Gurobi 5.0.1 (linux64) logging started Fri Nov 16 01:43:55 2012

Optimize a model with 6292 rows, 870 columns and 19602 nonzeros
Presolve removed 2 rows and 2 columns
Presolve time: 0.08s
Presolved: 6290 rows, 868 columns, 25048 nonzeros
Variable types: 0 continuous, 868 integer (868 binary)
Found heuristic solution: objective 29.0000000

Root relaxation: objective 3.753247e+00, 6668 iterations, 0.41 seconds

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

     0     0    3.75325    0  633   29.00000    3.75325  87.1%     -    1s
H    0     0                      27.0000000    3.75325  86.1%     -    1s
     0     0    7.00000    0  115   27.00000    7.00000  74.1%     -    1s
H    0     0                      26.0000000    7.00000  73.1%     -    1s
H    0     0                       8.0000000    7.00000  12.5%     -    1s
     0     0    7.00000    0   44    8.00000    7.00000  12.5%     -    2s
     0     0    7.00000    0   27    8.00000    7.00000  12.5%     -    2s
     0     0    7.00000    0   91    8.00000    7.00000  12.5%     -    2s
     0     0    7.00000    0   14    8.00000    7.00000  12.5%     -    2s
     0     0    7.00000    0   14    8.00000    7.00000  12.5%     -    2s
     0     0    7.00000    0   23    8.00000    7.00000  12.5%     -    2s
     0     0    7.00000    0   24    8.00000    7.00000  12.5%     -    2s
     0     0    7.00000    0   24    8.00000    7.00000  12.5%     -    2s
     0     2    7.00000    0   14    8.00000    7.00000  12.5%     -    2s

Cutting planes:
  Clique: 2
  Zero half: 4

Explored 23 nodes (17329 simplex iterations) in 2.64 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 8.000000000000e+00, best bound 8.000000000000e+00, gap 0.0%