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Proof step 14 from proof isobj-union-01 (previous step)

st[r -- _type] = typeval(mkclasstype(class)), r -- _type ∈ st, goodfieldsandtypes(r, instfields(class), st), r ∈ st ⊦ r = jvmref, r ≠ jvmref ∧ (r -- _type) × typeval(mkclasstype(class)) ∈ st0 ∪ st ∧ goodfieldsandtypes(r, instfields(class), st0 ∪ st)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ rk ∈ st0 → (st ∪ st0)[rk] = st0[rk]], [CSIMPSEQ : ⊦ rk ∈ st ∪ st0 ↔ rk ∈ st ∨ rk ∈ st0], [CSIMPSEQ : ⊦ rk × val ∈ st ↔ ¬ ¬ (rk ∈ st ∧ st[rk] = val)])]]