current bounds on the number of colors: 0 -- 53 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:25:49 2012 Optimize a model with 17629 rows, 2054 columns and 54106 nonzeros Presolve time: 0.07s Presolved: 17629 rows, 2054 columns, 54106 nonzeros Variable types: 0 continuous, 2054 integer (2054 binary) Root relaxation: objective 0.000000e+00, 175 iterations, 0.02 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 (503 simplex iterations) in 0.12 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 -- 26 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:25:49 2012 Optimize a model with 8841 rows, 1365 columns and 27053 nonzeros Presolve time: 0.03s Presolved: 8841 rows, 1365 columns, 27053 nonzeros Variable types: 0 continuous, 1365 integer (1365 binary) Root relaxation: objective 0.000000e+00, 115 iterations, 0.01 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 (824 simplex iterations) in 0.08 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 -- 13 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:25:50 2012 Optimize a model with 4109 rows, 994 columns and 12486 nonzeros Presolve time: 0.01s Presolved: 4109 rows, 994 columns, 12486 nonzeros Variable types: 0 continuous, 994 integer (994 binary) Root relaxation: objective 0.000000e+00, 107 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 70 - 0.00000 - - 0s 0 0 0.00000 0 56 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (2870 simplex iterations) in 0.36 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound 1.000000000000e+00, gap - current bounds on the number of colors: 6 -- 13 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:25:50 2012 Optimize a model with 6137 rows, 1153 columns and 18729 nonzeros Presolve time: 0.02s Presolved: 6137 rows, 1153 columns, 18729 nonzeros Variable types: 0 continuous, 1153 integer (1153 binary) Root relaxation: objective 0.000000e+00, 118 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 62 - 0.00000 - - 0s 0 0 0.00000 0 38 - 0.00000 - - 0s 0 0 0.00000 0 78 - 0.00000 - - 0s 0 0 0.00000 0 238 - 0.00000 - - 0s 0 0 0.00000 0 122 - 0.00000 - - 1s 0 0 0.00000 0 116 - 0.00000 - - 1s 0 0 0.00000 0 196 - 0.00000 - - 2s 0 0 0.00000 0 214 - 0.00000 - - 3s 0 0 0.00000 0 212 - 0.00000 - - 3s 0 0 0.00000 0 215 - 0.00000 - - 3s 0 0 0.00000 0 215 - 0.00000 - - 4s 0 2 0.00000 0 215 - 0.00000 - - 4s 2 3 0.00000 1 153 - 0.00000 - 1491 5s 803 21 0.00000 0 78 - 0.00000 - 90.8 10s 808 25 0.00000 0 64 - 0.00000 - 90.2 15s 813 28 0.00000 0 120 - 0.00000 - 89.7 21s 823 35 0.00000 14 147 - 0.00000 - 142 25s 1237 11 infeasible 23 - 0.00000 - 139 30s 1678 8 0.00000 23 128 - 0.00000 - 137 35s Cutting planes: Gomory: 1 Clique: 9 Zero half: 4 Explored 1775 nodes (272254 simplex iterations) in 35.96 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound -, gap - current bounds on the number of colors: 9 -- 13 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:26:26 2012 Optimize a model with 7489 rows, 1259 columns and 22891 nonzeros Presolve time: 0.02s Presolved: 7489 rows, 1259 columns, 22891 nonzeros Variable types: 0 continuous, 1259 integer (1259 binary) Root relaxation: objective 0.000000e+00, 120 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 44 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (913 simplex iterations) in 0.08 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: 9 -- 11 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:26:26 2012 Optimize a model with 6813 rows, 1206 columns and 20810 nonzeros Presolve time: 0.02s Presolved: 6813 rows, 1206 columns, 20810 nonzeros Variable types: 0 continuous, 1206 integer (1206 binary) Root relaxation: objective 0.000000e+00, 114 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 38 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1302 simplex iterations) in 0.10 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% optimal solution found: number of colors: 10