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Proof step 48 from proof validrefs-append (conclusion)

⊦ validrefs(str, refs + r ', ty, st) ∧ validrefs(str, r ' + refs0, ty0, st) → validrefs(str, refs + r ' + refs0, ty, st)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 47:
validrefs(str, r ' + refs0, ty0, st), validrefs(str, refs + r ', ty, st) ⊦ validrefs(str, refs + r ' + refs0, ty, st)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ()]]