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    • Kim Nguyễn's avatar
      Fix a bug where some variables appeared artificially as invariant, · 3c1254ea
      Kim Nguyễn authored
      because they appeared both on negative and positive occurences in bdds
      that are equivalent to the empty type.
      
      For instance t = ('a | (Int\'a) | Int)
      
      We use product normalization to clean up this.
      
      Use the new debugging infrastructure to see what is going on during constraint solving.
      3c1254ea