Gurobi 5.0.1 (linux64) logging started Mon Feb 4 20:47:44 2013 Optimize a model with 818975 rows, 28900 columns and 2470950 nonzeros Presolve removed 22959 rows and 14545 columns (presolve time = 5s) ... Presolve removed 36479 rows and 14595 columns (presolve time = 10s) ... Presolve removed 36479 rows and 14595 columns Presolve time: 12.15s Presolved: 782496 rows, 14305 columns, 2360008 nonzeros Variable types: 75 continuous, 14230 integer (14230 binary) Found heuristic solution: objective 610106.00000 Root simplex log... Iteration Objective Primal Inf. Dual Inf. Time 6750 2.4337870e+05 0.000000e+00 2.650777e+08 5s 17550 2.7086087e+05 0.000000e+00 5.622946e+10 11s 25650 3.4026889e+05 0.000000e+00 1.015618e+09 15s 35100 3.8966086e+05 0.000000e+00 9.512030e+08 20s 45900 4.0244512e+05 0.000000e+00 1.995467e+08 25s 56700 4.1088601e+05 0.000000e+00 7.869730e+08 30s 70220 4.2108631e+05 0.000000e+00 5.697678e+08 35s 83720 4.2837615e+05 0.000000e+00 8.572188e+07 41s 95870 4.3504082e+05 0.000000e+00 6.729937e+07 45s 108020 4.4630140e+05 0.000000e+00 5.727805e+06 50s 116120 4.5308574e+05 0.000000e+00 1.337988e+06 55s 121520 4.5324374e+05 0.000000e+00 2.721757e+05 61s 123059 4.5322382e+05 0.000000e+00 0.000000e+00 64s 123059 4.5322382e+05 0.000000e+00 0.000000e+00 65s Root relaxation: objective 4.532238e+05, 123059 iterations, 64.56 seconds Total elapsed time = 80.89s Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 453223.818 0 12 610106.000 453223.818 25.7% - 83s H 0 0 453237.00000 453223.818 0.00% - 83s Explored 0 nodes (123814 simplex iterations) in 83.60 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.532370000000e+05, best bound 4.532240000000e+05, gap 0.0029%