Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr ThermoPower_ThermoPower.Test.WaterComponents.TestMixerSlowFast.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 0.000993/0.000993, allocations: 78.66 kB / 21.42 MB, free: 3.074 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 0.00103/0.00103, allocations: 170.3 kB / 24.82 MB, free: 9.266 MB / 18.57 MB " [Timeout remaining time 180] loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 3.2.3+maint.om/package.mo", uses=false) [Timeout 180] "Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 3.2.3+maint.om/package.mo): time 0.853/0.853, allocations: 158.6 MB / 186.7 MB, free: 2.766 MB / 170.7 MB " [Timeout remaining time 179] loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/ThermoPower master/package.mo", uses=false) [Timeout 180] "Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ThermoPower master/package.mo): time 0.1782/0.1782, allocations: 36.34 MB / 275.4 MB, free: 10.48 MB / 266.7 MB " [Timeout remaining time 180] Using package ThermoPower with version 3.1 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/ThermoPower master/package.mo) Using package Modelica with version 3.2.3 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 3.2.3+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(ThermoPower.Test.WaterComponents.TestMixerSlowFast,tolerance=1e-06,outputFormat="empty",numberOfIntervals=2500,variableFilter="",fileNamePrefix="ThermoPower_ThermoPower.Test.WaterComponents.TestMixerSlowFast") translateModel(ThermoPower.Test.WaterComponents.TestMixerSlowFast,tolerance=1e-06,outputFormat="empty",numberOfIntervals=2500,variableFilter="",fileNamePrefix="ThermoPower_ThermoPower.Test.WaterComponents.TestMixerSlowFast") [Timeout 660] "Notification: Performance of FrontEnd - loaded program: time 2.415e-06/2.415e-06, allocations: 0 / 354.3 MB, free: 3.156 MB / 282.7 MB Notification: Performance of FrontEnd - Absyn->SCode: time 2.439e-05/2.68e-05, allocations: 5.969 kB / 354.3 MB, free: 3.152 MB / 282.7 MB Notification: Performance of NFInst.instantiate(ThermoPower.Test.WaterComponents.TestMixerSlowFast): time 0.02024/0.02027, allocations: 15.73 MB / 370 MB, free: 3.352 MB / 298.7 MB Notification: Performance of NFInst.instExpressions: time 0.01134/0.03161, allocations: 9.008 MB / 379 MB, free: 10.31 MB / 314.7 MB Notification: Performance of NFInst.updateImplicitVariability: time 0.0004555/0.03206, allocations: 11.88 kB / 379 MB, free: 10.3 MB / 314.7 MB Notification: Performance of NFTyping.typeComponents: time 0.0005417/0.0326, allocations: 146.9 kB / 379.2 MB, free: 10.15 MB / 314.7 MB Notification: Performance of NFTyping.typeBindings: time 0.0005376/0.03314, allocations: 353.3 kB / 379.5 MB, free: 9.805 MB / 314.7 MB Notification: Performance of NFTyping.typeClassSections: time 0.00932/0.04246, allocations: 4.53 MB / 384 MB, free: 5.258 MB / 314.7 MB Notification: Performance of NFFlatten.flatten: time 0.0009865/0.04345, allocations: 0.9921 MB / 385 MB, free: 4.258 MB / 314.7 MB Notification: Performance of NFFlatten.resolveConnections: time 0.0003636/0.04381, allocations: 273.1 kB / 385.3 MB, free: 3.984 MB / 314.7 MB Notification: Performance of NFEvalConstants.evaluate: time 0.0004822/0.04429, allocations: 482.9 kB / 385.8 MB, free: 3.512 MB / 314.7 MB Notification: Performance of NFSimplifyModel.simplify: time 0.0004463/0.04474, allocations: 307.1 kB / 386.1 MB, free: 3.211 MB / 314.7 MB Notification: Performance of NFPackage.collectConstants: time 4.069e-05/0.04478, allocations: 40 kB / 386.1 MB, free: 3.172 MB / 314.7 MB Notification: Performance of NFFlatten.collectFunctions: time 0.007543/0.05232, allocations: 5.907 MB / 392 MB, free: 13.26 MB / 330.7 MB Notification: Performance of NFScalarize.scalarize: time 9.738e-05/0.05242, allocations: 99.59 kB / 392.1 MB, free: 13.16 MB / 330.7 MB Notification: Performance of NFVerifyModel.verify: time 0.0001534/0.05257, allocations: 203.5 kB / 392.3 MB, free: 12.96 MB / 330.7 MB Notification: Performance of NFConvertDAE.convert: time 0.006033/0.05861, allocations: 4.626 MB / 396.9 MB, free: 8.324 MB / 330.7 MB Notification: Performance of FrontEnd - DAE generated: time 4.999e-06/0.05861, allocations: 0 / 396.9 MB, free: 8.324 MB / 330.7 MB Notification: Performance of FrontEnd: time 1.983e-06/0.05861, allocations: 3.938 kB / 396.9 MB, free: 8.32 MB / 330.7 MB Notification: Performance of Transformations before backend: time 6.372e-06/0.05862, allocations: 0 / 396.9 MB, free: 8.32 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: 99 * Number of variables: 99 Notification: Performance of Generate backend data structure: time 0.001944/0.06056, allocations: 1.276 MB / 398.2 MB, free: 7.004 MB / 330.7 MB Notification: Performance of prepare preOptimizeDAE: time 4.553e-05/0.06061, allocations: 12.03 kB / 398.2 MB, free: 6.992 MB / 330.7 MB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.0003435/0.06095, allocations: 164.4 kB / 398.4 MB, free: 6.832 MB / 330.7 MB Notification: Performance of preOpt evaluateParameters (simulation): time 0.0003557/0.06131, allocations: 330.8 kB / 398.7 MB, free: 6.48 MB / 330.7 MB Notification: Performance of preOpt simplifyIfEquations (simulation): time 2.946e-05/0.06134, allocations: 33.38 kB / 398.8 MB, free: 6.445 MB / 330.7 MB Notification: Performance of preOpt expandDerOperator (simulation): time 5.226e-05/0.06139, allocations: 44.38 kB / 398.8 MB, free: 6.402 MB / 330.7 MB Notification: Performance of preOpt clockPartitioning (simulation): time 0.0008978/0.06229, allocations: 0.6311 MB / 399.4 MB, free: 5.715 MB / 330.7 MB Notification: Performance of preOpt findStateOrder (simulation): time 1.465e-05/0.0623, allocations: 3.938 kB / 399.4 MB, free: 5.711 MB / 330.7 MB Notification: Performance of preOpt replaceEdgeChange (simulation): time 3.249e-05/0.06234, allocations: 20 kB / 399.4 MB, free: 5.691 MB / 330.7 MB Notification: Performance of preOpt inlineArrayEqn (simulation): time 1.076e-05/0.06235, allocations: 16 kB / 399.5 MB, free: 5.676 MB / 330.7 MB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.0005848/0.06293, allocations: 358.5 kB / 399.8 MB, free: 5.328 MB / 330.7 MB Warning: The model contains alias variables with redundant start and/or conflicting nominal values. It is recommended to resolve the conflicts, because otherwise the system could be hard to solve. To print the conflicting alias sets and the chosen candidates please use -d=aliasConflicts. Notification: Performance of preOpt removeSimpleEquations (simulation): time 0.001281/0.06421, allocations: 1.541 MB / 401.4 MB, free: 3.73 MB / 330.7 MB Notification: Performance of preOpt comSubExp (simulation): time 0.0006149/0.06483, allocations: 398.9 kB / 401.7 MB, free: 3.328 MB / 330.7 MB Notification: Performance of preOpt resolveLoops (simulation): time 7.925e-05/0.06491, allocations: 71.64 kB / 401.8 MB, free: 3.254 MB / 330.7 MB Notification: Performance of preOpt evalFunc (simulation): time 0.02481/0.08972, allocations: 14.7 MB / 416.5 MB, free: 4.543 MB / 346.7 MB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 4.684e-05/0.08976, allocations: 41.39 kB / 416.6 MB, free: 4.492 MB / 346.7 MB Notification: Performance of pre-optimization done (n=28): time 3.096e-06/0.08976, allocations: 7.938 kB / 416.6 MB, free: 4.484 MB / 346.7 MB Notification: Performance of matching and sorting (n=31): time 0.00329/0.09305, allocations: 1.721 MB / 418.3 MB, free: 2.719 MB / 346.7 MB Notification: Performance of inlineWhenForInitialization (initialization): time 5.802e-05/0.09311, allocations: 106.8 kB / 418.4 MB, free: 2.59 MB / 346.7 MB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.0005241/0.09364, allocations: 338.6 kB / 418.7 MB, free: 2.238 MB / 346.7 MB Notification: Performance of collectPreVariables (initialization): time 2.754e-05/0.09366, allocations: 33.7 kB / 418.7 MB, free: 2.199 MB / 346.7 MB Notification: Performance of collectInitialEqns (initialization): time 0.0001454/0.09381, allocations: 299.2 kB / 419 MB, free: 1.898 MB / 346.7 MB Notification: Performance of collectInitialBindings (initialization): time 7.018e-05/0.09388, allocations: 123 kB / 419.2 MB, free: 1.777 MB / 346.7 MB Notification: Performance of simplifyInitialFunctions (initialization): time 0.0001095/0.09399, allocations: 99.28 kB / 419.3 MB, free: 1.672 MB / 346.7 MB Notification: Performance of setup shared object (initialization): time 0.0001376/0.09413, allocations: 0.5234 MB / 419.8 MB, free: 1.137 MB / 346.7 MB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0001362/0.09426, allocations: 127.6 kB / 419.9 MB, free: 1.008 MB / 346.7 MB Notification: Performance of partitionIndependentBlocks (initialization): time 0.000183/0.09445, allocations: 264.5 kB / 420.2 MB, free: 0.7031 MB / 346.7 MB Notification: Performance of analyzeInitialSystem (initialization): time 0.000294/0.09474, allocations: 333.8 kB / 420.5 MB, free: 360 kB / 346.7 MB Notification: Performance of solveInitialSystemEqSystem (initialization): time 1.893e-06/0.09474, allocations: 0 / 420.5 MB, free: 360 kB / 346.7 MB Notification: Performance of matching and sorting (n=41) (initialization): time 0.0009266/0.09567, allocations: 0.6717 MB / 421.2 MB, free: 15.67 MB / 362.7 MB Notification: Performance of prepare postOptimizeDAE: time 1.862e-05/0.09569, allocations: 10.81 kB / 421.2 MB, free: 15.66 MB / 362.7 MB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 6.342e-06/0.09569, allocations: 0 / 421.2 MB, free: 15.66 MB / 362.7 MB Notification: Performance of postOpt tearingSystem (initialization): time 0.001117/0.09681, allocations: 0.5265 MB / 421.7 MB, free: 15.13 MB / 362.7 MB Notification: Performance of postOpt solveSimpleEquations (initialization): time 8.847e-05/0.0969, allocations: 31.98 kB / 421.7 MB, free: 15.1 MB / 362.7 MB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.0009198/0.09782, allocations: 1.194 MB / 422.9 MB, free: 13.87 MB / 362.7 MB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0001329/0.09795, allocations: 8 kB / 422.9 MB, free: 13.86 MB / 362.7 MB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 3.272e-05/0.09798, allocations: 23.97 kB / 423 MB, free: 13.84 MB / 362.7 MB Notification: Performance of preBalanceInitialSystem (initialization_lambda0): time 0.0002026/0.09819, allocations: 250.6 kB / 423.2 MB, free: 13.59 MB / 362.7 MB Notification: Performance of partitionIndependentBlocks (initialization_lambda0): time 0.0001888/0.09838, allocations: 272.4 kB / 423.5 MB, free: 13.27 MB / 362.7 MB Notification: Performance of analyzeInitialSystem (initialization_lambda0): time 0.0002885/0.09866, allocations: 329.7 kB / 423.8 MB, free: 12.92 MB / 362.7 MB Notification: Performance of solveInitialSystemEqSystem (initialization_lambda0): time 1.282e-06/0.09867, allocations: 0 / 423.8 MB, free: 12.92 MB / 362.7 MB Notification: Performance of matching and sorting (n=41) (initialization_lambda0): time 0.0007722/0.09944, allocations: 0.6291 MB / 424.4 MB, free: 12.28 MB / 362.7 MB Notification: Performance of prepare postOptimizeDAE: time 8.055e-06/0.09945, allocations: 4 kB / 424.4 MB, free: 12.28 MB / 362.7 MB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 3.717e-06/0.09945, allocations: 4 kB / 424.4 MB, free: 12.27 MB / 362.7 MB Notification: Performance of postOpt tearingSystem (initialization): time 0.000726/0.1002, allocations: 467.4 kB / 424.9 MB, free: 11.81 MB / 362.7 MB Notification: Performance of postOpt solveSimpleEquations (initialization): time 8.218e-05/0.1003, allocations: 39.92 kB / 424.9 MB, free: 11.77 MB / 362.7 MB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.001214/0.1015, allocations: 1.139 MB / 426.1 MB, free: 10.6 MB / 362.7 MB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0001015/0.1016, allocations: 11.98 kB / 426.1 MB, free: 10.59 MB / 362.7 MB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 2.588e-05/0.1016, allocations: 27.98 kB / 426.1 MB, free: 10.56 MB / 362.7 MB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 6 * Number of states: 0 () * Number of discrete variables: 3 (Mixer1.fluidState.phase,PressDrop1.state.phase,Header1.fluidState.phase) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (20): * Single equations (assignments): 19 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 0 * Torn equation systems: 1 * Mixed (continuous/discrete) equation systems: 0 Notification: Torn system details for strict tearing set: * Linear torn systems (#iteration vars, #inner vars, density): 0 systems * Non-linear torn systems (#iteration vars, #inner vars): 1 system {(5,17)} Notification: Performance of prepare postOptimizeDAE: time 0.0001461/0.1017, allocations: 284 kB / 426.4 MB, free: 10.28 MB / 362.7 MB Notification: Performance of postOpt lateInlineFunction (simulation): time 6.807e-05/0.1018, allocations: 47.77 kB / 426.4 MB, free: 10.23 MB / 362.7 MB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.001442/0.1033, allocations: 1.64 MB / 428.1 MB, free: 8.574 MB / 362.7 MB Notification: Performance of postOpt inlineArrayEqn (simulation): time 1.003e-05/0.1033, allocations: 11.98 kB / 428.1 MB, free: 8.562 MB / 362.7 MB Notification: Performance of postOpt constantLinearSystem (simulation): time 3.767e-06/0.1033, allocations: 4 kB / 428.1 MB, free: 8.559 MB / 362.7 MB Notification: Performance of postOpt simplifysemiLinear (simulation): time 4.118e-06/0.1033, allocations: 0 / 428.1 MB, free: 8.559 MB / 362.7 MB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.002045/0.1053, allocations: 2.508 MB / 430.6 MB, free: 5.941 MB / 362.7 MB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 4.498e-06/0.1053, allocations: 0 / 430.6 MB, free: 5.941 MB / 362.7 MB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0002613/0.1056, allocations: 75.94 kB / 430.7 MB, free: 5.867 MB / 362.7 MB Notification: Performance of postOpt tearingSystem (simulation): time 0.0008886/0.1065, allocations: 310.7 kB / 431 MB, free: 5.555 MB / 362.7 MB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 1.83e-05/0.1065, allocations: 8 kB / 431 MB, free: 5.547 MB / 362.7 MB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.00185/0.1083, allocations: 2.673 MB / 433.6 MB, free: 2.727 MB / 362.7 MB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 1.583e-06/0.1083, allocations: 4 kB / 433.6 MB, free: 2.723 MB / 362.7 MB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.001642/0.11, allocations: 2.141 MB / 435.8 MB, free: 0.5547 MB / 362.7 MB Notification: Performance of postOpt removeConstants (simulation): time 3.353e-05/0.11, allocations: 43.75 kB / 435.8 MB, free: 0.5117 MB / 362.7 MB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 3.22e-05/0.11, allocations: 15.97 kB / 435.8 MB, free: 0.4961 MB / 362.7 MB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0001149/0.1102, allocations: 15.98 kB / 435.9 MB, free: 492 kB / 362.7 MB Notification: Performance of postOpt findZeroCrossings (simulation): time 6.974e-05/0.1102, allocations: 31.94 kB / 435.9 MB, free: 460 kB / 362.7 MB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 1.558e-05/0.1102, allocations: 7.984 kB / 435.9 MB, free: 452 kB / 362.7 MB Notification: Performance of sorting global known variables: time 0.0001034/0.1104, allocations: 227 kB / 436.1 MB, free: 228 kB / 362.7 MB Notification: Performance of sort global known variables: time 6e-08/0.1104, allocations: 0 / 436.1 MB, free: 228 kB / 362.7 MB Notification: Performance of remove unused functions: time 0.002332/0.1127, allocations: 0.9673 MB / 437.1 MB, free: 15.25 MB / 378.7 MB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 1 * Number of states: 4 (Mixer1.p,Mixer1.h,Header1.p,Header1.h) * Number of discrete variables: 4 ($cse2.phase,$cse2.region,$cse3.phase,$cse3.region) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for simulation (32): * Single equations (assignments): 27 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 2 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 2 * Torn equation systems: 1 * Mixed (continuous/discrete) equation systems: 0 Notification: Equation system details (not torn): * Constant Jacobian (size): 0 systems * Linear Jacobian (size,density): 1 system {(2,100.0%)} * Non-linear Jacobian (size): 1 system {1} * Without analytic Jacobian (size): 0 systems Notification: Torn system details for strict tearing set: * Linear torn systems (#iteration vars, #inner vars, density): 1 system {(1,1,100.0%)} * Non-linear torn systems (#iteration vars, #inner vars): 0 systems Notification: Performance of Backend phase and start with SimCode phase: time 0.002387/0.1151, allocations: 1.095 MB / 438.2 MB, free: 14.14 MB / 378.7 MB Notification: Performance of simCode: created initialization part: time 0.001042/0.1161, allocations: 0.6272 MB / 438.8 MB, free: 13.51 MB / 378.7 MB Notification: Performance of simCode: created event and clocks part: time 2.144e-06/0.1161, allocations: 0 / 438.8 MB, free: 13.51 MB / 378.7 MB Error: Internal error BackendDAEUtil.equationToExp failed: $DER.Mixer1.fluidState.d = Modelica.Media.Water.IF97_Utilities.rho_ph_der(Mixer1.p, Mixer1.h, $cse3, $DER.Mixer1.p, $DER.Mixer1.h) Notification: Performance of simCode: created simulation system equations: time 0.0006899/0.1168, allocations: 439.6 kB / 439.2 MB, free: 13.05 MB / 378.7 MB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.0006336/0.1174, allocations: 205.2 kB / 439.4 MB, free: 12.85 MB / 378.7 MB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.001994/0.1194, allocations: 1.081 MB / 440.5 MB, free: 11.74 MB / 378.7 MB Notification: Performance of simCode: some other stuff during SimCode phase: time 8.348e-05/0.1195, allocations: 122.8 kB / 440.6 MB, free: 11.61 MB / 378.7 MB Notification: Performance of simCode: alias equations: time 0.0001767/0.1197, allocations: 98.8 kB / 440.7 MB, free: 11.51 MB / 378.7 MB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0002284/0.1199, allocations: 194.1 kB / 440.9 MB, free: 11.32 MB / 378.7 MB Notification: Performance of SimCode: time 9.32e-07/0.1199, allocations: 0 / 440.9 MB, free: 11.32 MB / 378.7 MB Notification: Performance of Templates: time 0.1726/0.2926, allocations: 45.45 MB / 486.4 MB, free: 64.66 MB / 378.7 MB " [Timeout remaining time 660] make -j1 -f ThermoPower_ThermoPower.Test.WaterComponents.TestMixerSlowFast.makefile [Timeout 660] (rm -f ThermoPower_ThermoPower.Test.WaterComponents.TestMixerSlowFast.pipe ; mkfifo ThermoPower_ThermoPower.Test.WaterComponents.TestMixerSlowFast.pipe ; head -c 1048576 < ThermoPower_ThermoPower.Test.WaterComponents.TestMixerSlowFast.pipe >> ../files/ThermoPower_ThermoPower.Test.WaterComponents.TestMixerSlowFast.sim & ./ThermoPower_ThermoPower.Test.WaterComponents.TestMixerSlowFast -abortSlowSimulation -alarm=240 -lv LOG_STATS > ThermoPower_ThermoPower.Test.WaterComponents.TestMixerSlowFast.pipe 2>&1) [Timeout 240] [Calling sys.exit(0), Time elapsed: 4.491967870853841]