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Proof step 4 from proof inv-read-buf (previous step)

# lpt = # avol, avol[m3] = mapped(buf1), buf0 = buf, m = m2, m1 = m3, m3 < # avol, awbuf-inv(avol, bleb), n ≤ # buf, m0 + n ≤ LEB_SIZE ⊦ ⟪if m1 < # avol ∧ n ≤ # buf0 ∧ m0 + n ≤ LEB_SIZE ∧ avol[m1].mapped? then {fail_or_success#(; ; err); if err = ESUCCESS then buf0 := copy(avol[m1].data + mkempbuf(LEB_SIZE - # avol[m1].data), m0, buf0, 0, n) else choose buf with # buf = # buf0 ∧ range=(buf, n, buf0, n, # buf0 - n) in buf0 := buf} else abort⟫ true

Heuristic symbolic execution applied rule if positive right

And obtained the following new goals

Proof step 5:
# lpt = # avol, avol[m3] = mapped(buf1), buf0 = buf, m = m2, m1 = m3, m3 < # avol, awbuf-inv(avol, bleb), m0 + n ≤ LEB_SIZE, n ≤ # buf ⊦ ⟪fail_or_success#(; ; err); if err = ESUCCESS then buf0 := copy(avol[m1].data + mkempbuf(LEB_SIZE - # avol[m1].data), m0, buf0, 0, n) else choose buf with # buf = # buf0 ∧ range=(buf, n, buf0, n, # buf0 - n) in buf0 := buf⟫ true

Rule argument

pos: right 1

Additional information

Used simplifier rules: ⊦ mapped(buf).mapped?; (s)