Gurobi 5.0.1 (linux64) logging started Sun Nov 18 04:00:21 2012 Optimize a model with 333 rows, 250 columns and 1080 nonzeros Presolve removed 0 rows and 3 columns Presolve time: 0.00s Presolved: 333 rows, 247 columns, 1077 nonzeros Variable types: 0 continuous, 247 integer (246 binary) Found heuristic solution: objective 58.0000000 Root relaxation: objective 0.000000e+00, 126 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 80 58.00000 0.00000 100% - 0s H 0 0 57.0000000 0.00000 100% - 0s 0 0 0.54697 0 81 57.00000 0.54697 99.0% - 0s H 0 0 56.0000000 0.54697 99.0% - 0s 0 0 1.00000 0 82 56.00000 1.00000 98.2% - 0s H 0 0 55.0000000 1.00000 98.2% - 0s 0 0 1.15387 0 83 55.00000 1.15387 97.9% - 0s H 0 0 53.0000000 1.15387 97.8% - 0s 0 0 1.15875 0 84 53.00000 1.15875 97.8% - 0s 0 0 1.15875 0 84 53.00000 1.15875 97.8% - 0s H 0 0 51.0000000 1.15875 97.7% - 0s H 0 0 49.0000000 1.15875 97.6% - 0s H 0 0 48.0000000 1.15875 97.6% - 0s 0 2 1.18642 0 84 48.00000 1.18642 97.5% - 0s * 45 36 28 32.0000000 2.82548 91.2% 29.4 0s * 248 195 21 31.0000000 6.97075 77.5% 31.1 0s * 301 230 16 30.0000000 6.98293 76.7% 31.5 0s * 4161 471 31 29.0000000 21.37500 26.3% 22.2 3s 6326 260 cutoff 23 29.00000 23.88889 17.6% 21.1 5s Explored 6987 nodes (145000 simplex iterations) in 5.38 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.900000000000e+01, best bound 2.900000000000e+01, gap 0.0%