Gurobi 5.0.1 (linux64) logging started Sat Dec 8 02:35:19 2012 Optimize a model with 285 rows, 270 columns and 889 nonzeros Presolve removed 37 rows and 25 columns Presolve time: 0.00s Presolved: 248 rows, 245 columns, 793 nonzeros Variable types: 164 continuous, 81 integer (81 binary) Root relaxation: objective 2.746112e+04, 130 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 27461.1216 0 40 - 27461.1216 - - 0s H 0 0 41041.000000 27461.1216 33.1% - 0s 0 0 31175.1199 0 22 41041.0000 31175.1199 24.0% - 0s H 0 0 32676.000000 31175.1199 4.59% - 0s 0 0 31486.4989 0 18 32676.0000 31486.4989 3.64% - 0s 0 0 31568.2464 0 18 32676.0000 31568.2464 3.39% - 0s 0 0 31576.0904 0 17 32676.0000 31576.0904 3.37% - 0s 0 0 31578.0086 0 19 32676.0000 31578.0086 3.36% - 0s 0 2 31580.7041 0 19 32676.0000 31580.7041 3.35% - 0s * 38 34 33 32284.000000 31582.9906 2.17% 3.9 0s * 134 91 30 32276.000000 31602.1158 2.09% 4.5 0s * 483 263 21 32223.000000 31741.8368 1.49% 4.8 0s H 609 232 32134.000000 31774.7738 1.12% 5.0 0s H 761 243 32130.000000 31891.7264 0.74% 5.4 0s H 843 206 32127.000000 31936.4931 0.59% 5.5 0s * 916 177 31 32069.000000 31958.5313 0.34% 5.5 0s H 1093 60 32067.000000 32052.6506 0.04% 5.3 0s Cutting planes: Gomory: 9 Flow cover: 65 Flow path: 31 Explored 1110 nodes (6034 simplex iterations) in 0.38 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.206700000000e+04, best bound 3.206399117128e+04, gap 0.0094%