Gurobi 5.0.1 (linux64) logging started Fri Nov 16 03:47:56 2012

Optimize a model with 5151 rows, 2162 columns and 17386 nonzeros
Presolve removed 1014 rows and 2 columns
Presolve time: 0.11s
Presolved: 4137 rows, 2160 columns, 14906 nonzeros
Variable types: 0 continuous, 2160 integer (2160 binary)
Found heuristic solution: objective 46.0000000

Root relaxation: objective 3.000000e+00, 3655 iterations, 0.38 seconds

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

     0     0    3.00000    0   78   46.00000    3.00000  93.5%     -    2s
H    0     0                       4.0000000    3.00000  25.0%     -    2s
     0     0    3.00000    0  188    4.00000    3.00000  25.0%     -    2s
     0     0    3.00000    0  114    4.00000    3.00000  25.0%     -    3s
     0     0    3.00000    0   69    4.00000    3.00000  25.0%     -    4s
     0     0    3.00000    0   48    4.00000    3.00000  25.0%     -    5s
     0     0    3.00000    0   81    4.00000    3.00000  25.0%     -    6s
     0     0    3.00000    0   54    4.00000    3.00000  25.0%     -    7s
     0     0    3.00000    0   60    4.00000    3.00000  25.0%     -    8s
     0     0    3.00000    0   70    4.00000    3.00000  25.0%     -    9s
     0     0    3.00000    0   70    4.00000    3.00000  25.0%     -    9s
     0     2    3.00000    0   70    4.00000    3.00000  25.0%     -   10s

Cutting planes:
  Zero half: 3

Explored 7 nodes (76575 simplex iterations) in 12.02 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%