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Proof step 27 from proof inv-write (previous step)

err0 = err1, n0 = n, root.dir?, fids-cons(root, fs, ofh), pre-write(fd, buf, n0, err, user, root, fs, ofh), n ≤ # buf ⊦ ⟪n0 := ?; psynced := ?⟫ fids-cons(root, fs, ofh), err = ESUCCESS

Heuristic symbolic execution applied rule assign right

And obtained the following new goals

Proof step 28:
err0 = err1, n1 = n, root.dir?, fids-cons(root, fs, ofh), pre-write(fd, buf, n1, err, user, root, fs, ofh), n ≤ # buf ⊦ ⟪psynced := ?⟫ fids-cons(root, fs, ofh), err = ESUCCESS

Proof step 27 from proof inv-write (previous step)

Heuristic symbolic execution applied rule assign right

And obtained the following new goals

Rule argument

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