Gurobi 5.0.1 (linux64) logging started Fri Nov 16 02:34:30 2012 Optimize a model with 8810 rows, 1122 columns and 27388 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.10s Presolved: 8841 rows, 1120 columns, 30265 nonzeros Variable types: 0 continuous, 1120 integer (1120 binary) Found heuristic solution: objective 32.0000000 Root relaxation: objective 3.455399e+00, 7474 iterations, 0.56 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.45540 0 1002 32.00000 3.45540 89.2% - 1s 0 0 4.02778 0 238 32.00000 4.02778 87.4% - 2s H 0 0 31.0000000 4.02778 87.0% - 2s H 0 0 9.0000000 4.02778 55.2% - 2s 0 0 5.00000 0 320 9.00000 5.00000 44.4% - 2s 0 0 5.09328 0 774 9.00000 5.09328 43.4% - 3s 0 0 5.09328 0 773 9.00000 5.09328 43.4% - 3s 0 0 5.09328 0 786 9.00000 5.09328 43.4% - 3s 0 0 5.09328 0 647 9.00000 5.09328 43.4% - 5s 0 0 5.09328 0 670 9.00000 5.09328 43.4% - 7s 0 0 5.09328 0 670 9.00000 5.09328 43.4% - 7s 0 2 5.86207 0 670 9.00000 5.86207 34.9% - 9s * 27 19 21 8.0000000 6.00000 25.0% 258 9s H 30 1 7.0000000 6.00000 14.3% 232 10s Cutting planes: Gomory: 33 Clique: 105 Zero half: 4 Explored 32 nodes (38801 simplex iterations) in 10.11 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%