Gurobi 5.0.1 (linux64) logging started Fri Nov 16 14:41:55 2012

Optimize a model with 23331 rows, 5852 columns and 75466 nonzeros
Presolve removed 2 rows and 2 columns
Presolve time: 0.73s
Presolved: 23329 rows, 5850 columns, 74852 nonzeros
Variable types: 0 continuous, 5850 integer (5850 binary)
Found heuristic solution: objective 76.0000000

Root relaxation: objective 2.000000e+00, 3956 iterations, 0.17 seconds

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

     0     0    2.00000    0  152   76.00000    2.00000  97.4%     -    1s
H    0     0                      69.0000000    2.00000  97.1%     -    1s
H    0     0                       5.0000000    2.00000  60.0%     -    1s
     0     0    3.00000    0 2082    5.00000    3.00000  40.0%     -   18s
     0     0    3.00680    0 4047    5.00000    3.00680  39.9%     -   22s
H    0     0                       4.0000000    3.00680  24.8%     -   25s

Cutting planes:
  Clique: 65
  Zero half: 1

Explored 0 nodes (47285 simplex iterations) in 25.59 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%