Gurobi 5.0.1 (linux64) logging started Wed Dec 19 14:01:14 2012 Optimize a model with 482 rows, 441 columns and 2602 nonzeros Presolve removed 281 rows and 348 columns Presolve time: 0.01s Presolved: 201 rows, 93 columns, 1216 nonzeros Variable types: 16 continuous, 77 integer (77 binary) Found heuristic solution: objective 315.0000000 Root relaxation: objective 2.683566e+02, 45 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 268.35664 0 17 315.00000 268.35664 14.8% - 0s H 0 0 290.0000000 268.35664 7.46% - 0s 0 0 271.30274 0 9 290.00000 271.30274 6.45% - 0s 0 0 271.55312 0 14 290.00000 271.55312 6.36% - 0s 0 0 272.50000 0 6 290.00000 272.50000 6.03% - 0s 0 0 273.64286 0 14 290.00000 273.64286 5.64% - 0s 0 0 274.00000 0 11 290.00000 274.00000 5.52% - 0s 0 0 274.00000 0 13 290.00000 274.00000 5.52% - 0s 0 0 274.00000 0 12 290.00000 274.00000 5.52% - 0s 0 0 274.00000 0 12 290.00000 274.00000 5.52% - 0s 0 0 274.00000 0 13 290.00000 274.00000 5.52% - 0s 0 0 274.00000 0 12 290.00000 274.00000 5.52% - 0s 0 0 274.00000 0 12 290.00000 274.00000 5.52% - 0s 0 0 274.00000 0 12 290.00000 274.00000 5.52% - 0s 0 2 274.00000 0 12 290.00000 274.00000 5.52% - 0s * 25 18 8 289.0000000 275.14286 4.79% 5.5 0s * 27 16 6 288.0000000 275.14286 4.46% 5.3 0s Cutting planes: Learned: 1 Gomory: 1 Cover: 6 Implied bound: 1 MIR: 11 GUB cover: 4 Zero half: 3 Mod-K: 3 Explored 124 nodes (781 simplex iterations) in 0.06 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.880000000000e+02, best bound 2.880000000000e+02, gap 0.0%