Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:33:44 2012

Optimize a model with 488 rows, 142 columns and 976 nonzeros
Presolve removed 80 rows and 0 columns
Presolve time: 0.00s
Presolved: 408 rows, 142 columns, 867 nonzeros
Variable types: 0 continuous, 142 integer (142 binary)
Found heuristic solution: objective 47.0000000

Root relaxation: objective 6.100000e+01, 207 iterations, 0.00 seconds

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

     0     0   61.00000    0  110   47.00000   61.00000  29.8%     -    0s
     0     0   60.39286    0  141   47.00000   60.39286  28.5%     -    0s
     0     0   59.00000    0  139   47.00000   59.00000  25.5%     -    0s
H    0     0                      50.0000000   59.00000  18.0%     -    0s
     0     0   58.11340    0  137   50.00000   58.11340  16.2%     -    0s
     0     0   57.80723    0  140   50.00000   57.80723  15.6%     -    0s
     0     0   57.35592    0  140   50.00000   57.35592  14.7%     -    0s
     0     0   57.11156    0  141   50.00000   57.11156  14.2%     -    0s
     0     0   56.90481    0  141   50.00000   56.90481  13.8%     -    0s
     0     0   56.83860    0  141   50.00000   56.83860  13.7%     -    0s
H    0     0                      51.0000000   56.83860  11.4%     -    0s
     0     0   56.81683    0  141   51.00000   56.81683  11.4%     -    0s
     0     0   56.81683    0  141   51.00000   56.81683  11.4%     -    0s
     0     2   56.81430    0  140   51.00000   56.81430  11.4%     -    0s
*   22    13              16      52.0000000   56.81135  9.25%  22.2    0s
*  111    25              10      53.0000000   55.85512  5.39%  29.1    0s

Cutting planes:
  Zero half: 123

Explored 185 nodes (6414 simplex iterations) in 0.28 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%