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Proof step 9 from proof pathex-one (previous step)

r = jvmref ∨ is_valid_ref(str, r, st) ⊦ ∃ refs. refs ≠ [] ∧ refs .first = refs .last ∧ refs .last = r ∧ validrefs(str, refs, mkclasstype(`java.lang.Object' .class), st)

User applied rule exists right

And obtained the following new goals

Proof step 8:
r = jvmref ∨ is_valid_ref(str, r, st) ⊦ r ' ≠ [] ∧ r ' .first = r ' .last ∧ r ' .last = r ∧ validrefs(str, r ', mkclasstype(`java.lang.Object' .class), st)

Rule argument

[EXRARG : pos: right 1, [extquanttermlist: (r ')abort:F, discard:T, computed:F]]

Additional information

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