Iteration final - SOLVER_EXECUTION
Sequence: 6
Timestamp: 2025-07-27 21:46:24

Prompt:
Generated solver codes with templates and executed them with retry logic

Response:
{
  "gurobipy": {
    "solver_type": "gurobipy",
    "execution_time": 0.756636381149292,
    "return_code": 0,
    "stdout": "Restricted license - for non-production use only - expires 2026-11-23\nGurobi Optimizer version 12.0.2 build v12.0.2rc0 (linux64 - \"Red Hat Enterprise Linux 9.4 (Plow)\")\n\nCPU model: AMD EPYC 7513 32-Core Processor, instruction set [SSE2|AVX|AVX2]\nThread count: 64 physical cores, 128 logical processors, using up to 32 threads\n\nOptimize a model with 24 rows, 12 columns and 48 nonzeros\nModel fingerprint: 0x6bd58dd1\nVariable types: 0 continuous, 12 integer (12 binary)\nCoefficient statistics:\n  Matrix range     [1e+00, 2e+00]\n  Objective range  [1e+00, 1e+00]\n  Bounds range     [1e+00, 1e+00]\n  RHS range        [1e+00, 1e+00]\nFound heuristic solution: objective 2.0000000\nPresolve removed 9 rows and 0 columns\nPresolve time: 0.00s\nPresolved: 15 rows, 12 columns, 39 nonzeros\nVariable types: 0 continuous, 12 integer (12 binary)\n\nRoot relaxation: cutoff, 10 iterations, 0.00 seconds (0.00 work units)\n\n    Nodes    |    Current Node    |     Objective Bounds      |     Work\n Expl Unexpl |  Obj  Depth IntInf | Incumbent    BestBd   Gap | It/Node Time\n\n     0     0     cutoff    0         2.00000    2.00000  0.00%     -    0s\n\nExplored 1 nodes (10 simplex iterations) in 0.00 seconds (0.00 work units)\nThread count was 32 (of 128 available processors)\n\nSolution count 1: 2 \n\nOptimal solution found (tolerance 1.00e-04)\nBest objective 2.000000000000e+00, best bound 2.000000000000e+00, gap 0.0000%\nOptimal value: 2.0\nSession 1 includes papers: [2]\nSession 3 includes papers: [1, 3]\n",
    "stderr": "",
    "status": "optimal",
    "optimal_value": 2.0,
    "error_message": null,
    "decision_variables": {}
  },
  "docplex": {
    "solver_type": "docplex",
    "execution_time": 5.613398313522339,
    "return_code": 0,
    "stdout": "Optimal value: 2.0\nx[1,2] = 1.000\nx[2,1] = 1.000\nx[3,1] = 1.000\n",
    "stderr": "",
    "status": "optimal",
    "optimal_value": 2.0,
    "error_message": null,
    "decision_variables": {}
  },
  "pyomo": {
    "solver_type": "pyomo",
    "execution_time": 1.583003282546997,
    "return_code": 0,
    "stdout": "Read LP format model from file /tmp/tmpxob2uvl2.pyomo.lp\nReading time = 0.00 seconds\nx1: 24 rows, 12 columns, 48 nonzeros\nGurobi Optimizer version 12.0.2 build v12.0.2rc0 (linux64 - \"Red Hat Enterprise Linux 9.4 (Plow)\")\n\nCPU model: AMD EPYC 7513 32-Core Processor, instruction set [SSE2|AVX|AVX2]\nThread count: 64 physical cores, 128 logical processors, using up to 32 threads\n\nOptimize a model with 24 rows, 12 columns and 48 nonzeros\nModel fingerprint: 0x92ec2884\nVariable types: 0 continuous, 12 integer (12 binary)\nCoefficient statistics:\n  Matrix range     [1e+00, 2e+00]\n  Objective range  [1e+00, 1e+00]\n  Bounds range     [1e+00, 1e+00]\n  RHS range        [1e+00, 1e+00]\nFound heuristic solution: objective 2.0000000\nPresolve removed 9 rows and 0 columns\nPresolve time: 0.00s\nPresolved: 15 rows, 12 columns, 39 nonzeros\nVariable types: 0 continuous, 12 integer (12 binary)\n\nRoot relaxation: cutoff, 10 iterations, 0.00 seconds (0.00 work units)\n\n    Nodes    |    Current Node    |     Objective Bounds      |     Work\n Expl Unexpl |  Obj  Depth IntInf | Incumbent    BestBd   Gap | It/Node Time\n\n     0     0     cutoff    0         2.00000    2.00000  0.00%     -    0s\n\nExplored 1 nodes (10 simplex iterations) in 0.00 seconds (0.00 work units)\nThread count was 32 (of 128 available processors)\n\nSolution count 1: 2 \n\nOptimal solution found (tolerance 1.00e-04)\nBest objective 2.000000000000e+00, best bound 2.000000000000e+00, gap 0.0000%\nOptimal solution found!\nOptimal value: 2.0\n\nPaper-session assignments:\nPaper 1 is scheduled in session 3\nPaper 2 is scheduled in session 1\nPaper 3 is scheduled in session 3\n",
    "stderr": "",
    "status": "optimal",
    "optimal_value": 2.0,
    "error_message": null,
    "decision_variables": {}
  }
}
