Gurobi 5.0.1 (linux64) logging started Fri Nov 16 03:37:27 2012

Optimize a model with 5805 rows, 2070 columns and 19305 nonzeros
Presolve removed 1935 rows and 0 columns
Presolve time: 0.12s
Presolved: 3870 rows, 2070 columns, 15075 nonzeros
Variable types: 0 continuous, 2070 integer (2070 binary)
Found heuristic solution: objective 28.0000000

Root relaxation: objective 3.000000e+00, 3035 iterations, 0.26 seconds

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

     0     0    3.00000    0   62   28.00000    3.00000  89.3%     -    0s
H    0     0                       4.0000000    3.00000  25.0%     -    0s
     0     0    3.00000    0  307    4.00000    3.00000  25.0%     -    1s
     0     0    3.00000    0  142    4.00000    3.00000  25.0%     -    2s
     0     0    3.00000    0  150    4.00000    3.00000  25.0%     -    4s
     0     0    3.00000    0  151    4.00000    3.00000  25.0%     -    5s
     0     0    3.00000    0   54    4.00000    3.00000  25.0%     -    7s
     0     0    3.00000    0   83    4.00000    3.00000  25.0%     -    8s
     0     0    3.00000    0   84    4.00000    3.00000  25.0%     -    9s
     0     0    3.00000    0   84    4.00000    3.00000  25.0%     -    9s
     0     2    3.00000    0   84    4.00000    3.00000  25.0%     -   11s
     6     6    3.00000    1   86    4.00000    3.00000  25.0%   646   16s
     9     8    3.00000    1   56    4.00000    3.00000  25.0%   431   20s
    13    10    3.00000    1   54    4.00000    3.00000  25.0%   298   26s
    15    12    3.00000    1   54    4.00000    3.00000  25.0%   259   30s

Cutting planes:
  Gomory: 6

Explored 18 nodes (133170 simplex iterations) in 32.71 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%