current bounds on the number of colors: 0 -- 185 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 02:55:18 2012 Optimize a model with 82157 rows, 17911 columns and 262936 nonzeros Presolve time: 0.26s Presolved: 82157 rows, 17911 columns, 262936 nonzeros Variable types: 0 continuous, 17911 integer (17911 binary) Root relaxation: objective 0.000000e+00, 631 iterations, 0.06 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 (1047 simplex iterations) in 0.44 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 -- 92 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 02:55:20 2012 Optimize a model with 41171 rows, 9401 columns and 131468 nonzeros Presolve time: 0.16s Presolved: 41171 rows, 9401 columns, 131468 nonzeros Variable types: 0 continuous, 9401 integer (9401 binary) Root relaxation: objective 0.000000e+00, 486 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 (1016 simplex iterations) in 0.26 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 -- 46 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 02:55:20 2012 Optimize a model with 20678 rows, 5146 columns and 65734 nonzeros Presolve time: 0.08s Presolved: 20678 rows, 5146 columns, 65734 nonzeros Variable types: 0 continuous, 5146 integer (5146 binary) Root relaxation: objective 0.000000e+00, 396 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 (744 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 02:55:21 2012 Optimize a model with 9986 rows, 2926 columns and 31438 nonzeros Presolve time: 0.03s Presolved: 9986 rows, 2926 columns, 31438 nonzeros Variable types: 0 continuous, 2926 integer (2926 binary) Root relaxation: objective 0.000000e+00, 405 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 (757 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 02:55:21 2012 Optimize a model with 4640 rows, 1816 columns and 14290 nonzeros Presolve time: 0.01s Presolved: 4640 rows, 1816 columns, 14290 nonzeros Variable types: 0 continuous, 1816 integer (1816 binary) Root relaxation: objective 0.000000e+00, 401 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 0 277 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (5040 simplex iterations) in 0.44 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 02:55:21 2012 Optimize a model with 1967 rows, 1261 columns and 5716 nonzeros Presolve removed 185 rows and 185 columns Presolve time: 0.00s Presolved: 1782 rows, 1076 columns, 5346 nonzeros Variable types: 0 continuous, 1076 integer (1076 binary) Root relaxation: objective 0.000000e+00, 200 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 0 185 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (816 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 02:55:22 2012 Optimize a model with 2858 rows, 1446 columns and 8574 nonzeros Presolve time: 0.01s Presolved: 2858 rows, 1446 columns, 8574 nonzeros Variable types: 0 continuous, 1446 integer (1446 binary) Root relaxation: objective 0.000000e+00, 412 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 0 278 - 0.00000 - - 0s 0 0 0.00000 0 374 - 0.00000 - - 0s 0 0 0.00000 0 518 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 1s Cutting planes: Gomory: 36 Zero half: 830 Explored 0 nodes (9185 simplex iterations) in 1.33 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 02:55:23 2012 Optimize a model with 3749 rows, 1631 columns and 11432 nonzeros Presolve time: 0.01s Presolved: 3749 rows, 1631 columns, 11432 nonzeros Variable types: 0 continuous, 1631 integer (1631 binary) Root relaxation: objective 0.000000e+00, 405 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 0 346 - 0.00000 - - 0s 0 0 0.00000 0 350 - 0.00000 - - 0s 0 0 0.00000 0 356 - 0.00000 - - 0s 0 0 0.00000 0 377 - 0.00000 - - 0s 0 0 0.00000 0 344 - 0.00000 - - 1s 0 0 0.00000 0 328 - 0.00000 - - 1s 0 0 0.00000 0 334 - 0.00000 - - 2s 0 0 0.00000 0 334 - 0.00000 - - 2s 0 0 0.00000 0 336 - 0.00000 - - 2s 0 0 0.00000 0 330 - 0.00000 - - 3s 0 0 0.00000 0 326 - 0.00000 - - 3s 0 0 0.00000 0 326 - 0.00000 - - 4s 0 0 0.00000 0 326 - 0.00000 - - 4s 0 2 0.00000 0 326 - 0.00000 - - 4s 17 15 0.00000 11 351 - 0.00000 - 251 5s 613 91 0.00000 14 338 - 0.00000 - 105 10s 618 94 0.00000 15 326 - 0.00000 - 104 15s 621 96 0.00000 14 316 - 0.00000 - 104 20s 865 73 infeasible 22 - 0.00000 - 195 25s 1165 80 infeasible 23 - 0.00000 - 206 30s 1484 85 infeasible 28 - 0.00000 - 212 35s 1803 92 infeasible 25 - 0.00000 - 214 40s 2115 96 infeasible 24 - 0.00000 - 216 45s 2423 110 0.00000 25 334 - 0.00000 - 218 50s 2707 120 0.00000 28 314 - 0.00000 - 220 55s 2998 105 infeasible 23 - 0.00000 - 223 60s 3336 91 infeasible 25 - 0.00000 - 222 65s 3665 88 infeasible 29 - 0.00000 - 223 70s 3985 80 infeasible 28 - 0.00000 - 223 75s 4294 79 0.00000 27 328 - 0.00000 - 223 80s 4615 58 0.00000 25 356 - 0.00000 - 223 85s 4979 58 infeasible 32 - 0.00000 - 221 90s 5290 37 0.00000 23 340 - 0.00000 - 222 95s 5557 40 0.00000 26 335 - 0.00000 - 223 100s 5846 31 infeasible 28 - 0.00000 - 223 105s 6175 24 0.00000 22 355 - 0.00000 - 223 110s 6437 4 0.00000 21 328 - 0.00000 - 224 115s Cutting planes: Zero half: 9 Explored 6480 nodes (1491752 simplex iterations) in 115.82 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