Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:43:19 2012

Optimize a model with 672 rows, 52 columns and 1344 nonzeros
Presolve removed 480 rows and 0 columns
Presolve time: 0.01s
Presolved: 192 rows, 52 columns, 1095 nonzeros
Variable types: 0 continuous, 52 integer (52 binary)
Found heuristic solution: objective 8.0000000

Root relaxation: objective 9.318725e+00, 110 iterations, 0.00 seconds

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

     0     0    9.31873    0   45    8.00000    9.31873  16.5%     -    0s
     0     0     cutoff    0         8.00000    8.99999  12.5%     -    0s

Explored 0 nodes (123 simplex iterations) in 0.01 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%