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Proof step 28 from proof isobj-subset (previous step)

st[r -- _type] = typeval(ty), ty = mkclasstype(class), r ∈ st1, r ∈ st, r -- _type ∈ st1, st ⊆ st1, is_obj(r, class, st), is_typevalue(st[r -- _type]), r -- _type ∈ st ⊦ r = jvmref, is_obj(r, st1[r -- _type] .type .class, st1) ∧ is_classtype(st1[r -- _type] .type) ∧ is_typevalue(st1[r -- _type])

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 27:
st[r -- _type] = typeval(mkclasstype(class)), r -- _type ∈ st, is_obj(r, class, st), st ⊆ st1, r -- _type ∈ st1, r ∈ st, r ∈ st1 ⊦ r = jvmref, is_obj(r, st1[r -- _type] .type .class, st1) ∧ is_classtype(st1[r -- _type] .type) ∧ is_typevalue(st1[r -- _type])

Rule argument

[emptyarg]

Additional information

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