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Proof step 13 from proof compatarray-isarray (previous step)

st[r -- _type] = typeval(ty0), st[r -- _length] = intval(i), ty0 = mkarraytype(ty), r -- _type ∈ st, is_typevalue(st[r -- _type]), r ∈ st, is_arrayref(r, i, st), r -- _length ∈ st, 0 ≤ i, ∀ j. ¬ j < 0 ∧ ¬ i ≤ j → compat(str, st[r -- j '], ty, st) ⊦ r = jvmref, okarray(r, ty, st)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 12:
st[r -- _length] = intval(i), st[r -- _type] = typeval(mkarraytype(ty)), 0 ≤ i, r -- _length ∈ st, is_arrayref(r, i, st), r ∈ st, r -- _type ∈ st, ∀ j. ¬ j < 0 ∧ ¬ i ≤ j → compat(str, st[r -- j '], ty, st) ⊦ r = jvmref, okarray(r, ty, st)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ is_typevalue(typeval(ty))])]]