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Proof step 63 from proof junkref-update-equiv (previous step)

validFields(r0, fis, st), is_valid_ref(str, r0, st) ⊦ junkref(str, r, update(r0, fis, st)) ↔ junkref(str, r, st), path∃(str, r, r0, st), _type ∈ fis

User applied rule case distinction

And obtained the following new goals

Proof step 2:
junkref(str, r, update(r0, fis, st)), validFields(r0, fis, st), is_valid_ref(str, r0, st) ⊦ junkref(str, r, st), path∃(str, r, r0, st), _type ∈ fis
Proof step 62:
junkref(str, r, st), validFields(r0, fis, st), is_valid_ref(str, r0, st) ⊦ junkref(str, r, update(r0, fis, st)), path∃(str, r, r0, st), _type ∈ fis

Rule argument

[CASEDARG : pos: right 1, ()]

Additional information

[[CONCRETESIMPRULES : ()]]