Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:58:40 2012 Optimize a model with 3699 rows, 121 columns and 7398 nonzeros Presolve removed 2638 rows and 0 columns Presolve time: 0.12s Presolved: 1061 rows, 121 columns, 7534 nonzeros Variable types: 0 continuous, 121 integer (121 binary) Found heuristic solution: objective 7.0000000 Root relaxation: objective 1.571352e+01, 479 iterations, 0.03 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 15.71352 0 116 7.00000 15.71352 124% - 0s H 0 0 8.0000000 15.71352 96.4% - 0s 0 0 15.27552 0 119 8.00000 15.27552 90.9% - 0s 0 0 15.18612 0 119 8.00000 15.18612 89.8% - 0s 0 0 15.15138 0 119 8.00000 15.15138 89.4% - 0s 0 0 15.11384 0 121 8.00000 15.11384 88.9% - 0s 0 0 15.10157 0 121 8.00000 15.10157 88.8% - 1s H 0 0 9.0000000 15.10157 67.8% - 1s 0 0 15.09710 0 121 9.00000 15.09710 67.7% - 1s 0 0 15.09250 0 121 9.00000 15.09250 67.7% - 1s 0 0 15.08837 0 121 9.00000 15.08837 67.6% - 1s 0 0 15.08738 0 121 9.00000 15.08738 67.6% - 1s 0 0 15.08724 0 121 9.00000 15.08724 67.6% - 1s 0 2 15.08607 0 121 9.00000 15.08607 67.6% - 2s * 122 54 8 10.0000000 14.51661 45.2% 75.5 3s Cutting planes: Clique: 110 Explored 252 nodes (19877 simplex iterations) in 3.69 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.000000000000e+01, best bound 1.000000000000e+01, gap 0.0%