Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:54:25 2012 Optimize a model with 757 rows, 167 columns and 1514 nonzeros Presolve removed 196 rows and 0 columns Presolve time: 0.00s Presolved: 561 rows, 167 columns, 1259 nonzeros Variable types: 0 continuous, 167 integer (167 binary) Found heuristic solution: objective 53.0000000 Root relaxation: objective 6.504630e+01, 350 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 65.04630 0 157 53.00000 65.04630 22.7% - 0s H 0 0 56.0000000 65.04630 16.2% - 0s H 0 0 58.0000000 65.04630 12.1% - 0s 0 0 64.43797 0 151 58.00000 64.43797 11.1% - 0s 0 0 64.08288 0 163 58.00000 64.08288 10.5% - 0s 0 0 63.73340 0 166 58.00000 63.73340 9.89% - 0s 0 0 63.28067 0 163 58.00000 63.28067 9.10% - 0s 0 0 62.69403 0 162 58.00000 62.69403 8.09% - 0s 0 0 62.53023 0 166 58.00000 62.53023 7.81% - 0s 0 0 62.46954 0 165 58.00000 62.46954 7.71% - 0s 0 0 62.39448 0 165 58.00000 62.39448 7.58% - 0s 0 0 62.37183 0 164 58.00000 62.37183 7.54% - 0s 0 0 62.32451 0 165 58.00000 62.32451 7.46% - 0s 0 0 62.21113 0 163 58.00000 62.21113 7.26% - 0s 0 0 62.15369 0 164 58.00000 62.15369 7.16% - 0s 0 0 62.09183 0 164 58.00000 62.09183 7.05% - 0s 0 0 62.01866 0 165 58.00000 62.01866 6.93% - 0s 0 0 61.98945 0 165 58.00000 61.98945 6.88% - 0s 0 0 61.98945 0 162 58.00000 61.98945 6.88% - 0s 0 2 61.98837 0 159 58.00000 61.98837 6.88% - 0s Cutting planes: Zero half: 101 Explored 168 nodes (10242 simplex iterations) in 0.55 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.800000000000e+01, best bound 5.800000000000e+01, gap 0.0%