Gurobi 5.0.1 (linux64) logging started Mon Feb 4 16:02:11 2013 Optimize a model with 135 rows, 100 columns and 360 nonzeros Presolve removed 45 rows and 45 columns Presolve time: 0.00s Presolved: 90 rows, 55 columns, 270 nonzeros Variable types: 10 continuous, 45 integer (45 binary) Found heuristic solution: objective 3313.0000000 Root relaxation: objective 4.780000e+02, 44 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 478.00000 0 40 3313.00000 478.00000 85.6% - 0s 0 0 767.32594 0 36 3313.00000 767.32594 76.8% - 0s 0 0 774.61893 0 39 3313.00000 774.61893 76.6% - 0s 0 0 776.00648 0 38 3313.00000 776.00648 76.6% - 0s 0 0 776.11974 0 39 3313.00000 776.11974 76.6% - 0s 0 0 776.11974 0 39 3313.00000 776.11974 76.6% - 0s H 0 0 2391.0000000 776.11974 67.5% - 0s 0 2 778.38073 0 39 2391.00000 778.38073 67.4% - 0s H 27 27 2336.0000000 778.38073 66.7% 8.4 0s * 74 63 24 2332.0000000 893.58752 61.7% 5.7 0s H 182 131 2199.0000000 923.77879 58.0% 5.0 0s * 530 308 12 2095.0000000 1094.00000 47.8% 4.8 0s H 621 352 2088.0000000 1131.60000 45.8% 4.7 0s H 803 424 2047.0000000 1144.00000 44.1% 4.5 0s H 977 465 2046.0000000 1144.00000 44.1% 6.2 0s * 1019 452 30 2044.0000000 1144.00000 44.0% 6.1 0s * 1790 435 30 2033.0000000 1144.00000 43.7% 5.9 0s * 2411 540 29 2032.0000000 1144.00000 43.7% 5.6 0s H 3219 721 2021.0000000 1196.06339 40.8% 5.3 0s Cutting planes: Gomory: 34 Implied bound: 7 MIR: 51 Explored 24067 nodes (79088 simplex iterations) in 1.84 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.021000000000e+03, best bound 2.021000000000e+03, gap 0.0%