Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries/ --ompython_omhome=/usr BuildingSystems_BuildingSystems.Airflow.Multizone.Examples.OneOpenDoor.conf.json 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 4.0.0+maint.om/package.mo", uses=false) loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/NcDataReader2 2.5.1-master/package.mo", uses=false) loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/BuildingSystems 2.0.0-master/package.mo", uses=false) Using package BuildingSystems with version 2.0.0-beta (/home/hudson/saved_omc/libraries/.openmodelica/libraries/BuildingSystems 2.0.0-master/package.mo) Using package NcDataReader2 with version 2.5.1 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/NcDataReader2 2.5.1-master/package.mo) Using package Modelica with version 4.0.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+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) Running command: translateModel(BuildingSystems.Airflow.Multizone.Examples.OneOpenDoor,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="BuildingSystems_BuildingSystems.Airflow.Multizone.Examples.OneOpenDoor") translateModel(BuildingSystems.Airflow.Multizone.Examples.OneOpenDoor,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="BuildingSystems_BuildingSystems.Airflow.Multizone.Examples.OneOpenDoor") Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.0008624/0.0008623, allocations: 99.86 kB / 15.05 MB, free: 1.105 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.0009225/0.0009225, allocations: 177.3 kB / 15.95 MB, free: 216 kB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo): time 1.207/1.207, allocations: 223.2 MB / 239.9 MB, free: 5.434 MB / 190.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/NcDataReader2 2.5.1-master/package.mo): time 0.001629/0.001629, allocations: 266.7 kB / 291.3 MB, free: 1.988 MB / 238.1 MB [/home/hudson/saved_omc/libraries/.openmodelica/libraries/BuildingSystems 2.0.0-master/Buildings/Airvolumes/Parameter/package.mo:5:3-5:34:writable] Warning: Got element f_alp that was not referenced in the package.order file. [/home/hudson/saved_omc/libraries/.openmodelica/libraries/BuildingSystems 2.0.0-master/Buildings/Airvolumes/Parameter/package.mo:6:3-6:35:writable] Warning: Elements in the package.mo-file need to be in the same relative order as the package.order file. Got element named f_lay but it was already added because it was not the next element in the list at that time. [/home/hudson/saved_omc/libraries/.openmodelica/libraries/BuildingSystems 2.0.0-master/Buildings/Airvolumes/Parameter/package.mo:6:3-6:35:writable] Warning: Got element f_lay that was not referenced in the package.order file. [/home/hudson/saved_omc/libraries/.openmodelica/libraries/BuildingSystems 2.0.0-master/Buildings/Airvolumes/Parameter/package.mo:7:3-7:37:writable] Warning: Elements in the package.mo-file need to be in the same relative order as the package.order file. Got element named f_loss but it was already added because it was not the next element in the list at that time. [/home/hudson/saved_omc/libraries/.openmodelica/libraries/BuildingSystems 2.0.0-master/Buildings/Airvolumes/Parameter/package.mo:7:3-7:37:writable] Warning: Got element f_loss that was not referenced in the package.order file. [/home/hudson/saved_omc/libraries/.openmodelica/libraries/BuildingSystems 2.0.0-master/Buildings/Airvolumes/Parameter/package.mo:8:3-8:33:writable] Warning: Elements in the package.mo-file need to be in the same relative order as the package.order file. Got element named f_pv but it was already added because it was not the next element in the list at that time. [/home/hudson/saved_omc/libraries/.openmodelica/libraries/BuildingSystems 2.0.0-master/Buildings/Airvolumes/Parameter/package.mo:8:3-8:33:writable] Warning: Got element f_pv that was not referenced in the package.order file. [/home/hudson/saved_omc/libraries/.openmodelica/libraries/BuildingSystems 2.0.0-master/Buildings/Airvolumes/Parameter/package.mo:2:1-34:14:writable] Warning: f_pv was referenced in the package.order file, but was not found in package.mo, f_pv/package.mo or f_pv.mo. Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/BuildingSystems 2.0.0-master/package.mo): time 0.7604/0.7604, allocations: 144.6 MB / 487 MB, free: 7.164 MB / 350.1 MB Notification: Performance of FrontEnd - loaded program: time 0.0004192/0.0004192, allocations: 12.09 kB / 0.5683 GB, free: 38.35 MB / 430.1 MB Notification: Performance of FrontEnd - Absyn->SCode: time 0.1411/0.1416, allocations: 83.08 MB / 0.6494 GB, free: 3.555 MB / 446.1 MB Notification: Performance of NFInst.instantiate(BuildingSystems.Airflow.Multizone.Examples.OneOpenDoor): time 0.4432/0.5848, allocations: 141 MB / 0.7871 GB, free: 1.699 MB / 0.5606 GB Notification: Performance of NFInst.instExpressions: time 0.00994/0.5948, allocations: 7.379 MB / 0.7943 GB, free: 1.605 MB / 0.5606 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.001249/0.5961, allocations: 29.47 kB / 0.7943 GB, free: 1.605 MB / 0.5606 GB Notification: Performance of NFTyping.typeComponents: time 0.001521/0.5976, allocations: 0.5349 MB / 0.7949 GB, free: 1.602 MB / 0.5606 GB Notification: Performance of NFTyping.typeBindings: time 0.0048/0.6024, allocations: 1.553 MB / 0.7964 GB, free: 1.582 MB / 0.5606 GB Notification: Performance of NFTyping.typeClassSections: time 0.003189/0.6056, allocations: 1.001 MB / 0.7974 GB, free: 1.559 MB / 0.5606 GB Notification: Performance of NFFlatten.flatten: time 0.004/0.6096, allocations: 2.403 MB / 0.7997 GB, free: 1.547 MB / 0.5606 GB Notification: Performance of NFFlatten.resolveConnections: time 0.001385/0.611, allocations: 0.985 MB / 0.8007 GB, free: 1.457 MB / 0.5606 GB Notification: Performance of NFEvalConstants.evaluate: time 0.002209/0.6133, allocations: 1.13 MB / 0.8018 GB, free: 1.453 MB / 0.5606 GB Notification: Performance of NFSimplifyModel.simplify: time 0.001447/0.6147, allocations: 1.065 MB / 0.8028 GB, free: 1.449 MB / 0.5606 GB Notification: Performance of NFPackage.collectConstants: time 0.0002131/0.6149, allocations: 92.61 kB / 0.8029 GB, free: 1.449 MB / 0.5606 GB Notification: Performance of NFFlatten.collectFunctions: time 0.002475/0.6174, allocations: 0.8662 MB / 0.8037 GB, free: 1.445 MB / 0.5606 GB Notification: Performance of NFScalarize.scalarize: time 0.0005703/0.618, allocations: 0.5225 MB / 0.8043 GB, free: 1.438 MB / 0.5606 GB Notification: Performance of NFVerifyModel.verify: time 0.000694/0.6187, allocations: 369.3 kB / 0.8046 GB, free: 17.41 MB / 0.5762 GB Notification: Performance of NFConvertDAE.convert: time 0.002136/0.6209, allocations: 1.968 MB / 0.8065 GB, free: 17.25 MB / 0.5762 GB Notification: Performance of FrontEnd - DAE generated: time 3.256e-06/0.6209, allocations: 0 / 0.8065 GB, free: 17.25 MB / 0.5762 GB Notification: Performance of FrontEnd: time 1.813e-06/0.6209, allocations: 1.219 kB / 0.8065 GB, free: 17.25 MB / 0.5762 GB Notification: Performance of Transformations before backend: time 4.561e-05/0.6209, allocations: 4 kB / 0.8065 GB, free: 17.25 MB / 0.5762 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 385 * Number of variables: 385 Notification: Performance of Generate backend data structure: time 0.004312/0.6252, allocations: 2.017 MB / 0.8085 GB, free: 16.29 MB / 0.5762 GB Notification: Performance of prepare preOptimizeDAE: time 3.985e-05/0.6253, allocations: 12.72 kB / 0.8085 GB, free: 16.29 MB / 0.5762 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.0004156/0.6257, allocations: 194 kB / 0.8087 GB, free: 16.19 MB / 0.5762 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.001711/0.6274, allocations: 1.074 MB / 0.8098 GB, free: 15.86 MB / 0.5762 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 7.166e-05/0.6275, allocations: 113.4 kB / 0.8099 GB, free: 15.86 MB / 0.5762 GB Notification: Performance of preOpt expandDerOperator (simulation): time 0.0001939/0.6277, allocations: 156 kB / 0.81 GB, free: 15.85 MB / 0.5762 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.002535/0.6303, allocations: 1.9 MB / 0.8119 GB, free: 15.71 MB / 0.5762 GB Notification: Performance of preOpt findStateOrder (simulation): time 3.411e-05/0.6303, allocations: 13.34 kB / 0.8119 GB, free: 15.71 MB / 0.5762 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.0001264/0.6304, allocations: 60.06 kB / 0.8119 GB, free: 15.71 MB / 0.5762 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 2.265e-05/0.6305, allocations: 35.75 kB / 0.812 GB, free: 15.71 MB / 0.5762 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.00301/0.6335, allocations: 2.486 MB / 0.8144 GB, free: 15.68 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 0.006968/0.6405, allocations: 6.129 MB / 0.8204 GB, free: 13.24 MB / 0.5762 GB Notification: Performance of preOpt comSubExp (simulation): time 0.002841/0.6433, allocations: 2.792 MB / 0.8231 GB, free: 13.09 MB / 0.5762 GB Notification: Performance of preOpt evalFunc (simulation): time 0.001507/0.6448, allocations: 1.743 MB / 0.8248 GB, free: 11.2 MB / 0.5762 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 3.634e-05/0.6449, allocations: 56.84 kB / 0.8249 GB, free: 11.16 MB / 0.5762 GB Notification: Performance of pre-optimization done (n=237): time 3.857e-06/0.6449, allocations: 4 kB / 0.8249 GB, free: 11.16 MB / 0.5762 GB Notification: Performance of matching and sorting (n=237): time 0.004623/0.6495, allocations: 3.434 MB / 0.8282 GB, free: 10.38 MB / 0.5762 GB Notification: Performance of inlineWhenForInitialization (initialization): time 4.235e-05/0.6496, allocations: 84.08 kB / 0.8283 GB, free: 10.31 MB / 0.5762 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.0008817/0.6505, allocations: 0.7929 MB / 0.8291 GB, free: 10.07 MB / 0.5762 GB Notification: Performance of collectPreVariables (initialization): time 0.0001072/0.6506, allocations: 66.17 kB / 0.8291 GB, free: 10.03 MB / 0.5762 GB Notification: Performance of collectInitialEqns (initialization): time 0.0002676/0.6509, allocations: 487.1 kB / 0.8296 GB, free: 9.766 MB / 0.5762 GB Notification: Performance of collectInitialBindings (initialization): time 0.0005932/0.6515, allocations: 0.7893 MB / 0.8304 GB, free: 9.18 MB / 0.5762 GB Notification: Performance of simplifyInitialFunctions (initialization): time 8.696e-05/0.6516, allocations: 49.2 kB / 0.8304 GB, free: 9.18 MB / 0.5762 GB Notification: Performance of setup shared object (initialization): time 0.0001565/0.6517, allocations: 384.3 kB / 0.8308 GB, free: 8.852 MB / 0.5762 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.001246/0.653, allocations: 0.9015 MB / 0.8317 GB, free: 8.699 MB / 0.5762 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.001372/0.6543, allocations: 1.113 MB / 0.8328 GB, free: 8.375 MB / 0.5762 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.00136/0.6557, allocations: 1.075 MB / 0.8338 GB, free: 8.25 MB / 0.5762 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 5.38e-06/0.6557, allocations: 0 / 0.8338 GB, free: 8.25 MB / 0.5762 GB Notification: Performance of matching and sorting (n=261) (initialization): time 0.00334/0.6591, allocations: 2.443 MB / 0.8362 GB, free: 7.828 MB / 0.5762 GB Notification: Performance of prepare postOptimizeDAE: time 2.054e-05/0.6591, allocations: 6.094 kB / 0.8362 GB, free: 7.828 MB / 0.5762 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.166e-05/0.6591, allocations: 5.812 kB / 0.8362 GB, free: 7.828 MB / 0.5762 GB Notification: Performance of postOpt tearingSystem (initialization): time 2.565e-05/0.6592, allocations: 14.8 kB / 0.8362 GB, free: 7.824 MB / 0.5762 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.001507/0.6607, allocations: 436.4 kB / 0.8366 GB, free: 7.777 MB / 0.5762 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 1.939e-05/0.6607, allocations: 17.14 kB / 0.8366 GB, free: 7.773 MB / 0.5762 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.001211/0.6619, allocations: 212.8 kB / 0.8369 GB, free: 7.664 MB / 0.5762 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0001266/0.6621, allocations: 72.05 kB / 0.8369 GB, free: 7.66 MB / 0.5762 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 16 * Number of states: 0 () * Number of discrete variables: 0 () * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (261): * Single equations (assignments): 261 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (linear and non-linear blocks): 0 * Torn equation systems: 0 * Mixed (continuous/discrete) equation systems: 0 Notification: Performance of prepare postOptimizeDAE: time 0.0006653/0.6627, allocations: 445.9 kB / 0.8373 GB, free: 7.504 MB / 0.5762 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.00021/0.6629, allocations: 146.1 kB / 0.8375 GB, free: 7.426 MB / 0.5762 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.003695/0.6666, allocations: 2.745 MB / 0.8402 GB, free: 6.832 MB / 0.5762 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 1.461e-05/0.6667, allocations: 21.66 kB / 0.8402 GB, free: 6.832 MB / 0.5762 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 8.637e-06/0.6667, allocations: 0 / 0.8402 GB, free: 6.832 MB / 0.5762 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 0.002764/0.6695, allocations: 2.381 MB / 0.8425 GB, free: 6.254 MB / 0.5762 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.005345/0.6748, allocations: 4.299 MB / 0.8467 GB, free: 5.043 MB / 0.5762 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 6.683e-06/0.6748, allocations: 3.219 kB / 0.8467 GB, free: 5.043 MB / 0.5762 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.001455/0.6763, allocations: 410.6 kB / 0.8471 GB, free: 4.992 MB / 0.5762 GB Notification: Performance of postOpt tearingSystem (simulation): time 0.0004702/0.6768, allocations: 102.1 kB / 0.8472 GB, free: 4.949 MB / 0.5762 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 0.0001085/0.6769, allocations: 50.77 kB / 0.8473 GB, free: 4.945 MB / 0.5762 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.0005921/0.6775, allocations: 1.121 MB / 0.8483 GB, free: 3.887 MB / 0.5762 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 2.204e-06/0.6775, allocations: 0 / 0.8483 GB, free: 3.887 MB / 0.5762 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.005078/0.6826, allocations: 4.084 MB / 0.8523 GB, free: 3.047 MB / 0.5762 GB Notification: Performance of postOpt removeConstants (simulation): time 0.001033/0.6836, allocations: 0.493 MB / 0.8528 GB, free: 2.77 MB / 0.5762 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0002005/0.6838, allocations: 41.39 kB / 0.8529 GB, free: 2.762 MB / 0.5762 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0009286/0.6848, allocations: 115 kB / 0.853 GB, free: 2.68 MB / 0.5762 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0002381/0.685, allocations: 136.8 kB / 0.8531 GB, free: 2.562 MB / 0.5762 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 0.0001279/0.6852, allocations: 71.47 kB / 0.8532 GB, free: 2.508 MB / 0.5762 GB Notification: Performance of sorting global known variables: time 0.0007046/0.6859, allocations: 0.5573 MB / 0.8537 GB, free: 2.102 MB / 0.5762 GB Notification: Performance of sort global known variables: time 1.4e-07/0.6859, allocations: 0 / 0.8537 GB, free: 2.102 MB / 0.5762 GB Notification: Performance of remove unused functions: time 0.001736/0.6876, allocations: 0.6542 MB / 0.8543 GB, free: 1.52 MB / 0.5762 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 3 * Number of states: 8 (dooOpe.mExcAB,dooOpe.mExcBA,volA.dynBal.U,volA.dynBal.m,volB.dynBal.U,volB.dynBal.m,dooOpeClo.mExcAB,dooOpeClo.mExcBA) * Number of discrete variables: 0 () * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for simulation (237): * Single equations (assignments): 235 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (linear and non-linear blocks): 0 * Torn equation systems: 2 * Mixed (continuous/discrete) equation systems: 0 Notification: Torn system details for strict tearing set: * Linear torn systems: 0 * Non-linear torn systems: 2 {1 2,1 2} Notification: Performance of Backend phase and start with SimCode phase: time 0.0007043/0.6883, allocations: 391.7 kB / 0.8547 GB, free: 1.207 MB / 0.5762 GB Notification: Performance of simCode: created initialization part: time 0.003141/0.6915, allocations: 2.309 MB / 0.857 GB, free: 15.59 MB / 0.5919 GB Notification: Performance of simCode: created event and clocks part: time 3.687e-06/0.6915, allocations: 0 / 0.857 GB, free: 15.59 MB / 0.5919 GB Notification: Performance of simCode: created simulation system equations: time 0.001776/0.6933, allocations: 1.279 MB / 0.8582 GB, free: 14.71 MB / 0.5919 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.002134/0.6954, allocations: 0.5083 MB / 0.8587 GB, free: 14.32 MB / 0.5919 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.005388/0.7008, allocations: 4.517 MB / 0.8631 GB, free: 10.3 MB / 0.5919 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0008353/0.7017, allocations: 1.369 MB / 0.8645 GB, free: 8.945 MB / 0.5919 GB Notification: Performance of simCode: alias equations: time 0.001878/0.7036, allocations: 0.7268 MB / 0.8652 GB, free: 8.211 MB / 0.5919 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0004403/0.704, allocations: 162.8 kB / 0.8653 GB, free: 8.062 MB / 0.5919 GB Notification: Performance of SimCode: time 7.62e-07/0.704, allocations: 0 / 0.8653 GB, free: 8.062 MB / 0.5919 GB Notification: Performance of Templates: time 0.03689/0.7409, allocations: 25.98 MB / 0.8907 GB, free: 14.52 MB / 0.6231 GB make -j1 -f BuildingSystems_BuildingSystems.Airflow.Multizone.Examples.OneOpenDoor.makefile Environment - environmentSimulation: (rm -f BuildingSystems_BuildingSystems.Airflow.Multizone.Examples.OneOpenDoor.pipe ; mkfifo BuildingSystems_BuildingSystems.Airflow.Multizone.Examples.OneOpenDoor.pipe ; head -c 1048576 < BuildingSystems_BuildingSystems.Airflow.Multizone.Examples.OneOpenDoor.pipe >> ../files/BuildingSystems_BuildingSystems.Airflow.Multizone.Examples.OneOpenDoor.sim & ./BuildingSystems_BuildingSystems.Airflow.Multizone.Examples.OneOpenDoor -abortSlowSimulation -alarm=480 -lv LOG_STATS > BuildingSystems_BuildingSystems.Airflow.Multizone.Examples.OneOpenDoor.pipe 2>&1) Environment - environmentSimulation: