current bounds on the number of colors: 0 -- 73 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:13:59 2012 Optimize a model with 1117 rows, 2657 columns and 5760 nonzeros Presolve removed 32 rows and 1152 columns Presolve time: 0.01s Presolved: 1085 rows, 1505 columns, 4608 nonzeros Variable types: 0 continuous, 1505 integer (1505 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 -- 36 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:13:59 2012 Optimize a model with 595 rows, 1343 columns and 2880 nonzeros Presolve removed 32 rows and 576 columns Presolve time: 0.00s Presolved: 563 rows, 767 columns, 2304 nonzeros Variable types: 0 continuous, 767 integer (767 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 16:13:59 2012 Optimize a model with 334 rows, 686 columns and 1440 nonzeros Presolve removed 32 rows and 288 columns Presolve time: 0.00s Presolved: 302 rows, 398 columns, 1152 nonzeros Variable types: 0 continuous, 398 integer (398 binary) Root relaxation: objective 0.000000e+00, 64 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 (64 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 16:13:59 2012 Optimize a model with 189 rows, 321 columns and 640 nonzeros Presolve removed 32 rows and 128 columns Presolve time: 0.00s Presolved: 157 rows, 193 columns, 512 nonzeros Variable types: 0 continuous, 193 integer (193 binary) Root relaxation: objective 0.000000e+00, 58 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 (58 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 16:13:59 2012 Optimize a model with 131 rows, 175 columns and 320 nonzeros Presolve removed 85 rows and 123 columns Presolve time: 0.00s Presolved: 46 rows, 52 columns, 138 nonzeros Variable types: 0 continuous, 52 integer (52 binary) Root relaxation: objective 0.000000e+00, 22 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 (22 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 16:13:59 2012 Optimize a model with 102 rows, 102 columns and 160 nonzeros Presolve removed 102 rows and 102 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