Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:38:26 2012 Optimize a model with 589 rows, 155 columns and 1178 nonzeros Presolve removed 115 rows and 3 columns Presolve time: 0.00s Presolved: 474 rows, 152 columns, 1009 nonzeros Variable types: 0 continuous, 152 integer (152 binary) Found heuristic solution: objective 51.0000000 Root relaxation: objective 6.400000e+01, 245 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 64.00000 0 122 51.00000 64.00000 25.5% - 0s H 0 0 52.0000000 64.00000 23.1% - 0s 0 0 63.87500 0 137 52.00000 63.87500 22.8% - 0s 0 0 62.25000 0 150 52.00000 62.25000 19.7% - 0s 0 0 61.64641 0 150 52.00000 61.64641 18.6% - 0s 0 0 61.21875 0 151 52.00000 61.21875 17.7% - 0s 0 0 60.82353 0 146 52.00000 60.82353 17.0% - 0s 0 0 60.58750 0 148 52.00000 60.58750 16.5% - 0s 0 0 60.44643 0 150 52.00000 60.44643 16.2% - 0s 0 0 60.30213 0 151 52.00000 60.30213 16.0% - 0s 0 0 60.19285 0 151 52.00000 60.19285 15.8% - 0s 0 0 60.14800 0 150 52.00000 60.14800 15.7% - 0s 0 0 60.09671 0 151 52.00000 60.09671 15.6% - 0s 0 0 60.09012 0 152 52.00000 60.09012 15.6% - 0s 0 0 60.09012 0 150 52.00000 60.09012 15.6% - 0s H 0 0 54.0000000 60.09012 11.3% - 0s 0 2 60.09012 0 150 54.00000 60.09012 11.3% - 0s * 226 37 10 55.0000000 58.33333 6.06% 39.7 0s Cutting planes: Clique: 1 Zero half: 195 Explored 496 nodes (19965 simplex iterations) in 0.83 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%