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

Optimize a model with 315 rows, 107 columns and 630 nonzeros
Presolve removed 77 rows and 5 columns
Presolve time: 0.00s
Presolved: 238 rows, 102 columns, 505 nonzeros
Variable types: 0 continuous, 102 integer (102 binary)
Found heuristic solution: objective 44.0000000

Root relaxation: objective 4.700000e+01, 142 iterations, 0.00 seconds

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

     0     0   47.00000    0   86   44.00000   47.00000  6.82%     -    0s
     0     0   46.40000    0   89   44.00000   46.40000  5.45%     -    0s
     0     0   46.00000    0   86   44.00000   46.00000  4.55%     -    0s
     0     0   45.33333    0   86   44.00000   45.33333  3.03%     -    0s
     0     0   45.17647    0   97   44.00000   45.17647  2.67%     -    0s
     0     0     cutoff    0        44.00000   44.99995  2.27%     -    0s

Cutting planes:
  Gomory: 1
  Zero half: 90

Explored 0 nodes (428 simplex iterations) in 0.02 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.400000000000e+01, best bound 4.400000000000e+01, gap 0.0%