current bounds on the number of colors: 0 -- 163 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:45:26 2012 Optimize a model with 52651 rows, 13851 columns and 170667 nonzeros Presolve time: 0.17s Presolved: 52651 rows, 13851 columns, 170667 nonzeros Variable types: 0 continuous, 13851 integer (13851 binary) Root relaxation: objective 0.000000e+00, 576 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 (921 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 -- 81 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:45:27 2012 Optimize a model with 26083 rows, 7168 columns and 84280 nonzeros Presolve time: 0.13s Presolved: 26083 rows, 7168 columns, 84280 nonzeros Variable types: 0 continuous, 7168 integer (7168 binary) Root relaxation: objective 0.000000e+00, 497 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 (845 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 -- 40 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:45:28 2012 Optimize a model with 13123 rows, 3908 columns and 42140 nonzeros Presolve time: 0.05s Presolved: 13123 rows, 3908 columns, 42140 nonzeros Variable types: 0 continuous, 3908 integer (3908 binary) Root relaxation: objective 0.000000e+00, 338 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 (628 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 19:45:28 2012 Optimize a model with 6643 rows, 2278 columns and 21070 nonzeros Presolve time: 0.02s Presolved: 6643 rows, 2278 columns, 21070 nonzeros Variable types: 0 continuous, 2278 integer (2278 binary) Root relaxation: objective 0.000000e+00, 352 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 (636 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 19:45:28 2012 Optimize a model with 3403 rows, 1463 columns and 10535 nonzeros Presolve time: 0.01s Presolved: 3403 rows, 1463 columns, 10535 nonzeros Variable types: 0 continuous, 1463 integer (1463 binary) Root relaxation: objective 0.000000e+00, 375 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 (933 simplex iterations) in 0.03 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 19:45:28 2012 Optimize a model with 1459 rows, 974 columns and 4214 nonzeros Presolve removed 163 rows and 163 columns Presolve time: 0.00s Presolved: 1296 rows, 811 columns, 3888 nonzeros Variable types: 0 continuous, 811 integer (811 binary) Root relaxation: objective 0.000000e+00, 166 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 0 163 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (710 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 19:45:28 2012 Optimize a model with 2107 rows, 1137 columns and 6321 nonzeros Presolve time: 0.01s Presolved: 2107 rows, 1137 columns, 6321 nonzeros Variable types: 0 continuous, 1137 integer (1137 binary) Root relaxation: objective 0.000000e+00, 369 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 0 314 - 0.00000 - - 0s 0 0 0.00000 0 318 - 0.00000 - - 0s 0 0 0.00000 0 436 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Cutting planes: Gomory: 19 Zero half: 337 Explored 0 nodes (6270 simplex iterations) in 0.66 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 19:45:29 2012 Optimize a model with 2755 rows, 1300 columns and 8428 nonzeros Presolve time: 0.01s Presolved: 2755 rows, 1300 columns, 8428 nonzeros Variable types: 0 continuous, 1300 integer (1300 binary) Root relaxation: objective 0.000000e+00, 361 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 0 296 - 0.00000 - - 0s 0 0 0.00000 0 298 - 0.00000 - - 0s 0 0 0.00000 0 296 - 0.00000 - - 0s 0 0 0.00000 0 292 - 0.00000 - - 0s 0 0 0.00000 0 397 - 0.00000 - - 0s 0 0 0.00000 0 351 - 0.00000 - - 0s 0 0 0.00000 0 335 - 0.00000 - - 1s 0 0 0.00000 0 277 - 0.00000 - - 1s 0 0 0.00000 0 308 - 0.00000 - - 1s 0 0 0.00000 0 308 - 0.00000 - - 2s * 0 0 0 0.0000000 0.00000 0.0% - 2s Cutting planes: Zero half: 11 Explored 0 nodes (20877 simplex iterations) in 2.11 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% optimal solution found: number of colors: 4