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Proof step 3 from proof inv-destroy-buf (previous step)

# lpt = # avol, awbuf-inv(avol, bleb), synced(avol) ⊦ ⟪awbuf_destroy_buf#(adr, m, nx, avol, lpt, ns, isbuf; bleb; err)⟫ awbuf-inv(avol, bleb)

Heuristic unfold applied rule call right

And obtained the following new goals

Proof step 4:
# lpt = # avol, awbuf-inv(avol, bleb), synced(avol) ⊦ ⟪if synced(avol) then if isbuf then err := EROFS else bleb := nobuffer, err := ESUCCESS else abort⟫ awbuf-inv(avol, bleb)

Rule argument

pos: right 1

Additional information

Used simplifier rules: destroy-buf: ⊦ ;