Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:38:25 2012 Optimize a model with 295 rows, 226 columns and 961 nonzeros Presolve removed 0 rows and 3 columns Presolve time: 0.00s Presolved: 295 rows, 223 columns, 958 nonzeros Variable types: 0 continuous, 223 integer (222 binary) Found heuristic solution: objective 66.0000000 Root relaxation: objective 0.000000e+00, 115 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 75 66.00000 0.00000 100% - 0s H 0 0 54.0000000 0.00000 100% - 0s H 0 0 51.0000000 0.00000 100% - 0s 0 0 0.48000 0 76 51.00000 0.48000 99.1% - 0s H 0 0 50.0000000 0.48000 99.0% - 0s 0 0 1.00000 0 78 50.00000 1.00000 98.0% - 0s H 0 0 48.0000000 1.00000 97.9% - 0s 0 0 1.00000 0 79 48.00000 1.00000 97.9% - 0s 0 0 1.00000 0 79 48.00000 1.00000 97.9% - 0s H 0 0 41.0000000 1.00000 97.6% - 0s H 0 0 40.0000000 1.00000 97.5% - 0s H 0 0 38.0000000 1.00000 97.4% - 0s 0 2 1.00000 0 75 38.00000 1.00000 97.4% - 0s * 31 31 17 27.0000000 4.38120 83.8% 35.5 0s * 80 56 12 25.0000000 6.47246 74.1% 32.3 0s * 874 187 21 24.0000000 12.77619 46.8% 25.9 0s Explored 2098 nodes (45924 simplex iterations) in 1.57 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.400000000000e+01, best bound 2.400000000000e+01, gap 0.0%