Gurobi 5.0.1 (linux64) logging started Wed Apr 24 12:49:03 2013 Optimize a model with 2310 rows, 441210 columns and 882210 nonzeros Presolve time: 1.33s Presolved: 2310 rows, 441210 columns, 882210 nonzeros Variable types: 441000 continuous, 210 integer (210 binary) Root relaxation: objective 4.329097e+05, 13844 iterations, 1.99 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 432909.743 0 7 - 432909.743 - - 3s H 0 0 466811.00000 432909.743 7.26% - 5s H 0 0 437717.00000 432909.743 1.10% - 6s 0 0 433519.158 0 6 437717.000 433519.158 0.96% - 8s 0 0 433519.158 0 7 437717.000 433519.158 0.96% - 11s 0 0 433522.898 0 6 437717.000 433522.898 0.96% - 13s 0 0 433589.145 0 6 437717.000 433589.145 0.94% - 14s 0 0 433611.120 0 6 437717.000 433611.120 0.94% - 15s 0 0 433619.798 0 5 437717.000 433619.798 0.94% - 16s 0 0 433626.475 0 5 437717.000 433626.475 0.93% - 16s 0 0 433626.507 0 5 437717.000 433626.507 0.93% - 17s 0 0 433626.507 0 5 437717.000 433626.507 0.93% - 18s 0 0 433626.507 0 5 437717.000 433626.507 0.93% - 19s 0 2 433629.624 0 5 437717.000 433629.624 0.93% - 21s 5 7 434342.885 4 3 437717.000 433834.648 0.89% 472 25s H 13 13 437618.00000 433834.648 0.86% 294 28s H 14 13 434883.00000 433834.648 0.24% 276 28s * 27 9 26 434448.00000 433834.648 0.14% 154 29s 28 10 434122.792 2 5 434448.000 433907.469 0.12% 167 31s 47 1 cutoff 5 434448.000 434409.948 0.01% 197 35s Cutting planes: Implied bound: 266 Flow cover: 13 Explored 48 nodes (39789 simplex iterations) in 35.03 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.344480000000e+05, best bound 4.344099475524e+05, gap 0.0088%