Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr Buildings_10_Buildings.Fluid.Examples.Performance.PressureDrop.SeriesParallelDpOptimised.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/Buildings 10.1.0-maint.10.0.x/package.mo", uses=false) Using package Buildings with version 10.1.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 10.1.0-maint.10.0.x/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: translateModel(Buildings.Fluid.Examples.Performance.PressureDrop.SeriesParallelDpOptimised,tolerance=1e-06,outputFormat="mat",numberOfIntervals=5000,variableFilter="time|sin.ports.1..m_flow",fileNamePrefix="Buildings_10_Buildings.Fluid.Examples.Performance.PressureDrop.SeriesParallelDpOptimised") translateModel(Buildings.Fluid.Examples.Performance.PressureDrop.SeriesParallelDpOptimised,tolerance=1e-06,outputFormat="mat",numberOfIntervals=5000,variableFilter="time|sin.ports.1..m_flow",fileNamePrefix="Buildings_10_Buildings.Fluid.Examples.Performance.PressureDrop.SeriesParallelDpOptimised") Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.001058/0.001058, allocations: 92.7 kB / 16.02 MB, free: 80 kB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.00139/0.001389, allocations: 180.3 kB / 16.92 MB, free: 6.652 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo): time 1.377/1.377, allocations: 223.3 MB / 241 MB, free: 5.293 MB / 190.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 10.1.0-maint.10.0.x/package.mo): time 2.528/2.528, allocations: 437.8 MB / 0.7128 GB, free: 6.898 MB / 0.5606 GB Notification: Performance of FrontEnd - loaded program: time 0.000375/0.0003752, allocations: 12 kB / 0.8735 GB, free: 3.273 MB / 0.7169 GB Notification: Performance of FrontEnd - Absyn->SCode: time 0.6912/0.6916, allocations: 153.8 MB / 1.024 GB, free: 15.85 MB / 0.7794 GB Notification: Performance of NFInst.instantiate(Buildings.Fluid.Examples.Performance.PressureDrop.SeriesParallelDpOptimised): time 0.1714/0.8631, allocations: 163.4 MB / 1.183 GB, free: 11.87 MB / 0.9356 GB Notification: Performance of NFInst.instExpressions: time 0.005848/0.869, allocations: 4.034 MB / 1.187 GB, free: 7.832 MB / 0.9356 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.0005413/0.8695, allocations: 15.88 kB / 1.187 GB, free: 7.816 MB / 0.9356 GB Notification: Performance of NFTyping.typeComponents: time 0.0007252/0.8703, allocations: 198.9 kB / 1.187 GB, free: 7.621 MB / 0.9356 GB Notification: Performance of NFTyping.typeBindings: time 0.001839/0.8721, allocations: 0.6454 MB / 1.188 GB, free: 6.977 MB / 0.9356 GB Notification: Performance of NFTyping.typeClassSections: time 0.001343/0.8735, allocations: 434.9 kB / 1.188 GB, free: 6.555 MB / 0.9356 GB Notification: Performance of NFFlatten.flatten: time 0.003804/0.8773, allocations: 3.803 MB / 1.192 GB, free: 2.734 MB / 0.9356 GB Notification: Performance of NFFlatten.resolveConnections: time 0.002896/0.8802, allocations: 2.367 MB / 1.194 GB, free: 360 kB / 0.9356 GB Notification: Performance of NFEvalConstants.evaluate: time 0.002612/0.8829, allocations: 1.113 MB / 1.196 GB, free: 15.23 MB / 0.9512 GB Notification: Performance of NFSimplifyModel.simplify: time 0.001531/0.8844, allocations: 0.8596 MB / 1.196 GB, free: 14.37 MB / 0.9512 GB Notification: Performance of NFPackage.collectConstants: time 0.0001341/0.8846, allocations: 44 kB / 1.196 GB, free: 14.33 MB / 0.9512 GB Notification: Performance of NFFlatten.collectFunctions: time 0.001805/0.8864, allocations: 0.8964 MB / 1.197 GB, free: 13.43 MB / 0.9512 GB Notification: Performance of NFScalarize.scalarize: time 0.0004261/0.8868, allocations: 334.7 kB / 1.198 GB, free: 13.1 MB / 0.9512 GB Notification: Performance of NFVerifyModel.verify: time 0.0007937/0.8876, allocations: 0.604 MB / 1.198 GB, free: 12.49 MB / 0.9512 GB Notification: Performance of NFConvertDAE.convert: time 0.001383/0.889, allocations: 1.161 MB / 1.199 GB, free: 11.32 MB / 0.9512 GB Notification: Performance of FrontEnd - DAE generated: time 5.38e-06/0.889, allocations: 0 / 1.199 GB, free: 11.32 MB / 0.9512 GB Notification: Performance of FrontEnd: time 2.785e-06/0.889, allocations: 0 / 1.199 GB, free: 11.32 MB / 0.9512 GB Notification: Performance of Transformations before backend: time 2.441e-05/0.8891, allocations: 0 / 1.199 GB, free: 11.32 MB / 0.9512 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 135 * Number of variables: 135 Notification: Performance of Generate backend data structure: time 0.002571/0.8917, allocations: 1.481 MB / 1.201 GB, free: 9.785 MB / 0.9512 GB Notification: Performance of prepare preOptimizeDAE: time 4.437e-05/0.8917, allocations: 16.03 kB / 1.201 GB, free: 9.77 MB / 0.9512 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.000859/0.8926, allocations: 194.4 kB / 1.201 GB, free: 9.578 MB / 0.9512 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.001325/0.8939, allocations: 0.8851 MB / 1.202 GB, free: 8.637 MB / 0.9512 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 5.062e-05/0.894, allocations: 49.31 kB / 1.202 GB, free: 8.586 MB / 0.9512 GB Notification: Performance of preOpt expandDerOperator (simulation): time 0.0001124/0.8941, allocations: 64 kB / 1.202 GB, free: 8.523 MB / 0.9512 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.001472/0.8956, allocations: 1.003 MB / 1.203 GB, free: 7.445 MB / 0.9512 GB Notification: Performance of preOpt findStateOrder (simulation): time 1.703e-05/0.8956, allocations: 4 kB / 1.203 GB, free: 7.441 MB / 0.9512 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 6.784e-05/0.8957, allocations: 24 kB / 1.203 GB, free: 7.418 MB / 0.9512 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 1.873e-05/0.8957, allocations: 16 kB / 1.203 GB, free: 7.402 MB / 0.9512 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.001269/0.897, allocations: 0.8077 MB / 1.204 GB, free: 6.594 MB / 0.9512 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 0.004793/0.9018, allocations: 4.809 MB / 1.208 GB, free: 1.445 MB / 0.9512 GB Notification: Performance of preOpt comSubExp (simulation): time 0.002395/0.9042, allocations: 4.01 MB / 1.212 GB, free: 12.61 MB / 0.9669 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.0005506/0.9048, allocations: 357.2 kB / 1.213 GB, free: 12.26 MB / 0.9669 GB Notification: Performance of preOpt evalFunc (simulation): time 0.0002994/0.9051, allocations: 190.5 kB / 1.213 GB, free: 12.04 MB / 0.9669 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 0.0005722/0.9057, allocations: 334.2 kB / 1.213 GB, free: 11.69 MB / 0.9669 GB Notification: Performance of preOpt simplifyInStream (simulation): time 0.0004426/0.9061, allocations: 31.67 kB / 1.213 GB, free: 11.66 MB / 0.9669 GB Notification: Performance of pre-optimization done (n=35): time 5.791e-06/0.9061, allocations: 7.922 kB / 1.213 GB, free: 11.65 MB / 0.9669 GB Notification: Performance of matching and sorting (n=35): time 0.005307/0.9114, allocations: 1.769 MB / 1.215 GB, free: 9.852 MB / 0.9669 GB Notification: Performance of inlineWhenForInitialization (initialization): time 6.065e-05/0.9115, allocations: 85.09 kB / 1.215 GB, free: 9.75 MB / 0.9669 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.001538/0.9131, allocations: 1.185 MB / 1.216 GB, free: 8.551 MB / 0.9669 GB Notification: Performance of collectPreVariables (initialization): time 6.031e-05/0.9131, allocations: 37.7 kB / 1.216 GB, free: 8.508 MB / 0.9669 GB Notification: Performance of collectInitialEqns (initialization): time 0.0004065/0.9136, allocations: 0.5082 MB / 1.217 GB, free: 7.996 MB / 0.9669 GB Notification: Performance of collectInitialBindings (initialization): time 0.0001045/0.9137, allocations: 126.3 kB / 1.217 GB, free: 7.871 MB / 0.9669 GB Notification: Performance of simplifyInitialFunctions (initialization): time 6.733e-05/0.9137, allocations: 45.7 kB / 1.217 GB, free: 7.82 MB / 0.9669 GB Notification: Performance of setup shared object (initialization): time 0.0001026/0.9139, allocations: 333.9 kB / 1.217 GB, free: 7.488 MB / 0.9669 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0003935/0.9143, allocations: 232.9 kB / 1.217 GB, free: 7.262 MB / 0.9669 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.0006119/0.9149, allocations: 0.562 MB / 1.218 GB, free: 6.562 MB / 0.9669 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.0009296/0.9158, allocations: 0.6902 MB / 1.219 GB, free: 5.793 MB / 0.9669 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 4.839e-06/0.9158, allocations: 0 / 1.219 GB, free: 5.793 MB / 0.9669 GB Notification: Performance of matching and sorting (n=58) (initialization): time 0.002416/0.9183, allocations: 1.154 MB / 1.22 GB, free: 4.621 MB / 0.9669 GB Notification: Performance of prepare postOptimizeDAE: time 0.0001628/0.9184, allocations: 271 kB / 1.22 GB, free: 4.273 MB / 0.9669 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.044e-05/0.9184, allocations: 4 kB / 1.22 GB, free: 4.27 MB / 0.9669 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.001301/0.9198, allocations: 410.4 kB / 1.22 GB, free: 3.867 MB / 0.9669 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0003248/0.9201, allocations: 75.89 kB / 1.221 GB, free: 3.793 MB / 0.9669 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.001097/0.9212, allocations: 1.051 MB / 1.222 GB, free: 2.715 MB / 0.9669 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.001001/0.9222, allocations: 87.95 kB / 1.222 GB, free: 2.629 MB / 0.9669 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 5.42e-05/0.9223, allocations: 24 kB / 1.222 GB, free: 2.605 MB / 0.9669 GB Notification: Performance of prepare postOptimizeDAE: time 1.238e-05/0.9223, allocations: 8 kB / 1.222 GB, free: 2.598 MB / 0.9669 GB Notification: Performance of postOpt replaceHomotopyWithSimplified (initialization): time 0.001447/0.9238, allocations: 0.8103 MB / 1.222 GB, free: 1.777 MB / 0.9669 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.272e-05/0.9238, allocations: 8 kB / 1.222 GB, free: 1.77 MB / 0.9669 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.0005951/0.9244, allocations: 258 kB / 1.223 GB, free: 1.516 MB / 0.9669 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0003223/0.9247, allocations: 71.83 kB / 1.223 GB, free: 1.445 MB / 0.9669 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.003597/0.9283, allocations: 3.11 MB / 1.226 GB, free: 14.2 MB / 0.9825 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.001009/0.9293, allocations: 95.75 kB / 1.226 GB, free: 14.11 MB / 0.9825 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 4.607e-05/0.9294, allocations: 28 kB / 1.226 GB, free: 14.08 MB / 0.9825 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 24 * Number of states: 0 () * Number of discrete variables: 5 (pulse_m_flow.count,$PRE.pulse_m_flow.count,pulse_m_flow.T_start,$PRE.pulse_m_flow.T_start,$whenCondition1) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (35): * Single equations (assignments): 33 * Array equations: 0 * 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 {(1,22)} Notification: Performance of prepare postOptimizeDAE: time 0.0006073/0.93, allocations: 486.2 kB / 1.226 GB, free: 13.59 MB / 0.9825 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0001573/0.9302, allocations: 106.7 kB / 1.227 GB, free: 13.49 MB / 0.9825 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.001493/0.9317, allocations: 0.8243 MB / 1.227 GB, free: 12.65 MB / 0.9825 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 7.134e-06/0.9317, allocations: 4 kB / 1.227 GB, free: 12.64 MB / 0.9825 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 2.665e-06/0.9317, allocations: 0 / 1.227 GB, free: 12.64 MB / 0.9825 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 5.01e-06/0.9317, allocations: 0 / 1.227 GB, free: 12.64 MB / 0.9825 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 postOpt removeSimpleEquations (simulation): time 0.002891/0.9346, allocations: 2.167 MB / 1.229 GB, free: 10.34 MB / 0.9825 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 5.39e-06/0.9346, allocations: 0 / 1.229 GB, free: 10.34 MB / 0.9825 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0002629/0.9349, allocations: 51.89 kB / 1.229 GB, free: 10.29 MB / 0.9825 GB Notification: Performance of postOpt tearingSystem (simulation): time 0.0004753/0.9354, allocations: 208.8 kB / 1.23 GB, free: 10.08 MB / 0.9825 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 2.859e-05/0.9354, allocations: 19.92 kB / 1.23 GB, free: 10.06 MB / 0.9825 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.0007544/0.9362, allocations: 0.8905 MB / 1.231 GB, free: 9.145 MB / 0.9825 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 2.505e-06/0.9362, allocations: 0 / 1.231 GB, free: 9.145 MB / 0.9825 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.001385/0.9376, allocations: 0.8807 MB / 1.231 GB, free: 8.223 MB / 0.9825 GB Notification: Performance of postOpt removeConstants (simulation): time 0.0004301/0.938, allocations: 239.6 kB / 1.232 GB, free: 7.969 MB / 0.9825 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0001109/0.9382, allocations: 12 kB / 1.232 GB, free: 7.957 MB / 0.9825 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0006764/0.9388, allocations: 67.83 kB / 1.232 GB, free: 7.891 MB / 0.9825 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 8.399e-05/0.9389, allocations: 35.89 kB / 1.232 GB, free: 7.855 MB / 0.9825 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 2.838e-05/0.939, allocations: 12 kB / 1.232 GB, free: 7.844 MB / 0.9825 GB Notification: Performance of sorting global known variables: time 0.001017/0.94, allocations: 0.8367 MB / 1.233 GB, free: 7 MB / 0.9825 GB Notification: Performance of sort global known variables: time 1.2e-07/0.94, allocations: 0 / 1.233 GB, free: 7 MB / 0.9825 GB Notification: Performance of remove unused functions: time 0.001428/0.9414, allocations: 0.5031 MB / 1.233 GB, free: 6.496 MB / 0.9825 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 8 * Number of states: 0 () * Number of discrete variables: 3 ($whenCondition1,pulse_m_flow.T_start,pulse_m_flow.count) * Number of discrete states: 1 (pulse_m_flow.count) * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for simulation (22): * Single equations (assignments): 19 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * 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 {(1,13)} Notification: Performance of Backend phase and start with SimCode phase: time 0.0004647/0.9419, allocations: 190.5 kB / 1.233 GB, free: 6.312 MB / 0.9825 GB Notification: Performance of simCode: created initialization part: time 0.002012/0.9439, allocations: 1.169 MB / 1.234 GB, free: 5.109 MB / 0.9825 GB Notification: Performance of simCode: created event and clocks part: time 4.178e-06/0.9439, allocations: 0 / 1.234 GB, free: 5.109 MB / 0.9825 GB Notification: Performance of simCode: created simulation system equations: time 0.0004613/0.9444, allocations: 248.2 kB / 1.235 GB, free: 4.867 MB / 0.9825 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.003793/0.9482, allocations: 0.6575 MB / 1.235 GB, free: 4.215 MB / 0.9825 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.003304/0.9515, allocations: 2.254 MB / 1.237 GB, free: 1.902 MB / 0.9825 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0007377/0.9523, allocations: 1.213 MB / 1.239 GB, free: 0.6602 MB / 0.9825 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0001965/0.9525, allocations: 67.44 kB / 1.239 GB, free: 0.5938 MB / 0.9825 GB Notification: Performance of SimCode: time 6.61e-07/0.9525, allocations: 0 / 1.239 GB, free: 0.5938 MB / 0.9825 GB Notification: Performance of Templates: time 0.5299/1.482, allocations: 22.35 MB / 1.261 GB, free: 229.5 MB / 0.9981 GB make -j1 -f Buildings_10_Buildings.Fluid.Examples.Performance.PressureDrop.SeriesParallelDpOptimised.makefile (rm -f Buildings_10_Buildings.Fluid.Examples.Performance.PressureDrop.SeriesParallelDpOptimised.pipe ; mkfifo Buildings_10_Buildings.Fluid.Examples.Performance.PressureDrop.SeriesParallelDpOptimised.pipe ; head -c 1048576 < Buildings_10_Buildings.Fluid.Examples.Performance.PressureDrop.SeriesParallelDpOptimised.pipe >> ../files/Buildings_10_Buildings.Fluid.Examples.Performance.PressureDrop.SeriesParallelDpOptimised.sim & ./Buildings_10_Buildings.Fluid.Examples.Performance.PressureDrop.SeriesParallelDpOptimised -abortSlowSimulation -alarm=480 -emit_protected -lv LOG_STATS > Buildings_10_Buildings.Fluid.Examples.Performance.PressureDrop.SeriesParallelDpOptimised.pipe 2>&1) diffSimulationResults("Buildings_10_Buildings.Fluid.Examples.Performance.PressureDrop.SeriesParallelDpOptimised_res.mat","/mnt/ReferenceFiles/Buildings/csv/maint_10.0.x/Buildings_Fluid_Examples_Performance_PressureDrop_SeriesParallelDpOptimised.csv","/var/lib/jenkins1/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/files/Buildings_10_Buildings.Fluid.Examples.Performance.PressureDrop.SeriesParallelDpOptimised.diff",relTol=0.003,relTolDiffMinMax=0.003,rangeDelta=0.001) Reference file matches