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Proof step 9 from proof unchanged-junkref (previous step)

¬ (unchanged(str, (r ' + refs0) .first, st, st1) ∧ ¬ junkrefs(str, r ' + refs0, st1[r -- _type] .type, st)), unchanged(str, r, st, st1), junkrefs(str, r ' + refs0, st1[r -- _type] .type, st1) ⊦ junkrefs(str, r ' + refs0, st[r -- _type] .type, st)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 8:
unchanged(str, r, st, st1), junkrefs(str, r ' + refs0, st1[r -- _type] .type, st1), junkrefs(str, r ' + refs0, st1[r -- _type] .type, st) ⊦ junkrefs(str, r ' + refs0, st[r -- _type] .type, st)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ (r ' + refs) .first = r], [CSIMPSEQ : ⊦ (refs + refs0) + refs1 = refs + refs0 + refs1])]]