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Proof step 21 from proof exists-twonew (previous step)

jvmref < r, r < r0, jvmref < r0, ∀ r. ∃ r0. r < r0, ∀ r0. r0 ∈ st → r0 < r ⊦ ∃ r, r0. r ≠ r0 ∧ newref(r, st) ∧ newref(r0, st)

User applied rule exists right

And obtained the following new goals

Proof step 20:
jvmref < r, r < r0, jvmref < r0, ∀ r. ∃ r0. r < r0, ∀ r0. r0 ∈ st → r0 < r ⊦ r ≠ r0 ∧ newref(r, st) ∧ newref(r0, st)

Rule argument

[EXRARG : pos: right 1, [extquanttermlist: (r, r0)abort:F, discard:T, computed:F]]

Additional information

[[CONCRETESIMPRULES : ()], [EXTRATERMS : (r, r0)]]