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 1590.0000000

Root relaxation: objective 3.740000e+02, 21 iterations, 0.00 seconds

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

     0     0  374.00000    0   12 1590.00000  374.00000  76.5%     -    0s
     0     0  534.42261    0    9 1590.00000  534.42261  66.4%     -    0s
     0     0  534.42261    0    9 1590.00000  534.42261  66.4%     -    0s
     0     2  550.02291    0    9 1590.00000  550.02291  65.4%     -    0s
*   14    12               8     785.0000000  592.90382  24.5%   3.8    0s
*   16     9               9     777.0000000  592.90382  23.7%   3.4    0s
H   27     8                     770.0000000  601.00000  21.9%   3.3    0s

Cutting planes:
  Implied bound: 7
  MIR: 13

Explored 77 nodes (226 simplex iterations) in 0.01 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 7.699999999998e+02, best bound 7.699999999998e+02, gap 0.0%