Gurobi 5.0.1 (linux64) logging started Tue Nov 20 13:38:45 2012

Optimize a model with 832 rows, 182 columns and 1664 nonzeros
Presolve removed 184 rows and 0 columns
Presolve time: 0.01s
Presolved: 648 rows, 182 columns, 1420 nonzeros
Variable types: 0 continuous, 182 integer (182 binary)
Found heuristic solution: objective 51.0000000

Root relaxation: objective 7.333333e+01, 361 iterations, 0.01 seconds

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

     0     0   73.33333    0  162   51.00000   73.33333  43.8%     -    0s
     0     0   72.10933    0  181   51.00000   72.10933  41.4%     -    0s
H    0     0                      52.0000000   72.10933  38.7%     -    0s
H    0     0                      53.0000000   72.10933  36.1%     -    0s
     0     0   71.27760    0  179   53.00000   71.27760  34.5%     -    0s
     0     0   70.66314    0  177   53.00000   70.66314  33.3%     -    0s
H    0     0                      55.0000000   70.66314  28.5%     -    0s
     0     0   70.10552    0  180   55.00000   70.10552  27.5%     -    0s
     0     0   69.92699    0  179   55.00000   69.92699  27.1%     -    0s
     0     0   69.21049    0  181   55.00000   69.21049  25.8%     -    0s
     0     0   68.87041    0  179   55.00000   68.87041  25.2%     -    0s
     0     0   68.75543    0  180   55.00000   68.75543  25.0%     -    0s
     0     0   68.68771    0  176   55.00000   68.68771  24.9%     -    0s
     0     0   68.62735    0  176   55.00000   68.62735  24.8%     -    0s
     0     0   68.56142    0  177   55.00000   68.56142  24.7%     -    0s
     0     0   68.49626    0  178   55.00000   68.49626  24.5%     -    0s
     0     0   68.42723    0  179   55.00000   68.42723  24.4%     -    0s
     0     0   68.40800    0  179   55.00000   68.40800  24.4%     -    0s
     0     0   68.40800    0  178   55.00000   68.40800  24.4%     -    0s
     0     2   68.40741    0  178   55.00000   68.40741  24.4%     -    0s
H   65    48                      58.0000000   67.45070  16.3%  64.2    0s
   609   280   64.33806    5  179   58.00000   65.58839  13.1%  47.1    5s
H 1818   654                      59.0000000   65.14286  10.4%  45.8    9s
  2123   805   62.66667   24  127   59.00000   64.84184  9.90%  44.0   10s
  5445  1732   60.50000   29  107   59.00000   63.18519  7.09%  36.3   15s
  9349  1842   61.00000   27  108   59.00000   62.00000  5.08%  32.8   20s
*10001  1059              38      60.0000000   61.82143  3.04%  32.5   20s

Cutting planes:
  Gomory: 2
  Clique: 1
  Zero half: 71

Explored 11218 nodes (344687 simplex iterations) in 21.34 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%