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 336 rows, 414 columns and 1316 nonzeros Presolve removed 5 rows and 70 columns Presolve time: 0.00s Presolved: 331 rows, 344 columns, 1246 nonzeros Variable types: 0 continuous, 344 integer (344 binary) Root relaxation: objective 0.000000e+00, 41 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 (59 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 182 rows, 218 columns and 658 nonzeros Presolve removed 5 rows and 35 columns Presolve time: 0.00s Presolved: 177 rows, 183 columns, 623 nonzeros Variable types: 0 continuous, 183 integer (183 binary) Root relaxation: objective 0.000000e+00, 38 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 (56 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 94 rows, 106 columns and 282 nonzeros Presolve removed 5 rows and 15 columns Presolve time: 0.00s Presolved: 89 rows, 91 columns, 267 nonzeros Variable types: 0 continuous, 91 integer (91 binary) Root relaxation: objective 0.000000e+00, 31 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 (31 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 50 rows, 50 columns and 94 nonzeros Presolve removed 50 rows and 50 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 72 rows, 78 columns and 188 nonzeros Presolve removed 28 rows and 33 columns Presolve time: 0.00s Presolved: 44 rows, 45 columns, 132 nonzeros Variable types: 0 continuous, 45 integer (45 binary) Root relaxation: objective 0.000000e+00, 22 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 3 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (57 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