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Proof step 23 from proof eq-io-readdir (previous step)

⟨choose err0 with ⌊err0⌋ in err := err0⟩ (err = err0), dirs1[m] = mkdir(m3, md0, m4, m5, entries), m ∈ dirs1 ⊦ ∃ strings. ⟨strings0 := strings; fail#(; ; err)⟩ (strings0 = strings1 ∧ err = err0), dom entries = strings1 ∧ ESUCCESS = err0

Heuristic symbolic execution applied rule choose left

And obtained the following new goals

Proof step 24:
⟨err := err0⟩ (err = err1), dirs1[m] = mkdir(m3, md0, m4, m5, entries), m ∈ dirs1, ⌊err0⌋ ⊦ ∃ strings. ⟨strings0 := strings; fail#(; ; err)⟩ (strings0 = strings1 ∧ err = err1), dom entries = strings1 ∧ ESUCCESS = err1

Proof step 23 from proof eq-io-readdir (previous step)

Heuristic symbolic execution applied rule choose left

And obtained the following new goals

Rule argument

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