Gurobi 5.0.1 (linux64) logging started Wed Dec 19 18:32:09 2012

Optimize a model with 3722 rows, 3721 columns and 16596 nonzeros
Presolve removed 3346 rows and 2567 columns
Presolve time: 0.07s
Presolved: 376 rows, 1154 columns, 4234 nonzeros
Variable types: 52 continuous, 1102 integer (1102 binary)

Root relaxation: objective 5.047540e+02, 192 iterations, 0.00 seconds

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

     0     0  504.75398    0   52          -  504.75398     -      -    0s
     0     0  517.43937    0   77          -  517.43937     -      -    0s
     0     0  518.56776    0   61          -  518.56776     -      -    0s
     0     0  519.66942    0   78          -  519.66942     -      -    0s
     0     0  520.37108    0   81          -  520.37108     -      -    0s
     0     0  520.51414    0   72          -  520.51414     -      -    0s
     0     0  520.84747    0   62          -  520.84747     -      -    0s
     0     0  520.94271    0   80          -  520.94271     -      -    0s
     0     0  520.94271    0   80          -  520.94271     -      -    0s
     0     0  521.27605    0   69          -  521.27605     -      -    0s
     0     0  521.27605    0   69          -  521.27605     -      -    0s
     0     2  521.44747    0   67          -  521.44747     -      -    0s
*  110    39              20     536.0000000  525.17234  2.02%  10.4    0s
H  113    26                     533.0000000  525.17234  1.47%  10.1    0s
*  190    27              13     532.0000000  527.03213  0.93%  10.0    0s

Cutting planes:
  Learned: 3
  Gomory: 2
  Cover: 35
  Implied bound: 34
  Clique: 4
  MIR: 19
  GUB cover: 3
  Zero half: 4
  Mod-K: 4

Explored 241 nodes (2607 simplex iterations) in 0.49 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.320000000000e+02, best bound 5.320000000000e+02, gap 0.0%