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Proof step 11 from proof junkref-addobj (previous step)

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

User applied rule exists right

And obtained the following new goals

Proof step 10:
newref(r0, st), junkrefs(str, r ' + refs0, (addobj(r0, class, fis, st)[r -- _type]) .type, addobj(r0, class, fis, st)) ⊦ r0 = jvmref, r ' + refs0 ≠ [] ∧ (r ' + refs0) .first = r ∧ junkrefs(str, r ' + refs0, st[r -- _type] .type, st)

Rule argument

[EXRARG : pos: right 2, [extquanttermlist: (r ' + refs0) abort:F , discard:T , computed:F ]]

Additional information

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