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Proof step 7 from proof crash-neutral-commit (previous step)

# lpt3 = # avol, # lpt2 = # avol, awbuf-inv(avol, bleb), synced(avol), synced(avol0), avol0 ↓ avol ⊦ ⟨choose err0 with ⌊err0⌋ ∨ err0 = ESUCCESS in err := err0; nx := nx0; ns := ns3; m := m3; lpt := lpt2; adr := adr3; if err = ESUCCESS then {adr := adr0; m := m0; nx := []; lpt := lpt3; ns := ns0} else isbuf := true; ns0 := ?⟩ (adr3 = adr ∧ m3 = m ∧ nx0 = nx ∧ lpt2 = lpt ∧ ns3 = ns)

Heuristic symbolic execution applied rule choose right

And obtained the following new goals

Proof step 8:
# lpt2 = # avol, # lpt3 = # avol, awbuf-inv(avol, bleb), synced(avol0), synced(avol), avol0 ↓ avol ⊦ ∃ err0. (⌊err0⌋ ∨ err0 = ESUCCESS) ∧ ⟨err := err0; nx := nx0; ns := ns3; m := m3; lpt := lpt2; adr := adr3; if err = ESUCCESS then {adr := adr0; m := m0; nx := []; lpt := lpt3; ns := ns0} else isbuf := true; ns0 := ?⟩ (adr3 = adr ∧ m3 = m ∧ nx0 = nx ∧ lpt2 = lpt ∧ ns3 = ns)

Proof step 7 from proof crash-neutral-commit (previous step)

Heuristic symbolic execution applied rule choose right

And obtained the following new goals

Rule argument

Additional information