Gurobi 5.0.1 (linux64) logging started Fri Nov 16 04:21:50 2012

Optimize a model with 6799 rows, 2550 columns and 22698 nonzeros
Presolve removed 1502 rows and 2 columns
Presolve time: 0.18s
Presolved: 5347 rows, 2548 columns, 21886 nonzeros
Variable types: 0 continuous, 2548 integer (2548 binary)
Found heuristic solution: objective 50.0000000

Root relaxation: objective 3.000000e+00, 5561 iterations, 0.94 seconds

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

     0     0    3.00000    0  120   50.00000    3.00000  94.0%     -    3s
H    0     0                      42.0000000    3.00000  92.9%     -    3s
H    0     0                       5.0000000    3.00000  40.0%     -    3s
     0     0    3.00631    0 1735    5.00000    3.00631  39.9%     -    4s
H    0     0                       4.0000000    3.00631  24.8%     -    4s

Cutting planes:
  Gomory: 3
  Zero half: 6

Explored 0 nodes (21546 simplex iterations) in 4.46 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%