Gurobi 5.0.1 (linux64) logging started Fri Nov 16 08:11:03 2012

Optimize a model with 13166 rows, 4032 columns and 43216 nonzeros
Presolve removed 2 rows and 2 columns
Presolve time: 0.37s
Presolved: 13227 rows, 4030 columns, 46767 nonzeros
Variable types: 0 continuous, 4030 integer (4030 binary)
Found heuristic solution: objective 63.0000000

Root relaxation: objective 2.000000e+00, 2714 iterations, 0.09 seconds

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

     0     0    2.00000    0  126   63.00000    2.00000  96.8%     -    0s
H    0     0                      61.0000000    2.00000  96.7%     -    0s
H    0     0                       5.0000000    2.00000  60.0%     -    0s
     0     0    3.00000    0 2488    5.00000    3.00000  40.0%     -    3s
     0     0    3.00826    0 2836    5.00000    3.00826  39.8%     -    5s
     0     0    3.00826    0 2594    5.00000    3.00826  39.8%     -   16s
     0     2    3.50000    0 2594    5.00000    3.50000  30.0%     -   25s
*    9     3               8       4.0000000    4.00000   0.0%  2201   26s

Cutting planes:
  Clique: 26
  Zero half: 4

Explored 10 nodes (80001 simplex iterations) in 26.14 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%