Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:47:06 2012 Optimize a model with 2252 rows, 96 columns and 4504 nonzeros Presolve removed 1599 rows and 0 columns Presolve time: 0.06s Presolved: 653 rows, 96 columns, 4368 nonzeros Variable types: 0 continuous, 96 integer (96 binary) Found heuristic solution: objective 8.0000000 Root relaxation: objective 1.413684e+01, 355 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 14.13684 0 90 8.00000 14.13684 76.7% - 0s H 0 0 9.0000000 14.13684 57.1% - 0s 0 0 13.68068 0 91 9.00000 13.68068 52.0% - 0s 0 0 13.59685 0 93 9.00000 13.59685 51.1% - 0s 0 0 13.50493 0 94 9.00000 13.50493 50.1% - 0s 0 0 13.49527 0 94 9.00000 13.49527 49.9% - 0s 0 0 13.46352 0 94 9.00000 13.46352 49.6% - 0s 0 0 13.45058 0 95 9.00000 13.45058 49.5% - 0s 0 0 13.44245 0 92 9.00000 13.44245 49.4% - 0s 0 0 13.43350 0 94 9.00000 13.43350 49.3% - 0s 0 0 13.43111 0 94 9.00000 13.43111 49.2% - 0s 0 0 13.42906 0 94 9.00000 13.42906 49.2% - 1s 0 0 13.41334 0 94 9.00000 13.41334 49.0% - 1s 0 0 13.41045 0 94 9.00000 13.41045 49.0% - 1s 0 0 13.40828 0 94 9.00000 13.40828 49.0% - 1s 0 0 13.40762 0 95 9.00000 13.40762 49.0% - 1s 0 0 13.40512 0 94 9.00000 13.40512 48.9% - 1s 0 0 13.40276 0 93 9.00000 13.40276 48.9% - 1s 0 0 13.40243 0 94 9.00000 13.40243 48.9% - 1s 0 0 13.40231 0 94 9.00000 13.40231 48.9% - 1s 0 0 13.40225 0 94 9.00000 13.40225 48.9% - 1s 0 2 13.39786 0 94 9.00000 13.39786 48.9% - 1s Cutting planes: Clique: 68 Explored 148 nodes (8707 simplex iterations) in 2.34 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%