Gurobi 5.0.1 (linux64) logging started Fri Jan 18 00:56:33 2013 Optimize a model with 2700 rows, 27100 columns and 58050 nonzeros Presolve removed 150 rows and 100 columns Presolve time: 0.31s Presolved: 2550 rows, 27000 columns, 55900 nonzeros Variable types: 26050 continuous, 950 integer (950 binary) Root relaxation: objective 2.198499e+05, 4106 iterations, 0.31 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 219849.939 0 2 - 219849.939 - - 0s 0 0 219872.353 0 2 - 219872.353 - - 0s 0 0 219881.304 0 2 - 219881.304 - - 0s 0 0 219885.085 0 2 - 219885.085 - - 0s 0 0 219885.085 0 2 - 219885.085 - - 1s 0 0 219891.345 0 2 - 219891.345 - - 1s 0 0 219891.345 0 2 - 219891.345 - - 1s 0 0 219893.410 0 2 - 219893.410 - - 1s 0 0 219895.085 0 2 - 219895.085 - - 1s H 0 0 230738.17829 219895.085 4.70% - 1s 0 2 219902.377 0 2 230738.178 219902.377 4.70% - 1s 46 48 221049.358 46 4 230738.178 220447.704 4.46% 31.9 5s H 81 73 223614.65726 220447.704 1.42% 27.3 7s H 141 70 222609.06307 220447.704 0.97% 23.9 9s 142 67 222381.068 142 1 222609.063 220447.704 0.97% 23.9 10s 374 181 221878.507 17 1 222609.063 221189.043 0.64% 39.4 15s * 583 267 39 222561.00672 221342.476 0.55% 39.0 18s 687 303 222153.282 4 2 222561.007 221436.156 0.51% 38.6 20s H 698 148 222082.15511 221438.508 0.29% 38.7 20s * 699 117 14 221990.08222 221438.508 0.25% 38.8 20s 992 9 221968.394 12 1 221990.082 221968.394 0.01% 35.8 25s Cutting planes: Flow cover: 8 Explored 993 nodes (39702 simplex iterations) in 25.00 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.219900822228e+05, best bound 2.219683936280e+05, gap 0.0098%