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Proof step 17 from proof inv-seek (previous step)

err = ESUCCESS, err0 = err1, f = fs[fh.fid], fh = ofh[fd], whence = SEEK_END, root.dir?, fids-cons(root, fs, ofh), pre-seek(fd, n, whence, err, user, root, fs, ofh), fd ∈ ofh, fh.fid ∈ fs ⊦ ⟪ofh[fd].pos := # f.content + n⟫ fids-cons(root, fs, ofh), whence = SEEK_CUR

Heuristic symbolic execution applied rule assign right

And obtained the following new goals

Proof step 18:
err = ESUCCESS, err0 = err1, f = fs[fh.fid], fh = ofh[fd], whence = SEEK_END, root.dir?, fids-cons(root, fs, ofh), pre-seek(fd, n, whence, err, user, root, fs, ofh), fh.fid ∈ fs, fd ∈ ofh ⊦ whence = SEEK_CUR, fids-cons(root, fs, ofh[fd, ofh[fd].pos:= (# f.content + n)])

Proof step 17 from proof inv-seek (previous step)

Heuristic symbolic execution applied rule assign right

And obtained the following new goals

Rule argument

Additional information