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Proof step 8 from proof junkref-addarray-newref (previous step)

newref(r0, st), junkrefs(str, r ' + refs0, (addarray(r0, ty0, vals, st)[r -- _type]) .type, addarray(r0, ty0, vals, st)) ⊦ r0 = jvmref, ∃ refs. refs ≠ [] ∧ refs .first = r ∧ junkrefs(str, refs, st[refs .first -- _type] .type, st)

User applied rule exists right

And obtained the following new goals

Proof step 7:
newref(r0, st), junkrefs(str, r ' + refs0, (addarray(r0, ty0, vals, st)[r -- _type]) .type, addarray(r0, ty0, vals, st)) ⊦ r0 = jvmref, r + refs0 ≠ [] ∧ (r + refs0) .first = r ∧ junkrefs(str, r + refs0, st[(r + refs0) .first -- _type] .type, st), ∃ refs. refs ≠ [] ∧ refs .first = r ∧ junkrefs(str, refs, st[refs .first -- _type] .type, st)

Rule argument

[EXRARG : pos: right 2, [extquanttermlist: (r + refs0) abort:F , discard:F , computed:F ]]

Additional information

[[CONCRETESIMPRULES : ()], [EXTRATERMS : (r + refs0)]]