Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:51:42 2012 Optimize a model with 663 rows, 114 columns and 1326 nonzeros Presolve removed 266 rows and 0 columns Presolve time: 0.00s Presolved: 397 rows, 114 columns, 1025 nonzeros Variable types: 0 continuous, 114 integer (114 binary) Found heuristic solution: objective 27.0000000 Root relaxation: objective 3.842487e+01, 270 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 38.42487 0 112 27.00000 38.42487 42.3% - 0s H 0 0 29.0000000 38.42487 32.5% - 0s 0 0 37.91049 0 114 29.00000 37.91049 30.7% - 0s 0 0 37.81512 0 113 29.00000 37.81512 30.4% - 0s 0 0 37.77477 0 112 29.00000 37.77477 30.3% - 0s 0 0 37.70856 0 114 29.00000 37.70856 30.0% - 0s 0 0 37.57287 0 112 29.00000 37.57287 29.6% - 0s 0 0 37.34679 0 111 29.00000 37.34679 28.8% - 0s 0 0 37.18560 0 113 29.00000 37.18560 28.2% - 0s 0 0 37.08538 0 111 29.00000 37.08538 27.9% - 0s 0 0 37.04438 0 112 29.00000 37.04438 27.7% - 0s H 0 0 30.0000000 37.04438 23.5% - 0s 0 0 36.94093 0 112 30.00000 36.94093 23.1% - 0s 0 0 36.84114 0 111 30.00000 36.84114 22.8% - 0s 0 0 36.81765 0 113 30.00000 36.81765 22.7% - 0s 0 0 36.76552 0 112 30.00000 36.76552 22.6% - 0s 0 0 36.71101 0 113 30.00000 36.71101 22.4% - 0s 0 0 36.69773 0 112 30.00000 36.69773 22.3% - 0s 0 0 36.69711 0 113 30.00000 36.69711 22.3% - 0s 0 0 36.69711 0 113 30.00000 36.69711 22.3% - 0s 0 2 36.69708 0 113 30.00000 36.69708 22.3% - 0s * 22 12 14 31.0000000 36.69708 18.4% 39.3 0s Cutting planes: Clique: 4 Zero half: 48 Explored 757 nodes (22424 simplex iterations) in 0.89 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.100000000000e+01, best bound 3.100000000000e+01, gap 0.0%