Gurobi 5.0.1 (linux64) logging started Fri Nov 16 03:18:50 2012

Optimize a model with 3730 rows, 1722 columns and 12708 nonzeros
Presolve removed 945 rows and 2 columns
Presolve time: 0.11s
Presolved: 2785 rows, 1720 columns, 10276 nonzeros
Variable types: 0 continuous, 1720 integer (1720 binary)
Found heuristic solution: objective 41.0000000

Root relaxation: objective 3.000000e+00, 2658 iterations, 0.21 seconds

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

     0     0    3.00000    0  158   41.00000    3.00000  92.7%     -    1s
H    0     0                      37.0000000    3.00000  91.9%     -    1s
H    0     0                       4.0000000    3.00000  25.0%     -    1s
     0     0    3.00000    0  165    4.00000    3.00000  25.0%     -    1s
     0     0    3.00000    0   62    4.00000    3.00000  25.0%     -    2s
     0     0    3.00000    0   76    4.00000    3.00000  25.0%     -    3s
     0     0    3.00000    0   71    4.00000    3.00000  25.0%     -    4s
     0     0    3.00000    0   82    4.00000    3.00000  25.0%     -    5s
     0     0    3.00000    0   79    4.00000    3.00000  25.0%     -    5s
     0     0    3.00000    0   63    4.00000    3.00000  25.0%     -    6s
     0     0    3.00000    0   66    4.00000    3.00000  25.0%     -    7s
     0     0    3.00000    0   66    4.00000    3.00000  25.0%     -    7s
     0     2    3.00000    0   66    4.00000    3.00000  25.0%     -    8s
     4     4    3.00000    1  174    4.00000    3.00000  25.0%   583   10s
     9     9    3.00000   13  156    4.00000    3.00000  25.0%  3185   15s

Cutting planes:
  Gomory: 5
  Zero half: 10

Explored 36 nodes (94236 simplex iterations) in 19.74 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%