Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:34:02 2012

Optimize a model with 502 rows, 143 columns and 1004 nonzeros
Presolve removed 87 rows and 2 columns
Presolve time: 0.00s
Presolved: 415 rows, 141 columns, 877 nonzeros
Variable types: 0 continuous, 141 integer (141 binary)
Found heuristic solution: objective 50.0000000

Root relaxation: objective 6.200000e+01, 252 iterations, 0.00 seconds

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

     0     0   62.00000    0  116   50.00000   62.00000  24.0%     -    0s
     0     0   60.50000    0  117   50.00000   60.50000  21.0%     -    0s
     0     0   60.00000    0  140   50.00000   60.00000  20.0%     -    0s
     0     0   58.97143    0  140   50.00000   58.97143  17.9%     -    0s
     0     0   58.50000    0  139   50.00000   58.50000  17.0%     -    0s
     0     0   57.97992    0  141   50.00000   57.97992  16.0%     -    0s
     0     0   57.81228    0  141   50.00000   57.81228  15.6%     -    0s
     0     0   57.52165    0  139   50.00000   57.52165  15.0%     -    0s
     0     0   57.36559    0  139   50.00000   57.36559  14.7%     -    0s
     0     0   57.18850    0  141   50.00000   57.18850  14.4%     -    0s
     0     0   57.09440    0  141   50.00000   57.09440  14.2%     -    0s
     0     0   57.07559    0  141   50.00000   57.07559  14.2%     -    0s
     0     0   57.07559    0  141   50.00000   57.07559  14.2%     -    0s
     0     2   57.07237    0  141   50.00000   57.07237  14.1%     -    0s
*  466   134              10      51.0000000   54.59565  7.05%  31.9    0s
  1789   128   52.33333   29   92   51.00000   53.00000  3.92%  25.8    5s

Cutting planes:
  Gomory: 5
  Zero half: 66

Explored 2126 nodes (51708 simplex iterations) in 5.22 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.100000000000e+01, best bound 5.100000000000e+01, gap 0.0%