Gurobi 5.0.1 (linux64) logging started Fri Nov 16 06:37:11 2012

Optimize a model with 10915 rows, 3540 columns and 36049 nonzeros
Presolve time: 0.09s
Presolved: 10915 rows, 3540 columns, 36445 nonzeros
Variable types: 0 continuous, 3540 integer (3540 binary)
Found heuristic solution: objective 33.0000000

Root relaxation: objective 2.000000e+00, 3944 iterations, 0.21 seconds

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

     0     0    2.00000    0  118   33.00000    2.00000  93.9%     -    1s
H    0     0                      12.0000000    2.00000  83.3%     -    1s
H    0     0                       5.0000000    2.00000  60.0%     -    1s
     0     0    2.00000    0  118    5.00000    2.00000  60.0%     -    2s
     0     0    2.00000    0  118    5.00000    2.00000  60.0%     -    6s
     0     0    2.00000    0  118    5.00000    2.00000  60.0%     -   10s
     0     0    2.00000    0  118    5.00000    2.00000  60.0%     -   15s
     0     0    2.00000    0  118    5.00000    2.00000  60.0%     -   21s
     0     0    2.00000    0  118    5.00000    2.00000  60.0%     -   25s
     0     2    2.00000    0  118    5.00000    2.00000  60.0%     -   35s
     2     4    2.50000    1  117    5.00000    2.50000  50.0% 16880   44s
     6     8    4.00000    5  212    5.00000    2.50000  50.0%  6169   45s
*   22     8              19       4.0000000    2.50000  37.5%  1852   45s
    45     9     cutoff    2         4.00000    2.50000  37.5%  1463   52s

Cutting planes:
  Clique: 112

Explored 111 nodes (148601 simplex iterations) in 54.63 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%