Gurobi 5.0.1 (linux64) logging started Fri Nov 16 12:38:41 2012

Optimize a model with 19151 rows, 5256 columns and 62350 nonzeros
Presolve removed 2 rows and 2 columns
Presolve time: 0.69s
Presolved: 19149 rows, 5254 columns, 61818 nonzeros
Variable types: 0 continuous, 5254 integer (5254 binary)
Found heuristic solution: objective 71.0000000

Root relaxation: objective 2.000000e+00, 3687 iterations, 0.16 seconds

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

     0     0    2.00000    0  144   71.00000    2.00000  97.2%     -    1s
H    0     0                      66.0000000    2.00000  97.0%     -    1s
H    0     0                       5.0000000    2.00000  60.0%     -    1s
     0     0    3.00000    0 3754    5.00000    3.00000  40.0%     -   15s
H    0     0                       4.0000000    3.00000  25.0%     -   18s
     0     0 infeasible    0         4.00000    3.00001  25.0%     -   19s

Cutting planes:
  Clique: 79

Explored 0 nodes (46811 simplex iterations) in 19.73 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%