Gurobi 5.0.1 (linux64) logging started Fri Nov 16 15:21:57 2012

Optimize a model with 7930 rows, 4290 columns and 27820 nonzeros
Presolve removed 1170 rows and 0 columns
Presolve time: 0.14s
Presolved: 6760 rows, 4290 columns, 24960 nonzeros
Variable types: 0 continuous, 4290 integer (4290 binary)
Found heuristic solution: objective 38.0000000

Root relaxation: objective 3.000000e+00, 5188 iterations, 0.47 seconds

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

     0     0    3.00000    0  130   38.00000    3.00000  92.1%     -    1s
H    0     0                       4.0000000    3.00000  25.0%     -    1s
H    0     0                       3.0000000    3.00000   0.0%     -    1s

Explored 0 nodes (14407 simplex iterations) in 1.95 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.000000000000e+00, best bound 3.000000000000e+00, gap 0.0%