Gurobi 5.0.1 (linux64) logging started Wed Apr 24 02:00:38 2013 Optimize a model with 44352 rows, 43692 columns and 174372 nonzeros Presolve removed 66 rows and 0 columns Presolve time: 0.19s Presolved: 44286 rows, 43692 columns, 174306 nonzeros Variable types: 43626 continuous, 66 integer (66 binary) Root relaxation: objective 5.520427e+04, 5010 iterations, 2.72 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 55204.2672 0 52 - 55204.2672 - - 3s H 0 0 81002.000000 55204.2672 31.8% - 4s 0 0 65735.9989 0 11 81002.0000 65735.9989 18.8% - 8s H 0 0 80711.515331 65735.9989 18.6% - 8s H 0 0 75502.000000 65735.9989 12.9% - 8s 0 0 68260.9405 0 9 75502.0000 68260.9405 9.59% - 9s H 0 0 75431.000000 68260.9405 9.51% - 9s 0 0 68596.3592 0 4 75431.0000 68596.3592 9.06% - 10s H 0 0 72783.159623 68596.3592 5.75% - 10s H 0 0 71583.000000 68596.3592 4.17% - 10s 0 0 68627.2229 0 3 71583.0000 68627.2229 4.13% - 10s H 0 0 70755.000000 68627.2229 3.01% - 10s H 0 0 68773.000000 68627.2229 0.21% - 10s 0 0 68630.1429 0 2 68773.0000 68630.1429 0.21% - 11s 0 2 68631.1250 0 2 68773.0000 68631.1250 0.21% - 12s * 12 6 7 68750.000000 68688.4697 0.09% 83.0 12s * 20 4 4 68748.000000 68691.0000 0.08% 67.3 13s * 21 0 3 68691.000000 68691.0000 0.0% 67.5 13s Cutting planes: Implied bound: 62 Explored 22 nodes (12239 simplex iterations) in 13.19 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.869100000000e+04, best bound 6.869100000000e+04, gap 0.0%