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Proof step 9 from proof is_arrayref-02 (previous step)

⊦ (∀ j. 0 ≤ j ∧ j < i → r -- j ' ∈ st[_mode, val]) ↔ is_arrayref(r, i, st)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 8:
⊦ (∀ j. ¬ j < 0 ∧ ¬ i ≤ j → r -- j ' ∈ st[_mode, val]) ↔ is_arrayref(r, i, st)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ ¬ i < j ↔ j ≤ i], [CSIMPSEQ : ⊦ ¬ i ≤ j ↔ j < i])]]