Gurobi 5.0.1 (linux64) logging started Tue Nov 20 13:11:23 2012

Optimize a model with 750 rows, 174 columns and 1500 nonzeros
Presolve removed 142 rows and 0 columns
Presolve time: 0.00s
Presolved: 608 rows, 174 columns, 1307 nonzeros
Variable types: 0 continuous, 174 integer (174 binary)
Found heuristic solution: objective 57.0000000

Root relaxation: objective 7.275000e+01, 340 iterations, 0.01 seconds

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

     0     0   72.75000    0  150   57.00000   72.75000  27.6%     -    0s
     0     0   71.28385    0  173   57.00000   71.28385  25.1%     -    0s
     0     0   69.79444    0  172   57.00000   69.79444  22.4%     -    0s
     0     0   69.21304    0  174   57.00000   69.21304  21.4%     -    0s
     0     0   68.71341    0  174   57.00000   68.71341  20.5%     -    0s
     0     0   68.39765    0  174   57.00000   68.39765  20.0%     -    0s
     0     0   67.91444    0  174   57.00000   67.91444  19.1%     -    0s
     0     0   67.56846    0  174   57.00000   67.56846  18.5%     -    0s
     0     0   67.34649    0  174   57.00000   67.34649  18.2%     -    0s
     0     0   67.08910    0  173   57.00000   67.08910  17.7%     -    0s
     0     0   67.03335    0  174   57.00000   67.03335  17.6%     -    0s
     0     0   67.03335    0  174   57.00000   67.03335  17.6%     -    0s
     0     2   67.03228    0  173   57.00000   67.03228  17.6%     -    0s
*   17    17              14      59.0000000   67.03228  13.6%  54.2    0s
*  339   116              16      60.0000000   64.59898  7.66%  56.6    0s
   613   161   63.91089   12  169   60.00000   63.91089  6.52%  54.5    5s

Cutting planes:
  Gomory: 3
  Zero half: 76

Explored 2223 nodes (97696 simplex iterations) in 8.11 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 6.000000000000e+01, best bound 6.000000000000e+01, gap 0.0%