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Proof step 17 from proof validref-forward-array (conclusion)

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

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 16:
validref(str, r, mkarraytype(ty), st0), i < st0[r -- _length] .intval, 0 ≤ i, 0 < st0[r -- _length] .intval ⊦ r = jvmref, validref(str, st0[r -- i '] .refval, ty, st0)

Rule argument

[emptyarg]

Additional information

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