Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries/ --ompython_omhome=/usr IDEAS_dev_IDEAS.Fluid.Geothermal.Borefields.BaseClasses.Boreholes.BaseClasses.Examples.InternalHEXOneUTube.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/IDEAS 3.0.0-master/package.mo", uses=false) Using package IDEAS with version 3.0.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/IDEAS 3.0.0-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(IDEAS.Fluid.Geothermal.Borefields.BaseClasses.Boreholes.BaseClasses.Examples.InternalHEXOneUTube,fileNamePrefix="IDEAS_dev_IDEAS_Fluid_Geothermal_Borefields_BaseClasses_Boreholes_BaseClasses_Examples_InternalHEXOneUTube",fmuType="me",version="2.0",platforms={"static"}) "" <> buildModelFMU(IDEAS.Fluid.Geothermal.Borefields.BaseClasses.Boreholes.BaseClasses.Examples.InternalHEXOneUTube,fileNamePrefix="IDEAS_dev_IDEAS_Fluid_Geothermal_Borefields_BaseClasses_Boreholes_BaseClasses_Examples_InternalHEXOneUTube",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 0.001629/0.001629, allocations: 99.7 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 0.001804/0.001804, 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 2.93/2.93, allocations: 223.2 MB / 239.9 MB, free: 5.375 MB / 190.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/IDEAS 3.0.0-master/package.mo): time 1.656/1.656, allocations: 135.2 MB / 426.2 MB, free: 14.32 MB / 350.1 MB Notification: Performance of FrontEnd - loaded program: time 0.0006041/0.0006044, allocations: 8 kB / 0.5069 GB, free: 5.129 MB / 414.1 MB Notification: Performance of FrontEnd - Absyn->SCode: time 0.2904/0.291, allocations: 82.32 MB / 0.5873 GB, free: 2.984 MB / 494.1 MB Notification: Performance of NFInst.instantiate(IDEAS.Fluid.Geothermal.Borefields.BaseClasses.Boreholes.BaseClasses.Examples.InternalHEXOneUTube): time 0.7591/1.05, allocations: 54.48 MB / 0.6405 GB, free: 21.29 MB / 0.4981 GB Notification: Performance of NFInst.instExpressions: time 0.03633/1.087, allocations: 14.41 MB / 0.6546 GB, free: 11.14 MB / 0.4981 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.005117/1.092, allocations: 57.62 kB / 0.6547 GB, free: 11.11 MB / 0.4981 GB Notification: Performance of NFTyping.typeComponents: time 0.006763/1.099, allocations: 1.082 MB / 0.6557 GB, free: 10.53 MB / 0.4981 GB Notification: Performance of NFTyping.typeBindings: time 0.01346/1.112, allocations: 2.259 MB / 0.6579 GB, free: 9.07 MB / 0.4981 GB Notification: Performance of NFTyping.typeClassSections: time 0.01351/1.126, allocations: 2.682 MB / 0.6605 GB, free: 7.719 MB / 0.4981 GB Notification: Performance of NFFlatten.flatten: time 0.01047/1.136, allocations: 2.638 MB / 0.6631 GB, free: 6.32 MB / 0.4981 GB Notification: Performance of NFFlatten.resolveConnections: time 0.004158/1.14, allocations: 1.079 MB / 0.6642 GB, free: 5.906 MB / 0.4981 GB Notification: Performance of NFEvalConstants.evaluate: time 0.007234/1.148, allocations: 1.2 MB / 0.6653 GB, free: 5.328 MB / 0.4981 GB Notification: Performance of NFSimplifyModel.simplify: time 0.004305/1.152, allocations: 0.8732 MB / 0.6662 GB, free: 4.934 MB / 0.4981 GB Notification: Performance of NFPackage.collectConstants: time 0.0008334/1.153, allocations: 79.22 kB / 0.6663 GB, free: 4.934 MB / 0.4981 GB Notification: Performance of NFFlatten.collectFunctions: time 0.01116/1.164, allocations: 1.923 MB / 0.6681 GB, free: 4.453 MB / 0.4981 GB Notification: Performance of NFScalarize.scalarize: time 0.001612/1.166, allocations: 341.1 kB / 0.6685 GB, free: 4.281 MB / 0.4981 GB Notification: Performance of NFVerifyModel.verify: time 0.002082/1.168, allocations: 404.7 kB / 0.6689 GB, free: 4.059 MB / 0.4981 GB Notification: Performance of NFConvertDAE.convert: time 0.0128/1.181, allocations: 3.192 MB / 0.672 GB, free: 3.387 MB / 0.4981 GB Notification: Performance of FrontEnd - DAE generated: time 6.001e-06/1.181, allocations: 0 / 0.672 GB, free: 3.387 MB / 0.4981 GB Notification: Performance of FrontEnd: time 2.936e-06/1.181, allocations: 0 / 0.672 GB, free: 3.387 MB / 0.4981 GB Notification: Performance of Transformations before backend: time 0.0001465/1.181, allocations: 1.25 kB / 0.672 GB, free: 3.387 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: 264 * Number of variables: 264 Notification: Performance of Generate backend data structure: time 0.0112/1.192, allocations: 2.056 MB / 0.674 GB, free: 2.043 MB / 0.4981 GB Notification: Performance of prepare preOptimizeDAE: time 8.883e-05/1.192, allocations: 8.5 kB / 0.674 GB, free: 2.043 MB / 0.4981 GB Notification: Performance of preOpt introduceOutputAliases (simulation): time 0.0009239/1.193, allocations: 160.1 kB / 0.6741 GB, free: 1.934 MB / 0.4981 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.001406/1.195, allocations: 218.8 kB / 0.6744 GB, free: 1.824 MB / 0.4981 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.006251/1.201, allocations: 1.409 MB / 0.6757 GB, free: 1.004 MB / 0.4981 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.0002181/1.201, allocations: 83.55 kB / 0.6758 GB, free: 0.9648 MB / 0.4981 GB Notification: Performance of preOpt expandDerOperator (simulation): time 0.0005769/1.202, allocations: 113.8 kB / 0.6759 GB, free: 0.9258 MB / 0.4981 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.004163/1.206, allocations: 1.088 MB / 0.677 GB, free: 412 kB / 0.4981 GB Notification: Performance of preOpt findStateOrder (simulation): time 5.218e-05/1.206, allocations: 1.688 kB / 0.677 GB, free: 412 kB / 0.4981 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.0001801/1.206, allocations: 42.75 kB / 0.677 GB, free: 380 kB / 0.4981 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 4.746e-05/1.206, allocations: 29.06 kB / 0.6771 GB, free: 376 kB / 0.4981 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.003026/1.209, allocations: 0.8245 MB / 0.6779 GB, free: 52 kB / 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 preOpt removeSimpleEquations (simulation): time 0.01971/1.229, allocations: 6.846 MB / 0.6845 GB, free: 10.62 MB / 0.5137 GB Notification: Performance of preOpt comSubExp (simulation): time 0.001919/1.231, allocations: 0.7391 MB / 0.6853 GB, free: 10.19 MB / 0.5137 GB Notification: Performance of preOpt evalFunc (simulation): time 0.001975/1.233, allocations: 1.273 MB / 0.6865 GB, free: 8.766 MB / 0.5137 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 6.273e-05/1.233, allocations: 43.09 kB / 0.6865 GB, free: 8.719 MB / 0.5137 GB Notification: Performance of pre-optimization done (n=72): time 4.107e-06/1.233, allocations: 1.188 kB / 0.6866 GB, free: 8.719 MB / 0.5137 GB Notification: Performance of matching and sorting (n=72): time 0.004527/1.238, allocations: 1.162 MB / 0.6877 GB, free: 8.117 MB / 0.5137 GB Notification: Performance of inlineWhenForInitialization (initialization): time 9.375e-05/1.238, allocations: 89.05 kB / 0.6878 GB, free: 8.02 MB / 0.5137 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.005501/1.243, allocations: 1.536 MB / 0.6893 GB, free: 7.414 MB / 0.5137 GB Notification: Performance of collectPreVariables (initialization): time 0.000353/1.244, allocations: 43.52 kB / 0.6893 GB, free: 7.371 MB / 0.5137 GB Notification: Performance of collectInitialEqns (initialization): time 0.001202/1.245, allocations: 0.7109 MB / 0.69 GB, free: 6.805 MB / 0.5137 GB Notification: Performance of collectInitialBindings (initialization): time 0.0005757/1.246, allocations: 253 kB / 0.6902 GB, free: 6.609 MB / 0.5137 GB Notification: Performance of simplifyInitialFunctions (initialization): time 7.926e-05/1.246, allocations: 19.66 kB / 0.6903 GB, free: 6.594 MB / 0.5137 GB Notification: Performance of setup shared object (initialization): time 0.0002145/1.246, allocations: 340.8 kB / 0.6906 GB, free: 6.273 MB / 0.5137 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0009284/1.247, allocations: 274.9 kB / 0.6909 GB, free: 6.168 MB / 0.5137 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.001328/1.248, allocations: 479.6 kB / 0.6913 GB, free: 5.852 MB / 0.5137 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.001082/1.249, allocations: 359.8 kB / 0.6917 GB, free: 5.684 MB / 0.5137 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 6.993e-06/1.249, allocations: 1.438 kB / 0.6917 GB, free: 5.684 MB / 0.5137 GB Notification: Performance of matching and sorting (n=116) (initialization): time 0.003816/1.253, allocations: 1.009 MB / 0.6926 GB, free: 5.23 MB / 0.5137 GB Notification: Performance of prepare postOptimizeDAE: time 0.000978/1.254, allocations: 1.358 MB / 0.694 GB, free: 3.77 MB / 0.5137 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 4.057e-05/1.254, allocations: 4.969 kB / 0.694 GB, free: 3.77 MB / 0.5137 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.0005609/1.255, allocations: 77.61 kB / 0.694 GB, free: 3.734 MB / 0.5137 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.00135/1.256, allocations: 196.4 kB / 0.6942 GB, free: 3.711 MB / 0.5137 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.004078/1.26, allocations: 2.987 MB / 0.6971 GB, free: 0.7852 MB / 0.5137 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.002996/1.263, allocations: 147.6 kB / 0.6973 GB, free: 0.7109 MB / 0.5137 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0003096/1.264, allocations: 38.81 kB / 0.6973 GB, free: 0.7031 MB / 0.5137 GB Notification: Performance of prepare postOptimizeDAE: time 1.989e-05/1.264, allocations: 3.469 kB / 0.6973 GB, free: 0.7031 MB / 0.5137 GB Notification: Performance of postOpt replaceHomotopyWithSimplified (initialization): time 0.003089/1.267, allocations: 0.8422 MB / 0.6982 GB, free: 356 kB / 0.5137 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 3.832e-05/1.267, allocations: 9.469 kB / 0.6982 GB, free: 352 kB / 0.5137 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.0002893/1.267, allocations: 65.33 kB / 0.6982 GB, free: 320 kB / 0.5137 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.001196/1.268, allocations: 191.9 kB / 0.6984 GB, free: 300 kB / 0.5137 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.003992/1.272, allocations: 2.978 MB / 0.7013 GB, free: 13.37 MB / 0.5294 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.002648/1.275, allocations: 146.2 kB / 0.7015 GB, free: 13.3 MB / 0.5294 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0002754/1.275, allocations: 39.64 kB / 0.7015 GB, free: 13.29 MB / 0.5294 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 15 * 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 (107): * Single equations (assignments): 104 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 1 * 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: 2 {(1,100.0%) 3,(1,100.0%) 3} * Non-linear torn systems: 0 Notification: Performance of prepare postOptimizeDAE: time 0.001778/1.277, allocations: 445.6 kB / 0.7019 GB, free: 12.96 MB / 0.5294 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0009066/1.278, allocations: 159.2 kB / 0.7021 GB, free: 12.88 MB / 0.5294 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.003679/1.282, allocations: 1.048 MB / 0.7031 GB, free: 12.41 MB / 0.5294 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 3.286e-05/1.282, allocations: 7.375 kB / 0.7031 GB, free: 12.41 MB / 0.5294 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 1.473e-05/1.282, allocations: 6.156 kB / 0.7031 GB, free: 12.41 MB / 0.5294 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 0.002069/1.284, allocations: 0.79 MB / 0.7039 GB, free: 11.98 MB / 0.5294 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.009833/1.294, allocations: 2.7 MB / 0.7065 GB, free: 10.35 MB / 0.5294 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 1.356e-05/1.294, allocations: 4.688 kB / 0.7065 GB, free: 10.35 MB / 0.5294 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.001042/1.295, allocations: 145.8 kB / 0.7067 GB, free: 10.31 MB / 0.5294 GB Notification: Performance of postOpt tearingSystem (simulation): time 0.0004313/1.295, allocations: 70.38 kB / 0.7067 GB, free: 10.27 MB / 0.5294 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 9.622e-05/1.296, allocations: 25.83 kB / 0.7067 GB, free: 10.25 MB / 0.5294 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.003842/1.299, allocations: 2.991 MB / 0.7097 GB, free: 7.242 MB / 0.5294 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 9.208e-06/1.299, allocations: 4.438 kB / 0.7097 GB, free: 7.242 MB / 0.5294 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.004654/1.304, allocations: 1.626 MB / 0.7113 GB, free: 5.988 MB / 0.5294 GB Notification: Performance of postOpt removeConstants (simulation): time 0.00214/1.306, allocations: 406 kB / 0.7116 GB, free: 5.637 MB / 0.5294 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0007067/1.307, allocations: 20.41 kB / 0.7117 GB, free: 5.625 MB / 0.5294 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.001552/1.309, allocations: 53.5 kB / 0.7117 GB, free: 5.598 MB / 0.5294 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0001848/1.309, allocations: 63.59 kB / 0.7118 GB, free: 5.562 MB / 0.5294 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 0.0001287/1.309, allocations: 34.67 kB / 0.7118 GB, free: 5.551 MB / 0.5294 GB Notification: Performance of sorting global known variables: time 0.003252/1.312, allocations: 1.092 MB / 0.7129 GB, free: 4.957 MB / 0.5294 GB Notification: Performance of sort global known variables: time 3.91e-07/1.312, allocations: 0 / 0.7129 GB, free: 4.957 MB / 0.5294 GB Notification: Performance of remove unused functions: time 0.007627/1.32, allocations: 1.082 MB / 0.7139 GB, free: 4.715 MB / 0.5294 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 15 * Number of states: 6 (intHex.vol1.dynBal.U,intHex.vol2.dynBal.U,intHex.intResUTub.capFil1.T,intHex.intResUTub.capFil2.T,senTem.T,senTem1.T) * 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 (72): * Single equations (assignments): 63 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 7 * 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: 2 {(1,100.0%) 3,(1,100.0%) 3} * Non-linear torn systems: 0 Notification: Performance of Backend phase and start with SimCode phase: time 0.008341/1.328, allocations: 3.786 MB / 0.7176 GB, free: 1.801 MB / 0.5294 GB Notification: Performance of simCode: created initialization part: time 0.004305/1.333, allocations: 1.689 MB / 0.7193 GB, free: 0.7344 MB / 0.5294 GB Notification: Performance of simCode: created event and clocks part: time 1.27e-05/1.333, allocations: 2.719 kB / 0.7193 GB, free: 0.7344 MB / 0.5294 GB Notification: Performance of simCode: created simulation system equations: time 0.001253/1.334, allocations: 0.5934 MB / 0.7199 GB, free: 332 kB / 0.5294 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.007042/1.341, allocations: 0.7899 MB / 0.7206 GB, free: 15.95 MB / 0.545 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.01462/1.356, allocations: 6.728 MB / 0.7272 GB, free: 9.781 MB / 0.545 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.001445/1.357, allocations: 1.312 MB / 0.7285 GB, free: 8.441 MB / 0.545 GB Notification: Performance of simCode: alias equations: time 0.002893/1.36, allocations: 363.7 kB / 0.7288 GB, free: 8.105 MB / 0.545 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.001527/1.362, allocations: 0.6125 MB / 0.7294 GB, free: 7.492 MB / 0.545 GB Notification: Performance of SimCode: time 1.903e-06/1.362, allocations: 8 kB / 0.7294 GB, free: 7.484 MB / 0.545 GB Notification: Performance of buildModelFMU: Generate the FMI files: time 0.1977/1.559, allocations: 51.65 MB / 0.7799 GB, free: 4.523 MB / 0.5919 GB Notification: Performance of buildModelFMU: configured platform static using cached values: time 0.00041/1.56, allocations: 292.8 kB / 0.7802 GB, free: 4.164 MB / 0.5919 GB Notification: Performance of buildModelFMU: Generate platform static: time 6.129/7.689, allocations: 6.328 kB / 0.7802 GB, free: 4.16 MB / 0.5919 GB (rm -f IDEAS_dev_IDEAS.Fluid.Geothermal.Borefields.BaseClasses.Boreholes.BaseClasses.Examples.InternalHEXOneUTube.pipe ; mkfifo IDEAS_dev_IDEAS.Fluid.Geothermal.Borefields.BaseClasses.Boreholes.BaseClasses.Examples.InternalHEXOneUTube.pipe ; head -c 1048576 < IDEAS_dev_IDEAS.Fluid.Geothermal.Borefields.BaseClasses.Boreholes.BaseClasses.Examples.InternalHEXOneUTube.pipe >> ../files/IDEAS_dev_IDEAS.Fluid.Geothermal.Borefields.BaseClasses.Boreholes.BaseClasses.Examples.InternalHEXOneUTube.sim & /home/hudson/saved_omc/OMSimulator/install/linux/bin/OMSimulator --tempDir=temp_IDEAS_dev_IDEAS_Fluid_Geothermal_Borefields_BaseClasses_Boreholes_BaseClasses_Examples_InternalHEXOneUTube_fmu --startTime=0 --stopTime=100000 --timeout=50 --tolerance=1e-06 IDEAS_dev_IDEAS_Fluid_Geothermal_Borefields_BaseClasses_Boreholes_BaseClasses_Examples_InternalHEXOneUTube.fmu > IDEAS_dev_IDEAS.Fluid.Geothermal.Borefields.BaseClasses.Boreholes.BaseClasses.Examples.InternalHEXOneUTube.pipe 2>&1) Environment - environmentSimulation: