current bounds on the number of colors: 0 -- 66 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:13:45 2012 Optimize a model with 759 rows, 2199 columns and 4257 nonzeros Presolve removed 33 rows and 1089 columns Presolve time: 0.01s Presolved: 726 rows, 1110 columns, 3168 nonzeros Variable types: 0 continuous, 1110 integer (1110 binary) Root relaxation: objective 0.000000e+00, 52 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 (52 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 -- 33 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:13:45 2012 Optimize a model with 402 rows, 1077 columns and 2064 nonzeros Presolve removed 33 rows and 528 columns Presolve time: 0.00s Presolved: 369 rows, 549 columns, 1536 nonzeros Variable types: 0 continuous, 549 integer (549 binary) Root relaxation: objective 0.000000e+00, 53 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 (53 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 -- 16 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:13:45 2012 Optimize a model with 234 rows, 549 columns and 1032 nonzeros Presolve removed 33 rows and 264 columns Presolve time: 0.00s Presolved: 201 rows, 285 columns, 768 nonzeros Variable types: 0 continuous, 285 integer (285 binary) Root relaxation: objective 0.000000e+00, 51 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 (51 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 16:13:45 2012 Optimize a model with 150 rows, 285 columns and 516 nonzeros Presolve removed 33 rows and 132 columns Presolve time: 0.00s Presolved: 117 rows, 153 columns, 384 nonzeros Variable types: 0 continuous, 153 integer (153 binary) Root relaxation: objective 0.000000e+00, 46 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 (46 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 16:13:45 2012 Optimize a model with 108 rows, 153 columns and 258 nonzeros Presolve removed 78 rows and 117 columns Presolve time: 0.00s Presolved: 30 rows, 36 columns, 90 nonzeros Variable types: 0 continuous, 36 integer (36 binary) Root relaxation: objective 0.000000e+00, 13 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 (13 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 16:13:45 2012 Optimize a model with 87 rows, 87 columns and 129 nonzeros Presolve removed 87 rows and 87 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