Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:43:52 2012

Optimize a model with 634 rows, 161 columns and 1268 nonzeros
Presolve removed 113 rows and 0 columns
Presolve time: 0.00s
Presolved: 521 rows, 161 columns, 1117 nonzeros
Variable types: 0 continuous, 161 integer (161 binary)
Found heuristic solution: objective 54.0000000

Root relaxation: objective 6.750000e+01, 270 iterations, 0.00 seconds

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

     0     0   67.50000    0  123   54.00000   67.50000  25.0%     -    0s
     0     0   66.66667    0  149   54.00000   66.66667  23.5%     -    0s
     0     0   65.87500    0  144   54.00000   65.87500  22.0%     -    0s
     0     0   65.18453    0  159   54.00000   65.18453  20.7%     -    0s
H    0     0                      55.0000000   65.18453  18.5%     -    0s
     0     0   64.59106    0  160   55.00000   64.59106  17.4%     -    0s
H    0     0                      56.0000000   64.59106  15.3%     -    0s
     0     0   64.16947    0  159   56.00000   64.16947  14.6%     -    0s
     0     0   63.77034    0  160   56.00000   63.77034  13.9%     -    0s
     0     0   63.44502    0  161   56.00000   63.44502  13.3%     -    0s
     0     0   63.20613    0  161   56.00000   63.20613  12.9%     -    0s
     0     0   63.18157    0  161   56.00000   63.18157  12.8%     -    0s
     0     0   63.18157    0  160   56.00000   63.18157  12.8%     -    0s
     0     2   63.18157    0  159   56.00000   63.18157  12.8%     -    0s
H  108    26                      57.0000000   62.50891  9.66%  42.4    0s
  1018   107   58.55556   17  120   57.00000   59.94118  5.16%  40.2    5s

Cutting planes:
  Gomory: 2
  Zero half: 64

Explored 1492 nodes (54340 simplex iterations) in 5.47 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.700000000000e+01, best bound 5.700000000000e+01, gap 0.0%