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Proof step 22 from proof isobj-union-01 (previous step)

r ≠ jvmref ∧ r -- _type ∈ st ∧ is_typevalue(st[r -- _type]) ∧ is_classtype(st[r -- _type] .type) ∧ is_obj(r, st[r -- _type] .type .class, st) ⊦ r ≠ jvmref ∧ r -- _type ∈ st0 ∪ st ∧ is_typevalue((st0 ∪ st)[r -- _type]) ∧ is_classtype((st0 ∪ st)[r -- _type] .type) ∧ is_obj(r, (st0 ∪ st)[r -- _type] .type .class, st0 ∪ st)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 21:
r -- _type ∈ st, is_typevalue(st[r -- _type]), is_classtype(st[r -- _type] .type), is_obj(r, st[r -- _type] .type .class, st), r ∈ st ⊦ r = jvmref, is_obj(r, st[r -- _type] .type .class, st0 ∪ st)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ([CSIMPFORWARD : ⊦ r -- sk ∈ st → r ∈ st], [CSIMPSEQ : ⊦ rk ∈ st0 → (st ∪ st0)[rk] = st0[rk]], [CSIMPSEQ : ⊦ rk ∈ st ∪ st0 ↔ rk ∈ st ∨ rk ∈ st0])]]