current bounds on the number of colors: 0 -- 48 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:08:30 2012 Optimize a model with 12984 rows, 1691 columns and 39960 nonzeros Presolve time: 0.05s Presolved: 12984 rows, 1691 columns, 39960 nonzeros Variable types: 0 continuous, 1691 integer (1691 binary) Root relaxation: objective 0.000000e+00, 107 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 (399 simplex iterations) in 0.09 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 -- 24 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:08:31 2012 Optimize a model with 6516 rows, 1115 columns and 19980 nonzeros Presolve time: 0.02s Presolved: 6516 rows, 1115 columns, 19980 nonzeros Variable types: 0 continuous, 1115 integer (1115 binary) Root relaxation: objective 0.000000e+00, 110 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 30 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (639 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 -- 12 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:08:31 2012 Optimize a model with 3282 rows, 827 columns and 9990 nonzeros Presolve time: 0.01s Presolved: 3282 rows, 827 columns, 9990 nonzeros Variable types: 0 continuous, 827 integer (827 binary) Root relaxation: objective 0.000000e+00, 99 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 60 - 0.00000 - - 0s 0 0 0.00000 0 52 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (2465 simplex iterations) in 0.23 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: 6 -- 12 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:08:31 2012 Optimize a model with 4899 rows, 971 columns and 14985 nonzeros Presolve time: 0.01s Presolved: 4899 rows, 971 columns, 14985 nonzeros Variable types: 0 continuous, 971 integer (971 binary) Root relaxation: objective 0.000000e+00, 104 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 39 - 0.00000 - - 0s 0 0 0.00000 0 40 - 0.00000 - - 0s 0 0 0.00000 0 130 - 0.00000 - - 0s 0 0 0.00000 0 163 - 0.00000 - - 0s 0 0 0.00000 0 131 - 0.00000 - - 0s 0 0 0.00000 0 93 - 0.00000 - - 1s * 0 0 0 0.0000000 0.00000 0.0% - 1s Cutting planes: Clique: 16 Zero half: 32 Explored 0 nodes (11040 simplex iterations) in 1.22 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: 6 -- 9 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:08:32 2012 Optimize a model with 3821 rows, 875 columns and 11655 nonzeros Presolve time: 0.01s Presolved: 3821 rows, 875 columns, 11655 nonzeros Variable types: 0 continuous, 875 integer (875 binary) Root relaxation: objective 0.000000e+00, 99 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 48 - 0.00000 - - 0s 0 0 0.00000 0 42 - 0.00000 - - 0s 0 0 0.00000 0 221 - 0.00000 - - 0s 0 0 0.00000 0 264 - 0.00000 - - 0s 0 0 0.00000 0 234 - 0.00000 - - 1s 0 0 0.00000 0 248 - 0.00000 - - 2s 0 0 0.00000 0 252 - 0.00000 - - 2s 0 0 0.00000 0 252 - 0.00000 - - 2s 0 2 0.00000 0 252 - 0.00000 - - 3s Cutting planes: Clique: 62 Zero half: 11 Explored 11 nodes (22619 simplex iterations) in 3.68 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 -- 9 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:08:36 2012 Optimize a model with 4360 rows, 923 columns and 13320 nonzeros Presolve time: 0.01s Presolved: 4360 rows, 923 columns, 13320 nonzeros Variable types: 0 continuous, 923 integer (923 binary) Root relaxation: objective 0.000000e+00, 97 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 52 - 0.00000 - - 0s 0 0 0.00000 0 34 - 0.00000 - - 0s 0 0 0.00000 0 176 - 0.00000 - - 0s 0 0 0.00000 0 203 - 0.00000 - - 0s 0 0 0.00000 0 162 - 0.00000 - - 1s 0 0 0.00000 0 173 - 0.00000 - - 1s 0 0 0.00000 0 207 - 0.00000 - - 1s 0 0 0.00000 0 220 - 0.00000 - - 2s 0 0 0.00000 0 209 - 0.00000 - - 2s 0 2 0.00000 0 209 - 0.00000 - - 3s Cutting planes: Clique: 92 Zero half: 5 Explored 63 nodes (30045 simplex iterations) in 3.82 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound -, gap - optimal solution found: number of colors: 9