Gurobi 5.0.1 (linux64) logging started Fri Nov 16 16:04:28 2012

Optimize a model with 11469 rows, 5550 columns and 39588 nonzeros
Presolve removed 2075 rows and 76 columns
Presolve time: 0.50s
Presolved: 9394 rows, 5474 columns, 34450 nonzeros
Variable types: 0 continuous, 5474 integer (5474 binary)
Found heuristic solution: objective 74.0000000

Root relaxation: objective 3.000000e+00, 9286 iterations, 2.27 seconds
Total elapsed time = 6.26s

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

     0     0    3.00000    0 1348   74.00000    3.00000  95.9%     -    7s
H    0     0                      70.0000000    3.00000  95.7%     -    7s
H    0     0                       4.0000000    3.00000  25.0%     -    7s
     0     0    3.00000    0  361    4.00000    3.00000  25.0%     -    9s
     0     0    3.00000    0 2643    4.00000    3.00000  25.0%     -   10s
     0     0    3.00000    0  122    4.00000    3.00000  25.0%     -   17s
     0     0    3.00000    0  124    4.00000    3.00000  25.0%     -   20s
     0     0    3.00000    0  122    4.00000    3.00000  25.0%     -   25s
     0     0    3.00000    0   80    4.00000    3.00000  25.0%     -   29s
     0     0    3.00000    0   93    4.00000    3.00000  25.0%     -   33s
     0     0    3.00000    0  133    4.00000    3.00000  25.0%     -   40s
     0     0    3.00000    0   90    4.00000    3.00000  25.0%     -   45s
     0     0    3.00000    0  133    4.00000    3.00000  25.0%     -   49s
     0     0    3.00000    0  133    4.00000    3.00000  25.0%     -   53s
     0     2    3.00000    0  133    4.00000    3.00000  25.0%     -   63s
     4     4    3.00000    1 1161    4.00000    3.00000  25.0%  2978   74s
     5     5    3.00000    1  122    4.00000    3.00000  25.0%  2383   82s
     6     6    3.00000    1  119    4.00000    3.00000  25.0%  1986   87s
     7     6    3.00000    1  101    4.00000    3.00000  25.0%  1702   94s
     8     7    3.00000    1  107    4.00000    3.00000  25.0%  1489   99s
     9     8    3.00000    1  114    4.00000    3.00000  25.0%  1324  104s
    10     8    3.00000    1   87    4.00000    3.00000  25.0%  1191  115s
    11     9    3.00000    1  142    4.00000    3.00000  25.0%  1083  122s
    12    10    3.00000    1  102    4.00000    3.00000  25.0%   993  132s
    13    10    3.00000    1  136    4.00000    3.00000  25.0%   916  139s
    14    11    3.00000    1  394    4.00000    3.00000  25.0%   851  155s
    17    15    3.00000   16  151    4.00000    3.00000  25.0% 14557  166s

Cutting planes:
  Gomory: 9
  Zero half: 21

Explored 23 nodes (429070 simplex iterations) in 168.90 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%