Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:34:38 2012 Optimize a model with 534 rows, 146 columns and 1068 nonzeros Presolve removed 110 rows and 2 columns Presolve time: 0.00s Presolved: 424 rows, 144 columns, 913 nonzeros Variable types: 0 continuous, 144 integer (144 binary) Found heuristic solution: objective 46.0000000 Root relaxation: objective 5.950000e+01, 244 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 59.50000 0 109 46.00000 59.50000 29.3% - 0s H 0 0 48.0000000 59.50000 24.0% - 0s 0 0 58.30000 0 132 48.00000 58.30000 21.5% - 0s H 0 0 49.0000000 58.30000 19.0% - 0s 0 0 57.88235 0 140 49.00000 57.88235 18.1% - 0s H 0 0 51.0000000 57.88235 13.5% - 0s H 0 0 52.0000000 57.88235 11.3% - 0s 0 0 57.34091 0 136 52.00000 57.34091 10.3% - 0s 0 0 57.19152 0 140 52.00000 57.19152 10.0% - 0s 0 0 57.14014 0 141 52.00000 57.14014 9.88% - 0s 0 0 56.96759 0 141 52.00000 56.96759 9.55% - 0s 0 0 56.65500 0 140 52.00000 56.65500 8.95% - 0s 0 0 56.55927 0 139 52.00000 56.55927 8.77% - 0s H 0 0 53.0000000 56.55927 6.72% - 0s 0 0 56.46857 0 141 53.00000 56.46857 6.54% - 0s 0 0 56.43398 0 141 53.00000 56.43398 6.48% - 0s 0 0 56.40926 0 142 53.00000 56.40926 6.43% - 0s 0 0 56.40926 0 142 53.00000 56.40926 6.43% - 0s 0 2 56.40697 0 141 53.00000 56.40697 6.43% - 0s Cutting planes: Gomory: 1 Clique: 1 Zero half: 133 Explored 127 nodes (5741 simplex iterations) in 0.27 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.300000000000e+01, best bound 5.300000000000e+01, gap 0.0%