current bounds on the number of colors: 0 -- 52 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:57 2012 Optimize a model with 2028 rows, 1428 columns and 7280 nonzeros Presolve removed 2 rows and 52 columns Presolve time: 0.01s Presolved: 2026 rows, 1376 columns, 7228 nonzeros Variable types: 0 continuous, 1376 integer (1376 binary) Root relaxation: objective 0.000000e+00, 102 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 (154 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 -- 26 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:57 2012 Optimize a model with 1040 rows, 752 columns and 3640 nonzeros Presolve removed 2 rows and 26 columns Presolve time: 0.00s Presolved: 1038 rows, 726 columns, 3614 nonzeros Variable types: 0 continuous, 726 integer (726 binary) Root relaxation: objective 0.000000e+00, 102 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 (169 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 18:19:57 2012 Optimize a model with 508 rows, 388 columns and 1680 nonzeros Presolve removed 2 rows and 12 columns Presolve time: 0.00s Presolved: 506 rows, 376 columns, 1668 nonzeros Variable types: 0 continuous, 376 integer (376 binary) Root relaxation: objective 0.000000e+00, 106 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 (106 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 18:19:57 2012 Optimize a model with 280 rows, 232 columns and 840 nonzeros Presolve removed 2 rows and 6 columns Presolve time: 0.00s Presolved: 278 rows, 226 columns, 834 nonzeros Variable types: 0 continuous, 226 integer (226 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 (158 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 18:19:57 2012 Optimize a model with 128 rows, 128 columns and 280 nonzeros Presolve removed 128 rows and 128 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 18:19:57 2012 Optimize a model with 204 rows, 180 columns and 560 nonzeros Presolve removed 52 rows and 54 columns Presolve time: 0.00s Presolved: 152 rows, 126 columns, 456 nonzeros Variable types: 0 continuous, 126 integer (126 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 50 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (176 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