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Proof step 6 from proof inv-format (previous step)

err = err0, ⌊err0⌋ ∨ err0 = ESUCCESS ⊦ ⟪if err = ESUCCESS then choose apebs0 with ubi-io-initial(apebs0) in apebs := apebs0 else apebs := ?⟫ (err = ESUCCESS → ubi-io-inv(apebs))

Heuristic conditional right split applied rule if right

And obtained the following new goals

Rule argument

pos: right 1

Additional information