current bounds on the number of colors: 0 -- 74 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:14:00 2012 Optimize a model with 1184 rows, 2768 columns and 6068 nonzeros Presolve removed 32 rows and 1184 columns Presolve time: 0.01s Presolved: 1152 rows, 1584 columns, 4884 nonzeros Variable types: 0 continuous, 1584 integer (1584 binary) Root relaxation: objective 0.000000e+00, 71 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 (71 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 -- 37 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:14:00 2012 Optimize a model with 614 rows, 1362 columns and 2952 nonzeros Presolve removed 32 rows and 576 columns Presolve time: 0.00s Presolved: 582 rows, 786 columns, 2376 nonzeros Variable types: 0 continuous, 786 integer (786 binary) Root relaxation: objective 0.000000e+00, 71 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 (71 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 -- 18 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:14:00 2012 Optimize a model with 344 rows, 696 columns and 1476 nonzeros Presolve removed 32 rows and 288 columns Presolve time: 0.00s Presolved: 312 rows, 408 columns, 1188 nonzeros Variable types: 0 continuous, 408 integer (408 binary) Root relaxation: objective 0.000000e+00, 67 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 (67 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 -- 9 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:14:00 2012 Optimize a model with 194 rows, 326 columns and 656 nonzeros Presolve removed 32 rows and 128 columns Presolve time: 0.00s Presolved: 162 rows, 198 columns, 528 nonzeros Variable types: 0 continuous, 198 integer (198 binary) Root relaxation: objective 0.000000e+00, 59 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 -- 4 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:14:00 2012 Optimize a model with 134 rows, 178 columns and 328 nonzeros Presolve removed 80 rows and 115 columns Presolve time: 0.00s Presolved: 54 rows, 63 columns, 162 nonzeros Variable types: 0 continuous, 63 integer (63 binary) Root relaxation: objective 0.000000e+00, 26 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 (26 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 -- 2 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:14:00 2012 Optimize a model with 104 rows, 104 columns and 164 nonzeros Presolve removed 104 rows and 104 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 - optimal solution found: number of colors: 2