Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries/ --ompython_omhome=/usr IDEAS_dev_IDEAS.Controls.Continuous.Validation.LimPIDReset.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.Controls.Continuous.Validation.LimPIDReset,fileNamePrefix="IDEAS_dev_IDEAS_Controls_Continuous_Validation_LimPIDReset",fmuType="me",version="2.0",platforms={"static"}) "" <> buildModelFMU(IDEAS.Controls.Continuous.Validation.LimPIDReset,fileNamePrefix="IDEAS_dev_IDEAS_Controls_Continuous_Validation_LimPIDReset",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 0.001265/0.001265, allocations: 107.4 kB / 15.22 MB, free: 0.6562 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.001275/0.001275, allocations: 198 kB / 16.14 MB, free: 6.57 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo): time 1.254/1.254, allocations: 222.9 MB / 239.8 MB, free: 4.5 MB / 190.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/IDEAS 3.0.0-master/package.mo): time 0.8626/0.8626, allocations: 135.1 MB / 425.1 MB, free: 11.79 MB / 350.1 MB Notification: Performance of FrontEnd - loaded program: time 0.001115/0.001115, allocations: 61.06 kB / 0.5048 GB, free: 5.688 MB / 414.1 MB Notification: Performance of FrontEnd - Absyn->SCode: time 0.1255/0.1266, allocations: 80.92 MB / 0.5838 GB, free: 4.938 MB / 494.1 MB Notification: Performance of NFInst.instantiate(IDEAS.Controls.Continuous.Validation.LimPIDReset): time 0.005075/0.1317, allocations: 4.318 MB / 0.588 GB, free: 0.5898 MB / 494.1 MB Notification: Performance of NFInst.instExpressions: time 0.002617/0.1344, allocations: 1.539 MB / 0.5895 GB, free: 15.04 MB / 0.4981 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.0005876/0.135, allocations: 35.81 kB / 0.5896 GB, free: 15.01 MB / 0.4981 GB Notification: Performance of NFTyping.typeComponents: time 0.0004276/0.1354, allocations: 118.8 kB / 0.5897 GB, free: 14.89 MB / 0.4981 GB Notification: Performance of NFTyping.typeBindings: time 0.0006518/0.1361, allocations: 189.9 kB / 0.5898 GB, free: 14.71 MB / 0.4981 GB Notification: Performance of NFTyping.typeClassSections: time 0.001167/0.1373, allocations: 0.6113 MB / 0.5904 GB, free: 14.11 MB / 0.4981 GB Notification: Performance of NFFlatten.flatten: time 0.001107/0.1384, allocations: 1.148 MB / 0.5916 GB, free: 12.96 MB / 0.4981 GB Notification: Performance of NFFlatten.resolveConnections: time 0.0006296/0.139, allocations: 496.1 kB / 0.592 GB, free: 12.45 MB / 0.4981 GB Notification: Performance of NFEvalConstants.evaluate: time 0.0004957/0.1395, allocations: 413.8 kB / 0.5924 GB, free: 12.04 MB / 0.4981 GB Notification: Performance of NFSimplifyModel.simplify: time 0.0004066/0.1399, allocations: 421.4 kB / 0.5928 GB, free: 11.63 MB / 0.4981 GB Notification: Performance of NFPackage.collectConstants: time 0.0001204/0.1401, allocations: 48 kB / 0.5929 GB, free: 11.58 MB / 0.4981 GB Notification: Performance of NFFlatten.collectFunctions: time 0.0001029/0.1402, allocations: 55.94 kB / 0.5929 GB, free: 11.53 MB / 0.4981 GB Notification: Performance of NFScalarize.scalarize: time 0.0001404/0.1403, allocations: 179.1 kB / 0.5931 GB, free: 11.35 MB / 0.4981 GB Notification: Performance of NFVerifyModel.verify: time 0.0003265/0.1406, allocations: 437 kB / 0.5935 GB, free: 10.92 MB / 0.4981 GB Notification: Performance of NFConvertDAE.convert: time 0.0007339/0.1414, allocations: 1.047 MB / 0.5945 GB, free: 9.871 MB / 0.4981 GB Notification: Performance of FrontEnd - DAE generated: time 4.519e-06/0.1414, allocations: 7.922 kB / 0.5945 GB, free: 9.863 MB / 0.4981 GB Notification: Performance of FrontEnd: time 6.61e-07/0.1414, allocations: 0 / 0.5945 GB, free: 9.863 MB / 0.4981 GB Notification: Performance of Transformations before backend: time 2.204e-05/0.1414, allocations: 4 kB / 0.5946 GB, free: 9.859 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: 168 * Number of variables: 168 Notification: Performance of Generate backend data structure: time 0.002221/0.1437, allocations: 1.403 MB / 0.5959 GB, free: 8.402 MB / 0.4981 GB Notification: Performance of prepare preOptimizeDAE: time 3.385e-05/0.1437, allocations: 8.031 kB / 0.5959 GB, free: 8.395 MB / 0.4981 GB Notification: Performance of preOpt introduceOutputAliases (simulation): time 0.0001249/0.1438, allocations: 114.7 kB / 0.596 GB, free: 8.273 MB / 0.4981 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.0001684/0.144, allocations: 123.4 kB / 0.5962 GB, free: 8.152 MB / 0.4981 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.001038/0.145, allocations: 0.7197 MB / 0.5969 GB, free: 7.391 MB / 0.4981 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 8.111e-05/0.1451, allocations: 88.25 kB / 0.5969 GB, free: 7.301 MB / 0.4981 GB Notification: Performance of preOpt expandDerOperator (simulation): time 8.596e-05/0.1452, allocations: 80.22 kB / 0.597 GB, free: 7.223 MB / 0.4981 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.001152/0.1464, allocations: 0.7328 MB / 0.5977 GB, free: 6.449 MB / 0.4981 GB Notification: Performance of preOpt findStateOrder (simulation): time 1.29e-05/0.1464, allocations: 0 / 0.5977 GB, free: 6.449 MB / 0.4981 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 5.514e-05/0.1465, allocations: 24 kB / 0.5978 GB, free: 6.426 MB / 0.4981 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 1.439e-05/0.1465, allocations: 16 kB / 0.5978 GB, free: 6.41 MB / 0.4981 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.001025/0.1475, allocations: 0.5165 MB / 0.5983 GB, free: 5.895 MB / 0.4981 GB Notification: Performance of preOpt removeSimpleEquations (simulation): time 0.002948/0.1505, allocations: 2.275 MB / 0.6005 GB, free: 3.551 MB / 0.4981 GB Notification: Performance of preOpt comSubExp (simulation): time 0.001291/0.1518, allocations: 0.6154 MB / 0.6011 GB, free: 2.926 MB / 0.4981 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.0004802/0.1523, allocations: 274.4 kB / 0.6014 GB, free: 2.652 MB / 0.4981 GB Notification: Performance of preOpt evalFunc (simulation): time 3.967e-05/0.1523, allocations: 8.562 kB / 0.6014 GB, free: 2.645 MB / 0.4981 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 0.0006352/0.153, allocations: 323 kB / 0.6017 GB, free: 2.32 MB / 0.4981 GB Notification: Performance of pre-optimization done (n=60): time 1.933e-06/0.153, allocations: 0 / 0.6017 GB, free: 2.32 MB / 0.4981 GB Notification: Performance of matching and sorting (n=60): time 0.001465/0.1544, allocations: 0.7555 MB / 0.6024 GB, free: 1.559 MB / 0.4981 GB Notification: Performance of inlineWhenForInitialization (initialization): time 4.651e-05/0.1545, allocations: 89.61 kB / 0.6025 GB, free: 1.453 MB / 0.4981 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.0007749/0.1553, allocations: 0.7478 MB / 0.6032 GB, free: 0.6953 MB / 0.4981 GB Notification: Performance of collectPreVariables (initialization): time 5.467e-05/0.1553, allocations: 41.7 kB / 0.6033 GB, free: 0.6484 MB / 0.4981 GB Notification: Performance of collectInitialEqns (initialization): time 0.0002875/0.1556, allocations: 444.4 kB / 0.6037 GB, free: 212 kB / 0.4981 GB Notification: Performance of collectInitialBindings (initialization): time 0.0001347/0.1558, allocations: 201.1 kB / 0.6039 GB, free: 8 kB / 0.4981 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.2249/0.3807, allocations: 110.9 kB / 0.604 GB, free: 52.05 MB / 0.4981 GB Notification: Performance of setup shared object (initialization): time 6.209e-05/0.3808, allocations: 332.4 kB / 0.6043 GB, free: 51.74 MB / 0.4981 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0005325/0.3813, allocations: 203.1 kB / 0.6045 GB, free: 51.73 MB / 0.4981 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.0004661/0.3818, allocations: 304.8 kB / 0.6048 GB, free: 51.64 MB / 0.4981 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.0007883/0.3826, allocations: 0.5068 MB / 0.6053 GB, free: 51.57 MB / 0.4981 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 4.539e-06/0.3826, allocations: 3.062 kB / 0.6053 GB, free: 51.57 MB / 0.4981 GB Notification: Performance of matching and sorting (n=76) (initialization): time 0.001131/0.3838, allocations: 0.6542 MB / 0.6059 GB, free: 51.52 MB / 0.4981 GB Notification: Performance of prepare postOptimizeDAE: time 1.755e-05/0.3838, allocations: 9.75 kB / 0.6059 GB, free: 51.52 MB / 0.4981 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 8.536e-06/0.3838, allocations: 3.438 kB / 0.6059 GB, free: 51.52 MB / 0.4981 GB Notification: Performance of postOpt tearingSystem (initialization): time 1.91e-05/0.3838, allocations: 5.812 kB / 0.606 GB, free: 51.52 MB / 0.4981 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0005961/0.3844, allocations: 151 kB / 0.6061 GB, free: 51.52 MB / 0.4981 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 1.014e-05/0.3844, allocations: 9.281 kB / 0.6061 GB, free: 51.52 MB / 0.4981 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0003942/0.3848, allocations: 70.8 kB / 0.6062 GB, free: 51.52 MB / 0.4981 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 3.529e-05/0.3849, allocations: 20.22 kB / 0.6062 GB, free: 51.52 MB / 0.4981 GB Notification: Performance of preBalanceInitialSystem (initialization_lambda0): time 0.0005319/0.3854, allocations: 354.2 kB / 0.6065 GB, free: 51.43 MB / 0.4981 GB Notification: Performance of partitionIndependentBlocks (initialization_lambda0): time 0.000368/0.3858, allocations: 294.9 kB / 0.6068 GB, free: 51.34 MB / 0.4981 GB Notification: Performance of analyzeInitialSystem (initialization_lambda0): time 0.0007145/0.3865, allocations: 496.2 kB / 0.6073 GB, free: 51.07 MB / 0.4981 GB Notification: Performance of solveInitialSystemEqSystem (initialization_lambda0): time 1.683e-06/0.3865, allocations: 0 / 0.6073 GB, free: 51.07 MB / 0.4981 GB Notification: Performance of matching and sorting (n=76) (initialization_lambda0): time 0.000921/0.3875, allocations: 0.6301 MB / 0.6079 GB, free: 50.86 MB / 0.4981 GB Notification: Performance of prepare postOptimizeDAE: time 7.464e-06/0.3875, allocations: 6.594 kB / 0.6079 GB, free: 50.86 MB / 0.4981 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 3.677e-06/0.3875, allocations: 0.5625 kB / 0.6079 GB, free: 50.86 MB / 0.4981 GB Notification: Performance of postOpt tearingSystem (initialization): time 5.14e-06/0.3875, allocations: 6.531 kB / 0.6079 GB, free: 50.86 MB / 0.4981 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0005388/0.388, allocations: 143.3 kB / 0.608 GB, free: 50.85 MB / 0.4981 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 7.775e-06/0.3881, allocations: 18.19 kB / 0.6081 GB, free: 50.85 MB / 0.4981 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.000344/0.3884, allocations: 51.72 kB / 0.6081 GB, free: 50.84 MB / 0.4981 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 3.179e-05/0.3884, allocations: 24.41 kB / 0.6081 GB, free: 50.84 MB / 0.4981 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 10 * Number of states: 0 () * Number of discrete variables: 7 ($whenCondition1,trigger.pulseStart,$PRE.trigger.pulseStart,trigger.y,$whenCondition2,limPIDOri.I.local_reset,limPIDDef.I.trigger_internal) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (76): * Single equations (assignments): 76 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 0 * Torn equation systems: 0 * Mixed (continuous/discrete) equation systems: 0 Notification: Performance of prepare postOptimizeDAE: time 0.0001366/0.3886, allocations: 216.1 kB / 0.6083 GB, free: 50.64 MB / 0.4981 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 9.414e-05/0.3887, allocations: 99.73 kB / 0.6084 GB, free: 50.62 MB / 0.4981 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.000166/0.3889, allocations: 101.2 kB / 0.6085 GB, free: 50.56 MB / 0.4981 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 7.174e-06/0.3889, allocations: 11.56 kB / 0.6085 GB, free: 50.55 MB / 0.4981 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 7.013e-06/0.3889, allocations: 1.312 kB / 0.6085 GB, free: 50.55 MB / 0.4981 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 5.551e-06/0.3889, allocations: 3.375 kB / 0.6086 GB, free: 50.55 MB / 0.4981 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.001678/0.3906, allocations: 1.441 MB / 0.61 GB, free: 49.83 MB / 0.4981 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 2.354e-06/0.3906, allocations: 0 / 0.61 GB, free: 49.83 MB / 0.4981 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0004955/0.3911, allocations: 106.3 kB / 0.6101 GB, free: 49.83 MB / 0.4981 GB Notification: Performance of postOpt tearingSystem (simulation): time 2.736e-06/0.3911, allocations: 3.281 kB / 0.6101 GB, free: 49.83 MB / 0.4981 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 3.349e-05/0.3911, allocations: 11.03 kB / 0.6101 GB, free: 49.82 MB / 0.4981 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 2.985e-06/0.3911, allocations: 2.938 kB / 0.6101 GB, free: 49.82 MB / 0.4981 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 1.583e-06/0.3911, allocations: 2.188 kB / 0.6101 GB, free: 49.82 MB / 0.4981 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.001347/0.3925, allocations: 0.9705 MB / 0.611 GB, free: 49.34 MB / 0.4981 GB Notification: Performance of postOpt removeConstants (simulation): time 0.0001775/0.3927, allocations: 223.8 kB / 0.6112 GB, free: 49.16 MB / 0.4981 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 8.292e-05/0.3928, allocations: 10.88 kB / 0.6112 GB, free: 49.16 MB / 0.4981 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0004067/0.3932, allocations: 35.36 kB / 0.6113 GB, free: 49.15 MB / 0.4981 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 7.308e-05/0.3933, allocations: 39.28 kB / 0.6113 GB, free: 49.14 MB / 0.4981 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 3.381e-05/0.3933, allocations: 18.98 kB / 0.6113 GB, free: 49.13 MB / 0.4981 GB Notification: Performance of sorting global known variables: time 0.0004583/0.3938, allocations: 0.5162 MB / 0.6118 GB, free: 48.91 MB / 0.4981 GB Notification: Performance of sort global known variables: time 1.2e-07/0.3938, allocations: 0 / 0.6118 GB, free: 48.91 MB / 0.4981 GB Notification: Performance of remove unused functions: time 0.0005748/0.3944, allocations: 271.3 kB / 0.6121 GB, free: 48.84 MB / 0.4981 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 1 * Number of states: 8 (limPIDPar.I.y,limPIDPar.D.x,limPIDDef.I.y,limPIDDef.D.x,limPIDInp.I.y,limPIDInp.D.x,limPIDOri.I.y,limPIDOri.D.x) * Number of discrete variables: 4 (trigger.y,$whenCondition2,$whenCondition1,trigger.pulseStart) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for simulation (60): * Single equations (assignments): 59 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 1 * If-equations: 0 * Equation systems (not torn): 0 * Torn equation systems: 0 * Mixed (continuous/discrete) equation systems: 0 Notification: Performance of Backend phase and start with SimCode phase: time 0.001494/0.3959, allocations: 1.527 MB / 0.6136 GB, free: 47.82 MB / 0.4981 GB Notification: Performance of simCode: created initialization part: time 0.001236/0.3971, allocations: 0.7965 MB / 0.6144 GB, free: 47.58 MB / 0.4981 GB Notification: Performance of simCode: created event and clocks part: time 2.354e-06/0.3971, allocations: 128 / 0.6144 GB, free: 47.58 MB / 0.4981 GB Notification: Performance of simCode: created simulation system equations: time 0.0004076/0.3975, allocations: 270.6 kB / 0.6146 GB, free: 47.5 MB / 0.4981 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.0009735/0.3985, allocations: 243.9 kB / 0.6149 GB, free: 47.43 MB / 0.4981 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.007594/0.4061, allocations: 7.272 MB / 0.622 GB, free: 43.17 MB / 0.4981 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0002859/0.4064, allocations: 0.9898 MB / 0.6229 GB, free: 42.46 MB / 0.4981 GB Notification: Performance of simCode: alias equations: time 0.0004281/0.4068, allocations: 121.9 kB / 0.623 GB, free: 42.43 MB / 0.4981 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0003451/0.4072, allocations: 350.7 kB / 0.6234 GB, free: 42.17 MB / 0.4981 GB Notification: Performance of SimCode: time 3.11e-07/0.4072, allocations: 0 / 0.6234 GB, free: 42.17 MB / 0.4981 GB Notification: Performance of buildModelFMU: Generate the FMI files: time 0.872/1.279, allocations: 16.56 MB / 0.6395 GB, free: 41 MB / 0.4981 GB Notification: Performance of buildModelFMU: configured platform static using cached values: time 0.0001598/1.279, allocations: 191.9 kB / 0.6397 GB, free: 40.75 MB / 0.4981 GB Notification: Performance of buildModelFMU: Generate platform static: time 2.331/3.61, allocations: 0 / 0.6397 GB, free: 40.75 MB / 0.4981 GB (rm -f IDEAS_dev_IDEAS.Controls.Continuous.Validation.LimPIDReset.pipe ; mkfifo IDEAS_dev_IDEAS.Controls.Continuous.Validation.LimPIDReset.pipe ; head -c 1048576 < IDEAS_dev_IDEAS.Controls.Continuous.Validation.LimPIDReset.pipe >> ../files/IDEAS_dev_IDEAS.Controls.Continuous.Validation.LimPIDReset.sim & /home/hudson/saved_omc/OMSimulator/install/bin/OMSimulator --tempDir=temp_IDEAS_dev_IDEAS_Controls_Continuous_Validation_LimPIDReset_fmu --startTime=0 --stopTime=1 --timeout=50 --tolerance=1e-06 IDEAS_dev_IDEAS_Controls_Continuous_Validation_LimPIDReset.fmu > IDEAS_dev_IDEAS.Controls.Continuous.Validation.LimPIDReset.pipe 2>&1)