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Proof step 10 from proof validref-union (previous step)

st[r -- _type] .type ≤ ty ⊦ r = jvmref, r = jvmref ∨ (st0 ∪ st)[r -- _type] .type ≤ ty ∧ ¬ junkref(str, r, st0 ∪ st), junkref(str, r, st)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 9:
st[r -- _type] .type ≤ ty ⊦ r = jvmref, junkref(str, r, st), (st0 ∪ st)[r -- _type] .type ≤ ty ∧ ¬ junkref(str, r, st0 ∪ st)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ()]]