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Proof step 5 from proof isarray-length-05 (previous step)

st[r -- (sk1 ' + sk0 ' + sk ')] = refval(r0) ∧ is_referencevalue(st[r -- (sk1 ' + sk0 ' + sk ')]), is_array(r0, st), st[r -- (sk1 ' + sk0 ' + sk ' + _length ')] .intval < 0 ⊦

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 4:
st[r -- (sk1 ' + sk0 ' + sk ')] = refval(r0), st[r -- (sk1 ' + sk0 ' + sk ' + _length ')] .intval < 0, is_array(r0, st) ⊦

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ is_referencevalue(refval(r))])]]