Gurobi 5.0.1 (linux64) logging started Mon Feb  4 18:52:38 2013

Optimize a model with 12383 rows, 1764 columns and 37926 nonzeros
Presolve removed 1317 rows and 895 columns
Presolve time: 0.08s
Presolved: 11066 rows, 869 columns, 33939 nonzeros
Variable types: 19 continuous, 850 integer (850 binary)
Found heuristic solution: objective 42735.000000

Root relaxation: objective 3.198362e+04, 4970 iterations, 0.19 seconds

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

     0     0 31983.6190    0   10 42735.0000 31983.6190  25.2%     -    0s
H    0     0                    32000.000000 31983.6190  0.05%     -    0s
     0     0 31984.1818    0   22 32000.0000 31984.1818  0.05%     -    0s
     0     0 31984.1818    0   11 32000.0000 31984.1818  0.05%     -    0s
H    0     0                    31999.000000 31984.1818  0.05%     -    0s
     0     0 31984.1900    0   23 31999.0000 31984.1900  0.05%     -    0s
H    0     0                    31998.000000 31984.1900  0.04%     -    0s
H    0     0                    31992.000000 31984.1900  0.02%     -    0s
     0     1 31984.1989    0   23 31992.0000 31984.1989  0.02%     -    0s
H    1     1                    31991.000000 31984.1989  0.02%   2.0    0s
H    5     3                    31988.000000 31984.5045  0.01%   0.4    0s

Cutting planes:
  Gomory: 5
  Cover: 1
  Implied bound: 1
  Clique: 1
  MIR: 11
  Zero half: 10

Explored 6 nodes (6594 simplex iterations) in 0.53 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.198800000000e+04, best bound 3.198600000000e+04, gap 0.0063%