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Proof step 6 from proof crash-neutral-isbad (previous step)

n < # apebs, ubi-io-inv(apebs) ⊦ ⟨choose err0 with ⌊err0⌋ ∨ err0 = ESUCCESS in err := err0; if err = ESUCCESS then isbad := apebs[n].bad else isbad := ?⟩ true

Heuristic symbolic execution applied rule choose right

And obtained the following new goals

Proof step 7:
n < # apebs, ubi-io-inv(apebs) ⊦ ∃ err0. (⌊err0⌋ ∨ err0 = ESUCCESS) ∧ ⟨err := err0; if err = ESUCCESS then isbad := apebs[n].bad else isbad := ?⟩ true

Proof step 6 from proof crash-neutral-isbad (previous step)

Heuristic symbolic execution applied rule choose right

And obtained the following new goals

Rule argument

Additional information