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Proof step 8 from proof is_obj-no-refval (previous step)

st[r -- _type] = typeval(mkclasstype(class)), r ∈ st, r ≠ jvmref ∧ (r -- _type) × typeval(mkclasstype(class)) ∈ st ∧ goodfieldsandtypes(r, instfields(class), st), r -- _type ∈ st, class+∃(str, class), mkfs(str2 .class, mkclasstype(str0 .class), str1 .field) ' ∈ instfields(class) ⊦ r = jvmref, is_abstract(class), is_referencevalue(st[r -- mkfs(str2 .class, mkclasstype(str0 .class), str1 .field) '])

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 7:
st[r -- _type] = typeval(mkclasstype(class)), r ∈ st, goodfieldsandtypes(r, instfields(class), st), r -- _type ∈ st, class+∃(str, class), mkfs(str2 .class, mkclasstype(str0 .class), str1 .field) ' ∈ instfields(class) ⊦ r = jvmref, is_abstract(class), is_referencevalue(st[r -- mkfs(str2 .class, mkclasstype(str0 .class), str1 .field) '])

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ rk × val ∈ st ↔ rk ∈ st ∧ st[rk] = val])]]