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Proof step 43 from proof cyclic-def-simple (previous step)

validrefs(str, r ' + refs1, st[r -- _type] .type, st), is_array(str, r, st) ⊦ r = jvmref, ¬ r ∈ refs1 ∧ ¬ dups(refs1), ∃ refs0. dups(refs0) ∧ refs0 .first = r ∧ validrefs(str, refs0, mkclasstype(`java.lang.Object' .class), st)

User applied rule exists right

And obtained the following new goals

Proof step 42:
validrefs(str, r ' + refs1, st[r -- _type] .type, st), is_array(str, r, st) ⊦ r = jvmref, ¬ r ∈ refs1 ∧ ¬ dups(refs1), dups(r ' + refs1) ∧ (r ' + refs1) .first = r ∧ validrefs(str, r ' + refs1, mkclasstype(`java.lang.Object' .class), st)

Rule argument

[EXRARG : pos: right 3, [extquanttermlist: (r ' + refs1) abort:F , discard:T , computed:F ]]

Additional information

[[CONCRETESIMPRULES : ()], [EXTRATERMS : (r ' + refs1)]]