Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:25 2012

Optimize a model with 401 rows, 121 columns and 802 nonzeros
Presolve removed 67 rows and 0 columns
Presolve time: 0.00s
Presolved: 334 rows, 121 columns, 709 nonzeros
Variable types: 0 continuous, 121 integer (121 binary)
Found heuristic solution: objective 42.0000000

Root relaxation: objective 5.200000e+01, 168 iterations, 0.00 seconds

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

     0     0   52.00000    0   86   42.00000   52.00000  23.8%     -    0s
     0     0   51.16667    0  106   42.00000   51.16667  21.8%     -    0s
H    0     0                      44.0000000   51.16667  16.3%     -    0s
     0     0   50.66667    0  100   44.00000   50.66667  15.2%     -    0s
     0     0   50.14286    0  110   44.00000   50.14286  14.0%     -    0s
     0     0   49.40984    0  109   44.00000   49.40984  12.3%     -    0s
     0     0   49.05556    0  111   44.00000   49.05556  11.5%     -    0s
     0     0   48.91812    0  117   44.00000   48.91812  11.2%     -    0s
     0     0   48.78571    0  118   44.00000   48.78571  10.9%     -    0s
     0     0   48.70661    0  119   44.00000   48.70661  10.7%     -    0s
     0     0   48.70367    0  118   44.00000   48.70367  10.7%     -    0s
     0     0   48.68156    0  120   44.00000   48.68156  10.6%     -    0s
     0     0   48.68156    0  119   44.00000   48.68156  10.6%     -    0s
H    0     0                      45.0000000   48.68156  8.18%     -    0s
     0     2   48.67957    0  119   45.00000   48.67957  8.18%     -    0s
*    9     7               6      46.0000000   48.67957  5.83%  32.0    0s

Cutting planes:
  Gomory: 1
  Zero half: 83

Explored 62 nodes (2431 simplex iterations) in 0.12 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.600000000000e+01, best bound 4.600000000000e+01, gap 0.0%