Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries/ --ompython_omhome=/usr OpenIPSL_dev_OpenIPSL.Examples.TwoAreas.Two_Areas_PSAT.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/Modelica 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/OpenIPSL 3.1.0-master/package.mo", uses=false) Using package OpenIPSL with version 3.1.0-dev (/home/hudson/saved_omc/libraries/.openmodelica/libraries/OpenIPSL 3.1.0-master/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 Modelica with version 4.0.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 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(OpenIPSL.Examples.TwoAreas.Two_Areas_PSAT,fileNamePrefix="OpenIPSL_dev_OpenIPSL_Examples_TwoAreas_Two_Areas_PSAT",fmuType="me",version="2.0",platforms={"static"}) "" <> buildModelFMU(OpenIPSL.Examples.TwoAreas.Two_Areas_PSAT,fileNamePrefix="OpenIPSL_dev_OpenIPSL_Examples_TwoAreas_Two_Areas_PSAT",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 0.0009277/0.0009275, allocations: 99.55 kB / 15.05 MB, free: 1.105 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo): time 1.28/1.28, allocations: 223.2 MB / 238.9 MB, free: 5.473 MB / 190.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.001083/0.001083, allocations: 189 kB / 290.2 MB, free: 2.164 MB / 238.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/OpenIPSL 3.1.0-master/package.mo): time 0.4635/0.4635, allocations: 79.45 MB / 420.7 MB, free: 3.965 MB / 286.1 MB Notification: Performance of FrontEnd - loaded program: time 0.0003585/0.0003585, allocations: 11.94 kB / 0.4891 GB, free: 5.484 MB / 366.1 MB Notification: Performance of FrontEnd - Absyn->SCode: time 0.3101/0.3105, allocations: 69.51 MB / 0.557 GB, free: 37.53 MB / 430.1 MB Notification: Performance of NFInst.instantiate(OpenIPSL.Examples.TwoAreas.Two_Areas_PSAT): time 0.009024/0.3195, allocations: 12.4 MB / 0.5691 GB, free: 34.56 MB / 430.1 MB Notification: Performance of NFInst.instExpressions: time 0.006915/0.3265, allocations: 4.161 MB / 0.5731 GB, free: 31.55 MB / 430.1 MB Notification: Performance of NFInst.updateImplicitVariability: time 0.002272/0.3288, allocations: 30.06 kB / 0.5732 GB, free: 31.54 MB / 430.1 MB Notification: Performance of NFTyping.typeComponents: time 0.001684/0.3305, allocations: 492.6 kB / 0.5736 GB, free: 31.35 MB / 430.1 MB Notification: Performance of NFTyping.typeBindings: time 0.004039/0.3345, allocations: 1.455 MB / 0.575 GB, free: 30.36 MB / 430.1 MB Notification: Performance of NFTyping.typeClassSections: time 0.002159/0.3367, allocations: 1.009 MB / 0.576 GB, free: 29.9 MB / 430.1 MB Notification: Performance of NFFlatten.flatten: time 0.00363/0.3403, allocations: 2.506 MB / 0.5785 GB, free: 28.51 MB / 430.1 MB Notification: Performance of NFFlatten.resolveConnections: time 0.0008349/0.3412, allocations: 0.6365 MB / 0.5791 GB, free: 28.26 MB / 430.1 MB Notification: Performance of NFEvalConstants.evaluate: time 0.00153/0.3427, allocations: 1.349 MB / 0.5804 GB, free: 27.65 MB / 430.1 MB Notification: Performance of NFSimplifyModel.simplify: time 0.00181/0.3446, allocations: 1.811 MB / 0.5822 GB, free: 26.88 MB / 430.1 MB Notification: Performance of NFPackage.collectConstants: time 0.000402/0.345, allocations: 171.2 kB / 0.5824 GB, free: 26.87 MB / 430.1 MB Notification: Performance of NFFlatten.collectFunctions: time 0.0007337/0.3457, allocations: 287.1 kB / 0.5826 GB, free: 26.84 MB / 430.1 MB Notification: Performance of NFScalarize.scalarize: time 0.0003875/0.3461, allocations: 0.614 MB / 0.5832 GB, free: 26.48 MB / 430.1 MB Notification: Performance of NFVerifyModel.verify: time 0.0004904/0.3466, allocations: 0.5411 MB / 0.5838 GB, free: 26.14 MB / 430.1 MB Notification: Performance of NFConvertDAE.convert: time 0.002996/0.3496, allocations: 3.403 MB / 0.5871 GB, free: 25.23 MB / 430.1 MB Notification: Performance of FrontEnd - DAE generated: time 5.1e-06/0.3496, allocations: 0 / 0.5871 GB, free: 25.23 MB / 430.1 MB Notification: Performance of FrontEnd: time 3.066e-06/0.3497, allocations: 0 / 0.5871 GB, free: 25.23 MB / 430.1 MB Notification: Performance of Transformations before backend: time 0.0002561/0.3499, allocations: 0 / 0.5871 GB, free: 25.23 MB / 430.1 MB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 451 * Number of variables: 451 Notification: Performance of Generate backend data structure: time 0.02014/0.3701, allocations: 5.337 MB / 0.5923 GB, free: 23.12 MB / 430.1 MB Notification: Performance of prepare preOptimizeDAE: time 4.318e-05/0.3701, allocations: 9.75 kB / 0.5923 GB, free: 23.12 MB / 430.1 MB Notification: Performance of preOpt introduceOutputAliases (simulation): time 0.0008744/0.371, allocations: 257 kB / 0.5925 GB, free: 22.96 MB / 430.1 MB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.0142/0.3852, allocations: 2.058 MB / 0.5946 GB, free: 22.56 MB / 430.1 MB Notification: Performance of preOpt evaluateParameters (simulation): time 0.00493/0.3902, allocations: 1.919 MB / 0.5964 GB, free: 21.38 MB / 430.1 MB Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.0004613/0.3907, allocations: 456.2 kB / 0.5969 GB, free: 21.03 MB / 430.1 MB Notification: Performance of preOpt expandDerOperator (simulation): time 0.0005407/0.3912, allocations: 195 kB / 0.597 GB, free: 20.96 MB / 430.1 MB Notification: Performance of preOpt clockPartitioning (simulation): time 0.005185/0.3964, allocations: 2.396 MB / 0.5994 GB, free: 20.07 MB / 430.1 MB Notification: Performance of preOpt findStateOrder (simulation): time 3.303e-05/0.3965, allocations: 0 / 0.5994 GB, free: 20.07 MB / 430.1 MB Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.0002052/0.3967, allocations: 70.09 kB / 0.5995 GB, free: 20.02 MB / 430.1 MB Notification: Performance of preOpt inlineArrayEqn (simulation): time 3.733e-05/0.3967, allocations: 44.25 kB / 0.5995 GB, free: 20.02 MB / 430.1 MB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.004964/0.4017, allocations: 2.419 MB / 0.6019 GB, free: 19.18 MB / 430.1 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 0.01865/0.4204, allocations: 10.26 MB / 0.6119 GB, free: 13.02 MB / 430.1 MB Notification: Performance of preOpt comSubExp (simulation): time 0.01047/0.4309, allocations: 4.755 MB / 0.6165 GB, free: 10.91 MB / 430.1 MB Notification: Performance of preOpt evalFunc (simulation): time 0.000408/0.4313, allocations: 43.02 kB / 0.6166 GB, free: 10.89 MB / 430.1 MB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 2.984e-05/0.4314, allocations: 57.06 kB / 0.6166 GB, free: 10.84 MB / 430.1 MB Notification: Performance of pre-optimization done (n=223): time 3.997e-06/0.4314, allocations: 0 / 0.6166 GB, free: 10.84 MB / 430.1 MB Notification: Performance of matching and sorting (n=223): time 0.09179/0.5232, allocations: 23.13 MB / 0.6392 GB, free: 8.023 MB / 446.1 MB Notification: Performance of inlineWhenForInitialization (initialization): time 5.205e-05/0.5233, allocations: 73.41 kB / 0.6393 GB, free: 7.941 MB / 446.1 MB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.00433/0.5276, allocations: 2.669 MB / 0.6419 GB, free: 5.258 MB / 446.1 MB Notification: Performance of collectPreVariables (initialization): time 0.0007919/0.5284, allocations: 65.7 kB / 0.6419 GB, free: 5.188 MB / 446.1 MB Notification: Performance of collectInitialEqns (initialization): time 0.001126/0.5295, allocations: 1.173 MB / 0.6431 GB, free: 4.004 MB / 446.1 MB Notification: Performance of collectInitialBindings (initialization): time 0.001632/0.5312, allocations: 0.8088 MB / 0.6439 GB, free: 3.184 MB / 446.1 MB Notification: Performance of simplifyInitialFunctions (initialization): time 0.0002697/0.5315, allocations: 68 kB / 0.6439 GB, free: 3.117 MB / 446.1 MB Notification: Performance of setup shared object (initialization): time 0.0003001/0.5318, allocations: 429 kB / 0.6444 GB, free: 2.691 MB / 446.1 MB Notification: Performance of preBalanceInitialSystem (initialization): time 0.003858/0.5356, allocations: 1.896 MB / 0.6462 GB, free: 0.793 MB / 446.1 MB Notification: Performance of partitionIndependentBlocks (initialization): time 0.003971/0.5396, allocations: 2.24 MB / 0.6484 GB, free: 14.47 MB / 462.1 MB Notification: Performance of analyzeInitialSystem (initialization): time 0.004183/0.5438, allocations: 2.088 MB / 0.6504 GB, free: 12.37 MB / 462.1 MB Notification: Performance of solveInitialSystemEqSystem (initialization): time 1.067e-05/0.5438, allocations: 0 / 0.6504 GB, free: 12.37 MB / 462.1 MB Notification: Performance of matching and sorting (n=429) (initialization): time 0.0235/0.5673, allocations: 8.387 MB / 0.6586 GB, free: 3.898 MB / 462.1 MB Notification: Performance of prepare postOptimizeDAE: time 3.285e-05/0.5674, allocations: 4 kB / 0.6586 GB, free: 3.895 MB / 462.1 MB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 2.395e-05/0.5675, allocations: 12.55 kB / 0.6586 GB, free: 3.883 MB / 462.1 MB Notification: Performance of postOpt tearingSystem (initialization): time 0.01549/0.583, allocations: 3.877 MB / 0.6624 GB, free: 15.96 MB / 478.1 MB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.008136/0.5911, allocations: 1.757 MB / 0.6641 GB, free: 14.2 MB / 478.1 MB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.03213/0.6233, allocations: 19.64 MB / 0.6833 GB, free: 9.637 MB / 494.1 MB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.004985/0.6283, allocations: 453.2 kB / 0.6838 GB, free: 9.191 MB / 494.1 MB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0003578/0.6287, allocations: 121 kB / 0.6839 GB, free: 9.074 MB / 494.1 MB Warning: Assuming fixed start value for the following 8 variables: g4.order6_1.w:VARIABLE(flow=false start = 1.0 fixed = true ) "Rotor speed [pu]" type: Real g3.order6_1.w:VARIABLE(flow=false start = 1.0 fixed = true ) "Rotor speed [pu]" type: Real g2.order6_1.w:VARIABLE(flow=false start = 1.0 fixed = true ) "Rotor speed [pu]" type: Real g1.order6_1.w:VARIABLE(flow=false start = 1.0 fixed = true ) "Rotor speed [pu]" type: Real g4.order6_1.e2d:VARIABLE(start = g4.order6_1.e2d0 unit = "1" fixed = true ) "d-axis sub-transient voltage" type: Real g4.order6_1.delta:VARIABLE(flow=false start = g4.order6_1.delta0 unit = "rad" fixed = true ) "Rotor angle" type: Real g3.order6_1.e2d:VARIABLE(start = g3.order6_1.e2d0 unit = "1" fixed = true ) "d-axis sub-transient voltage" type: Real g3.order6_1.delta:VARIABLE(flow=false start = g3.order6_1.delta0 unit = "rad" fixed = true ) "Rotor angle" type: Real Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 27 * 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 (359): * Single equations (assignments): 343 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (linear and non-linear blocks): 9 * Torn equation systems: 7 * Mixed (continuous/discrete) equation systems: 0 Notification: Equation system details: * Constant Jacobian: 0 * Linear Jacobian (size,density): 9 {(2,100.0%),(2,100.0%),(2,100.0%),(2,100.0%),(2,100.0%),(2,100.0%),(2,100.0%),(2,100.0%),(2,100.0%)} * Non-linear Jacobian: 0 * Without analytic Jacobian: 0 Notification: Torn system details for strict tearing set: * Linear torn systems: 6 {(4,75.0%) 2,(4,75.0%) 2,(1,100.0%) 1,(3,88.9%) 17,(1,100.0%) 1,(1,100.0%) 1} * Non-linear torn systems: 1 {8 22} Notification: Performance of prepare postOptimizeDAE: time 0.001372/0.6301, allocations: 0.4997 MB / 0.6844 GB, free: 8.574 MB / 494.1 MB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0006197/0.6307, allocations: 304.2 kB / 0.6846 GB, free: 8.273 MB / 494.1 MB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.02755/0.6583, allocations: 9.654 MB / 0.6941 GB, free: 14.6 MB / 0.4981 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 2.59e-05/0.6583, allocations: 20 kB / 0.6941 GB, free: 14.58 MB / 0.4981 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 5.801e-06/0.6583, allocations: 5.188 kB / 0.6941 GB, free: 14.57 MB / 0.4981 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 6.302e-05/0.6584, allocations: 11.95 kB / 0.6941 GB, free: 14.56 MB / 0.4981 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 0.03555/0.694, allocations: 13.67 MB / 0.7075 GB, free: 0.668 MB / 0.4981 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 1.935e-05/0.694, allocations: 0 / 0.7075 GB, free: 0.668 MB / 0.4981 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.001749/0.6958, allocations: 227.6 kB / 0.7077 GB, free: 456 kB / 0.4981 GB Notification: Performance of postOpt tearingSystem (simulation): time 0.01506/0.7108, allocations: 4.693 MB / 0.7123 GB, free: 11.75 MB / 0.5137 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 0.0005883/0.7115, allocations: 47.98 kB / 0.7123 GB, free: 11.7 MB / 0.5137 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.04238/0.7539, allocations: 17.63 MB / 0.7295 GB, free: 9.914 MB / 0.5294 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 3.517e-06/0.7539, allocations: 1.062 kB / 0.7295 GB, free: 9.914 MB / 0.5294 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.03254/0.7864, allocations: 11.77 MB / 0.741 GB, free: 14.11 MB / 0.545 GB Notification: Performance of postOpt removeConstants (simulation): time 0.001289/0.7878, allocations: 472.6 kB / 0.7415 GB, free: 13.62 MB / 0.545 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0006398/0.7884, allocations: 48 kB / 0.7415 GB, free: 13.57 MB / 0.545 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.002704/0.7911, allocations: 227.8 kB / 0.7417 GB, free: 13.35 MB / 0.545 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.001108/0.7923, allocations: 382.3 kB / 0.7421 GB, free: 12.98 MB / 0.545 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 0.0001636/0.7924, allocations: 55.95 kB / 0.7422 GB, free: 12.92 MB / 0.545 GB Notification: Performance of sorting global known variables: time 0.002461/0.7949, allocations: 1.755 MB / 0.7439 GB, free: 11.17 MB / 0.545 GB Notification: Performance of sort global known variables: time 1.61e-07/0.7949, allocations: 0 / 0.7439 GB, free: 11.17 MB / 0.545 GB Notification: Performance of remove unused functions: time 0.003233/0.7981, allocations: 1.097 MB / 0.7449 GB, free: 10.07 MB / 0.545 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 1 * Number of states: 24 (g1.order6_1.delta,g1.order6_1.w,g1.order6_1.e1q,g1.order6_1.e1d,g1.order6_1.e2q,g1.order6_1.e2d,g2.order6_1.delta,g2.order6_1.w,g2.order6_1.e1q,g2.order6_1.e1d,g2.order6_1.e2q,g2.order6_1.e2d,g3.order6_1.delta,g3.order6_1.w,g3.order6_1.e1q,g3.order6_1.e1d,g3.order6_1.e2q,g3.order6_1.e2d,g4.order6_1.delta,g4.order6_1.w,g4.order6_1.e1q,g4.order6_1.e1d,g4.order6_1.e2q,g4.order6_1.e2d) * 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 (136): * Single equations (assignments): 135 * 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: 1 * Mixed (continuous/discrete) equation systems: 0 Notification: Torn system details for strict tearing set: * Linear torn systems: 0 * Non-linear torn systems: 1 {54 42} Notification: Performance of Backend phase and start with SimCode phase: time 0.03237/0.8305, allocations: 12.4 MB / 0.757 GB, free: 13.63 MB / 0.5606 GB Notification: Performance of simCode: created initialization part: time 0.01537/0.8459, allocations: 7.052 MB / 0.7639 GB, free: 6.297 MB / 0.5606 GB Notification: Performance of simCode: created event and clocks part: time 5.951e-06/0.846, allocations: 4 kB / 0.7639 GB, free: 6.293 MB / 0.5606 GB Notification: Performance of simCode: created simulation system equations: time 0.0101/0.8561, allocations: 3.676 MB / 0.7675 GB, free: 2.613 MB / 0.5606 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.001664/0.8578, allocations: 190.1 kB / 0.7677 GB, free: 2.426 MB / 0.5606 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.2179/1.076, allocations: 11.73 MB / 0.7792 GB, free: 160 MB / 0.5606 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.001113/1.077, allocations: 1.821 MB / 0.7809 GB, free: 159.3 MB / 0.5606 GB Notification: Performance of simCode: alias equations: time 0.001281/1.078, allocations: 256.4 kB / 0.7812 GB, free: 159.2 MB / 0.5606 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.001672/1.08, allocations: 1.223 MB / 0.7824 GB, free: 159.2 MB / 0.5606 GB Notification: Performance of SimCode: time 1.222e-06/1.08, allocations: 0 / 0.7824 GB, free: 159.2 MB / 0.5606 GB Notification: Performance of buildModelFMU: Generate the FMI files: time 0.1098/1.19, allocations: 73.22 MB / 0.8539 GB, free: 120.6 MB / 0.5606 GB Notification: Performance of buildModelFMU: configured platform static using cached values: time 0.0001287/1.19, allocations: 209.4 kB / 0.8541 GB, free: 120.3 MB / 0.5606 GB Notification: Performance of buildModelFMU: Generate platform static: time 3.994/5.184, allocations: 0 / 0.8541 GB, free: 120.3 MB / 0.5606 GB (rm -f OpenIPSL_dev_OpenIPSL.Examples.TwoAreas.Two_Areas_PSAT.pipe ; mkfifo OpenIPSL_dev_OpenIPSL.Examples.TwoAreas.Two_Areas_PSAT.pipe ; head -c 1048576 < OpenIPSL_dev_OpenIPSL.Examples.TwoAreas.Two_Areas_PSAT.pipe >> ../files/OpenIPSL_dev_OpenIPSL.Examples.TwoAreas.Two_Areas_PSAT.sim & /home/hudson/saved_omc/OMSimulator/install/linux/bin/OMSimulator --tempDir=temp_OpenIPSL_dev_OpenIPSL_Examples_TwoAreas_Two_Areas_PSAT_fmu --startTime=0 --stopTime=10 --timeout=50 --tolerance=1e-06 OpenIPSL_dev_OpenIPSL_Examples_TwoAreas_Two_Areas_PSAT.fmu > OpenIPSL_dev_OpenIPSL.Examples.TwoAreas.Two_Areas_PSAT.pipe 2>&1) Environment - environmentSimulation: