Gurobi 5.0.1 (linux64) logging started Fri Jan 18 01:01:05 2013 Optimize a model with 1200 rows, 26400 columns and 57950 nonzeros Presolve removed 50 rows and 50 columns Presolve time: 0.08s Presolved: 1150 rows, 26350 columns, 56900 nonzeros Variable types: 26100 continuous, 250 integer (250 binary) Root relaxation: objective 2.198499e+05, 2134 iterations, 0.06 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 219872.711 0 6 - 219872.711 - - 0s 0 0 219878.727 0 6 - 219878.727 - - 0s 0 0 219883.799 0 6 - 219883.799 - - 0s 0 0 219888.355 0 6 - 219888.355 - - 0s 0 0 219888.695 0 6 - 219888.695 - - 0s 0 0 219888.703 0 6 - 219888.703 - - 0s 0 0 219889.765 0 6 - 219889.765 - - 0s 0 0 219891.047 0 8 - 219891.047 - - 0s 0 0 219891.300 0 8 - 219891.300 - - 0s 0 0 219891.300 0 8 - 219891.300 - - 0s 0 0 219891.300 0 8 - 219891.300 - - 0s 0 0 219891.300 0 8 - 219891.300 - - 0s H 0 0 230738.17829 219891.300 4.70% - 0s 0 2 219892.102 0 8 230738.178 219892.102 4.70% - 1s H 27 23 223614.65726 220232.553 1.51% 32.0 1s * 47 34 47 222979.22374 220232.553 1.23% 23.0 2s * 72 44 23 222893.59153 220580.132 1.04% 30.4 2s H 81 40 222669.79385 220802.950 0.84% 32.0 2s * 86 20 15 221986.52168 220802.950 0.53% 31.8 2s Cutting planes: Flow cover: 11 Explored 127 nodes (7988 simplex iterations) in 3.09 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%