Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr OpenIPSL_dev_OpenIPSL.Examples.OpenCPS.Network_Expanded.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: translateModel(OpenIPSL.Examples.OpenCPS.Network_Expanded,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="OpenIPSL_dev_OpenIPSL.Examples.OpenCPS.Network_Expanded") translateModel(OpenIPSL.Examples.OpenCPS.Network_Expanded,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="OpenIPSL_dev_OpenIPSL.Examples.OpenCPS.Network_Expanded") Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.001282/0.001282, allocations: 111.9 kB / 16.42 MB, free: 6.453 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo): time 1.364/1.364, allocations: 222.9 MB / 240.1 MB, free: 4.484 MB / 190.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.001396/0.001396, allocations: 192.5 kB / 290.4 MB, free: 2.199 MB / 238.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/OpenIPSL 3.1.0-master/package.mo): time 0.4972/0.4972, allocations: 91.9 MB / 432.4 MB, free: 9.172 MB / 302.1 MB Notification: Performance of FrontEnd - loaded program: time 0.001472/0.001472, allocations: 76.41 kB / 0.5734 GB, free: 33.46 MB / 430.1 MB Notification: Performance of FrontEnd - Absyn->SCode: time 0.1325/0.1339, allocations: 71.28 MB / 0.643 GB, free: 3.609 MB / 446.1 MB Notification: Performance of NFInst.instantiate(OpenIPSL.Examples.OpenCPS.Network_Expanded): time 0.01481/0.1488, allocations: 15.44 MB / 0.6581 GB, free: 4.094 MB / 462.1 MB Notification: Performance of NFInst.instExpressions: time 0.01002/0.1588, allocations: 4.956 MB / 0.6629 GB, free: 15.13 MB / 478.1 MB Notification: Performance of NFInst.updateImplicitVariability: time 0.002993/0.1619, allocations: 43.94 kB / 0.6629 GB, free: 15.09 MB / 478.1 MB Notification: Performance of NFTyping.typeComponents: time 0.002087/0.164, allocations: 0.6852 MB / 0.6636 GB, free: 14.39 MB / 478.1 MB Notification: Performance of NFTyping.typeBindings: time 0.005577/0.1696, allocations: 1.835 MB / 0.6654 GB, free: 12.55 MB / 478.1 MB Notification: Performance of NFTyping.typeClassSections: time 0.004178/0.1738, allocations: 1.971 MB / 0.6673 GB, free: 10.59 MB / 478.1 MB Notification: Performance of NFFlatten.flatten: time 0.007227/0.181, allocations: 5.619 MB / 0.6728 GB, free: 4.961 MB / 478.1 MB Notification: Performance of NFFlatten.resolveConnections: time 0.003094/0.1842, allocations: 1.679 MB / 0.6745 GB, free: 3.215 MB / 478.1 MB Notification: Performance of NFEvalConstants.evaluate: time 0.003281/0.1875, allocations: 2.102 MB / 0.6765 GB, free: 1.105 MB / 478.1 MB Notification: Performance of NFSimplifyModel.simplify: time 0.003651/0.1911, allocations: 2.571 MB / 0.679 GB, free: 14.52 MB / 494.1 MB Notification: Performance of NFPackage.collectConstants: time 0.001744/0.1929, allocations: 0.5742 MB / 0.6796 GB, free: 13.95 MB / 494.1 MB Notification: Performance of NFFlatten.collectFunctions: time 0.002212/0.1951, allocations: 0.8356 MB / 0.6804 GB, free: 13.11 MB / 494.1 MB Notification: Performance of NFScalarize.scalarize: time 0.001697/0.1969, allocations: 1.191 MB / 0.6816 GB, free: 11.92 MB / 494.1 MB Notification: Performance of NFVerifyModel.verify: time 0.00345/0.2003, allocations: 2.312 MB / 0.6838 GB, free: 9.594 MB / 494.1 MB Notification: Performance of NFConvertDAE.convert: time 0.008171/0.2085, allocations: 6.74 MB / 0.6904 GB, free: 2.832 MB / 494.1 MB Notification: Performance of FrontEnd - DAE generated: time 7.103e-06/0.2086, allocations: 0 / 0.6904 GB, free: 2.832 MB / 494.1 MB Notification: Performance of FrontEnd: time 1.843e-06/0.2086, allocations: 0 / 0.6904 GB, free: 2.832 MB / 494.1 MB Notification: Performance of Transformations before backend: time 0.0002233/0.2088, allocations: 0 / 0.6904 GB, free: 2.832 MB / 494.1 MB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 681 * Number of variables: 681 Notification: Performance of Generate backend data structure: time 0.02994/0.2388, allocations: 7.249 MB / 0.6975 GB, free: 11.49 MB / 0.4981 GB Notification: Performance of prepare preOptimizeDAE: time 5.682e-05/0.2388, allocations: 12.03 kB / 0.6975 GB, free: 11.48 MB / 0.4981 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.006271/0.2451, allocations: 1.029 MB / 0.6985 GB, free: 10.45 MB / 0.4981 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.006339/0.2515, allocations: 2.595 MB / 0.701 GB, free: 7.789 MB / 0.4981 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.001052/0.2526, allocations: 0.8167 MB / 0.7018 GB, free: 6.844 MB / 0.4981 GB Notification: Performance of preOpt expandDerOperator (simulation): time 0.001201/0.2538, allocations: 315.8 kB / 0.7021 GB, free: 6.535 MB / 0.4981 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.009635/0.2635, allocations: 3.389 MB / 0.7054 GB, free: 3.043 MB / 0.4981 GB Notification: Performance of preOpt findStateOrder (simulation): time 8.492e-05/0.2636, allocations: 7.938 kB / 0.7054 GB, free: 3.035 MB / 0.4981 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.0006497/0.2642, allocations: 108 kB / 0.7055 GB, free: 2.93 MB / 0.4981 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 5.222e-05/0.2643, allocations: 64 kB / 0.7056 GB, free: 2.867 MB / 0.4981 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.00813/0.2724, allocations: 3.058 MB / 0.7086 GB, free: 15.8 MB / 0.5137 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 0.03035/0.3028, allocations: 13.7 MB / 0.722 GB, free: 1.578 MB / 0.5137 GB Notification: Performance of preOpt comSubExp (simulation): time 0.008837/0.3117, allocations: 4.153 MB / 0.726 GB, free: 13.26 MB / 0.5294 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.003964/0.3157, allocations: 1.67 MB / 0.7277 GB, free: 11.57 MB / 0.5294 GB Notification: Performance of preOpt evalFunc (simulation): time 0.0003481/0.3161, allocations: 42.03 kB / 0.7277 GB, free: 11.52 MB / 0.5294 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 0.004813/0.3209, allocations: 2.024 MB / 0.7297 GB, free: 9.434 MB / 0.5294 GB Notification: Performance of pre-optimization done (n=273): time 6.863e-06/0.3209, allocations: 0 / 0.7297 GB, free: 9.434 MB / 0.5294 GB Notification: Performance of matching and sorting (n=277): time 0.09053/0.4115, allocations: 23.41 MB / 0.7525 GB, free: 1.781 MB / 0.545 GB Notification: Performance of inlineWhenForInitialization (initialization): time 0.0001321/0.4116, allocations: 269.6 kB / 0.7528 GB, free: 1.461 MB / 0.545 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.006567/0.4182, allocations: 3.219 MB / 0.7559 GB, free: 14.25 MB / 0.5606 GB Notification: Performance of collectPreVariables (initialization): time 0.0008618/0.4191, allocations: 97.7 kB / 0.756 GB, free: 14.14 MB / 0.5606 GB Notification: Performance of collectInitialEqns (initialization): time 0.001577/0.4207, allocations: 1.444 MB / 0.7574 GB, free: 12.68 MB / 0.5606 GB Notification: Performance of collectInitialBindings (initialization): time 0.001546/0.4223, allocations: 0.9514 MB / 0.7584 GB, free: 11.72 MB / 0.5606 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.002801/0.4251, allocations: 0.7522 MB / 0.7591 GB, free: 10.95 MB / 0.5606 GB Notification: Performance of setup shared object (initialization): time 9.392e-05/0.4252, allocations: 305.1 kB / 0.7594 GB, free: 10.65 MB / 0.5606 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.00499/0.4302, allocations: 1.982 MB / 0.7613 GB, free: 8.648 MB / 0.5606 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.005488/0.4357, allocations: 2.405 MB / 0.7637 GB, free: 6.129 MB / 0.5606 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.3545/0.7902, allocations: 11.48 MB / 0.7749 GB, free: 106.4 MB / 0.5606 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 9.969e-06/0.7903, allocations: 1.75 kB / 0.7749 GB, free: 106.4 MB / 0.5606 GB Notification: Performance of matching and sorting (n=529) (initialization): time 0.01587/0.8062, allocations: 6.302 MB / 0.781 GB, free: 105.4 MB / 0.5606 GB Notification: Performance of prepare postOptimizeDAE: time 6.503e-05/0.8063, allocations: 67.5 kB / 0.7811 GB, free: 105.4 MB / 0.5606 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 2.038e-05/0.8063, allocations: 7.844 kB / 0.7811 GB, free: 105.4 MB / 0.5606 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.01322/0.8195, allocations: 3.651 MB / 0.7847 GB, free: 104.7 MB / 0.5606 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.003122/0.8227, allocations: 0.6205 MB / 0.7853 GB, free: 104.7 MB / 0.5606 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.01293/0.8356, allocations: 6.274 MB / 0.7914 GB, free: 101.2 MB / 0.5606 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.004563/0.8402, allocations: 303.6 kB / 0.7917 GB, free: 101.1 MB / 0.5606 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0006429/0.8409, allocations: 137.4 kB / 0.7918 GB, free: 101.1 MB / 0.5606 GB Warning: Assuming fixed start value for the following 2 variables: G2.central_Unit.freq_ctrl.fREQ_CALC.derivative.x:VARIABLE(start = G2.central_Unit.freq_ctrl.fREQ_CALC.derivative.x_start fixed = true ) "State of block" type: Real G2.central_Unit.freq_ctrl.fREQ_CALC.firstOrder.y:VARIABLE(flow=false start = G2.central_Unit.freq_ctrl.fREQ_CALC.firstOrder.y_start fixed = true ) "Connector of Real output signal" type: Real Notification: Performance of preBalanceInitialSystem (initialization_lambda0): time 0.005586/0.8465, allocations: 2.508 MB / 0.7943 GB, free: 99.91 MB / 0.5606 GB Notification: Performance of partitionIndependentBlocks (initialization_lambda0): time 0.004558/0.8511, allocations: 2.377 MB / 0.7966 GB, free: 98.75 MB / 0.5606 GB Notification: Performance of analyzeInitialSystem (initialization_lambda0): time 0.04101/0.8921, allocations: 11.41 MB / 0.8078 GB, free: 91.78 MB / 0.5606 GB Notification: Performance of solveInitialSystemEqSystem (initialization_lambda0): time 1.603e-05/0.8922, allocations: 4 kB / 0.8078 GB, free: 91.77 MB / 0.5606 GB Notification: Performance of matching and sorting (n=529) (initialization_lambda0): time 0.01567/0.9079, allocations: 6.182 MB / 0.8138 GB, free: 85.76 MB / 0.5606 GB Notification: Performance of prepare postOptimizeDAE: time 6.175e-05/0.908, allocations: 71.39 kB / 0.8139 GB, free: 85.68 MB / 0.5606 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.931e-05/0.908, allocations: 7.938 kB / 0.8139 GB, free: 85.67 MB / 0.5606 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.01293/0.9209, allocations: 3.647 MB / 0.8174 GB, free: 82.03 MB / 0.5606 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.003164/0.9241, allocations: 0.6159 MB / 0.818 GB, free: 81.41 MB / 0.5606 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.01263/0.9368, allocations: 6.283 MB / 0.8242 GB, free: 75.06 MB / 0.5606 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.004894/0.9417, allocations: 299.8 kB / 0.8245 GB, free: 74.77 MB / 0.5606 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0008064/0.9426, allocations: 136 kB / 0.8246 GB, free: 74.63 MB / 0.5606 GB Warning: Assuming fixed start value for the following 2 variables: G2.central_Unit.freq_ctrl.fREQ_CALC.derivative.x:VARIABLE(start = G2.central_Unit.freq_ctrl.fREQ_CALC.derivative.x_start fixed = true ) "State of block" type: Real G2.central_Unit.freq_ctrl.fREQ_CALC.firstOrder.y:VARIABLE(flow=false start = G2.central_Unit.freq_ctrl.fREQ_CALC.firstOrder.y_start fixed = true ) "Connector of Real output signal" 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: 49 ($PRE.G2.central_Unit.aCT_UNIT.rSFlipFlop.pre.u,$PRE.G2.central_Unit.aCT_UNIT.f_limit_check.pre1.u,$PRE.G2.central_Unit.aCT_UNIT.f_limit_check.timer.entryTime,$PRE.G2.central_Unit.aCT_UNIT.v_limit_check.pre1.u,$PRE.G2.central_Unit.aCT_UNIT.v_limit_check.timer.entryTime,$PRE.G2.central_Unit.aCT_UNIT.fi_limit_check.pre1.u,$PRE.G2.central_Unit.aCT_UNIT.fi_limit_check.timer.entryTime,$PRE.G2.central_Unit.angle_ctrl.rSFlipFlop.pre.u,breaker2.TRIGGER,G2.central_Unit.aCT_UNIT.rSFlipFlop.pre.u,G2.central_Unit.aCT_UNIT.rSFlipFlop.QI,G2.central_Unit.aCT_UNIT.START_FI,G2.central_Unit.aCT_UNIT.START_FREQ,G2.central_Unit.aCT_UNIT.and1.y,G2.central_Unit.aCT_UNIT.and1.u[3],G2.central_Unit.aCT_UNIT.f_limit_check.pre1.y,G2.central_Unit.aCT_UNIT.f_limit_check.pre1.u,G2.central_Unit.aCT_UNIT.f_limit_check.timer.entryTime,G2.central_Unit.aCT_UNIT.f_limit_check.lessEqualThreshold.y,G2.central_Unit.aCT_UNIT.f_limit_check.greaterEqualThreshold.y,G2.central_Unit.aCT_UNIT.v_limit_check.pre1.y,G2.central_Unit.aCT_UNIT.v_limit_check.pre1.u,G2.central_Unit.aCT_UNIT.v_limit_check.timer.entryTime,G2.central_Unit.aCT_UNIT.v_limit_check.lessEqualThreshold.y,G2.central_Unit.aCT_UNIT.v_limit_check.greaterEqualThreshold.y,G2.central_Unit.aCT_UNIT.fi_limit_check.pre1.y,G2.central_Unit.aCT_UNIT.fi_limit_check.pre1.u,G2.central_Unit.aCT_UNIT.fi_limit_check.timer.entryTime,G2.central_Unit.aCT_UNIT.fi_limit_check.lessEqualThreshold.y,G2.central_Unit.aCT_UNIT.fi_limit_check.greaterEqualThreshold.y,G2.central_Unit.volt_ctrl.booleanStep.y,G2.central_Unit.angle_ctrl.rSFlipFlop.pre.u,G2.central_Unit.angle_ctrl.rSFlipFlop.QI,G2.central_Unit.angle_ctrl.rSFlipFlop.Q,G2.central_Unit.angle_ctrl.xor.y,G2.central_Unit.angle_ctrl.booleanStep2.y,G2.central_Unit.freq_ctrl.xor.y,$whenCondition1,$whenCondition2,$whenCondition3,$whenCondition5,$whenCondition4,$whenCondition7,$whenCondition6,G2.central_Unit.volt_ctrl.integrator.local_reset,G2.central_Unit.angle_ctrl.integrator.local_reset,G2.central_Unit.freq_ctrl.integrator.local_reset,G1.hYGOV.Position_Limiter.local_reset,G1.hYGOV.q.local_reset) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (410): * Single equations (assignments): 406 * Array equations: 0 * Algorithm blocks: 2 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 0 * Torn equation systems: 2 * Mixed (continuous/discrete) equation systems: 0 Notification: Torn system details for strict tearing set: * Linear torn systems (#iteration vars, #inner vars, density): 0 systems * Non-linear torn systems (#iteration vars, #inner vars): 2 systems {(1,6), (43,67)} Notification: Performance of prepare postOptimizeDAE: time 0.001431/0.944, allocations: 419.9 kB / 0.825 GB, free: 74.22 MB / 0.5606 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.001126/0.9451, allocations: 359.3 kB / 0.8253 GB, free: 74.05 MB / 0.5606 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.02229/0.9674, allocations: 7.125 MB / 0.8323 GB, free: 66.87 MB / 0.5606 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 8.748e-05/0.9676, allocations: 15.95 kB / 0.8323 GB, free: 66.85 MB / 0.5606 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 7.394e-06/0.9676, allocations: 0 / 0.8323 GB, free: 66.85 MB / 0.5606 GB Notification: Performance of postOpt removeConstants (simulation): time 0.001313/0.9689, allocations: 489.8 kB / 0.8328 GB, free: 66.41 MB / 0.5606 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.001387/0.9703, allocations: 64 kB / 0.8328 GB, free: 66.35 MB / 0.5606 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.00373/0.9741, allocations: 255.7 kB / 0.8331 GB, free: 66.1 MB / 0.5606 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.002359/0.9764, allocations: 0.7316 MB / 0.8338 GB, free: 65.36 MB / 0.5606 GB Notification: Performance of postOpt createDAEmodeBDAE (simulation): time 0.01683/0.9933, allocations: 5.384 MB / 0.839 GB, free: 59.98 MB / 0.5606 GB Notification: Performance of postOpt symbolicJacobianDAE (simulation): time 0.01131/1.005, allocations: 5.759 MB / 0.8447 GB, free: 54.13 MB / 0.5606 GB Notification: Performance of postOpt setEvaluationStage (simulation): time 0.003267/1.008, allocations: 1.657 MB / 0.8463 GB, free: 52.46 MB / 0.5606 GB Notification: Performance of sorting global known variables: time 0.004132/1.012, allocations: 2.121 MB / 0.8484 GB, free: 50.35 MB / 0.5606 GB Notification: Performance of Backend: time 2.014e-06/1.012, allocations: 4 kB / 0.8484 GB, free: 50.34 MB / 0.5606 GB Notification: Performance of simCode: created initialization part: time 0.02436/1.037, allocations: 8.034 MB / 0.8562 GB, free: 42.27 MB / 0.5606 GB Notification: Performance of SimCode: time 0.01182/1.048, allocations: 7.57 MB / 0.8636 GB, free: 34.71 MB / 0.5606 GB Notification: Performance of Templates: time 0.1218/1.17, allocations: 79.81 MB / 0.9415 GB, free: 3.047 MB / 0.6075 GB make -j1 -f OpenIPSL_dev_OpenIPSL.Examples.OpenCPS.Network_Expanded.makefile (rm -f OpenIPSL_dev_OpenIPSL.Examples.OpenCPS.Network_Expanded.pipe ; mkfifo OpenIPSL_dev_OpenIPSL.Examples.OpenCPS.Network_Expanded.pipe ; head -c 1048576 < OpenIPSL_dev_OpenIPSL.Examples.OpenCPS.Network_Expanded.pipe >> ../files/OpenIPSL_dev_OpenIPSL.Examples.OpenCPS.Network_Expanded.sim & ./OpenIPSL_dev_OpenIPSL.Examples.OpenCPS.Network_Expanded -abortSlowSimulation -alarm=480 -lv LOG_STATS > OpenIPSL_dev_OpenIPSL.Examples.OpenCPS.Network_Expanded.pipe 2>&1)