Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries/ --ompython_omhome=/usr Buildings_8_Buildings.Fluid.Examples.Performance.Example2.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.Fluid.Examples.Performance.Example2,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="Buildings_8_Buildings.Fluid.Examples.Performance.Example2") translateModel(Buildings.Fluid.Examples.Performance.Example2,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="Buildings_8_Buildings.Fluid.Examples.Performance.Example2") Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.001882/0.001882, allocations: 103.3 kB / 16.29 MB, free: 6.43 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.001929/0.001929, allocations: 185.1 kB / 17.22 MB, free: 5.934 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 3.2.3+maint.om/package.mo): time 1.398/1.398, allocations: 205.1 MB / 223.1 MB, free: 12.3 MB / 190.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 8.1.4-maint.8.1.x/package.mo): time 1.779/1.779, allocations: 292.3 MB / 0.5495 GB, free: 17.57 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 0.001408/0.001408, allocations: 67.91 kB / 0.6722 GB, free: 6.512 MB / 0.545 GB Notification: Performance of FrontEnd - Absyn->SCode: time 0.2244/0.2258, allocations: 114.6 MB / 0.7841 GB, free: 3.848 MB / 0.6544 GB Notification: Performance of NFInst.instantiate(Buildings.Fluid.Examples.Performance.Example2): time 0.3933/0.6191, allocations: 29.72 MB / 0.8131 GB, free: 31.58 MB / 0.6544 GB Notification: Performance of NFInst.instExpressions: time 0.01789/0.6371, allocations: 12.48 MB / 0.8253 GB, free: 23.08 MB / 0.6544 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.002054/0.6392, allocations: 53.75 kB / 0.8253 GB, free: 23.06 MB / 0.6544 GB Notification: Performance of NFTyping.typeComponents: time 0.002201/0.6414, allocations: 0.6893 MB / 0.826 GB, free: 22.68 MB / 0.6544 GB Notification: Performance of NFTyping.typeBindings: time 0.004107/0.6455, allocations: 1.446 MB / 0.8274 GB, free: 21.86 MB / 0.6544 GB Notification: Performance of NFTyping.typeClassSections: time 0.003635/0.6492, allocations: 1.374 MB / 0.8288 GB, free: 21.16 MB / 0.6544 GB Notification: Performance of NFFlatten.flatten: time 0.004996/0.6542, allocations: 3.808 MB / 0.8325 GB, free: 19.4 MB / 0.6544 GB Notification: Performance of NFFlatten.resolveConnections: time 0.002233/0.6565, allocations: 1.364 MB / 0.8338 GB, free: 18.83 MB / 0.6544 GB Notification: Performance of NFEvalConstants.evaluate: time 0.003403/0.6599, allocations: 1.473 MB / 0.8352 GB, free: 18.21 MB / 0.6544 GB Notification: Performance of NFSimplifyModel.simplify: time 0.001986/0.6619, allocations: 1.042 MB / 0.8363 GB, free: 17.72 MB / 0.6544 GB Notification: Performance of NFPackage.collectConstants: time 0.0003134/0.6622, allocations: 118.1 kB / 0.8364 GB, free: 17.72 MB / 0.6544 GB Notification: Performance of NFFlatten.collectFunctions: time 0.002776/0.665, allocations: 1.13 MB / 0.8375 GB, free: 17.4 MB / 0.6544 GB Notification: Performance of NFScalarize.scalarize: time 0.0004292/0.6654, allocations: 398 kB / 0.8379 GB, free: 17.19 MB / 0.6544 GB Notification: Performance of NFVerifyModel.verify: time 0.0009716/0.6664, allocations: 0.7806 MB / 0.8386 GB, free: 16.71 MB / 0.6544 GB Notification: Performance of NFConvertDAE.convert: time 0.003589/0.67, allocations: 2.44 MB / 0.841 GB, free: 15.81 MB / 0.6544 GB Notification: Performance of FrontEnd - DAE generated: time 5.811e-06/0.67, allocations: 0.7031 kB / 0.841 GB, free: 15.81 MB / 0.6544 GB Notification: Performance of FrontEnd: time 2.114e-06/0.67, allocations: 0 / 0.841 GB, free: 15.81 MB / 0.6544 GB Notification: Performance of Transformations before backend: time 3.725e-05/0.6701, allocations: 1.969 kB / 0.841 GB, free: 15.81 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: 188 * Number of variables: 188 Notification: Performance of Generate backend data structure: time 0.003336/0.6734, allocations: 1.943 MB / 0.8429 GB, free: 14.52 MB / 0.6544 GB Notification: Performance of prepare preOptimizeDAE: time 4.334e-05/0.6735, allocations: 9.875 kB / 0.8429 GB, free: 14.52 MB / 0.6544 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.001067/0.6745, allocations: 253.4 kB / 0.8432 GB, free: 14.43 MB / 0.6544 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.002224/0.6768, allocations: 1.271 MB / 0.8444 GB, free: 13.71 MB / 0.6544 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 5.787e-05/0.6769, allocations: 62.19 kB / 0.8445 GB, free: 13.68 MB / 0.6544 GB Notification: Performance of preOpt expandDerOperator (simulation): time 0.0001275/0.677, allocations: 93.86 kB / 0.8445 GB, free: 13.65 MB / 0.6544 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.001583/0.6786, allocations: 0.9814 MB / 0.8455 GB, free: 13.17 MB / 0.6544 GB Notification: Performance of preOpt findStateOrder (simulation): time 2.503e-05/0.6786, allocations: 1.375 kB / 0.8455 GB, free: 13.17 MB / 0.6544 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 7.68e-05/0.6787, allocations: 32.25 kB / 0.8455 GB, free: 13.15 MB / 0.6544 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 1.596e-05/0.6787, allocations: 19.25 kB / 0.8456 GB, free: 13.15 MB / 0.6544 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.001382/0.6801, allocations: 0.7077 MB / 0.8462 GB, free: 12.91 MB / 0.6544 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 0.005054/0.6852, allocations: 4.84 MB / 0.851 GB, free: 9.297 MB / 0.6544 GB Notification: Performance of preOpt comSubExp (simulation): time 0.001135/0.6863, allocations: 0.5459 MB / 0.8515 GB, free: 9.102 MB / 0.6544 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.0006098/0.6869, allocations: 318.3 kB / 0.8518 GB, free: 8.992 MB / 0.6544 GB Notification: Performance of preOpt evalFunc (simulation): time 0.002015/0.689, allocations: 1.588 MB / 0.8534 GB, free: 7.758 MB / 0.6544 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 0.0006213/0.6896, allocations: 338 kB / 0.8537 GB, free: 7.621 MB / 0.6544 GB Notification: Performance of preOpt simplifyInStream (simulation): time 0.0002527/0.6899, allocations: 46.31 kB / 0.8537 GB, free: 7.59 MB / 0.6544 GB Notification: Performance of pre-optimization done (n=43): time 2.214e-06/0.6899, allocations: 3.469 kB / 0.8537 GB, free: 7.59 MB / 0.6544 GB Notification: Performance of matching and sorting (n=43): time 0.002981/0.6929, allocations: 1.153 MB / 0.8549 GB, free: 7.156 MB / 0.6544 GB Notification: Performance of inlineWhenForInitialization (initialization): time 3.326e-05/0.6929, allocations: 57.27 kB / 0.8549 GB, free: 7.094 MB / 0.6544 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.001613/0.6945, allocations: 1.276 MB / 0.8562 GB, free: 6.535 MB / 0.6544 GB Notification: Performance of collectPreVariables (initialization): time 5.661e-05/0.6946, allocations: 39.8 kB / 0.8562 GB, free: 6.496 MB / 0.6544 GB Notification: Performance of collectInitialEqns (initialization): time 0.0004316/0.695, allocations: 0.647 MB / 0.8568 GB, free: 5.926 MB / 0.6544 GB Notification: Performance of collectInitialBindings (initialization): time 0.0001055/0.6952, allocations: 146.6 kB / 0.857 GB, free: 5.801 MB / 0.6544 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.0002189/0.6954, allocations: 163.4 kB / 0.8571 GB, free: 5.699 MB / 0.6544 GB Notification: Performance of setup shared object (initialization): time 5.79e-05/0.6954, allocations: 336.7 kB / 0.8574 GB, free: 5.371 MB / 0.6544 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0005363/0.696, allocations: 273.4 kB / 0.8577 GB, free: 5.238 MB / 0.6544 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.0006788/0.6967, allocations: 0.5836 MB / 0.8583 GB, free: 4.676 MB / 0.6544 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.001125/0.6978, allocations: 0.8175 MB / 0.8591 GB, free: 4.047 MB / 0.6544 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 6.132e-06/0.6978, allocations: 2.375 kB / 0.8591 GB, free: 4.047 MB / 0.6544 GB Notification: Performance of matching and sorting (n=84) (initialization): time 0.002026/0.6999, allocations: 1.089 MB / 0.8601 GB, free: 3.48 MB / 0.6544 GB Notification: Performance of prepare postOptimizeDAE: time 3.272e-05/0.6999, allocations: 36.02 kB / 0.8602 GB, free: 3.449 MB / 0.6544 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.404e-05/0.6999, allocations: 7.719 kB / 0.8602 GB, free: 3.449 MB / 0.6544 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.0006106/0.7005, allocations: 189.6 kB / 0.8604 GB, free: 3.375 MB / 0.6544 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0005411/0.7011, allocations: 143.3 kB / 0.8605 GB, free: 3.336 MB / 0.6544 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.0005714/0.7017, allocations: 0.7722 MB / 0.8613 GB, free: 2.68 MB / 0.6544 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0007859/0.7025, allocations: 39.14 kB / 0.8613 GB, free: 2.664 MB / 0.6544 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 7.816e-05/0.7026, allocations: 37.61 kB / 0.8613 GB, free: 2.656 MB / 0.6544 GB Notification: Performance of preBalanceInitialSystem (initialization_lambda0): time 0.0008578/0.7034, allocations: 0.557 MB / 0.8619 GB, free: 2.32 MB / 0.6544 GB Notification: Performance of partitionIndependentBlocks (initialization_lambda0): time 0.0005411/0.704, allocations: 0.5502 MB / 0.8624 GB, free: 1.781 MB / 0.6544 GB Notification: Performance of analyzeInitialSystem (initialization_lambda0): time 0.0009318/0.7049, allocations: 0.7454 MB / 0.8631 GB, free: 1.191 MB / 0.6544 GB Notification: Performance of solveInitialSystemEqSystem (initialization_lambda0): time 4.889e-06/0.7049, allocations: 2.656 kB / 0.8631 GB, free: 1.191 MB / 0.6544 GB Notification: Performance of matching and sorting (n=84) (initialization_lambda0): time 0.001708/0.7067, allocations: 1.062 MB / 0.8642 GB, free: 0.5625 MB / 0.6544 GB Notification: Performance of prepare postOptimizeDAE: time 2.736e-05/0.7067, allocations: 36.48 kB / 0.8642 GB, free: 0.5312 MB / 0.6544 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 9.568e-06/0.7067, allocations: 8.062 kB / 0.8642 GB, free: 0.5312 MB / 0.6544 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.0001943/0.7069, allocations: 104.3 kB / 0.8643 GB, free: 500 kB / 0.6544 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0004584/0.7074, allocations: 131.7 kB / 0.8644 GB, free: 468 kB / 0.6544 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.002102/0.7095, allocations: 2.366 MB / 0.8668 GB, free: 14.36 MB / 0.67 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0007524/0.7103, allocations: 40.36 kB / 0.8668 GB, free: 14.35 MB / 0.67 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 6.494e-05/0.7103, allocations: 36.05 kB / 0.8668 GB, free: 14.34 MB / 0.67 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 34 * Number of states: 0 () * Number of discrete variables: 7 (pulse.count,$PRE.pulse.count,pulse.T_start,$PRE.pulse.T_start,$whenCondition1,nRes.y,from_dp.y) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (71): * Single equations (assignments): 68 * Array equations: 1 * Algorithm blocks: 1 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 0 * Torn equation systems: 1 * 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): 1 system {(5,7)} Notification: Performance of prepare postOptimizeDAE: time 0.0002858/0.7106, allocations: 240.1 kB / 0.8671 GB, free: 14.11 MB / 0.67 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0001773/0.7108, allocations: 126.5 kB / 0.8672 GB, free: 14.05 MB / 0.67 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.001861/0.7127, allocations: 0.8697 MB / 0.868 GB, free: 13.58 MB / 0.67 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 1.346e-05/0.7127, allocations: 9.438 kB / 0.868 GB, free: 13.58 MB / 0.67 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 3.616e-06/0.7127, allocations: 3.938 kB / 0.868 GB, free: 13.57 MB / 0.67 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 0.001324/0.714, allocations: 0.8701 MB / 0.8689 GB, free: 12.95 MB / 0.67 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.003046/0.7171, allocations: 1.803 MB / 0.8706 GB, free: 11.73 MB / 0.67 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 6.973e-06/0.7171, allocations: 3.984 kB / 0.8706 GB, free: 11.73 MB / 0.67 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0003947/0.7175, allocations: 75.53 kB / 0.8707 GB, free: 11.71 MB / 0.67 GB Notification: Performance of postOpt tearingSystem (simulation): time 0.0002792/0.7178, allocations: 129.6 kB / 0.8708 GB, free: 11.65 MB / 0.67 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 3.834e-05/0.7179, allocations: 8.219 kB / 0.8709 GB, free: 11.64 MB / 0.67 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.0005797/0.7184, allocations: 0.7496 MB / 0.8716 GB, free: 11 MB / 0.67 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 3.477e-06/0.7185, allocations: 3.938 kB / 0.8716 GB, free: 11 MB / 0.67 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.002242/0.7207, allocations: 1.182 MB / 0.8727 GB, free: 10.3 MB / 0.67 GB Notification: Performance of postOpt removeConstants (simulation): time 0.0004141/0.7211, allocations: 250.4 kB / 0.873 GB, free: 10.09 MB / 0.67 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0001389/0.7213, allocations: 15.67 kB / 0.873 GB, free: 10.07 MB / 0.67 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0005039/0.7218, allocations: 30.84 kB / 0.873 GB, free: 10.06 MB / 0.67 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 9.929e-05/0.7219, allocations: 38.22 kB / 0.8731 GB, free: 10.04 MB / 0.67 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 5.316e-05/0.722, allocations: 25.14 kB / 0.8731 GB, free: 10.02 MB / 0.67 GB Notification: Performance of sorting global known variables: time 0.001187/0.7232, allocations: 0.8842 MB / 0.8739 GB, free: 9.535 MB / 0.67 GB Notification: Performance of sort global known variables: time 1.6e-07/0.7232, allocations: 0 / 0.8739 GB, free: 9.535 MB / 0.67 GB Notification: Performance of remove unused functions: time 0.002011/0.7252, allocations: 0.645 MB / 0.8746 GB, free: 9.402 MB / 0.67 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 3 * Number of states: 1 (pump_dp.vol.dynBal.U) * Number of discrete variables: 3 ($whenCondition1,pulse.T_start,pulse.count) * Number of discrete states: 1 (pulse.count) * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for simulation (38): * Single equations (assignments): 32 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 3 * When equations: 2 * If-equations: 0 * Equation systems (not torn): 0 * Torn equation systems: 1 * 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): 1 system {(5,7)} Notification: Performance of Backend phase and start with SimCode phase: time 0.0008496/0.726, allocations: 380.8 kB / 0.8749 GB, free: 9.191 MB / 0.67 GB Notification: Performance of simCode: created initialization part: time 0.00251/0.7286, allocations: 1.322 MB / 0.8762 GB, free: 8.449 MB / 0.67 GB Notification: Performance of simCode: created event and clocks part: time 4.098e-06/0.7286, allocations: 2 kB / 0.8762 GB, free: 8.449 MB / 0.67 GB Notification: Performance of simCode: created simulation system equations: time 0.0007311/0.7293, allocations: 330.3 kB / 0.8766 GB, free: 8.301 MB / 0.67 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.002312/0.7316, allocations: 0.5969 MB / 0.8771 GB, free: 8.023 MB / 0.67 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.003633/0.7353, allocations: 2.209 MB / 0.8793 GB, free: 6.727 MB / 0.67 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0007779/0.7361, allocations: 1.266 MB / 0.8805 GB, free: 5.754 MB / 0.67 GB Notification: Performance of simCode: alias equations: time 0.001012/0.7371, allocations: 313.6 kB / 0.8808 GB, free: 5.605 MB / 0.67 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0002136/0.7373, allocations: 103 kB / 0.8809 GB, free: 5.582 MB / 0.67 GB Notification: Performance of SimCode: time 5.51e-07/0.7373, allocations: 0 / 0.8809 GB, free: 5.582 MB / 0.67 GB Notification: Performance of Templates: time 0.04034/0.7777, allocations: 25.65 MB / 0.906 GB, free: 12.87 MB / 0.7012 GB make -j1 -f Buildings_8_Buildings.Fluid.Examples.Performance.Example2.makefile (rm -f Buildings_8_Buildings.Fluid.Examples.Performance.Example2.pipe ; mkfifo Buildings_8_Buildings.Fluid.Examples.Performance.Example2.pipe ; head -c 1048576 < Buildings_8_Buildings.Fluid.Examples.Performance.Example2.pipe >> ../files/Buildings_8_Buildings.Fluid.Examples.Performance.Example2.sim & ./Buildings_8_Buildings.Fluid.Examples.Performance.Example2 -abortSlowSimulation -alarm=480 -s cvode -lv LOG_STATS > Buildings_8_Buildings.Fluid.Examples.Performance.Example2.pipe 2>&1)