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Proof step 6 from proof validreflist-getarray (previous step)

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

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 3:
⊦ ¬ is_referencevalue(st[r -- i ']) ∧ is_reftype(ty) ∧ r ≠ jvmref ∧ 0 ≤ i ∧ i < st[r -- _length] .intval → ¬ validref(str, r, mkarraytype(ty), st)
Proof step 5:
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)

Rule argument

[emptyarg]

Additional information

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