Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:47:21 2012 Optimize a model with 664 rows, 163 columns and 1328 nonzeros Presolve removed 146 rows and 2 columns Presolve time: 0.00s Presolved: 518 rows, 161 columns, 1133 nonzeros Variable types: 0 continuous, 161 integer (161 binary) Found heuristic solution: objective 49.0000000 Root relaxation: objective 6.750000e+01, 267 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 67.50000 0 131 49.00000 67.50000 37.8% - 0s 0 0 66.20000 0 154 49.00000 66.20000 35.1% - 0s H 0 0 53.0000000 66.20000 24.9% - 0s 0 0 65.42308 0 157 53.00000 65.42308 23.4% - 0s 0 0 64.70042 0 160 53.00000 64.70042 22.1% - 0s 0 0 64.09596 0 160 53.00000 64.09596 20.9% - 0s 0 0 63.66015 0 160 53.00000 63.66015 20.1% - 0s 0 0 63.51347 0 159 53.00000 63.51347 19.8% - 0s 0 0 63.44781 0 159 53.00000 63.44781 19.7% - 0s 0 0 63.34447 0 160 53.00000 63.34447 19.5% - 0s 0 0 63.22421 0 160 53.00000 63.22421 19.3% - 0s 0 0 63.05892 0 160 53.00000 63.05892 19.0% - 0s 0 0 62.95855 0 161 53.00000 62.95855 18.8% - 0s 0 0 62.88133 0 161 53.00000 62.88133 18.6% - 0s 0 0 62.79475 0 160 53.00000 62.79475 18.5% - 0s 0 0 62.75896 0 160 53.00000 62.75896 18.4% - 0s 0 0 62.75896 0 160 53.00000 62.75896 18.4% - 0s H 0 0 54.0000000 62.75896 16.2% - 0s 0 2 62.75873 0 159 54.00000 62.75873 16.2% - 0s * 41 25 16 55.0000000 62.39163 13.4% 40.6 0s * 264 87 10 56.0000000 61.11325 9.13% 40.2 0s 613 175 59.51351 7 159 56.00000 60.10800 7.34% 38.2 5s H 623 172 57.0000000 60.10800 5.45% 37.6 7s Cutting planes: Gomory: 2 Clique: 1 Zero half: 179 Explored 1043 nodes (46285 simplex iterations) in 8.92 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.700000000000e+01, best bound 5.700000000000e+01, gap 0.0%