Gurobi 5.0.1 (linux64) logging started Tue Dec 25 15:33:02 2012 Optimize a model with 902 rows, 840 columns and 3500 nonzeros Presolve removed 270 rows and 40 columns Presolve time: 0.02s Presolved: 632 rows, 800 columns, 3136 nonzeros Variable types: 380 continuous, 420 integer (420 binary) Root relaxation: objective 1.396716e+02, 575 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 139.67161 0 37 - 139.67161 - - 0s 0 0 156.26711 0 45 - 156.26711 - - 0s 0 0 158.19790 0 50 - 158.19790 - - 0s 0 0 158.82153 0 50 - 158.82153 - - 0s 0 0 158.82268 0 51 - 158.82268 - - 0s 0 2 158.85548 0 51 - 158.85548 - - 0s H 957 425 288.0000000 169.48273 41.2% 57.8 3s 1113 471 180.34367 28 46 288.00000 174.19350 39.5% 59.1 5s H 1338 467 286.0000000 177.58710 37.9% 59.4 6s H 1365 448 282.0000000 177.66775 37.0% 59.3 6s H 1499 444 280.0000000 181.21292 35.3% 57.7 6s H 1621 439 278.0000000 181.86607 34.6% 57.5 6s * 1822 477 64 277.0000000 183.52325 33.7% 56.1 7s H 1877 429 270.0000000 184.65858 31.6% 55.7 7s H 2785 692 249.0000000 196.17418 21.2% 53.2 9s 3084 852 226.79004 42 19 249.00000 198.68843 20.2% 51.4 10s 6175 1771 233.80119 42 30 249.00000 211.74748 15.0% 46.4 15s 9444 2427 cutoff 46 249.00000 217.76972 12.5% 43.7 20s 12878 2691 cutoff 36 249.00000 223.45219 10.3% 42.7 25s 16397 2572 246.45657 58 21 249.00000 228.92256 8.06% 41.6 30s 20729 1711 238.60922 45 27 249.00000 236.02183 5.21% 39.8 35s Cutting planes: Gomory: 20 Cover: 8 Implied bound: 240 Flow cover: 47 GUB cover: 1 Zero half: 2 Explored 24345 nodes (910122 simplex iterations) in 38.29 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.490000000000e+02, best bound 2.490000000000e+02, gap 0.0%