Gurobi 5.0.1 (linux64) logging started Tue Nov 20 13:13:52 2012

Optimize a model with 759 rows, 175 columns and 1518 nonzeros
Presolve removed 178 rows and 1 columns
Presolve time: 0.00s
Presolved: 581 rows, 174 columns, 1277 nonzeros
Variable types: 0 continuous, 174 integer (174 binary)
Found heuristic solution: objective 48.0000000

Root relaxation: objective 7.050000e+01, 296 iterations, 0.01 seconds

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

     0     0   70.50000    0  129   48.00000   70.50000  46.9%     -    0s
     0     0   69.31285    0  167   48.00000   69.31285  44.4%     -    0s
H    0     0                      51.0000000   69.31285  35.9%     -    0s
     0     0   68.66667    0  172   51.00000   68.66667  34.6%     -    0s
H    0     0                      52.0000000   68.66667  32.1%     -    0s
     0     0   67.92130    0  172   52.00000   67.92130  30.6%     -    0s
     0     0   67.52326    0  172   52.00000   67.52326  29.9%     -    0s
     0     0   67.32179    0  172   52.00000   67.32179  29.5%     -    0s
     0     0   67.08259    0  173   52.00000   67.08259  29.0%     -    0s
     0     0   66.83115    0  173   52.00000   66.83115  28.5%     -    0s
     0     0   66.67732    0  172   52.00000   66.67732  28.2%     -    0s
     0     0   66.52964    0  171   52.00000   66.52964  27.9%     -    0s
     0     0   66.38721    0  171   52.00000   66.38721  27.7%     -    0s
     0     0   66.08818    0  173   52.00000   66.08818  27.1%     -    0s
     0     0   66.02434    0  172   52.00000   66.02434  27.0%     -    0s
     0     0   66.00283    0  172   52.00000   66.00283  26.9%     -    0s
     0     0   66.00283    0  172   52.00000   66.00283  26.9%     -    0s
H    0     0                      55.0000000   66.00283  20.0%     -    0s
     0     2   66.00063    0  172   55.00000   66.00063  20.0%     -    0s
*   38    27              11      56.0000000   65.74811  17.4%  56.2    0s
*  107    53              20      57.0000000   65.30324  14.6%  52.1    0s
*  497   192              21      58.0000000   63.35802  9.24%  43.4    1s
   779   295   60.57143   21  124   58.00000   63.09208  8.78%  49.6    5s

Cutting planes:
  Gomory: 8
  Zero half: 64

Explored 4739 nodes (144362 simplex iterations) in 9.79 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.800000000000e+01, best bound 5.800000000000e+01, gap 0.0%