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Proof step 27 from proof refine-truncate (previous step)

root[path].dir? ↔ ino1 ∈ dirs, isdir ↔ false, err = ESUCCESS, err1 = ESUCCESS, err2 = err1, ino = ino1, inode = getinode(ino, dirs, files), mode = MODE_W, root.dir?, dom of < ino0, abs(root, ROOT_INO)(dirs), afs-cons(dirs, files), fids-cons(root, abs-files(files), abs-of(of)), ispath(path, ROOT_INO, ino1, dirs, files), of-cons(of, dirs, files), pre-iget(ino, dirs, files), px-parent(user, path, ROOT_INO, dirs, files), psynced → asynced ⊦ [err := (inode.directory ⊃ EISDIR;ENOTDIR); err1 := err; if err1 = ESUCCESS then afs_check_commit#(dirs, files; err1; asynced); pageno := 0; if err1 = ESUCCESS then pageno := inode.size / VFS_PAGE_SIZE; fs := abs-files(files); if err1 = ESUCCESS then {buf-opt := none; afs_truncate#(n, pageno; buf-opt, inode, isdir0, err1, dirs, files, asynced)}] ( of-cons(of, dirs, files) ∧ afs-cons(dirs, files) → ⟨posix_truncate#(path, n, user, root, abs-of(of); err0, fs; psynced)⟩ (fs = abs-files(files) ∧ abs(root, ROOT_INO)(dirs) ∧ (psynced → asynced) ∧ err1 = err0)), inode.directory ↔ isdir

Heuristic symbolic execution applied rule assign right

And obtained the following new goals

Rule argument

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