Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries/ --ompython_omhome=/usr Buildings_3.0.0_Buildings.Electrical.AC.ThreePhasesUnbalanced.Validation.IEEETests.Test4NodesFeeder.UnbalancedStepUp.DY.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.Electrical.AC.ThreePhasesUnbalanced.Validation.IEEETests.Test4NodesFeeder.UnbalancedStepUp.DY,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="Buildings_3.0.0_Buildings.Electrical.AC.ThreePhasesUnbalanced.Validation.IEEETests.Test4NodesFeeder.UnbalancedStepUp.DY") translateModel(Buildings.Electrical.AC.ThreePhasesUnbalanced.Validation.IEEETests.Test4NodesFeeder.UnbalancedStepUp.DY,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="Buildings_3.0.0_Buildings.Electrical.AC.ThreePhasesUnbalanced.Validation.IEEETests.Test4NodesFeeder.UnbalancedStepUp.DY") [/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 0.1795/0.1802, allocations: 82.22 MB / 0.5941 GB, free: 5.562 MB / 446.1 MB Notification: Performance of NFInst.instantiate(Buildings.Electrical.AC.ThreePhasesUnbalanced.Validation.IEEETests.Test4NodesFeeder.UnbalancedStepUp.DY): time 0.02001/0.2002, allocations: 17.34 MB / 0.6111 GB, free: 4.152 MB / 462.1 MB Notification: Performance of NFInst.instExpressions: time 0.01302/0.2133, allocations: 6.966 MB / 0.6179 GB, free: 13.17 MB / 478.1 MB Notification: Performance of NFInst.updateImplicitVariability: time 0.002431/0.2158, allocations: 43.88 kB / 0.6179 GB, free: 13.12 MB / 478.1 MB Notification: Performance of NFTyping.typeComponents: time 0.001393/0.2172, allocations: 393.2 kB / 0.6183 GB, free: 12.74 MB / 478.1 MB Notification: Performance of NFTyping.typeBindings: time 0.004393/0.2216, allocations: 1.374 MB / 0.6196 GB, free: 11.36 MB / 478.1 MB Notification: Performance of NFTyping.typeClassSections: time 0.003295/0.2249, allocations: 1.009 MB / 0.6206 GB, free: 10.35 MB / 478.1 MB Notification: Performance of NFFlatten.flatten: time 0.01041/0.2353, allocations: 8.702 MB / 0.6291 GB, free: 1.633 MB / 478.1 MB Notification: Performance of NFFlatten.resolveConnections: time 0.01444/0.2498, allocations: 8.89 MB / 0.6378 GB, free: 8.645 MB / 494.1 MB Notification: Performance of NFEvalConstants.evaluate: time 0.003649/0.2535, allocations: 1.685 MB / 0.6395 GB, free: 6.953 MB / 494.1 MB Notification: Performance of NFSimplifyModel.simplify: time 0.005618/0.2592, allocations: 2.749 MB / 0.6421 GB, free: 4.195 MB / 494.1 MB Notification: Performance of NFPackage.collectConstants: time 0.001182/0.2604, allocations: 244 kB / 0.6424 GB, free: 3.957 MB / 494.1 MB Notification: Performance of NFFlatten.collectFunctions: time 0.003156/0.2636, allocations: 1.182 MB / 0.6435 GB, free: 2.773 MB / 494.1 MB Notification: Performance of NFScalarize.scalarize: time 0.003014/0.2666, allocations: 1.898 MB / 0.6454 GB, free: 0.8711 MB / 494.1 MB Notification: Performance of NFVerifyModel.verify: time 0.004485/0.2711, allocations: 1.821 MB / 0.6472 GB, free: 15.04 MB / 0.4981 GB Notification: Performance of NFConvertDAE.convert: time 0.01234/0.2835, allocations: 7.679 MB / 0.6547 GB, free: 7.332 MB / 0.4981 GB Notification: Performance of FrontEnd - DAE generated: time 5.169e-06/0.2835, allocations: 0 / 0.6547 GB, free: 7.332 MB / 0.4981 GB Notification: Performance of FrontEnd: time 2.425e-06/0.2835, allocations: 0 / 0.6547 GB, free: 7.332 MB / 0.4981 GB Notification: Performance of Transformations before backend: time 0.0002627/0.2838, allocations: 4 kB / 0.6547 GB, free: 7.328 MB / 0.4981 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 1031 * Number of variables: 1031 Notification: Performance of Generate backend data structure: time 0.009139/0.293, allocations: 3.168 MB / 0.6578 GB, free: 4.098 MB / 0.4981 GB Notification: Performance of prepare preOptimizeDAE: time 5.297e-05/0.293, allocations: 8.031 kB / 0.6578 GB, free: 4.09 MB / 0.4981 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.01341/0.3064, allocations: 2.356 MB / 0.6601 GB, free: 1.727 MB / 0.4981 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.005832/0.3123, allocations: 2.217 MB / 0.6622 GB, free: 15.46 MB / 0.5137 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.0002629/0.3126, allocations: 275.4 kB / 0.6625 GB, free: 15.2 MB / 0.5137 GB Notification: Performance of preOpt expandDerOperator (simulation): time 0.001662/0.3143, allocations: 367.9 kB / 0.6628 GB, free: 14.84 MB / 0.5137 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.01938/0.3337, allocations: 7.356 MB / 0.67 GB, free: 7.359 MB / 0.5137 GB Notification: Performance of preOpt findStateOrder (simulation): time 0.0001004/0.3338, allocations: 3.938 kB / 0.67 GB, free: 7.355 MB / 0.5137 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.0005961/0.3344, allocations: 152 kB / 0.6702 GB, free: 7.207 MB / 0.5137 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 0.0005179/0.3349, allocations: 334.4 kB / 0.6705 GB, free: 6.879 MB / 0.5137 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.02536/0.3603, allocations: 7.142 MB / 0.6775 GB, free: 15.72 MB / 0.5294 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 0.477/0.8374, allocations: 22.18 MB / 0.6991 GB, free: 79.85 MB / 0.5294 GB Notification: Performance of preOpt comSubExp (simulation): time 0.008269/0.8457, allocations: 4.318 MB / 0.7034 GB, free: 78.78 MB / 0.5294 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.006209/0.852, allocations: 2.405 MB / 0.7057 GB, free: 78.72 MB / 0.5294 GB Notification: Performance of preOpt evalFunc (simulation): time 0.0003219/0.8523, allocations: 132.8 kB / 0.7058 GB, free: 78.62 MB / 0.5294 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 4.868e-05/0.8524, allocations: 62.64 kB / 0.7059 GB, free: 78.58 MB / 0.5294 GB Notification: Performance of pre-optimization done (n=198): time 5.49e-06/0.8524, allocations: 5.625 kB / 0.7059 GB, free: 78.58 MB / 0.5294 GB Notification: Performance of matching and sorting (n=257): time 0.09216/0.9446, allocations: 26.07 MB / 0.7314 GB, free: 69.69 MB / 0.5294 GB Notification: Performance of inlineWhenForInitialization (initialization): time 9.81e-05/0.9447, allocations: 236.9 kB / 0.7316 GB, free: 69.43 MB / 0.5294 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.002315/0.947, allocations: 1.465 MB / 0.733 GB, free: 68.65 MB / 0.5294 GB Notification: Performance of collectPreVariables (initialization): time 0.0005905/0.9476, allocations: 65.11 kB / 0.7331 GB, free: 68.59 MB / 0.5294 GB Notification: Performance of collectInitialEqns (initialization): time 0.0008052/0.9484, allocations: 1.55 MB / 0.7346 GB, free: 67.23 MB / 0.5294 GB Notification: Performance of collectInitialBindings (initialization): time 0.0009297/0.9494, allocations: 0.8722 MB / 0.7354 GB, free: 66.48 MB / 0.5294 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.0003952/0.9498, allocations: 249 kB / 0.7357 GB, free: 66.33 MB / 0.5294 GB Notification: Performance of setup shared object (initialization): time 6.182e-05/0.9499, allocations: 312.7 kB / 0.736 GB, free: 66.02 MB / 0.5294 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.005195/0.9551, allocations: 2.628 MB / 0.7385 GB, free: 64.49 MB / 0.5294 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.005798/0.9609, allocations: 3.54 MB / 0.742 GB, free: 60.57 MB / 0.5294 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.01084/0.9718, allocations: 6.352 MB / 0.7482 GB, free: 53.81 MB / 0.5294 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 2.774e-05/0.9718, allocations: 8 kB / 0.7482 GB, free: 53.8 MB / 0.5294 GB Notification: Performance of matching and sorting (n=398) (initialization): time 0.02468/0.9965, allocations: 10.36 MB / 0.7583 GB, free: 43.38 MB / 0.5294 GB Notification: Performance of prepare postOptimizeDAE: time 0.0005277/0.9971, allocations: 0.8826 MB / 0.7592 GB, free: 42.12 MB / 0.5294 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 4.176e-05/0.9972, allocations: 28 kB / 0.7592 GB, free: 42.09 MB / 0.5294 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.02079/1.018, allocations: 5.665 MB / 0.7647 GB, free: 36.41 MB / 0.5294 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.004294/1.022, allocations: 0.9906 MB / 0.7657 GB, free: 35.42 MB / 0.5294 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.03681/1.059, allocations: 22.74 MB / 0.7879 GB, free: 12.44 MB / 0.5294 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.004659/1.064, allocations: 0.538 MB / 0.7885 GB, free: 11.9 MB / 0.5294 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0005663/1.064, allocations: 147.9 kB / 0.7886 GB, free: 11.76 MB / 0.5294 GB Notification: Performance of prepare postOptimizeDAE: time 1.725e-05/1.064, allocations: 4 kB / 0.7886 GB, free: 11.75 MB / 0.5294 GB Notification: Performance of postOpt replaceHomotopyWithSimplified (initialization): time 0.02139/1.086, allocations: 8.659 MB / 0.7971 GB, free: 3.047 MB / 0.5294 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 0.0001147/1.086, allocations: 30.52 kB / 0.7971 GB, free: 3.02 MB / 0.5294 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.0137/1.1, allocations: 3.629 MB / 0.8006 GB, free: 15.39 MB / 0.545 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.005397/1.105, allocations: 1.115 MB / 0.8017 GB, free: 14.27 MB / 0.545 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.02788/1.133, allocations: 12.61 MB / 0.814 GB, free: 1.523 MB / 0.545 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.004968/1.138, allocations: 0.5147 MB / 0.8145 GB, free: 1.008 MB / 0.545 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.001025/1.139, allocations: 149.2 kB / 0.8147 GB, free: 0.8633 MB / 0.545 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 121 * 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 (304): * Single equations (assignments): 302 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 0 * Torn equation systems: 2 * Mixed (continuous/discrete) equation systems: 0 Notification: Torn system details for strict tearing set: * Linear torn systems (#iteration vars, #inner vars, density): 1 system {(6,42,100.0%)} * Non-linear torn systems (#iteration vars, #inner vars): 1 system {(8,40)} Notification: Performance of prepare postOptimizeDAE: time 0.004835/1.144, allocations: 1.64 MB / 0.8163 GB, free: 15.21 MB / 0.5606 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0009499/1.145, allocations: 189.7 kB / 0.8165 GB, free: 15.02 MB / 0.5606 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.0288/1.174, allocations: 9.959 MB / 0.8262 GB, free: 5.012 MB / 0.5606 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 6.067e-05/1.174, allocations: 31.94 kB / 0.8262 GB, free: 4.98 MB / 0.5606 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 3.057e-05/1.174, allocations: 12 kB / 0.8262 GB, free: 4.969 MB / 0.5606 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 7.625e-05/1.174, allocations: 15.95 kB / 0.8262 GB, free: 4.953 MB / 0.5606 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.03749/1.212, allocations: 15.53 MB / 0.8414 GB, free: 5.289 MB / 0.5762 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 5.424e-05/1.212, allocations: 8 kB / 0.8414 GB, free: 5.281 MB / 0.5762 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.003754/1.216, allocations: 0.7378 MB / 0.8421 GB, free: 4.543 MB / 0.5762 GB Notification: Performance of postOpt tearingSystem (simulation): time 0.02086/1.236, allocations: 5.301 MB / 0.8473 GB, free: 15.23 MB / 0.5919 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 0.0007668/1.237, allocations: 71.95 kB / 0.8474 GB, free: 15.16 MB / 0.5919 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.03884/1.276, allocations: 21.75 MB / 0.8686 GB, free: 9.137 MB / 0.6075 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 1.43e-05/1.276, allocations: 15.94 kB / 0.8686 GB, free: 9.121 MB / 0.6075 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.02602/1.302, allocations: 9.478 MB / 0.8779 GB, free: 15.45 MB / 0.6231 GB Notification: Performance of postOpt removeConstants (simulation): time 0.0023/1.305, allocations: 0.7211 MB / 0.8786 GB, free: 14.7 MB / 0.6231 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0005992/1.305, allocations: 59.98 kB / 0.8787 GB, free: 14.64 MB / 0.6231 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.003603/1.309, allocations: 0.4897 MB / 0.8791 GB, free: 14.16 MB / 0.6231 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0008888/1.31, allocations: 222.3 kB / 0.8793 GB, free: 13.94 MB / 0.6231 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 0.0002975/1.31, allocations: 87.95 kB / 0.8794 GB, free: 13.85 MB / 0.6231 GB Notification: Performance of sorting global known variables: time 0.001497/1.311, allocations: 1.025 MB / 0.8804 GB, free: 12.82 MB / 0.6231 GB Notification: Performance of sort global known variables: time 1.41e-07/1.312, allocations: 8 kB / 0.8804 GB, free: 12.82 MB / 0.6231 GB Notification: Performance of remove unused functions: time 0.006358/1.318, allocations: 1.734 MB / 0.8821 GB, free: 11.08 MB / 0.6231 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 40 * 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 simulation (162): * Single equations (assignments): 160 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 0 * Torn equation systems: 2 * Mixed (continuous/discrete) equation systems: 0 Notification: Torn system details for strict tearing set: * Linear torn systems (#iteration vars, #inner vars, density): 1 system {(6,42,100.0%)} * Non-linear torn systems (#iteration vars, #inner vars): 1 system {(6,42)} Notification: Performance of Backend phase and start with SimCode phase: time 0.0005026/1.318, allocations: 177.4 kB / 0.8823 GB, free: 10.9 MB / 0.6231 GB Notification: Performance of simCode: created initialization part: time 0.02983/1.348, allocations: 11.75 MB / 0.8938 GB, free: 15.1 MB / 0.6387 GB Notification: Performance of simCode: created event and clocks part: time 1.633e-05/1.348, allocations: 0 / 0.8938 GB, free: 15.1 MB / 0.6387 GB Notification: Performance of simCode: created simulation system equations: time 0.0117/1.36, allocations: 4.288 MB / 0.898 GB, free: 10.78 MB / 0.6387 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.004036/1.364, allocations: 292 kB / 0.8982 GB, free: 10.5 MB / 0.6387 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.0255/1.39, allocations: 11.35 MB / 0.9093 GB, free: 15.01 MB / 0.6544 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.003815/1.394, allocations: 2.879 MB / 0.9121 GB, free: 12.1 MB / 0.6544 GB Notification: Performance of simCode: alias equations: time 0.005623/1.399, allocations: 1.691 MB / 0.9138 GB, free: 10.4 MB / 0.6544 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.000681/1.4, allocations: 171.3 kB / 0.914 GB, free: 10.23 MB / 0.6544 GB Notification: Performance of SimCode: time 1.553e-06/1.4, allocations: 0 / 0.914 GB, free: 10.23 MB / 0.6544 GB Notification: Performance of Templates: time 0.4664/1.866, allocations: 68.85 MB / 0.9812 GB, free: 221.4 MB / 0.6856 GB make -j1 -f Buildings_3.0.0_Buildings.Electrical.AC.ThreePhasesUnbalanced.Validation.IEEETests.Test4NodesFeeder.UnbalancedStepUp.DY.makefile Environment - environmentSimulation: (rm -f Buildings_3.0.0_Buildings.Electrical.AC.ThreePhasesUnbalanced.Validation.IEEETests.Test4NodesFeeder.UnbalancedStepUp.DY.pipe ; mkfifo Buildings_3.0.0_Buildings.Electrical.AC.ThreePhasesUnbalanced.Validation.IEEETests.Test4NodesFeeder.UnbalancedStepUp.DY.pipe ; head -c 1048576 < Buildings_3.0.0_Buildings.Electrical.AC.ThreePhasesUnbalanced.Validation.IEEETests.Test4NodesFeeder.UnbalancedStepUp.DY.pipe >> ../files/Buildings_3.0.0_Buildings.Electrical.AC.ThreePhasesUnbalanced.Validation.IEEETests.Test4NodesFeeder.UnbalancedStepUp.DY.sim & ./Buildings_3.0.0_Buildings.Electrical.AC.ThreePhasesUnbalanced.Validation.IEEETests.Test4NodesFeeder.UnbalancedStepUp.DY -abortSlowSimulation -alarm=480 -lv LOG_STATS > Buildings_3.0.0_Buildings.Electrical.AC.ThreePhasesUnbalanced.Validation.IEEETests.Test4NodesFeeder.UnbalancedStepUp.DY.pipe 2>&1) Environment - environmentSimulation: