current bounds on the number of colors: 0 -- 28 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:35:40 2012 Optimize a model with 616 rows, 434 columns and 2156 nonzeros Presolve removed 1 rows and 14 columns Presolve time: 0.00s Presolved: 615 rows, 420 columns, 2142 nonzeros Variable types: 0 continuous, 420 integer (420 binary) Root relaxation: objective 0.000000e+00, 55 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 (82 simplex iterations) in 0.00 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 Thu Dec 13 19:35:41 2012 Optimize a model with 322 rows, 238 columns and 1078 nonzeros Presolve removed 1 rows and 7 columns Presolve time: 0.00s Presolved: 321 rows, 231 columns, 1071 nonzeros Variable types: 0 continuous, 231 integer (231 binary) Root relaxation: objective 0.000000e+00, 58 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 (58 simplex iterations) in 0.00 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 Thu Dec 13 19:35:41 2012 Optimize a model with 154 rows, 126 columns and 462 nonzeros Presolve removed 1 rows and 3 columns Presolve time: 0.00s Presolved: 153 rows, 123 columns, 459 nonzeros Variable types: 0 continuous, 123 integer (123 binary) Root relaxation: objective 0.000000e+00, 55 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 (97 simplex iterations) in 0.00 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 Thu Dec 13 19:35:41 2012 Optimize a model with 70 rows, 70 columns and 154 nonzeros Presolve removed 70 rows and 70 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 Thu Dec 13 19:35:41 2012 Optimize a model with 112 rows, 98 columns and 308 nonzeros Presolve removed 30 rows and 32 columns Presolve time: 0.00s Presolved: 82 rows, 66 columns, 246 nonzeros Variable types: 0 continuous, 66 integer (66 binary) Root relaxation: objective 0.000000e+00, 27 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 25 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (85 simplex iterations) in 0.00 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