Optimize a model with 280 rows, 39060 columns and 78120 nonzeros Presolve time: 0.21s Presolved: 280 rows, 39060 columns, 78120 nonzeros Variable types: 0 continuous, 39060 integer (39060 binary) Root relaxation: objective 2.534000e+03, 409 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2534.00000 0 32 - 2534.00000 - - 0s 0 0 2536.50000 0 20 - 2536.50000 - - 0s 0 0 2539.16667 0 40 - 2539.16667 - - 0s 0 0 2539.66667 0 46 - 2539.66667 - - 0s 0 0 2541.00000 0 31 - 2541.00000 - - 0s 0 0 2541.66667 0 32 - 2541.66667 - - 0s 0 0 2542.00000 0 30 - 2542.00000 - - 0s 0 0 2542.16667 0 42 - 2542.16667 - - 0s 0 0 2542.50000 0 40 - 2542.50000 - - 0s 0 0 2543.00000 0 45 - 2543.00000 - - 0s 0 0 2543.00000 0 48 - 2543.00000 - - 0s 0 0 2543.00000 0 31 - 2543.00000 - - 0s 0 2 2543.02941 0 31 - 2543.02941 - - 1s * 307 307 253 2756.0000000 2549.50000 7.49% 3.6 4s * 336 313 280 2754.0000000 2549.50000 7.43% 3.5 4s 347 312 2572.30000 3 42 2754.00000 2550.50000 7.39% 3.6 5s * 564 335 191 2653.0000000 2550.50000 3.86% 3.3 7s 703 452 2646.50000 105 28 2653.00000 2563.50000 3.37% 3.2 10s * 708 433 13 2579.0000000 2579.00000 0.0% 3.2 12s Cutting planes: Gomory: 16 Cover: 1 Zero half: 8 Explored 708 nodes (3752 simplex iterations) in 12.77 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.579000000000e+03, best bound 2.579000000000e+03, gap 0.0% Gurobi 5.0.1 (linux64) logging started Sun Nov 25 06:12:33 2012