Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries/ --ompython_omhome=/usr Buildings_3.0.0_Buildings.Fluid.Movers.Examples.ClosedLoop_y.conf.json loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica_StateGraph2 2.0.2/package.mo", uses=false) loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo", uses=false) loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo", uses=false) loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 3.2.3+maint.om/package.mo", uses=false) loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 3.0.0/package.mo", uses=false) Using package Buildings with version 3.0.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 3.0.0/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 4.0.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo) Using package ModelicaServices with version 4.0.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo) Using package Modelica_StateGraph2 with version 2.0.2 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica_StateGraph2 2.0.2/package.mo) Running command: translateModel(Buildings.Fluid.Movers.Examples.ClosedLoop_y,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="Buildings_3.0.0_Buildings.Fluid.Movers.Examples.ClosedLoop_y") translateModel(Buildings.Fluid.Movers.Examples.ClosedLoop_y,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="Buildings_3.0.0_Buildings.Fluid.Movers.Examples.ClosedLoop_y") [/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica_StateGraph2 2.0.2/package.mo:257:38-257:110:writable] Warning: The file was not encoded in UTF-8: "

An important practical aspect of state machines is the abilit...". Defaulting to 7-bit ASCII with unknown characters replaced by '?'. To change encoding when loading a file: loadFile(encoding="ISO-XXXX-YY"). To change it in a package: add a file package.encoding at the top-level. Note: The Modelica Language Specification only allows files encoded in UTF-8. [/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica_StateGraph2 2.0.2/package.mo:761:36-761:108:writable] Warning: The file was not encoded in UTF-8: "

The Modelica_StateGraph2 library is described in detail in (O...". Defaulting to 7-bit ASCII with unknown characters replaced by '?'. To change encoding when loading a file: loadFile(encoding="ISO-XXXX-YY"). To change it in a package: add a file package.encoding at the top-level. Note: The Modelica Language Specification only allows files encoded in UTF-8. [/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica_StateGraph2 2.0.2/package.mo:1435:36-1435:108:writable] Warning: The file was not encoded in UTF-8: "

Main Authors:

SCode: time 0.2338/0.2351, allocations: 82.21 MB / 0.5935 GB, free: 5.941 MB / 446.1 MB Notification: Performance of NFInst.instantiate(Buildings.Fluid.Movers.Examples.ClosedLoop_y): time 0.7231/0.9583, allocations: 187.3 MB / 0.7763 GB, free: 7.402 MB / 0.545 GB Notification: Performance of NFInst.instExpressions: time 0.02336/0.9817, allocations: 15.04 MB / 0.791 GB, free: 1.363 MB / 0.545 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.002618/0.9844, allocations: 54.5 kB / 0.7911 GB, free: 1.34 MB / 0.545 GB Notification: Performance of NFTyping.typeComponents: time 0.00292/0.9873, allocations: 0.6436 MB / 0.7917 GB, free: 0.8203 MB / 0.545 GB [/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 3.2.3+maint.om/Fluid/Sources.mo:734:36-735:54:writable] Warning: 'each' used when modifying non-array element m_flow. [/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 3.2.3+maint.om/Fluid/Sources.mo:732:36-733:54:writable] Warning: 'each' used when modifying non-array element m_flow. Notification: Performance of NFTyping.typeBindings: time 0.007582/0.995, allocations: 1.8 MB / 0.7935 GB, free: 15.43 MB / 0.5606 GB Notification: Performance of NFTyping.typeClassSections: time 0.008364/1.003, allocations: 2.383 MB / 0.7958 GB, free: 13.9 MB / 0.5606 GB Notification: Performance of NFFlatten.flatten: time 0.007387/1.011, allocations: 4.498 MB / 0.8002 GB, free: 11.24 MB / 0.5606 GB Notification: Performance of NFFlatten.resolveConnections: time 0.00247/1.013, allocations: 1.068 MB / 0.8012 GB, free: 10.58 MB / 0.5606 GB Notification: Performance of NFEvalConstants.evaluate: time 0.005877/1.019, allocations: 1.679 MB / 0.8029 GB, free: 9.629 MB / 0.5606 GB Notification: Performance of NFSimplifyModel.simplify: time 0.003637/1.023, allocations: 1.273 MB / 0.8041 GB, free: 8.902 MB / 0.5606 GB Notification: Performance of NFPackage.collectConstants: time 0.0005397/1.023, allocations: 84.91 kB / 0.8042 GB, free: 8.902 MB / 0.5606 GB Notification: Performance of NFFlatten.collectFunctions: time 0.006588/1.03, allocations: 1.567 MB / 0.8057 GB, free: 8.113 MB / 0.5606 GB Notification: Performance of NFScalarize.scalarize: time 0.001617/1.032, allocations: 0.5445 MB / 0.8062 GB, free: 7.754 MB / 0.5606 GB Notification: Performance of NFVerifyModel.verify: time 0.001301/1.033, allocations: 381.8 kB / 0.8066 GB, free: 7.543 MB / 0.5606 GB Notification: Performance of NFConvertDAE.convert: time 0.007022/1.04, allocations: 2.94 MB / 0.8095 GB, free: 5.273 MB / 0.5606 GB Notification: Performance of FrontEnd - DAE generated: time 8.586e-06/1.04, allocations: 0 / 0.8095 GB, free: 5.273 MB / 0.5606 GB Notification: Performance of FrontEnd: time 3.466e-06/1.04, allocations: 4 kB / 0.8095 GB, free: 5.27 MB / 0.5606 GB Notification: Performance of Transformations before backend: time 0.0001858/1.04, allocations: 0 / 0.8095 GB, free: 5.27 MB / 0.5606 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 262 * Number of variables: 262 Notification: Performance of Generate backend data structure: time 0.007074/1.047, allocations: 2.259 MB / 0.8117 GB, free: 2.938 MB / 0.5606 GB Notification: Performance of prepare preOptimizeDAE: time 4.907e-05/1.047, allocations: 8.031 kB / 0.8117 GB, free: 2.93 MB / 0.5606 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.002925/1.05, allocations: 453.4 kB / 0.8121 GB, free: 2.484 MB / 0.5606 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.00342/1.054, allocations: 1.547 MB / 0.8136 GB, free: 0.8828 MB / 0.5606 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 9.234e-05/1.054, allocations: 90.06 kB / 0.8137 GB, free: 0.793 MB / 0.5606 GB Notification: Performance of preOpt expandDerOperator (simulation): time 0.0002252/1.054, allocations: 108 kB / 0.8138 GB, free: 0.6875 MB / 0.5606 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.003019/1.057, allocations: 1.332 MB / 0.8151 GB, free: 15.29 MB / 0.5762 GB Notification: Performance of preOpt findStateOrder (simulation): time 2.65e-05/1.057, allocations: 3.938 kB / 0.8151 GB, free: 15.29 MB / 0.5762 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.0001134/1.057, allocations: 48 kB / 0.8152 GB, free: 15.24 MB / 0.5762 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 4.447e-05/1.057, allocations: 34.03 kB / 0.8152 GB, free: 15.2 MB / 0.5762 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.002373/1.06, allocations: 1.05 MB / 0.8162 GB, free: 14.14 MB / 0.5762 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 0.008063/1.068, allocations: 5.178 MB / 0.8213 GB, free: 8.613 MB / 0.5762 GB Notification: Performance of preOpt comSubExp (simulation): time 0.002285/1.07, allocations: 0.9053 MB / 0.8222 GB, free: 7.699 MB / 0.5762 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.0008133/1.071, allocations: 422.8 kB / 0.8226 GB, free: 7.285 MB / 0.5762 GB Notification: Performance of preOpt evalFunc (simulation): time 6.442e-05/1.071, allocations: 12.62 kB / 0.8226 GB, free: 7.273 MB / 0.5762 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 0.001449/1.073, allocations: 0.6151 MB / 0.8232 GB, free: 6.629 MB / 0.5762 GB Notification: Performance of preOpt simplifyInStream (simulation): time 0.0006818/1.073, allocations: 87.2 kB / 0.8233 GB, free: 6.543 MB / 0.5762 GB Notification: Performance of pre-optimization done (n=67): time 3.005e-06/1.073, allocations: 1.094 kB / 0.8233 GB, free: 6.543 MB / 0.5762 GB Notification: Performance of matching and sorting (n=67): time 0.002947/1.076, allocations: 1.18 MB / 0.8244 GB, free: 5.352 MB / 0.5762 GB Notification: Performance of inlineWhenForInitialization (initialization): time 0.0001751/1.076, allocations: 321 kB / 0.8247 GB, free: 4.965 MB / 0.5762 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.001697/1.078, allocations: 1.278 MB / 0.826 GB, free: 3.676 MB / 0.5762 GB Notification: Performance of collectPreVariables (initialization): time 0.0001102/1.078, allocations: 45.7 kB / 0.826 GB, free: 3.625 MB / 0.5762 GB Notification: Performance of collectInitialEqns (initialization): time 0.0006653/1.079, allocations: 0.7003 MB / 0.8267 GB, free: 2.918 MB / 0.5762 GB Notification: Performance of collectInitialBindings (initialization): time 0.0002186/1.079, allocations: 236.6 kB / 0.8269 GB, free: 2.684 MB / 0.5762 GB Notification: Performance of simplifyInitialFunctions (initialization): time 6.277e-05/1.079, allocations: 12 kB / 0.8269 GB, free: 2.672 MB / 0.5762 GB Notification: Performance of setup shared object (initialization): time 0.0001423/1.079, allocations: 353.8 kB / 0.8273 GB, free: 2.32 MB / 0.5762 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.001001/1.08, allocations: 477.7 kB / 0.8277 GB, free: 1.852 MB / 0.5762 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.001194/1.082, allocations: 0.7164 MB / 0.8284 GB, free: 1.043 MB / 0.5762 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.001095/1.083, allocations: 0.615 MB / 0.829 GB, free: 428 kB / 0.5762 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 4.929e-06/1.083, allocations: 0 / 0.829 GB, free: 428 kB / 0.5762 GB Notification: Performance of matching and sorting (n=116) (initialization): time 0.00272/1.085, allocations: 1.407 MB / 0.8304 GB, free: 14.99 MB / 0.5919 GB Notification: Performance of prepare postOptimizeDAE: time 0.0001894/1.086, allocations: 269.8 kB / 0.8307 GB, free: 14.67 MB / 0.5919 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 2.051e-05/1.086, allocations: 4 kB / 0.8307 GB, free: 14.66 MB / 0.5919 GB Notification: Performance of postOpt tearingSystem (initialization): time 2.177e-05/1.086, allocations: 8 kB / 0.8307 GB, free: 14.66 MB / 0.5919 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.002016/1.088, allocations: 355.4 kB / 0.831 GB, free: 14.31 MB / 0.5919 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.003504/1.091, allocations: 2.772 MB / 0.8337 GB, free: 11.28 MB / 0.5919 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.001822/1.093, allocations: 138.7 kB / 0.8339 GB, free: 11.14 MB / 0.5919 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0001417/1.093, allocations: 63.97 kB / 0.8339 GB, free: 11.08 MB / 0.5919 GB Notification: Performance of prepare postOptimizeDAE: time 1.006e-05/1.093, allocations: 6.031 kB / 0.8339 GB, free: 11.08 MB / 0.5919 GB Notification: Performance of postOpt replaceHomotopyWithSimplified (initialization): time 0.002338/1.096, allocations: 1.415 MB / 0.8353 GB, free: 9.652 MB / 0.5919 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.386e-05/1.096, allocations: 4 kB / 0.8353 GB, free: 9.648 MB / 0.5919 GB Notification: Performance of postOpt tearingSystem (initialization): time 1.151e-05/1.096, allocations: 8 kB / 0.8353 GB, free: 9.641 MB / 0.5919 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.000706/1.096, allocations: 183.9 kB / 0.8355 GB, free: 9.461 MB / 0.5919 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 1.321e-05/1.096, allocations: 15.98 kB / 0.8355 GB, free: 9.445 MB / 0.5919 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.001374/1.098, allocations: 115.7 kB / 0.8356 GB, free: 9.332 MB / 0.5919 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.000102/1.098, allocations: 47.98 kB / 0.8357 GB, free: 9.285 MB / 0.5919 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 15 * Number of states: 0 () * Number of discrete variables: 6 ($whenCondition1,$PRE.y.T_start,y.T_start,$PRE.y.count,y.count,conPID.I.local_reset) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (96): * Single equations (assignments): 90 * Array equations: 1 * Algorithm blocks: 2 * Record equations: 1 * When equations: 0 * If-equations: 0 * Equation systems (linear and non-linear blocks): 2 * Torn equation systems: 0 * Mixed (continuous/discrete) equation systems: 0 Notification: Equation system details: * Constant Jacobian: 0 * Linear Jacobian (size,density): 0 * Non-linear Jacobian: 2 {1,1} * Without analytic Jacobian: 0 Notification: Performance of prepare postOptimizeDAE: time 0.001127/1.099, allocations: 484.8 kB / 0.8361 GB, free: 8.801 MB / 0.5919 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0003872/1.099, allocations: 142.2 kB / 0.8363 GB, free: 8.66 MB / 0.5919 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.002308/1.102, allocations: 0.8917 MB / 0.8371 GB, free: 7.754 MB / 0.5919 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 1.653e-05/1.102, allocations: 7.984 kB / 0.8371 GB, free: 7.746 MB / 0.5919 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 1.09e-05/1.102, allocations: 4 kB / 0.8371 GB, free: 7.742 MB / 0.5919 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 0.001572/1.103, allocations: 0.7867 MB / 0.8379 GB, free: 6.922 MB / 0.5919 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 postOpt removeSimpleEquations (simulation): time 0.004585/1.108, allocations: 2.243 MB / 0.8401 GB, free: 4.605 MB / 0.5919 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 6.613e-06/1.108, allocations: 7.938 kB / 0.8401 GB, free: 4.598 MB / 0.5919 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.001978/1.11, allocations: 323.5 kB / 0.8404 GB, free: 4.281 MB / 0.5919 GB Notification: Performance of postOpt tearingSystem (simulation): time 2.294e-05/1.11, allocations: 4 kB / 0.8404 GB, free: 4.277 MB / 0.5919 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 7.453e-05/1.11, allocations: 15.98 kB / 0.8404 GB, free: 4.262 MB / 0.5919 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.003831/1.114, allocations: 2.744 MB / 0.8431 GB, free: 1.258 MB / 0.5919 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 4.538e-06/1.114, allocations: 0 / 0.8431 GB, free: 1.258 MB / 0.5919 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.00342/1.117, allocations: 1.377 MB / 0.8445 GB, free: 15.86 MB / 0.6075 GB Notification: Performance of postOpt removeConstants (simulation): time 0.0008681/1.118, allocations: 299.3 kB / 0.8447 GB, free: 15.54 MB / 0.6075 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.000361/1.119, allocations: 16 kB / 0.8448 GB, free: 15.53 MB / 0.6075 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.00111/1.12, allocations: 115.7 kB / 0.8449 GB, free: 15.41 MB / 0.6075 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.000193/1.12, allocations: 48.48 kB / 0.8449 GB, free: 15.37 MB / 0.6075 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 7.598e-05/1.12, allocations: 23.98 kB / 0.8449 GB, free: 15.34 MB / 0.6075 GB Notification: Performance of sorting global known variables: time 0.001731/1.122, allocations: 0.8683 MB / 0.8458 GB, free: 14.48 MB / 0.6075 GB Notification: Performance of sort global known variables: time 2.455e-06/1.122, allocations: 0 / 0.8458 GB, free: 14.48 MB / 0.6075 GB Notification: Performance of remove unused functions: time 0.002806/1.125, allocations: 0.8146 MB / 0.8466 GB, free: 13.66 MB / 0.6075 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 2 * Number of states: 6 (fan.vol.dynBal.U,fan.vol.dynBal.m,fan.vol.dynBal.mXi[1],fan.filter.x[1],fan.filter.x[2],conPID.I.y) * Number of discrete variables: 3 ($whenCondition1,y.T_start,y.count) * Number of discrete states: 1 (y.count) * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for simulation (68): * Single equations (assignments): 64 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 2 * If-equations: 0 * Equation systems (linear and non-linear blocks): 2 * Torn equation systems: 0 * Mixed (continuous/discrete) equation systems: 0 Notification: Equation system details: * Constant Jacobian: 0 * Linear Jacobian (size,density): 0 * Non-linear Jacobian: 2 {1,1} * Without analytic Jacobian: 0 Notification: Performance of Backend phase and start with SimCode phase: time 0.001052/1.126, allocations: 382.7 kB / 0.847 GB, free: 13.3 MB / 0.6075 GB Notification: Performance of simCode: created initialization part: time 0.005383/1.131, allocations: 2.728 MB / 0.8496 GB, free: 10.51 MB / 0.6075 GB Notification: Performance of simCode: created event and clocks part: time 5.912e-06/1.131, allocations: 0 / 0.8496 GB, free: 10.51 MB / 0.6075 GB Notification: Performance of simCode: created simulation system equations: time 0.002585/1.134, allocations: 0.6326 MB / 0.8502 GB, free: 9.879 MB / 0.6075 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.003733/1.137, allocations: 0.696 MB / 0.8509 GB, free: 9.195 MB / 0.6075 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.005564/1.143, allocations: 3.25 MB / 0.8541 GB, free: 5.902 MB / 0.6075 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0009737/1.144, allocations: 1.304 MB / 0.8554 GB, free: 4.57 MB / 0.6075 GB Notification: Performance of simCode: alias equations: time 0.001744/1.146, allocations: 335.4 kB / 0.8557 GB, free: 4.238 MB / 0.6075 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0003122/1.146, allocations: 115.4 kB / 0.8558 GB, free: 4.125 MB / 0.6075 GB Notification: Performance of SimCode: time 1.914e-06/1.146, allocations: 0 / 0.8558 GB, free: 4.125 MB / 0.6075 GB Notification: Performance of Templates: time 0.05993/1.206, allocations: 31.08 MB / 0.8861 GB, free: 5.363 MB / 0.6387 GB make -j1 -f Buildings_3.0.0_Buildings.Fluid.Movers.Examples.ClosedLoop_y.makefile Environment - environmentSimulation: (rm -f Buildings_3.0.0_Buildings.Fluid.Movers.Examples.ClosedLoop_y.pipe ; mkfifo Buildings_3.0.0_Buildings.Fluid.Movers.Examples.ClosedLoop_y.pipe ; head -c 1048576 < Buildings_3.0.0_Buildings.Fluid.Movers.Examples.ClosedLoop_y.pipe >> ../files/Buildings_3.0.0_Buildings.Fluid.Movers.Examples.ClosedLoop_y.sim & ./Buildings_3.0.0_Buildings.Fluid.Movers.Examples.ClosedLoop_y -abortSlowSimulation -alarm=480 -lv LOG_STATS > Buildings_3.0.0_Buildings.Fluid.Movers.Examples.ClosedLoop_y.pipe 2>&1) Environment - environmentSimulation: