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Proof step 5 from proof validrefnotnull-array-02 (conclusion)

⊦ validrefnotnull(str, r, mkarraytype(ty), st) → ¬ st[r -- _length] .intval < 0

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 1:
⊦ validrefnotnull(str, r, ty, st) → r ≠ jvmref
Proof step 4:
validrefnotnull(str, r, mkarraytype(ty), st), st[r -- _length] .intval < 0 ⊦ r = jvmref

Rule argument

[emptyarg]

Additional information

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