Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:12 2012 Optimize a model with 301 rows, 105 columns and 602 nonzeros Presolve removed 84 rows and 5 columns Presolve time: 0.00s Presolved: 217 rows, 100 columns, 468 nonzeros Variable types: 0 continuous, 100 integer (100 binary) Found heuristic solution: objective 37.0000000 Root relaxation: objective 4.450000e+01, 160 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 44.50000 0 75 37.00000 44.50000 20.3% - 0s H 0 0 39.0000000 44.50000 14.1% - 0s 0 0 43.83333 0 87 39.00000 43.83333 12.4% - 0s 0 0 43.50000 0 94 39.00000 43.50000 11.5% - 0s 0 0 43.33333 0 97 39.00000 43.33333 11.1% - 0s 0 0 42.92857 0 96 39.00000 42.92857 10.1% - 0s 0 0 42.75000 0 89 39.00000 42.75000 9.62% - 0s 0 0 42.66667 0 95 39.00000 42.66667 9.40% - 0s 0 0 42.61111 0 97 39.00000 42.61111 9.26% - 0s 0 0 42.61111 0 96 39.00000 42.61111 9.26% - 0s 0 0 42.57971 0 98 39.00000 42.57971 9.18% - 0s 0 0 42.57692 0 97 39.00000 42.57692 9.17% - 0s H 0 0 40.0000000 42.57692 6.44% - 0s 0 0 42.57692 0 97 40.00000 42.57692 6.44% - 0s 0 0 42.57692 0 95 40.00000 42.57692 6.44% - 0s 0 2 42.57692 0 95 40.00000 42.57692 6.44% - 0s * 16 3 8 41.0000000 42.48387 3.62% 15.9 0s Cutting planes: Clique: 1 Zero half: 32 Explored 32 nodes (1032 simplex iterations) in 0.07 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.100000000000e+01, best bound 4.100000000000e+01, gap 0.0%