current bounds on the number of colors: 0 -- 231 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:40:18 2012 Optimize a model with 31166 rows, 26834 columns and 119370 nonzeros Presolve removed 21 rows and 2415 columns Presolve time: 0.15s Presolved: 31145 rows, 24419 columns, 116955 nonzeros Variable types: 0 continuous, 24419 integer (24419 binary) Root relaxation: objective 0.000000e+00, 389 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 (389 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 -- 115 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:40:19 2012 Optimize a model with 15564 rows, 13436 columns and 59166 nonzeros Presolve removed 21 rows and 1197 columns Presolve time: 0.12s Presolved: 15543 rows, 12239 columns, 57969 nonzeros Variable types: 0 continuous, 12239 integer (12239 binary) Root relaxation: objective 0.000000e+00, 389 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 (389 simplex iterations) in 0.13 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 -- 57 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:40:19 2012 Optimize a model with 7763 rows, 6737 columns and 29064 nonzeros Presolve removed 21 rows and 588 columns Presolve time: 0.05s Presolved: 7742 rows, 6149 columns, 28476 nonzeros Variable types: 0 continuous, 6149 integer (6149 binary) Root relaxation: objective 0.000000e+00, 393 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 (393 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 -- 28 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:40:19 2012 Optimize a model with 3997 rows, 3503 columns and 14532 nonzeros Presolve removed 21 rows and 294 columns Presolve time: 0.02s Presolved: 3976 rows, 3209 columns, 14238 nonzeros Variable types: 0 continuous, 3209 integer (3209 binary) Root relaxation: objective 0.000000e+00, 422 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 (650 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 -- 14 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:40:19 2012 Optimize a model with 2114 rows, 1886 columns and 7266 nonzeros Presolve removed 21 rows and 147 columns Presolve time: 0.01s Presolved: 2093 rows, 1739 columns, 7119 nonzeros Variable types: 0 continuous, 1739 integer (1739 binary) Root relaxation: objective 0.000000e+00, 394 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 (394 simplex iterations) in 0.01 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 -- 7 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:40:19 2012 Optimize a model with 1038 rows, 962 columns and 3114 nonzeros Presolve removed 21 rows and 63 columns Presolve time: 0.00s Presolved: 1017 rows, 899 columns, 3051 nonzeros Variable types: 0 continuous, 899 integer (899 binary) Root relaxation: objective 0.000000e+00, 395 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 (671 simplex iterations) in 0.01 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 -- 3 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:40:20 2012 Optimize a model with 500 rows, 500 columns and 1038 nonzeros Presolve removed 500 rows and 500 columns Presolve time: 0.00s Explored 0 nodes (0 simplex iterations) in 0.00 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: 1 -- 3 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:40:20 2012 Optimize a model with 769 rows, 731 columns and 2076 nonzeros Presolve removed 237 rows and 261 columns Presolve time: 0.00s Presolved: 532 rows, 470 columns, 1596 nonzeros Variable types: 0 continuous, 470 integer (470 binary) Root relaxation: objective 0.000000e+00, 225 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 0 204 - 0.00000 - - 0s Explored 0 nodes (716 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 - optimal solution found: number of colors: 3