Gurobi 5.0.1 (linux64) logging started Wed Apr 24 12:20:30 2013 Optimize a model with 1760 rows, 256160 columns and 512160 nonzeros Presolve time: 0.67s Presolved: 1760 rows, 256160 columns, 512160 nonzeros Variable types: 256000 continuous, 160 integer (160 binary) Root relaxation: objective 3.099496e+05, 8951 iterations, 0.82 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 309949.601 0 6 - 309949.601 - - 1s H 0 0 336031.00000 309949.601 7.76% - 2s 0 0 310538.951 0 4 336031.000 310538.951 7.59% - 4s 0 0 310623.656 0 3 336031.000 310623.656 7.56% - 4s H 0 0 327556.04167 310623.656 5.17% - 4s H 0 0 326630.00000 310623.656 4.90% - 5s 0 0 310632.613 0 3 326630.000 310632.613 4.90% - 5s H 0 0 326457.00000 310632.613 4.85% - 5s 0 0 310638.894 0 3 326457.000 310638.894 4.85% - 6s H 0 0 325404.00000 310638.894 4.54% - 6s 0 0 310652.126 0 5 325404.000 310652.126 4.53% - 6s 0 0 310652.158 0 5 325404.000 310652.158 4.53% - 7s 0 0 310656.585 0 3 325404.000 310656.585 4.53% - 7s 0 0 310656.585 0 3 325404.000 310656.585 4.53% - 8s 0 0 310656.585 0 3 325404.000 310656.585 4.53% - 8s 0 0 310656.585 0 3 325404.000 310656.585 4.53% - 9s 0 0 310656.585 0 3 325404.000 310656.585 4.53% - 9s 0 2 310687.529 0 3 325404.000 310687.529 4.52% - 11s H 3 3 325086.83584 310850.739 4.38% 129 12s H 4 4 318711.33333 310856.430 2.46% 116 12s H 5 5 316328.00000 310880.695 1.72% 127 13s H 6 6 311424.00000 310880.695 0.17% 133 13s H 8 5 311367.00000 310880.695 0.16% 140 13s H 9 6 311289.00000 310880.695 0.13% 127 13s H 11 6 311264.48168 310880.695 0.12% 116 13s * 14 6 12 311238.00000 310880.695 0.11% 95.5 14s 18 3 cutoff 4 311238.000 310969.477 0.09% 146 15s Cutting planes: Implied bound: 122 Flow cover: 8 Explored 26 nodes (13442 simplex iterations) in 15.72 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.112380000000e+05, best bound 3.112380000000e+05, gap 0.0%