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Proof step 56 from proof prepost-read-log (previous step)

# buf2 = EB_PAGE_SIZE, LEB_SIZE = n0 + # buf0, LEB_SIZE = n1 + logoff0, LEB_SIZE = n2 + # avol[m5].data, avol[m5] = mapped(buf0), logoff0 < LEB_SIZE, m5 < # avol, ebm-vol-inv(avol), is-aligned(logoff0, EB_PAGE_SIZE), is-encoded(log, subarray(buf0, 0, logoff0)), is-encoded(log0, buf0), # buf0 ≤ LEB_SIZE, logoff0 ≤ # buf0, logoff0 + EB_PAGE_SIZE ≤ LEB_SIZE, # avol[m5].data ≤ LEB_SIZE ⊦ ⟪decode_ref_node#(EB_PAGE_SIZE, copy(avol[m5].data + mkempbuf(n2), logoff0, buf2, 0, EB_PAGE_SIZE); rnd; err0); if err0 = ESUCCESS then log := log + rnd.leb '; logoff := logoff0 + EB_PAGE_SIZE⟫ ( logoff ≤ LEB_SIZE ∧ is-aligned(logoff, EB_PAGE_SIZE) ∧ (err0 = ESUCCESS ∨ err0 = ENOENT ∨ ⌊err0⌋ ) ∧ avol[m5].mapped? ∧ (err0 = ESUCCESS → logoff ≤ # avol[m5].data ∧ is-encoded(log, subarray(avol[m5].data, 0, logoff))) ∧ (err0 = ENOENT → is-encoded(log, avol[m5].data)) ∧ LEB_SIZE < n1 + logoff), copy(buf0 + mkempbuf(n0), logoff0, buf2, 0, EB_PAGE_SIZE) = emptypage, n1 = 0

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Rule argument

Additional information

Used simplifier rules: eqs: ⊦ m = n + n0 ∧ m = n + n1 → n0 = n1; (forward) from specification nat-basic%c: ⊦ m + n = n + m; from specification nat-basic%a: ⊦ (m + n0) + n1 = m + n0 + n1; from specification nat-basic% ⊦ mapped(buf).data = buf; (s)%lf-01: ⊦ m < n ∧ n = n0 → m < n0; (forward) from specification nat-basic