Gurobi 5.0.1 (linux64) logging started Fri Nov 16 01:36:19 2012 Optimize a model with 5655 rows, 812 columns and 17638 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.07s Presolved: 5681 rows, 810 columns, 23975 nonzeros Variable types: 0 continuous, 810 integer (810 binary) Found heuristic solution: objective 28.0000000 Root relaxation: objective 3.677419e+00, 4669 iterations, 0.26 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.67742 0 599 28.00000 3.67742 86.9% - 0s H 0 0 27.0000000 3.67742 86.4% - 0s 0 0 6.00000 0 94 27.00000 6.00000 77.8% - 0s H 0 0 25.0000000 6.00000 76.0% - 1s H 0 0 7.0000000 6.00000 14.3% - 1s 0 0 6.00000 0 99 7.00000 6.00000 14.3% - 1s 0 0 infeasible 0 7.00000 6.00001 14.3% - 1s Explored 0 nodes (7681 simplex iterations) in 1.43 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 7.000000000000e+00, best bound 7.000000000000e+00, gap 0.0%