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Proof step 90 from proof validrefs-del-junkrefs (conclusion)

⊦ junkrefs(str, (r0 ' + refs) + r ', ty, st -- r) ∧ ¬ junkref(str, r0, st) ∧ r ≠ r0 ∧ ¬ r ∈ refs ∧ st[r0 -- _type] .type ≤ ty → validrefs(str, r0 ' + refs + r ', ty, st)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 89:
st[r0 -- _type] .type ≤ ty, junkrefs(str, (r0 ' + refs) + r ', ty, st -- r) ⊦ r = r0, junkref(str, r0, st), r ∈ refs, validrefs(str, r0 ' + refs + r ', ty, st)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ()]]