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Proof step 7 from proof inv-recover (previous step)

avols = avols0, ebm-cons(avols1), ebm-cons(avols0), default-volid ∈ avols1, avols1 ⊆ avols0, ⌊err0⌋ ∨ err0 = ESUCCESS ⊦ ⟪err := err0; if err ≠ ESUCCESS then avols := ?; v := default-volid⟫ (err = ESUCCESS → default-volid ∈ avols ∧ v = default-volid ∧ ebm-cons(avols))

Heuristic symbolic execution applied rule assign right

And obtained the following new goals

Proof step 8:
avols = avols0, err = err0, ebm-cons(avols0), ebm-cons(avols1), default-volid ∈ avols1, avols1 ⊆ avols0, ⌊err0⌋ ∨ err0 = ESUCCESS ⊦ ⟪if err ≠ ESUCCESS then avols := ?; v := default-volid⟫ (err = ESUCCESS → default-volid ∈ avols ∧ v = default-volid ∧ ebm-cons(avols))

Proof step 7 from proof inv-recover (previous step)

Heuristic symbolic execution applied rule assign right

And obtained the following new goals

Rule argument

Additional information