Gurobi 5.0.1 (linux64) logging started Fri Nov 16 12:17:35 2012

Optimize a model with 16416 rows, 5256 columns and 54216 nonzeros
Presolve time: 0.12s
Presolved: 16416 rows, 5256 columns, 54319 nonzeros
Variable types: 0 continuous, 5256 integer (5256 binary)
Found heuristic solution: objective 43.0000000

Root relaxation: objective 2.000000e+00, 4736 iterations, 0.14 seconds

    Nodes    |    Current Node    |     Objective Bounds      |     Work
 Expl Unexpl |  Obj  Depth IntInf | Incumbent    BestBd   Gap | It/Node Time

     0     0    2.00000    0  144   43.00000    2.00000  95.3%     -    0s
H    0     0                      16.0000000    2.00000  87.5%     -    0s
H    0     0                       5.0000000    2.00000  60.0%     -    0s
     0     0    2.00000    0  144    5.00000    2.00000  60.0%     -    3s
     0     0    2.00000    0  144    5.00000    2.00000  60.0%     -   13s
     0     0    2.00000    0  144    5.00000    2.00000  60.0%     -   21s
     0     0    2.00000    0  144    5.00000    2.00000  60.0%     -   31s
H    0     0                       4.0000000    2.00000  50.0%     -   32s
     0     0    2.00000    0  144    4.00000    2.00000  50.0%     -   40s
     0     0    2.00000    0  144    4.00000    2.00000  50.0%     -   46s
     0     2    2.00000    0  144    4.00000    2.00000  50.0%     -   61s
     1     3    2.60000    1  473    4.00000    2.00000  50.0% 71220   79s
     2     4    2.50000    1  933    4.00000    2.50000  37.5% 53804   94s
     4     4    2.50000    2  801    4.00000    2.50000  37.5% 28122   96s
     6     4    2.66667    2  292    4.00000    2.50000  37.5% 21630  102s
    28     6    2.60000    2  225    4.00000    2.60000  35.0%  5013  105s

Cutting planes:
  Clique: 160

Explored 95 nodes (278317 simplex iterations) in 107.15 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.000000000000e+00, best bound 4.000000000000e+00, gap 0.0%