current bounds on the number of colors: 0 -- 147 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:44:45 2012 Optimize a model with 38180 rows, 11252 columns and 124830 nonzeros Presolve time: 0.15s Presolved: 38180 rows, 11252 columns, 124830 nonzeros Variable types: 0 continuous, 11252 integer (11252 binary) Root relaxation: objective 0.000000e+00, 484 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 (782 simplex iterations) in 0.23 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 -- 73 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:44:45 2012 Optimize a model with 18903 rows, 5813 columns and 61560 nonzeros Presolve time: 0.10s Presolved: 18903 rows, 5813 columns, 61560 nonzeros Variable types: 0 continuous, 5813 integer (5813 binary) Root relaxation: objective 0.000000e+00, 405 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 (689 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 -- 36 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:44:46 2012 Optimize a model with 9525 rows, 3167 columns and 30780 nonzeros Presolve time: 0.04s Presolved: 9525 rows, 3167 columns, 30780 nonzeros Variable types: 0 continuous, 3167 integer (3167 binary) Root relaxation: objective 0.000000e+00, 295 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 (546 simplex iterations) in 0.05 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 18:44:46 2012 Optimize a model with 4836 rows, 1844 columns and 15390 nonzeros Presolve time: 0.01s Presolved: 4836 rows, 1844 columns, 15390 nonzeros Variable types: 0 continuous, 1844 integer (1844 binary) Root relaxation: objective 0.000000e+00, 319 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 (576 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 18:44:46 2012 Optimize a model with 2231 rows, 1109 columns and 6840 nonzeros Presolve time: 0.01s Presolved: 2231 rows, 1109 columns, 6840 nonzeros Variable types: 0 continuous, 1109 integer (1109 binary) Root relaxation: objective 0.000000e+00, 325 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 0 196 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (2585 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 -- 4 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:44:46 2012 Optimize a model with 1189 rows, 815 columns and 3420 nonzeros Presolve removed 147 rows and 147 columns Presolve time: 0.00s Presolved: 1042 rows, 668 columns, 3126 nonzeros Variable types: 0 continuous, 668 integer (668 binary) Root relaxation: objective 0.000000e+00, 153 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 0 147 - 0.00000 - - 0s Explored 0 nodes (630 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 18:44:46 2012 Optimize a model with 1710 rows, 962 columns and 5130 nonzeros Presolve time: 0.00s Presolved: 1710 rows, 962 columns, 5130 nonzeros Variable types: 0 continuous, 962 integer (962 binary) Root relaxation: objective 0.000000e+00, 328 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 0 292 - 0.00000 - - 0s 0 0 0.00000 0 282 - 0.00000 - - 0s 0 0 0.00000 0 290 - 0.00000 - - 0s 0 0 0.00000 0 381 - 0.00000 - - 0s 0 0 0.00000 0 377 - 0.00000 - - 0s 0 0 0.00000 0 272 - 0.00000 - - 0s 0 0 0.00000 0 378 - 0.00000 - - 1s 0 0 0.00000 0 373 - 0.00000 - - 1s 0 0 0.00000 0 367 - 0.00000 - - 1s 0 0 0.00000 0 367 - 0.00000 - - 1s 0 0 0.00000 0 362 - 0.00000 - - 2s 0 0 0.00000 0 376 - 0.00000 - - 2s 0 0 0.00000 0 376 - 0.00000 - - 2s 0 2 0.00000 0 376 - 0.00000 - - 2s Cutting planes: Clique: 3 Zero half: 23 Explored 7 nodes (23784 simplex iterations) in 2.83 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound -, gap - optimal solution found: number of colors: 4