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Proof step 28 from proof validref-subspec-samesubclasses-01 (previous step)

tdname+∃(str0, ty .jtelemtype .class), same-subclasses-contains(ty .jtelemtype .class, str, str0), validref(str0, r, ty, st) ⊦ r = jvmref ∨ st[r -- _type] .type ≤ ty ∧ ¬ junkref(str, r, st)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 27:
validref(str0, r, ty, st), same-subclasses-contains(ty .jtelemtype .class, str, str0), tdname+∃(str0, ty .jtelemtype .class) ⊦ r = jvmref, st[r -- _type] .type ≤ ty ∧ ¬ junkref(str, r, st)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ()]]