Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries/ --ompython_omhome=/usr Buildings_8_Buildings.Electrical.AC.ThreePhasesUnbalanced.Validation.IEEETests.Test4NodesFeeder.UnbalancedStepDown.YY.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 3.2.3+maint.om/package.mo", uses=false)
loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 8.1.4-maint.8.1.x/package.mo", uses=false)
Using package Buildings with version 8.1.4 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 8.1.4-maint.8.1.x/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)
Running command: translateModel(Buildings.Electrical.AC.ThreePhasesUnbalanced.Validation.IEEETests.Test4NodesFeeder.UnbalancedStepDown.YY,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="Buildings_8_Buildings.Electrical.AC.ThreePhasesUnbalanced.Validation.IEEETests.Test4NodesFeeder.UnbalancedStepDown.YY")
translateModel(Buildings.Electrical.AC.ThreePhasesUnbalanced.Validation.IEEETests.Test4NodesFeeder.UnbalancedStepDown.YY,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="Buildings_8_Buildings.Electrical.AC.ThreePhasesUnbalanced.Validation.IEEETests.Test4NodesFeeder.UnbalancedStepDown.YY")
Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.000891/0.000891, allocations: 97.91 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 0.0008562/0.0008566, 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 3.2.3+maint.om/package.mo): time 1.371/1.371, allocations: 205.4 MB / 222.1 MB, free: 5.648 MB / 174.1 MB
Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 8.1.4-maint.8.1.x/package.mo): time 1.674/1.674, allocations: 292.5 MB / 0.5497 GB, free: 14.61 MB / 462.1 MB
Notification: Modelica requested package Complex of version 3.2.3. Complex 4.0.0 is used instead which states that it is fully compatible without conversion script needed.
Notification: Modelica requested package ModelicaServices of version 3.2.3. ModelicaServices 4.0.0 is used instead which states that it is fully compatible without conversion script needed.
Notification: Performance of FrontEnd - loaded program: time 0.0005122/0.0005123, allocations: 18.28 kB / 0.6736 GB, free: 26.41 MB / 0.5294 GB
Notification: Performance of FrontEnd - Absyn->SCode: time 0.2801/0.2806, allocations: 116.3 MB / 0.7871 GB, free: 11.95 MB / 0.6075 GB
Notification: Performance of NFInst.instantiate(Buildings.Electrical.AC.ThreePhasesUnbalanced.Validation.IEEETests.Test4NodesFeeder.UnbalancedStepDown.YY): time 0.01961/0.3002, allocations: 17.43 MB / 0.8042 GB, free: 10.46 MB / 0.6231 GB
Notification: Performance of NFInst.instExpressions: time 0.01163/0.3119, allocations: 6.86 MB / 0.8109 GB, free: 3.582 MB / 0.6231 GB
Notification: Performance of NFInst.updateImplicitVariability: time 0.002052/0.314, allocations: 47.88 kB / 0.8109 GB, free: 3.535 MB / 0.6231 GB
Notification: Performance of NFTyping.typeComponents: time 0.001406/0.3154, allocations: 441.4 kB / 0.8113 GB, free: 3.102 MB / 0.6231 GB
Notification: Performance of NFTyping.typeBindings: time 0.003229/0.3187, allocations: 0.8684 MB / 0.8122 GB, free: 2.23 MB / 0.6231 GB
Notification: Performance of NFTyping.typeClassSections: time 0.002758/0.3215, allocations: 0.8299 MB / 0.813 GB, free: 1.402 MB / 0.6231 GB
Notification: Performance of NFFlatten.flatten: time 0.004374/0.3258, allocations: 2.515 MB / 0.8154 GB, free: 14.88 MB / 0.6387 GB
Notification: Performance of NFFlatten.resolveConnections: time 0.01221/0.3381, allocations: 8.628 MB / 0.8239 GB, free: 6.172 MB / 0.6387 GB
Notification: Performance of NFEvalConstants.evaluate: time 0.002683/0.3408, allocations: 1.476 MB / 0.8253 GB, free: 4.691 MB / 0.6387 GB
Notification: Performance of NFSimplifyModel.simplify: time 0.002974/0.3438, allocations: 1.827 MB / 0.8271 GB, free: 2.859 MB / 0.6387 GB
Notification: Performance of NFPackage.collectConstants: time 0.0009461/0.3447, allocations: 256 kB / 0.8273 GB, free: 2.609 MB / 0.6387 GB
Notification: Performance of NFFlatten.collectFunctions: time 0.002082/0.3468, allocations: 0.6829 MB / 0.828 GB, free: 1.926 MB / 0.6387 GB
Notification: Performance of NFScalarize.scalarize: time 0.00235/0.3492, allocations: 1.883 MB / 0.8298 GB, free: 40 kB / 0.6387 GB
Notification: Performance of NFVerifyModel.verify: time 0.001565/0.3508, allocations: 0.7654 MB / 0.8306 GB, free: 15.26 MB / 0.6544 GB
Notification: Performance of NFConvertDAE.convert: time 0.00712/0.3579, allocations: 7.107 MB / 0.8375 GB, free: 8.141 MB / 0.6544 GB
Notification: Performance of FrontEnd - DAE generated: time 3.727e-06/0.3579, allocations: 0 / 0.8375 GB, free: 8.141 MB / 0.6544 GB
Notification: Performance of FrontEnd: time 2.525e-06/0.3579, allocations: 0 / 0.8375 GB, free: 8.141 MB / 0.6544 GB
Notification: Performance of Transformations before backend: time 0.0001988/0.3581, allocations: 0 / 0.8375 GB, free: 8.141 MB / 0.6544 GB
Notification: Model statistics after passing the front-end and creating the data structures used by the back-end:
 * Number of equations: 1094
 * Number of variables: 1094
Notification: Performance of Generate backend data structure: time 0.009494/0.3676, allocations: 3.337 MB / 0.8408 GB, free: 4.742 MB / 0.6544 GB
Notification: Performance of prepare preOptimizeDAE: time 5.535e-05/0.3677, allocations: 8.031 kB / 0.8408 GB, free: 4.734 MB / 0.6544 GB
Notification: Performance of preOpt normalInlineFunction (simulation): time 0.01335/0.3811, allocations: 2.492 MB / 0.8432 GB, free: 2.234 MB / 0.6544 GB
Notification: Performance of preOpt evaluateParameters (simulation): time 0.006554/0.3877, allocations: 2.26 MB / 0.8454 GB, free: 15.93 MB / 0.67 GB
Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.0002891/0.388, allocations: 299.9 kB / 0.8457 GB, free: 15.63 MB / 0.67 GB
Notification: Performance of preOpt expandDerOperator (simulation): time 0.001572/0.3896, allocations: 391.9 kB / 0.8461 GB, free: 15.25 MB / 0.67 GB
Notification: Performance of preOpt clockPartitioning (simulation): time 0.0184/0.408, allocations: 7.597 MB / 0.8535 GB, free: 7.543 MB / 0.67 GB
Notification: Performance of preOpt findStateOrder (simulation): time 9.446e-05/0.4081, allocations: 11.92 kB / 0.8535 GB, free: 7.531 MB / 0.67 GB
Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.0005033/0.4087, allocations: 164 kB / 0.8537 GB, free: 7.371 MB / 0.67 GB
Notification: Performance of preOpt inlineArrayEqn (simulation): time 0.0004701/0.4091, allocations: 342.8 kB / 0.854 GB, free: 7.035 MB / 0.67 GB
Notification: Performance of preOpt removeEqualRHS (simulation): time 0.01679/0.4259, allocations: 7.245 MB / 0.8611 GB, free: 15.78 MB / 0.6856 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 0.04777/0.4738, allocations: 29.29 MB / 0.8897 GB, free: 15.96 MB / 0.7169 GB
Notification: Performance of preOpt comSubExp (simulation): time 0.008669/0.4825, allocations: 3.615 MB / 0.8932 GB, free: 12.18 MB / 0.7169 GB
Notification: Performance of preOpt evalFunc (simulation): time 0.0003928/0.4829, allocations: 130.3 kB / 0.8933 GB, free: 12.04 MB / 0.7169 GB
Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 6.207e-05/0.483, allocations: 55.81 kB / 0.8934 GB, free: 11.97 MB / 0.7169 GB
Notification: Performance of pre-optimization done (n=176): time 4.238e-06/0.483, allocations: 0 / 0.8934 GB, free: 11.97 MB / 0.7169 GB
Notification: Performance of matching and sorting (n=221): time 0.08478/0.5678, allocations: 24.61 MB / 0.9174 GB, free: 3.266 MB / 0.7325 GB
Notification: Performance of inlineWhenForInitialization (initialization): time 0.0001668/0.5681, allocations: 235.6 kB / 0.9177 GB, free: 2.988 MB / 0.7325 GB
Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.002554/0.5706, allocations: 1.616 MB / 0.9192 GB, free: 1.359 MB / 0.7325 GB
Notification: Performance of collectPreVariables (initialization): time 0.0005026/0.5711, allocations: 61.7 kB / 0.9193 GB, free: 1.293 MB / 0.7325 GB
Notification: Performance of collectInitialEqns (initialization): time 0.4441/1.015, allocations: 1.734 MB / 0.921 GB, free: 122 MB / 0.7325 GB
Notification: Performance of collectInitialBindings (initialization): time 0.0009927/1.016, allocations: 0.7589 MB / 0.9217 GB, free: 121.7 MB / 0.7325 GB
Notification: Performance of simplifyInitialFunctions (initialization): time 0.0003162/1.017, allocations: 63.19 kB / 0.9218 GB, free: 121.7 MB / 0.7325 GB
Notification: Performance of setup shared object (initialization): time 0.0002115/1.017, allocations: 440.6 kB / 0.9222 GB, free: 121.4 MB / 0.7325 GB
Notification: Performance of preBalanceInitialSystem (initialization): time 0.006353/1.023, allocations: 2.405 MB / 0.9246 GB, free: 121.4 MB / 0.7325 GB
Notification: Performance of partitionIndependentBlocks (initialization): time 0.00661/1.03, allocations: 3.494 MB / 0.928 GB, free: 119.9 MB / 0.7325 GB
Notification: Performance of analyzeInitialSystem (initialization): time 0.006269/1.036, allocations: 2.885 MB / 0.9308 GB, free: 119 MB / 0.7325 GB
Notification: Performance of solveInitialSystemEqSystem (initialization): time 4.339e-05/1.036, allocations: 14.66 kB / 0.9308 GB, free: 119 MB / 0.7325 GB
Notification: Performance of matching and sorting (n=400) (initialization): time 0.0304/1.067, allocations: 9.856 MB / 0.9404 GB, free: 116.5 MB / 0.7325 GB
Notification: Performance of prepare postOptimizeDAE: time 0.002999/1.07, allocations: 13.84 MB / 0.9539 GB, free: 101.7 MB / 0.7325 GB
Notification: Performance of postOpt simplifyComplexFunction (initialization): time 0.0001174/1.07, allocations: 35.25 kB / 0.954 GB, free: 101.7 MB / 0.7325 GB
Notification: Performance of postOpt tearingSystem (initialization): time 0.02026/1.09, allocations: 5.42 MB / 0.9593 GB, free: 101.2 MB / 0.7325 GB
Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.004596/1.095, allocations: 1.032 MB / 0.9603 GB, free: 101.1 MB / 0.7325 GB
Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.03205/1.127, allocations: 19.26 MB / 0.9791 GB, free: 89.8 MB / 0.7325 GB
Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.004627/1.131, allocations: 0.5866 MB / 0.9797 GB, free: 89.51 MB / 0.7325 GB
Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0005709/1.132, allocations: 156.6 kB / 0.9798 GB, free: 89.48 MB / 0.7325 GB
Notification: Performance of prepare postOptimizeDAE: time 1.355e-05/1.132, allocations: 3.969 kB / 0.9798 GB, free: 89.48 MB / 0.7325 GB
Notification: Performance of postOpt replaceHomotopyWithSimplified (initialization): time 0.01969/1.152, allocations: 8.174 MB / 0.9878 GB, free: 83.5 MB / 0.7325 GB
Notification: Performance of postOpt simplifyComplexFunction (initialization): time 0.00016/1.152, allocations: 32 kB / 0.9878 GB, free: 83.46 MB / 0.7325 GB
Notification: Performance of postOpt tearingSystem (initialization): time 0.01237/1.164, allocations: 3.416 MB / 0.9912 GB, free: 80.04 MB / 0.7325 GB
Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.004797/1.169, allocations: 1.144 MB / 0.9923 GB, free: 78.9 MB / 0.7325 GB
Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.01612/1.185, allocations: 10.6 MB / 1.003 GB, free: 68.15 MB / 0.7325 GB
Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.004332/1.19, allocations: 0.5381 MB / 1.003 GB, free: 67.61 MB / 0.7325 GB
Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0005748/1.19, allocations: 168.7 kB / 1.003 GB, free: 67.45 MB / 0.7325 GB
Notification: Model statistics after passing the back-end for initialization:
 * Number of independent subsystems: 159
 * 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 (330):
 * Single equations (assignments): 328
 * 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: 2
 * Mixed (continuous/discrete) equation systems: 0
Notification: Torn system details for strict tearing set:
 * Linear torn systems: 1 {(6,100.0%) 30}
 * Non-linear torn systems: 1 {6 30}
Notification: Performance of prepare postOptimizeDAE: time 0.003409/1.194, allocations: 1.686 MB / 1.005 GB, free: 65.75 MB / 0.7325 GB
Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0006282/1.194, allocations: 199.2 kB / 1.005 GB, free: 65.55 MB / 0.7325 GB
Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.02154/1.216, allocations: 8.671 MB / 1.014 GB, free: 56.85 MB / 0.7325 GB
Notification: Performance of postOpt inlineArrayEqn (simulation): time 3.665e-05/1.216, allocations: 24 kB / 1.014 GB, free: 56.82 MB / 0.7325 GB
Notification: Performance of postOpt constantLinearSystem (simulation): time 1.614e-05/1.216, allocations: 8 kB / 1.014 GB, free: 56.82 MB / 0.7325 GB
Notification: Performance of postOpt simplifysemiLinear (simulation): time 5.157e-05/1.216, allocations: 11.97 kB / 1.014 GB, free: 56.8 MB / 0.7325 GB
Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.031/1.247, allocations: 13.97 MB / 1.027 GB, free: 42.73 MB / 0.7325 GB
Notification: Performance of postOpt simplifyComplexFunction (simulation): time 2.586e-05/1.247, allocations: 11.61 kB / 1.027 GB, free: 42.73 MB / 0.7325 GB
Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.00302/1.25, allocations: 0.7222 MB / 1.028 GB, free: 42 MB / 0.7325 GB
Notification: Performance of postOpt tearingSystem (simulation): time 0.01731/1.268, allocations: 5.103 MB / 1.033 GB, free: 36.89 MB / 0.7325 GB
Notification: Performance of postOpt inputDerivativesUsed (simulation): time 0.0004391/1.268, allocations: 67.61 kB / 1.033 GB, free: 36.83 MB / 0.7325 GB
Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.02625/1.294, allocations: 18.21 MB / 1.051 GB, free: 18.35 MB / 0.7325 GB
Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 6.913e-06/1.294, allocations: 11.94 kB / 1.051 GB, free: 18.34 MB / 0.7325 GB
Notification: Performance of postOpt symbolicJacobian (simulation): time 0.02041/1.315, allocations: 9.216 MB / 1.06 GB, free: 8.75 MB / 0.7325 GB
Notification: Performance of postOpt removeConstants (simulation): time 0.001905/1.317, allocations: 0.6468 MB / 1.061 GB, free: 8.082 MB / 0.7325 GB
Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0004776/1.317, allocations: 48 kB / 1.061 GB, free: 8.035 MB / 0.7325 GB
Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.003136/1.32, allocations: 0.4952 MB / 1.061 GB, free: 7.539 MB / 0.7325 GB
Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0005375/1.321, allocations: 185.5 kB / 1.061 GB, free: 7.355 MB / 0.7325 GB
Notification: Performance of postOpt collapseArrayExpressions (simulation): time 0.0001658/1.321, allocations: 83.95 kB / 1.061 GB, free: 7.273 MB / 0.7325 GB
Notification: Performance of sorting global known variables: time 0.001248/1.322, allocations: 1.083 MB / 1.062 GB, free: 6.191 MB / 0.7325 GB
Notification: Performance of sort global known variables: time 1.51e-07/1.322, allocations: 0 / 1.062 GB, free: 6.191 MB / 0.7325 GB
Notification: Performance of remove unused functions: time 0.005101/1.327, allocations: 1.738 MB / 1.064 GB, free: 4.453 MB / 0.7325 GB
Notification: Model statistics after passing the back-end for simulation:
 * Number of independent subsystems: 34
 * 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 (154):
 * Single equations (assignments): 152
 * 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: 2
 * Mixed (continuous/discrete) equation systems: 0
Notification: Torn system details for strict tearing set:
 * Linear torn systems: 1 {(6,100.0%) 30}
 * Non-linear torn systems: 1 {6 30}
Notification: Performance of Backend phase and start with SimCode phase: time 0.0003506/1.328, allocations: 164.8 kB / 1.064 GB, free: 4.281 MB / 0.7325 GB
Notification: Performance of simCode: created initialization part: time 0.0248/1.353, allocations: 10.69 MB / 1.075 GB, free: 9.562 MB / 0.7481 GB
Notification: Performance of simCode: created event and clocks part: time 1.233e-05/1.353, allocations: 3.938 kB / 1.075 GB, free: 9.559 MB / 0.7481 GB
Notification: Performance of simCode: created simulation system equations: time 0.01026/1.363, allocations: 3.777 MB / 1.078 GB, free: 5.766 MB / 0.7481 GB
Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.001997/1.365, allocations: 235.1 kB / 1.079 GB, free: 5.543 MB / 0.7481 GB
Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.02102/1.386, allocations: 9.751 MB / 1.088 GB, free: 11.67 MB / 0.7637 GB
Notification: Performance of simCode: some other stuff during SimCode phase: time 0.004108/1.39, allocations: 2.982 MB / 1.091 GB, free: 8.656 MB / 0.7637 GB
Notification: Performance of simCode: alias equations: time 0.00522/1.395, allocations: 1.68 MB / 1.093 GB, free: 6.98 MB / 0.7637 GB
Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0005945/1.396, allocations: 171.3 kB / 1.093 GB, free: 6.812 MB / 0.7637 GB
Notification: Performance of SimCode: time 7.61e-07/1.396, allocations: 0 / 1.093 GB, free: 6.812 MB / 0.7637 GB
Notification: Performance of Templates: time 0.08624/1.482, allocations: 59.5 MB / 1.151 GB, free: 11.47 MB / 0.8262 GB
make -j1 -f Buildings_8_Buildings.Electrical.AC.ThreePhasesUnbalanced.Validation.IEEETests.Test4NodesFeeder.UnbalancedStepDown.YY.makefile
Environment - environmentSimulation:
(rm -f Buildings_8_Buildings.Electrical.AC.ThreePhasesUnbalanced.Validation.IEEETests.Test4NodesFeeder.UnbalancedStepDown.YY.pipe ; mkfifo Buildings_8_Buildings.Electrical.AC.ThreePhasesUnbalanced.Validation.IEEETests.Test4NodesFeeder.UnbalancedStepDown.YY.pipe ; head -c 1048576 < Buildings_8_Buildings.Electrical.AC.ThreePhasesUnbalanced.Validation.IEEETests.Test4NodesFeeder.UnbalancedStepDown.YY.pipe >> ../files/Buildings_8_Buildings.Electrical.AC.ThreePhasesUnbalanced.Validation.IEEETests.Test4NodesFeeder.UnbalancedStepDown.YY.sim & ./Buildings_8_Buildings.Electrical.AC.ThreePhasesUnbalanced.Validation.IEEETests.Test4NodesFeeder.UnbalancedStepDown.YY  -abortSlowSimulation -alarm=480 -lv LOG_STATS > Buildings_8_Buildings.Electrical.AC.ThreePhasesUnbalanced.Validation.IEEETests.Test4NodesFeeder.UnbalancedStepDown.YY.pipe 2>&1)
Environment - environmentSimulation: