Optimize a model with 42 rows, 861 columns and 1722 nonzeros Presolve time: 0.00s Presolved: 42 rows, 861 columns, 1722 nonzeros Variable types: 0 continuous, 861 integer (861 binary) Root relaxation: objective 6.410000e+02, 71 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 641.00000 0 6 - 641.00000 - - 0s 0 0 642.00000 0 6 - 642.00000 - - 0s 0 0 643.50000 0 6 - 643.50000 - - 0s 0 0 644.16667 0 13 - 644.16667 - - 0s 0 0 645.50000 0 13 - 645.50000 - - 0s 0 0 646.00000 0 10 - 646.00000 - - 0s 0 0 679.50000 0 10 - 679.50000 - - 0s 0 0 680.00000 0 17 - 680.00000 - - 0s 0 0 680.00000 0 17 - 680.00000 - - 0s 0 2 680.33333 0 17 - 680.33333 - - 0s * 21 21 14 724.0000000 682.25000 5.77% 5.2 0s * 36 26 10 718.0000000 684.25000 4.70% 5.3 0s * 41 13 3 701.0000000 686.00000 2.14% 5.7 0s * 45 8 5 699.0000000 687.00000 1.72% 5.8 0s Cutting planes: Zero half: 10 Explored 54 nodes (433 simplex iterations) in 0.06 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.990000000000e+02, best bound 6.990000000000e+02, gap 0.0% Gurobi 5.0.1 (linux64) logging started Sun Nov 25 02:42:23 2012