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Proof step 7 from proof junkrefs-levelsubset (previous step)

¬ (is_obj(str0, r, st) ∧ st[r -- _type] .type ≤ ty), is_obj(str, r, st), junkrefs(str0, r ' + acc, ty, st), level⊆(str, str0), st[r -- _type] .type ≤ ty, ∀ str, str0, ty, st. level⊆(str, str0) ∧ junkrefs(str0, acc, ty, st) → junkrefs(str, acc, ty, st) ⊦ r = jvmref, junkrefs(str, r ' + acc, ty, st)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 6:
⊦ is_obj(str, r, st) ∧ level⊆(str, str0) → (¬ is_obj(str0, r, st) ↔ false)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ()]]