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Proof step 15 from proof validrefs-lastelem (previous step)

ty = mkclasstype(class1), st[r0 -- _type] = typeval(mkclasstype(class0)), st[r0 -- mkfs(class, ty0, fieldvar) '] = refval(r1), mkfs(class, ty0, fieldvar) ' ∈ instfields(class0), is_obj(r0, class0, st), r0 -- _type ∈ st, r0 ∈ st, validrefs(str, r1 ', ty0, st), is_obj(str, r0, st), is_classtype(ty), class0 ≤ class1 ⊦ r0 = jvmref, is_reftype(ty0)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 14:
st[r0 -- _type] = typeval(mkclasstype(class0)), st[r0 -- mkfs(class, ty0, fieldvar) '] = refval(r1), mkfs(class, ty0, fieldvar) ' ∈ instfields(class0), is_obj(r0, class0, st), r0 -- _type ∈ st, r0 ∈ st, validrefs(str, r1 ', ty0, st), is_obj(str, r0, st), class0 ≤ class1 ⊦ r0 = jvmref, is_reftype(ty0)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ is_classtype(mkclasstype(class))])]]