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Proof step 33 from proof inv-read-gnd (previous step)

# buf1 = # buf, # lpt = # avol, # lpt0 = # avol, avol[m4] = mapped(buf0), buf = mkbuf(m2), err = err0, n = m2, m4 < # avol, abs-node(subarray(buf0, m3, m2), gnd), 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), range=(buf1, n, buf, n, # buf - n), m3 + m2 ≤ # buf0, ⌊err0⌋ ∨ err0 = ESUCCESS ⊦ ⟪skip⟫ ((err = ESUCCESS ∨ ⌊err⌋ ) ∧ (err = ESUCCESS → gnd = gnd0)), err = ESUCCESS

Heuristic symbolic execution applied rule skip right

And closed the goal!

Rule argument

Additional information

Used simplifier rules: ⊦ # mkbuf(n) = n; (s)% ⊦ m - m = 0; (s)% ⊦ range=(buf, n0, buf0, n1, 0) ↔ n0 ≤ # buf ∧ n1 ≤ # buf0; (s)% ⊦ m ≤ m; (s)% ⊦ ⌊err⌋ → err ≠ ESUCCESS; (s)