Optimize a model with 120 rows, 7140 columns and 14280 nonzeros Presolve time: 0.01s Presolved: 120 rows, 7140 columns, 14280 nonzeros Variable types: 0 continuous, 7140 integer (7140 binary) Root relaxation: objective 6.662500e+03, 185 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 6662.50000 0 6 - 6662.50000 - - 0s 0 0 6666.50000 0 12 - 6666.50000 - - 0s 0 0 6669.00000 0 15 - 6669.00000 - - 0s 0 0 6676.25000 0 16 - 6676.25000 - - 0s 0 0 6677.00000 0 20 - 6677.00000 - - 0s 0 0 6678.75000 0 25 - 6678.75000 - - 0s 0 0 6679.00000 0 20 - 6679.00000 - - 0s 0 0 6682.25000 0 14 - 6682.25000 - - 0s 0 0 6683.12500 0 26 - 6683.12500 - - 0s 0 0 6686.50000 0 12 - 6686.50000 - - 0s 0 0 6687.33333 0 21 - 6687.33333 - - 0s 0 0 6689.91667 0 32 - 6689.91667 - - 0s 0 0 6690.37500 0 35 - 6690.37500 - - 0s 0 0 6690.87500 0 17 - 6690.87500 - - 0s 0 0 6691.16667 0 34 - 6691.16667 - - 0s 0 0 6691.16667 0 34 - 6691.16667 - - 0s 0 2 6691.56667 0 34 - 6691.56667 - - 0s * 60 53 42 7085.0000000 6890.00000 2.75% 9.0 1s * 146 79 33 7000.0000000 6895.50000 1.49% 7.2 2s * 165 53 15 6955.0000000 6896.50000 0.84% 7.0 2s * 218 67 22 6951.0000000 6903.50000 0.68% 6.6 2s * 341 49 16 6944.0000000 6925.00000 0.27% 7.0 4s * 369 19 17 6942.0000000 6935.50000 0.09% 7.0 4s Cutting planes: User: 108 Zero half: 21 Explored 389 nodes (2889 simplex iterations) in 4.75 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.942000000000e+03, best bound 6.942000000000e+03, gap 0.0% Gurobi 5.0.1 (linux64) logging started Sun Nov 25 02:43:59 2012