Gurobi 5.0.1 (linux64) logging started Fri Nov 16 03:19:31 2012 Optimize a model with 3730 rows, 1722 columns and 12708 nonzeros Presolve removed 945 rows and 2 columns Presolve time: 0.12s Presolved: 2826 rows, 1720 columns, 11957 nonzeros Variable types: 0 continuous, 1720 integer (1720 binary) Found heuristic solution: objective 41.0000000 Root relaxation: objective 3.000000e+00, 2702 iterations, 0.21 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 579 41.00000 3.00000 92.7% - 0s H 0 0 40.0000000 3.00000 92.5% - 0s H 0 0 25.0000000 3.00000 88.0% - 0s H 0 0 21.0000000 3.00000 85.7% - 0s 0 0 3.00000 0 87 21.00000 3.00000 85.7% - 1s H 0 0 7.0000000 3.00000 57.1% - 1s H 0 0 5.0000000 3.00000 40.0% - 1s 0 0 3.00000 0 98 5.00000 3.00000 40.0% - 1s H 0 0 4.0000000 3.00000 25.0% - 1s 0 0 3.00000 0 81 4.00000 3.00000 25.0% - 2s 0 0 3.00000 0 64 4.00000 3.00000 25.0% - 2s 0 0 3.00000 0 65 4.00000 3.00000 25.0% - 3s 0 0 3.00000 0 76 4.00000 3.00000 25.0% - 4s 0 0 3.00000 0 85 4.00000 3.00000 25.0% - 5s 0 0 3.00000 0 72 4.00000 3.00000 25.0% - 5s 0 0 3.00000 0 58 4.00000 3.00000 25.0% - 6s 0 0 3.00000 0 77 4.00000 3.00000 25.0% - 7s 0 0 3.00000 0 77 4.00000 3.00000 25.0% - 7s 0 2 3.00000 0 75 4.00000 3.00000 25.0% - 8s 5 5 3.00000 1 76 4.00000 3.00000 25.0% 433 10s 10 8 3.00000 1 75 4.00000 3.00000 25.0% 217 15s 15 12 3.00000 1 60 4.00000 3.00000 25.0% 144 20s 19 14 3.00000 1 74 4.00000 3.00000 25.0% 114 25s 20 15 3.00000 1 970 4.00000 3.00000 25.0% 108 34s 21 16 3.00000 1 67 4.00000 3.00000 25.0% 103 35s Cutting planes: Zero half: 17 Explored 32 nodes (181346 simplex iterations) in 37.98 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.000000000000e+00, best bound 4.000000000000e+00, gap 0.0%