current bounds on the number of colors: 0 -- 45 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:44 2012 Optimize a model with 1233 rows, 1044 columns and 4554 nonzeros Presolve removed 1 rows and 22 columns Presolve time: 0.01s Presolved: 1232 rows, 1022 columns, 4532 nonzeros Variable types: 0 continuous, 1022 integer (1022 binary) Root relaxation: objective 0.000000e+00, 80 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 (80 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 -- 22 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:44 2012 Optimize a model with 639 rows, 549 columns and 2277 nonzeros Presolve removed 1 rows and 11 columns Presolve time: 0.00s Presolved: 638 rows, 538 columns, 2266 nonzeros Variable types: 0 continuous, 538 integer (538 binary) Root relaxation: objective 0.000000e+00, 81 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 (81 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 -- 11 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:44 2012 Optimize a model with 315 rows, 279 columns and 1035 nonzeros Presolve removed 1 rows and 5 columns Presolve time: 0.00s Presolved: 314 rows, 274 columns, 1030 nonzeros Variable types: 0 continuous, 274 integer (274 binary) Root relaxation: objective 0.000000e+00, 96 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 (132 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 -- 5 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:44 2012 Optimize a model with 153 rows, 144 columns and 414 nonzeros Presolve removed 47 rows and 49 columns Presolve time: 0.00s Presolved: 106 rows, 95 columns, 318 nonzeros Variable types: 0 continuous, 95 integer (95 binary) Root relaxation: objective 0.000000e+00, 47 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 42 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (137 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 - current bounds on the number of colors: 2 -- 5 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:44 2012 Optimize a model with 207 rows, 189 columns and 621 nonzeros Presolve removed 1 rows and 3 columns Presolve time: 0.00s Presolved: 206 rows, 186 columns, 618 nonzeros Variable types: 0 continuous, 186 integer (186 binary) Root relaxation: objective 0.000000e+00, 87 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 (122 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: 3