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Proof step 6 from proof inv-read (previous step)

dom of < ino, afs-cons(dirs, files), of-cons(of, dirs, files), n ≤ # buf ⊦ ⟪err := ESUCCESS; if ¬ fd ∈ of then err := EBADFD else if of[fd].mode ≠ MODE_R ∧ of[fd].mode ≠ MODE_RW then err := EBADFD else choose inode with true in {afs_iget#(of[fd].ino, dirs, files, asynced; inode, err); if err = ESUCCESS then if inode.directory then err := EISDIR else let ino1 = of[fd].pos, ino0 = of[fd].pos + n, ino = 0 in if ino1 ≤ inode.size then {let isdir = false in vfs_read_loop#(ino1, ino0, inode, isdir, dirs, files, asynced; buf, ino, err); if ino ≠ 0 then err := ESUCCESS; of[fd].pos := of[fd].pos + ino; n := ino} else n := 0}⟫ (of-cons(of, dirs, files) ∧ dom of < ino)

Heuristic symbolic execution applied rule assign right

And obtained the following new goals

Proof step 7:
err = ESUCCESS, dom of < ino, afs-cons(dirs, files), of-cons(of, dirs, files), n ≤ # buf ⊦ ⟪if ¬ fd ∈ of then err := EBADFD else if of[fd].mode ≠ MODE_R ∧ of[fd].mode ≠ MODE_RW then err := EBADFD else choose inode with true in {afs_iget#(of[fd].ino, dirs, files, asynced; inode, err); if err = ESUCCESS then if inode.directory then err := EISDIR else let ino1 = of[fd].pos, ino0 = of[fd].pos + n, ino = 0 in if ino1 ≤ inode.size then {let isdir = false in vfs_read_loop#(ino1, ino0, inode, isdir, dirs, files, asynced; buf, ino, err); if ino ≠ 0 then err := ESUCCESS; of[fd].pos := of[fd].pos + ino; n := ino} else n := 0}⟫ (of-cons(of, dirs, files) ∧ dom of < ino)

Proof step 6 from proof inv-read (previous step)

Heuristic symbolic execution applied rule assign right

And obtained the following new goals

Rule argument

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