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Proof step 4 from proof inv-create-volume (previous step)

ebm-cons(avols) ⊦ ⟪if ¬ v ∈ avols then {fail_or_success#(; ; err); if err = ESUCCESS then avols[v] := fill(mkabstractvolume(n), erased)} else abort⟫ ebm-cons(avols), v ∈ avols

Heuristic symbolic execution applied rule if positive right

And obtained the following new goals

Proof step 5:
ebm-cons(avols) ⊦ ⟪fail_or_success#(; ; err); if err = ESUCCESS then avols[v] := fill(mkabstractvolume(n), erased)⟫ ebm-cons(avols), v ∈ avols

Rule argument

pos: right 1

Proof step 4 from proof inv-create-volume (previous step)

Heuristic symbolic execution applied rule if positive right

And obtained the following new goals

Rule argument

Additional information