Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr Buildings_13_Buildings.Air.Systems.SingleZone.VAV.BaseClasses.Validation.ControllerChillerDXHeatingEconomizer.conf.json loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.1.0+maint.om/package.mo", uses=false) [Timeout 180] "[:1:22-1:33:writable] Warning: Modelica only supports 32-bit signed integers! Transforming: 13743895347 into a real Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.1.0+maint.om/package.mo): time 0.0002294/0.0002294, allocations: 0 / 0, free: 0 / 0 " [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 0.0001854/0.0001854, allocations: 0 / 0, free: 0 / 0 " [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 0.1074/0.1074, allocations: 0 / 0, free: 0 / 0 " [Timeout remaining time 180] loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 13.0.2-maint.13.x/package.mo", uses=false) [Timeout 180] "Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 13.0.2-maint.13.x/package.mo): time 0.2183/0.2183, allocations: 0 / 0, free: 0 / 0 " [Timeout remaining time 180] Using package Buildings with version 13.0.2 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 13.0.2-maint.13.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: simulate(Buildings.Air.Systems.SingleZone.VAV.BaseClasses.Validation.ControllerChillerDXHeatingEconomizer,startTime=0,stopTime=172800,tolerance=1e-06,numberOfIntervals=2500,outputFormat="empty",variableFilter="",fileNamePrefix="Buildings_13_Buildings.Air.Systems.SingleZone.VAV.BaseClasses.Validation.ControllerChillerDXHeatingEconomizer",simflags="-abortSlowSimulation -alarm=240 -lv LOG_STATS") simulate(Buildings.Air.Systems.SingleZone.VAV.BaseClasses.Validation.ControllerChillerDXHeatingEconomizer,startTime=0,stopTime=172800,tolerance=1e-06,numberOfIntervals=2500,outputFormat="empty",variableFilter="",fileNamePrefix="Buildings_13_Buildings.Air.Systems.SingleZone.VAV.BaseClasses.Validation.ControllerChillerDXHeatingEconomizer",simflags="-abortSlowSimulation -alarm=240 -lv LOG_STATS") [Timeout 540] "Notification: Performance of FrontEnd - loaded program: time 1.012e-06/1.012e-06, allocations: 0 / 0, free: 0 / 0 Notification: Performance of FrontEnd - Absyn->SCode: time 1.436e-05/1.537e-05, allocations: 0 / 0, free: 0 / 0 Notification: Performance of NFInst.instantiate(Buildings.Air.Systems.SingleZone.VAV.BaseClasses.Validation.ControllerChillerDXHeatingEconomizer): time 0.007566/0.007581, allocations: 0 / 0, free: 0 / 0 Notification: Performance of NFInst.instExpressions: time 0.007623/0.0152, allocations: 0 / 0, free: 0 / 0 Notification: Performance of NFInst.updateImplicitVariability: time 0.0006755/0.01588, allocations: 0 / 0, free: 0 / 0 Notification: Performance of NFTyping.typeComponents: time 0.0009429/0.01682, allocations: 0 / 0, free: 0 / 0 Notification: Performance of NFTyping.typeBindings: time 0.001342/0.01817, allocations: 0 / 0, free: 0 / 0 Notification: Performance of NFTyping.typeClassSections: time 0.002061/0.02023, allocations: 0 / 0, free: 0 / 0 Notification: Performance of NFFlatten.flatten: time 0.001887/0.02211, allocations: 0 / 0, free: 0 / 0 Notification: Performance of NFFlatten.resolveConnections: time 0.0009596/0.02307, allocations: 0 / 0, free: 0 / 0 Notification: Performance of NFEvalConstants.evaluate: time 0.002501/0.02557, allocations: 0 / 0, free: 0 / 0 Notification: Performance of NFSimplifyModel.simplify: time 0.0005993/0.02617, allocations: 0 / 0, free: 0 / 0 Notification: Performance of NFPackage.collectConstants: time 0.0001767/0.02635, allocations: 0 / 0, free: 0 / 0 Notification: Performance of NFFlatten.collectFunctions: time 0.0004559/0.02681, allocations: 0 / 0, free: 0 / 0 Notification: Performance of NFScalarize.scalarize: time 0.0004115/0.02722, allocations: 0 / 0, free: 0 / 0 Notification: Performance of NFVerifyModel.verify: time 0.0005023/0.02772, allocations: 0 / 0, free: 0 / 0 Notification: Performance of NFConvertDAE.convert: time 0.002014/0.02973, allocations: 0 / 0, free: 0 / 0 Notification: Performance of FrontEnd - DAE generated: time 0.0001821/0.02992, allocations: 0 / 0, free: 0 / 0 Notification: Performance of FrontEnd: time 1.623e-06/0.02992, allocations: 0 / 0, free: 0 / 0 Notification: Performance of Transformations before backend: time 1.232e-05/0.02993, allocations: 0 / 0, free: 0 / 0 Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 253 * Number of variables: 253 Notification: Performance of Generate backend data structure: time 0.002483/0.03241, allocations: 0 / 0, free: 0 / 0 Notification: Performance of prepare preOptimizeDAE: time 0.0001541/0.03257, allocations: 0 / 0, free: 0 / 0 Notification: Performance of preOpt normalInlineFunction (simulation): time 0.0004952/0.03306, allocations: 0 / 0, free: 0 / 0 Notification: Performance of preOpt evaluateParameters (simulation): time 0.001589/0.03465, allocations: 0 / 0, free: 0 / 0 Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.000129/0.03478, allocations: 0 / 0, free: 0 / 0 Notification: Performance of preOpt expandDerOperator (simulation): time 0.0001669/0.03495, allocations: 0 / 0, free: 0 / 0 Notification: Performance of preOpt clockPartitioning (simulation): time 0.001297/0.03624, allocations: 0 / 0, free: 0 / 0 Notification: Performance of preOpt findStateOrder (simulation): time 3.094e-05/0.03627, allocations: 0 / 0, free: 0 / 0 Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.000107/0.03638, allocations: 0 / 0, free: 0 / 0 Notification: Performance of preOpt inlineArrayEqn (simulation): time 2.719e-05/0.03641, allocations: 0 / 0, free: 0 / 0 Notification: Performance of preOpt removeEqualRHS (simulation): time 0.0006443/0.03705, allocations: 0 / 0, free: 0 / 0 Notification: Performance of preOpt removeSimpleEquations (simulation): time 0.003522/0.04057, allocations: 0 / 0, free: 0 / 0 Notification: Performance of preOpt comSubExp (simulation): time 0.0007771/0.04135, allocations: 0 / 0, free: 0 / 0 Notification: Performance of preOpt resolveLoops (simulation): time 0.0002927/0.04164, allocations: 0 / 0, free: 0 / 0 Notification: Performance of preOpt evalFunc (simulation): time 4.847e-05/0.04169, allocations: 0 / 0, free: 0 / 0 Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 0.0006076/0.0423, allocations: 0 / 0, free: 0 / 0 Notification: Performance of pre-optimization done (n=96): time 8.356e-06/0.04231, allocations: 0 / 0, free: 0 / 0 Notification: Performance of matching and sorting (n=96): time 0.0009132/0.04322, allocations: 0 / 0, free: 0 / 0 Notification: Performance of inlineWhenForInitialization (initialization): time 4.769e-05/0.04327, allocations: 0 / 0, free: 0 / 0 Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.0008954/0.04417, allocations: 0 / 0, free: 0 / 0 Notification: Performance of collectPreVariables (initialization): time 0.0001361/0.0443, allocations: 0 / 0, free: 0 / 0 Notification: Performance of collectInitialEqns (initialization): time 0.0003123/0.04461, allocations: 0 / 0, free: 0 / 0 Notification: Performance of collectInitialBindings (initialization): time 0.0002207/0.04483, allocations: 0 / 0, free: 0 / 0 Notification: Performance of simplifyInitialFunctions (initialization): time 0.0002901/0.04512, allocations: 0 / 0, free: 0 / 0 Notification: Performance of setup shared object (initialization): time 3.597e-05/0.04516, allocations: 0 / 0, free: 0 / 0 Notification: Performance of preBalanceInitialSystem (initialization): time 0.0002392/0.0454, allocations: 0 / 0, free: 0 / 0 Notification: Performance of partitionIndependentBlocks (initialization): time 0.0003254/0.04572, allocations: 0 / 0, free: 0 / 0 Notification: Performance of analyzeInitialSystem (initialization): time 0.0005762/0.0463, allocations: 0 / 0, free: 0 / 0 Notification: Performance of solveInitialSystemEqSystem (initialization): time 1.156e-05/0.04631, allocations: 0 / 0, free: 0 / 0 Notification: Performance of matching and sorting (n=159) (initialization): time 0.0009068/0.04722, allocations: 0 / 0, free: 0 / 0 Notification: Performance of prepare postOptimizeDAE: time 2.648e-05/0.04725, allocations: 0 / 0, free: 0 / 0 Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.963e-05/0.04727, allocations: 0 / 0, free: 0 / 0 Notification: Performance of postOpt tearingSystem (initialization): time 2.954e-05/0.0473, allocations: 0 / 0, free: 0 / 0 Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0005986/0.04789, allocations: 0 / 0, free: 0 / 0 Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 3.179e-05/0.04793, allocations: 0 / 0, free: 0 / 0 Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0004132/0.04834, allocations: 0 / 0, free: 0 / 0 Notification: Performance of postOpt collapseArrayExpressions (initialization): time 7.774e-05/0.04842, allocations: 0 / 0, free: 0 / 0 Notification: Performance of preBalanceInitialSystem (initialization_lambda0): time 0.000377/0.04879, allocations: 0 / 0, free: 0 / 0 Notification: Performance of partitionIndependentBlocks (initialization_lambda0): time 0.0003047/0.0491, allocations: 0 / 0, free: 0 / 0 Notification: Performance of analyzeInitialSystem (initialization_lambda0): time 0.0005392/0.04964, allocations: 0 / 0, free: 0 / 0 Notification: Performance of solveInitialSystemEqSystem (initialization_lambda0): time 1.12e-05/0.04965, allocations: 0 / 0, free: 0 / 0 Notification: Performance of matching and sorting (n=159) (initialization_lambda0): time 0.0008777/0.05053, allocations: 0 / 0, free: 0 / 0 Notification: Performance of prepare postOptimizeDAE: time 2.801e-05/0.05055, allocations: 0 / 0, free: 0 / 0 Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.611e-05/0.05057, allocations: 0 / 0, free: 0 / 0 Notification: Performance of postOpt tearingSystem (initialization): time 1.937e-05/0.05059, allocations: 0 / 0, free: 0 / 0 Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0005648/0.05115, allocations: 0 / 0, free: 0 / 0 Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 2.576e-05/0.05118, allocations: 0 / 0, free: 0 / 0 Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0004104/0.05159, allocations: 0 / 0, free: 0 / 0 Notification: Performance of postOpt collapseArrayExpressions (initialization): time 7.109e-05/0.05166, allocations: 0 / 0, free: 0 / 0 Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 21 * Number of states: 0 () * Number of discrete variables: 70 ($PRE.TSetRooCoo.tab.nextTimeEvent,$whenCondition8,$PRE.TSetRooHea.tab.nextTimeEvent,$whenCondition7,con.conSup.conHeaCoi.I.trigger_internal,con.conSup.conFan.I.trigger_internal,con.conEco.con.I.trigger_internal,con.conCooVal.I.trigger_internal,occSch.tNext,$PRE.occSch.tNext,occSch.tNonOcc,$PRE.occSch.tNonOcc,occSch.tOcc,$PRE.occSch.tOcc,occSch.occupied,$PRE.occSch.occupied,TSetRooCoo.tab.nextTimeEventScaled,$PRE.TSetRooCoo.tab.nextTimeEventScaled,TSetRooCoo.tab.nextTimeEvent,TSetRooHea.tab.nextTimeEventScaled,$PRE.TSetRooHea.tab.nextTimeEventScaled,TSetRooHea.tab.nextTimeEvent,con.heaOnTRoo.greHys.y,$PRE.con.heaOnTRoo.greHys.y,con.chiOnTRoo.greHys.y,$PRE.con.chiOnTRoo.greHys.y,con.orFan.uTemp[2],con.orFan.y,con.conEco.pre1.u,$PRE.con.conEco.pre1.u,con.conEco.hysTMix.y,$PRE.con.conEco.hysTMix.y,con.conEco.truFalHolTMix.entryTimeFalse,$PRE.con.conEco.truFalHolTMix.entryTimeFalse,con.conEco.truFalHolTMix.entryTimeTrue,$PRE.con.conEco.truFalHolTMix.entryTimeTrue,con.conEco.truFalHolTMix.not_y,$PRE.con.conEco.truFalHolTMix.not_y,con.conEco.truFalHolTMix.not_u,$PRE.con.conEco.truFalHolTMix.not_u,con.conEco.truFalHolTMix.y,$PRE.con.conEco.truFalHolTMix.y,con.conEco.truFalHolTMix.u,$PRE.con.conEco.truFalHolTMix.u,con.conEco.truFalHolCooPot.entryTimeFalse,$PRE.con.conEco.truFalHolCooPot.entryTimeFalse,con.conEco.truFalHolCooPot.entryTimeTrue,$PRE.con.conEco.truFalHolCooPot.entryTimeTrue,con.conEco.truFalHolCooPot.not_y,$PRE.con.conEco.truFalHolCooPot.not_y,con.conEco.truFalHolCooPot.not_u,$PRE.con.conEco.truFalHolCooPot.not_u,con.conEco.truFalHolCooPot.y,$PRE.con.conEco.truFalHolCooPot.y,con.conEco.truFalHolCooPot.u,$PRE.con.conEco.truFalHolCooPot.u,con.conEco.hysCooPot.y,$PRE.con.conEco.hysCooPot.y,con.conEco.not1.y,con.conEco.yCoiSta,con.conEco.hysChiPla.y,$PRE.con.conEco.hysChiPla.y,con.chiOn,$whenCondition1,$whenCondition2,$whenCondition3,$whenCondition4,$whenCondition5,$whenCondition6,$whenCondition9) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (156): * Single equations (assignments): 155 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 1 * 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 0.0003143/0.05198, allocations: 0 / 0, free: 0 / 0 Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0001513/0.05213, allocations: 0 / 0, free: 0 / 0 Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.0007979/0.05293, allocations: 0 / 0, free: 0 / 0 Notification: Performance of postOpt inlineArrayEqn (simulation): time 1.133e-05/0.05294, allocations: 0 / 0, free: 0 / 0 Notification: Performance of postOpt constantLinearSystem (simulation): time 7.344e-06/0.05294, allocations: 0 / 0, free: 0 / 0 Notification: Performance of postOpt simplifysemiLinear (simulation): time 1.004e-05/0.05295, allocations: 0 / 0, free: 0 / 0 Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.001449/0.0544, allocations: 0 / 0, free: 0 / 0 Notification: Performance of postOpt simplifyComplexFunction (simulation): time 6.422e-06/0.05441, allocations: 0 / 0, free: 0 / 0 Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0003875/0.0548, allocations: 0 / 0, free: 0 / 0 Notification: Performance of postOpt tearingSystem (simulation): time 8.706e-06/0.05481, allocations: 0 / 0, free: 0 / 0 Notification: Performance of postOpt inputDerivativesUsed (simulation): time 6.672e-05/0.05487, allocations: 0 / 0, free: 0 / 0 Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 1.158e-05/0.05488, allocations: 0 / 0, free: 0 / 0 Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 2.054e-06/0.05489, allocations: 0 / 0, free: 0 / 0 Notification: Performance of postOpt symbolicJacobian (simulation): time 0.0009984/0.05588, allocations: 0 / 0, free: 0 / 0 Notification: Performance of postOpt removeConstants (simulation): time 0.0003636/0.05625, allocations: 0 / 0, free: 0 / 0 Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0003765/0.05662, allocations: 0 / 0, free: 0 / 0 Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0003591/0.05698, allocations: 0 / 0, free: 0 / 0 Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0003042/0.05729, allocations: 0 / 0, free: 0 / 0 Notification: Performance of postOpt collapseArrayExpressions (simulation): time 8.17e-05/0.05737, allocations: 0 / 0, free: 0 / 0 Notification: Performance of sorting global known variables: time 0.0004467/0.05782, allocations: 0 / 0, free: 0 / 0 Notification: Performance of sort global known variables: time 4.274e-05/0.05786, allocations: 0 / 0, free: 0 / 0 Notification: Performance of remove unused functions: time 0.001385/0.05924, allocations: 0 / 0, free: 0 / 0 Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 2 * Number of states: 4 (con.conSup.conHeaCoi.I.y,con.conSup.conFan.I.y,con.conEco.con.I.y,con.conCooVal.I.y) * Number of discrete variables: 40 ($whenCondition9,$whenCondition8,$whenCondition7,$whenCondition6,$whenCondition5,$whenCondition4,$whenCondition3,$whenCondition2,$whenCondition1,con.chiOn,con.conEco.hysChiPla.y,con.conEco.yCoiSta,con.conEco.not1.y,con.conEco.hysCooPot.y,con.conEco.truFalHolCooPot.u,con.conEco.truFalHolCooPot.y,con.conEco.truFalHolCooPot.not_u,con.conEco.truFalHolCooPot.not_y,con.conEco.truFalHolCooPot.entryTimeTrue,con.conEco.truFalHolCooPot.entryTimeFalse,con.conEco.truFalHolTMix.u,con.conEco.truFalHolTMix.y,con.conEco.truFalHolTMix.not_u,con.conEco.truFalHolTMix.not_y,con.conEco.truFalHolTMix.entryTimeTrue,con.conEco.truFalHolTMix.entryTimeFalse,con.conEco.hysTMix.y,con.conEco.pre1.u,con.orFan.y,con.orFan.uTemp[2],con.chiOnTRoo.greHys.y,con.heaOnTRoo.greHys.y,TSetRooHea.tab.nextTimeEvent,TSetRooHea.tab.nextTimeEventScaled,TSetRooCoo.tab.nextTimeEvent,TSetRooCoo.tab.nextTimeEventScaled,occSch.occupied,occSch.tOcc,occSch.tNonOcc,occSch.tNext) * Number of discrete states: 23 (occSch.tNext,TSetRooCoo.tab.nextTimeEvent,TSetRooHea.tab.nextTimeEvent,con.conEco.truFalHolTMix.entryTimeFalse,con.conEco.truFalHolTMix.entryTimeTrue,con.conEco.truFalHolCooPot.entryTimeFalse,con.conEco.truFalHolCooPot.entryTimeTrue,con.conEco.hysCooPot.y,con.conEco.truFalHolCooPot.not_u,con.conEco.truFalHolCooPot.u,con.conEco.hysTMix.y,con.conEco.truFalHolTMix.not_u,con.conEco.truFalHolTMix.u,con.conEco.pre1.u,con.conEco.hysChiPla.y,TSetRooCoo.tab.nextTimeEventScaled,con.chiOnTRoo.greHys.y,TSetRooHea.tab.nextTimeEventScaled,con.heaOnTRoo.greHys.y,con.conEco.truFalHolTMix.y,con.conEco.truFalHolTMix.not_y,con.conEco.truFalHolCooPot.y,con.conEco.truFalHolCooPot.not_y) * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for simulation (95): * Single equations (assignments): 84 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 11 * 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 0.0007525/0.06, allocations: 0 / 0, free: 0 / 0 Notification: Performance of simCode: created initialization part: time 0.001206/0.0612, allocations: 0 / 0, free: 0 / 0 Notification: Performance of simCode: created event and clocks part: time 2.599e-05/0.06123, allocations: 0 / 0, free: 0 / 0 Notification: Performance of simCode: created simulation system equations: time 0.0003345/0.06156, allocations: 0 / 0, free: 0 / 0 Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.001319/0.06288, allocations: 0 / 0, free: 0 / 0 Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.002761/0.06564, allocations: 0 / 0, free: 0 / 0 Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0003059/0.06595, allocations: 0 / 0, free: 0 / 0 Notification: Performance of simCode: alias equations: time 0.0007242/0.06667, allocations: 0 / 0, free: 0 / 0 Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0006907/0.06736, allocations: 0 / 0, free: 0 / 0 Notification: Performance of SimCode: time 5.05e-05/0.06741, allocations: 0 / 0, free: 0 / 0 Notification: Performance of Templates: time 0.005732/0.07314, allocations: 0 / 0, free: 0 / 0 " [Timeout remaining time 540] [Calling sys.exit(0), Time elapsed: 1.0783695494756103]