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Proof step 7 from proof isarray-length-05 (conclusion)

⊦ st[r -- (sk1 ' + sk0 ' + sk ' + _length ')] .intval < 0 → ¬ is_array(st[r -- (sk1 ' + sk0 ' + sk ')] .refval, st)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 6:
is_array(st[r -- (sk1 ' + sk0 ' + sk ')] .refval, st), st[r -- (sk1 ' + sk0 ' + sk ' + _length ')] .intval < 0 ⊦

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ([CSIMPFORWARD : ⊦ j < i ∧ i ≤ 0 → j < 0], [CSIMPSEQ : ⊦ (sks + sks0) + sks1 = sks + sks0 + sks1])]]