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Proof step 9 from proof decode-contract (previous step)

ENCODED_ELEM_SIZE ≤ # buf, ENCODED_ELEM_SIZE ≤ EB_PAGE_SIZE, EB_PAGE_SIZE ≤ # buf ⊦ ∀ a, err. is-encoded-nonempty(a, subarray(buf, 0, ENCODED_ELEM_SIZE)) → err = ESUCCESS → is-encoded-pagesize(a, subarray(buf, 0, EB_PAGE_SIZE))

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 10:
is-encoded-nonempty(a, subarray(buf, 0, ENCODED_ELEM_SIZE)), ENCODED_ELEM_SIZE ≤ # buf, ENCODED_ELEM_SIZE ≤ EB_PAGE_SIZE, EB_PAGE_SIZE ≤ # buf ⊦ is-encoded-pagesize(a, subarray(buf, 0, EB_PAGE_SIZE))

Rule argument

Additional information

Used simplifier rules: ⊦ # subarray(buf, m, n) = n; (s)%is-encoded-size: ⊦ is-encoded-nonempty(a, buf) → # buf = ENCODED_ELEM_SIZE; (forward) from specification encoding-fixed-size-nonempty