Gurobi 5.0.1 (linux64) logging started Fri Nov 16 04:14:36 2012

Optimize a model with 5950 rows, 2550 columns and 20200 nonzeros
Presolve removed 1400 rows and 0 columns
Presolve time: 0.13s
Presolved: 4550 rows, 2550 columns, 16850 nonzeros
Variable types: 0 continuous, 2550 integer (2550 binary)
Found heuristic solution: objective 30.0000000

Root relaxation: objective 3.000000e+00, 4829 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   68   30.00000    3.00000  90.0%     -    1s
H    0     0                       5.0000000    3.00000  40.0%     -    1s
H    0     0                       4.0000000    3.00000  25.0%     -    1s
     0     0    3.00000    0  139    4.00000    3.00000  25.0%     -    1s
     0     0    3.00000    0  105    4.00000    3.00000  25.0%     -    3s
     0     0    3.00000    0  112    4.00000    3.00000  25.0%     -    5s
     0     0    3.00000    0   94    4.00000    3.00000  25.0%     -    6s
     0     0    3.00000    0  121    4.00000    3.00000  25.0%     -    8s
     0     0    3.00000    0  121    4.00000    3.00000  25.0%     -    9s
     0     0    3.00000    0   86    4.00000    3.00000  25.0%     -   11s
     0     0    3.00000    0   91    4.00000    3.00000  25.0%     -   12s
     0     0    3.00000    0   89    4.00000    3.00000  25.0%     -   12s
     0     2    3.00000    0   89    4.00000    3.00000  25.0%     -   13s

Explored 3 nodes (95088 simplex iterations) in 14.72 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%