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Proof step 11 from proof encode-contract (previous step)

buf0 = buf, n + size-aligned(a, ENCODED_ELEM_ALIGNMENT) ≤ # buf, n + encoding-size(a) ≤ # buf ⊦ ∀ buf, n0, err. (err = ESUCCESS ∨ ⌊err⌋ ) ∧ # buf = # buf0 ∧ subarray(buf, 0, n) = subarray(buf0, 0, n) ∧ subarray(buf, n + encoding-size(a), # buf - n + encoding-size(a)) = subarray(buf0, n + encoding-size(a), # buf - n + encoding-size(a)) ∧ (err = ESUCCESS → is-encoded(a, subarray(buf, n, encoding-size(a))) ∧ n0 = encoding-size(a)) → ⟪if err = ESUCCESS then n0 := align↑(n0, ENCODED_ELEM_ALIGNMENT)⟫ ( (err = ESUCCESS ∨ ⌊err⌋ ) ∧ ( err = ESUCCESS → is-encoded-aligned(a, subarray(buf, n, size-aligned(a, ENCODED_ELEM_ALIGNMENT))) ∧ n0 = size-aligned(a, ENCODED_ELEM_ALIGNMENT)))

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 12:
# buf1 = # buf, subarray(buf1, 0, n) = subarray(buf, 0, n), subarray(buf1, n + encoding-size(a), # buf - n + encoding-size(a)) = subarray(buf, n + encoding-size(a), # buf - n + encoding-size(a)), n + encoding-size(a) ≤ # buf, n + size-aligned(a, ENCODED_ELEM_ALIGNMENT) ≤ # buf, err = ESUCCESS → is-encoded(a, subarray(buf1, n, encoding-size(a))) ∧ n0 = encoding-size(a), err = ESUCCESS ∨ ⌊err⌋ ⊦ ⟪if err = ESUCCESS then n0 := align↑(n0, ENCODED_ELEM_ALIGNMENT)⟫ ( (err = ESUCCESS ∨ ⌊err⌋ ) ∧ ( err = ESUCCESS → is-encoded-aligned(a, subarray(buf1, n, size-aligned(a, ENCODED_ELEM_ALIGNMENT))) ∧ n0 = size-aligned(a, ENCODED_ELEM_ALIGNMENT)))

Proof step 11 from proof encode-contract (previous step)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Rule argument

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