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Proof step 27 from proof inv-write (previous step)

v = default-volid, avols[default-volid][m2].mapped?, m2 < # avols[default-volid], ebm-cons(avols), is-aligned(n, EB_PAGE_SIZE), is-aligned(m1, EB_PAGE_SIZE), default-volid ∈ avols, n + n2 ≤ # buf, m1 + n ≤ LEB_SIZE, avols[default-volid][m2].mapped? → avols[default-volid][m2].fill ≤ m1, ∀ n1. ¬(n1 < n ∧ is-aligned(n1, EB_PAGE_SIZE)), ⌊err0⌋ ∨ err0 = ESUCCESS ⊦ [skip] (ebm-cons(avols) → default-volid ∈ avols), err0 = ESUCCESS

Heuristic symbolic execution applied rule skip right

And closed the goal!

Rule argument

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