current bounds on the number of colors: 0 -- 123 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 21:49:06 2012 Optimize a model with 45751 rows, 8251 columns and 144387 nonzeros Presolve time: 0.15s Presolved: 45751 rows, 8251 columns, 144387 nonzeros Variable types: 0 continuous, 8251 integer (8251 binary) Root relaxation: objective 0.000000e+00, 314 iterations, 0.05 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 (593 simplex iterations) in 0.27 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 -- 61 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 21:49:07 2012 Optimize a model with 22563 rows, 4438 columns and 71010 nonzeros Presolve time: 0.10s Presolved: 22563 rows, 4438 columns, 71010 nonzeros Variable types: 0 continuous, 4438 integer (4438 binary) Root relaxation: objective 0.000000e+00, 300 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 (739 simplex iterations) in 0.17 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 -- 30 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 21:49:08 2012 Optimize a model with 11343 rows, 2593 columns and 35505 nonzeros Presolve time: 0.04s Presolved: 11343 rows, 2593 columns, 35505 nonzeros Variable types: 0 continuous, 2593 integer (2593 binary) Root relaxation: objective 0.000000e+00, 250 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 (507 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 -- 15 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 21:49:08 2012 Optimize a model with 5359 rows, 1609 columns and 16569 nonzeros Presolve time: 0.01s Presolved: 5359 rows, 1609 columns, 16569 nonzeros Variable types: 0 continuous, 1609 integer (1609 binary) Root relaxation: objective 0.000000e+00, 265 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 (1138 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 -- 7 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 21:49:08 2012 Optimize a model with 2367 rows, 1117 columns and 7101 nonzeros Presolve time: 0.01s Presolved: 2367 rows, 1117 columns, 7101 nonzeros Variable types: 0 continuous, 1117 integer (1117 binary) Root relaxation: objective 0.000000e+00, 280 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 0 188 - 0.00000 - - 0s 0 0 0.00000 0 249 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (5003 simplex iterations) in 0.49 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: 3 -- 7 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 21:49:09 2012 Optimize a model with 3863 rows, 1363 columns and 11835 nonzeros Presolve time: 0.01s Presolved: 3863 rows, 1363 columns, 11835 nonzeros Variable types: 0 continuous, 1363 integer (1363 binary) Root relaxation: objective 0.000000e+00, 260 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 0 230 - 0.00000 - - 0s 0 0 0.00000 0 224 - 0.00000 - - 0s 0 0 0.00000 0 267 - 0.00000 - - 0s 0 0 0.00000 0 314 - 0.00000 - - 0s 0 0 0.00000 0 282 - 0.00000 - - 1s 0 0 0.00000 0 304 - 0.00000 - - 2s 0 0 0.00000 0 304 - 0.00000 - - 2s 0 2 0.00000 0 304 - 0.00000 - - 2s 539 38 infeasible 31 - 0.00000 - 73.7 5s 808 43 0.00000 22 274 - 0.00000 - 69.4 10s 816 48 0.00000 15 213 - 0.00000 - 68.7 15s 1040 109 0.00000 33 228 - 0.00000 - 121 20s 1551 222 infeasible 39 - 0.00000 - 135 25s 2013 266 0.00000 32 238 - 0.00000 - 145 30s 2519 342 0.00000 29 237 - 0.00000 - 149 35s 3042 387 infeasible 40 - 0.00000 - 151 40s 3499 470 infeasible 36 - 0.00000 - 153 45s 3909 486 infeasible 36 - 0.00000 - 157 50s 4389 532 0.00000 35 227 - 0.00000 - 159 55s 4842 589 infeasible 34 - 0.00000 - 161 60s * 5030 2 35 0.0000000 0.00000 0.0% 162 62s Cutting planes: Gomory: 4 Clique: 2 Zero half: 7 Explored 5031 nodes (835648 simplex iterations) in 62.33 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: 3 -- 5 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 21:50:11 2012 Optimize a model with 3115 rows, 1240 columns and 9468 nonzeros Presolve time: 0.01s Presolved: 3115 rows, 1240 columns, 9468 nonzeros Variable types: 0 continuous, 1240 integer (1240 binary) Root relaxation: objective 0.000000e+00, 276 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 0 172 - 0.00000 - - 0s 0 0 0.00000 0 216 - 0.00000 - - 0s 0 0 0.00000 0 359 - 0.00000 - - 1s 0 0 0.00000 0 354 - 0.00000 - - 1s 0 0 0.00000 0 343 - 0.00000 - - 1s 0 0 0.00000 0 340 - 0.00000 - - 1s 0 0 0.00000 0 352 - 0.00000 - - 1s 0 0 0.00000 0 347 - 0.00000 - - 2s 0 0 0.00000 0 348 - 0.00000 - - 3s 0 0 0.00000 0 343 - 0.00000 - - 3s 0 0 0.00000 0 342 - 0.00000 - - 4s 0 0 0.00000 0 341 - 0.00000 - - 4s 0 0 0.00000 0 354 - 0.00000 - - 5s 0 0 0.00000 0 354 - 0.00000 - - 5s 0 2 0.00000 0 354 - 0.00000 - - 6s 165 7 0.00000 7 305 - 0.00000 - 229 10s Cutting planes: Clique: 24 Zero half: 35 Explored 216 nodes (75077 simplex iterations) in 10.96 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound -, gap - optimal solution found: number of colors: 5