Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:39:53 2012

Optimize a model with 653 rows, 157 columns and 1306 nonzeros
Presolve removed 140 rows and 0 columns
Presolve time: 0.00s
Presolved: 513 rows, 157 columns, 1117 nonzeros
Variable types: 0 continuous, 157 integer (157 binary)
Found heuristic solution: objective 48.0000000

Root relaxation: objective 6.262500e+01, 308 iterations, 0.01 seconds

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

     0     0   62.62500    0  148   48.00000   62.62500  30.5%     -    0s
     0     0   61.60909    0  151   48.00000   61.60909  28.4%     -    0s
H    0     0                      49.0000000   61.60909  25.7%     -    0s
     0     0   61.00000    0  152   49.00000   61.00000  24.5%     -    0s
     0     0   60.60071    0  156   49.00000   60.60071  23.7%     -    0s
     0     0   60.33412    0  154   49.00000   60.33412  23.1%     -    0s
H    0     0                      51.0000000   60.33412  18.3%     -    0s
     0     0   60.09682    0  154   51.00000   60.09682  17.8%     -    0s
     0     0   59.70127    0  154   51.00000   59.70127  17.1%     -    0s
     0     0   59.68171    0  154   51.00000   59.68171  17.0%     -    0s
     0     0   59.68171    0  153   51.00000   59.68171  17.0%     -    0s
     0     2   59.68171    0  153   51.00000   59.68171  17.0%     -    0s
*   54    29              20      52.0000000   59.47061  14.4%  44.9    0s
*  358   121               9      53.0000000   57.84817  9.15%  37.7    0s
   611   176   55.25000   14  156   53.00000   57.11199  7.76%  36.8    5s
   625   185   56.53927   11  156   53.00000   57.11199  7.76%  36.0   10s

Cutting planes:
  Zero half: 187

Explored 2167 nodes (78466 simplex iterations) in 13.71 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.300000000000e+01, best bound 5.300000000000e+01, gap 0.0%