Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:36:06 2012 Optimize a model with 572 rows, 151 columns and 1144 nonzeros Presolve removed 100 rows and 0 columns Presolve time: 0.00s Presolved: 472 rows, 151 columns, 1007 nonzeros Variable types: 0 continuous, 151 integer (151 binary) Found heuristic solution: objective 49.0000000 Root relaxation: objective 6.300000e+01, 243 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 63.00000 0 112 49.00000 63.00000 28.6% - 0s 0 0 62.00000 0 148 49.00000 62.00000 26.5% - 0s H 0 0 51.0000000 62.00000 21.6% - 0s 0 0 61.22823 0 151 51.00000 61.22823 20.1% - 0s 0 0 60.16792 0 148 51.00000 60.16792 18.0% - 0s 0 0 59.89423 0 150 51.00000 59.89423 17.4% - 0s 0 0 59.73762 0 150 51.00000 59.73762 17.1% - 0s 0 0 59.46393 0 148 51.00000 59.46393 16.6% - 0s 0 0 59.29579 0 148 51.00000 59.29579 16.3% - 0s 0 0 59.27903 0 149 51.00000 59.27903 16.2% - 0s 0 0 59.27903 0 149 51.00000 59.27903 16.2% - 0s H 0 0 52.0000000 59.27903 14.0% - 0s 0 2 59.27658 0 149 52.00000 59.27658 14.0% - 0s * 135 49 19 53.0000000 58.27562 10.0% 35.9 0s 613 171 55.50000 9 150 53.00000 56.74419 7.06% 28.4 5s 629 182 55.50000 14 150 53.00000 56.74419 7.06% 27.7 10s H 798 184 54.0000000 56.74419 5.08% 35.7 11s Cutting planes: Zero half: 152 Explored 1018 nodes (36050 simplex iterations) in 12.36 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.400000000000e+01, best bound 5.400000000000e+01, gap 0.0%