current bounds on the number of colors: 0 -- 150 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:47:40 2012 Optimize a model with 42975 rows, 11821 columns and 139725 nonzeros Presolve time: 0.15s Presolved: 42975 rows, 11821 columns, 139725 nonzeros Variable types: 0 continuous, 11821 integer (11821 binary) Root relaxation: objective 0.000000e+00, 506 iterations, 0.03 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 (811 simplex iterations) in 0.24 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 -- 75 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:47:41 2012 Optimize a model with 21277 rows, 6121 columns and 68931 nonzeros Presolve time: 0.11s Presolved: 21277 rows, 6121 columns, 68931 nonzeros Variable types: 0 continuous, 6121 integer (6121 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 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (716 simplex iterations) in 0.15 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 -- 37 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:47:41 2012 Optimize a model with 10428 rows, 3271 columns and 33534 nonzeros Presolve time: 0.04s Presolved: 10428 rows, 3271 columns, 33534 nonzeros Variable types: 0 continuous, 3271 integer (3271 binary) Root relaxation: objective 0.000000e+00, 305 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 (547 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 -- 18 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:47:42 2012 Optimize a model with 5289 rows, 1921 columns and 16767 nonzeros Presolve time: 0.02s Presolved: 5289 rows, 1921 columns, 16767 nonzeros Variable types: 0 continuous, 1921 integer (1921 binary) Root relaxation: objective 0.000000e+00, 314 iterations, 0.00 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 (578 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 -- 9 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:47:42 2012 Optimize a model with 2434 rows, 1171 columns and 7452 nonzeros Presolve time: 0.01s Presolved: 2434 rows, 1171 columns, 7452 nonzeros Variable types: 0 continuous, 1171 integer (1171 binary) Root relaxation: objective 0.000000e+00, 338 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 0 284 - 0.00000 - - 0s 0 0 0.00000 0 264 - 0.00000 - - 0s 0 0 0.00000 0 282 - 0.00000 - - 0s 0 0 0.00000 0 284 - 0.00000 - - 0s 0 0 0.00000 0 274 - 0.00000 - - 0s 0 0 0.00000 0 266 - 0.00000 - - 0s 0 0 0.00000 0 252 - 0.00000 - - 0s 0 0 0.00000 0 242 - 0.00000 - - 0s 0 0 0.00000 0 236 - 0.00000 - - 1s 0 0 0.00000 0 224 - 0.00000 - - 1s 0 0 0.00000 0 224 - 0.00000 - - 1s 0 0 0.00000 0 223 - 0.00000 - - 1s 0 0 0.00000 0 218 - 0.00000 - - 1s 0 0 0.00000 0 196 - 0.00000 - - 1s 0 0 0.00000 0 204 - 0.00000 - - 1s 0 0 0.00000 0 160 - 0.00000 - - 2s 0 0 0.00000 0 168 - 0.00000 - - 2s 0 0 0.00000 0 168 - 0.00000 - - 2s 0 2 0.00000 0 168 - 0.00000 - - 2s * 59 0 22 0.0000000 0.00000 0.0% 85.7 2s Cutting planes: Zero half: 9 Explored 60 nodes (37463 simplex iterations) in 2.67 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 -- 4 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:47:44 2012 Optimize a model with 1292 rows, 871 columns and 3726 nonzeros Presolve removed 150 rows and 150 columns Presolve time: 0.00s Presolved: 1142 rows, 721 columns, 3426 nonzeros Variable types: 0 continuous, 721 integer (721 binary) Root relaxation: objective 0.000000e+00, 164 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 0 150 - 0.00000 - - 0s Explored 0 nodes (648 simplex iterations) in 0.01 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 -- 4 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:47:45 2012 Optimize a model with 1863 rows, 1021 columns and 5589 nonzeros Presolve time: 0.00s Presolved: 1863 rows, 1021 columns, 5589 nonzeros Variable types: 0 continuous, 1021 integer (1021 binary) Root relaxation: objective 0.000000e+00, 341 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 0 298 - 0.00000 - - 0s 0 0 0.00000 0 296 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (3387 simplex iterations) in 0.28 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound 1.000000000000e+00, gap - optimal solution found: number of colors: 4