Gurobi 5.0.1 (linux64) logging started Mon Feb 4 19:56:58 2013 Optimize a model with 366275 rows, 16900 columns and 1106950 nonzeros Presolve removed 15270 rows and 8518 columns Presolve time: 5.06s Presolved: 351005 rows, 8382 columns, 1059490 nonzeros Variable types: 51 continuous, 8331 integer (8331 binary) Found heuristic solution: objective 401850.00000 Root simplex log... Iteration Objective Primal Inf. Dual Inf. Time 14042 2.7358073e+05 0.000000e+00 2.267114e+09 5s 29736 2.7959147e+05 0.000000e+00 5.651069e+08 10s 52868 2.8951962e+05 0.000000e+00 2.639810e+07 15s 74344 3.0576539e+05 0.000000e+00 9.990131e+05 20s 76795 3.0668236e+05 0.000000e+00 0.000000e+00 21s 76795 3.0668236e+05 0.000000e+00 0.000000e+00 22s Root relaxation: objective 3.066824e+05, 76795 iterations, 21.55 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 306682.362 0 18 401850.000 306682.362 23.7% - 28s H 0 0 306710.00000 306682.362 0.01% - 28s Explored 0 nodes (77118 simplex iterations) in 28.68 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.067100000000e+05, best bound 3.066830000000e+05, gap 0.0088%