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Proof step 1 from proof prepost-read-superblock (conclusion)

# avol ≠ 0, avol[0].mapped?, is-encoded(sb0, avol[0].data), ebm-vol-inv(avol) ⊦ ⟪persistence_io_read_superblock#(EB_PAGE_SIZE, LEB_SIZE, avol; sb; err)⟫ ((err = ESUCCESS ∨ ⌊err⌋ ) ∧ (err = ESUCCESS → sb = sb0))

System applied rule normalize

And obtained the following new goals

Proof step 2:
avol[0].mapped?, ebm-vol-inv(avol), is-encoded(sb0, avol[0].data) ⊦ ⟪persistence_io_read_superblock#(EB_PAGE_SIZE, LEB_SIZE, avol; sb; err)⟫ ((err = ESUCCESS ∨ ⌊err⌋ ) ∧ (err = ESUCCESS → sb = sb0)), # avol = 0

Proof step 1 from proof prepost-read-superblock (conclusion)

System applied rule normalize

And obtained the following new goals

Rule argument

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