Gurobi 5.0.1 (linux64) logging started Fri Jan 18 01:00:25 2013

Optimize a model with 1800 rows, 27150 columns and 57250 nonzeros
Presolve removed 50 rows and 50 columns
Presolve time: 0.17s
Presolved: 1750 rows, 27100 columns, 56200 nonzeros
Variable types: 26100 continuous, 1000 integer (1000 binary)

Root relaxation: objective 1.749223e+05, 2473 iterations, 0.08 seconds

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

     0     0 174922.321    0    4          - 174922.321     -      -    0s
H    0     0                    183439.49743 174922.321  4.64%     -    0s
     0     0 174951.684    0    4 183439.497 174951.684  4.63%     -    0s
     0     0 174953.951    0    4 183439.497 174953.951  4.63%     -    0s
     0     0 174959.107    0    2 183439.497 174959.107  4.62%     -    0s
     0     0 174959.107    0    2 183439.497 174959.107  4.62%     -    0s
     0     2 174959.107    0    2 183439.497 174959.107  4.62%     -    1s
*   23    11              12    176767.92131 175420.983  0.76%  79.3    1s
*   81    14              64    176627.38221 175420.983  0.68%  33.4    3s
H  111    21                    176622.81492 175641.252  0.56%  32.9    3s
*  132    13              28    176501.49025 175641.252  0.49%  28.2    3s
H  166     7                    176230.44114 176131.784  0.06%  27.6    4s
*  184     0              20    176208.61401 176208.614   0.0%  25.1    4s

Cutting planes:
  Implied bound: 24
  Flow cover: 5

Explored 185 nodes (7731 simplex iterations) in 4.31 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.762086140087e+05, best bound 1.762086140087e+05, gap 0.0%