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Proof step 11 from proof validrefs-delcycle-01 (previous step)

validrefs(str, r ' + refs0 + r ' + refs1, ty, st) ⊦ validrefs(str, r ' + refs1, ty, st)

User applied rule cut formula

And obtained the following new goals

Proof step 10:
r ' + refs0 + r ' + refs1 = (r ' + refs0) + r ' + refs1, validrefs(str, r ' + refs0 + r ' + refs1, ty, st) ⊦ validrefs(str, r ' + refs1, ty, st)

Rule argument

[fma-arg: r ' + refs0 + r ' + refs1 = (r ' + refs0) + r ' + refs1]

Additional information

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