Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr Chemical_master_Chemical.Boundaries.Tests.TestExternalSubstance.conf.json loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.1.0+maint.om/package.mo", uses=false) [Timeout 180] "Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.1.0+maint.om/package.mo): time 0.001199/0.001199, allocations: 77.09 kB / 20.65 MB, free: 3.852 MB / 18.57 MB " [Timeout remaining time 180] loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.1.0+maint.om/package.mo", uses=false) [Timeout 180] "Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.1.0+maint.om/package.mo): time 0.001388/0.001388, allocations: 165 kB / 24.05 MB, free: 464 kB / 18.57 MB " [Timeout remaining time 180] loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.1.0+maint.om/package.mo", uses=false) [Timeout 180] "Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.1.0+maint.om/package.mo): time 0.992/0.992, allocations: 177.1 MB / 204.5 MB, free: 5.508 MB / 186.7 MB " [Timeout remaining time 179] loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Chemical master/package.mo", uses=false) [Timeout 180] "Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Chemical master/package.mo): time 0.09352/0.09352, allocations: 17.46 MB / 278.5 MB, free: 11.4 MB / 266.7 MB " [Timeout remaining time 180] Using package Chemical with version 2.0.1 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Chemical master/package.mo) Using package Modelica with version 4.1.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.1.0+maint.om/package.mo) Using package Complex with version 4.1.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.1.0+maint.om/package.mo) Using package ModelicaServices with version 4.1.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.1.0+maint.om/package.mo) Running command: translateModel(Chemical.Boundaries.Tests.TestExternalSubstance,tolerance=1e-06,outputFormat="empty",numberOfIntervals=1000,variableFilter="",fileNamePrefix="Chemical_master_Chemical.Boundaries.Tests.TestExternalSubstance") translateModel(Chemical.Boundaries.Tests.TestExternalSubstance,tolerance=1e-06,outputFormat="empty",numberOfIntervals=1000,variableFilter="",fileNamePrefix="Chemical_master_Chemical.Boundaries.Tests.TestExternalSubstance") [Timeout 660] "Notification: Performance of FrontEnd - loaded program: time 1.533e-06/1.533e-06, allocations: 0 / 354.8 MB, free: 9.57 MB / 282.7 MB Notification: Performance of FrontEnd - Absyn->SCode: time 2.214e-05/2.368e-05, allocations: 2.312 kB / 354.8 MB, free: 9.566 MB / 282.7 MB [/home/hudson/saved_omc/libraries/.openmodelica/libraries/Chemical master/Interfaces.mo:1586:5-1586:64:writable] Warning: An inner declaration for outer component system could not be found and was automatically generated. [/home/hudson/saved_omc/libraries/.openmodelica/libraries/Chemical master/Interfaces.mo:1586:5-1586:64:writable] Notification: The diagnostics message for the missing inner is: Your model is using an outer \"system\" component but an inner \"system\" component is not defined. For simulation drag Modelica.Fluid.System into your model to specify system properties. [/home/hudson/saved_omc/libraries/.openmodelica/libraries/Chemical master/Boundaries.mo:1361:7-1361:76:writable] Warning: An inner declaration for outer component dropOfCommons could not be found and was automatically generated. [/home/hudson/saved_omc/libraries/.openmodelica/libraries/Chemical master/Boundaries.mo:1361:7-1361:76:writable] Notification: The diagnostics message for the missing inner is: Your model is using an outer \"dropOfCommons\" component but an inner \"dropOfCommons\" component is not defined. Use Chemical.DropOfCommons in your model to specify system properties. Notification: Performance of NFInst.instantiate(Chemical.Boundaries.Tests.TestExternalSubstance): time 0.04703/0.04705, allocations: 52.07 MB / 406.8 MB, free: 5.543 MB / 330.7 MB Notification: Performance of NFInst.instExpressions: time 0.1556/0.2026, allocations: 13.99 MB / 420.8 MB, free: 34.12 MB / 330.7 MB Notification: Performance of NFInst.updateImplicitVariability: time 0.007858/0.2105, allocations: 196.1 kB / 421 MB, free: 34.12 MB / 330.7 MB Notification: Performance of NFTyping.typeComponents: time 0.006359/0.2168, allocations: 2.047 MB / 423.1 MB, free: 34.05 MB / 330.7 MB Notification: Performance of NFTyping.typeBindings: time 0.00892/0.2257, allocations: 3.257 MB / 426.3 MB, free: 32.73 MB / 330.7 MB Notification: Performance of NFTyping.typeClassSections: time 0.004936/0.2307, allocations: 2.063 MB / 428.4 MB, free: 31.74 MB / 330.7 MB Notification: Performance of NFFlatten.flatten: time 0.008875/0.2396, allocations: 7.901 MB / 436.3 MB, free: 27.65 MB / 330.7 MB Notification: Performance of NFFlatten.resolveConnections: time 0.00216/0.2417, allocations: 1.762 MB / 438.1 MB, free: 26.67 MB / 330.7 MB Notification: Performance of NFEvalConstants.evaluate: time 0.004986/0.2467, allocations: 4.655 MB / 442.7 MB, free: 23.91 MB / 330.7 MB Notification: Performance of NFSimplifyModel.simplify: time 0.003679/0.2504, allocations: 3.311 MB / 446 MB, free: 22.34 MB / 330.7 MB Notification: Performance of NFPackage.collectConstants: time 0.001008/0.2514, allocations: 0.724 MB / 446.7 MB, free: 22.34 MB / 330.7 MB Notification: Performance of NFFlatten.collectFunctions: time 0.003548/0.2549, allocations: 1.885 MB / 448.6 MB, free: 20.82 MB / 330.7 MB Notification: Performance of NFScalarize.scalarize: time 0.001119/0.2561, allocations: 2.381 MB / 451 MB, free: 18.54 MB / 330.7 MB Notification: Performance of NFVerifyModel.verify: time 0.002318/0.2584, allocations: 2.696 MB / 453.7 MB, free: 15.95 MB / 330.7 MB Notification: Performance of NFConvertDAE.convert: time 0.006502/0.2649, allocations: 8.237 MB / 461.9 MB, free: 8.305 MB / 330.7 MB Notification: Performance of FrontEnd - DAE generated: time 4.729e-06/0.2649, allocations: 0 / 461.9 MB, free: 8.305 MB / 330.7 MB Notification: Performance of FrontEnd: time 1.293e-06/0.2649, allocations: 0 / 461.9 MB, free: 8.305 MB / 330.7 MB Notification: Performance of Transformations before backend: time 0.0002149/0.2651, allocations: 2.688 kB / 461.9 MB, free: 8.305 MB / 330.7 MB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 2385 * Number of variables: 2385 Notification: Performance of Generate backend data structure: time 0.008354/0.2735, allocations: 9.544 MB / 471.5 MB, free: 15.27 MB / 346.7 MB Notification: Performance of prepare preOptimizeDAE: time 3.639e-05/0.2735, allocations: 12.03 kB / 471.5 MB, free: 15.26 MB / 346.7 MB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.004054/0.2775, allocations: 3.474 MB / 475 MB, free: 11.8 MB / 346.7 MB Notification: Performance of preOpt evaluateParameters (simulation): time 0.005023/0.2826, allocations: 4.354 MB / 479.3 MB, free: 7.457 MB / 346.7 MB Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.0006019/0.2832, allocations: 0.9757 MB / 480.3 MB, free: 6.41 MB / 346.7 MB Notification: Performance of preOpt expandDerOperator (simulation): time 0.0007731/0.2839, allocations: 0.7449 MB / 481.1 MB, free: 5.684 MB / 346.7 MB Notification: Performance of preOpt clockPartitioning (simulation): time 0.009519/0.2935, allocations: 8.906 MB / 490 MB, free: 12.83 MB / 362.7 MB Notification: Performance of preOpt findStateOrder (simulation): time 0.0001077/0.2936, allocations: 12.06 kB / 490 MB, free: 12.82 MB / 362.7 MB Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.0003817/0.294, allocations: 324.4 kB / 490.3 MB, free: 12.52 MB / 362.7 MB Notification: Performance of preOpt inlineArrayEqn (simulation): time 0.0007935/0.2947, allocations: 1.172 MB / 491.5 MB, free: 11.34 MB / 362.7 MB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.008935/0.3037, allocations: 9.623 MB / 0.4893 GB, free: 1.656 MB / 362.7 MB Notification: Performance of preOpt removeSimpleEquations (simulation): time 0.04446/0.3481, allocations: 38.79 MB / 0.5272 GB, free: 11.37 MB / 410.7 MB Notification: Performance of preOpt comSubExp (simulation): time 0.004393/0.3525, allocations: 1.642 MB / 0.5288 GB, free: 9.727 MB / 410.7 MB Notification: Performance of preOpt resolveLoops (simulation): time 0.001785/0.3543, allocations: 0.8037 MB / 0.5296 GB, free: 8.914 MB / 410.7 MB Notification: Performance of preOpt evalFunc (simulation): time 0.01526/0.3696, allocations: 10.03 MB / 0.5394 GB, free: 14.99 MB / 426.7 MB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 4.527e-05/0.3696, allocations: 66.62 kB / 0.5395 GB, free: 14.91 MB / 426.7 MB Notification: Performance of pre-optimization done (n=226): time 3.546e-06/0.3696, allocations: 0 / 0.5395 GB, free: 14.91 MB / 426.7 MB Notification: Performance of matching and sorting (n=290): time 0.052/0.4216, allocations: 16.47 MB / 0.5555 GB, free: 14.54 MB / 442.7 MB Error: Internal error IndexReduction.pantelidesIndexReduction failed! System is structurally singular and cannot be handled because the number of unassigned equations is larger than the number of states. Use -d=bltdump to get more information. Error: Internal error Transformation Module PFPlusExt index Reduction Method Pantelides failed! Notification: Performance of inlineWhenForInitialization (initialization): time 0.0005108/0.4221, allocations: 0.9218 MB / 0.5564 GB, free: 13.56 MB / 442.7 MB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.00293/0.4251, allocations: 3.498 MB / 0.5599 GB, free: 10.61 MB / 442.7 MB Notification: Performance of collectPreVariables (initialization): time 0.0004049/0.4255, allocations: 72.39 kB / 0.5599 GB, free: 10.53 MB / 442.7 MB Notification: Performance of collectInitialEqns (initialization): time 0.002572/0.4281, allocations: 4.543 MB / 0.5644 GB, free: 6.141 MB / 442.7 MB Notification: Performance of collectInitialBindings (initialization): time 0.0009506/0.429, allocations: 1.032 MB / 0.5654 GB, free: 5.168 MB / 442.7 MB Notification: Performance of simplifyInitialFunctions (initialization): time 0.002065/0.4311, allocations: 1.222 MB / 0.5666 GB, free: 4.027 MB / 442.7 MB Notification: Performance of setup shared object (initialization): time 0.0001173/0.4312, allocations: 480.8 kB / 0.567 GB, free: 3.555 MB / 442.7 MB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0032/0.4344, allocations: 1.273 MB / 0.5683 GB, free: 2.281 MB / 442.7 MB Notification: Performance of partitionIndependentBlocks (initialization): time 0.2929/0.7273, allocations: 3.321 MB / 0.5715 GB, free: 116.9 MB / 442.8 MB Notification: Performance of analyzeInitialSystem (initialization): time 0.009055/0.7364, allocations: 6.512 MB / 0.5779 GB, free: 114.4 MB / 442.8 MB Notification: Performance of solveInitialSystemEqSystem (initialization): time 2.726e-05/0.7364, allocations: 16.25 kB / 0.5779 GB, free: 114.4 MB / 442.8 MB Notification: Performance of matching and sorting (n=507) (initialization): time 0.009694/0.7461, allocations: 5.649 MB / 0.5834 GB, free: 114.1 MB / 442.8 MB Notification: Performance of prepare postOptimizeDAE: time 3.733e-05/0.7461, allocations: 27.7 kB / 0.5834 GB, free: 114.1 MB / 442.8 MB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 4.005e-05/0.7462, allocations: 46.62 kB / 0.5835 GB, free: 114.1 MB / 442.8 MB Notification: Performance of postOpt tearingSystem (initialization): time 0.002957/0.7491, allocations: 1.08 MB / 0.5845 GB, free: 114 MB / 442.8 MB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.01817/0.7673, allocations: 3.272 MB / 0.5877 GB, free: 114 MB / 442.8 MB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.009427/0.7767, allocations: 29.42 MB / 0.6165 GB, free: 85.49 MB / 442.8 MB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0035/0.7802, allocations: 169.5 kB / 0.6166 GB, free: 85.49 MB / 442.8 MB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0007964/0.781, allocations: 0.753 MB / 0.6174 GB, free: 85.49 MB / 442.8 MB Warning: Assuming fixed start value for the following 8 variables: boundaryFore2.rear.n_flow:VARIABLE(flow=true unit = \"mol/s\" fixed = true ) \"Molar change of the substance\" type: Real boundaryRear1.fore.n_flow:VARIABLE(flow=true unit = \"mol/s\" fixed = true ) \"Molar change of the substance\" type: Real boundaryFore1.rear.n_flow:VARIABLE(flow=true unit = \"mol/s\" fixed = true ) \"Molar change of the substance\" type: Real boundaryRear4.fore.n_flow:VARIABLE(flow=true unit = \"mol/s\" fixed = true ) \"Molar change of the substance\" type: Real boundaryFore3.rear.n_flow:VARIABLE(flow=true unit = \"mol/s\" fixed = true ) \"Molar change of the substance\" type: Real boundaryRear3.fore.n_flow:VARIABLE(flow=true unit = \"mol/s\" fixed = true ) \"Molar change of the substance\" type: Real boundaryRear2.fore.n_flow:VARIABLE(flow=true unit = \"mol/s\" fixed = true ) \"Molar change of the substance\" type: Real boundaryFore.rear.n_flow:VARIABLE(flow=true unit = \"mol/s\" fixed = true ) \"Molar change of the substance\" type: Real Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 211 * Number of states: 0 () * Number of discrete variables: 6 (externalIdealGas.substanceDefinitionVar.data.phase,externalIdealGas.substanceDefinitionVar.SelfClustering,externalSubstance2.substanceDefinitionVar.data.phase,externalSubstance2.substanceDefinitionVar.SelfClustering,solvent.substanceDefinitionVar.data.phase,solvent.substanceDefinitionVar.SelfClustering) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (479): * Single equations (assignments): 462 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 6 * Torn equation systems: 11 * Mixed (continuous/discrete) equation systems: 0 Notification: Equation system details (not torn): * Constant Jacobian (size): 0 systems * Linear Jacobian (size,density): 0 systems * Non-linear Jacobian (size): 6 systems {1, 1, 1, 1, 1, 1} * Without analytic Jacobian (size): 0 systems Notification: Torn system details for strict tearing set: * Linear torn systems (#iteration vars, #inner vars, density): 9 systems {(1,1,100.0%), (1,1,100.0%), (1,1,100.0%), (1,1,100.0%), (2,1,100.0%), (1,1,100.0%), (1,1,100.0%), (1,1,100.0%), (1,1,100.0%)} * Non-linear torn systems (#iteration vars, #inner vars): 2 systems {(1,16), (2,1)} Notification: Performance of prepare postOptimizeDAE: time 0.002414/0.7834, allocations: 462.2 kB / 0.6178 GB, free: 85.32 MB / 442.8 MB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.001204/0.7846, allocations: 0.5589 MB / 0.6183 GB, free: 85.2 MB / 442.8 MB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.009904/0.7945, allocations: 6.801 MB / 0.625 GB, free: 84.54 MB / 442.8 MB Notification: Performance of postOpt inlineArrayEqn (simulation): time 1.404e-05/0.7946, allocations: 25.66 kB / 0.625 GB, free: 84.54 MB / 442.8 MB Notification: Performance of postOpt constantLinearSystem (simulation): time 8.406e-06/0.7946, allocations: 7.469 kB / 0.625 GB, free: 84.54 MB / 442.8 MB Notification: Performance of postOpt simplifysemiLinear (simulation): time 1.63e-05/0.7946, allocations: 11.11 kB / 0.625 GB, free: 84.54 MB / 442.8 MB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.01677/0.8114, allocations: 14.97 MB / 0.6397 GB, free: 77.62 MB / 442.8 MB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 9.238e-06/0.8114, allocations: 12 kB / 0.6397 GB, free: 77.61 MB / 442.8 MB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.01535/0.8267, allocations: 2.488 MB / 0.6421 GB, free: 75.23 MB / 442.8 MB Notification: Performance of postOpt tearingSystem (simulation): time 0.00315/0.8299, allocations: 1.149 MB / 0.6432 GB, free: 74.08 MB / 442.8 MB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 0.0003452/0.8302, allocations: 155.8 kB / 0.6434 GB, free: 73.93 MB / 442.8 MB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.009141/0.8394, allocations: 29.58 MB / 0.6722 GB, free: 42.8 MB / 442.8 MB Error: Internal error IndexReduction.pantelidesIndexReduction failed! System is structurally singular and cannot be handled because the number of unassigned equations is larger than the number of states. Use -d=bltdump to get more information. Error: Internal error Transformation Module PFPlusExt index Reduction Method Pantelides failed! Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 0.0002963/0.8396, allocations: 0.7792 MB / 0.673 GB, free: 42.01 MB / 442.8 MB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.006955/0.8466, allocations: 4.771 MB / 0.6777 GB, free: 36.98 MB / 442.8 MB Notification: Performance of postOpt removeConstants (simulation): time 0.0005687/0.8472, allocations: 362.4 kB / 0.678 GB, free: 36.63 MB / 442.8 MB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0005414/0.8477, allocations: 71.88 kB / 0.6781 GB, free: 36.57 MB / 442.8 MB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.00129/0.849, allocations: 90.62 kB / 0.6782 GB, free: 36.48 MB / 442.8 MB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0005051/0.8495, allocations: 319.8 kB / 0.6785 GB, free: 36.18 MB / 442.8 MB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 0.0002404/0.8497, allocations: 247.9 kB / 0.6787 GB, free: 35.93 MB / 442.8 MB Notification: Performance of sorting global known variables: time 0.001803/0.8516, allocations: 2.388 MB / 0.681 GB, free: 33.72 MB / 442.8 MB Notification: Performance of sort global known variables: time 8.1e-08/0.8516, allocations: 3.469 kB / 0.681 GB, free: 33.72 MB / 442.8 MB Notification: Performance of remove unused functions: time 0.00573/0.8573, allocations: 1.753 MB / 0.6828 GB, free: 31.99 MB / 442.8 MB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 44 * Number of states: 10 (boundaryFore1.rear.n_flow,boundaryRear1.fore.n_flow,boundaryFore2.rear.n_flow,boundaryRear4.fore.n_flow,$STATESET1.x,boundaryFore.rear.n_flow,boundaryRear2.fore.n_flow,boundaryRear3.fore.n_flow,boundaryFore3.rear.n_flow,solvent.logm) * Number of discrete variables: 0 () * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for simulation (252): * Single equations (assignments): 235 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 6 * Torn equation systems: 11 * Mixed (continuous/discrete) equation systems: 0 Notification: Equation system details (not torn): * Constant Jacobian (size): 0 systems * Linear Jacobian (size,density): 0 systems * Non-linear Jacobian (size): 6 systems {1, 1, 1, 1, 1, 1} * Without analytic Jacobian (size): 0 systems Notification: Torn system details for strict tearing set: * Linear torn systems (#iteration vars, #inner vars, density): 9 systems {(1,1,100.0%), (1,1,100.0%), (1,1,100.0%), (1,1,100.0%), (2,1,100.0%), (1,1,100.0%), (1,1,100.0%), (1,1,100.0%), (1,1,100.0%)} * Non-linear torn systems (#iteration vars, #inner vars): 2 systems {(1,18), (3,3)} Notification: Performance of Backend phase and start with SimCode phase: time 0.0008159/0.8581, allocations: 0.4996 MB / 0.6832 GB, free: 31.63 MB / 442.8 MB Notification: Performance of simCode: created initialization part: time 0.01223/0.8703, allocations: 5.833 MB / 0.6889 GB, free: 25.87 MB / 442.8 MB Notification: Performance of simCode: created event and clocks part: time 9.077e-06/0.8703, allocations: 0 / 0.6889 GB, free: 25.87 MB / 442.8 MB Notification: Performance of simCode: created simulation system equations: time 0.007744/0.8781, allocations: 3.793 MB / 0.6926 GB, free: 22.03 MB / 442.8 MB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.003527/0.8816, allocations: 1.108 MB / 0.6937 GB, free: 21 MB / 442.8 MB [/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelica/OMCompiler/Compiler/SimCode/SimCodeUtil.mo:4595:9-4595:59:writable] Error: Internal error function createStateSetsSets failed. [/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelica/OMCompiler/Compiler/SimCode/SimCodeUtil.mo:827:5-827:146:writable] Error: Internal error function createSimCode failed [Transformation from optimised DAE to simulation code structure failed] " [Timeout remaining time 659] [Calling sys.exit(0), Time elapsed: 2.683017275761813]