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Proof step 23 from proof isarray-isarrayref (conclusion)

⊦ ¬ is_arrayref(r, i, st) ∧ i ≤ st[r -- _length] .intval ∧ r ≠ jvmref → ¬ is_array(r, st)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 22:
i ≤ st[r -- _length] .intval, is_array(r, st) ⊦ r = jvmref, is_arrayref(r, i, st)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ()]]