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Proof step 9 from proof isobj-isobj (previous step)

is_obj(r, class, st) ⊦ 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)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 2:
⊦ ¬ is_obj(jvmref, class, st)
Proof step 3:
⊦ ¬ r -- _type ∈ st → ¬ is_obj(r, class, st)
Proof step 8:
is_obj(r, class, st), r -- _type ∈ st, r ∈ st ⊦ r = jvmref, is_obj(r, st[r -- _type] .type .class, st) ∧ is_classtype(st[r -- _type] .type) ∧ is_typevalue(st[r -- _type])

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ([CSIMPFORWARD : ⊦ r -- sk ∈ st → r ∈ st])]]