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Proof step 3 from proof unchNorec-validrefs-pathex (previous step)

validrefs(str, r1 ' + refs0, ty, st), is_valid_ref(str, r1, st), st[r1 -- _type] .type ≤ ty, ∀ r. r = r1 ∨ r ∈ refs0 → unchangedNorec(r, st, st0) ⊦ r1 = jvmref, is_valid_ref(str, r1, st0)

Heuristic quantifier closing applied rule all left

And obtained the following new goals

Proof step 2:
⊦ unchangedNorec(r, st, st0) ∧ is_valid_ref(str, r, st) → (¬ is_valid_ref(str, r, st0) ↔ false)

Rule argument

[EXRARG : pos: left 4, [QUANTTERMLIST : (r1)]]

Additional information

[[CONCRETESIMPRULES : ()], [EXTRATERMS : (r1)]]