Gurobi 5.0.1 (linux64) logging started Fri Jan 18 01:49:50 2013

Optimize a model with 3200 rows, 32600 columns and 70050 nonzeros
Presolve removed 100 rows and 150 columns
Presolve time: 0.48s
Presolved: 3100 rows, 32450 columns, 64900 nonzeros
Variable types: 30000 continuous, 2450 integer (2450 binary)

Root relaxation: objective 1.749223e+05, 3062 iterations, 0.23 seconds

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

     0     0 174922.321    0    2          - 174922.321     -      -    0s
     0     0 174936.636    0    2          - 174936.636     -      -    0s
     0     0 174940.194    0    2          - 174940.194     -      -    1s
     0     0 174943.651    0    2          - 174943.651     -      -    1s
     0     0 174944.584    0    2          - 174944.584     -      -    1s
     0     0 174947.162    0    2          - 174947.162     -      -    1s
     0     0 174947.162    0    2          - 174947.162     -      -    1s
     0     0 174947.162    0    2          - 174947.162     -      -    1s
     0     0 174947.314    0    2          - 174947.314     -      -    1s
     0     0 174947.314    0    2          - 174947.314     -      -    1s
H    0     0                    182707.97026 174947.314  4.25%     -    2s
     0     2 174949.654    0    2 182707.970 174949.654  4.25%     -    2s
H   81    79                    178752.46200 175131.753  2.03%  13.2    4s
   100    94 175479.239  100    2 178752.462 175131.753  2.03%  13.2    5s
H  270    73                    176468.40932 175131.753  0.76%  11.1    9s
   293    74 175997.702  293    1 176468.409 175131.753  0.76%  11.1   10s
H  324    69                    176277.94093 175131.753  0.65%  11.4   10s
*  350    71             350    176271.26267 175131.753  0.65%  11.6   11s
   603   127 175968.691   61    2 176271.263 175642.499  0.36%  17.9   15s
   738   134 175642.499  115    1 176271.263 175642.499  0.36%  24.0   20s
H  852    90                    176253.02075 175642.499  0.35%  22.4   22s
*  868    69             234    176210.35534 175642.499  0.32%  22.2   22s
  1020    57 175642.499   56    2 176210.355 175642.499  0.32%  21.7   25s
  1400    75     cutoff  127      176210.355 175642.499  0.32%  22.3   30s
  1745   160 176023.063   38    1 176210.355 175914.310  0.17%  23.8   35s
  2115   126 176166.413   32    1 176210.355 176042.620  0.10%  23.7   40s
  2394    38 176203.577   43    1 176210.355 176149.773  0.03%  23.9   46s

Cutting planes:
  Gomory: 1
  Flow cover: 10

Explored 2435 nodes (61339 simplex iterations) in 46.80 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.762103553441e+05, best bound 1.761928741866e+05, gap 0.0099%