Gurobi 5.0.1 (linux64) logging started Fri Nov 16 05:41:00 2012

Optimize a model with 8359 rows, 3080 columns and 27883 nonzeros
Presolve removed 2 rows and 2 columns
Presolve time: 0.16s
Presolved: 8412 rows, 3078 columns, 30604 nonzeros
Variable types: 0 continuous, 3078 integer (3078 binary)
Found heuristic solution: objective 55.0000000

Root relaxation: objective 2.000000e+00, 2266 iterations, 0.07 seconds

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

     0     0    2.00000    0  110   55.00000    2.00000  96.4%     -    0s
H    0     0                      50.0000000    2.00000  96.0%     -    0s
H    0     0                       5.0000000    2.00000  60.0%     -    0s
     0     0    2.66667    0  250    5.00000    2.66667  46.7%     -    1s
H    0     0                       4.0000000    2.66667  33.3%     -    1s
     0     0    2.67949    0 2520    4.00000    2.67949  33.0%     -    1s
     0     0    2.67949    0 2522    4.00000    2.67949  33.0%     -    2s
     0     0    2.67949    0 2426    4.00000    2.67949  33.0%     -    3s
     0     0    2.67949    0 2384    4.00000    2.67949  33.0%     -    4s
     0     0    2.67949    0 2378    4.00000    2.67949  33.0%     -    5s
     0     0    2.67949    0 2369    4.00000    2.67949  33.0%     -    7s
     0     0    2.67949    0 2369    4.00000    2.67949  33.0%     -    8s
     0     1    3.00000    0 2369    4.00000    3.00000  25.0%     -   10s

Cutting planes:
  Clique: 97
  Zero half: 4

Explored 10 nodes (28700 simplex iterations) in 11.25 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%