Gurobi 5.0.1 (linux64) logging started Fri Nov 16 12:57:37 2012

Optimize a model with 18761 rows, 5402 columns and 61393 nonzeros
Presolve time: 0.15s
Presolved: 18761 rows, 5402 columns, 61484 nonzeros
Variable types: 0 continuous, 5402 integer (5402 binary)
Found heuristic solution: objective 41.0000000

Root relaxation: objective 2.000000e+00, 4499 iterations, 0.16 seconds

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

     0     0    2.00000    0  146   41.00000    2.00000  95.1%     -    1s
H    0     0                      14.0000000    2.00000  85.7%     -    1s
H    0     0                       5.0000000    2.00000  60.0%     -    1s
     0     0    2.00000    0  146    5.00000    2.00000  60.0%     -    3s
     0     0    2.00000    0  146    5.00000    2.00000  60.0%     -   13s
     0     0    2.00000    0  146    5.00000    2.00000  60.0%     -   24s
     0     0    2.00000    0  146    5.00000    2.00000  60.0%     -   36s
     0     0    2.00000    0  146    5.00000    2.00000  60.0%     -   43s
     0     0    2.00000    0  146    5.00000    2.00000  60.0%     -   51s
     0     2    2.00000    0  146    5.00000    2.00000  60.0%     -   79s
     1     3    3.00000    1  621    5.00000    2.00000  60.0% 54080   93s
     2     4    3.00000    1  588    5.00000    3.00000  40.0% 44584  106s
     5     5    3.00000    2  252    5.00000    3.00000  40.0% 19680  110s
     9     7    3.16667    4  289    5.00000    3.00000  40.0% 14133  117s
    27    21    4.00000   20  104    5.00000    3.00000  40.0%  4950  120s
*   34     6              27       4.0000000    3.00000  25.0%  3933  120s
    38     4     cutoff    3         4.00000    3.00000  25.0%  4423  132s
    39     3     cutoff    3         4.00000    3.00000  25.0%  5091  143s
    42     2     cutoff    4         4.00000    3.00000  25.0%  5595  154s
    43     1     cutoff    4         4.00000    3.00000  25.0%  5961  160s

Cutting planes:
  Clique: 149

Explored 45 nodes (392226 simplex iterations) in 160.72 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%