Gurobi 5.0.1 (linux64) logging started Fri Nov 16 03:09:59 2012

Optimize a model with 2765 rows, 1260 columns and 9415 nonzeros
Presolve removed 700 rows and 0 columns
Presolve time: 0.05s
Presolved: 2065 rows, 1260 columns, 7805 nonzeros
Variable types: 0 continuous, 1260 integer (1260 binary)
Found heuristic solution: objective 20.0000000

Root relaxation: objective 3.000000e+00, 2281 iterations, 0.12 seconds

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

     0     0    3.00000    0   40   20.00000    3.00000  85.0%     -    0s
H    0     0                       4.0000000    3.00000  25.0%     -    0s
     0     0    3.00000    0  111    4.00000    3.00000  25.0%     -    0s
     0     0    3.00000    0   77    4.00000    3.00000  25.0%     -    1s
     0     0    3.00000    0   67    4.00000    3.00000  25.0%     -    1s
     0     0    3.00000    0   73    4.00000    3.00000  25.0%     -    1s
     0     0    3.00000    0   79    4.00000    3.00000  25.0%     -    2s
     0     0    3.00000    0   80    4.00000    3.00000  25.0%     -    2s
     0     0    3.00000    0   80    4.00000    3.00000  25.0%     -    2s
     0     2    3.00000    0   67    4.00000    3.00000  25.0%     -    3s
     8     7    3.00000    1   46    4.00000    3.00000  25.0%   417    5s

Cutting planes:
  Gomory: 7
  Zero half: 3

Explored 17 nodes (85898 simplex iterations) in 8.79 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%