current bounds on the number of colors: 0 -- 68 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:13:49 2012 Optimize a model with 782 rows, 2333 columns and 4454 nonzeros Presolve removed 38 rows and 1292 columns Presolve time: 0.01s Presolved: 744 rows, 1041 columns, 3162 nonzeros Variable types: 0 continuous, 1041 integer (1041 binary) Root relaxation: objective 0.000000e+00, 50 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 (50 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 -- 34 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:13:49 2012 Optimize a model with 425 rows, 1177 columns and 2227 nonzeros Presolve removed 38 rows and 646 columns Presolve time: 0.00s Presolved: 387 rows, 531 columns, 1581 nonzeros Variable types: 0 continuous, 531 integer (531 binary) Root relaxation: objective 0.000000e+00, 50 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 (50 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 -- 17 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:13:49 2012 Optimize a model with 236 rows, 565 columns and 1048 nonzeros Presolve removed 38 rows and 304 columns Presolve time: 0.00s Presolved: 198 rows, 261 columns, 744 nonzeros Variable types: 0 continuous, 261 integer (261 binary) Root relaxation: objective 0.000000e+00, 48 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 (48 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 -- 8 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:13:49 2012 Optimize a model with 152 rows, 293 columns and 524 nonzeros Presolve removed 38 rows and 152 columns Presolve time: 0.00s Presolved: 114 rows, 141 columns, 372 nonzeros Variable types: 0 continuous, 141 integer (141 binary) Root relaxation: objective 0.000000e+00, 41 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 (41 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 16:13:49 2012 Optimize a model with 110 rows, 157 columns and 262 nonzeros Presolve removed 78 rows and 121 columns Presolve time: 0.00s Presolved: 32 rows, 36 columns, 96 nonzeros Variable types: 0 continuous, 36 integer (36 binary) Root relaxation: objective 0.000000e+00, 16 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 (16 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 16:13:49 2012 Optimize a model with 89 rows, 89 columns and 131 nonzeros Presolve removed 89 rows and 89 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