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Proof step 4 from proof junkref-is-junk (previous step)

⊦ r = jvmref, is_valid_ref(str, r, st), r ' ≠ [] ∧ r ' .first = r ∧ junkrefs(str, r ', st[r ' .first -- _type] .type, st)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 3:
⊦ r = jvmref, is_valid_ref(str, r, st), junkrefs(str, r ', st[r -- _type] .type, st)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ r ' .first = r], [CSIMPSEQ : ⊦ r ' ≠ []])]]