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Proof step 22 from proof initialization (previous step)

⌊err1⌋ ⊦ ⟨fail_or_success#(; ; err); if err = ESUCCESS then avols := ∅ else avols := ?⟩ (avols1 = avols ∧ err1 = err)

Heuristic weak unfold applied rule call right

And obtained the following new goals

Proof step 23:
⌊err1⌋ ⊦ ⟨choose err0 with ⌊err0⌋ ∨ err0 = ESUCCESS in err := err0; if err = ESUCCESS then avols := ∅ else avols := ?⟩ (avols1 = avols ∧ err1 = err)

Rule argument

pos: right 1

Additional information

Used simplifier rules: fail_or_success#(; ; ERR) {choose ERR0 with ⌊ERR0⌋ ∨ ERR0 = ESUCCESS in ERR := ERR0};