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Proof step 8 from proof unchanged-validref (previous step)

unchanged(str, r, st, st1), st[r -- _type] .type ≤ ty ⊦ st1[r -- _type] .type ≤ ty, r = jvmref, junkref(str, r, st), st1[r -- _type] .type ≤ ty ∧ ¬ junkref(str, r, st1)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 7:
unchanged(str, r, st, st1), st[r -- _type] .type ≤ ty ⊦ r = jvmref, st1[r -- _type] .type ≤ ty, junkref(str, r, st)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ()]]