESUCCESS then let fid = root[path].fid in choose n with ¬ n ∈ ofh in {ofh[n] := mkfh(fid, mode, 0); fd := n}⟫ fids-cons(root, fs, ofh)

Proof step 5 from proof inv-open (previous step)

Heuristic symbolic execution applied rule assign right

And obtained the following new goals

Rule argument

Additional information