Gurobi 5.0.1 (linux64) logging started Tue Nov 20 13:48:48 2012 Optimize a model with 863 rows, 184 columns and 1726 nonzeros Presolve removed 215 rows and 2 columns Presolve time: 0.00s Presolved: 648 rows, 182 columns, 1442 nonzeros Variable types: 0 continuous, 182 integer (182 binary) Found heuristic solution: objective 53.0000000 Root relaxation: objective 7.141250e+01, 418 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 71.41250 0 164 53.00000 71.41250 34.7% - 0s 0 0 70.18182 0 166 53.00000 70.18182 32.4% - 0s 0 0 69.61111 0 178 53.00000 69.61111 31.3% - 0s 0 0 69.24638 0 175 53.00000 69.24638 30.7% - 0s 0 0 68.87760 0 178 53.00000 68.87760 30.0% - 0s 0 0 68.71388 0 178 53.00000 68.71388 29.6% - 0s H 0 0 54.0000000 68.71388 27.2% - 0s 0 0 68.37169 0 178 54.00000 68.37169 26.6% - 0s 0 0 68.16236 0 180 54.00000 68.16236 26.2% - 0s 0 0 68.11235 0 180 54.00000 68.11235 26.1% - 0s H 0 0 55.0000000 68.11235 23.8% - 0s 0 0 68.01337 0 181 55.00000 68.01337 23.7% - 0s H 0 0 56.0000000 68.01337 21.5% - 0s H 0 0 57.0000000 68.01337 19.3% - 0s 0 0 67.95208 0 180 57.00000 67.95208 19.2% - 0s 0 0 67.91628 0 181 57.00000 67.91628 19.2% - 0s 0 0 67.82618 0 181 57.00000 67.82618 19.0% - 0s 0 0 67.73097 0 181 57.00000 67.73097 18.8% - 0s 0 0 67.71582 0 181 57.00000 67.71582 18.8% - 0s 0 0 67.71582 0 179 57.00000 67.71582 18.8% - 0s 0 2 67.71208 0 179 57.00000 67.71208 18.8% - 0s H 441 192 58.0000000 65.59276 13.1% 49.6 1s 610 269 59.27273 10 177 58.00000 65.23971 12.5% 48.9 5s H 1624 495 59.0000000 64.48654 9.30% 49.0 8s 2203 665 61.19595 20 138 59.00000 63.71750 8.00% 46.9 10s 4940 826 cutoff 32 59.00000 61.87500 4.87% 40.6 15s Cutting planes: Gomory: 5 Zero half: 70 Explored 7276 nodes (264992 simplex iterations) in 17.93 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.900000000000e+01, best bound 5.900000000000e+01, gap 0.0%