Gurobi 5.0.1 (linux64) logging started Fri Nov 16 14:42:21 2012

Optimize a model with 22419 rows, 5852 columns and 72730 nonzeros
Presolve removed 2 rows and 2 columns
Presolve time: 0.78s
Presolved: 22417 rows, 5850 columns, 72140 nonzeros
Variable types: 0 continuous, 5850 integer (5850 binary)
Found heuristic solution: objective 76.0000000

Root relaxation: objective 2.000000e+00, 4198 iterations, 0.19 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 4430    5.00000    3.00000  40.0%     -   25s
     0     0    3.00000    0 4430    5.00000    3.00000  40.0%     -   37s
     0     2    3.00000    0  118    5.00000    3.00000  40.0%     -   71s
     1     3    3.00339    1 3487    5.00000    3.00000  40.0% 56897   78s
    29    17     cutoff    2         5.00000    3.66667  26.7%  2521   82s
*   52     1              17       4.0000000    4.00000   0.0%  1592   83s

Cutting planes:
  Clique: 67
  Zero half: 3

Explored 53 nodes (169088 simplex iterations) in 83.75 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%