Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:41:00 2012 Optimize a model with 606 rows, 158 columns and 1212 nonzeros Presolve removed 111 rows and 0 columns Presolve time: 0.00s Presolved: 495 rows, 158 columns, 1057 nonzeros Variable types: 0 continuous, 158 integer (158 binary) Found heuristic solution: objective 47.0000000 Root relaxation: objective 6.550000e+01, 263 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 65.50000 0 127 47.00000 65.50000 39.4% - 0s H 0 0 49.0000000 65.50000 33.7% - 0s 0 0 64.48338 0 157 49.00000 64.48338 31.6% - 0s 0 0 63.82022 0 156 49.00000 63.82022 30.2% - 0s H 0 0 50.0000000 63.82022 27.6% - 0s 0 0 62.71429 0 153 50.00000 62.71429 25.4% - 0s 0 0 62.42431 0 156 50.00000 62.42431 24.8% - 0s 0 0 62.27282 0 156 50.00000 62.27282 24.5% - 0s 0 0 62.11827 0 156 50.00000 62.11827 24.2% - 0s 0 0 61.73737 0 157 50.00000 61.73737 23.5% - 0s 0 0 61.58220 0 157 50.00000 61.58220 23.2% - 0s 0 0 61.50563 0 158 50.00000 61.50563 23.0% - 0s 0 0 61.43958 0 158 50.00000 61.43958 22.9% - 0s 0 0 61.41099 0 158 50.00000 61.41099 22.8% - 0s 0 0 61.41099 0 157 50.00000 61.41099 22.8% - 0s H 0 0 51.0000000 61.41099 20.4% - 0s 0 2 61.41092 0 157 51.00000 61.41092 20.4% - 0s H 24 24 52.0000000 61.24903 17.8% 42.3 0s H 60 34 53.0000000 60.76340 14.6% 41.9 0s * 62 28 6 55.0000000 60.76340 10.5% 42.4 0s 615 141 56.90000 12 157 55.00000 58.71198 6.75% 37.1 5s 628 150 58.40299 13 157 55.00000 58.71198 6.75% 36.3 10s 645 163 58.71198 11 156 55.00000 58.71198 6.75% 40.9 15s Cutting planes: Zero half: 194 Explored 1683 nodes (66056 simplex iterations) in 17.29 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.500000000000e+01, best bound 5.500000000000e+01, gap 0.0%