Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:43:28 2012

Optimize a model with 878 rows, 59 columns and 1756 nonzeros
Presolve removed 609 rows and 0 columns
Presolve time: 0.01s
Presolved: 269 rows, 59 columns, 1537 nonzeros
Variable types: 0 continuous, 59 integer (59 binary)
Found heuristic solution: objective 6.0000000

Root relaxation: objective 1.031634e+01, 145 iterations, 0.00 seconds

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

     0     0   10.31634    0   58    6.00000   10.31634  71.9%     -    0s
     0     0   10.03459    0   58    6.00000   10.03459  67.2%     -    0s
H    0     0                       7.0000000   10.03459  43.4%     -    0s
     0     0    9.97933    0   58    7.00000    9.97933  42.6%     -    0s
     0     0    9.96045    0   58    7.00000    9.96045  42.3%     -    0s
     0     0    9.92195    0   59    7.00000    9.92195  41.7%     -    0s
     0     0    9.89532    0   58    7.00000    9.89532  41.4%     -    0s
     0     0    9.87419    0   58    7.00000    9.87419  41.1%     -    0s
     0     0    9.87036    0   59    7.00000    9.87036  41.0%     -    0s
     0     2    9.86909    0   59    7.00000    9.86909  41.0%     -    0s
*   17     7               3       8.0000000    9.72498  21.6%  41.9    0s

Cutting planes:
  Clique: 19
  Zero half: 11

Explored 25 nodes (1228 simplex iterations) in 0.16 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%