current bounds on the number of colors: 0 -- 53 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:58 2012 Optimize a model with 1899 rows, 1449 columns and 6916 nonzeros Presolve removed 2 rows and 52 columns Presolve time: 0.01s Presolved: 1897 rows, 1397 columns, 6864 nonzeros Variable types: 0 continuous, 1397 integer (1397 binary) Root relaxation: objective 0.000000e+00, 113 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 (113 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 -- 26 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:58 2012 Optimize a model with 976 rows, 760 columns and 3458 nonzeros Presolve removed 2 rows and 26 columns Presolve time: 0.00s Presolved: 974 rows, 734 columns, 3432 nonzeros Variable types: 0 continuous, 734 integer (734 binary) Root relaxation: objective 0.000000e+00, 105 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 (105 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 -- 13 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:58 2012 Optimize a model with 479 rows, 389 columns and 1596 nonzeros Presolve removed 2 rows and 12 columns Presolve time: 0.00s Presolved: 477 rows, 377 columns, 1584 nonzeros Variable types: 0 continuous, 377 integer (377 binary) Root relaxation: objective 0.000000e+00, 107 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 (170 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 -- 6 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:58 2012 Optimize a model with 266 rows, 230 columns and 798 nonzeros Presolve removed 2 rows and 6 columns Presolve time: 0.00s Presolved: 264 rows, 224 columns, 792 nonzeros Variable types: 0 continuous, 224 integer (224 binary) Root relaxation: objective 0.000000e+00, 98 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 (137 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 18:19:58 2012 Optimize a model with 124 rows, 124 columns and 266 nonzeros Presolve removed 124 rows and 124 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 18:19:58 2012 Optimize a model with 195 rows, 177 columns and 532 nonzeros Presolve removed 53 rows and 55 columns Presolve time: 0.00s Presolved: 142 rows, 122 columns, 426 nonzeros Variable types: 0 continuous, 122 integer (122 binary) Root relaxation: objective 0.000000e+00, 56 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 51 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (190 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