Gurobi 5.0.1 (linux64) logging started Tue Dec 25 15:26:57 2012 Optimize a model with 902 rows, 840 columns and 3580 nonzeros Presolve removed 194 rows and 40 columns Presolve time: 0.03s Presolved: 708 rows, 800 columns, 3286 nonzeros Variable types: 380 continuous, 420 integer (420 binary) Root relaxation: objective 1.525515e+02, 742 iterations, 0.02 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 152.55152 0 37 - 152.55152 - - 0s 0 0 155.04030 0 39 - 155.04030 - - 0s 0 0 158.26328 0 38 - 158.26328 - - 0s 0 0 161.21297 0 42 - 161.21297 - - 0s 0 0 166.45020 0 38 - 166.45020 - - 0s 0 0 167.11627 0 41 - 167.11627 - - 0s 0 0 167.13543 0 46 - 167.13543 - - 0s 0 0 167.21053 0 48 - 167.21053 - - 0s 0 0 167.21053 0 48 - 167.21053 - - 0s 0 2 167.23468 0 44 - 167.23468 - - 0s * 719 412 61 235.0000000 173.13437 26.3% 40.8 2s H 900 382 229.0000000 174.97014 23.6% 45.5 3s 1001 403 184.62209 25 33 229.00000 174.97014 23.6% 47.3 5s H 1020 391 227.0000000 178.30224 21.5% 47.8 5s H 3446 1281 225.0000000 193.54235 14.0% 36.7 9s 4186 1573 221.47776 50 33 225.00000 194.98934 13.3% 35.3 10s 7771 2315 223.13912 48 29 225.00000 201.26854 10.5% 33.1 15s 11366 1829 212.78326 33 46 225.00000 208.25580 7.44% 32.8 20s Cutting planes: Gomory: 13 Cover: 9 Implied bound: 88 Flow cover: 56 GUB cover: 5 Explored 14365 nodes (453576 simplex iterations) in 23.13 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.250000000000e+02, best bound 2.250000000000e+02, gap 0.0%