current bounds on the number of colors: 0 -- 42 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:01:06 2012 Optimize a model with 9177 rows, 1317 columns and 28287 nonzeros Presolve time: 0.03s Presolved: 9177 rows, 1317 columns, 28287 nonzeros Variable types: 0 continuous, 1317 integer (1317 binary) Root relaxation: objective 0.000000e+00, 105 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (240 simplex iterations) in 0.06 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0% current bounds on the number of colors: 0 -- 21 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:01:06 2012 Optimize a model with 4392 rows, 855 columns and 13470 nonzeros Presolve time: 0.01s Presolved: 4392 rows, 855 columns, 13470 nonzeros Variable types: 0 continuous, 855 integer (855 binary) Root relaxation: objective 0.000000e+00, 91 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 24 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (814 simplex iterations) in 0.05 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0% current bounds on the number of colors: 0 -- 10 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:01:06 2012 Optimize a model with 2217 rows, 645 columns and 6735 nonzeros Presolve time: 0.01s Presolved: 2217 rows, 645 columns, 6735 nonzeros Variable types: 0 continuous, 645 integer (645 binary) Root relaxation: objective 0.000000e+00, 89 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 54 - 0.00000 - - 0s 0 0 0.00000 0 80 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (1408 simplex iterations) in 0.15 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound 1.000000000000e+00, gap - current bounds on the number of colors: 5 -- 10 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:01:07 2012 Optimize a model with 3087 rows, 729 columns and 9429 nonzeros Presolve time: 0.01s Presolved: 3087 rows, 729 columns, 9429 nonzeros Variable types: 0 continuous, 729 integer (729 binary) Root relaxation: objective 0.000000e+00, 86 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 28 - 0.00000 - - 0s 0 0 0.00000 0 26 - 0.00000 - - 0s 0 0 0.00000 0 161 - 0.00000 - - 0s 0 0 0.00000 0 185 - 0.00000 - - 0s 0 0 0.00000 0 183 - 0.00000 - - 0s 0 0 0.00000 0 150 - 0.00000 - - 1s 0 0 0.00000 0 149 - 0.00000 - - 1s 0 0 0.00000 0 133 - 0.00000 - - 1s 0 0 0.00000 0 149 - 0.00000 - - 2s 0 0 0.00000 0 147 - 0.00000 - - 2s 0 0 0.00000 0 162 - 0.00000 - - 2s 0 0 0.00000 0 162 - 0.00000 - - 2s 0 2 0.00000 0 162 - 0.00000 - - 3s Cutting planes: Clique: 41 Zero half: 6 Explored 9 nodes (24404 simplex iterations) in 3.25 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound -, gap - current bounds on the number of colors: 7 -- 10 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:01:10 2012 Optimize a model with 3522 rows, 771 columns and 10776 nonzeros Presolve time: 0.01s Presolved: 3522 rows, 771 columns, 10776 nonzeros Variable types: 0 continuous, 771 integer (771 binary) Root relaxation: objective 0.000000e+00, 84 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 34 - 0.00000 - - 0s 0 0 0.00000 0 34 - 0.00000 - - 0s 0 0 0.00000 0 60 - 0.00000 - - 0s 0 0 0.00000 0 138 - 0.00000 - - 0s 0 0 0.00000 0 85 - 0.00000 - - 0s * 0 0 0 0.0000000 0.00000 0.0% - 0s Cutting planes: Clique: 28 Zero half: 78 Explored 0 nodes (8168 simplex iterations) in 0.82 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0% optimal solution found: number of colors: 8