Gurobi 5.0.1 (linux64) logging started Tue Nov 20 13:10:40 2012 Optimize a model with 788 rows, 174 columns and 1576 nonzeros Presolve removed 172 rows and 0 columns Presolve time: 0.00s Presolved: 616 rows, 174 columns, 1352 nonzeros Variable types: 0 continuous, 174 integer (174 binary) Found heuristic solution: objective 48.0000000 Root relaxation: objective 6.925000e+01, 358 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 69.25000 0 146 48.00000 69.25000 44.3% - 0s 0 0 68.00000 0 172 48.00000 68.00000 41.7% - 0s H 0 0 52.0000000 68.00000 30.8% - 0s 0 0 67.15138 0 168 52.00000 67.15138 29.1% - 0s 0 0 66.62026 0 171 52.00000 66.62026 28.1% - 0s 0 0 65.86486 0 167 52.00000 65.86486 26.7% - 0s 0 0 65.63671 0 169 52.00000 65.63671 26.2% - 0s 0 0 65.31995 0 171 52.00000 65.31995 25.6% - 0s 0 0 65.25057 0 168 52.00000 65.25057 25.5% - 0s 0 0 65.09821 0 170 52.00000 65.09821 25.2% - 0s 0 0 65.05076 0 168 52.00000 65.05076 25.1% - 0s 0 0 64.98545 0 169 52.00000 64.98545 25.0% - 0s 0 0 64.95703 0 173 52.00000 64.95703 24.9% - 0s 0 0 64.95703 0 173 52.00000 64.95703 24.9% - 0s H 0 0 55.0000000 64.95703 18.1% - 0s 0 2 64.95511 0 173 55.00000 64.95511 18.1% - 0s H 191 95 56.0000000 63.92402 14.2% 46.1 0s * 336 137 22 57.0000000 63.19565 10.9% 44.8 0s * 561 174 16 58.0000000 62.55190 7.85% 43.2 1s 712 210 60.37423 9 171 58.00000 62.22481 7.28% 42.5 5s 722 217 60.96970 6 173 58.00000 62.22481 7.28% 41.9 10s 2090 24 59.24355 24 133 58.00000 59.43478 2.47% 44.3 15s Cutting planes: Gomory: 3 Zero half: 199 Explored 2133 nodes (95081 simplex iterations) in 15.04 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%