Gurobi 5.0.1 (linux64) logging started Wed Dec 19 14:34:08 2012 Optimize a model with 1762 rows, 1681 columns and 10282 nonzeros Presolve removed 518 rows and 679 columns Presolve time: 0.06s Presolved: 1244 rows, 1002 columns, 20138 nonzeros Variable types: 40 continuous, 962 integer (962 binary) Root relaxation: objective 2.959252e+02, 209 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 295.92517 0 80 - 295.92517 - - 0s 0 0 310.30110 0 65 - 310.30110 - - 0s 0 0 311.00000 0 56 - 311.00000 - - 0s 0 0 311.00000 0 66 - 311.00000 - - 0s 0 0 311.00000 0 57 - 311.00000 - - 0s 0 0 311.00000 0 54 - 311.00000 - - 0s 0 0 311.00000 0 54 - 311.00000 - - 0s 0 0 311.00000 0 54 - 311.00000 - - 0s 0 2 311.00000 0 54 - 311.00000 - - 0s * 559 295 9 344.0000000 312.02412 9.30% 11.4 1s H 619 314 341.0000000 312.20554 8.44% 11.6 1s * 638 286 15 335.0000000 312.30208 6.78% 11.8 1s * 639 269 15 333.0000000 312.30208 6.22% 11.8 1s H 785 275 330.0000000 313.62173 4.96% 11.6 1s H 902 295 328.0000000 325.89974 0.64% 11.4 1s Cutting planes: Learned: 1 Gomory: 4 Cover: 2 Clique: 1 MIR: 37 GUB cover: 1 Explored 904 nodes (11103 simplex iterations) in 1.96 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.280000000000e+02, best bound 3.280000000000e+02, gap 0.0%