current bounds on the number of colors: 0 -- 76 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:38:54 2012 Optimize a model with 10146 rows, 3153 columns and 33098 nonzeros Presolve time: 0.05s Presolved: 10146 rows, 3153 columns, 33098 nonzeros Variable types: 0 continuous, 3153 integer (3153 binary) Root relaxation: objective 0.000000e+00, 192 iterations, 0.01 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 (335 simplex iterations) in 0.07 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 -- 38 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:38:54 2012 Optimize a model with 5111 rows, 1709 columns and 16549 nonzeros Presolve time: 0.02s Presolved: 5111 rows, 1709 columns, 16549 nonzeros Variable types: 0 continuous, 1709 integer (1709 binary) Root relaxation: objective 0.000000e+00, 154 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 (281 simplex iterations) in 0.03 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 -- 19 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:38:55 2012 Optimize a model with 2461 rows, 949 columns and 7839 nonzeros Presolve time: 0.01s Presolved: 2461 rows, 949 columns, 7839 nonzeros Variable types: 0 continuous, 949 integer (949 binary) Root relaxation: objective 0.000000e+00, 159 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 (297 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 -- 9 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:38:55 2012 Optimize a model with 1136 rows, 569 columns and 3484 nonzeros Presolve time: 0.00s Presolved: 1136 rows, 569 columns, 3484 nonzeros Variable types: 0 continuous, 569 integer (569 binary) Root relaxation: objective 0.000000e+00, 175 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 0 148 - 0.00000 - - 0s 0 0 0.00000 0 142 - 0.00000 - - 0s * 0 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1766 simplex iterations) in 0.09 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 -- 4 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:38:55 2012 Optimize a model with 606 rows, 417 columns and 1742 nonzeros Presolve removed 76 rows and 76 columns Presolve time: 0.00s Presolved: 530 rows, 341 columns, 1590 nonzeros Variable types: 0 continuous, 341 integer (341 binary) Root relaxation: objective 0.000000e+00, 83 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 76 - 0.00000 - - 0s Explored 0 nodes (321 simplex iterations) in 0.01 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 -- 4 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:38:55 2012 Optimize a model with 871 rows, 493 columns and 2613 nonzeros Presolve time: 0.00s Presolved: 871 rows, 493 columns, 2613 nonzeros Variable types: 0 continuous, 493 integer (493 binary) Root relaxation: objective 0.000000e+00, 186 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 0 152 - 0.00000 - - 0s 0 0 0.00000 0 148 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (1427 simplex iterations) in 0.08 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: 4