Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:47:49 2012

Optimize a model with 660 rows, 163 columns and 1320 nonzeros
Presolve removed 152 rows and 3 columns
Presolve time: 0.00s
Presolved: 508 rows, 160 columns, 1098 nonzeros
Variable types: 0 continuous, 160 integer (160 binary)
Found heuristic solution: objective 53.0000000

Root relaxation: objective 6.654412e+01, 341 iterations, 0.01 seconds

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

     0     0   66.54412    0  154   53.00000   66.54412  25.6%     -    0s
     0     0   65.51613    0  158   53.00000   65.51613  23.6%     -    0s
     0     0   64.57391    0  157   53.00000   64.57391  21.8%     -    0s
     0     0   63.98809    0  157   53.00000   63.98809  20.7%     -    0s
     0     0   63.62295    0  157   53.00000   63.62295  20.0%     -    0s
     0     0   63.01927    0  155   53.00000   63.01927  18.9%     -    0s
     0     0   62.71448    0  157   53.00000   62.71448  18.3%     -    0s
     0     0   62.56001    0  159   53.00000   62.56001  18.0%     -    0s
     0     0   62.52126    0  160   53.00000   62.52126  18.0%     -    0s
     0     0   62.49777    0  160   53.00000   62.49777  17.9%     -    0s
     0     0   62.49777    0  158   53.00000   62.49777  17.9%     -    0s
     0     2   62.49771    0  158   53.00000   62.49771  17.9%     -    0s
H    7     7                      54.0000000   62.49771  15.7%  67.7    0s
H   16    11                      55.0000000   62.49771  13.6%  36.0    0s
*  193    61              18      56.0000000   61.20312  9.29%  35.5    0s

Cutting planes:
  Gomory: 3
  Clique: 1
  Zero half: 57

Explored 1909 nodes (61246 simplex iterations) in 4.83 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.600000000000e+01, best bound 5.600000000000e+01, gap 0.0%