dirs[n] = mkdir(m0, md, m1, m2, entries), ispath(p0, entries[name], m, dirs, files), name ∈ entries, n ∈ dirs,
∀ n, m, dirs, files. ispath(p0, n, m, dirs, files) → m ∈ files ∨ m ∈ dirs
⊦ m ∈ dirs, m ∈ files
Heuristic quantifier closing applied rule all left