Gurobi 5.0.1 (linux64) logging started Sun Dec 9 10:43:44 2012 Optimize a model with 3000 rows, 2970 columns and 11328 nonzeros Presolve removed 286 rows and 32 columns Presolve time: 0.02s Presolved: 2714 rows, 2938 columns, 10741 nonzeros Variable types: 2767 continuous, 171 integer (171 binary) Root relaxation: objective 6.614258e+04, 342 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 66142.5837 0 25 - 66142.5837 - - 0s H 0 0 70518.000000 66142.5837 6.20% - 0s H 0 0 68403.000000 66142.5837 3.30% - 0s 0 0 66190.4620 0 41 68403.0000 66190.4620 3.23% - 0s 0 0 66210.1532 0 39 68403.0000 66210.1532 3.21% - 0s 0 0 66228.2662 0 41 68403.0000 66228.2662 3.18% - 0s 0 0 66230.8735 0 45 68403.0000 66230.8735 3.18% - 0s 0 0 66230.9058 0 45 68403.0000 66230.9058 3.18% - 0s H 0 0 67827.000000 66230.9058 2.35% - 0s 0 2 66233.2098 0 45 67827.0000 66233.2098 2.35% - 0s H 27 27 67243.000000 66294.1528 1.41% 5.5 0s * 56 47 48 67239.000000 66294.1528 1.41% 5.4 0s H 216 149 67079.000000 66358.1770 1.07% 5.3 0s H 222 151 67078.000000 66358.1770 1.07% 5.2 0s * 223 144 50 67047.000000 66358.1770 1.03% 5.2 0s H 1151 531 67022.000000 66508.8676 0.77% 6.3 1s * 1162 509 59 67014.000000 66508.8676 0.75% 6.3 1s H 1452 539 66998.000000 66540.4502 0.68% 5.9 1s * 1595 549 59 66989.000000 66543.7434 0.66% 5.7 1s H 4947 1856 66955.000000 66648.2477 0.46% 5.0 3s * 4960 1825 51 66947.000000 66648.2477 0.45% 5.0 3s 7300 2456 66935.3647 42 3 66947.0000 66698.6958 0.37% 4.7 5s H 7453 2367 66934.000000 66701.0934 0.35% 4.7 5s * 7454 2283 45 66925.000000 66701.0934 0.33% 4.7 5s H11202 2394 66912.000000 66758.6336 0.23% 4.6 7s 16263 1644 cutoff 28 66912.0000 66835.2279 0.11% 4.3 10s Cutting planes: Gomory: 1 Flow cover: 14 Explored 19271 nodes (79186 simplex iterations) in 11.78 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.691200000000e+04, best bound 6.690534860015e+04, gap 0.0099%