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Proof step 21 from proof hasSharing-def-better (previous step)

st[r0 -- sks] = refval(r0), fits(r0, sks, st) ⊦ sks = [], r0 = jvmref, fits(r0, sks, st) ∧ fits(r0, sks + sks, st) ∧ sks ≠ sks + sks ∧ sks ≠ [] ∧ sks + sks ≠ [] ∧ st[r0 -- sks] .refval ≠ jvmref ∧ st[r0 -- sks] = st[r0 -- (sks + sks)]

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 20:
st[r0 -- sks] = refval(r0), fits(r0, sks, st) ⊦ r0 = jvmref, sks = [], fits(r0, sks + sks, st) ∧ refval(r0) = st[r0 -- (sks + sks)]

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ refval(r) .refval = r], [CSIMPSEQ : ⊦ ¬ sks + sks0 ≠ [] ↔ sks = [] ∧ sks0 = []], [CSIMPSEQ : ⊦ (sks + sks0) + sks1 = sks + sks0 + sks1], [CSIMPSEQ : ⊦ sks = sks + sks0 ↔ sks0 = []])]]