| # ar = n0 + n, n ≤ # ar ⊦ ar = subarray(ar, 0, n) + subarray(ar, n, n0) |
# ar = n0 + n ⊦ ar = subarray(ar, 0, n) + subarray(ar, n, n0)
Used simplifier rules: c: ⊦ m + n = n + m; from specification nat-basic%a: ⊦ (m + n0) + n1 = m + n0 + n1; from specification nat-basic% ⊦ m ≤ m + n; (s)