Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:46:58 2012 Optimize a model with 2240 rows, 95 columns and 4480 nonzeros Presolve removed 1593 rows and 0 columns Presolve time: 0.06s Presolved: 647 rows, 95 columns, 4272 nonzeros Variable types: 0 continuous, 95 integer (95 binary) Found heuristic solution: objective 7.0000000 Root relaxation: objective 1.367363e+01, 328 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 13.67363 0 93 7.00000 13.67363 95.3% - 0s H 0 0 8.0000000 13.67363 70.9% - 0s 0 0 13.29313 0 93 8.00000 13.29313 66.2% - 0s 0 0 13.18059 0 92 8.00000 13.18059 64.8% - 0s 0 0 13.14061 0 94 8.00000 13.14061 64.3% - 0s 0 0 13.11709 0 94 8.00000 13.11709 64.0% - 0s H 0 0 9.0000000 13.11709 45.7% - 0s 0 0 13.11496 0 94 9.00000 13.11496 45.7% - 0s 0 0 13.11242 0 94 9.00000 13.11242 45.7% - 0s 0 0 13.10937 0 94 9.00000 13.10937 45.7% - 0s 0 0 13.10760 0 94 9.00000 13.10760 45.6% - 0s 0 0 13.10666 0 93 9.00000 13.10666 45.6% - 0s 0 0 13.10510 0 95 9.00000 13.10510 45.6% - 0s 0 2 13.10338 0 95 9.00000 13.10338 45.6% - 1s Cutting planes: Clique: 61 Zero half: 1 Explored 102 nodes (7454 simplex iterations) in 1.35 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 9.000000000000e+00, best bound 9.000000000000e+00, gap 0.0%