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Proof step 5 from proof crash-neutral-map (previous step)

m < # avols[v], ebm-cons(avols0), ebm-cons(avols), v ∈ avols, avols ⊆ avols0 ⊦ ⟨fail_or_success#(; ; err); if err = ESUCCESS then avols[v][m] := mapped(emptyleb, 0)⟩ (avols ⊆ avols0), avols[v][m].mapped?

Heuristic weak unfold applied rule call right

And obtained the following new goals

Proof step 6:
m < # avols[v], ebm-cons(avols), ebm-cons(avols0), v ∈ avols, avols ⊆ avols0 ⊦ ⟨choose err0 with ⌊err0⌋ ∨ err0 = ESUCCESS in err := err0; if err = ESUCCESS then avols[v][m] := mapped(emptyleb, 0)⟩ (avols ⊆ avols0), avols[v][m].mapped?

Rule argument

pos: right 1

Additional information

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