Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:49:31 2012 Optimize a model with 523 rows, 103 columns and 1046 nonzeros Presolve removed 179 rows and 2 columns Presolve time: 0.00s Presolved: 344 rows, 101 columns, 838 nonzeros Variable types: 0 continuous, 101 integer (101 binary) Found heuristic solution: objective 29.0000000 Root relaxation: objective 3.819231e+01, 233 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 38.19231 0 96 29.00000 38.19231 31.7% - 0s 0 0 36.97115 0 100 29.00000 36.97115 27.5% - 0s 0 0 36.70563 0 99 29.00000 36.70563 26.6% - 0s 0 0 36.51667 0 99 29.00000 36.51667 25.9% - 0s 0 0 36.43160 0 100 29.00000 36.43160 25.6% - 0s 0 0 36.37471 0 100 29.00000 36.37471 25.4% - 0s H 0 0 30.0000000 36.37471 21.2% - 0s 0 0 36.32924 0 99 30.00000 36.32924 21.1% - 0s 0 0 36.25496 0 99 30.00000 36.25496 20.8% - 0s 0 0 36.11492 0 98 30.00000 36.11492 20.4% - 0s 0 0 36.03703 0 98 30.00000 36.03703 20.1% - 0s 0 0 35.94108 0 98 30.00000 35.94108 19.8% - 0s 0 0 35.87078 0 99 30.00000 35.87078 19.6% - 0s 0 0 35.79438 0 99 30.00000 35.79438 19.3% - 0s 0 0 35.78831 0 97 30.00000 35.78831 19.3% - 0s 0 0 35.74887 0 99 30.00000 35.74887 19.2% - 0s H 0 0 31.0000000 35.74887 15.3% - 0s 0 0 35.73590 0 100 31.00000 35.73590 15.3% - 0s 0 0 35.73590 0 100 31.00000 35.73590 15.3% - 0s 0 2 35.73132 0 100 31.00000 35.73132 15.3% - 0s * 88 18 10 32.0000000 35.17305 9.92% 30.6 0s Cutting planes: Gomory: 1 Clique: 2 Zero half: 69 Explored 180 nodes (6175 simplex iterations) in 0.29 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.200000000000e+01, best bound 3.200000000000e+01, gap 0.0%