Gurobi 5.0.1 (linux64) logging started Tue Dec 25 15:27:45 2012 Optimize a model with 442 rows, 441 columns and 1981 nonzeros Presolve removed 157 rows and 89 columns Presolve time: 0.01s Presolved: 285 rows, 352 columns, 3406 nonzeros Variable types: 20 continuous, 332 integer (332 binary) Root relaxation: objective 1.668657e+02, 72 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 166.86568 0 29 - 166.86568 - - 0s 0 0 183.38217 0 27 - 183.38217 - - 0s 0 0 185.00000 0 27 - 185.00000 - - 0s 0 0 185.00000 0 27 - 185.00000 - - 0s 0 2 188.00000 0 27 - 188.00000 - - 0s * 221 104 25 229.0000000 193.59243 15.5% 6.4 0s * 262 119 17 228.0000000 195.00000 14.5% 6.4 0s H 330 128 222.0000000 195.50000 11.9% 5.9 0s H 378 79 210.0000000 196.42500 6.46% 5.9 0s * 384 31 15 202.0000000 196.50000 2.72% 5.9 0s * 403 17 15 201.0000000 197.35710 1.81% 5.8 0s Cutting planes: Gomory: 3 Cover: 3 Implied bound: 11 Clique: 3 MIR: 4 GUB cover: 1 Explored 421 nodes (2562 simplex iterations) in 0.24 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.010000000000e+02, best bound 2.010000000000e+02, gap 0.0%