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Proof step 8 from proof validref-subset-01 (previous step)

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

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 7:
st ⊆ st0, st0[r -- _type] .type ≤ ty ⊦ r = jvmref, junkref(str, r, st), junkref(str, r, st0), st[r -- _type] .type ≤ ty

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ()]]