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Proof step 8 from proof inv-format (previous step)

err = err0, err = ESUCCESS, ubi-io-initial(apebs0), ⌊err0⌋ ∨ err0 = ESUCCESS ⊦ ⟪apebs := apebs0⟫ (err = ESUCCESS → ubi-io-inv(apebs))

Heuristic symbolic execution applied rule assign right

And closed the goal!

Rule argument

Additional information

Used simplifier rules: ⊦ ubi-io-initial(apebs) → ubi-io-inv(apebs); (s)