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Proof step 3 from proof arrayref-02 (previous step)

∀ j. ¬ j < 0 ∧ ¬ i ≤ j → r -- j ' ∈ st[r0 -- sk, val], is_fskey(sk) ⊦ ∀ j. 0 ≤ j ∧ j < i → r -- j ' ∈ st

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 2:
j < i, is_fskey(sk), 0 ≤ j, 0 < i, ∀ j. ¬ j < 0 ∧ ¬ i ≤ j → r -- j ' ∈ st[r0 -- sk, val] ⊦ r -- j ' ∈ st

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ([CSIMPFORWARD : ⊦ i ≤ j ∧ 0 ≤ i → 0 ≤ j], [CSIMPFORWARD : ⊦ i < j ∧ 0 ≤ i → 0 < j])]]