current bounds on the number of colors: 0 -- 58 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:16:27 2012 Optimize a model with 23374 rows, 2486 columns and 71630 nonzeros Presolve time: 0.10s Presolved: 23374 rows, 2486 columns, 71630 nonzeros Variable types: 0 continuous, 2486 integer (2486 binary) Root relaxation: objective 0.000000e+00, 141 iterations, 0.02 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 (448 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: 0 -- 29 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:16:28 2012 Optimize a model with 11314 rows, 1616 columns and 34580 nonzeros Presolve time: 0.03s Presolved: 11314 rows, 1616 columns, 34580 nonzeros Variable types: 0 continuous, 1616 integer (1616 binary) Root relaxation: objective 0.000000e+00, 128 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 (1087 simplex iterations) in 0.11 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 -- 14 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:16:28 2012 Optimize a model with 5686 rows, 1210 columns and 17290 nonzeros Presolve time: 0.01s Presolved: 5686 rows, 1210 columns, 17290 nonzeros Variable types: 0 continuous, 1210 integer (1210 binary) Root relaxation: objective 0.000000e+00, 118 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 94 - 0.00000 - - 0s 0 0 0.00000 0 73 - 0.00000 - - 0s 0 0 0.00000 0 334 - 0.00000 - - 1s 0 0 0.00000 0 375 - 0.00000 - - 1s 0 0 0.00000 0 334 - 0.00000 - - 2s 0 0 0.00000 0 356 - 0.00000 - - 4s 0 0 0.00000 0 349 - 0.00000 - - 5s 0 0 0.00000 0 364 - 0.00000 - - 7s 0 0 0.00000 0 358 - 0.00000 - - 7s 0 0 infeasible 0 - 0.10000 - - 8s Cutting planes: Clique: 115 Zero half: 129 Explored 0 nodes (33978 simplex iterations) in 8.10 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: 7 -- 14 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:16:36 2012 Optimize a model with 8098 rows, 1384 columns and 24700 nonzeros Presolve time: 0.02s Presolved: 8098 rows, 1384 columns, 24700 nonzeros Variable types: 0 continuous, 1384 integer (1384 binary) Root relaxation: objective 0.000000e+00, 132 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 32 - 0.00000 - - 0s 0 0 0.00000 0 47 - 0.00000 - - 0s 0 0 0.00000 0 144 - 0.00000 - - 1s 0 0 0.00000 0 185 - 0.00000 - - 1s 0 0 0.00000 0 124 - 0.00000 - - 2s 0 0 0.00000 0 75 - 0.00000 - - 2s 0 0 0.00000 0 181 - 0.00000 - - 3s 0 0 0.00000 0 239 - 0.00000 - - 4s 0 0 0.00000 0 246 - 0.00000 - - 5s 0 0 0.00000 0 244 - 0.00000 - - 5s 0 2 0.00000 0 244 - 0.00000 - - 5s * 233 6 27 0.0000000 0.00000 0.0% 77.0 7s Cutting planes: Clique: 27 Zero half: 15 Explored 234 nodes (48997 simplex iterations) in 7.18 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: 7 -- 10 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:16:44 2012 Optimize a model with 6490 rows, 1268 columns and 19760 nonzeros Presolve time: 0.02s Presolved: 6490 rows, 1268 columns, 19760 nonzeros Variable types: 0 continuous, 1268 integer (1268 binary) Root relaxation: objective 0.000000e+00, 132 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 50 - 0.00000 - - 0s 0 0 0.00000 0 50 - 0.00000 - - 0s 0 0 0.00000 0 238 - 0.00000 - - 1s 0 0 0.00000 0 301 - 0.00000 - - 1s 0 0 0.00000 0 273 - 0.00000 - - 3s 0 0 0.00000 0 278 - 0.00000 - - 4s 0 0 0.00000 0 302 - 0.00000 - - 5s 0 0 0.00000 0 302 - 0.00000 - - 5s 0 2 0.00000 0 302 - 0.00000 - - 7s Cutting planes: Clique: 99 Zero half: 5 Explored 17 nodes (36581 simplex iterations) in 7.49 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 -- 10 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:16:51 2012 Optimize a model with 7294 rows, 1326 columns and 22230 nonzeros Presolve time: 0.02s Presolved: 7294 rows, 1326 columns, 22230 nonzeros Variable types: 0 continuous, 1326 integer (1326 binary) Root relaxation: objective 0.000000e+00, 132 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 68 - 0.00000 - - 0s 0 0 0.00000 0 75 - 0.00000 - - 0s 0 0 0.00000 0 178 - 0.00000 - - 1s 0 0 0.00000 0 238 - 0.00000 - - 1s 0 0 0.00000 0 140 - 0.00000 - - 2s 0 0 0.00000 0 169 - 0.00000 - - 3s 0 0 0.00000 0 312 - 0.00000 - - 4s 0 0 0.00000 0 321 - 0.00000 - - 5s 0 0 0.00000 0 321 - 0.00000 - - 5s 0 2 0.00000 0 321 - 0.00000 - - 7s 156 6 infeasible 13 - 0.00000 - 184 10s 464 8 infeasible 13 - 0.00000 - 172 15s Cutting planes: Clique: 171 Zero half: 3 Explored 749 nodes (154700 simplex iterations) in 19.47 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound -, gap - optimal solution found: number of colors: 10