Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr Buildings_12_Buildings.Fluid.SolarCollectors.Controls.Examples.SolarPumpController.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 0.001216/0.001216, allocations: 103.6 kB / 18.95 MB, free: 2.66 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 0.001357/0.001357, allocations: 216.4 kB / 22.24 MB, free: 5.258 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 1.342/1.342, allocations: 230.6 MB / 256 MB, free: 7.816 MB / 206.1 MB " [Timeout remaining time 179] loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 12.1.1-maint.12.x/package.mo", uses=false) [Timeout 180] "Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 12.1.1-maint.12.x/package.mo): time 2.951/2.951, allocations: 0.49 GB / 0.7951 GB, free: 35.38 MB / 0.6231 GB " [Timeout remaining time 177] Using package Buildings with version 12.1.1 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 12.1.1-maint.12.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.Fluid.SolarCollectors.Controls.Examples.SolarPumpController,fileNamePrefix="Buildings_12_Buildings_Fluid_SolarCollectors_Controls_Examples_SolarPumpController",fmuType="me",version="2.0",platforms={"static"}) "" <> buildModelFMU(Buildings.Fluid.SolarCollectors.Controls.Examples.SolarPumpController,fileNamePrefix="Buildings_12_Buildings_Fluid_SolarCollectors_Controls_Examples_SolarPumpController",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 0.001886/0.001886, allocations: 66.11 kB / 1.154 GB, free: 25.57 MB / 0.9044 GB Notification: Performance of FrontEnd - Absyn->SCode: time 0.2976/0.2995, allocations: 176.1 MB / 1.326 GB, free: 1.504 MB / 1.014 GB Notification: Performance of NFInst.instantiate(Buildings.Fluid.SolarCollectors.Controls.Examples.SolarPumpController): time 0.008941/0.3085, allocations: 6.553 MB / 1.332 GB, free: 10.92 MB / 1.029 GB Notification: Performance of NFInst.instExpressions: time 0.1606/0.4691, allocations: 133.8 MB / 1.463 GB, free: 4.602 MB / 1.154 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.001272/0.4703, allocations: 27.81 kB / 1.463 GB, free: 4.574 MB / 1.154 GB Notification: Performance of NFTyping.typeComponents: time 0.001567/0.4719, allocations: 436.7 kB / 1.463 GB, free: 4.145 MB / 1.154 GB Notification: Performance of NFTyping.typeBindings: time 0.002337/0.4742, allocations: 0.7726 MB / 1.464 GB, free: 3.371 MB / 1.154 GB Notification: Performance of NFTyping.typeClassSections: time 0.002388/0.4766, allocations: 1.158 MB / 1.465 GB, free: 2.219 MB / 1.154 GB Notification: Performance of NFFlatten.flatten: time 0.003003/0.4796, allocations: 2.482 MB / 1.468 GB, free: 15.73 MB / 1.17 GB Notification: Performance of NFFlatten.resolveConnections: time 0.001197/0.4808, allocations: 0.7784 MB / 1.468 GB, free: 14.9 MB / 1.17 GB Notification: Performance of NFEvalConstants.evaluate: time 0.001214/0.482, allocations: 0.9423 MB / 1.469 GB, free: 13.95 MB / 1.17 GB Notification: Performance of NFSimplifyModel.simplify: time 0.00143/0.4835, allocations: 1.012 MB / 1.47 GB, free: 12.94 MB / 1.17 GB Notification: Performance of NFPackage.collectConstants: time 0.0004533/0.4839, allocations: 268 kB / 1.471 GB, free: 12.68 MB / 1.17 GB Notification: Performance of NFFlatten.collectFunctions: time 0.001607/0.4855, allocations: 0.6636 MB / 1.471 GB, free: 12.01 MB / 1.17 GB Notification: Performance of NFScalarize.scalarize: time 0.0005821/0.4861, allocations: 0.5764 MB / 1.472 GB, free: 11.43 MB / 1.17 GB Notification: Performance of NFVerifyModel.verify: time 0.0009401/0.487, allocations: 0.8751 MB / 1.473 GB, free: 10.55 MB / 1.17 GB Notification: Performance of NFConvertDAE.convert: time 0.003731/0.4908, allocations: 3.235 MB / 1.476 GB, free: 7.309 MB / 1.17 GB Notification: Performance of FrontEnd - DAE generated: time 4.108e-06/0.4908, allocations: 0 / 1.476 GB, free: 7.309 MB / 1.17 GB Notification: Performance of FrontEnd: time 1.313e-06/0.4908, allocations: 0 / 1.476 GB, free: 7.309 MB / 1.17 GB Notification: Performance of Transformations before backend: time 3.413e-05/0.4908, allocations: 4 kB / 1.476 GB, free: 7.305 MB / 1.17 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 415 * Number of variables: 415 Notification: Performance of Generate backend data structure: time 0.00474/0.4956, allocations: 2.301 MB / 1.478 GB, free: 4.961 MB / 1.17 GB Notification: Performance of prepare preOptimizeDAE: time 4.444e-05/0.4956, allocations: 12.03 kB / 1.478 GB, free: 4.949 MB / 1.17 GB Notification: Performance of preOpt introduceOutputAliases (simulation): time 0.0002913/0.4959, allocations: 236.7 kB / 1.478 GB, free: 4.707 MB / 1.17 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.007945/0.5038, allocations: 1.01 MB / 1.479 GB, free: 3.695 MB / 1.17 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.002556/0.5064, allocations: 1.081 MB / 1.48 GB, free: 2.578 MB / 1.17 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.0001278/0.5065, allocations: 123.2 kB / 1.48 GB, free: 2.457 MB / 1.17 GB Notification: Performance of preOpt expandDerOperator (simulation): time 0.0002782/0.5068, allocations: 160 kB / 1.481 GB, free: 2.301 MB / 1.17 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.004841/0.5116, allocations: 2.34 MB / 1.483 GB, free: 15.84 MB / 1.186 GB Notification: Performance of preOpt findStateOrder (simulation): time 3.486e-05/0.5117, allocations: 7.938 kB / 1.483 GB, free: 15.83 MB / 1.186 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.0001714/0.5118, allocations: 67.94 kB / 1.483 GB, free: 15.77 MB / 1.186 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 3.636e-05/0.5119, allocations: 40 kB / 1.483 GB, free: 15.73 MB / 1.186 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.005877/0.5178, allocations: 2.393 MB / 1.485 GB, free: 13.33 MB / 1.186 GB Notification: Performance of preOpt removeSimpleEquations (simulation): time 0.009472/0.5272, allocations: 4.642 MB / 1.49 GB, free: 8.609 MB / 1.186 GB Notification: Performance of preOpt comSubExp (simulation): time 0.004136/0.5314, allocations: 1.616 MB / 1.491 GB, free: 6.984 MB / 1.186 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.001896/0.5333, allocations: 0.7252 MB / 1.492 GB, free: 6.258 MB / 1.186 GB Notification: Performance of preOpt evalFunc (simulation): time 0.0005474/0.5338, allocations: 101.2 kB / 1.492 GB, free: 6.16 MB / 1.186 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 0.002509/0.5363, allocations: 1.176 MB / 1.493 GB, free: 4.938 MB / 1.186 GB Notification: Performance of pre-optimization done (n=139): time 3.206e-06/0.5363, allocations: 3.938 kB / 1.493 GB, free: 4.934 MB / 1.186 GB Notification: Performance of matching and sorting (n=139): time 0.007527/0.5439, allocations: 2.544 MB / 1.496 GB, free: 2.383 MB / 1.186 GB Notification: Performance of inlineWhenForInitialization (initialization): time 0.0001398/0.544, allocations: 226.9 kB / 1.496 GB, free: 2.113 MB / 1.186 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.001353/0.5453, allocations: 0.9732 MB / 1.497 GB, free: 1.121 MB / 1.186 GB Notification: Performance of collectPreVariables (initialization): time 0.0001502/0.5455, allocations: 57.69 kB / 1.497 GB, free: 1.059 MB / 1.186 GB Notification: Performance of collectInitialEqns (initialization): time 0.0005958/0.5461, allocations: 0.6734 MB / 1.498 GB, free: 384 kB / 1.186 GB Notification: Performance of collectInitialBindings (initialization): time 0.000452/0.5465, allocations: 468.1 kB / 1.498 GB, free: 15.91 MB / 1.201 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.0004722/0.547, allocations: 254.8 kB / 1.498 GB, free: 15.65 MB / 1.201 GB Notification: Performance of setup shared object (initialization): time 0.0001693/0.5472, allocations: 357.9 kB / 1.499 GB, free: 15.3 MB / 1.201 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.001882/0.5491, allocations: 0.6702 MB / 1.499 GB, free: 14.63 MB / 1.201 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.002085/0.5512, allocations: 0.9704 MB / 1.5 GB, free: 13.59 MB / 1.201 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.00381/0.555, allocations: 1.447 MB / 1.502 GB, free: 12.13 MB / 1.201 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 5.029e-06/0.555, allocations: 4 kB / 1.502 GB, free: 12.12 MB / 1.201 GB Notification: Performance of matching and sorting (n=155) (initialization): time 0.005086/0.5601, allocations: 1.809 MB / 1.504 GB, free: 10.3 MB / 1.201 GB Notification: Performance of prepare postOptimizeDAE: time 2.124e-05/0.5601, allocations: 4 kB / 1.504 GB, free: 10.3 MB / 1.201 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 8.295e-06/0.5601, allocations: 0 / 1.504 GB, free: 10.3 MB / 1.201 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.0006171/0.5607, allocations: 88.78 kB / 1.504 GB, free: 10.21 MB / 1.201 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.001894/0.5626, allocations: 331.5 kB / 1.504 GB, free: 9.887 MB / 1.201 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.00223/0.5648, allocations: 1.545 MB / 1.506 GB, free: 8.223 MB / 1.201 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.001915/0.5667, allocations: 200.5 kB / 1.506 GB, free: 8.027 MB / 1.201 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0001439/0.5669, allocations: 59.94 kB / 1.506 GB, free: 7.969 MB / 1.201 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 5 * Number of states: 0 () * Number of discrete variables: 23 (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,$PRE.weaDat.locTim.tNext,pumCon.hys.y,$PRE.pumCon.hys.y,pumCon.HDirTil.incAng.decAng.tNext,$PRE.pumCon.HDirTil.incAng.decAng.tNext,pumCon.HDifTilIso.incAng.decAng.tNext,$PRE.pumCon.HDifTilIso.incAng.decAng.tNext,$whenCondition1,$whenCondition2,$whenCondition3,$whenCondition4,$whenCondition5,$whenCondition6,$whenCondition7) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (153): * Single equations (assignments): 152 * 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 0.000846/0.5677, allocations: 400.7 kB / 1.506 GB, free: 7.566 MB / 1.201 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0003659/0.5681, allocations: 139.1 kB / 1.506 GB, free: 7.43 MB / 1.201 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.00618/0.5743, allocations: 2.226 MB / 1.508 GB, free: 5.188 MB / 1.201 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 1.582e-05/0.5743, allocations: 16 kB / 1.508 GB, free: 5.172 MB / 1.201 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 5.761e-06/0.5743, allocations: 3.938 kB / 1.508 GB, free: 5.168 MB / 1.201 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 1.745e-05/0.5743, allocations: 7.969 kB / 1.508 GB, free: 5.16 MB / 1.201 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.002931/0.5772, allocations: 1.469 MB / 1.51 GB, free: 3.648 MB / 1.201 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 1.099e-05/0.5773, allocations: 0 / 1.51 GB, free: 3.648 MB / 1.201 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.001923/0.5792, allocations: 315.5 kB / 1.51 GB, free: 3.34 MB / 1.201 GB Notification: Performance of postOpt tearingSystem (simulation): time 0.0005366/0.5797, allocations: 76.78 kB / 1.51 GB, free: 3.262 MB / 1.201 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 0.0001844/0.5799, allocations: 47.95 kB / 1.51 GB, free: 3.215 MB / 1.201 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.002123/0.582, allocations: 1.558 MB / 1.512 GB, free: 1.539 MB / 1.201 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 1.533e-06/0.582, allocations: 4 kB / 1.512 GB, free: 1.535 MB / 1.201 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.005226/0.5872, allocations: 1.934 MB / 1.514 GB, free: 15.58 MB / 1.217 GB Notification: Performance of postOpt removeConstants (simulation): time 0.0009254/0.5882, allocations: 362.5 kB / 1.514 GB, free: 15.23 MB / 1.217 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0002405/0.5884, allocations: 43.89 kB / 1.514 GB, free: 15.18 MB / 1.217 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.00153/0.5899, allocations: 147.8 kB / 1.514 GB, free: 15.04 MB / 1.217 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0002514/0.5902, allocations: 125 kB / 1.514 GB, free: 14.91 MB / 1.217 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 0.0001426/0.5903, allocations: 60.09 kB / 1.514 GB, free: 14.86 MB / 1.217 GB Notification: Performance of sorting global known variables: time 0.001024/0.5914, allocations: 0.7072 MB / 1.515 GB, free: 14.14 MB / 1.217 GB Notification: Performance of sort global known variables: time 8e-08/0.5914, allocations: 0 / 1.515 GB, free: 14.14 MB / 1.217 GB Notification: Performance of remove unused functions: time 0.001334/0.5927, allocations: 0.5181 MB / 1.516 GB, free: 13.62 MB / 1.217 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 1 * Number of states: 0 () * Number of discrete variables: 15 ($whenCondition7,$whenCondition6,$whenCondition5,$whenCondition4,$whenCondition3,$whenCondition2,$whenCondition1,pumCon.HDifTilIso.incAng.decAng.tNext,pumCon.HDirTil.incAng.decAng.tNext,pumCon.hys.y,weaDat.locTim.tNext,weaDat.conTimMin.tNext,weaDat.conTim.tNext,weaDat.eqnTim.tNext,weaDat.decAng.tNext) * Number of discrete states: 8 (pumCon.hys.y,pumCon.HDifTilIso.incAng.decAng.tNext,pumCon.HDirTil.incAng.decAng.tNext,weaDat.locTim.tNext,weaDat.conTimMin.tNext,weaDat.conTim.tNext,weaDat.eqnTim.tNext,weaDat.decAng.tNext) * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for simulation (155): * Single equations (assignments): 147 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 7 * 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 0.007312/0.6, allocations: 3.056 MB / 1.519 GB, free: 10.74 MB / 1.217 GB Notification: Performance of simCode: created initialization part: time 0.004676/0.6047, allocations: 1.735 MB / 1.52 GB, free: 8.996 MB / 1.217 GB Notification: Performance of simCode: created event and clocks part: time 5.631e-06/0.6047, allocations: 4 kB / 1.52 GB, free: 8.992 MB / 1.217 GB Notification: Performance of simCode: created simulation system equations: time 0.002427/0.6071, allocations: 0.9822 MB / 1.521 GB, free: 7.996 MB / 1.217 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.00165/0.6088, allocations: 406.1 kB / 1.522 GB, free: 7.617 MB / 1.217 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.02311/0.6319, allocations: 11.5 MB / 1.533 GB, free: 11.98 MB / 1.233 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0007808/0.6327, allocations: 0.7061 MB / 1.534 GB, free: 11.23 MB / 1.233 GB Notification: Performance of simCode: alias equations: time 0.001596/0.6343, allocations: 402.5 kB / 1.534 GB, free: 10.83 MB / 1.233 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.001129/0.6354, allocations: 0.6944 MB / 1.535 GB, free: 10.14 MB / 1.233 GB Notification: Performance of SimCode: time 9.22e-07/0.6354, allocations: 0 / 1.535 GB, free: 10.14 MB / 1.233 GB Notification: Performance of buildModelFMU: Generate the FMI files: time 0.08282/0.7182, allocations: 38.78 MB / 1.573 GB, free: 3.773 MB / 1.264 GB Notification: Performance of buildModelFMU: Generate platform static: time 13.3/14.02, allocations: 5.609 kB / 1.573 GB, free: 3.77 MB / 1.264 GB " [Timeout remaining time 286] (rm -f Buildings_12_Buildings.Fluid.SolarCollectors.Controls.Examples.SolarPumpController.pipe ; mkfifo Buildings_12_Buildings.Fluid.SolarCollectors.Controls.Examples.SolarPumpController.pipe ; head -c 1048576 < Buildings_12_Buildings.Fluid.SolarCollectors.Controls.Examples.SolarPumpController.pipe >> ../files/Buildings_12_Buildings.Fluid.SolarCollectors.Controls.Examples.SolarPumpController.sim & /home/hudson/saved_omc/OMSimulator/install/bin/OMSimulator -r=Buildings_12_Buildings.Fluid.SolarCollectors.Controls.Examples.SolarPumpController_res.mat --tempDir=temp_Buildings_12_Buildings_Fluid_SolarCollectors_Controls_Examples_SolarPumpController_fmu --startTime=0 --stopTime=86400 --stepSize=34.56 --timeout=400 --tolerance=1e-06 Buildings_12_Buildings_Fluid_SolarCollectors_Controls_Examples_SolarPumpController.fmu > Buildings_12_Buildings.Fluid.SolarCollectors.Controls.Examples.SolarPumpController.pipe 2>&1) [Timeout 420.0] diffSimulationResults("Buildings_12_Buildings.Fluid.SolarCollectors.Controls.Examples.SolarPumpController_res.mat","/mnt/ReferenceFiles/Buildings/csv/maint_12.x/Buildings_Fluid_SolarCollectors_Controls_Examples_SolarPumpController.csv","/var/lib/jenkins1/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/files/Buildings_12_Buildings.Fluid.SolarCollectors.Controls.Examples.SolarPumpController.diff",relTol=0.003,relTolDiffMinMax=0.003,rangeDelta=0.001) [Timeout 300] "" [Timeout remaining time 300] Reference file matches [Calling sys.exit(0), Time elapsed: 20.338383461988997]