Gurobi 5.0.1 (linux64) logging started Mon Feb  4 16:01:15 2013

Optimize a model with 84 rows, 64 columns and 224 nonzeros
Presolve removed 28 rows and 28 columns
Presolve time: 0.00s
Presolved: 56 rows, 36 columns, 168 nonzeros
Variable types: 8 continuous, 28 integer (28 binary)
Found heuristic solution: objective 1884.0000000

Root relaxation: objective 4.230000e+02, 18 iterations, 0.00 seconds

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

     0     0  423.00000    0   11 1884.00000  423.00000  77.5%     -    0s
     0     0  631.86190    0    9 1884.00000  631.86190  66.5%     -    0s
     0     0  633.80043    0   13 1884.00000  633.80043  66.4%     -    0s
     0     2  638.68453    0   13 1884.00000  638.68453  66.1%     -    0s
*   21    21              13    1316.0000000  689.06011  47.6%   2.8    0s
*  100    66              11    1272.0000000  759.33559  40.3%   3.3    0s
H  281   104                    1225.0000000  790.00000  35.5%   2.7    0s
*  584   140               7    1214.0000000  916.46154  24.5%   2.5    0s

Cutting planes:
  Gomory: 11
  Implied bound: 2
  MIR: 6

Explored 2062 nodes (5142 simplex iterations) in 0.12 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.214000000000e+03, best bound 1.214000000000e+03, gap 0.0%