Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:15 2012

Optimize a model with 314 rows, 111 columns and 628 nonzeros
Presolve removed 56 rows and 1 columns
Presolve time: 0.00s
Presolved: 258 rows, 110 columns, 550 nonzeros
Variable types: 0 continuous, 110 integer (110 binary)
Found heuristic solution: objective 42.0000000

Root relaxation: objective 4.875000e+01, 197 iterations, 0.00 seconds

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

     0     0   48.75000    0   93   42.00000   48.75000  16.1%     -    0s
H    0     0                      44.0000000   48.75000  10.8%     -    0s
     0     0   47.70000    0  105   44.00000   47.70000  8.41%     -    0s
     0     0   46.88235    0  105   44.00000   46.88235  6.55%     -    0s
     0     0   46.83108    0  109   44.00000   46.83108  6.43%     -    0s
     0     0   46.45614    0  109   44.00000   46.45614  5.58%     -    0s
     0     0   46.42045    0  108   44.00000   46.42045  5.50%     -    0s
     0     0   46.27559    0  108   44.00000   46.27559  5.17%     -    0s
     0     0   46.17485    0  108   44.00000   46.17485  4.94%     -    0s
     0     0   46.15000    0  107   44.00000   46.15000  4.89%     -    0s
     0     0   46.13918    0  107   44.00000   46.13918  4.86%     -    0s
     0     0   46.13918    0  107   44.00000   46.13918  4.86%     -    0s
     0     2   46.13717    0  107   44.00000   46.13717  4.86%     -    0s
*   20     0               4      45.0000000   45.00000   0.0%  29.0    0s

Cutting planes:
  Gomory: 2
  Zero half: 52

Explored 21 nodes (1246 simplex iterations) in 0.07 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.500000000000e+01, best bound 4.500000000000e+01, gap 0.0%