current bounds on the number of colors: 0 -- 60 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:20:14 2012 Optimize a model with 2430 rows, 1879 columns and 8910 nonzeros Presolve removed 3 rows and 90 columns Presolve time: 0.02s Presolved: 2427 rows, 1789 columns, 8820 nonzeros Variable types: 0 continuous, 1789 integer (1789 binary) Root relaxation: objective 0.000000e+00, 112 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 (162 simplex iterations) in 0.02 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 -- 30 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:20:14 2012 Optimize a model with 1245 rows, 979 columns and 4455 nonzeros Presolve removed 3 rows and 45 columns Presolve time: 0.01s Presolved: 1242 rows, 934 columns, 4410 nonzeros Variable types: 0 continuous, 934 integer (934 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 (175 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 -- 15 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:20:14 2012 Optimize a model with 613 rows, 499 columns and 2079 nonzeros Presolve removed 3 rows and 21 columns Presolve time: 0.00s Presolved: 610 rows, 478 columns, 2058 nonzeros Variable types: 0 continuous, 478 integer (478 binary) Root relaxation: objective 0.000000e+00, 110 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 (161 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 18:20:14 2012 Optimize a model with 297 rows, 259 columns and 891 nonzeros Presolve removed 3 rows and 9 columns Presolve time: 0.00s Presolved: 294 rows, 250 columns, 882 nonzeros Variable types: 0 continuous, 250 integer (250 binary) Root relaxation: objective 0.000000e+00, 115 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 (160 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 18:20:14 2012 Optimize a model with 139 rows, 139 columns and 297 nonzeros Presolve removed 139 rows and 139 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 18:20:14 2012 Optimize a model with 218 rows, 199 columns and 594 nonzeros Presolve removed 60 rows and 63 columns Presolve time: 0.00s Presolved: 158 rows, 136 columns, 474 nonzeros Variable types: 0 continuous, 136 integer (136 binary) Root relaxation: objective 0.000000e+00, 62 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 57 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (240 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