Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:22 2012

Optimize a model with 355 rows, 119 columns and 710 nonzeros
Presolve removed 55 rows and 2 columns
Presolve time: 0.00s
Presolved: 300 rows, 117 columns, 627 nonzeros
Variable types: 0 continuous, 117 integer (117 binary)
Found heuristic solution: objective 40.0000000

Root relaxation: objective 5.300000e+01, 145 iterations, 0.00 seconds

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

     0     0   53.00000    0   96   40.00000   53.00000  32.5%     -    0s
     0     0   51.57143    0  110   40.00000   51.57143  28.9%     -    0s
     0     0   50.74468    0  116   40.00000   50.74468  26.9%     -    0s
H    0     0                      42.0000000   50.74468  20.8%     -    0s
     0     0   50.30769    0  116   42.00000   50.30769  19.8%     -    0s
H    0     0                      44.0000000   50.30769  14.3%     -    0s
     0     0   49.49167    0  116   44.00000   49.49167  12.5%     -    0s
     0     0   49.27587    0  117   44.00000   49.27587  12.0%     -    0s
H    0     0                      45.0000000   49.27587  9.50%     -    0s
     0     0   49.24232    0  116   45.00000   49.24232  9.43%     -    0s
H    0     0                      46.0000000   49.24232  7.05%     -    0s
     0     0   49.18905    0  116   46.00000   49.18905  6.93%     -    0s
     0     0   49.17593    0  116   46.00000   49.17593  6.90%     -    0s
     0     0   49.17593    0  114   46.00000   49.17593  6.90%     -    0s
     0     2   49.17593    0  114   46.00000   49.17593  6.90%     -    0s

Cutting planes:
  Gomory: 3
  Zero half: 82

Explored 62 nodes (2516 simplex iterations) in 0.11 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%