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Proof step 40 from proof validrefs-delcycle-01 (conclusion)

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

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 39:
validrefs(str, refs + r ' + refs0 + r ' + refs1, ty, st) ⊦ validrefs(str, refs + r ' + refs1, ty, st)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ()]]