current bounds on the number of colors: 0 -- 162 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:36:38 2012 Optimize a model with 52812 rows, 13772 columns and 171072 nonzeros Presolve time: 0.17s Presolved: 52812 rows, 13772 columns, 171072 nonzeros Variable types: 0 continuous, 13772 integer (13772 binary) Root relaxation: objective 0.000000e+00, 586 iterations, 0.05 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 (910 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 19:36:39 2012 Optimize a model with 26162 rows, 7130 columns and 84480 nonzeros Presolve time: 0.13s Presolved: 26162 rows, 7130 columns, 84480 nonzeros Variable types: 0 continuous, 7130 integer (7130 binary) Root relaxation: objective 0.000000e+00, 408 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 (693 simplex iterations) in 0.18 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 19:36:39 2012 Optimize a model with 13162 rows, 3890 columns and 42240 nonzeros Presolve time: 0.05s Presolved: 13162 rows, 3890 columns, 42240 nonzeros Variable types: 0 continuous, 3890 integer (3890 binary) Root relaxation: objective 0.000000e+00, 329 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 (611 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 19:36:40 2012 Optimize a model with 6662 rows, 2270 columns and 21120 nonzeros Presolve time: 0.02s Presolved: 6662 rows, 2270 columns, 21120 nonzeros Variable types: 0 continuous, 2270 integer (2270 binary) Root relaxation: objective 0.000000e+00, 368 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 (660 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 19:36:40 2012 Optimize a model with 3412 rows, 1460 columns and 10560 nonzeros Presolve time: 0.01s Presolved: 3412 rows, 1460 columns, 10560 nonzeros Variable types: 0 continuous, 1460 integer (1460 binary) Root relaxation: objective 0.000000e+00, 354 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 (1040 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 19:36:40 2012 Optimize a model with 1462 rows, 974 columns and 4224 nonzeros Presolve removed 162 rows and 162 columns Presolve time: 0.00s Presolved: 1300 rows, 812 columns, 3900 nonzeros Variable types: 0 continuous, 812 integer (812 binary) Root relaxation: objective 0.000000e+00, 167 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 0 162 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (703 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 19:36:40 2012 Optimize a model with 2112 rows, 1136 columns and 6336 nonzeros Presolve time: 0.01s Presolved: 2112 rows, 1136 columns, 6336 nonzeros Variable types: 0 continuous, 1136 integer (1136 binary) Root relaxation: objective 0.000000e+00, 359 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 0 318 - 0.00000 - - 0s 0 0 0.00000 0 320 - 0.00000 - - 0s 0 0 0.00000 0 380 - 0.00000 - - 0s 0 0 0.00000 0 447 - 0.00000 - - 0s 0 0 0.00000 0 426 - 0.00000 - - 1s 0 0 0.00000 0 428 - 0.00000 - - 1s 0 0 0.00000 0 423 - 0.00000 - - 1s 0 0 0.00000 0 433 - 0.00000 - - 2s 0 0 0.00000 0 433 - 0.00000 - - 2s 0 2 0.00000 0 374 - 0.00000 - - 2s Cutting planes: Zero half: 62 Explored 3 nodes (20926 simplex iterations) in 2.83 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound -, gap - current bounds on the number of colors: 3 -- 5 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:36:43 2012 Optimize a model with 2762 rows, 1298 columns and 8448 nonzeros Presolve time: 0.01s Presolved: 2762 rows, 1298 columns, 8448 nonzeros Variable types: 0 continuous, 1298 integer (1298 binary) Root relaxation: objective 0.000000e+00, 368 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 0 310 - 0.00000 - - 0s 0 0 0.00000 0 306 - 0.00000 - - 0s 0 0 0.00000 0 335 - 0.00000 - - 0s 0 0 0.00000 0 300 - 0.00000 - - 0s 0 0 0.00000 0 292 - 0.00000 - - 0s 0 0 0.00000 0 278 - 0.00000 - - 1s 0 0 0.00000 0 274 - 0.00000 - - 1s 0 0 0.00000 0 250 - 0.00000 - - 1s 0 0 0.00000 0 248 - 0.00000 - - 1s 0 0 0.00000 0 250 - 0.00000 - - 1s 0 0 0.00000 0 236 - 0.00000 - - 1s 0 0 0.00000 0 242 - 0.00000 - - 2s 0 0 0.00000 0 236 - 0.00000 - - 2s 0 0 0.00000 0 224 - 0.00000 - - 2s 0 0 0.00000 0 205 - 0.00000 - - 2s 0 0 0.00000 0 188 - 0.00000 - - 2s 0 0 0.00000 0 166 - 0.00000 - - 2s 0 0 0.00000 0 160 - 0.00000 - - 3s 0 0 0.00000 0 158 - 0.00000 - - 3s 0 0 0.00000 0 181 - 0.00000 - - 3s 0 0 0.00000 0 252 - 0.00000 - - 3s 0 0 0.00000 0 252 - 0.00000 - - 3s 0 2 0.00000 0 252 - 0.00000 - - 3s 699 87 0.00000 25 138 - 0.00000 - 41.4 5s * 846 2 24 0.0000000 0.00000 0.0% 39.8 5s Cutting planes: Zero half: 23 Explored 847 nodes (79533 simplex iterations) in 5.19 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% optimal solution found: number of colors: 4