Gurobi 5.0.1 (linux64) logging started Fri Nov 16 14:36:18 2012

Optimize a model with 20399 rows, 5700 columns and 66523 nonzeros
Presolve removed 2 rows and 2 columns
Presolve time: 0.71s
Presolved: 20472 rows, 5698 columns, 71604 nonzeros
Variable types: 0 continuous, 5698 integer (5698 binary)
Found heuristic solution: objective 75.0000000

Root relaxation: objective 2.000000e+00, 4269 iterations, 0.20 seconds

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

     0     0    2.00000    0  150   75.00000    2.00000  97.3%     -    1s
H    0     0                      73.0000000    2.00000  97.3%     -    1s
H    0     0                       5.0000000    2.00000  60.0%     -    1s
     0     0    3.00000    0 1899    5.00000    3.00000  40.0%     -   15s
     0     0    3.00000    0  181    5.00000    3.00000  40.0%     -   19s
     0     0    3.50000    0 2319    5.00000    3.50000  30.0%     -   24s
     0     0    3.50000    0 2420    5.00000    3.50000  30.0%     -   27s
     0     0    3.50000    0  527    5.00000    3.50000  30.0%     -   34s
H    0     0                       4.0000000    3.50000  12.5%     -   34s

Cutting planes:
  Clique: 17

Explored 0 nodes (91053 simplex iterations) in 34.70 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%