current bounds on the number of colors: 0 -- 156 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:00:05 2012 Optimize a model with 47970 rows, 12781 columns and 155610 nonzeros Presolve time: 0.16s Presolved: 47970 rows, 12781 columns, 155610 nonzeros Variable types: 0 continuous, 12781 integer (12781 binary) Root relaxation: objective 0.000000e+00, 562 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 (895 simplex iterations) in 0.27 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 -- 78 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:00:06 2012 Optimize a model with 24063 rows, 6697 columns and 77805 nonzeros Presolve time: 0.13s Presolved: 24063 rows, 6697 columns, 77805 nonzeros Variable types: 0 continuous, 6697 integer (6697 binary) Root relaxation: objective 0.000000e+00, 506 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 (841 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 -- 39 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:00:06 2012 Optimize a model with 11803 rows, 3577 columns and 37905 nonzeros Presolve time: 0.04s Presolved: 11803 rows, 3577 columns, 37905 nonzeros Variable types: 0 continuous, 3577 integer (3577 binary) Root relaxation: objective 0.000000e+00, 314 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 (580 simplex iterations) in 0.07 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% current bounds on the number of colors: 0 -- 19 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:00:06 2012 Optimize a model with 5673 rows, 2017 columns and 17955 nonzeros Presolve time: 0.02s Presolved: 5673 rows, 2017 columns, 17955 nonzeros Variable types: 0 continuous, 2017 integer (2017 binary) Root relaxation: objective 0.000000e+00, 327 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 (592 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 19:00:06 2012 Optimize a model with 2608 rows, 1237 columns and 7980 nonzeros Presolve time: 0.01s Presolved: 2608 rows, 1237 columns, 7980 nonzeros Variable types: 0 continuous, 1237 integer (1237 binary) Root relaxation: objective 0.000000e+00, 357 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 0 290 - 0.00000 - - 0s 0 0 0.00000 0 292 - 0.00000 - - 0s 0 0 0.00000 0 284 - 0.00000 - - 0s 0 0 0.00000 0 316 - 0.00000 - - 0s 0 0 0.00000 0 262 - 0.00000 - - 0s 0 0 0.00000 0 254 - 0.00000 - - 0s 0 0 0.00000 0 250 - 0.00000 - - 0s 0 0 0.00000 0 242 - 0.00000 - - 0s 0 0 0.00000 0 175 - 0.00000 - - 1s 0 0 0.00000 0 266 - 0.00000 - - 1s 0 0 0.00000 0 279 - 0.00000 - - 1s 0 0 0.00000 0 273 - 0.00000 - - 1s 0 0 0.00000 0 262 - 0.00000 - - 2s 0 0 0.00000 0 312 - 0.00000 - - 2s 0 0 0.00000 0 311 - 0.00000 - - 2s 0 2 0.00000 0 266 - 0.00000 - - 2s * 126 3 21 0.0000000 0.00000 0.0% 89.7 3s Cutting planes: Zero half: 15 Explored 127 nodes (40415 simplex iterations) in 3.28 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 19:00:10 2012 Optimize a model with 1382 rows, 925 columns and 3990 nonzeros Presolve removed 156 rows and 156 columns Presolve time: 0.00s Presolved: 1226 rows, 769 columns, 3678 nonzeros Variable types: 0 continuous, 769 integer (769 binary) Root relaxation: objective 0.000000e+00, 165 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 0 156 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (680 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 -- 4 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:00:10 2012 Optimize a model with 1995 rows, 1081 columns and 5985 nonzeros Presolve time: 0.01s Presolved: 1995 rows, 1081 columns, 5985 nonzeros Variable types: 0 continuous, 1081 integer (1081 binary) Root relaxation: objective 0.000000e+00, 367 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 0 304 - 0.00000 - - 0s 0 0 0.00000 0 298 - 0.00000 - - 0s 0 0 0.00000 0 372 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Cutting planes: Gomory: 2 Clique: 1 Zero half: 469 Explored 0 nodes (6380 simplex iterations) in 0.55 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