Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:38:00 2012 Optimize a model with 588 rows, 154 columns and 1176 nonzeros Presolve removed 132 rows and 0 columns Presolve time: 0.00s Presolved: 456 rows, 154 columns, 1002 nonzeros Variable types: 0 continuous, 154 integer (154 binary) Found heuristic solution: objective 50.0000000 Root relaxation: objective 6.300000e+01, 235 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 0 114 50.00000 63.00000 26.0% - 0s 0 0 62.05556 0 148 50.00000 62.05556 24.1% - 0s H 0 0 53.0000000 62.05556 17.1% - 0s 0 0 61.21410 0 151 53.00000 61.21410 15.5% - 0s 0 0 60.88191 0 150 53.00000 60.88191 14.9% - 0s 0 0 60.67211 0 149 53.00000 60.67211 14.5% - 0s 0 0 60.41173 0 149 53.00000 60.41173 14.0% - 0s 0 0 60.28547 0 152 53.00000 60.28547 13.7% - 0s 0 0 59.95913 0 149 53.00000 59.95913 13.1% - 0s 0 0 59.89231 0 152 53.00000 59.89231 13.0% - 0s 0 0 59.84812 0 152 53.00000 59.84812 12.9% - 0s H 0 0 54.0000000 59.84812 10.8% - 0s 0 0 59.83420 0 152 54.00000 59.83420 10.8% - 0s 0 0 59.83420 0 152 54.00000 59.83420 10.8% - 0s 0 2 59.83295 0 152 54.00000 59.83295 10.8% - 0s * 15 13 10 55.0000000 59.63309 8.42% 39.5 0s * 168 18 7 56.0000000 58.23090 3.98% 30.6 0s Cutting planes: Gomory: 2 Clique: 1 Zero half: 105 Explored 243 nodes (7986 simplex iterations) in 0.37 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.600000000000e+01, best bound 5.600000000000e+01, gap 0.0%