Problem: I4-W5
Solution:
 Bag1: I4
  -- -- 02 03 -- 
  -- 01 02 03 04 
  00 01 02 03 04 
  00 01 02 03 04 
  00 01 -- -- 04 
  00 -- -- -- -- 
 Bag2: W5
  -- -- 07 07 -- 
  -- 05 05 07 07 
  05 05 06 06 07 
  05 00 00 06 06 
  00 00 -- -- 06 
  00 -- -- -- -- 
#squares: 20
#pieces:
 Bag1: 5
 Bag2: 4
CPU Time: 28.329s
Optimum: yes
Board Size: 30x30
Threads: 16
Choices: 2660410
Conflicts: 1140288
Restarts: 1131
Variables: 20874
Constraints: 64707