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Proof step 64 from proof exvalidrefs-nodups (previous step)

st[r -- mkfs(class0, ty, fieldvar) '] = refval(r0), st[r0 -- _type] .type ≤ ty, is_classtype(st[r -- _type] .type), is_obj(str, r, st), mkfs(class0, ty, fieldvar) ' ∈ instfields(class), ty ≤ mkclasstype(class), st[r -- _type] .type ≤ ty, st[r -- _type] .type ≤ mkclasstype(class), is_obj(str, r0, st), validrefs(str, r0 ' + refs0, st[r0 -- _type] .type, st -- r), st[r0 -- _type] .type ≤ mkclasstype(class), ∀ r, str, st0. # st0 .refs < # st .refs → ( ¬ junkref(str, r, st0) ∧ ¬ cyclic(str, r, st0) ∧ is_obj(str, r, st0) ∧ r ≠ jvmref ∧ (∃ fs, class. fs ' ∈ instfields(class) ∧ fs .type ≤ mkclasstype(class) ∧ st0[r -- _type] .type ≤ fs .type) → (∃ refs. validrefs(str, refs, st0[r -- _type] .type, st0) ∧ refs ≠ [] ∧ ¬ dups(refs) ∧ refs .first = r ∧ refs .last = jvmref)) ⊦ r0 = jvmref, r = jvmref, r = r0, junkref(str, r0, st), ∃ refs. validrefs(str, refs, st[refs .first -- _type] .type, st) ∧ refs ≠ [] ∧ ¬ dups(refs) ∧ refs .first = r ∧ refs .last = jvmref, ¬ r0 ∈ refs0 ∧ ¬ dups(refs0), (dups(refs0) ∨ r0 ∈ refs0 ∨ r ∈ refs0) ∧ validrefs(str, r ' + r0 ' + refs0, st[r -- _type] .type, st)

User applied rule case distinction

And obtained the following new goals

Rule argument

[CASEDARG : pos: right 7, ()]

Additional information

[[CONCRETESIMPRULES : ()]]