current bounds on the number of colors: 0 -- 28 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:25 2012 Optimize a model with 294 rows, 411 columns and 1190 nonzeros Presolve removed 5 rows and 70 columns Presolve time: 0.00s Presolved: 289 rows, 341 columns, 1120 nonzeros Variable types: 0 continuous, 341 integer (341 binary) Root relaxation: objective 0.000000e+00, 40 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 (40 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 Fri Dec 14 18:19:25 2012 Optimize a model with 161 rows, 215 columns and 595 nonzeros Presolve removed 5 rows and 35 columns Presolve time: 0.00s Presolved: 156 rows, 180 columns, 560 nonzeros Variable types: 0 continuous, 180 integer (180 binary) Root relaxation: objective 0.000000e+00, 40 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 (40 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 Fri Dec 14 18:19:25 2012 Optimize a model with 85 rows, 103 columns and 255 nonzeros Presolve removed 5 rows and 15 columns Presolve time: 0.00s Presolved: 80 rows, 88 columns, 240 nonzeros Variable types: 0 continuous, 88 integer (88 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 -- 3 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:25 2012 Optimize a model with 47 rows, 47 columns and 85 nonzeros Presolve removed 47 rows and 47 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 Fri Dec 14 18:19:25 2012 Optimize a model with 66 rows, 75 columns and 170 nonzeros Presolve removed 30 rows and 36 columns Presolve time: 0.00s Presolved: 36 rows, 39 columns, 108 nonzeros Variable types: 0 continuous, 39 integer (39 binary) Root relaxation: objective 0.000000e+00, 14 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 (14 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% optimal solution found: number of colors: 2