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Proof step 2 from proof inv-init (previous step)

⊦ ⟪fail_or_success#(; ; err); choose pebs with err = ESUCCESS → mtd-cons(pebs) in pebs0 := pebs⟫ ((err = ESUCCESS → mtd-cons(pebs0)) ∧ (err = ESUCCESS ∨ ⌊err⌋ ))

Heuristic unfold applied rule call right

And obtained the following new goals

Proof step 3:
⊦ ⟪choose err0 with ⌊err0⌋ ∨ err0 = ESUCCESS in err := err0; choose pebs with err = ESUCCESS → mtd-cons(pebs) in pebs0 := pebs⟫ ((err = ESUCCESS → mtd-cons(pebs0)) ∧ (err = ESUCCESS ∨ ⌊err⌋ ))

Rule argument

pos: right 1

Additional information

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