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Proof step 5 from proof inv-add-log-leb (previous step)

# lpt = # avol, m = m2, m1 = m3, rofs, ebm-vol-inv(avol), wbuf-cons(bleb, wbuf, avol, rofs), ¬ rofs → bleb = buffered(m3) ∨ (bleb = nobuffer ∨ wbuf.nbytes = 0) ∧ m3 < # avol ∧ avol[m3].mapped? ∧ m0 = # avol[m3].data ⊦ ⟪err := EROFS⟫ wbuf-cons(bleb, wbuf, avol, rofs)

Heuristic symbolic execution applied rule assign right

And closed the goal!

Rule argument

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