title: Choco solver propogation and search strategy interaction
body: <p>I have started to use choco-solver in my work and didn't understand how propogator and search stradegies interart with each other.</p>
  
  <p>I think choco has some flag that shows me if there is any domain of constraint variables that is changed during propogation. And if there is, then propogation starts again and again until no domain changes occur. And after that, if constraint still not satisfied or fails, search strategies will be connected to solving process.</p>
  
  <p>But output of my progamm shows me that I'm wrong. Propogator really works 2 or 3 times, changing domains each time, but then search strategy is called.</p>
  
  <p>Help me please, where am I wrong in my conclusions? 
  Or it should work just the way I think and there is some mistakes in my code, that lead to wrong output? </p>
  
  <p>Sorry for my bad english</p>