Gurobi 5.0.1 (linux64) logging started Fri Nov 16 01:23:47 2012 Optimize a model with 4940 rows, 756 columns and 15442 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.07s Presolved: 4965 rows, 754 columns, 21843 nonzeros Variable types: 0 continuous, 754 integer (754 binary) Found heuristic solution: objective 27.0000000 Root relaxation: objective 3.818182e+00, 4176 iterations, 0.22 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.81818 0 488 27.00000 3.81818 85.9% - 0s H 0 0 26.0000000 3.81818 85.3% - 0s 0 0 6.00000 0 36 26.00000 6.00000 76.9% - 1s H 0 0 14.0000000 6.00000 57.1% - 1s H 0 0 7.0000000 6.00000 14.3% - 1s 0 0 6.00000 0 16 7.00000 6.00000 14.3% - 1s 0 0 6.00000 0 20 7.00000 6.00000 14.3% - 1s 0 0 6.00000 0 106 7.00000 6.00000 14.3% - 1s 0 0 6.00000 0 20 7.00000 6.00000 14.3% - 1s 0 0 6.00000 0 73 7.00000 6.00000 14.3% - 1s 0 0 6.00000 0 47 7.00000 6.00000 14.3% - 1s 0 0 6.00000 0 20 7.00000 6.00000 14.3% - 1s 0 0 6.00000 0 73 7.00000 6.00000 14.3% - 1s 0 0 6.00000 0 22 7.00000 6.00000 14.3% - 1s 0 0 6.00000 0 14 7.00000 6.00000 14.3% - 1s 0 0 6.00000 0 44 7.00000 6.00000 14.3% - 1s 0 0 6.00000 0 65 7.00000 6.00000 14.3% - 1s 0 0 6.00000 0 29 7.00000 6.00000 14.3% - 1s 0 2 6.00000 0 29 7.00000 6.00000 14.3% - 1s Cutting planes: Clique: 3 Zero half: 4 Explored 11 nodes (15672 simplex iterations) in 1.93 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%