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Proof step 5 from proof validreflist-getarray (previous step)

validref(str, r, mkarraytype(ty), st), is_reftype(ty), i < st[r -- _length] .intval, is_referencevalue(st[r -- i ']), 0 ≤ i, 0 < st[r -- _length] .intval ⊦ r = jvmref, validref(str, st[r -- i '] .refval, ty, st)

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 4:
⊦ r ≠ jvmref ∧ ¬ validref(str, st0[r -- i '] .refval, ty, st0) ∧ 0 ≤ i ∧ i < st0[r -- _length] .intval → ¬ validref(str, r, mkarraytype(ty), st0)

Rule argument

[crewrite-arg: validref-forward-array-01 , F , [r, str, st0, i, ty] → [r, str, st, i, ty] ]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ ¬ i ≤ j ↔ j < i], [CSIMPSEQ : ⊦ i ≤ j → (¬ ¬ j < i ↔ false)], [CSIMPSEQ : ⊦ ¬ i < j ↔ j ≤ i], [CSIMPSEQ : ⊦ i < j → (¬ ¬ j ≤ i ↔ false)])], [EXTRATERMS : (r, str, st, i, ty)]]