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Proof step 5 from proof validref-isarrayref (previous step)

st[r -- _type] .type = mkarraytype(ty0), i ≤ st[r -- _length] .intval, validref(str, r, mkarraytype(ty), st), is_valid_ref(str, r, st), is_arraytype(st[r -- _type] .type), ty0 ≤ ty ⊦ r = jvmref, is_arrayref(r, i, st)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 4:
st[r -- _type] .type = mkarraytype(ty0), ty0 ≤ ty, is_valid_ref(str, r, st), validref(str, r, mkarraytype(ty), st), i ≤ st[r -- _length] .intval ⊦ r = jvmref, is_arrayref(r, i, st)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ is_arraytype(mkarraytype(ty))])]]