current bounds on the number of colors: 0 -- 48 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:08:18 2012 Optimize a model with 13512 rows, 1713 columns and 41544 nonzeros Presolve time: 0.05s Presolved: 13512 rows, 1713 columns, 41544 nonzeros Variable types: 0 continuous, 1713 integer (1713 binary) Root relaxation: objective 0.000000e+00, 99 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 (359 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 18:08:18 2012 Optimize a model with 6780 rows, 1137 columns and 20772 nonzeros Presolve time: 0.02s Presolved: 6780 rows, 1137 columns, 20772 nonzeros Variable types: 0 continuous, 1137 integer (1137 binary) Root relaxation: objective 0.000000e+00, 114 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 (285 simplex iterations) in 0.04 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 18:08:19 2012 Optimize a model with 3414 rows, 849 columns and 10386 nonzeros Presolve time: 0.01s Presolved: 3414 rows, 849 columns, 10386 nonzeros Variable types: 0 continuous, 849 integer (849 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 96 - 0.00000 - - 0s 0 0 0.00000 0 52 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (2006 simplex iterations) in 0.28 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 18:08:19 2012 Optimize a model with 5097 rows, 993 columns and 15579 nonzeros Presolve time: 0.01s Presolved: 5097 rows, 993 columns, 15579 nonzeros Variable types: 0 continuous, 993 integer (993 binary) Root relaxation: objective 0.000000e+00, 100 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 55 - 0.00000 - - 0s 0 0 0.00000 0 67 - 0.00000 - - 0s Cutting planes: Clique: 12 Explored 0 nodes (2149 simplex iterations) in 0.18 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 18:08:19 2012 Optimize a model with 3975 rows, 897 columns and 12117 nonzeros Presolve time: 0.01s Presolved: 3975 rows, 897 columns, 12117 nonzeros Variable types: 0 continuous, 897 integer (897 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 62 - 0.00000 - - 0s 0 0 0.00000 0 40 - 0.00000 - - 0s 0 0 0.00000 0 233 - 0.00000 - - 0s 0 0 0.00000 0 274 - 0.00000 - - 0s 0 0 0.00000 0 228 - 0.00000 - - 1s 0 0 0.00000 0 261 - 0.00000 - - 2s 0 0 0.00000 0 256 - 0.00000 - - 2s 0 0 0.00000 0 271 - 0.00000 - - 3s 0 0 0.00000 0 237 - 0.00000 - - 4s 0 0 0.00000 0 275 - 0.00000 - - 4s 0 0 0.00000 0 275 - 0.00000 - - 4s 0 2 0.00000 0 244 - 0.00000 - - 5s Cutting planes: Clique: 76 Zero half: 7 Explored 9 nodes (31398 simplex iterations) in 5.69 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 18:08:25 2012 Optimize a model with 4536 rows, 945 columns and 13848 nonzeros Presolve time: 0.01s Presolved: 4536 rows, 945 columns, 13848 nonzeros Variable types: 0 continuous, 945 integer (945 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 58 - 0.00000 - - 0s 0 0 0.00000 0 43 - 0.00000 - - 0s 0 0 0.00000 0 149 - 0.00000 - - 0s 0 0 0.00000 0 225 - 0.00000 - - 0s 0 0 0.00000 0 182 - 0.00000 - - 1s 0 0 0.00000 0 157 - 0.00000 - - 1s 0 0 0.00000 0 164 - 0.00000 - - 2s 0 0 0.00000 0 132 - 0.00000 - - 2s 0 0 0.00000 0 205 - 0.00000 - - 3s 0 0 0.00000 0 190 - 0.00000 - - 3s 0 0 0.00000 0 214 - 0.00000 - - 3s 0 0 0.00000 0 214 - 0.00000 - - 4s 0 2 0.00000 0 214 - 0.00000 - - 4s 43 5 0.00000 9 150 - 0.00000 - 159 5s Cutting planes: Clique: 117 Zero half: 5 Explored 55 nodes (39042 simplex iterations) in 5.08 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