Gurobi 5.0.1 (linux64) logging started Tue Dec 25 15:29:53 2012 Optimize a model with 442 rows, 441 columns and 1997 nonzeros Presolve removed 113 rows and 60 columns Presolve time: 0.01s Presolved: 329 rows, 381 columns, 4488 nonzeros Variable types: 20 continuous, 361 integer (361 binary) Root relaxation: objective 1.996586e+02, 71 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 199.65862 0 29 - 199.65862 - - 0s 0 0 226.08643 0 38 - 226.08643 - - 0s 0 0 227.61212 0 40 - 227.61212 - - 0s 0 0 227.61212 0 49 - 227.61212 - - 0s 0 0 227.61212 0 48 - 227.61212 - - 0s 0 0 227.61212 0 48 - 227.61212 - - 0s 0 0 227.61212 0 45 - 227.61212 - - 0s 0 2 228.40000 0 44 - 228.40000 - - 0s * 815 447 30 321.0000000 242.56239 24.4% 12.7 1s * 834 407 40 314.0000000 242.56239 22.8% 12.7 1s H 1086 414 292.0000000 243.93019 16.5% 12.3 1s H 1140 360 280.0000000 244.70727 12.6% 12.4 1s H 1498 369 277.0000000 246.37233 11.1% 14.0 2s * 2786 552 45 275.0000000 250.13521 9.04% 13.1 3s * 3045 636 51 274.0000000 251.02193 8.39% 13.0 3s * 3548 707 49 271.0000000 252.16746 6.95% 13.1 4s 4848 704 cutoff 51 271.00000 256.29022 5.43% 13.3 5s Cutting planes: Gomory: 11 Cover: 7 Implied bound: 99 Clique: 8 MIR: 44 GUB cover: 4 Zero half: 12 Explored 7472 nodes (95876 simplex iterations) in 6.67 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.710000000000e+02, best bound 2.710000000000e+02, gap 0.0%