Gurobi 5.0.1 (linux64) logging started Tue Nov 20 13:07:51 2012

Optimize a model with 734 rows, 172 columns and 1468 nonzeros
Presolve removed 147 rows and 2 columns
Presolve time: 0.00s
Presolved: 587 rows, 170 columns, 1266 nonzeros
Variable types: 0 continuous, 170 integer (170 binary)
Found heuristic solution: objective 55.0000000

Root relaxation: objective 7.125000e+01, 274 iterations, 0.00 seconds

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

     0     0   71.25000    0  140   55.00000   71.25000  29.5%     -    0s
     0     0   69.72222    0  166   55.00000   69.72222  26.8%     -    0s
     0     0   68.09408    0  167   55.00000   68.09408  23.8%     -    0s
     0     0   67.39286    0  170   55.00000   67.39286  22.5%     -    0s
     0     0   66.99255    0  170   55.00000   66.99255  21.8%     -    0s
H    0     0                      56.0000000   66.99255  19.6%     -    0s
     0     0   66.68933    0  170   56.00000   66.68933  19.1%     -    0s
     0     0   66.33805    0  170   56.00000   66.33805  18.5%     -    0s
     0     0   66.22542    0  169   56.00000   66.22542  18.3%     -    0s
     0     0   66.18419    0  170   56.00000   66.18419  18.2%     -    0s
     0     0   66.11966    0  170   56.00000   66.11966  18.1%     -    0s
     0     0   65.96117    0  170   56.00000   65.96117  17.8%     -    0s
     0     0   65.89684    0  170   56.00000   65.89684  17.7%     -    0s
     0     0   65.72886    0  168   56.00000   65.72886  17.4%     -    0s
     0     0   65.64699    0  169   56.00000   65.64699  17.2%     -    0s
     0     0   65.55623    0  169   56.00000   65.55623  17.1%     -    0s
     0     0   65.52391    0  169   56.00000   65.52391  17.0%     -    0s
     0     0   65.52391    0  168   56.00000   65.52391  17.0%     -    0s
     0     2   65.51938    0  168   56.00000   65.51938  17.0%     -    0s
H   27    14                      57.0000000   65.36852  14.7%  46.4    0s
*   51    27              12      58.0000000   65.18882  12.4%  53.5    0s
*  138    43              11      59.0000000   64.10630  8.65%  48.2    0s
   614   151   62.77187   11  168   59.00000   62.77187  6.39%  48.1    5s

Cutting planes:
  Gomory: 4
  Clique: 1
  Zero half: 82

Explored 1908 nodes (79972 simplex iterations) in 7.35 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.900000000000e+01, best bound 5.900000000000e+01, gap 0.0%