Gurobi 5.0.1 (linux64) logging started Wed Dec 19 14:01:12 2012 Optimize a model with 442 rows, 441 columns and 1908 nonzeros Presolve removed 352 rows and 323 columns Presolve time: 0.00s Presolved: 90 rows, 118 columns, 568 nonzeros Variable types: 15 continuous, 103 integer (103 binary) Found heuristic solution: objective 355.0000000 Root relaxation: objective 2.992970e+02, 49 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 299.29699 0 28 355.00000 299.29699 15.7% - 0s H 0 0 345.0000000 299.29699 13.2% - 0s 0 0 308.75949 0 15 345.00000 308.75949 10.5% - 0s H 0 0 339.0000000 308.75949 8.92% - 0s 0 0 312.00000 0 8 339.00000 312.00000 7.96% - 0s H 0 0 319.0000000 312.00000 2.19% - 0s 0 0 312.00000 0 8 319.00000 312.00000 2.19% - 0s 0 0 312.00000 0 8 319.00000 312.00000 2.19% - 0s 0 0 312.00000 0 8 319.00000 312.00000 2.19% - 0s 0 0 312.00000 0 8 319.00000 312.00000 2.19% - 0s 0 0 312.00000 0 8 319.00000 312.00000 2.19% - 0s 0 0 312.00000 0 8 319.00000 312.00000 2.19% - 0s H 0 0 318.0000000 312.00000 1.89% - 0s H 0 0 317.0000000 312.00000 1.58% - 0s 0 2 312.00000 0 5 317.00000 312.00000 1.58% - 0s Cutting planes: Gomory: 3 Cover: 1 Implied bound: 9 MIR: 2 Explored 9 nodes (243 simplex iterations) in 0.03 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.170000000000e+02, best bound 3.170000000000e+02, gap 0.0%