Gurobi 5.0.1 (linux64) logging started Fri Nov 16 01:43:20 2012

Optimize a model with 6090 rows, 870 columns and 19024 nonzeros
Presolve time: 0.06s
Presolved: 6090 rows, 870 columns, 26643 nonzeros
Variable types: 0 continuous, 870 integer (870 binary)
Found heuristic solution: objective 18.0000000

Root relaxation: objective 2.000000e+00, 157 iterations, 0.02 seconds

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

     0     0    2.00000    0   58   18.00000    2.00000  88.9%     -    0s
H    0     0                      12.0000000    2.00000  83.3%     -    0s
H    0     0                       9.0000000    2.00000  77.8%     -    0s
     0     0    2.00000    0   58    9.00000    2.00000  77.8%     -    0s
     0     0    2.00000    0   58    9.00000    2.00000  77.8%     -    0s
     0     0    2.00000    0   58    9.00000    2.00000  77.8%     -    0s
H    0     0                       8.0000000    2.00000  75.0%     -    0s
     0     0    2.00000    0   58    8.00000    2.00000  75.0%     -    1s
     0     0    2.00000    0   58    8.00000    2.00000  75.0%     -    1s
     0     0    2.00000    0   58    8.00000    2.00000  75.0%     -    1s
     0     2    2.00000    0   58    8.00000    2.00000  75.0%     -    2s
*   26    16              17       7.0000000    3.00000  57.1%   449    4s
    44    24     cutoff   12         7.00000    3.00000  57.1%   442    5s
   222    64    5.50000    5   45    7.00000    4.00508  42.8%   266   10s
   470    84    6.00000   10   64    7.00000    5.25000  25.0%   215   15s

Explored 610 nodes (125577 simplex iterations) in 17.47 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 7.000000000000e+00, best bound 7.000000000000e+00, gap 0.0%