Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr Buildings_latest_Buildings.Examples.ChillerPlant.DataCenter.BaseClasses.Controls.Examples.WSEControl.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 0.0009212/0.0009212, allocations: 80.94 kB / 19.94 MB, free: 4.547 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 0.0009431/0.0009431, allocations: 173.4 kB / 23.36 MB, free: 1.133 MB / 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 0.8713/0.8713, allocations: 177.1 MB / 203.8 MB, free: 5.5 MB / 186.7 MB " [Timeout remaining time 179] loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings master/package.mo", uses=false) [Timeout 180] "Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings master/package.mo): time 2.301/2.301, allocations: 438.8 MB / 0.6827 GB, free: 13.59 MB / 0.6511 GB " [Timeout remaining time 177] Using package Buildings with version 14.1.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 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(Buildings.Examples.ChillerPlant.DataCenter.BaseClasses.Controls.Examples.WSEControl,tolerance=1e-06,outputFormat="mat",numberOfIntervals=2500,variableFilter="time|wseCon.wseCWST|wseCon.wseCHWST|wseCon.TWetBul|wseCon.y1|wseCon.y2",fileNamePrefix="Buildings_latest_Buildings.Examples.ChillerPlant.DataCenter.BaseClasses.Controls.Examples.WSEControl") translateModel(Buildings.Examples.ChillerPlant.DataCenter.BaseClasses.Controls.Examples.WSEControl,tolerance=1e-06,outputFormat="mat",numberOfIntervals=2500,variableFilter="time|wseCon.wseCWST|wseCon.wseCHWST|wseCon.TWetBul|wseCon.y1|wseCon.y2",fileNamePrefix="Buildings_latest_Buildings.Examples.ChillerPlant.DataCenter.BaseClasses.Controls.Examples.WSEControl") [Timeout 300] "Notification: Performance of FrontEnd - loaded program: time 1.774e-06/1.774e-06, allocations: 0 / 0.8386 GB, free: 14.19 MB / 0.8073 GB Notification: Performance of FrontEnd - Absyn->SCode: time 2.476e-05/2.653e-05, allocations: 2.312 kB / 0.8386 GB, free: 14.19 MB / 0.8073 GB Notification: Performance of NFInst.instantiate(Buildings.Examples.ChillerPlant.DataCenter.BaseClasses.Controls.Examples.WSEControl): time 0.003829/0.003855, allocations: 2.043 MB / 0.8406 GB, free: 12.13 MB / 0.8073 GB Notification: Performance of NFInst.instExpressions: time 0.001561/0.005416, allocations: 0.7206 MB / 0.8413 GB, free: 11.41 MB / 0.8073 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.0001671/0.005583, allocations: 7.938 kB / 0.8413 GB, free: 11.4 MB / 0.8073 GB Notification: Performance of NFTyping.typeComponents: time 0.0001614/0.005745, allocations: 39.55 kB / 0.8413 GB, free: 11.36 MB / 0.8073 GB Notification: Performance of NFTyping.typeBindings: time 0.0001221/0.005867, allocations: 35.66 kB / 0.8414 GB, free: 11.32 MB / 0.8073 GB Notification: Performance of NFTyping.typeClassSections: time 0.0005394/0.006406, allocations: 171.7 kB / 0.8415 GB, free: 11.16 MB / 0.8073 GB Notification: Performance of NFFlatten.flatten: time 0.0005809/0.006987, allocations: 415.1 kB / 0.8419 GB, free: 10.75 MB / 0.8073 GB Notification: Performance of NFFlatten.resolveConnections: time 0.0003934/0.00738, allocations: 215.3 kB / 0.8421 GB, free: 10.54 MB / 0.8073 GB Notification: Performance of NFEvalConstants.evaluate: time 0.0002963/0.007677, allocations: 215.6 kB / 0.8424 GB, free: 10.33 MB / 0.8073 GB Notification: Performance of NFSimplifyModel.simplify: time 0.0001885/0.007865, allocations: 107.7 kB / 0.8425 GB, free: 10.23 MB / 0.8073 GB Notification: Performance of NFPackage.collectConstants: time 6.378e-05/0.007929, allocations: 40 kB / 0.8425 GB, free: 10.19 MB / 0.8073 GB Notification: Performance of NFFlatten.collectFunctions: time 9.423e-05/0.008023, allocations: 43.98 kB / 0.8425 GB, free: 10.14 MB / 0.8073 GB Notification: Performance of NFScalarize.scalarize: time 9.381e-05/0.008117, allocations: 87.73 kB / 0.8426 GB, free: 10.06 MB / 0.8073 GB Notification: Performance of NFVerifyModel.verify: time 0.0001153/0.008232, allocations: 99.8 kB / 0.8427 GB, free: 9.961 MB / 0.8073 GB Notification: Performance of NFConvertDAE.convert: time 0.0004287/0.008661, allocations: 271 kB / 0.843 GB, free: 9.695 MB / 0.8073 GB Notification: Performance of FrontEnd - DAE generated: time 4.158e-06/0.008665, allocations: 0 / 0.843 GB, free: 9.695 MB / 0.8073 GB Notification: Performance of FrontEnd: time 1.633e-06/0.008667, allocations: 0 / 0.843 GB, free: 9.695 MB / 0.8073 GB Notification: Performance of Transformations before backend: time 7.494e-06/0.008674, allocations: 0 / 0.843 GB, free: 9.695 MB / 0.8073 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 72 * Number of variables: 72 Notification: Performance of Generate backend data structure: time 0.0008756/0.00955, allocations: 0.5103 MB / 0.8435 GB, free: 9.152 MB / 0.8073 GB Notification: Performance of prepare preOptimizeDAE: time 4.265e-05/0.009593, allocations: 12.61 kB / 0.8435 GB, free: 9.141 MB / 0.8073 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.000281/0.009874, allocations: 56.89 kB / 0.8435 GB, free: 9.086 MB / 0.8073 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.0002881/0.01016, allocations: 179.7 kB / 0.8437 GB, free: 8.887 MB / 0.8073 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 4.074e-05/0.0102, allocations: 29.03 kB / 0.8437 GB, free: 8.859 MB / 0.8073 GB Notification: Performance of preOpt expandDerOperator (simulation): time 4.722e-05/0.01025, allocations: 32.31 kB / 0.8438 GB, free: 8.828 MB / 0.8073 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.0004123/0.01066, allocations: 250.2 kB / 0.844 GB, free: 8.57 MB / 0.8073 GB Notification: Performance of preOpt findStateOrder (simulation): time 1.323e-05/0.01068, allocations: 4.125 kB / 0.844 GB, free: 8.566 MB / 0.8073 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 2.536e-05/0.0107, allocations: 12.38 kB / 0.844 GB, free: 8.555 MB / 0.8073 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 1.292e-05/0.01071, allocations: 11.94 kB / 0.844 GB, free: 8.543 MB / 0.8073 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.0001811/0.01089, allocations: 76.55 kB / 0.8441 GB, free: 8.465 MB / 0.8073 GB Notification: Performance of preOpt removeSimpleEquations (simulation): time 0.001061/0.01196, allocations: 0.5826 MB / 0.8447 GB, free: 7.863 MB / 0.8073 GB Notification: Performance of preOpt comSubExp (simulation): time 0.0002664/0.01222, allocations: 134.4 kB / 0.8448 GB, free: 7.723 MB / 0.8073 GB Notification: Performance of preOpt resolveLoops (simulation): time 8.212e-05/0.0123, allocations: 52.77 kB / 0.8449 GB, free: 7.668 MB / 0.8073 GB Notification: Performance of preOpt evalFunc (simulation): time 2.496e-05/0.01233, allocations: 8 kB / 0.8449 GB, free: 7.66 MB / 0.8073 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 0.000206/0.01254, allocations: 119.3 kB / 0.845 GB, free: 7.531 MB / 0.8073 GB Notification: Performance of pre-optimization done (n=32): time 3.987e-06/0.01254, allocations: 4 kB / 0.845 GB, free: 7.527 MB / 0.8073 GB Notification: Performance of matching and sorting (n=32): time 0.0003097/0.01285, allocations: 173.5 kB / 0.8451 GB, free: 7.352 MB / 0.8073 GB Notification: Performance of inlineWhenForInitialization (initialization): time 4.743e-05/0.0129, allocations: 59.41 kB / 0.8452 GB, free: 7.281 MB / 0.8073 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.0001407/0.01304, allocations: 183.1 kB / 0.8454 GB, free: 7.086 MB / 0.8073 GB Notification: Performance of collectPreVariables (initialization): time 3.755e-05/0.01307, allocations: 41.7 kB / 0.8454 GB, free: 7.039 MB / 0.8073 GB Notification: Performance of collectInitialEqns (initialization): time 8.867e-05/0.01316, allocations: 148.7 kB / 0.8456 GB, free: 6.891 MB / 0.8073 GB Notification: Performance of collectInitialBindings (initialization): time 6.917e-05/0.01323, allocations: 87.3 kB / 0.8456 GB, free: 6.805 MB / 0.8073 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.0001217/0.01335, allocations: 94.11 kB / 0.8457 GB, free: 6.707 MB / 0.8073 GB Notification: Performance of setup shared object (initialization): time 0.0001034/0.01346, allocations: 330.8 kB / 0.846 GB, free: 6.375 MB / 0.8073 GB Notification: Performance of preBalanceInitialSystem (initialization): time 9.443e-05/0.01355, allocations: 66.67 kB / 0.8461 GB, free: 6.305 MB / 0.8073 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.0001239/0.01368, allocations: 115.8 kB / 0.8462 GB, free: 6.164 MB / 0.8073 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.0002081/0.01388, allocations: 183.3 kB / 0.8464 GB, free: 5.961 MB / 0.8073 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 2.885e-06/0.01389, allocations: 0 / 0.8464 GB, free: 5.961 MB / 0.8073 GB Notification: Performance of matching and sorting (n=48) (initialization): time 0.0003134/0.0142, allocations: 240.6 kB / 0.8466 GB, free: 5.707 MB / 0.8073 GB Notification: Performance of prepare postOptimizeDAE: time 4.459e-05/0.01424, allocations: 41.62 kB / 0.8467 GB, free: 5.66 MB / 0.8073 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 7.174e-06/0.01425, allocations: 4.156 kB / 0.8467 GB, free: 5.656 MB / 0.8073 GB Notification: Performance of postOpt tearingSystem (initialization): time 1.673e-05/0.01427, allocations: 4 kB / 0.8467 GB, free: 5.652 MB / 0.8073 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0001697/0.01444, allocations: 43.92 kB / 0.8467 GB, free: 5.609 MB / 0.8073 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 8.546e-06/0.01445, allocations: 7.984 kB / 0.8467 GB, free: 5.602 MB / 0.8073 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0001476/0.01459, allocations: 39.77 kB / 0.8468 GB, free: 5.562 MB / 0.8073 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 2.198e-05/0.01462, allocations: 12 kB / 0.8468 GB, free: 5.551 MB / 0.8073 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 6 * Number of states: 0 () * Number of discrete variables: 36 ($PRE.wseCon.T1.enableFire,$PRE.wseCon.T2.enableFire,wseCon.stateGraphRoot.activeSteps,wseCon.T2.t_start,$PRE.wseCon.T2.t_start,wseCon.T2.fire,wseCon.T2.enableFire,wseCon.T2.localCondition,wseCon.on.oldActive,$PRE.wseCon.on.oldActive,wseCon.on.newActive,$PRE.wseCon.on.newActive,wseCon.on.localActive,$PRE.wseCon.on.localActive,wseCon.on.active,wseCon.T1.t_start,$PRE.wseCon.T1.t_start,wseCon.T1.fire,wseCon.T1.enableFire,wseCon.T1.localCondition,wseCon.off.active,wseCon.off.oldActive,$PRE.wseCon.off.oldActive,wseCon.off.newActive,$PRE.wseCon.off.newActive,wseCon.off.localActive,$PRE.wseCon.off.localActive,wseCHWST.count,$PRE.wseCHWST.count,wseCHWST.T_start,$PRE.wseCHWST.T_start,$whenCondition1,$whenCondition2,$whenCondition3,wseCon.stateGraphRoot.suspend,wseCon.stateGraphRoot.resume) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (47): * Single equations (assignments): 46 * Array equations: 0 * Algorithm blocks: 1 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 0 * Torn equation systems: 0 * Mixed (continuous/discrete) equation systems: 0 Notification: Performance of prepare postOptimizeDAE: time 0.0001311/0.01475, allocations: 149.7 kB / 0.8469 GB, free: 5.395 MB / 0.8073 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 3.717e-05/0.01478, allocations: 27.97 kB / 0.8469 GB, free: 5.367 MB / 0.8073 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 4.864e-05/0.01483, allocations: 30.59 kB / 0.847 GB, free: 5.336 MB / 0.8073 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 4.749e-06/0.01484, allocations: 4 kB / 0.847 GB, free: 5.332 MB / 0.8073 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 4.188e-06/0.01484, allocations: 7.922 kB / 0.847 GB, free: 5.324 MB / 0.8073 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 4.519e-06/0.01485, allocations: 0 / 0.847 GB, free: 5.324 MB / 0.8073 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.0005974/0.01544, allocations: 400.4 kB / 0.8474 GB, free: 4.91 MB / 0.8073 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 2.304e-06/0.01545, allocations: 0 / 0.8474 GB, free: 4.91 MB / 0.8073 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0001002/0.01555, allocations: 31.91 kB / 0.8474 GB, free: 4.879 MB / 0.8073 GB Notification: Performance of postOpt tearingSystem (simulation): time 3.367e-06/0.01555, allocations: 0 / 0.8474 GB, free: 4.879 MB / 0.8073 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 1.361e-05/0.01556, allocations: 8 kB / 0.8474 GB, free: 4.871 MB / 0.8073 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 2.775e-06/0.01557, allocations: 4 kB / 0.8474 GB, free: 4.867 MB / 0.8073 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 1.382e-06/0.01557, allocations: 0 / 0.8474 GB, free: 4.867 MB / 0.8073 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.0002276/0.0158, allocations: 244.6 kB / 0.8476 GB, free: 4.613 MB / 0.8073 GB Notification: Performance of postOpt removeConstants (simulation): time 2.355e-05/0.01582, allocations: 15.84 kB / 0.8476 GB, free: 4.598 MB / 0.8073 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 2.99e-05/0.01585, allocations: 8 kB / 0.8477 GB, free: 4.59 MB / 0.8073 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0001381/0.01599, allocations: 27.97 kB / 0.8477 GB, free: 4.562 MB / 0.8073 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 8.744e-05/0.01607, allocations: 35.94 kB / 0.8477 GB, free: 4.527 MB / 0.8073 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 1.605e-05/0.01609, allocations: 12 kB / 0.8477 GB, free: 4.516 MB / 0.8073 GB Notification: Performance of sorting global known variables: time 4.817e-05/0.01614, allocations: 34.45 kB / 0.8478 GB, free: 4.48 MB / 0.8073 GB Notification: Performance of sort global known variables: time 8e-08/0.01614, allocations: 0 / 0.8478 GB, free: 4.48 MB / 0.8073 GB Notification: Performance of remove unused functions: time 0.0003376/0.01648, allocations: 71.78 kB / 0.8478 GB, free: 4.41 MB / 0.8073 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 1 * Number of states: 0 () * Number of discrete variables: 22 (wseCon.T1.enableFire,wseCon.T2.enableFire,wseCon.on.active,wseCon.off.active,$whenCondition3,$whenCondition2,$whenCondition1,wseCHWST.T_start,wseCHWST.count,wseCon.off.localActive,wseCon.off.newActive,wseCon.off.oldActive,wseCon.T1.localCondition,wseCon.T1.fire,wseCon.T1.t_start,wseCon.on.localActive,wseCon.on.newActive,wseCon.on.oldActive,wseCon.T2.localCondition,wseCon.T2.fire,wseCon.T2.t_start,wseCon.stateGraphRoot.activeSteps) * Number of discrete states: 3 (wseCHWST.count,wseCon.off.newActive,wseCon.on.newActive) * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for simulation (32): * Single equations (assignments): 26 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 6 * If-equations: 0 * Equation systems (not torn): 0 * Torn equation systems: 0 * Mixed (continuous/discrete) equation systems: 0 Notification: Performance of Backend phase and start with SimCode phase: time 0.0001412/0.01662, allocations: 102.3 kB / 0.8479 GB, free: 4.305 MB / 0.8073 GB Notification: Performance of simCode: created initialization part: time 0.0003033/0.01692, allocations: 230.8 kB / 0.8481 GB, free: 4.055 MB / 0.8073 GB Notification: Performance of simCode: created event and clocks part: time 5.279e-06/0.01693, allocations: 320 / 0.8481 GB, free: 4.055 MB / 0.8073 GB Notification: Performance of simCode: created simulation system equations: time 0.000126/0.01705, allocations: 88.69 kB / 0.8482 GB, free: 3.965 MB / 0.8073 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.0002735/0.01733, allocations: 35.91 kB / 0.8483 GB, free: 3.93 MB / 0.8073 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.0008744/0.0182, allocations: 420.2 kB / 0.8487 GB, free: 3.496 MB / 0.8073 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 6.942e-05/0.01827, allocations: 84.94 kB / 0.8487 GB, free: 3.391 MB / 0.8073 GB Notification: Performance of simCode: alias equations: time 0.0001059/0.01838, allocations: 30.28 kB / 0.8488 GB, free: 3.359 MB / 0.8073 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0001577/0.01853, allocations: 91.36 kB / 0.8489 GB, free: 3.27 MB / 0.8073 GB Notification: Performance of SimCode: time 9.71e-07/0.01853, allocations: 0 / 0.8489 GB, free: 3.27 MB / 0.8073 GB Notification: Performance of Templates: time 0.006777/0.02531, allocations: 3.068 MB / 0.8519 GB, free: 292 kB / 0.8073 GB " [Timeout remaining time 300] make -j1 -f Buildings_latest_Buildings.Examples.ChillerPlant.DataCenter.BaseClasses.Controls.Examples.WSEControl.makefile [Timeout 300] (rm -f Buildings_latest_Buildings.Examples.ChillerPlant.DataCenter.BaseClasses.Controls.Examples.WSEControl.pipe ; mkfifo Buildings_latest_Buildings.Examples.ChillerPlant.DataCenter.BaseClasses.Controls.Examples.WSEControl.pipe ; head -c 1048576 < Buildings_latest_Buildings.Examples.ChillerPlant.DataCenter.BaseClasses.Controls.Examples.WSEControl.pipe >> ../files/Buildings_latest_Buildings.Examples.ChillerPlant.DataCenter.BaseClasses.Controls.Examples.WSEControl.sim & ./Buildings_latest_Buildings.Examples.ChillerPlant.DataCenter.BaseClasses.Controls.Examples.WSEControl -abortSlowSimulation -alarm=240 -emit_protected -lv LOG_STATS > Buildings_latest_Buildings.Examples.ChillerPlant.DataCenter.BaseClasses.Controls.Examples.WSEControl.pipe 2>&1) [Timeout 240] diffSimulationResults("Buildings_latest_Buildings.Examples.ChillerPlant.DataCenter.BaseClasses.Controls.Examples.WSEControl_res.mat","/mnt/ReferenceFiles/Buildings/csv/master/Buildings_Examples_ChillerPlant_DataCenter_BaseClasses_Controls_Examples_WSEControl.csv","",relTol=0.003,relTolDiffMinMax=0.003,rangeDelta=0.001) [Timeout 300] "" [Timeout remaining time 300] Reference file matches [Calling sys.exit(0), Time elapsed: 4.922992784064263]