Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries/ --ompython_omhome=/usr IDEAS_dev_IDEAS.Fluid.Examples.Performance.PressureDrop.SeriesParallelFlow.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.Examples.Performance.PressureDrop.SeriesParallelFlow,fileNamePrefix="IDEAS_dev_IDEAS_Fluid_Examples_Performance_PressureDrop_SeriesParallelFlow",fmuType="me",version="2.0",platforms={"static"}) "" <> buildModelFMU(IDEAS.Fluid.Examples.Performance.PressureDrop.SeriesParallelFlow,fileNamePrefix="IDEAS_dev_IDEAS_Fluid_Examples_Performance_PressureDrop_SeriesParallelFlow",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 0.001591/0.001591, 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/Complex 4.0.0+maint.om/package.mo): time 0.001942/0.001942, allocations: 177.3 kB / 15.94 MB, free: 228 kB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo): time 2.686/2.686, allocations: 223.2 MB / 239.9 MB, free: 5.457 MB / 190.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/IDEAS 3.0.0-master/package.mo): time 1.754/1.754, allocations: 135.2 MB / 426.2 MB, free: 14.31 MB / 350.1 MB Notification: Performance of FrontEnd - loaded program: time 0.0004633/0.0004636, allocations: 13.12 kB / 0.5069 GB, free: 5.203 MB / 414.1 MB Notification: Performance of FrontEnd - Absyn->SCode: time 0.2583/0.2588, allocations: 82.31 MB / 0.5873 GB, free: 3.078 MB / 494.1 MB Notification: Performance of NFInst.instantiate(IDEAS.Fluid.Examples.Performance.PressureDrop.SeriesParallelFlow): time 0.9045/1.163, allocations: 140.5 MB / 0.7245 GB, free: 8.551 MB / 0.545 GB Notification: Performance of NFInst.instExpressions: time 0.006859/1.17, allocations: 2.15 MB / 0.7266 GB, free: 7.059 MB / 0.545 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.001248/1.172, allocations: 15.19 kB / 0.7266 GB, free: 7.051 MB / 0.545 GB Notification: Performance of NFTyping.typeComponents: time 0.002024/1.174, allocations: 236.9 kB / 0.7268 GB, free: 6.918 MB / 0.545 GB Notification: Performance of NFTyping.typeBindings: time 0.006121/1.18, allocations: 0.6947 MB / 0.7275 GB, free: 6.492 MB / 0.545 GB Notification: Performance of NFTyping.typeClassSections: time 0.003676/1.184, allocations: 447.6 kB / 0.7279 GB, free: 6.285 MB / 0.545 GB Notification: Performance of NFFlatten.flatten: time 0.006011/1.19, allocations: 1.644 MB / 0.7295 GB, free: 5.461 MB / 0.545 GB Notification: Performance of NFFlatten.resolveConnections: time 0.006499/1.196, allocations: 2.314 MB / 0.7318 GB, free: 4.648 MB / 0.545 GB Notification: Performance of NFEvalConstants.evaluate: time 0.004453/1.201, allocations: 0.8583 MB / 0.7326 GB, free: 4.234 MB / 0.545 GB Notification: Performance of NFSimplifyModel.simplify: time 0.0025/1.203, allocations: 0.605 MB / 0.7332 GB, free: 3.98 MB / 0.545 GB Notification: Performance of NFPackage.collectConstants: time 0.0004917/1.204, allocations: 46.78 kB / 0.7332 GB, free: 3.98 MB / 0.545 GB Notification: Performance of NFFlatten.collectFunctions: time 0.003715/1.208, allocations: 0.6282 MB / 0.7338 GB, free: 3.816 MB / 0.545 GB Notification: Performance of NFScalarize.scalarize: time 0.001205/1.209, allocations: 300.2 kB / 0.7341 GB, free: 3.699 MB / 0.545 GB Notification: Performance of NFVerifyModel.verify: time 0.001235/1.21, allocations: 247.4 kB / 0.7344 GB, free: 3.57 MB / 0.545 GB Notification: Performance of NFConvertDAE.convert: time 0.003228/1.213, allocations: 1.17 MB / 0.7355 GB, free: 3.305 MB / 0.545 GB Notification: Performance of FrontEnd - DAE generated: time 5.28e-06/1.213, allocations: 3.188 kB / 0.7355 GB, free: 3.305 MB / 0.545 GB Notification: Performance of FrontEnd: time 3.807e-06/1.213, allocations: 4 kB / 0.7355 GB, free: 3.301 MB / 0.545 GB Notification: Performance of Transformations before backend: time 3.93e-05/1.213, allocations: 0 / 0.7355 GB, free: 3.301 MB / 0.545 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 136 * Number of variables: 136 Notification: Performance of Generate backend data structure: time 0.005099/1.219, allocations: 1.516 MB / 0.737 GB, free: 2.355 MB / 0.545 GB Notification: Performance of prepare preOptimizeDAE: time 6.483e-05/1.219, allocations: 11.66 kB / 0.737 GB, free: 2.355 MB / 0.545 GB Notification: Performance of preOpt introduceOutputAliases (simulation): time 0.0003657/1.219, allocations: 100 kB / 0.7371 GB, free: 2.281 MB / 0.545 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.00187/1.221, allocations: 202.7 kB / 0.7373 GB, free: 2.203 MB / 0.545 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.003602/1.225, allocations: 0.8646 MB / 0.7381 GB, free: 1.629 MB / 0.545 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 9.529e-05/1.225, allocations: 53.31 kB / 0.7382 GB, free: 1.578 MB / 0.545 GB Notification: Performance of preOpt expandDerOperator (simulation): time 0.0002316/1.225, allocations: 66.16 kB / 0.7383 GB, free: 1.516 MB / 0.545 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.002975/1.228, allocations: 0.9873 MB / 0.7392 GB, free: 0.6602 MB / 0.545 GB Notification: Performance of preOpt findStateOrder (simulation): time 2.652e-05/1.228, allocations: 0 / 0.7392 GB, free: 0.6602 MB / 0.545 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.0001311/1.228, allocations: 28 kB / 0.7392 GB, free: 0.6328 MB / 0.545 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 2.689e-05/1.228, allocations: 12 kB / 0.7393 GB, free: 0.6211 MB / 0.545 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.002627/1.231, allocations: 0.8092 MB / 0.7401 GB, free: 15.96 MB / 0.5606 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 0.0102/1.241, allocations: 4.812 MB / 0.7448 GB, free: 10.8 MB / 0.5606 GB Notification: Performance of preOpt comSubExp (simulation): time 0.004777/1.246, allocations: 4.023 MB / 0.7487 GB, free: 5.957 MB / 0.5606 GB Notification: Performance of preOpt evalFunc (simulation): time 0.0001533/1.246, allocations: 16.27 kB / 0.7487 GB, free: 5.941 MB / 0.5606 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 0.001113/1.247, allocations: 330 kB / 0.749 GB, free: 5.598 MB / 0.5606 GB Notification: Performance of preOpt simplifyInStream (simulation): time 0.0008691/1.248, allocations: 27.69 kB / 0.749 GB, free: 5.57 MB / 0.5606 GB Notification: Performance of pre-optimization done (n=35): time 4.389e-06/1.248, allocations: 0 / 0.749 GB, free: 5.57 MB / 0.5606 GB Notification: Performance of matching and sorting (n=35): time 0.009505/1.258, allocations: 1.507 MB / 0.7505 GB, free: 4.039 MB / 0.5606 GB Notification: Performance of inlineWhenForInitialization (initialization): time 0.0001046/1.258, allocations: 110.8 kB / 0.7506 GB, free: 3.906 MB / 0.5606 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.003291/1.261, allocations: 1.18 MB / 0.7518 GB, free: 2.711 MB / 0.5606 GB Notification: Performance of collectPreVariables (initialization): time 0.0002282/1.261, allocations: 33.7 kB / 0.7518 GB, free: 2.672 MB / 0.5606 GB Notification: Performance of collectInitialEqns (initialization): time 0.0009091/1.262, allocations: 0.516 MB / 0.7523 GB, free: 2.152 MB / 0.5606 GB Notification: Performance of collectInitialBindings (initialization): time 0.0002474/1.263, allocations: 118.4 kB / 0.7524 GB, free: 2.035 MB / 0.5606 GB Notification: Performance of simplifyInitialFunctions (initialization): time 5.664e-05/1.263, allocations: 12 kB / 0.7524 GB, free: 2.023 MB / 0.5606 GB Notification: Performance of setup shared object (initialization): time 0.0001909/1.263, allocations: 322 kB / 0.7527 GB, free: 1.703 MB / 0.5606 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0008855/1.264, allocations: 209 kB / 0.7529 GB, free: 1.5 MB / 0.5606 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.001373/1.265, allocations: 0.5298 MB / 0.7535 GB, free: 0.832 MB / 0.5606 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.0009766/1.266, allocations: 331.4 kB / 0.7538 GB, free: 0.5039 MB / 0.5606 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 7.454e-06/1.266, allocations: 0 / 0.7538 GB, free: 0.5039 MB / 0.5606 GB Notification: Performance of matching and sorting (n=58) (initialization): time 0.004705/1.271, allocations: 1.036 MB / 0.7548 GB, free: 15.45 MB / 0.5762 GB Notification: Performance of prepare postOptimizeDAE: time 0.00149/1.272, allocations: 2.139 MB / 0.7569 GB, free: 13.15 MB / 0.5762 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 2.636e-05/1.272, allocations: 12 kB / 0.7569 GB, free: 13.14 MB / 0.5762 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.002392/1.275, allocations: 378.7 kB / 0.7572 GB, free: 12.77 MB / 0.5762 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0008954/1.276, allocations: 135.7 kB / 0.7574 GB, free: 12.64 MB / 0.5762 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.003329/1.279, allocations: 1.66 MB / 0.759 GB, free: 10.93 MB / 0.5762 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.002312/1.281, allocations: 111.8 kB / 0.7591 GB, free: 10.82 MB / 0.5762 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0002006/1.282, allocations: 27.98 kB / 0.7591 GB, free: 10.79 MB / 0.5762 GB Notification: Performance of prepare postOptimizeDAE: time 2.684e-05/1.282, allocations: 4 kB / 0.7591 GB, free: 10.79 MB / 0.5762 GB Notification: Performance of postOpt replaceHomotopyWithSimplified (initialization): time 0.002991/1.285, allocations: 0.7748 MB / 0.7599 GB, free: 10 MB / 0.5762 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 2.649e-05/1.285, allocations: 8 kB / 0.7599 GB, free: 9.996 MB / 0.5762 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.0009506/1.286, allocations: 217.1 kB / 0.7601 GB, free: 9.781 MB / 0.5762 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.000673/1.286, allocations: 111.8 kB / 0.7602 GB, free: 9.672 MB / 0.5762 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.006893/1.293, allocations: 3 MB / 0.7631 GB, free: 6.543 MB / 0.5762 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.00209/1.295, allocations: 95.81 kB / 0.7632 GB, free: 6.449 MB / 0.5762 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0001803/1.296, allocations: 23.98 kB / 0.7632 GB, free: 6.426 MB / 0.5762 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 24 * Number of states: 0 () * Number of discrete variables: 5 ($whenCondition1,$PRE.pulse_m_flow.T_start,pulse_m_flow.T_start,$PRE.pulse_m_flow.count,pulse_m_flow.count) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (38): * Single equations (assignments): 35 * Array equations: 0 * Algorithm blocks: 1 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (linear and non-linear blocks): 1 * Torn equation systems: 1 * Mixed (continuous/discrete) equation systems: 0 Notification: Equation system details: * Constant Jacobian: 0 * Linear Jacobian (size,density): 0 * Non-linear Jacobian: 1 {1} * Without analytic Jacobian: 0 Notification: Torn system details for strict tearing set: * Linear torn systems: 0 * Non-linear torn systems: 1 {10 10} Notification: Performance of prepare postOptimizeDAE: time 0.001602/1.297, allocations: 484.7 kB / 0.7637 GB, free: 5.941 MB / 0.5762 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0004598/1.298, allocations: 110.6 kB / 0.7638 GB, free: 5.832 MB / 0.5762 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.002266/1.3, allocations: 0.7717 MB / 0.7646 GB, free: 5.051 MB / 0.5762 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 1.379e-05/1.3, allocations: 4 kB / 0.7646 GB, free: 5.047 MB / 0.5762 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 4.399e-06/1.3, allocations: 3.938 kB / 0.7646 GB, free: 5.043 MB / 0.5762 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 1.087e-05/1.3, allocations: 7.984 kB / 0.7646 GB, free: 5.035 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 postOpt removeSimpleEquations (simulation): time 0.005636/1.306, allocations: 2.186 MB / 0.7667 GB, free: 2.707 MB / 0.5762 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 1.84e-05/1.306, allocations: 8.219 kB / 0.7667 GB, free: 2.699 MB / 0.5762 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0005521/1.306, allocations: 99.77 kB / 0.7668 GB, free: 2.602 MB / 0.5762 GB Notification: Performance of postOpt tearingSystem (simulation): time 0.0006134/1.307, allocations: 190.1 kB / 0.767 GB, free: 2.414 MB / 0.5762 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 4.141e-05/1.307, allocations: 8 kB / 0.767 GB, free: 2.406 MB / 0.5762 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.001962/1.309, allocations: 1.474 MB / 0.7685 GB, free: 0.8828 MB / 0.5762 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 4.469e-06/1.309, allocations: 96 / 0.7685 GB, free: 0.8828 MB / 0.5762 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.002637/1.312, allocations: 0.9497 MB / 0.7694 GB, free: 15.86 MB / 0.5919 GB Notification: Performance of postOpt removeConstants (simulation): time 0.0009887/1.313, allocations: 231.7 kB / 0.7696 GB, free: 15.61 MB / 0.5919 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.000433/1.313, allocations: 8 kB / 0.7696 GB, free: 15.61 MB / 0.5919 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.00156/1.315, allocations: 79.75 kB / 0.7697 GB, free: 15.53 MB / 0.5919 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0001513/1.315, allocations: 43.84 kB / 0.7697 GB, free: 15.48 MB / 0.5919 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 4.836e-05/1.315, allocations: 8.188 kB / 0.7697 GB, free: 15.48 MB / 0.5919 GB Notification: Performance of sorting global known variables: time 0.002687/1.318, allocations: 0.8288 MB / 0.7705 GB, free: 14.64 MB / 0.5919 GB Notification: Performance of sort global known variables: time 5.31e-07/1.318, allocations: 3.938 kB / 0.7705 GB, free: 14.64 MB / 0.5919 GB Notification: Performance of remove unused functions: time 0.003871/1.322, allocations: 0.5071 MB / 0.771 GB, free: 14.13 MB / 0.5919 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 8 * Number of states: 0 () * Number of discrete variables: 3 ($whenCondition1,pulse_m_flow.T_start,pulse_m_flow.count) * Number of discrete states: 1 (pulse_m_flow.count) * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for simulation (25): * Single equations (assignments): 21 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 2 * If-equations: 0 * Equation systems (linear and non-linear blocks): 1 * Torn equation systems: 1 * Mixed (continuous/discrete) equation systems: 0 Notification: Equation system details: * Constant Jacobian: 0 * Linear Jacobian (size,density): 0 * Non-linear Jacobian: 1 {1} * Without analytic Jacobian: 0 Notification: Torn system details for strict tearing set: * Linear torn systems: 0 * Non-linear torn systems: 1 {9 2} Notification: Performance of Backend phase and start with SimCode phase: time 0.004885/1.327, allocations: 1.987 MB / 0.773 GB, free: 12.08 MB / 0.5919 GB Notification: Performance of simCode: created initialization part: time 0.005292/1.332, allocations: 1.288 MB / 0.7742 GB, free: 10.75 MB / 0.5919 GB Notification: Performance of simCode: created event and clocks part: time 1.296e-05/1.332, allocations: 0 / 0.7742 GB, free: 10.75 MB / 0.5919 GB Notification: Performance of simCode: created simulation system equations: time 0.00126/1.333, allocations: 333.5 kB / 0.7746 GB, free: 10.43 MB / 0.5919 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.006485/1.34, allocations: 0.6501 MB / 0.7752 GB, free: 9.793 MB / 0.5919 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.03516/1.375, allocations: 10.44 MB / 0.7854 GB, free: 15 MB / 0.6075 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.001699/1.377, allocations: 1.232 MB / 0.7866 GB, free: 13.74 MB / 0.6075 GB Notification: Performance of simCode: alias equations: time 0.002797/1.38, allocations: 356.4 kB / 0.7869 GB, free: 13.39 MB / 0.6075 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.001055/1.381, allocations: 363.3 kB / 0.7873 GB, free: 13.03 MB / 0.6075 GB Notification: Performance of SimCode: time 2.053e-06/1.381, allocations: 0 / 0.7873 GB, free: 13.03 MB / 0.6075 GB Notification: Performance of buildModelFMU: Generate the FMI files: time 0.1245/1.505, allocations: 31.09 MB / 0.8176 GB, free: 14.39 MB / 0.6387 GB Notification: Performance of buildModelFMU: configured platform static using cached values: time 0.0004297/1.506, allocations: 263 kB / 0.8179 GB, free: 14.04 MB / 0.6387 GB Notification: Performance of buildModelFMU: Generate platform static: time 4.5/6.005, allocations: 0 / 0.8179 GB, free: 14.04 MB / 0.6387 GB (rm -f IDEAS_dev_IDEAS.Fluid.Examples.Performance.PressureDrop.SeriesParallelFlow.pipe ; mkfifo IDEAS_dev_IDEAS.Fluid.Examples.Performance.PressureDrop.SeriesParallelFlow.pipe ; head -c 1048576 < IDEAS_dev_IDEAS.Fluid.Examples.Performance.PressureDrop.SeriesParallelFlow.pipe >> ../files/IDEAS_dev_IDEAS.Fluid.Examples.Performance.PressureDrop.SeriesParallelFlow.sim & /home/hudson/saved_omc/OMSimulator/install/linux/bin/OMSimulator --tempDir=temp_IDEAS_dev_IDEAS_Fluid_Examples_Performance_PressureDrop_SeriesParallelFlow_fmu --startTime=0 --stopTime=1 --timeout=50 --tolerance=1e-06 IDEAS_dev_IDEAS_Fluid_Examples_Performance_PressureDrop_SeriesParallelFlow.fmu > IDEAS_dev_IDEAS.Fluid.Examples.Performance.PressureDrop.SeriesParallelFlow.pipe 2>&1) Environment - environmentSimulation: