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Proof step 20 from proof prepost-read-superblock (previous step)

avol[0] = mapped(buf1), # avol ≠ 0, ebm-vol-inv(avol), is-encoded(sb0, buf1), # buf1 ≤ LEB_SIZE, LEB_SIZE ≤ # buf1 + (LEB_SIZE - # buf1) ⊦ [decode_superblock#(0, copy(avol[0].data + mkempbuf(LEB_SIZE - # avol[0].data), 0, mkbuf(LEB_SIZE), 0, LEB_SIZE), EB_PAGE_SIZE; sb, m; err)] ( is-encoded(sb, subarray(avol[0].data + mkempbuf(LEB_SIZE - # avol[0].data), 0, encoding-size(sb, EB_PAGE_SIZE))) ∧ encoding-size(sb, EB_PAGE_SIZE) ≤ # avol[0].data + (LEB_SIZE - # avol[0].data) ∧ m = encoding-size(sb, EB_PAGE_SIZE) → err = ESUCCESS → sb = sb0)

User applied rule skip call

And obtained the following new goals

Rule argument

pos: right 1

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