Gurobi 5.0.1 (linux64) logging started Fri Jan 18 02:50:10 2013 Optimize a model with 560 rows, 9300 columns and 48300 nonzeros Presolve removed 20 rows and 1140 columns Presolve time: 0.07s Presolved: 540 rows, 8160 columns, 44300 nonzeros Variable types: 8020 continuous, 140 integer (140 binary) Root relaxation: objective 3.709539e+04, 428 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 37095.3933 0 16 - 37095.3933 - - 0s 0 0 37096.9613 0 12 - 37096.9613 - - 0s 0 0 37097.0364 0 12 - 37097.0364 - - 0s 0 0 37097.0369 0 12 - 37097.0369 - - 0s 0 0 37097.4370 0 12 - 37097.4370 - - 0s 0 0 37097.4370 0 12 - 37097.4370 - - 0s 0 0 37097.4370 0 12 - 37097.4370 - - 0s 0 0 37097.4725 0 12 - 37097.4725 - - 0s 0 0 37097.4725 0 12 - 37097.4725 - - 0s 0 0 37097.4725 0 12 - 37097.4725 - - 0s 0 2 37100.9398 0 12 - 37100.9398 - - 1s * 46 35 37 37310.618579 37120.9228 0.51% 8.6 1s * 62 34 13 37304.071873 37125.8867 0.48% 8.6 1s * 91 22 10 37258.192485 37158.3630 0.27% 7.6 1s H 103 20 37257.246271 37160.0210 0.26% 7.4 1s * 125 13 9 37256.487285 37240.6894 0.04% 7.7 1s * 154 11 9 37255.868475 37248.6787 0.02% 6.9 1s * 166 12 10 37253.494208 37248.7978 0.01% 6.6 1s Cutting planes: Flow cover: 11 Explored 186 nodes (2314 simplex iterations) in 1.58 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.725349420845e+04, best bound 3.725007973904e+04, gap 0.0092%