Gurobi 5.0.1 (linux64) logging started Sat Nov 17 19:54:02 2012 Optimize a model with 223 rows, 132 columns and 687 nonzeros Presolve time: 0.00s Presolved: 223 rows, 132 columns, 687 nonzeros Variable types: 0 continuous, 132 integer (132 binary) Found heuristic solution: objective 53.0000000 Root relaxation: objective 0.000000e+00, 44 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 21 53.00000 0.00000 100% - 0s 0 0 1.03401 0 23 53.00000 1.03401 98.0% - 0s 0 0 1.20648 0 33 53.00000 1.20648 97.7% - 0s 0 0 1.23344 0 43 53.00000 1.23344 97.7% - 0s 0 0 1.41497 0 24 53.00000 1.41497 97.3% - 0s 0 0 1.41497 0 23 53.00000 1.41497 97.3% - 0s 0 0 1.46259 0 25 53.00000 1.46259 97.2% - 0s 0 0 1.51020 0 24 53.00000 1.51020 97.2% - 0s 0 0 1.55782 0 25 53.00000 1.55782 97.1% - 0s 0 0 1.57208 0 37 53.00000 1.57208 97.0% - 0s 0 0 1.63319 0 55 53.00000 1.63319 96.9% - 0s 0 0 1.86194 0 34 53.00000 1.86194 96.5% - 0s 0 0 1.86194 0 35 53.00000 1.86194 96.5% - 0s 0 0 1.86194 0 34 53.00000 1.86194 96.5% - 0s H 0 0 48.0000000 1.86194 96.1% - 0s 0 2 1.87912 0 34 48.00000 1.87912 96.1% - 0s * 30 17 13 47.0000000 8.05714 82.9% 22.0 0s * 230 115 12 45.0000000 19.55556 56.5% 19.5 0s * 1518 161 31 44.0000000 27.90909 36.6% 17.7 0s * 1950 150 29 43.0000000 30.63636 28.8% 17.3 0s Explored 2705 nodes (44645 simplex iterations) in 1.02 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.300000000000e+01, best bound 4.300000000000e+01, gap 0.0%