Gurobi 5.0.1 (linux64) logging started Mon Feb 4 20:21:39 2013 Optimize a model with 562625 rows, 22500 columns and 1698750 nonzeros Presolve removed 18013 rows and 11299 columns (presolve time = 5s) ... Presolve removed 19893 rows and 11305 columns Presolve time: 8.33s Presolved: 542732 rows, 11195 columns, 1639798 nonzeros Variable types: 79 continuous, 11116 integer (11116 binary) Found heuristic solution: objective 450293.00000 Root simplex log... Iteration Objective Primal Inf. Dual Inf. Time 8576 2.4694908e+05 0.000000e+00 7.118018e+09 6s 16080 2.4845322e+05 0.000000e+00 3.893918e+09 11s 22512 2.5111996e+05 0.000000e+00 6.144942e+09 15s 30016 2.5242402e+05 0.000000e+00 1.559977e+09 20s 39664 2.5655109e+05 0.000000e+00 3.740552e+09 25s 49312 2.6055541e+05 0.000000e+00 9.128323e+08 30s 61104 2.6432116e+05 0.000000e+00 7.141813e+08 35s 72896 2.6667642e+05 0.000000e+00 1.861003e+09 40s 86845 2.7028233e+05 0.000000e+00 4.229884e+08 45s 98642 2.7495122e+05 0.000000e+00 4.470455e+08 50s 113678 2.8063083e+05 0.000000e+00 2.608125e+08 55s 130831 2.8617035e+05 0.000000e+00 2.668991e+08 60s 146916 2.9251378e+05 0.000000e+00 4.871808e+08 65s 163052 3.0260787e+05 0.000000e+00 1.066226e+07 70s 173498 3.1177935e+05 1.488095e-03 0.000000e+00 76s 173499 3.1177935e+05 0.000000e+00 0.000000e+00 76s 173499 3.1177935e+05 0.000000e+00 0.000000e+00 76s Root relaxation: objective 3.117793e+05, 173499 iterations, 76.31 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 311779.349 0 17 450293.000 311779.349 30.8% - 88s H 0 0 311796.00000 311779.349 0.01% - 88s Explored 0 nodes (173714 simplex iterations) in 88.83 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.117960000000e+05, best bound 3.117800000000e+05, gap 0.0051%