current bounds on the number of colors: 0 -- 32 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:29 2012 Optimize a model with 304 rows, 529 columns and 1328 nonzeros Presolve removed 10 rows and 160 columns Presolve time: 0.00s Presolved: 294 rows, 369 columns, 1168 nonzeros Variable types: 0 continuous, 369 integer (369 binary) Root relaxation: objective 0.000000e+00, 36 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 (36 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 -- 16 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:29 2012 Optimize a model with 168 rows, 273 columns and 664 nonzeros Presolve removed 10 rows and 80 columns Presolve time: 0.00s Presolved: 158 rows, 193 columns, 584 nonzeros Variable types: 0 continuous, 193 integer (193 binary) Root relaxation: objective 0.000000e+00, 37 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 (37 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 -- 8 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:29 2012 Optimize a model with 100 rows, 145 columns and 332 nonzeros Presolve removed 10 rows and 40 columns Presolve time: 0.00s Presolved: 90 rows, 105 columns, 292 nonzeros Variable types: 0 continuous, 105 integer (105 binary) Root relaxation: objective 0.000000e+00, 32 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 (32 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 -- 4 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:29 2012 Optimize a model with 66 rows, 81 columns and 166 nonzeros Presolve removed 38 rows and 51 columns Presolve time: 0.00s Presolved: 28 rows, 30 columns, 84 nonzeros Variable types: 0 continuous, 30 integer (30 binary) Root relaxation: objective 0.000000e+00, 11 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 (11 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 -- 2 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:29 2012 Optimize a model with 49 rows, 49 columns and 83 nonzeros Presolve removed 49 rows and 49 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 - optimal solution found: number of colors: 2