Gurobi 5.0.1 (linux64) logging started Fri Nov 16 01:23:20 2012 Optimize a model with 4751 rows, 756 columns and 14875 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.07s Presolved: 4749 rows, 754 columns, 19934 nonzeros Variable types: 0 continuous, 754 integer (754 binary) Found heuristic solution: objective 27.0000000 Root relaxation: objective 3.886792e+00, 4470 iterations, 0.24 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.88679 0 488 27.00000 3.88679 85.6% - 0s H 0 0 25.0000000 3.88679 84.5% - 0s 0 0 6.00000 0 85 25.00000 6.00000 76.0% - 1s H 0 0 16.0000000 6.00000 62.5% - 1s H 0 0 15.0000000 6.00000 60.0% - 1s H 0 0 7.0000000 6.00000 14.3% - 1s 0 0 6.00000 0 67 7.00000 6.00000 14.3% - 1s 0 0 6.00000 0 62 7.00000 6.00000 14.3% - 1s 0 0 6.00000 0 71 7.00000 6.00000 14.3% - 1s 0 0 6.00000 0 72 7.00000 6.00000 14.3% - 1s 0 0 6.00000 0 75 7.00000 6.00000 14.3% - 1s 0 0 6.00000 0 72 7.00000 6.00000 14.3% - 1s 0 0 6.00000 0 70 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 54 7.00000 6.00000 14.3% - 1s 0 0 6.00000 0 57 7.00000 6.00000 14.3% - 1s 0 0 6.00000 0 49 7.00000 6.00000 14.3% - 1s 0 2 6.00000 0 49 7.00000 6.00000 14.3% - 1s Cutting planes: Clique: 11 Zero half: 4 Explored 55 nodes (18459 simplex iterations) in 2.09 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%