Gurobi 5.0.1 (linux64) logging started Fri Nov 16 13:18:26 2012

Optimize a model with 20074 rows, 5402 columns and 65260 nonzeros
Presolve removed 2 rows and 2 columns
Presolve time: 0.70s
Presolved: 20072 rows, 5400 columns, 64710 nonzeros
Variable types: 0 continuous, 5400 integer (5400 binary)
Found heuristic solution: objective 73.0000000

Root relaxation: objective 2.000000e+00, 3925 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  146   73.00000    2.00000  97.3%     -    1s
H    0     0                      70.0000000    2.00000  97.1%     -    1s
H    0     0                       5.0000000    2.00000  60.0%     -    1s
     0     0    3.00000    0 2708    5.00000    3.00000  40.0%     -   20s
     0     0    3.00000    0 2708    5.00000    3.00000  40.0%     -   29s
     0     2    3.00000    0 2708    5.00000    3.00000  40.0%     -   46s
     5     5    3.66667    3  639    5.00000    3.00000  40.0%  7313   50s
H   54     3                       4.0000000    3.66667  8.33%   999   55s

Cutting planes:
  Clique: 65
  Zero half: 4

Explored 54 nodes (136317 simplex iterations) in 55.25 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%