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Proof step 40 from proof initialization (previous step)

⌊err0⌋ ⊦ ⟨choose err0 with ⌊err0⌋ ∨ err0 = ESUCCESS in err := err0; if err = ESUCCESS then avol := fill(mkavolume(m), unmapped) else avol := ?⟩ (avol1 = avol ∧ err0 = err)

Heuristic symbolic execution applied rule choose right

And obtained the following new goals

Proof step 41:
⌊err1⌋ ⊦ ∃ err0. (⌊err0⌋ ∨ err0 = ESUCCESS) ∧ ⟨err := err0; if err = ESUCCESS then avol := fill(mkavolume(m), unmapped) else avol := ?⟩ (avol1 = avol ∧ err1 = err)

Proof step 40 from proof initialization (previous step)

Heuristic symbolic execution applied rule choose right

And obtained the following new goals

Rule argument

Additional information