Gurobi 5.0.1 (linux64) logging started Tue Nov 20 13:59:13 2012

Optimize a model with 936 rows, 186 columns and 1872 nonzeros
Presolve removed 232 rows and 0 columns
Presolve time: 0.01s
Presolved: 704 rows, 186 columns, 1574 nonzeros
Variable types: 0 continuous, 186 integer (186 binary)
Found heuristic solution: objective 50.0000000

Root relaxation: objective 7.130000e+01, 444 iterations, 0.01 seconds

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

     0     0   71.30000    0  179   50.00000   71.30000  42.6%     -    0s
     0     0   70.02188    0  184   50.00000   70.02188  40.0%     -    0s
H    0     0                      52.0000000   70.02188  34.7%     -    0s
     0     0   69.25529    0  184   52.00000   69.25529  33.2%     -    0s
     0     0   68.73420    0  186   52.00000   68.73420  32.2%     -    0s
     0     0   68.31854    0  185   52.00000   68.31854  31.4%     -    0s
H    0     0                      53.0000000   68.31854  28.9%     -    0s
     0     0   68.18039    0  186   53.00000   68.18039  28.6%     -    0s
     0     0   68.08245    0  186   53.00000   68.08245  28.5%     -    0s
     0     0   67.86108    0  183   53.00000   67.86108  28.0%     -    0s
     0     0   67.73137    0  184   53.00000   67.73137  27.8%     -    0s
     0     0   67.66791    0  185   53.00000   67.66791  27.7%     -    0s
     0     0   67.59022    0  186   53.00000   67.59022  27.5%     -    0s
     0     0   67.48707    0  186   53.00000   67.48707  27.3%     -    0s
     0     0   67.41256    0  186   53.00000   67.41256  27.2%     -    0s
H    0     0                      54.0000000   67.41256  24.8%     -    0s
     0     0   67.38396    0  185   54.00000   67.38396  24.8%     -    0s
     0     0   67.37986    0  186   54.00000   67.37986  24.8%     -    0s
     0     0   67.37986    0  186   54.00000   67.37986  24.8%     -    0s
     0     2   67.37917    0  186   54.00000   67.37917  24.8%     -    0s
H  136    85                      55.0000000   66.44871  20.8%  61.6    0s
H  357   184                      56.0000000   65.57159  17.1%  58.3    1s
   608   326   57.66667   25  186   56.00000   65.06720  16.2%  54.7    5s
  1864   847   60.85135   27  147   56.00000   64.22263  14.7%  52.1   10s
H 3466  1154                      58.0000000   62.87500  8.41%  45.3   14s
  3892  1258   61.30000   22  140   58.00000   62.66667  8.05%  44.5   15s
  6505  1529   59.71875   35  134   58.00000   61.33333  5.75%  41.2   20s
  9525   965     cutoff   28        58.00000   60.20000  3.79%  38.4   25s

Cutting planes:
  Gomory: 6
  Zero half: 80

Explored 11175 nodes (404431 simplex iterations) in 26.63 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.800000000000e+01, best bound 5.800000000000e+01, gap 0.0%