Gurobi 5.0.1 (linux64) logging started Fri Nov 16 04:02:06 2012

Optimize a model with 6095 rows, 2352 columns and 20398 nonzeros
Presolve removed 1538 rows and 2 columns
Presolve time: 0.14s
Presolved: 4557 rows, 2350 columns, 16704 nonzeros
Variable types: 0 continuous, 2350 integer (2350 binary)
Found heuristic solution: objective 48.0000000

Root relaxation: objective 3.000000e+00, 4771 iterations, 0.66 seconds

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

     0     0    3.00000    0   68   48.00000    3.00000  93.8%     -    2s
H    0     0                      17.0000000    3.00000  82.4%     -    2s
H    0     0                       4.0000000    3.00000  25.0%     -    2s
     0     0    3.00000    0  292    4.00000    3.00000  25.0%     -    3s
     0     0    3.00000    0   56    4.00000    3.00000  25.0%     -    5s
     0     0    3.00000    0  102    4.00000    3.00000  25.0%     -    5s
     0     0    3.00000    0  261    4.00000    3.00000  25.0%     -    8s
     0     0    3.00000    0  259    4.00000    3.00000  25.0%     -    8s
     0     2    3.00000    0  258    4.00000    3.00000  25.0%     -    9s
     2     3    3.00000    1  259    4.00000    3.00000  25.0%   625   11s
     5     5    3.00000    1   60    4.00000    3.00000  25.0%   250   17s
     7     6    3.00000    1  114    4.00000    3.00000  25.0%   179   20s
     9     8    3.00000    1  122    4.00000    3.00000  25.0%   139   26s
    11     9    3.00000    1   64    4.00000    3.00000  25.0%   114   32s

Cutting planes:
  Gomory: 29
  Zero half: 149

Explored 12 nodes (147751 simplex iterations) in 35.24 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%