Gurobi 5.0.1 (linux64) logging started Fri Nov 16 05:57:14 2012 Optimize a model with 8119 rows, 3192 columns and 27270 nonzeros Presolve removed 64 rows and 2 columns Presolve time: 0.18s Presolved: 8111 rows, 3190 columns, 30003 nonzeros Variable types: 0 continuous, 3190 integer (3190 binary) Found heuristic solution: objective 56.0000000 Root relaxation: objective 2.333333e+00, 5542 iterations, 0.76 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.33333 0 148 56.00000 2.33333 95.8% - 3s H 0 0 55.0000000 2.33333 95.8% - 3s H 0 0 47.0000000 2.33333 95.0% - 3s H 0 0 5.0000000 2.33333 53.3% - 3s 0 0 3.00000 0 1110 5.00000 3.00000 40.0% - 4s 0 0 3.00000 0 691 5.00000 3.00000 40.0% - 5s H 0 0 4.0000000 3.00000 25.0% - 5s 0 0 3.00000 0 1471 4.00000 3.00000 25.0% - 5s 0 0 3.00000 0 106 4.00000 3.00000 25.0% - 10s 0 0 3.00000 0 123 4.00000 3.00000 25.0% - 14s 0 0 3.00000 0 100 4.00000 3.00000 25.0% - 19s 0 0 3.00000 0 115 4.00000 3.00000 25.0% - 23s 0 0 3.00000 0 78 4.00000 3.00000 25.0% - 26s 0 0 3.00000 0 112 4.00000 3.00000 25.0% - 31s 0 0 3.00000 0 1698 4.00000 3.00000 25.0% - 34s 0 0 3.00000 0 113 4.00000 3.00000 25.0% - 38s 0 2 3.00000 0 113 4.00000 3.00000 25.0% - 41s 4 4 3.00000 1 123 4.00000 3.00000 25.0% 1111 50s 6 6 3.00000 1 127 4.00000 3.00000 25.0% 741 58s 7 6 3.00000 1 108 4.00000 3.00000 25.0% 635 62s 8 7 3.00000 1 195 4.00000 3.00000 25.0% 556 67s 9 8 3.00000 1 132 4.00000 3.00000 25.0% 494 72s 10 8 3.00000 1 110 4.00000 3.00000 25.0% 444 75s 12 10 3.00000 1 132 4.00000 3.00000 25.0% 370 85s 15 12 infeasible 15 4.00000 3.00000 25.0% 10863 93s Cutting planes: Zero half: 7 Explored 17 nodes (342005 simplex iterations) in 94.58 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%