Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:54:33 2013 Optimize a model with 43030 rows, 42380 columns and 169130 nonzeros Presolve removed 65 rows and 0 columns Presolve time: 0.19s Presolved: 42965 rows, 42380 columns, 169065 nonzeros Variable types: 42315 continuous, 65 integer (65 binary) Root relaxation: objective 5.135954e+04, 4781 iterations, 1.97 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 51359.5423 0 46 - 51359.5423 - - 2s H 0 0 74617.000000 51359.5423 31.2% - 3s 0 0 58966.8608 0 15 74617.0000 58966.8608 21.0% - 8s H 0 0 71334.000000 58966.8608 17.3% - 8s H 0 0 70165.000000 58966.8608 16.0% - 9s 0 0 61677.3831 0 8 70165.0000 61677.3831 12.1% - 10s H 0 0 69927.000000 61677.3831 11.8% - 10s 0 0 61990.4261 0 6 69927.0000 61990.4261 11.3% - 11s H 0 0 69174.790546 61990.4261 10.4% - 11s H 0 0 67553.000000 61990.4261 8.23% - 11s 0 0 62031.8956 0 5 67553.0000 62031.8956 8.17% - 11s H 0 0 67260.194002 62031.8956 7.77% - 11s H 0 0 65663.000000 62031.8956 5.53% - 11s H 0 0 62176.000000 62031.8956 0.23% - 12s 0 0 62031.8956 0 36 62176.0000 62031.8956 0.23% - 15s 0 0 62031.8956 0 10 62176.0000 62031.8956 0.23% - 18s 0 0 62031.8956 0 6 62176.0000 62031.8956 0.23% - 19s 0 0 62031.8956 0 5 62176.0000 62031.8956 0.23% - 20s 0 2 62033.0233 0 5 62176.0000 62033.0233 0.23% - 21s Cutting planes: Gomory: 3 Implied bound: 41 Explored 7 nodes (18492 simplex iterations) in 21.27 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.217600000000e+04, best bound 6.217052210996e+04, gap 0.0088%