current bounds on the number of colors: 0 -- 164 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:55:17 2012 Optimize a model with 55022 rows, 14117 columns and 178022 nonzeros Presolve time: 0.16s Presolved: 55022 rows, 14117 columns, 178022 nonzeros Variable types: 0 continuous, 14117 integer (14117 binary) Root relaxation: objective 0.000000e+00, 524 iterations, 0.04 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 (864 simplex iterations) in 0.29 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 -- 82 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:55:18 2012 Optimize a model with 27593 rows, 7393 columns and 89011 nonzeros Presolve time: 0.13s Presolved: 27593 rows, 7393 columns, 89011 nonzeros Variable types: 0 continuous, 7393 integer (7393 binary) Root relaxation: objective 0.000000e+00, 443 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 (759 simplex iterations) in 0.19 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 -- 41 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:55:19 2012 Optimize a model with 13544 rows, 3949 columns and 43420 nonzeros Presolve time: 0.05s Presolved: 13544 rows, 3949 columns, 43420 nonzeros Variable types: 0 continuous, 3949 integer (3949 binary) Root relaxation: objective 0.000000e+00, 337 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 (629 simplex iterations) in 0.08 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 -- 20 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:55:19 2012 Optimize a model with 6854 rows, 2309 columns and 21710 nonzeros Presolve time: 0.02s Presolved: 6854 rows, 2309 columns, 21710 nonzeros Variable types: 0 continuous, 2309 integer (2309 binary) Root relaxation: objective 0.000000e+00, 344 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 (612 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 -- 10 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:55:19 2012 Optimize a model with 3509 rows, 1489 columns and 10855 nonzeros Presolve time: 0.01s Presolved: 3509 rows, 1489 columns, 10855 nonzeros Variable types: 0 continuous, 1489 integer (1489 binary) Root relaxation: objective 0.000000e+00, 367 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 (2927 simplex iterations) in 0.14 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 Fri Dec 14 19:55:19 2012 Optimize a model with 1502 rows, 997 columns and 4342 nonzeros Presolve removed 164 rows and 164 columns Presolve time: 0.00s Presolved: 1338 rows, 833 columns, 4014 nonzeros Variable types: 0 continuous, 833 integer (833 binary) Root relaxation: objective 0.000000e+00, 173 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 0 164 - 0.00000 - - 0s Explored 0 nodes (711 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 Fri Dec 14 19:55:19 2012 Optimize a model with 2171 rows, 1161 columns and 6513 nonzeros Presolve time: 0.01s Presolved: 2171 rows, 1161 columns, 6513 nonzeros Variable types: 0 continuous, 1161 integer (1161 binary) Root relaxation: objective 0.000000e+00, 390 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 0 310 - 0.00000 - - 0s 0 0 0.00000 0 316 - 0.00000 - - 0s 0 0 0.00000 0 446 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Cutting planes: Gomory: 35 Zero half: 359 Explored 0 nodes (6134 simplex iterations) in 0.75 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 Fri Dec 14 19:55:20 2012 Optimize a model with 2840 rows, 1325 columns and 8684 nonzeros Presolve time: 0.01s Presolved: 2840 rows, 1325 columns, 8684 nonzeros Variable types: 0 continuous, 1325 integer (1325 binary) Root relaxation: objective 0.000000e+00, 373 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 0 312 - 0.00000 - - 0s 0 0 0.00000 0 294 - 0.00000 - - 0s 0 0 0.00000 0 306 - 0.00000 - - 0s 0 0 0.00000 0 386 - 0.00000 - - 0s 0 0 0.00000 0 282 - 0.00000 - - 0s 0 0 0.00000 0 363 - 0.00000 - - 1s 0 0 0.00000 0 339 - 0.00000 - - 1s 0 0 0.00000 0 410 - 0.00000 - - 2s 0 0 0.00000 0 384 - 0.00000 - - 2s 0 2 0.00000 0 373 - 0.00000 - - 2s 603 92 0.00000 28 306 - 0.00000 - 82.1 5s 612 98 0.00000 13 239 - 0.00000 - 80.9 10s 775 117 infeasible 39 - 0.00000 - 146 15s * 783 42 36 0.0000000 0.00000 0.0% 146 15s Cutting planes: Gomory: 1 Zero half: 4 Explored 784 nodes (136422 simplex iterations) in 15.07 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% optimal solution found: number of colors: 4