current bounds on the number of colors: 0 -- 55 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:34:43 2012 Optimize a model with 20008 rows, 2224 columns and 61344 nonzeros Presolve time: 0.08s Presolved: 20008 rows, 2224 columns, 61344 nonzeros Variable types: 0 continuous, 2224 integer (2224 binary) Root relaxation: objective 0.000000e+00, 147 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 (384 simplex iterations) in 0.13 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 -- 27 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:34:43 2012 Optimize a model with 9662 rows, 1454 columns and 29536 nonzeros Presolve time: 0.03s Presolved: 9662 rows, 1454 columns, 29536 nonzeros Variable types: 0 continuous, 1454 integer (1454 binary) Root relaxation: objective 0.000000e+00, 125 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 (1548 simplex iterations) in 0.15 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 18:34:43 2012 Optimize a model with 4489 rows, 1069 columns and 13632 nonzeros Presolve time: 0.01s Presolved: 4489 rows, 1069 columns, 13632 nonzeros Variable types: 0 continuous, 1069 integer (1069 binary) Root relaxation: objective 0.000000e+00, 111 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 80 - 0.00000 - - 0s 0 0 0.00000 0 58 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (2256 simplex iterations) in 0.31 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 18:34:44 2012 Optimize a model with 6706 rows, 1234 columns and 20448 nonzeros Presolve time: 0.02s Presolved: 6706 rows, 1234 columns, 20448 nonzeros Variable types: 0 continuous, 1234 integer (1234 binary) Root relaxation: objective 0.000000e+00, 126 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 0 0 0.00000 0 32 - 0.00000 - - 0s 0 0 0.00000 0 164 - 0.00000 - - 1s 0 0 0.00000 0 241 - 0.00000 - - 1s 0 0 0.00000 0 170 - 0.00000 - - 2s 0 0 0.00000 0 128 - 0.00000 - - 3s 0 0 0.00000 0 127 - 0.00000 - - 4s 0 0 0.00000 0 142 - 0.00000 - - 5s 0 0 0.00000 0 255 - 0.00000 - - 5s 0 0 0.00000 0 133 - 0.00000 - - 7s 0 0 0.00000 0 146 - 0.00000 - - 7s 0 0 0.00000 0 150 - 0.00000 - - 8s 0 0 0.00000 0 150 - 0.00000 - - 9s 0 2 0.00000 0 150 - 0.00000 - - 10s Cutting planes: Clique: 118 Zero half: 4 Explored 130 nodes (73266 simplex iterations) in 12.99 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 18:34:57 2012 Optimize a model with 8184 rows, 1344 columns and 24992 nonzeros Presolve time: 0.02s Presolved: 8184 rows, 1344 columns, 24992 nonzeros Variable types: 0 continuous, 1344 integer (1344 binary) Root relaxation: objective 0.000000e+00, 125 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 55 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1050 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% current bounds on the number of colors: 9 -- 11 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:34:57 2012 Optimize a model with 7445 rows, 1289 columns and 22720 nonzeros Presolve time: 0.02s Presolved: 7445 rows, 1289 columns, 22720 nonzeros Variable types: 0 continuous, 1289 integer (1289 binary) Root relaxation: objective 0.000000e+00, 117 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 46 - 0.00000 - - 0s 0 0 0.00000 0 128 - 0.00000 - - 1s 0 0 0.00000 0 184 - 0.00000 - - 1s 0 0 0.00000 0 61 - 0.00000 - - 2s 0 0 0.00000 0 172 - 0.00000 - - 2s 0 0 0.00000 0 136 - 0.00000 - - 3s 0 0 0.00000 0 114 - 0.00000 - - 4s 0 0 0.00000 0 94 - 0.00000 - - 5s 0 0 0.00000 0 164 - 0.00000 - - 5s 0 0 0.00000 0 161 - 0.00000 - - 6s 0 0 0.00000 0 128 - 0.00000 - - 7s 0 0 0.00000 0 76 - 0.00000 - - 7s 0 0 0.00000 0 89 - 0.00000 - - 8s 0 0 0.00000 0 146 - 0.00000 - - 9s 0 0 0.00000 0 146 - 0.00000 - - 10s 0 2 0.00000 0 146 - 0.00000 - - 11s * 58 1 22 0.0000000 0.00000 0.0% 111 13s Cutting planes: Clique: 45 Zero half: 2 Explored 59 nodes (64667 simplex iterations) in 13.55 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