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Proof step 6 from proof validrefnotnull-is-junk (previous step)

r ≠ jvmref ∧ validref(str, r, ty, st), ¬ st[r -- _type] .type ≤ ty ∧ ¬ type∃(str, st[r -- _type] .type) ∨ ¬ is_valid_ref(str, r, st) ⊦ r = jvmref

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 5:
validref(str, r, ty, st), ¬ st[r -- _type] .type ≤ ty ∧ ¬ type∃(str, st[r -- _type] .type) ∨ ¬ is_valid_ref(str, r, st) ⊦ r = jvmref

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ()]]