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

# buf = EB_PAGE_SIZE, bleb ≠ nobuffer → bleb.leb < # avol ∧ wbuf-cons(mkwbuf(buf, m, m0), avol[bleb.leb], rofs) ⊦ ⟪wbuf_destroy_buf#(rofs; bleb; err)⟫ (bleb ≠ nobuffer → bleb.leb < # avol ∧ wbuf-cons(mkwbuf(buf, m, m0), avol[bleb.leb], rofs))

Heuristic unfold applied rule call right

And obtained the following new goals

Proof step 5:
# buf = EB_PAGE_SIZE, bleb ≠ nobuffer → bleb.leb < # avol ∧ wbuf-cons(mkwbuf(buf, m, m0), avol[bleb.leb], rofs) ⊦ ⟪if rofs then err := EROFS else {bleb := nobuffer; err := ESUCCESS}⟫ (bleb ≠ nobuffer → bleb.leb < # avol ∧ wbuf-cons(mkwbuf(buf, m, m0), avol[bleb.leb], rofs))

Rule argument

pos: right 1

Additional information

Used simplifier rules: destroy-buf: ⊦ ;