Gurobi 5.0.1 (linux64) logging started Sun Nov 18 07:33:09 2012 Optimize a model with 555 rows, 507 columns and 1892 nonzeros Presolve removed 0 rows and 17 columns Presolve time: 0.00s Presolved: 555 rows, 490 columns, 1875 nonzeros Variable types: 0 continuous, 490 integer (489 binary) Found heuristic solution: objective 101.0000000 Root relaxation: objective 0.000000e+00, 273 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 208 101.00000 0.00000 100% - 0s H 0 0 81.0000000 0.00000 100% - 0s H 0 0 75.0000000 0.00000 100% - 0s 0 0 0.51241 0 211 75.00000 0.51241 99.3% - 0s H 0 0 62.0000000 0.51241 99.2% - 0s 0 0 0.74214 0 214 62.00000 0.74214 98.8% - 0s H 0 0 52.0000000 0.74214 98.6% - 0s 0 0 0.74239 0 214 52.00000 0.74239 98.6% - 0s 0 0 0.74239 0 213 52.00000 0.74239 98.6% - 0s 0 2 0.74597 0 213 52.00000 0.74597 98.6% - 0s H 27 27 49.0000000 1.00000 98.0% 48.7 0s H 32 32 28.0000000 1.00000 96.4% 48.5 0s * 48 48 29 22.0000000 1.00000 95.5% 39.9 0s H 242 183 21.0000000 1.00000 95.2% 34.6 0s * 650 374 35 20.0000000 4.38095 78.1% 33.0 1s H 1847 284 18.0000000 11.06977 38.5% 30.0 3s 2812 98 17.00000 20 208 18.00000 15.23256 15.4% 30.5 5s Explored 2932 nodes (89538 simplex iterations) in 5.13 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.800000000000e+01, best bound 1.800000000000e+01, gap 0.0%