Gurobi 5.0.1 (linux64) logging started Fri Nov 16 01:12:21 2012 Optimize a model with 4024 rows, 650 columns and 12598 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.07s Presolved: 4047 rows, 648 columns, 19986 nonzeros Variable types: 0 continuous, 648 integer (648 binary) Found heuristic solution: objective 25.0000000 Root relaxation: objective 4.486486e+00, 4440 iterations, 0.36 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 4.48649 0 321 25.00000 4.48649 82.1% - 0s H 0 0 23.0000000 4.48649 80.5% - 0s 0 0 6.00000 0 92 23.00000 6.00000 73.9% - 1s H 0 0 21.0000000 6.00000 71.4% - 1s H 0 0 20.0000000 6.00000 70.0% - 1s 0 0 6.00000 0 95 20.00000 6.00000 70.0% - 1s 0 0 6.00000 0 18 20.00000 6.00000 70.0% - 1s H 0 0 11.0000000 6.00000 45.5% - 1s H 0 0 7.0000000 6.00000 14.3% - 1s 0 0 6.00000 0 37 7.00000 6.00000 14.3% - 1s 0 0 6.00000 0 36 7.00000 6.00000 14.3% - 1s 0 0 6.00000 0 58 7.00000 6.00000 14.3% - 1s 0 0 6.00000 0 58 7.00000 6.00000 14.3% - 1s 0 0 6.00000 0 32 7.00000 6.00000 14.3% - 1s 0 0 6.00000 0 36 7.00000 6.00000 14.3% - 1s 0 0 6.00000 0 32 7.00000 6.00000 14.3% - 1s 0 0 6.00000 0 55 7.00000 6.00000 14.3% - 2s 0 0 6.00000 0 32 7.00000 6.00000 14.3% - 2s 0 0 6.00000 0 36 7.00000 6.00000 14.3% - 2s 0 0 6.00000 0 36 7.00000 6.00000 14.3% - 2s 0 0 6.00000 0 36 7.00000 6.00000 14.3% - 2s 0 2 6.00000 0 36 7.00000 6.00000 14.3% - 2s Cutting planes: Clique: 4 Zero half: 37 Explored 17 nodes (17904 simplex iterations) in 2.45 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%