Gurobi 5.0.1 (linux64) logging started Fri Nov 16 07:21:05 2012

Optimize a model with 11162 rows, 3782 columns and 36964 nonzeros
Presolve removed 2 rows and 2 columns
Presolve time: 0.29s
Presolved: 11160 rows, 3780 columns, 36598 nonzeros
Variable types: 0 continuous, 3780 integer (3780 binary)
Found heuristic solution: objective 61.0000000

Root relaxation: objective 2.000000e+00, 2692 iterations, 0.08 seconds

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

     0     0    2.00000    0  122   61.00000    2.00000  96.7%     -    0s
H    0     0                      57.0000000    2.00000  96.5%     -    0s
H    0     0                       5.0000000    2.00000  60.0%     -    0s
H    0     0                       4.0000000    2.00000  50.0%     -    0s
     0     0    2.66667    0  339    4.00000    2.66667  33.3%     -    1s
     0     0    2.68208    0 3395    4.00000    2.68208  32.9%     -    2s
     0     0    2.68208    0 3426    4.00000    2.68208  32.9%     -    4s
     0     0    2.68208    0 3033    4.00000    2.68208  32.9%     -    7s
     0     0    2.68208    0 3043    4.00000    2.68208  32.9%     -   10s
     0     0    2.68208    0 3138    4.00000    2.68208  32.9%     -   12s
     0     0    2.68208    0 3139    4.00000    2.68208  32.9%     -   15s
     0     0    2.68208    0 3139    4.00000    2.68208  32.9%     -   16s
     0     1    3.00000    0 3139    4.00000    3.00000  25.0%     -   22s

Cutting planes:
  Clique: 167
  Zero half: 6

Explored 6 nodes (58081 simplex iterations) in 23.70 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%