⊦ m ≤ n → dist(m, n) = n - m
m | n, m | n0 ⊦ m | dist(n, n0), n ≤ n0
Used simplifier rules: divi-sub: ⊦ m | n ∧ n0 ≤ n → (m | n - n0 ↔ m | n0); Used terms: n0, n