Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries/ --ompython_omhome=/usr IBPSA_latest_IBPSA.Electrical.AC.ThreePhasesUnbalanced.Conversion.Examples.TransformerStepUpDY.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/IBPSA 4.0.0-master/package.mo", uses=false) Using package IBPSA with version 4.0.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/IBPSA 4.0.0-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: "" <> buildModelFMU(IBPSA.Electrical.AC.ThreePhasesUnbalanced.Conversion.Examples.TransformerStepUpDY,fileNamePrefix="IBPSA_latest_IBPSA_Electrical_AC_ThreePhasesUnbalanced_Conversion_Examples_TransformerStepUpDY",fmuType="me",version="2.0",platforms={"static"}) "" <> buildModelFMU(IBPSA.Electrical.AC.ThreePhasesUnbalanced.Conversion.Examples.TransformerStepUpDY,fileNamePrefix="IBPSA_latest_IBPSA_Electrical_AC_ThreePhasesUnbalanced_Conversion_Examples_TransformerStepUpDY",fmuType="me",version="2.0",platforms={"static"}) Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.000883/0.0008831, allocations: 88.17 kB / 15.7 MB, free: 460 kB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.0009498/0.00095, allocations: 173.9 kB / 16.58 MB, free: 6.852 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo): time 1.229/1.229, allocations: 223.2 MB / 240.6 MB, free: 5.328 MB / 190.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/IBPSA 4.0.0-master/package.mo): time 0.6247/0.6247, allocations: 113.7 MB / 405.5 MB, free: 4.531 MB / 334.1 MB Notification: Performance of FrontEnd - loaded program: time 0.0002711/0.0002711, allocations: 8 kB / 493.2 MB, free: 8.492 MB / 350.1 MB Notification: Performance of FrontEnd - Absyn->SCode: time 0.1306/0.1308, allocations: 77.11 MB / 0.5569 GB, free: 11.58 MB / 430.1 MB Notification: Performance of NFInst.instantiate(IBPSA.Electrical.AC.ThreePhasesUnbalanced.Conversion.Examples.TransformerStepUpDY): time 0.01635/0.1472, allocations: 15.4 MB / 0.5719 GB, free: 12.14 MB / 446.1 MB Notification: Performance of NFInst.instExpressions: time 0.008442/0.1557, allocations: 5.68 MB / 0.5775 GB, free: 6.438 MB / 446.1 MB Notification: Performance of NFInst.updateImplicitVariability: time 0.001153/0.1569, allocations: 39.88 kB / 0.5775 GB, free: 6.398 MB / 446.1 MB Notification: Performance of NFTyping.typeComponents: time 0.0009672/0.1579, allocations: 305.8 kB / 0.5778 GB, free: 6.098 MB / 446.1 MB Notification: Performance of NFTyping.typeBindings: time 0.00208/0.16, allocations: 0.8132 MB / 0.5786 GB, free: 5.281 MB / 446.1 MB Notification: Performance of NFTyping.typeClassSections: time 0.00171/0.1617, allocations: 0.5887 MB / 0.5792 GB, free: 4.691 MB / 446.1 MB Notification: Performance of NFFlatten.flatten: time 0.2474/0.4092, allocations: 4.986 MB / 0.5841 GB, free: 13.96 MB / 446.1 MB Notification: Performance of NFFlatten.resolveConnections: time 0.01031/0.4195, allocations: 6.3 MB / 0.5902 GB, free: 13.14 MB / 446.1 MB Notification: Performance of NFEvalConstants.evaluate: time 0.002511/0.422, allocations: 1.335 MB / 0.5915 GB, free: 13.14 MB / 446.1 MB Notification: Performance of NFSimplifyModel.simplify: time 0.003342/0.4254, allocations: 1.94 MB / 0.5934 GB, free: 13.12 MB / 446.1 MB Notification: Performance of NFPackage.collectConstants: time 0.0004691/0.4259, allocations: 195.7 kB / 0.5936 GB, free: 13.12 MB / 446.1 MB Notification: Performance of NFFlatten.collectFunctions: time 0.001627/0.4275, allocations: 0.6013 MB / 0.5942 GB, free: 13.12 MB / 446.1 MB Notification: Performance of NFScalarize.scalarize: time 0.001952/0.4295, allocations: 1.457 MB / 0.5956 GB, free: 13.12 MB / 446.1 MB Notification: Performance of NFVerifyModel.verify: time 0.0009747/0.4305, allocations: 0.5708 MB / 0.5962 GB, free: 13.09 MB / 446.1 MB Notification: Performance of NFConvertDAE.convert: time 0.006262/0.4367, allocations: 5.585 MB / 0.6016 GB, free: 12.86 MB / 446.1 MB Notification: Performance of FrontEnd - DAE generated: time 8.266e-06/0.4368, allocations: 0 / 0.6016 GB, free: 12.86 MB / 446.1 MB Notification: Performance of FrontEnd: time 2.405e-06/0.4368, allocations: 0 / 0.6016 GB, free: 12.86 MB / 446.1 MB Notification: Performance of Transformations before backend: time 0.0001554/0.4369, allocations: 1.344 kB / 0.6016 GB, free: 12.86 MB / 446.1 MB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 809 * Number of variables: 809 Notification: Performance of Generate backend data structure: time 0.006148/0.4431, allocations: 2.498 MB / 0.6041 GB, free: 11.57 MB / 446.1 MB Notification: Performance of prepare preOptimizeDAE: time 4.399e-05/0.4431, allocations: 10.09 kB / 0.6041 GB, free: 11.57 MB / 446.1 MB Notification: Performance of preOpt introduceOutputAliases (simulation): time 0.001072/0.4442, allocations: 466.8 kB / 0.6045 GB, free: 11.44 MB / 446.1 MB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.009296/0.4535, allocations: 2.023 MB / 0.6065 GB, free: 10.54 MB / 446.1 MB Notification: Performance of preOpt evaluateParameters (simulation): time 0.004001/0.4576, allocations: 1.636 MB / 0.6081 GB, free: 10.02 MB / 446.1 MB Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.0002113/0.4578, allocations: 228.9 kB / 0.6083 GB, free: 10.02 MB / 446.1 MB Notification: Performance of preOpt expandDerOperator (simulation): time 0.001211/0.459, allocations: 291.3 kB / 0.6086 GB, free: 10.02 MB / 446.1 MB Notification: Performance of preOpt clockPartitioning (simulation): time 0.01369/0.4727, allocations: 5.903 MB / 0.6143 GB, free: 8.039 MB / 446.1 MB Notification: Performance of preOpt findStateOrder (simulation): time 5.467e-05/0.4728, allocations: 3 kB / 0.6144 GB, free: 8.039 MB / 446.1 MB Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.0003835/0.4732, allocations: 127.1 kB / 0.6145 GB, free: 7.945 MB / 446.1 MB Notification: Performance of preOpt inlineArrayEqn (simulation): time 0.0002664/0.4735, allocations: 203.5 kB / 0.6147 GB, free: 7.895 MB / 446.1 MB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.01234/0.4858, allocations: 5.953 MB / 0.6205 GB, free: 4.867 MB / 446.1 MB 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 0.02508/0.5109, allocations: 22.99 MB / 0.6429 GB, free: 13.38 MB / 478.1 MB Notification: Performance of preOpt comSubExp (simulation): time 0.004553/0.5155, allocations: 2.503 MB / 0.6454 GB, free: 10.75 MB / 478.1 MB Notification: Performance of preOpt resolveLoops (simulation): time 0.00387/0.5194, allocations: 1.818 MB / 0.6472 GB, free: 8.926 MB / 478.1 MB Notification: Performance of preOpt evalFunc (simulation): time 0.0001963/0.5196, allocations: 119.4 kB / 0.6473 GB, free: 8.801 MB / 478.1 MB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 4.05e-05/0.5197, allocations: 59.5 kB / 0.6473 GB, free: 8.734 MB / 478.1 MB Notification: Performance of pre-optimization done (n=123): time 3.006e-06/0.5197, allocations: 4 kB / 0.6473 GB, free: 8.73 MB / 478.1 MB Notification: Performance of matching and sorting (n=153): time 0.03159/0.5513, allocations: 11.75 MB / 0.6588 GB, free: 12.95 MB / 494.1 MB Notification: Performance of inlineWhenForInitialization (initialization): time 0.0001056/0.5514, allocations: 226.9 kB / 0.659 GB, free: 12.68 MB / 494.1 MB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.001367/0.5528, allocations: 1.063 MB / 0.6601 GB, free: 11.6 MB / 494.1 MB Notification: Performance of collectPreVariables (initialization): time 0.0001818/0.553, allocations: 53.7 kB / 0.6601 GB, free: 11.54 MB / 494.1 MB Notification: Performance of collectInitialEqns (initialization): time 0.0007029/0.5537, allocations: 1.252 MB / 0.6613 GB, free: 10.28 MB / 494.1 MB Notification: Performance of collectInitialBindings (initialization): time 0.0004875/0.5542, allocations: 0.5237 MB / 0.6618 GB, free: 9.762 MB / 494.1 MB Notification: Performance of simplifyInitialFunctions (initialization): time 0.000151/0.5543, allocations: 44 kB / 0.6619 GB, free: 9.719 MB / 494.1 MB Notification: Performance of setup shared object (initialization): time 0.0002024/0.5545, allocations: 431.2 kB / 0.6623 GB, free: 9.289 MB / 494.1 MB Notification: Performance of preBalanceInitialSystem (initialization): time 0.003839/0.5584, allocations: 1.811 MB / 0.6641 GB, free: 7.473 MB / 494.1 MB Notification: Performance of partitionIndependentBlocks (initialization): time 0.004261/0.5627, allocations: 2.498 MB / 0.6665 GB, free: 4.668 MB / 494.1 MB Notification: Performance of analyzeInitialSystem (initialization): time 0.00416/0.5668, allocations: 2.143 MB / 0.6686 GB, free: 2.531 MB / 494.1 MB Notification: Performance of solveInitialSystemEqSystem (initialization): time 1.141e-05/0.5669, allocations: 8 kB / 0.6686 GB, free: 2.523 MB / 494.1 MB Notification: Performance of matching and sorting (n=282) (initialization): time 0.01072/0.5776, allocations: 5.173 MB / 0.6737 GB, free: 13.32 MB / 0.4981 GB Notification: Performance of prepare postOptimizeDAE: time 0.0005492/0.5782, allocations: 0.7136 MB / 0.6743 GB, free: 12.31 MB / 0.4981 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 2.915e-05/0.5782, allocations: 24 kB / 0.6744 GB, free: 12.29 MB / 0.4981 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.002531/0.5807, allocations: 0.8737 MB / 0.6752 GB, free: 11.4 MB / 0.4981 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.002973/0.5837, allocations: 0.776 MB / 0.676 GB, free: 10.62 MB / 0.4981 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.01291/0.5966, allocations: 12.79 MB / 0.6885 GB, free: 13.07 MB / 0.5137 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.002953/0.5996, allocations: 467 kB / 0.6889 GB, free: 12.62 MB / 0.5137 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0002652/0.5999, allocations: 119.9 kB / 0.689 GB, free: 12.5 MB / 0.5137 GB Notification: Performance of prepare postOptimizeDAE: time 8.266e-06/0.5999, allocations: 4 kB / 0.689 GB, free: 12.5 MB / 0.5137 GB Notification: Performance of postOpt replaceHomotopyWithSimplified (initialization): time 0.01035/0.6103, allocations: 5.009 MB / 0.6939 GB, free: 7.465 MB / 0.5137 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 4.84e-05/0.6104, allocations: 20 kB / 0.6939 GB, free: 7.445 MB / 0.5137 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.001916/0.6123, allocations: 0.7504 MB / 0.6947 GB, free: 6.68 MB / 0.5137 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.002948/0.6153, allocations: 0.7683 MB / 0.6954 GB, free: 5.91 MB / 0.5137 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.0122/0.6275, allocations: 12.61 MB / 0.7077 GB, free: 8.539 MB / 0.5294 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.002998/0.6305, allocations: 447.1 kB / 0.7082 GB, free: 8.102 MB / 0.5294 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0002676/0.6308, allocations: 112 kB / 0.7083 GB, free: 7.992 MB / 0.5294 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 97 * 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 (240): * Single equations (assignments): 234 * 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: 6 * Mixed (continuous/discrete) equation systems: 0 Notification: Torn system details for strict tearing set: * Linear torn systems: 6 {(2,100.0%) 6,(2,100.0%) 6,(2,100.0%) 6,(2,100.0%) 6,(2,100.0%) 6,(2,100.0%) 6} * Non-linear torn systems: 0 Notification: Performance of prepare postOptimizeDAE: time 0.002686/0.6335, allocations: 1.335 MB / 0.7096 GB, free: 6.645 MB / 0.5294 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0004172/0.6339, allocations: 126.5 kB / 0.7097 GB, free: 6.52 MB / 0.5294 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.01026/0.6442, allocations: 4.596 MB / 0.7142 GB, free: 1.867 MB / 0.5294 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 2.33e-05/0.6442, allocations: 19.95 kB / 0.7142 GB, free: 1.848 MB / 0.5294 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 1.365e-05/0.6443, allocations: 12 kB / 0.7142 GB, free: 1.836 MB / 0.5294 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 2.033e-05/0.6443, allocations: 11.97 kB / 0.7142 GB, free: 1.824 MB / 0.5294 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.0153/0.6596, allocations: 8.304 MB / 0.7223 GB, free: 9.344 MB / 0.545 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 1.788e-05/0.6596, allocations: 11.95 kB / 0.7223 GB, free: 9.332 MB / 0.545 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.002146/0.6618, allocations: 0.5305 MB / 0.7229 GB, free: 8.801 MB / 0.545 GB Notification: Performance of postOpt tearingSystem (simulation): time 0.001949/0.6638, allocations: 0.7035 MB / 0.7236 GB, free: 8.082 MB / 0.545 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 0.0001461/0.6639, allocations: 53.92 kB / 0.7236 GB, free: 8.031 MB / 0.545 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.01186/0.6758, allocations: 12.24 MB / 0.7356 GB, free: 11.03 MB / 0.5606 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 9.978e-06/0.6758, allocations: 15.92 kB / 0.7356 GB, free: 11.01 MB / 0.5606 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.009366/0.6852, allocations: 4.287 MB / 0.7398 GB, free: 6.602 MB / 0.5606 GB Notification: Performance of postOpt removeConstants (simulation): time 0.001045/0.6863, allocations: 0.4955 MB / 0.7402 GB, free: 6.086 MB / 0.5606 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0002322/0.6865, allocations: 40 kB / 0.7403 GB, free: 6.047 MB / 0.5606 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.00206/0.6886, allocations: 387.4 kB / 0.7407 GB, free: 5.668 MB / 0.5606 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0002795/0.6889, allocations: 136.7 kB / 0.7408 GB, free: 5.531 MB / 0.5606 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 0.0001299/0.689, allocations: 59.95 kB / 0.7408 GB, free: 5.473 MB / 0.5606 GB Notification: Performance of sorting global known variables: time 0.001033/0.6901, allocations: 0.7761 MB / 0.7416 GB, free: 4.695 MB / 0.5606 GB Notification: Performance of sort global known variables: time 2.9e-07/0.6901, allocations: 0 / 0.7416 GB, free: 4.695 MB / 0.5606 GB Notification: Performance of remove unused functions: time 0.003832/0.6939, allocations: 1.156 MB / 0.7427 GB, free: 3.539 MB / 0.5606 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 32 * 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 (107): * Single equations (assignments): 101 * 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: 6 * Mixed (continuous/discrete) equation systems: 0 Notification: Torn system details for strict tearing set: * Linear torn systems: 6 {(2,100.0%) 6,(2,100.0%) 6,(2,100.0%) 6,(2,100.0%) 6,(2,100.0%) 6,(2,100.0%) 6} * Non-linear torn systems: 0 Notification: Performance of Backend phase and start with SimCode phase: time 0.009417/0.7033, allocations: 4.892 MB / 0.7475 GB, free: 14.52 MB / 0.5762 GB Notification: Performance of simCode: created initialization part: time 0.01631/0.7197, allocations: 8.159 MB / 0.7555 GB, free: 6.223 MB / 0.5762 GB Notification: Performance of simCode: created event and clocks part: time 9.779e-06/0.7197, allocations: 0 / 0.7555 GB, free: 6.223 MB / 0.5762 GB Notification: Performance of simCode: created simulation system equations: time 0.005406/0.7251, allocations: 2.746 MB / 0.7582 GB, free: 3.402 MB / 0.5762 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.001543/0.7267, allocations: 186 kB / 0.7583 GB, free: 3.223 MB / 0.5762 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.03778/0.7645, allocations: 17.98 MB / 0.7759 GB, free: 0.5977 MB / 0.5919 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.002337/0.7669, allocations: 2.328 MB / 0.7782 GB, free: 14.23 MB / 0.6075 GB Notification: Performance of simCode: alias equations: time 0.003718/0.7706, allocations: 1.287 MB / 0.7794 GB, free: 12.94 MB / 0.6075 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.001292/0.7719, allocations: 0.8741 MB / 0.7803 GB, free: 12.06 MB / 0.6075 GB Notification: Performance of SimCode: time 8.81e-07/0.7719, allocations: 4 kB / 0.7803 GB, free: 12.06 MB / 0.6075 GB Notification: Performance of buildModelFMU: Generate the FMI files: time 0.3735/1.145, allocations: 48.41 MB / 0.8276 GB, free: 210.4 MB / 0.6387 GB Notification: Performance of buildModelFMU: configured platform static using cached values: time 0.0001551/1.146, allocations: 242.5 kB / 0.8278 GB, free: 210.1 MB / 0.6387 GB Notification: Performance of buildModelFMU: Generate platform static: time 2.558/3.703, allocations: 0.9688 kB / 0.8278 GB, free: 210.1 MB / 0.6387 GB (rm -f IBPSA_latest_IBPSA.Electrical.AC.ThreePhasesUnbalanced.Conversion.Examples.TransformerStepUpDY.pipe ; mkfifo IBPSA_latest_IBPSA.Electrical.AC.ThreePhasesUnbalanced.Conversion.Examples.TransformerStepUpDY.pipe ; head -c 1048576 < IBPSA_latest_IBPSA.Electrical.AC.ThreePhasesUnbalanced.Conversion.Examples.TransformerStepUpDY.pipe >> ../files/IBPSA_latest_IBPSA.Electrical.AC.ThreePhasesUnbalanced.Conversion.Examples.TransformerStepUpDY.sim & /home/hudson/saved_omc/OMSimulator/install/linux/bin/OMSimulator --tempDir=temp_IBPSA_latest_IBPSA_Electrical_AC_ThreePhasesUnbalanced_Conversion_Examples_TransformerStepUpDY_fmu --startTime=0 --stopTime=1 --timeout=50 --tolerance=1e-06 IBPSA_latest_IBPSA_Electrical_AC_ThreePhasesUnbalanced_Conversion_Examples_TransformerStepUpDY.fmu > IBPSA_latest_IBPSA.Electrical.AC.ThreePhasesUnbalanced.Conversion.Examples.TransformerStepUpDY.pipe 2>&1) Environment - environmentSimulation: