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Proof step 27 from proof inv-sync (
previous step
)
buf0 = buf, is-aligned(# buf, 2 * NODE_HEADER_SIZE), # buf ≥ 2 * NODE_HEADER_SIZE ⊦ ⟪persistence_encode_padding_node#(; buf; err)⟫ ((err = ESUCCESS ∨ ⌊err⌋ ) ∧ # buf = # buf0 ∧ (err = ESUCCESS → abs-padding(buf)))
Lemma
prepost-encode-padding