Gurobi 5.0.1 (linux64) logging started Tue Nov 20 14:11:57 2012

Optimize a model with 866 rows, 187 columns and 1732 nonzeros
Presolve removed 190 rows and 0 columns
Presolve time: 0.01s
Presolved: 676 rows, 187 columns, 1476 nonzeros
Variable types: 0 continuous, 187 integer (187 binary)
Found heuristic solution: objective 49.0000000

Root relaxation: objective 7.325000e+01, 362 iterations, 0.01 seconds

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

     0     0   73.25000    0  161   49.00000   73.25000  49.5%     -    0s
     0     0   72.57768    0  181   49.00000   72.57768  48.1%     -    0s
     0     0   71.75354    0  182   49.00000   71.75354  46.4%     -    0s
H    0     0                      53.0000000   71.75354  35.4%     -    0s
     0     0   70.71103    0  182   53.00000   70.71103  33.4%     -    0s
     0     0   70.32981    0  185   53.00000   70.32981  32.7%     -    0s
     0     0   69.64709    0  184   53.00000   69.64709  31.4%     -    0s
     0     0   69.38911    0  184   53.00000   69.38911  30.9%     -    0s
     0     0   69.29737    0  183   53.00000   69.29737  30.7%     -    0s
     0     0   68.93991    0  184   53.00000   68.93991  30.1%     -    0s
     0     0   68.70815    0  183   53.00000   68.70815  29.6%     -    0s
     0     0   68.54444    0  184   53.00000   68.54444  29.3%     -    0s
     0     0   68.35788    0  185   53.00000   68.35788  29.0%     -    0s
     0     0   68.28089    0  183   53.00000   68.28089  28.8%     -    0s
     0     0   68.23250    0  184   53.00000   68.23250  28.7%     -    0s
     0     0   68.16819    0  185   53.00000   68.16819  28.6%     -    0s
     0     0   68.05367    0  184   53.00000   68.05367  28.4%     -    0s
     0     0   68.03364    0  187   53.00000   68.03364  28.4%     -    0s
     0     0   68.03364    0  184   53.00000   68.03364  28.4%     -    0s
     0     2   68.03260    0  184   53.00000   68.03260  28.4%     -    0s
*  159   113              21      54.0000000   67.37968  24.8%  56.5    0s
H  189    98                      57.0000000   67.17953  17.9%  55.3    0s
H  570   274                      58.0000000   66.28574  14.3%  51.3    1s
   710   333   63.70874    9  187   58.00000   65.82292  13.5%  51.3    5s
  2581  1108   60.50000   31  120   58.00000   64.61538  11.4%  48.4   10s
  5782  2484   60.90000   32  135   58.00000   63.22222  9.00%  39.6   15s
H 7836  1429                      60.0000000   62.85714  4.76%  36.9   17s
  9250  1097   61.75000   26  119   60.00000   62.06250  3.44%  36.5   20s

Cutting planes:
  Gomory: 3
  Clique: 1
  Zero half: 85
  Mod-K: 1

Explored 10965 nodes (375753 simplex iterations) in 21.74 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%