/**
  * Splits the domain of the first non-instantiated variable in the middle and branch first on the
  * left interval
  *
  * @param VARS list of variables
  * @return int strategy based on domain splits
  */
 public static IntStrategy lexico_Split(IntVar... VARS) {
   return dichotomic(ISF.lexico_var_selector(), true, VARS);
 }