Gurobi 5.0.1 (linux64) logging started Fri Nov 16 12:55:34 2012

Optimize a model with 17228 rows, 5402 columns and 56794 nonzeros
Presolve time: 0.13s
Presolved: 17228 rows, 5402 columns, 56880 nonzeros
Variable types: 0 continuous, 5402 integer (5402 binary)
Found heuristic solution: objective 46.0000000

Root relaxation: objective 2.000000e+00, 7454 iterations, 1.05 seconds

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

     0     0    2.00000    0  146   46.00000    2.00000  95.7%     -    5s
H    0     0                      18.0000000    2.00000  88.9%     -    5s
H    0     0                       5.0000000    2.00000  60.0%     -    5s
     0     0    2.00000    0  146    5.00000    2.00000  60.0%     -    7s
     0     0    2.00000    0  146    5.00000    2.00000  60.0%     -   16s
H    0     0                       4.0000000    2.00000  50.0%     -   17s
     0     0    2.00000    0  146    4.00000    2.00000  50.0%     -   27s
     0     0    2.00000    0  146    4.00000    2.00000  50.0%     -   34s
     0     0    2.00000    0  146    4.00000    2.00000  50.0%     -   46s
     0     0    2.00000    0  146    4.00000    2.00000  50.0%     -   55s
     0     2    2.00000    0  146    4.00000    2.00000  50.0%     -   84s
     1     3    3.00000    1  859    4.00000    2.00000  50.0% 41651   97s
     2     4    3.00000    1  939    4.00000    3.00000  25.0% 32925  107s
    15     3    3.00000    3  140    4.00000    3.00000  25.0%  4963  110s
    21     3     cutoff    6         4.00000    3.00000  25.0%  4827  115s
    27     1     cutoff    4         4.00000    3.00000  25.0%  4329  121s

Cutting planes:
  Clique: 134

Explored 29 nodes (252594 simplex iterations) in 123.15 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%