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Proof step 72 from proof refine-readmeta (previous step)

root[path] = dnode(md1, sdt), dirs[m] = mkdir(m0, md, m1, m3, entries0), m0 = # entries0, m1 = # links(m, dirs), m3 = # subdirs(m, dirs), ((m => mkdir(# entries, md1, # links(m, dirs), m2, entries) * abs(sdt, entries) * abs|(root, ROOT_INO, path, m)))(dirs), root.dir?, dom of < ino6, fids-cons(root, abs-files(files), abs-of(of)), ispath(path, ROOT_INO, m, dirs, files), of-cons(of, dirs, files), pr(user, md1), px-parent(user, path, ROOT_INO, dirs, files), path ∈ root, ROOT_INO ∈ dirs, # links(m, dirs) ≤ 1, psynced → asynced, m ≠ ROOT_INO ∧ links(m, dirs) = ∅ → entries0 = ∅, ∀ name. name ∈ entries0 → entries0[name] ∈ dirs ∨ entries0[name] ∈ files, ∀ ino. (ino ∈ dirs ∧ ino ≠ ROOT_INO ∧ links(ino, dirs) = ∅ → dirs[ino].entries = ∅) ∧ ( ino ∈ dirs → ¬ ino ∈ files ∧ dirs[ino].nlink = # links(ino, dirs) ∧ dirs[ino].nlink ≤ 1 ∧ dirs[ino].size = # dirs[ino].entries ∧ dirs[ino].nsubdirs = # subdirs(ino, dirs)) ∧ (ino ∈ files → ¬ ino ∈ dirs ∧ files[ino].nlink = # links(ino, dirs)) ∧ (∀ name. ino ∈ dirs ∧ name ∈ dirs[ino].entries → dirs[ino].entries[name] ∈ dirs ∨ dirs[ino].entries[name] ∈ files) ∧ (∀ n. ino ∈ files ∧ n ∈ files[ino].content → # files[ino].content[n] = VFS_PAGE_SIZE) ⊦ m2 = # dnode(md1, sdt).subdirs, m ∈ files

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 73:
root[path] = dnode(md1, sdt), ((m => mkdir(# entries0, md1, # links(m, dirs), # subdirs(m, dirs), entries0) * abs(sdt, entries0) * abs|(root, ROOT_INO, path, m)) )(dirs), root.dir?, dom of < ino6, fids-cons(root, abs-files(files), abs-of(of)), ispath(path, ROOT_INO, m, dirs, files), of-cons(of, dirs, files), pr(user, md1), px-parent(user, path, ROOT_INO, dirs, files), path ∈ root, ROOT_INO ∈ dirs, # links(m, dirs) ≤ 1, psynced → asynced, m ≠ ROOT_INO ∧ links(m, dirs) = ∅ → entries0 = ∅, ∀ name. name ∈ entries0 → entries0[name] ∈ dirs ∨ entries0[name] ∈ files, ∀ ino. (ino ∈ dirs ∧ ino ≠ ROOT_INO ∧ links(ino, dirs) = ∅ → dirs[ino].entries = ∅) ∧ ( ino ∈ dirs → ¬ ino ∈ files ∧ dirs[ino].nlink = # links(ino, dirs) ∧ dirs[ino].nlink ≤ 1 ∧ dirs[ino].size = # dirs[ino].entries ∧ dirs[ino].nsubdirs = # subdirs(ino, dirs)) ∧ (ino ∈ files → ¬ ino ∈ dirs ∧ files[ino].nlink = # links(ino, dirs)) ∧ (∀ name. ino ∈ dirs ∧ name ∈ dirs[ino].entries → dirs[ino].entries[name] ∈ dirs ∨ dirs[ino].entries[name] ∈ files) ∧ (∀ n. ino ∈ files ∧ n ∈ files[ino].content → # files[ino].content[n] = VFS_PAGE_SIZE) ⊦ # subdirs(m, dirs) = # dnode(md1, sdt).subdirs, m ∈ files

Rule argument

Additional information

Used simplifier rules: ⊦ mkdir(m, md, m0, m1, entries) = mkdir(m2, md0, m3, m4, entries0) ↔ m = m2 ∧ md = md0 ∧ m0 = m3 ∧ m1 = m4 ∧ entries = entries0; (ws)% ⊦ ((ino => ad * D))(dirs) → (dirs[ino] = ad0 ↔ ad = ad0); (s)%sep-com: ⊦ D * D0 = D0 * D; from specification heap-sep[dir-heap]%sep-ass: ⊦ (D * D0) * D1 = D * D0 * D1; from specification heap-sep[dir-heap]