Gurobi 5.0.1 (linux64) logging started Wed Dec 19 14:01:37 2012 Optimize a model with 902 rows, 840 columns and 3640 nonzeros Presolve removed 137 rows and 40 columns Presolve time: 0.02s Presolved: 765 rows, 800 columns, 3404 nonzeros Variable types: 380 continuous, 420 integer (420 binary) Root relaxation: objective 2.143861e+02, 745 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 214.38607 0 36 - 214.38607 - - 0s 0 0 259.53251 0 38 - 259.53251 - - 0s 0 0 268.24589 0 48 - 268.24589 - - 0s 0 0 276.23013 0 48 - 276.23013 - - 0s 0 0 280.15051 0 51 - 280.15051 - - 0s 0 0 281.92230 0 45 - 281.92230 - - 0s 0 0 282.89379 0 40 - 282.89379 - - 0s 0 0 283.02643 0 39 - 283.02643 - - 0s 0 0 283.16037 0 37 - 283.16037 - - 0s 0 0 283.16062 0 37 - 283.16062 - - 0s 0 0 283.16062 0 34 - 283.16062 - - 0s 0 2 283.18670 0 34 - 283.18670 - - 0s * 654 296 31 358.0000000 306.36870 14.4% 52.4 2s * 787 282 25 335.0000000 306.36870 8.55% 53.6 2s * 808 261 30 333.0000000 306.36870 8.00% 53.4 2s * 809 245 28 331.0000000 306.36870 7.44% 53.4 2s H 849 214 323.0000000 306.36870 5.15% 53.8 2s H 989 114 320.0000000 314.73157 1.65% 51.8 3s Cutting planes: Gomory: 6 Cover: 6 Flow cover: 19 GUB cover: 3 Explored 1010 nodes (53199 simplex iterations) in 3.17 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.200000000000e+02, best bound 3.200000000000e+02, gap 0.0%