Gurobi 5.0.1 (linux64) logging started Tue Nov 20 13:34:43 2012

Optimize a model with 849 rows, 181 columns and 1698 nonzeros
Presolve removed 203 rows and 0 columns
Presolve time: 0.00s
Presolved: 646 rows, 181 columns, 1427 nonzeros
Variable types: 0 continuous, 181 integer (181 binary)
Found heuristic solution: objective 49.0000000

Root relaxation: objective 7.103571e+01, 434 iterations, 0.01 seconds

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

     0     0   71.03571    0  176   49.00000   71.03571  45.0%     -    0s
H    0     0                      58.0000000   71.03571  22.5%     -    0s
     0     0   69.82911    0  175   58.00000   69.82911  20.4%     -    0s
     0     0   69.22383    0  175   58.00000   69.22383  19.4%     -    0s
     0     0   68.98408    0  176   58.00000   68.98408  18.9%     -    0s
     0     0   68.76418    0  179   58.00000   68.76418  18.6%     -    0s
     0     0   68.55681    0  178   58.00000   68.55681  18.2%     -    0s
     0     0   68.48279    0  179   58.00000   68.48279  18.1%     -    0s
     0     0   68.35716    0  177   58.00000   68.35716  17.9%     -    0s
     0     0   68.25934    0  179   58.00000   68.25934  17.7%     -    0s
     0     0   68.18426    0  178   58.00000   68.18426  17.6%     -    0s
     0     0   67.98218    0  179   58.00000   67.98218  17.2%     -    0s
     0     0   67.82159    0  179   58.00000   67.82159  16.9%     -    0s
     0     0   67.78258    0  179   58.00000   67.78258  16.9%     -    0s
     0     0   67.76718    0  180   58.00000   67.76718  16.8%     -    0s
     0     0   67.75690    0  179   58.00000   67.75690  16.8%     -    0s
     0     0   67.75445    0  180   58.00000   67.75445  16.8%     -    0s
     0     0   67.75445    0  180   58.00000   67.75445  16.8%     -    0s
     0     2   67.75385    0  180   58.00000   67.75385  16.8%     -    0s
*   16    14              11      59.0000000   67.75385  14.8%  60.8    0s
H  108    50                      60.0000000   66.84550  11.4%  51.4    0s
   612   208   62.10000   15  179   60.00000   64.88350  8.14%  51.1    5s
  1813   401   63.38182   22  136   60.00000   63.64087  6.07%  48.3   10s

Cutting planes:
  Gomory: 3
  Clique: 1
  Zero half: 68

Explored 3437 nodes (142135 simplex iterations) in 13.32 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%