Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr Buildings_11_Buildings.HeatTransfer.Windows.Examples.Overhang.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 0.001362/0.001362, allocations: 108.2 kB / 16.45 MB, free: 6.508 MB / 14.72 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 0.001592/0.001592, allocations: 213.7 kB / 19.43 MB, free: 3.648 MB / 14.72 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 1.594/1.594, allocations: 230.6 MB / 252.8 MB, free: 9.109 MB / 206.1 MB " [Timeout remaining time 178] loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 11.1.1-maint.11.x/package.mo", uses=false) [Timeout 180] "Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 11.1.1-maint.11.x/package.mo): time 2.976/2.976, allocations: 476.7 MB / 0.7672 GB, free: 5.16 MB / 0.6231 GB " [Timeout remaining time 176] Using package Buildings with version 11.1.1 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 11.1.1-maint.11.x/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: "" <> buildModelFMU(Buildings.HeatTransfer.Windows.Examples.Overhang,fileNamePrefix="Buildings_11_Buildings_HeatTransfer_Windows_Examples_Overhang",fmuType="me",version="2.0",platforms={"static"}) "" <> buildModelFMU(Buildings.HeatTransfer.Windows.Examples.Overhang,fileNamePrefix="Buildings_11_Buildings_HeatTransfer_Windows_Examples_Overhang",fmuType="me",version="2.0",platforms={"static"}) [Timeout 300] "Notification: Buildings requested package Modelica of version 4.0.0. Modelica 4.1.0 is used instead which states that it is fully compatible without conversion script needed. Notification: Performance of FrontEnd - loaded program: time 0.003364/0.003364, allocations: 71.86 kB / 1.112 GB, free: 1.5 MB / 0.9044 GB Notification: Performance of FrontEnd - Absyn->SCode: time 1.062/1.065, allocations: 169.9 MB / 1.278 GB, free: 13.39 MB / 0.9825 GB Notification: Performance of NFInst.instantiate(Buildings.HeatTransfer.Windows.Examples.Overhang): time 0.00989/1.075, allocations: 6.632 MB / 1.285 GB, free: 6.734 MB / 0.9825 GB Notification: Performance of NFInst.instExpressions: time 0.2127/1.288, allocations: 155.4 MB / 1.436 GB, free: 10.71 MB / 1.139 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.001601/1.29, allocations: 31.69 kB / 1.437 GB, free: 10.68 MB / 1.139 GB Notification: Performance of NFTyping.typeComponents: time 0.001123/1.291, allocations: 245.6 kB / 1.437 GB, free: 10.44 MB / 1.139 GB Notification: Performance of NFTyping.typeBindings: time 0.003547/1.294, allocations: 0.7246 MB / 1.437 GB, free: 9.711 MB / 1.139 GB Notification: Performance of NFTyping.typeClassSections: time 0.003665/1.298, allocations: 1.06 MB / 1.439 GB, free: 8.656 MB / 1.139 GB Notification: Performance of NFFlatten.flatten: time 0.003892/1.302, allocations: 2.169 MB / 1.441 GB, free: 6.48 MB / 1.139 GB Notification: Performance of NFFlatten.resolveConnections: time 0.00169/1.304, allocations: 0.6449 MB / 1.441 GB, free: 5.805 MB / 1.139 GB Notification: Performance of NFEvalConstants.evaluate: time 0.001967/1.305, allocations: 0.8217 MB / 1.442 GB, free: 4.98 MB / 1.139 GB Notification: Performance of NFSimplifyModel.simplify: time 0.001945/1.307, allocations: 0.8677 MB / 1.443 GB, free: 4.109 MB / 1.139 GB Notification: Performance of NFPackage.collectConstants: time 0.0007291/1.308, allocations: 212 kB / 1.443 GB, free: 3.902 MB / 1.139 GB Notification: Performance of NFFlatten.collectFunctions: time 0.002299/1.31, allocations: 0.7455 MB / 1.444 GB, free: 3.156 MB / 1.139 GB Notification: Performance of NFScalarize.scalarize: time 0.0009012/1.311, allocations: 0.4907 MB / 1.444 GB, free: 2.664 MB / 1.139 GB Notification: Performance of NFVerifyModel.verify: time 0.001994/1.313, allocations: 0.9021 MB / 1.445 GB, free: 1.758 MB / 1.139 GB Notification: Performance of NFConvertDAE.convert: time 0.005205/1.319, allocations: 2.693 MB / 1.448 GB, free: 15.05 MB / 1.154 GB Notification: Performance of FrontEnd - DAE generated: time 5.46e-06/1.319, allocations: 0 / 1.448 GB, free: 15.05 MB / 1.154 GB Notification: Performance of FrontEnd: time 1.543e-06/1.319, allocations: 0 / 1.448 GB, free: 15.05 MB / 1.154 GB Notification: Performance of Transformations before backend: time 5.194e-05/1.319, allocations: 0 / 1.448 GB, free: 15.05 MB / 1.154 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 350 * Number of variables: 350 Notification: Performance of Generate backend data structure: time 0.004831/1.323, allocations: 2.05 MB / 1.45 GB, free: 12.95 MB / 1.154 GB Notification: Performance of prepare preOptimizeDAE: time 4.681e-05/1.323, allocations: 8.031 kB / 1.45 GB, free: 12.94 MB / 1.154 GB Notification: Performance of preOpt introduceOutputAliases (simulation): time 0.0002987/1.324, allocations: 207 kB / 1.45 GB, free: 12.73 MB / 1.154 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.1202/1.444, allocations: 15.5 MB / 1.465 GB, free: 13.2 MB / 1.17 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.003904/1.448, allocations: 1.43 MB / 1.467 GB, free: 11.73 MB / 1.17 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.000152/1.448, allocations: 102.8 kB / 1.467 GB, free: 11.62 MB / 1.17 GB Notification: Performance of preOpt expandDerOperator (simulation): time 0.0008658/1.449, allocations: 136 kB / 1.467 GB, free: 11.49 MB / 1.17 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.0398/1.489, allocations: 8.045 MB / 1.475 GB, free: 3.379 MB / 1.17 GB Notification: Performance of preOpt findStateOrder (simulation): time 2.748e-05/1.489, allocations: 0 / 1.475 GB, free: 3.379 MB / 1.17 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.0003599/1.489, allocations: 60 kB / 1.475 GB, free: 3.32 MB / 1.17 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 3.712e-05/1.489, allocations: 36 kB / 1.475 GB, free: 3.285 MB / 1.17 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.07544/1.565, allocations: 14.14 MB / 1.489 GB, free: 5.125 MB / 1.186 GB 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 0.05262/1.617, allocations: 11.49 MB / 1.5 GB, free: 9.457 MB / 1.201 GB Notification: Performance of preOpt comSubExp (simulation): time 0.04527/1.663, allocations: 8.218 MB / 1.508 GB, free: 1.23 MB / 1.201 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.03616/1.699, allocations: 6.455 MB / 1.514 GB, free: 10.76 MB / 1.217 GB Notification: Performance of preOpt evalFunc (simulation): time 0.0006929/1.699, allocations: 0.5983 MB / 1.515 GB, free: 10.03 MB / 1.217 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 0.03798/1.737, allocations: 7.06 MB / 1.522 GB, free: 2.949 MB / 1.217 GB Notification: Performance of pre-optimization done (n=115): time 5.26e-06/1.737, allocations: 0 / 1.522 GB, free: 2.949 MB / 1.217 GB Notification: Performance of matching and sorting (n=115): time 0.1099/1.847, allocations: 18.95 MB / 1.54 GB, free: 15.94 MB / 1.248 GB Notification: Performance of inlineWhenForInitialization (initialization): time 0.0001918/1.847, allocations: 196.9 kB / 1.54 GB, free: 15.71 MB / 1.248 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.001695/1.849, allocations: 0.8375 MB / 1.541 GB, free: 14.86 MB / 1.248 GB Notification: Performance of collectPreVariables (initialization): time 0.0006731/1.85, allocations: 49.7 kB / 1.541 GB, free: 14.8 MB / 1.248 GB Notification: Performance of collectInitialEqns (initialization): time 0.0006368/1.85, allocations: 0.5599 MB / 1.542 GB, free: 14.23 MB / 1.248 GB Notification: Performance of collectInitialBindings (initialization): time 0.001024/1.851, allocations: 400.6 kB / 1.542 GB, free: 13.84 MB / 1.248 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.001671/1.853, allocations: 358.5 kB / 1.542 GB, free: 13.48 MB / 1.248 GB Notification: Performance of setup shared object (initialization): time 0.00019/1.853, allocations: 345.9 kB / 1.543 GB, free: 13.14 MB / 1.248 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0359/1.889, allocations: 6.549 MB / 1.549 GB, free: 6.582 MB / 1.248 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.03638/1.926, allocations: 6.702 MB / 1.556 GB, free: 15.84 MB / 1.264 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.06687/1.992, allocations: 11.2 MB / 1.567 GB, free: 4.605 MB / 1.264 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 1.261e-05/1.992, allocations: 4 kB / 1.567 GB, free: 4.602 MB / 1.264 GB Notification: Performance of matching and sorting (n=136) (initialization): time 0.07326/2.066, allocations: 12.63 MB / 1.579 GB, free: 7.949 MB / 1.279 GB Notification: Performance of prepare postOptimizeDAE: time 3.305e-05/2.066, allocations: 4 kB / 1.579 GB, free: 7.945 MB / 1.279 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.23e-05/2.066, allocations: 4 kB / 1.579 GB, free: 7.941 MB / 1.279 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.000695/2.066, allocations: 96.64 kB / 1.579 GB, free: 7.844 MB / 1.279 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.02005/2.087, allocations: 2.667 MB / 1.582 GB, free: 5.172 MB / 1.279 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.002703/2.089, allocations: 1.638 MB / 1.583 GB, free: 3.391 MB / 1.279 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.01999/2.109, allocations: 2.456 MB / 1.586 GB, free: 0.9297 MB / 1.279 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.000813/2.11, allocations: 111.7 kB / 1.586 GB, free: 0.8203 MB / 1.279 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 4 * Number of states: 0 () * Number of discrete variables: 19 (ove.ove.solAzi.outsidePolarCircle,HDirTil.incAng.decAng.tNext,$PRE.HDirTil.incAng.decAng.tNext,weaDat.decAng.tNext,$PRE.weaDat.decAng.tNext,weaDat.eqnTim.tNext,$PRE.weaDat.eqnTim.tNext,weaDat.conTim.tNext,$PRE.weaDat.conTim.tNext,weaDat.conTimMin.tNext,$PRE.weaDat.conTimMin.tNext,weaDat.locTim.tNext,$PRE.weaDat.locTim.tNext,$whenCondition1,$whenCondition2,$whenCondition3,$whenCondition4,$whenCondition5,$whenCondition6) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (134): * Single equations (assignments): 133 * 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 {(1,2)} Notification: Performance of prepare postOptimizeDAE: time 0.00191/2.112, allocations: 347.2 kB / 1.586 GB, free: 484 kB / 1.279 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0009738/2.113, allocations: 115.2 kB / 1.586 GB, free: 368 kB / 1.279 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.07699/2.19, allocations: 13.2 MB / 1.599 GB, free: 3.129 MB / 1.295 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 2.344e-05/2.19, allocations: 12 kB / 1.599 GB, free: 3.117 MB / 1.295 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 1.061e-05/2.19, allocations: 3.938 kB / 1.599 GB, free: 3.113 MB / 1.295 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 3.907e-05/2.19, allocations: 7.969 kB / 1.599 GB, free: 3.105 MB / 1.295 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.004301/2.194, allocations: 2.477 MB / 1.602 GB, free: 0.582 MB / 1.295 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 1.34e-05/2.194, allocations: 0 / 1.602 GB, free: 0.582 MB / 1.295 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.813/3.007, allocations: 2.652 MB / 1.604 GB, free: 321.4 MB / 1.295 GB Notification: Performance of postOpt tearingSystem (simulation): time 0.0005929/3.008, allocations: 75 kB / 1.604 GB, free: 321.4 MB / 1.295 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 0.0007836/3.009, allocations: 93.86 kB / 1.604 GB, free: 321.4 MB / 1.295 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.002074/3.011, allocations: 1.674 MB / 1.606 GB, free: 320.1 MB / 1.295 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 2.946e-06/3.011, allocations: 4.469 kB / 1.606 GB, free: 320.1 MB / 1.295 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.07585/3.087, allocations: 12.57 MB / 1.618 GB, free: 318.5 MB / 1.295 GB Notification: Performance of postOpt removeConstants (simulation): time 0.002118/3.089, allocations: 0.8116 MB / 1.619 GB, free: 318.1 MB / 1.295 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0006936/3.089, allocations: 30.22 kB / 1.619 GB, free: 318.1 MB / 1.295 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.01876/3.108, allocations: 2.405 MB / 1.621 GB, free: 316.9 MB / 1.295 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0002659/3.108, allocations: 98.05 kB / 1.621 GB, free: 316.9 MB / 1.295 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 0.0005187/3.109, allocations: 107 kB / 1.622 GB, free: 316.8 MB / 1.295 GB Notification: Performance of sorting global known variables: time 0.0008454/3.11, allocations: 0.5979 MB / 1.622 GB, free: 316.4 MB / 1.295 GB Notification: Performance of sort global known variables: time 8e-08/3.11, allocations: 0 / 1.622 GB, free: 316.4 MB / 1.295 GB Notification: Performance of remove unused functions: time 0.002383/3.112, allocations: 0.7574 MB / 1.623 GB, free: 316.4 MB / 1.295 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 1 * Number of states: 0 () * Number of discrete variables: 12 ($whenCondition6,$whenCondition5,$whenCondition4,$whenCondition3,$whenCondition2,$whenCondition1,weaDat.locTim.tNext,weaDat.conTimMin.tNext,weaDat.conTim.tNext,weaDat.eqnTim.tNext,weaDat.decAng.tNext,HDirTil.incAng.decAng.tNext) * Number of discrete states: 6 (weaDat.locTim.tNext,weaDat.conTimMin.tNext,weaDat.conTim.tNext,weaDat.eqnTim.tNext,weaDat.decAng.tNext,HDirTil.incAng.decAng.tNext) * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for simulation (136): * Single equations (assignments): 129 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 6 * 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 {(1,3)} Notification: Performance of Backend phase and start with SimCode phase: time 0.07181/3.184, allocations: 13.68 MB / 1.636 GB, free: 305.7 MB / 1.295 GB Notification: Performance of simCode: created initialization part: time 0.07091/3.255, allocations: 13.38 MB / 1.649 GB, free: 292.2 MB / 1.295 GB Notification: Performance of simCode: created event and clocks part: time 7.384e-06/3.255, allocations: 0 / 1.649 GB, free: 292.2 MB / 1.295 GB Notification: Performance of simCode: created simulation system equations: time 0.03536/3.29, allocations: 6.762 MB / 1.656 GB, free: 285.5 MB / 1.295 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.002228/3.293, allocations: 349.9 kB / 1.656 GB, free: 285.1 MB / 1.295 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.2174/3.51, allocations: 45.42 MB / 1.701 GB, free: 239.6 MB / 1.295 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0009428/3.511, allocations: 1.197 MB / 1.702 GB, free: 238.3 MB / 1.295 GB Notification: Performance of simCode: alias equations: time 0.003879/3.515, allocations: 0.7434 MB / 1.702 GB, free: 237.6 MB / 1.295 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.002201/3.517, allocations: 0.6786 MB / 1.703 GB, free: 236.9 MB / 1.295 GB Notification: Performance of SimCode: time 1.433e-06/3.517, allocations: 0 / 1.703 GB, free: 236.9 MB / 1.295 GB Notification: Performance of buildModelFMU: Generate the FMI files: time 0.09861/3.616, allocations: 50.99 MB / 1.753 GB, free: 186.1 MB / 1.295 GB Notification: Performance of buildModelFMU: Generate platform static: time 15.09/18.71, allocations: 21.8 kB / 1.753 GB, free: 186.1 MB / 1.295 GB " [Timeout remaining time 281] (rm -f Buildings_11_Buildings.HeatTransfer.Windows.Examples.Overhang.pipe ; mkfifo Buildings_11_Buildings.HeatTransfer.Windows.Examples.Overhang.pipe ; head -c 1048576 < Buildings_11_Buildings.HeatTransfer.Windows.Examples.Overhang.pipe >> ../files/Buildings_11_Buildings.HeatTransfer.Windows.Examples.Overhang.sim & python3 -m fmpy simulate --output-file Buildings_11_Buildings.HeatTransfer.Windows.Examples.Overhang_res.csv --start-time 0 --stop-time 86400 --timeout 400 --relative-tolerance 1e-06 --interface-type ModelExchange --solver CVode --output-interval 34.56 Buildings_11_Buildings_HeatTransfer_Windows_Examples_Overhang.fmu > Buildings_11_Buildings.HeatTransfer.Windows.Examples.Overhang.pipe 2>&1) [Timeout 420.0] diffSimulationResults("Buildings_11_Buildings.HeatTransfer.Windows.Examples.Overhang_res.csv","/mnt/ReferenceFiles/Buildings/csv/maint_11.x/Buildings_HeatTransfer_Windows_Examples_Overhang.csv","/var/lib/jenkins1/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/files/Buildings_11_Buildings.HeatTransfer.Windows.Examples.Overhang.diff",relTol=0.003,relTolDiffMinMax=0.003,rangeDelta=0.001) [Timeout 300] "Error: Could not read variable ove.fraSun in file Buildings_11_Buildings.HeatTransfer.Windows.Examples.Overhang_res.csv. Warning: Get data of variable ove.fraSun from file Buildings_11_Buildings.HeatTransfer.Windows.Examples.Overhang_res.csv failed! Error: Could not read variable ove.HDirTilUns in file Buildings_11_Buildings.HeatTransfer.Windows.Examples.Overhang_res.csv. Warning: Get data of variable ove.HDirTilUns from file Buildings_11_Buildings.HeatTransfer.Windows.Examples.Overhang_res.csv failed! Error: Could not read variable ove.HDirTil in file Buildings_11_Buildings.HeatTransfer.Windows.Examples.Overhang_res.csv. Warning: Get data of variable ove.HDirTil from file Buildings_11_Buildings.HeatTransfer.Windows.Examples.Overhang_res.csv failed! " [Timeout remaining time 300] Reference file matches [Calling sys.exit(0), Time elapsed: 25.61628876812756]