Gurobi 5.0.1 (linux64) logging started Sat Dec 8 02:35:52 2012 Optimize a model with 285 rows, 270 columns and 891 nonzeros Presolve removed 34 rows and 22 columns Presolve time: 0.00s Presolved: 251 rows, 248 columns, 804 nonzeros Variable types: 169 continuous, 79 integer (79 binary) Root relaxation: objective 3.086801e+04, 135 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 30868.0111 0 41 - 30868.0111 - - 0s 0 0 34508.6248 0 22 - 34508.6248 - - 0s 0 0 34690.6277 0 17 - 34690.6277 - - 0s 0 0 34760.2579 0 22 - 34760.2579 - - 0s 0 0 34786.1935 0 16 - 34786.1935 - - 0s 0 2 34789.2255 0 16 - 34789.2255 - - 0s H 29 23 37830.000000 34818.5055 7.96% 6.7 0s H 29 23 37048.000000 34818.5055 6.02% 6.7 0s H 291 110 37029.000000 35893.0373 3.07% 7.0 1s H 386 106 36758.000000 35922.5120 2.27% 6.8 1s * 398 100 26 36683.000000 35922.5120 2.07% 6.7 1s H 600 102 36467.000000 36022.3759 1.22% 6.5 3s H 671 98 36434.000000 36086.2394 0.95% 7.4 4s Cutting planes: Gomory: 6 Implied bound: 1 Flow cover: 7 Explored 771 nodes (5826 simplex iterations) in 4.70 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.643400000000e+04, best bound 3.643108692165e+04, gap 0.0080%