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Proof step 61 from proof inv-read-gblock-nodes (previous step)

# lpt0 = # avol, # lpt = # avol, # gndx = # lax, LEB_SIZE = n0 + # buf1, avol[m5] = mapped(buf1), m0 = m, m2 = LEB_SIZE, m < LEB_SIZE, m5 < # avol, abs-nodes(buf1, gndx, lax, true), awbuf-inv(avol, bleb), buf-ro-rw-mode(isbuf, bleb, lpt0, avol), bufs-log-only(bleb, log0, lpt0), lpt-free-unref(lpt), lpt-leb-size(lpt), lpt-ram-flash(lpt0, lpt, log0), read-gblock-inv(m5, m, ax, gndx0, ax1, gndx2, buf1, false), # buf1 ≤ LEB_SIZE, m + NODE_HEADER_SIZE ≤ LEB_SIZE, err = ESUCCESS → is-encoded(ndhd, subarray(buf1 + mkempbuf(n0), m, NODE_HEADER_SIZE)), err = ESUCCESS ∨ ⌊err⌋ ⊦ ⟪debug#("persistence: read_gblock_nodes could not decode header in LEB " + m5.toString + " at offset " + m0.toString)⟫ ( (err = ESUCCESS ∨ err = ENOENT ∨ ⌊err⌋ ) ∧ (err = ESUCCESS ∨ err = ENOENT → read-gblock-inv(m5, m0, ax, gndx0, ax1, gndx2, avol[m5].data, err = ENOENT)) ∧ (err ≠ ESUCCESS ⊃ 0;m2 - m0) < m2 - m), err = ESUCCESS, isempty(buf1 + mkempbuf(n0), m, NODE_HEADER_SIZE)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 62:
# gndx = # lax, # lpt = # avol, # lpt0 = # avol, LEB_SIZE = n0 + # buf1, avol[m5] = mapped(buf1), m5 < # avol, m < LEB_SIZE, abs-nodes(buf1, gndx, lax, true), awbuf-inv(avol, bleb), buf-ro-rw-mode(isbuf, bleb, lpt0, avol), bufs-log-only(bleb, log0, lpt0), lpt-free-unref(lpt), lpt-leb-size(lpt), lpt-ram-flash(lpt0, lpt, log0), read-gblock-inv(m5, m, ax, gndx0, ax1, gndx2, buf1, false), m + NODE_HEADER_SIZE ≤ LEB_SIZE, # buf1 ≤ LEB_SIZE, ⌊err⌋ , ¬ isempty(buf1 + mkempbuf(n0), m, NODE_HEADER_SIZE) ⊦ ⟪debug#("persistence: read_gblock_nodes could not decode header in LEB " + m5.toString + " at offset " + m.toString)⟫ (err = ENOENT → read-gblock-inv(m5, m, ax, gndx0, ax1, gndx2, avol[m5].data, true))

Rule argument

Additional information

Used simplifier rules: ⊦ n < m → 0 < m - n; (s)% ⊦ ⌊err⌋ → err ≠ ESUCCESS; (s)