Gurobi 5.0.1 (linux64) logging started Fri Nov 16 14:53:21 2012

Optimize a model with 23331 rows, 5852 columns and 75466 nonzeros
Presolve removed 2 rows and 2 columns
Presolve time: 0.73s
Presolved: 23405 rows, 5850 columns, 80628 nonzeros
Variable types: 0 continuous, 5850 integer (5850 binary)
Found heuristic solution: objective 76.0000000

Root relaxation: objective 2.000000e+00, 3908 iterations, 0.18 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                      71.0000000    2.00000  97.2%     -    1s
H    0     0                       5.0000000    2.00000  60.0%     -    1s
     0     0    3.00000    0 1294    5.00000    3.00000  40.0%     -   19s
     0     0    3.00000    0 1279    5.00000    3.00000  40.0%     -   21s
     0     0    3.00000    0 1734    5.00000    3.00000  40.0%     -   23s
     0     0    3.00000    0  198    5.00000    3.00000  40.0%     -   36s
     0     0    3.00680    0 4509    5.00000    3.00680  39.9%     -   57s
     0     0    3.00680    0 4464    5.00000    3.00680  39.9%     -   62s
     0     0    3.00680    0 4476    5.00000    3.00680  39.9%     -   63s
     0     0    3.00680    0 4475    5.00000    3.00680  39.9%     -   76s
     0     0    3.00680    0 4475    5.00000    3.00680  39.9%     -   89s
     0     2    3.50000    0 4475    5.00000    3.50000  30.0%     -  121s
     7     7    4.00000    6  134    5.00000    4.00000  20.0%  5198  125s
H   27     0                       4.0000000    4.00000   0.0%  2311  129s

Cutting planes:
  Clique: 56
  Zero half: 3

Explored 27 nodes (268473 simplex iterations) in 129.26 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%