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Proof step 1 from proof encode-contract (conclusion)

n + size-aligned(a, ENCODED_ELEM_ALIGNMENT) ≤ # buf, buf0 = buf ⊦ ⟪encode_aligned#(a, n, ENCODED_ELEM_ALIGNMENT; buf, n0; err)⟫ ( (err = ESUCCESS ∨ ⌊err⌋ ) ∧ # buf = # buf0 ∧ ( err = ESUCCESS → is-encoded-aligned(a, subarray(buf, n, size-aligned(a, ENCODED_ELEM_ALIGNMENT))) ∧ n0 = size-aligned(a, ENCODED_ELEM_ALIGNMENT)))

System applied rule normalize

And obtained the following new goals

Proof step 2:
buf0 = buf, n + size-aligned(a, ENCODED_ELEM_ALIGNMENT) ≤ # buf ⊦ ⟪encode_aligned#(a, n, ENCODED_ELEM_ALIGNMENT; buf, n0; err)⟫ ( (err = ESUCCESS ∨ ⌊err⌋ ) ∧ # buf = # buf0 ∧ ( err = ESUCCESS → is-encoded-aligned(a, subarray(buf, n, size-aligned(a, ENCODED_ELEM_ALIGNMENT))) ∧ n0 = size-aligned(a, ENCODED_ELEM_ALIGNMENT)))

Proof step 1 from proof encode-contract (conclusion)

System applied rule normalize

And obtained the following new goals

Rule argument

Additional information