Gurobi 5.0.1 (linux64) logging started Fri Nov 16 03:20:31 2012

Optimize a model with 3696 rows, 1806 columns and 12726 nonzeros
Presolve removed 715 rows and 42 columns
Presolve time: 0.07s
Presolved: 2981 rows, 1764 columns, 11004 nonzeros
Variable types: 0 continuous, 1764 integer (1764 binary)
Found heuristic solution: objective 24.0000000

Root relaxation: objective 3.000000e+00, 3170 iterations, 0.19 seconds

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

     0     0    3.00000    0   86   24.00000    3.00000  87.5%     -    0s
H    0     0                       4.0000000    3.00000  25.0%     -    0s
     0     0    3.00000    0   97    4.00000    3.00000  25.0%     -    0s
     0     0    3.00000    0   84    4.00000    3.00000  25.0%     -    0s
     0     0    3.00000    0  102    4.00000    3.00000  25.0%     -    1s
     0     0    3.00000    0  104    4.00000    3.00000  25.0%     -    2s
     0     0    3.00000    0   95    4.00000    3.00000  25.0%     -    2s
     0     0    3.00000    0  125    4.00000    3.00000  25.0%     -    3s
     0     0    3.00000    0   40    4.00000    3.00000  25.0%     -    4s
     0     0    3.00000    0   68    4.00000    3.00000  25.0%     -    4s
     0     0    3.00000    0   68    4.00000    3.00000  25.0%     -    4s
     0     2    3.00000    0   59    4.00000    3.00000  25.0%     -    5s
    10     8    3.00000    1   46    4.00000    3.00000  25.0%   211   10s

Cutting planes:
  Gomory: 2
  Zero half: 2

Explored 12 nodes (98461 simplex iterations) in 11.93 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%