Gurobi 5.0.1 (linux64) logging started Mon Feb  4 20:46:09 2013

Optimize a model with 818975 rows, 28900 columns and 2470950 nonzeros
Presolve removed 23746 rows and 14540 columns (presolve time = 5s) ...
Presolve removed 30546 rows and 14574 columns (presolve time = 10s) ...
Presolve removed 33157 rows and 14587 columns
Presolve time: 13.30s
Presolved: 785818 rows, 14313 columns, 2367641 nonzeros
Variable types: 61 continuous, 14252 integer (14252 binary)
Found heuristic solution: objective 683875.00000

Root simplex log...

Iteration    Objective       Primal Inf.    Dual Inf.      Time
    6750    4.6990133e+05   0.000000e+00   6.472336e+09      6s
   14850    4.7536430e+05   0.000000e+00   5.489229e+09     10s
   24300    4.7892040e+05   0.000000e+00   9.770663e+07     15s
   36450    4.8555645e+05   0.000000e+00   3.908708e+08     20s
   49950    4.9542935e+05   0.000000e+00   1.389821e+08     25s
   64800    5.0178670e+05   0.000000e+00   1.559119e+08     30s
   79650    5.0841829e+05   0.000000e+00   1.824942e+07     35s
   93150    5.1872606e+05   0.000000e+00   4.056939e+06     40s
  103950    5.2588037e+05   0.000000e+00   8.926798e+06     46s
  109251    5.2637083e+05   0.000000e+00   0.000000e+00     52s
  109251    5.2637083e+05   0.000000e+00   0.000000e+00     52s

Root relaxation: objective 5.263708e+05, 109251 iterations, 52.43 seconds
Total elapsed time = 70.06s

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

     0     0 526370.833    0   20 683875.000 526370.833  23.0%     -   73s
H    0     0                    526419.00000 526370.833  0.01%     -   73s

Explored 0 nodes (110228 simplex iterations) in 73.44 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.264190000000e+05, best bound 5.263710000000e+05, gap 0.0091%