current bounds on the number of colors: 0 -- 47 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:06:28 2012 Optimize a model with 12398 rows, 1618 columns and 38134 nonzeros Presolve time: 0.05s Presolved: 12398 rows, 1618 columns, 38134 nonzeros Variable types: 0 continuous, 1618 integer (1618 binary) Root relaxation: objective 0.000000e+00, 108 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 (408 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 -- 23 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:06:29 2012 Optimize a model with 5954 rows, 1054 columns and 18238 nonzeros Presolve time: 0.02s Presolved: 5954 rows, 1054 columns, 18238 nonzeros Variable types: 0 continuous, 1054 integer (1054 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 24 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1054 simplex iterations) in 0.08 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 -- 11 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:06:29 2012 Optimize a model with 2732 rows, 772 columns and 8290 nonzeros Presolve time: 0.01s Presolved: 2732 rows, 772 columns, 8290 nonzeros Variable types: 0 continuous, 772 integer (772 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 82 - 0.00000 - - 0s 0 0 0.00000 0 80 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (2088 simplex iterations) in 0.24 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 -- 11 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:06:29 2012 Optimize a model with 4343 rows, 913 columns and 13264 nonzeros Presolve time: 0.01s Presolved: 4343 rows, 913 columns, 13264 nonzeros Variable types: 0 continuous, 913 integer (913 binary) Root relaxation: objective 0.000000e+00, 94 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 44 - 0.00000 - - 0s 0 0 0.00000 0 26 - 0.00000 - - 0s 0 0 0.00000 0 131 - 0.00000 - - 0s 0 0 0.00000 0 183 - 0.00000 - - 0s 0 0 0.00000 0 209 - 0.00000 - - 1s 0 0 0.00000 0 210 - 0.00000 - - 1s 0 0 0.00000 0 191 - 0.00000 - - 2s 0 0 0.00000 0 155 - 0.00000 - - 2s 0 0 0.00000 0 167 - 0.00000 - - 3s 0 0 0.00000 0 167 - 0.00000 - - 3s 0 2 0.00000 0 167 - 0.00000 - - 4s Cutting planes: Clique: 101 Zero half: 2 Explored 45 nodes (31637 simplex iterations) in 4.57 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: 8 -- 11 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:06:34 2012 Optimize a model with 4880 rows, 960 columns and 14922 nonzeros Presolve time: 0.01s Presolved: 4880 rows, 960 columns, 14922 nonzeros Variable types: 0 continuous, 960 integer (960 binary) Root relaxation: objective 0.000000e+00, 107 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 69 - 0.00000 - - 0s 0 0 0.00000 0 42 - 0.00000 - - 0s 0 0 0.00000 0 125 - 0.00000 - - 0s 0 0 0.00000 0 174 - 0.00000 - - 0s 0 0 0.00000 0 172 - 0.00000 - - 0s 0 0 0.00000 0 92 - 0.00000 - - 1s 0 0 0.00000 0 65 - 0.00000 - - 1s * 0 0 0 0.0000000 0.00000 0.0% - 1s Cutting planes: Clique: 21 Zero half: 29 Explored 0 nodes (16120 simplex iterations) in 1.90 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: 9