code: private static void initializeWithConstantLength(List<Program> programs, LGP manager, RandEngine randEngine) {
        int popSize = manager.getPopulationSize();
  
        for(int i=0; i<popSize; ++i)
        {
           Program lgp= new Program();
           initialize(lgp, manager, randEngine, manager.getPopInitConstantProgramLength());
           programs.add(lgp);
        }
     }
docs: the program length is distributed uniformly between iMinProgLength and iMaxProgLength