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Proof step 13 from proof hasSharing-def-better (previous step)

st[r0 -- sks0] = refval(r0), fits(r0, sks0, st) ⊦ sks0 = [], r0 = jvmref, ∃ sks1, sks2. fits(r0, sks1, st) ∧ fits(r0, sks2, st) ∧ sks1 ≠ sks2 ∧ sks1 ≠ [] ∧ sks2 ≠ [] ∧ st[r0 -- sks1] .refval ≠ jvmref ∧ st[r0 -- sks1] = st[r0 -- sks2]

User applied rule exists right

And obtained the following new goals

Proof step 12:
st[r0 -- sks0] = refval(r0), fits(r0, sks0, st) ⊦ sks0 = [], r0 = jvmref, fits(r0, sks0, st) ∧ fits(r0, sks0 + sks0, st) ∧ sks0 ≠ sks0 + sks0 ∧ sks0 ≠ [] ∧ sks0 + sks0 ≠ [] ∧ st[r0 -- sks0] .refval ≠ jvmref ∧ st[r0 -- sks0] = st[r0 -- (sks0 + sks0)]

Rule argument

[EXRARG : pos: right 3, [extquanttermlist: (sks0, sks0 + sks0) abort:F , discard:T , computed:F ]]

Additional information

[[CONCRETESIMPRULES : ()], [EXTRATERMS : (sks0, sks0 + sks0)]]