Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries/ --ompython_omhome=/usr Buildings_maint.7.0.x_Buildings.Electrical.AC.OnePhase.Lines.Examples.ACSimpleGrid.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 7.0.3-maint.7.0.x/package.mo", uses=false) Using package Buildings with version 7.0.3 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 7.0.3-maint.7.0.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.OnePhase.Lines.Examples.ACSimpleGrid,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="Buildings_maint.7.0.x_Buildings.Electrical.AC.OnePhase.Lines.Examples.ACSimpleGrid") translateModel(Buildings.Electrical.AC.OnePhase.Lines.Examples.ACSimpleGrid,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="Buildings_maint.7.0.x_Buildings.Electrical.AC.OnePhase.Lines.Examples.ACSimpleGrid") Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.001861/0.001861, allocations: 111.3 kB / 15.23 MB, free: 0.6406 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.002599/0.002599, allocations: 195.9 kB / 16.14 MB, free: 6.703 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 3.2.3+maint.om/package.mo): time 1.851/1.851, allocations: 205.1 MB / 222 MB, free: 4.758 MB / 174.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 7.0.3-maint.7.0.x/package.mo): time 1.819/1.819, allocations: 251.7 MB / 0.5088 GB, free: 3.34 MB / 414.1 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 0.001368/0.001368, allocations: 63.89 kB / 0.6216 GB, free: 1.992 MB / 0.5137 GB Notification: Performance of FrontEnd - Absyn->SCode: time 0.8129/0.8143, allocations: 104.7 MB / 0.7238 GB, free: 13.15 MB / 0.545 GB Notification: Performance of NFInst.instantiate(Buildings.Electrical.AC.OnePhase.Lines.Examples.ACSimpleGrid): time 0.007888/0.8223, allocations: 4.394 MB / 0.7281 GB, free: 8.73 MB / 0.545 GB Notification: Performance of NFInst.instExpressions: time 0.005607/0.828, allocations: 3.265 MB / 0.7313 GB, free: 5.453 MB / 0.545 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.0006216/0.8287, allocations: 11.94 kB / 0.7313 GB, free: 5.441 MB / 0.545 GB Notification: Performance of NFTyping.typeComponents: time 0.001777/0.8305, allocations: 473.8 kB / 0.7318 GB, free: 4.98 MB / 0.545 GB Notification: Performance of NFTyping.typeBindings: time 0.001428/0.8319, allocations: 358.4 kB / 0.7321 GB, free: 4.629 MB / 0.545 GB Notification: Performance of NFTyping.typeClassSections: time 0.0008073/0.8328, allocations: 231.5 kB / 0.7323 GB, free: 4.402 MB / 0.545 GB Notification: Performance of NFFlatten.flatten: time 0.001124/0.8339, allocations: 0.7984 MB / 0.7331 GB, free: 3.602 MB / 0.545 GB Notification: Performance of NFFlatten.resolveConnections: time 0.0008531/0.8348, allocations: 0.4952 MB / 0.7336 GB, free: 3.105 MB / 0.545 GB Notification: Performance of NFEvalConstants.evaluate: time 0.0005351/0.8353, allocations: 239.2 kB / 0.7338 GB, free: 2.871 MB / 0.545 GB Notification: Performance of NFSimplifyModel.simplify: time 0.0004763/0.8358, allocations: 275 kB / 0.7341 GB, free: 2.602 MB / 0.545 GB Notification: Performance of NFPackage.collectConstants: time 6.211e-05/0.8359, allocations: 24 kB / 0.7341 GB, free: 2.578 MB / 0.545 GB Notification: Performance of NFFlatten.collectFunctions: time 0.0007688/0.8366, allocations: 319.5 kB / 0.7344 GB, free: 2.266 MB / 0.545 GB Notification: Performance of NFScalarize.scalarize: time 0.0001809/0.8368, allocations: 151.5 kB / 0.7345 GB, free: 2.117 MB / 0.545 GB Notification: Performance of NFVerifyModel.verify: time 0.0002545/0.8371, allocations: 214.9 kB / 0.7348 GB, free: 1.906 MB / 0.545 GB Notification: Performance of NFConvertDAE.convert: time 0.0009247/0.838, allocations: 0.7828 MB / 0.7355 GB, free: 1.121 MB / 0.545 GB Notification: Performance of FrontEnd - DAE generated: time 7.393e-06/0.8381, allocations: 0 / 0.7355 GB, free: 1.121 MB / 0.545 GB Notification: Performance of FrontEnd: time 1.262e-06/0.8381, allocations: 0 / 0.7355 GB, free: 1.121 MB / 0.545 GB Notification: Performance of Transformations before backend: time 9.377e-06/0.8381, allocations: 0 / 0.7355 GB, free: 1.121 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: 81 * Number of variables: 81 Notification: Performance of Generate backend data structure: time 0.001698/0.8398, allocations: 0.7675 MB / 0.7363 GB, free: 312 kB / 0.545 GB Notification: Performance of prepare preOptimizeDAE: time 5.273e-05/0.8398, allocations: 8.031 kB / 0.7363 GB, free: 304 kB / 0.545 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.002692/0.8425, allocations: 0.6595 MB / 0.7369 GB, free: 15.63 MB / 0.5606 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.0008693/0.8434, allocations: 431.8 kB / 0.7373 GB, free: 15.18 MB / 0.5606 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 5.039e-05/0.8435, allocations: 25.03 kB / 0.7374 GB, free: 15.15 MB / 0.5606 GB Notification: Performance of preOpt expandDerOperator (simulation): time 9.652e-05/0.8436, allocations: 44.03 kB / 0.7374 GB, free: 15.11 MB / 0.5606 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.001647/0.8452, allocations: 0.767 MB / 0.7381 GB, free: 14.31 MB / 0.5606 GB Notification: Performance of preOpt findStateOrder (simulation): time 2.388e-05/0.8453, allocations: 7.844 kB / 0.7382 GB, free: 14.3 MB / 0.5606 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 5.716e-05/0.8454, allocations: 15.98 kB / 0.7382 GB, free: 14.29 MB / 0.5606 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 0.0001284/0.8455, allocations: 44.61 kB / 0.7382 GB, free: 14.25 MB / 0.5606 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.001929/0.8474, allocations: 0.8531 MB / 0.739 GB, free: 13.39 MB / 0.5606 GB Notification: Performance of preOpt removeSimpleEquations (simulation): time 0.004339/0.8518, allocations: 2.8 MB / 0.7418 GB, free: 10.36 MB / 0.5606 GB Notification: Performance of preOpt comSubExp (simulation): time 0.001541/0.8534, allocations: 0.498 MB / 0.7423 GB, free: 9.855 MB / 0.5606 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.0006122/0.854, allocations: 256.6 kB / 0.7425 GB, free: 9.602 MB / 0.5606 GB Notification: Performance of preOpt evalFunc (simulation): time 0.0001245/0.8541, allocations: 81.11 kB / 0.7426 GB, free: 9.504 MB / 0.5606 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 3.524e-05/0.8542, allocations: 38.56 kB / 0.7426 GB, free: 9.457 MB / 0.5606 GB Notification: Performance of pre-optimization done (n=16): time 2.464e-06/0.8542, allocations: 0 / 0.7426 GB, free: 9.457 MB / 0.5606 GB Notification: Performance of matching and sorting (n=24): time 0.01134/0.8655, allocations: 2.969 MB / 0.7455 GB, free: 6.457 MB / 0.5606 GB Notification: Performance of inlineWhenForInitialization (initialization): time 5.032e-05/0.8656, allocations: 55.41 kB / 0.7456 GB, free: 6.391 MB / 0.5606 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.000564/0.8662, allocations: 393.6 kB / 0.746 GB, free: 6 MB / 0.5606 GB Notification: Performance of collectPreVariables (initialization): time 5.703e-05/0.8663, allocations: 33.7 kB / 0.746 GB, free: 5.961 MB / 0.5606 GB Notification: Performance of collectInitialEqns (initialization): time 0.0001847/0.8665, allocations: 239.7 kB / 0.7462 GB, free: 5.723 MB / 0.5606 GB Notification: Performance of collectInitialBindings (initialization): time 8.267e-05/0.8666, allocations: 70.92 kB / 0.7463 GB, free: 5.652 MB / 0.5606 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.000157/0.8667, allocations: 81.44 kB / 0.7464 GB, free: 5.566 MB / 0.5606 GB Notification: Performance of setup shared object (initialization): time 0.0001345/0.8669, allocations: 346.8 kB / 0.7467 GB, free: 5.219 MB / 0.5606 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0008131/0.8677, allocations: 352.5 kB / 0.747 GB, free: 4.871 MB / 0.5606 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.0009249/0.8686, allocations: 412.5 kB / 0.7474 GB, free: 4.438 MB / 0.5606 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.001668/0.8703, allocations: 0.7438 MB / 0.7481 GB, free: 3.668 MB / 0.5606 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 2.304e-06/0.8703, allocations: 0 / 0.7481 GB, free: 3.668 MB / 0.5606 GB Notification: Performance of matching and sorting (n=35) (initialization): time 0.004847/0.8752, allocations: 1.464 MB / 0.7496 GB, free: 2.191 MB / 0.5606 GB Notification: Performance of prepare postOptimizeDAE: time 3.932e-05/0.8752, allocations: 8.031 kB / 0.7496 GB, free: 2.184 MB / 0.5606 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.26e-05/0.8753, allocations: 4 kB / 0.7496 GB, free: 2.18 MB / 0.5606 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.003661/0.8789, allocations: 0.7779 MB / 0.7503 GB, free: 1.395 MB / 0.5606 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0006892/0.8796, allocations: 119.8 kB / 0.7505 GB, free: 1.277 MB / 0.5606 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.006894/0.8866, allocations: 4.501 MB / 0.7549 GB, free: 12.5 MB / 0.5762 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.000797/0.8874, allocations: 107.8 kB / 0.755 GB, free: 12.4 MB / 0.5762 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 3.966e-05/0.8874, allocations: 11.98 kB / 0.755 GB, free: 12.39 MB / 0.5762 GB Notification: Performance of preBalanceInitialSystem (initialization_lambda0): time 0.00111/0.8886, allocations: 0.5193 MB / 0.7555 GB, free: 11.86 MB / 0.5762 GB Notification: Performance of partitionIndependentBlocks (initialization_lambda0): time 0.0008289/0.8894, allocations: 409.3 kB / 0.7559 GB, free: 11.43 MB / 0.5762 GB Notification: Performance of analyzeInitialSystem (initialization_lambda0): time 0.001548/0.891, allocations: 0.722 MB / 0.7566 GB, free: 10.68 MB / 0.5762 GB Notification: Performance of solveInitialSystemEqSystem (initialization_lambda0): time 1.984e-06/0.891, allocations: 0 / 0.7566 GB, free: 10.68 MB / 0.5762 GB Notification: Performance of matching and sorting (n=35) (initialization_lambda0): time 0.003954/0.8949, allocations: 1.239 MB / 0.7578 GB, free: 9.434 MB / 0.5762 GB Notification: Performance of prepare postOptimizeDAE: time 1.553e-05/0.895, allocations: 7.984 kB / 0.7578 GB, free: 9.426 MB / 0.5762 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 6.743e-06/0.895, allocations: 4 kB / 0.7578 GB, free: 9.422 MB / 0.5762 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.002237/0.8972, allocations: 0.4925 MB / 0.7583 GB, free: 8.926 MB / 0.5762 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0005978/0.8978, allocations: 131.8 kB / 0.7584 GB, free: 8.797 MB / 0.5762 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.003292/0.9011, allocations: 2.416 MB / 0.7608 GB, free: 6.25 MB / 0.5762 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0007488/0.9019, allocations: 104 kB / 0.7609 GB, free: 6.148 MB / 0.5762 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 3.894e-05/0.902, allocations: 19.98 kB / 0.7609 GB, free: 6.129 MB / 0.5762 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 9 * 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 (29): * Single equations (assignments): 27 * Array equations: 0 * Algorithm blocks: 0 * 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): 1 system {(2,2,100.0%)} * Non-linear torn systems (#iteration vars, #inner vars): 1 system {(2,2)} Notification: Performance of prepare postOptimizeDAE: time 0.0002065/0.9022, allocations: 204.1 kB / 0.7611 GB, free: 5.922 MB / 0.5762 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 8.839e-05/0.9023, allocations: 35.69 kB / 0.7611 GB, free: 5.887 MB / 0.5762 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.004429/0.9067, allocations: 1.337 MB / 0.7624 GB, free: 4.535 MB / 0.5762 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 6.643e-06/0.9067, allocations: 4 kB / 0.7624 GB, free: 4.531 MB / 0.5762 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 5.501e-06/0.9067, allocations: 3.938 kB / 0.7624 GB, free: 4.527 MB / 0.5762 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 6.913e-06/0.9067, allocations: 3.984 kB / 0.7624 GB, free: 4.523 MB / 0.5762 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.005351/0.9121, allocations: 1.987 MB / 0.7644 GB, free: 2.461 MB / 0.5762 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 4.358e-06/0.9121, allocations: 3.938 kB / 0.7644 GB, free: 2.457 MB / 0.5762 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0003694/0.9125, allocations: 83.98 kB / 0.7644 GB, free: 2.375 MB / 0.5762 GB Notification: Performance of postOpt tearingSystem (simulation): time 0.003022/0.9155, allocations: 0.7076 MB / 0.7651 GB, free: 1.66 MB / 0.5762 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 4.169e-05/0.9156, allocations: 8 kB / 0.7651 GB, free: 1.652 MB / 0.5762 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.005822/0.9214, allocations: 4.325 MB / 0.7694 GB, free: 13.06 MB / 0.5919 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 7.504e-06/0.9215, allocations: 7.875 kB / 0.7694 GB, free: 13.05 MB / 0.5919 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.00418/0.9256, allocations: 1.353 MB / 0.7707 GB, free: 11.67 MB / 0.5919 GB Notification: Performance of postOpt removeConstants (simulation): time 0.0003019/0.926, allocations: 168.6 kB / 0.7709 GB, free: 11.48 MB / 0.5919 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 6.418e-05/0.926, allocations: 4 kB / 0.7709 GB, free: 11.48 MB / 0.5919 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0005441/0.9266, allocations: 83.86 kB / 0.7709 GB, free: 11.4 MB / 0.5919 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0001456/0.9267, allocations: 27.91 kB / 0.771 GB, free: 11.37 MB / 0.5919 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 3.107e-05/0.9268, allocations: 11.98 kB / 0.771 GB, free: 11.36 MB / 0.5919 GB Notification: Performance of sorting global known variables: time 0.0004111/0.9272, allocations: 303.1 kB / 0.7713 GB, free: 11.06 MB / 0.5919 GB Notification: Performance of sort global known variables: time 1.51e-07/0.9272, allocations: 0 / 0.7713 GB, free: 11.06 MB / 0.5919 GB Notification: Performance of remove unused functions: time 0.0009089/0.9281, allocations: 196 kB / 0.7715 GB, free: 10.87 MB / 0.5919 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 4 * 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 (19): * Single equations (assignments): 17 * Array equations: 0 * Algorithm blocks: 0 * 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): 1 system {(2,2,100.0%)} * Non-linear torn systems (#iteration vars, #inner vars): 1 system {(2,2)} Notification: Performance of Backend phase and start with SimCode phase: time 0.000219/0.9283, allocations: 103.2 kB / 0.7716 GB, free: 10.76 MB / 0.5919 GB Notification: Performance of simCode: created initialization part: time 0.003483/0.9318, allocations: 1.527 MB / 0.773 GB, free: 9.195 MB / 0.5919 GB Notification: Performance of simCode: created event and clocks part: time 3.256e-06/0.9319, allocations: 4.062 kB / 0.7731 GB, free: 9.191 MB / 0.5919 GB Notification: Performance of simCode: created simulation system equations: time 0.001143/0.933, allocations: 0.6265 MB / 0.7737 GB, free: 8.539 MB / 0.5919 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.0007168/0.9337, allocations: 128.2 kB / 0.7738 GB, free: 8.418 MB / 0.5919 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.002174/0.9359, allocations: 1.205 MB / 0.775 GB, free: 7.18 MB / 0.5919 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0005977/0.9365, allocations: 0.9171 MB / 0.7759 GB, free: 6.234 MB / 0.5919 GB Notification: Performance of simCode: alias equations: time 0.0005246/0.9371, allocations: 147.2 kB / 0.776 GB, free: 6.094 MB / 0.5919 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0001265/0.9372, allocations: 35.41 kB / 0.776 GB, free: 6.059 MB / 0.5919 GB Notification: Performance of SimCode: time 8.92e-07/0.9372, allocations: 0 / 0.776 GB, free: 6.059 MB / 0.5919 GB Notification: Performance of Templates: time 0.01897/0.9562, allocations: 11.64 MB / 0.7874 GB, free: 10.5 MB / 0.6075 GB make -j1 -f Buildings_maint.7.0.x_Buildings.Electrical.AC.OnePhase.Lines.Examples.ACSimpleGrid.makefile (rm -f Buildings_maint.7.0.x_Buildings.Electrical.AC.OnePhase.Lines.Examples.ACSimpleGrid.pipe ; mkfifo Buildings_maint.7.0.x_Buildings.Electrical.AC.OnePhase.Lines.Examples.ACSimpleGrid.pipe ; head -c 1048576 < Buildings_maint.7.0.x_Buildings.Electrical.AC.OnePhase.Lines.Examples.ACSimpleGrid.pipe >> ../files/Buildings_maint.7.0.x_Buildings.Electrical.AC.OnePhase.Lines.Examples.ACSimpleGrid.sim & ./Buildings_maint.7.0.x_Buildings.Electrical.AC.OnePhase.Lines.Examples.ACSimpleGrid -abortSlowSimulation -alarm=480 -lv LOG_STATS > Buildings_maint.7.0.x_Buildings.Electrical.AC.OnePhase.Lines.Examples.ACSimpleGrid.pipe 2>&1)