Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:16 2012

Optimize a model with 336 rows, 111 columns and 672 nonzeros
Presolve removed 55 rows and 0 columns
Presolve time: 0.00s
Presolved: 281 rows, 111 columns, 600 nonzeros
Variable types: 0 continuous, 111 integer (111 binary)
Found heuristic solution: objective 42.0000000

Root relaxation: objective 4.975000e+01, 151 iterations, 0.00 seconds

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

     0     0   49.75000    0   88   42.00000   49.75000  18.5%     -    0s
H    0     0                      45.0000000   49.75000  10.6%     -    0s
     0     0   48.16667    0   94   45.00000   48.16667  7.04%     -    0s
     0     0   47.53947    0  101   45.00000   47.53947  5.64%     -    0s
     0     0   47.15000    0   97   45.00000   47.15000  4.78%     -    0s
     0     0   46.88281    0   99   45.00000   46.88281  4.18%     -    0s
     0     0   46.50222    0  108   45.00000   46.50222  3.34%     -    0s
     0     0   46.42259    0  107   45.00000   46.42259  3.16%     -    0s
     0     0   46.36391    0  109   45.00000   46.36391  3.03%     -    0s
     0     0   46.26230    0  110   45.00000   46.26230  2.81%     -    0s
     0     0   46.19598    0  110   45.00000   46.19598  2.66%     -    0s
     0     0   46.11821    0  107   45.00000   46.11821  2.48%     -    0s
     0     0     cutoff    0        45.00000   45.99995  2.22%     -    0s

Cutting planes:
  Gomory: 1
  Zero half: 55

Explored 0 nodes (639 simplex iterations) in 0.04 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%