current bounds on the number of colors: 0 -- 75 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:14:01 2012 Optimize a model with 1111 rows, 2803 columns and 5883 nonzeros Presolve removed 32 rows and 1184 columns Presolve time: 0.01s Presolved: 1079 rows, 1619 columns, 4699 nonzeros Variable types: 0 continuous, 1619 integer (1619 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 0.01 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 16:14:01 2012 Optimize a model with 579 rows, 1378 columns and 2862 nonzeros Presolve removed 32 rows and 576 columns Presolve time: 0.00s Presolved: 547 rows, 802 columns, 2286 nonzeros Variable types: 0 continuous, 802 integer (802 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 -- 18 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:14:02 2012 Optimize a model with 327 rows, 703 columns and 1431 nonzeros Presolve removed 32 rows and 288 columns Presolve time: 0.00s Presolved: 295 rows, 415 columns, 1143 nonzeros Variable types: 0 continuous, 415 integer (415 binary) Root relaxation: objective 0.000000e+00, 69 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 (69 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 16:14:02 2012 Optimize a model with 187 rows, 328 columns and 636 nonzeros Presolve removed 32 rows and 128 columns Presolve time: 0.00s Presolved: 155 rows, 200 columns, 508 nonzeros Variable types: 0 continuous, 200 integer (200 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 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (62 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 16:14:02 2012 Optimize a model with 131 rows, 178 columns and 318 nonzeros Presolve removed 95 rows and 137 columns Presolve time: 0.00s Presolved: 36 rows, 41 columns, 108 nonzeros Variable types: 0 continuous, 41 integer (41 binary) Root relaxation: objective 0.000000e+00, 14 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 (14 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 16:14:02 2012 Optimize a model with 103 rows, 103 columns and 159 nonzeros Presolve removed 103 rows and 103 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