Gurobi 5.0.1 (linux64) logging started Sat Dec 8 02:35:18 2012 Optimize a model with 285 rows, 270 columns and 881 nonzeros Presolve removed 35 rows and 19 columns Presolve time: 0.00s Presolved: 250 rows, 251 columns, 805 nonzeros Variable types: 164 continuous, 87 integer (87 binary) Root relaxation: objective 2.381554e+04, 134 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 23815.5361 0 46 - 23815.5361 - - 0s H 0 0 39097.000000 23815.5361 39.1% - 0s 0 0 28880.3409 0 32 39097.0000 28880.3409 26.1% - 0s 0 0 29266.7393 0 27 39097.0000 29266.7393 25.1% - 0s 0 0 29310.0187 0 24 39097.0000 29310.0187 25.0% - 0s 0 0 29312.9788 0 18 39097.0000 29312.9788 25.0% - 0s 0 0 29316.7267 0 23 39097.0000 29316.7267 25.0% - 0s 0 2 29319.5535 0 23 39097.0000 29319.5535 25.0% - 0s H 27 27 30799.000000 29320.7146 4.80% 6.3 0s * 79 49 39 30348.000000 29353.6892 3.28% 5.4 0s * 248 120 29 30254.000000 29559.8388 2.29% 5.9 0s * 408 189 34 30228.000000 29597.9403 2.08% 5.7 0s H 556 206 30100.000000 29662.4781 1.45% 5.7 0s Cutting planes: Gomory: 10 Cover: 3 Flow cover: 71 Flow path: 23 Explored 1173 nodes (7629 simplex iterations) in 0.48 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.010000000000e+04, best bound 3.010000000000e+04, gap 0.0%