Gurobi 5.0.1 (linux64) logging started Fri Jan 18 00:59:21 2013 Optimize a model with 1200 rows, 28550 columns and 66550 nonzeros Presolve removed 50 rows and 1250 columns Presolve time: 0.14s Presolved: 1150 rows, 27300 columns, 64550 nonzeros Variable types: 27050 continuous, 250 integer (250 binary) Root relaxation: objective 2.198499e+05, 1995 iterations, 0.08 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 219849.939 0 6 - 219849.939 - - 0s 0 0 219872.353 0 6 - 219872.353 - - 0s 0 0 219880.585 0 6 - 219880.585 - - 0s 0 0 219881.661 0 6 - 219881.661 - - 0s 0 0 219887.026 0 6 - 219887.026 - - 0s 0 0 219887.026 0 6 - 219887.026 - - 0s 0 0 219889.719 0 6 - 219889.719 - - 0s 0 0 219889.719 0 6 - 219889.719 - - 0s 0 0 219889.917 0 6 - 219889.917 - - 0s 0 0 219890.212 0 6 - 219890.212 - - 0s 0 0 219890.368 0 6 - 219890.368 - - 1s 0 0 219890.368 0 6 - 219890.368 - - 1s 0 0 219890.408 0 6 - 219890.408 - - 1s 0 0 219890.456 0 6 - 219890.456 - - 1s 0 0 219890.456 0 6 - 219890.456 - - 1s H 0 0 230738.17829 219890.456 4.70% - 1s 0 2 219890.477 0 6 230738.178 219890.477 4.70% - 1s H 27 27 223614.65726 220232.553 1.51% 49.3 2s * 54 45 54 222979.22374 220232.553 1.23% 32.2 3s H 85 62 222820.11761 220307.383 1.13% 35.2 4s * 153 40 15 221993.51038 220471.225 0.69% 24.5 4s 172 33 221520.529 11 6 221993.510 220796.408 0.54% 29.2 5s * 249 26 26 221986.52168 221477.805 0.23% 32.6 6s Cutting planes: Flow cover: 11 Explored 291 nodes (13197 simplex iterations) in 6.43 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.219865216793e+05, best bound 2.219654373836e+05, gap 0.0095%