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Proof step 10 from proof refine-isbad (previous step)

m < # apebs, abs(pebs, apebs), mtd-cons(pebs), ubi-io-inv(apebs) ⊦ ⟪choose err0 with ⌊err0⌋ ∨ err0 = ESUCCESS in err := err0; if err = ESUCCESS then isbad := pebs[m].bad else isbad := ?⟫ ⟨aubi_io_isbad#(m, apebs; ; isbad0, err0)⟩ ((isbad ↔ isbad0) ∧ err = err0)

Heuristic symbolic execution applied rule choose right

And obtained the following new goals

Proof step 11:
m < # apebs, abs(pebs, apebs), mtd-cons(pebs), ubi-io-inv(apebs), ⌊err0⌋ ∨ err0 = ESUCCESS ⊦ ⟪err := err0; if err = ESUCCESS then isbad := pebs[m].bad else isbad := ?⟫ ⟨aubi_io_isbad#(m, apebs; ; isbad0, err1)⟩ ((isbad ↔ isbad0) ∧ err = err1)
Proof step 43:
m < # apebs, abs(pebs, apebs), mtd-cons(pebs), ubi-io-inv(apebs) ⊦ ∃ err0. ⌊err0⌋ ∨ err0 = ESUCCESS

Proof step 10 from proof refine-isbad (previous step)

Heuristic symbolic execution applied rule choose right

And obtained the following new goals

Rule argument

Additional information