current bounds on the number of colors: 0 -- 189 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 04:44:53 2012 Optimize a model with 82721 rows, 18644 columns and 265362 nonzeros Presolve time: 0.26s Presolved: 82721 rows, 18644 columns, 265362 nonzeros Variable types: 0 continuous, 18644 integer (18644 binary) Root relaxation: objective 0.000000e+00, 742 iterations, 0.08 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 (1175 simplex iterations) in 0.46 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 -- 94 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 04:44:54 2012 Optimize a model with 41455 rows, 9761 columns and 132681 nonzeros Presolve time: 0.15s Presolved: 41455 rows, 9761 columns, 132681 nonzeros Variable types: 0 continuous, 9761 integer (9761 binary) Root relaxation: objective 0.000000e+00, 690 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 (1121 simplex iterations) in 0.25 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 -- 47 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 04:44:55 2012 Optimize a model with 20383 rows, 5225 columns and 64929 nonzeros Presolve time: 0.08s Presolved: 20383 rows, 5225 columns, 64929 nonzeros Variable types: 0 continuous, 5225 integer (5225 binary) Root relaxation: objective 0.000000e+00, 418 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 (783 simplex iterations) in 0.12 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 Sat Dec 15 04:44:55 2012 Optimize a model with 9847 rows, 2957 columns and 31053 nonzeros Presolve time: 0.03s Presolved: 9847 rows, 2957 columns, 31053 nonzeros Variable types: 0 continuous, 2957 integer (2957 binary) Root relaxation: objective 0.000000e+00, 402 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 (755 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 -- 11 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 04:44:56 2012 Optimize a model with 4579 rows, 1823 columns and 14115 nonzeros Presolve time: 0.01s Presolved: 4579 rows, 1823 columns, 14115 nonzeros Variable types: 0 continuous, 1823 integer (1823 binary) Root relaxation: objective 0.000000e+00, 414 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 H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (3822 simplex iterations) in 0.23 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 -- 5 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 04:44:56 2012 Optimize a model with 1945 rows, 1256 columns and 5646 nonzeros Presolve removed 189 rows and 189 columns Presolve time: 0.00s Presolved: 1756 rows, 1067 columns, 5268 nonzeros Variable types: 0 continuous, 1067 integer (1067 binary) Root relaxation: objective 0.000000e+00, 198 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 0 189 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (804 simplex iterations) in 0.02 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: 2 -- 5 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 04:44:56 2012 Optimize a model with 2823 rows, 1445 columns and 8469 nonzeros Presolve time: 0.01s Presolved: 2823 rows, 1445 columns, 8469 nonzeros Variable types: 0 continuous, 1445 integer (1445 binary) Root relaxation: objective 0.000000e+00, 423 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 0 300 - 0.00000 - - 0s 0 0 0.00000 0 364 - 0.00000 - - 0s 0 0 0.00000 0 514 - 0.00000 - - 0s 0 0 0.00000 0 524 - 0.00000 - - 1s 0 0 infeasible 0 - 0.10000 - - 1s Cutting planes: Gomory: 1 Zero half: 537 Explored 0 nodes (9154 simplex iterations) in 1.32 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 -- 5 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 04:44:57 2012 Optimize a model with 3701 rows, 1634 columns and 11292 nonzeros Presolve time: 0.01s Presolved: 3701 rows, 1634 columns, 11292 nonzeros Variable types: 0 continuous, 1634 integer (1634 binary) Root relaxation: objective 0.000000e+00, 432 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 0 356 - 0.00000 - - 0s 0 0 0.00000 0 356 - 0.00000 - - 0s 0 0 0.00000 0 354 - 0.00000 - - 0s 0 0 0.00000 0 512 - 0.00000 - - 0s 0 0 0.00000 0 334 - 0.00000 - - 1s 0 0 0.00000 0 326 - 0.00000 - - 1s 0 0 0.00000 0 320 - 0.00000 - - 2s 0 0 0.00000 0 318 - 0.00000 - - 2s 0 0 0.00000 0 318 - 0.00000 - - 2s 0 0 0.00000 0 316 - 0.00000 - - 3s 0 0 0.00000 0 308 - 0.00000 - - 3s 0 0 0.00000 0 304 - 0.00000 - - 4s 0 0 0.00000 0 311 - 0.00000 - - 4s 0 0 0.00000 0 304 - 0.00000 - - 4s 0 0 0.00000 0 288 - 0.00000 - - 5s 0 0 0.00000 0 292 - 0.00000 - - 5s 0 0 0.00000 0 288 - 0.00000 - - 5s 0 0 0.00000 0 290 - 0.00000 - - 6s 0 0 0.00000 0 290 - 0.00000 - - 6s 0 2 0.00000 0 290 - 0.00000 - - 6s 594 116 0.00000 20 308 - 0.00000 - 110 10s 608 121 0.00000 13 282 - 0.00000 - 108 16s 612 123 0.00000 15 274 - 0.00000 - 108 20s 844 92 infeasible 22 - 0.00000 - 188 25s 1193 97 infeasible 24 - 0.00000 - 195 30s 1533 95 infeasible 26 - 0.00000 - 205 35s 1894 92 0.00000 21 345 - 0.00000 - 208 40s 2225 79 0.00000 25 334 - 0.00000 - 213 45s 2550 76 infeasible 24 - 0.00000 - 217 50s 2908 92 0.00000 25 332 - 0.00000 - 217 55s 3242 54 infeasible 29 - 0.00000 - 220 60s 3570 44 0.00000 25 348 - 0.00000 - 223 65s 3927 29 infeasible 24 - 0.00000 - 223 70s 4305 31 infeasible 26 - 0.00000 - 222 75s 4636 47 infeasible 25 - 0.00000 - 223 80s 4966 29 0.00000 23 342 - 0.00000 - 223 85s 5340 31 infeasible 29 - 0.00000 - 222 90s 5698 31 infeasible 24 - 0.00000 - 222 95s 5997 22 infeasible 24 - 0.00000 - 223 100s 6322 19 infeasible 29 - 0.00000 - 223 105s 6678 29 0.00000 27 343 - 0.00000 - 223 110s 6980 5 infeasible 27 - 0.00000 - 224 115s Cutting planes: Gomory: 1 Zero half: 16 Explored 6988 nodes (1622039 simplex iterations) in 115.17 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