| # x0 = # lax0, inv-flashsize(x1, lax1), ∀ n. n < # x0 → lax0[n].size = x0[n].flashsize ⊦ inv-flashsize(x0 + x1, lax0 + lax1) |
# x0 = # lax0, inv-flashsize(x1, lax1), ∀ n. n < # lax0 → lax0[n].size = x0[n].flashsize ⊦ inv-flashsize(x0 + x1, lax0 + lax1)