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Proof step 7 from proof validref-nopath-superset (previous step)

validrefnotnull(str, r, st[r -- _type] .type, st), st ⊆ st0, newref(r, st), is_valid_ref(str, r, st0) ⊦ r = jvmref

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 3:
⊦ newref(r, st) → ¬ is_valid_ref(str, r, st)
Proof step 6:
¬ newref(r, st0), validrefnotnull(str, r, st[r -- _type] .type, st), st ⊆ st0, newref(r, st), is_valid_ref(str, r, st0) ⊦ r = jvmref

Rule argument

[speclemmaarg: ,newref(r, st) → ¬ is_valid_ref(str, r, st) ,[st, r, str] → [st0, r, str] ,F ,addfuns , ,is_valid_ref-new ]

Additional information

[[CONCRETESIMPRULES : ()], [EXTRATERMS : (st0, r, str)]]