Gurobi 5.0.1 (linux64) logging started Fri Nov 16 01:22:49 2012 Optimize a model with 4886 rows, 756 columns and 15280 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.07s Presolved: 4884 rows, 754 columns, 20388 nonzeros Variable types: 0 continuous, 754 integer (754 binary) Found heuristic solution: objective 27.0000000 Root relaxation: objective 3.818182e+00, 4653 iterations, 0.29 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.81818 0 505 27.00000 3.81818 85.9% - 1s 0 0 6.00000 0 115 27.00000 6.00000 77.8% - 1s H 0 0 23.0000000 6.00000 73.9% - 1s 0 0 6.00000 0 111 23.00000 6.00000 73.9% - 1s H 0 0 19.0000000 6.00000 68.4% - 1s 0 0 6.00000 0 110 19.00000 6.00000 68.4% - 1s 0 0 6.00000 0 106 19.00000 6.00000 68.4% - 1s 0 0 6.00000 0 108 19.00000 6.00000 68.4% - 1s H 0 0 14.0000000 6.00000 57.1% - 1s 0 0 6.00000 0 48 14.00000 6.00000 57.1% - 2s H 0 0 10.0000000 6.00000 40.0% - 2s H 0 0 9.0000000 6.00000 33.3% - 2s H 0 0 7.0000000 6.00000 14.3% - 2s 0 0 6.00000 0 58 7.00000 6.00000 14.3% - 2s 0 0 6.00000 0 14 7.00000 6.00000 14.3% - 2s 0 0 6.00000 0 48 7.00000 6.00000 14.3% - 2s 0 0 6.00000 0 31 7.00000 6.00000 14.3% - 2s 0 0 6.00000 0 56 7.00000 6.00000 14.3% - 2s 0 0 6.00000 0 54 7.00000 6.00000 14.3% - 2s 0 0 6.00000 0 51 7.00000 6.00000 14.3% - 2s 0 0 6.00000 0 31 7.00000 6.00000 14.3% - 2s 0 0 6.00000 0 56 7.00000 6.00000 14.3% - 2s 0 0 6.00000 0 59 7.00000 6.00000 14.3% - 2s 0 0 6.00000 0 59 7.00000 6.00000 14.3% - 2s 0 2 6.00000 0 59 7.00000 6.00000 14.3% - 2s Cutting planes: Clique: 5 Zero half: 5 Explored 9 nodes (18507 simplex iterations) in 2.85 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%