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Proof step 5 from proof cyclic-put-badclassfield (previous step)

is_classtype(st[r0 -- _type] .type), validrefs(str, (r ' + refs0) + r1 ', st[r -- _type] .type, st[r0 -- fs ', val]) ⊦ fs ' = _type, junkref(str, r, st), fs ' ∈ instfields(st[r0 -- _type] .type .class), dups(refs0), r ∈ refs0, r1 ≠ r ∧ ¬ r1 ∈ refs0, (r1 = r ∨ r1 ∈ refs0) ∧ validrefs(str, (r ' + refs0) + r1 ', st[r -- _type] .type, st)

User applied rule case distinction

And obtained the following new goals

Proof step 4:
is_classtype(st[r0 -- _type] .type), validrefs(str, (r ' + refs0) + r1 ', st[r -- _type] .type, st[r0 -- fs ', val]) ⊦ validrefs(str, (r ' + refs0) + r1 ', st[r -- _type] .type, st), fs ' = _type, junkref(str, r, st), fs ' ∈ instfields(st[r0 -- _type] .type .class), dups(refs0), r ∈ refs0, r1 ≠ r ∧ ¬ r1 ∈ refs0

Rule argument

[CASEDARG : pos: right 7, ()]

Additional information

[[CONCRETESIMPRULES : ()]]