Gurobi 5.0.1 (linux64) logging started Mon Feb  4 18:59:31 2013

Optimize a model with 41727 rows, 3969 columns and 127008 nonzeros
Presolve removed 3842 rows and 2022 columns
Presolve time: 0.28s
Presolved: 37885 rows, 1947 columns, 115153 nonzeros
Variable types: 25 continuous, 1922 integer (1922 binary)
Found heuristic solution: objective 82167.000000

Root relaxation: objective 6.180241e+04, 9123 iterations, 0.71 seconds

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

     0     0 61802.4091    0   13 82167.0000 61802.4091  24.8%     -    1s
H    0     0                    61831.000000 61802.4091  0.05%     -    1s
H    0     0                    61823.000000 61802.4091  0.03%     -    1s
H    0     0                    61815.000000 61802.4091  0.02%     -    1s
     0     0 61802.4091    0   20 61815.0000 61802.4091  0.02%     -    1s
     0     0 61802.4091    0    9 61815.0000 61802.4091  0.02%     -    1s
H    0     0                    61812.000000 61802.4091  0.02%     -    1s
     0     0 61802.4091    0   16 61812.0000 61802.4091  0.02%     -    1s
     0     2 61802.4091    0   15 61812.0000 61802.4091  0.02%     -    1s
H    4     3                    61808.000000 61802.4091  0.01%   6.8    2s

Cutting planes:
  MIR: 5

Explored 4 nodes (13810 simplex iterations) in 2.13 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 6.180800000000e+04, best bound 6.180300000000e+04, gap 0.0081%