Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr Buildings_latest_Buildings.Fluid.MixingVolumes.Validation.MSLCombustionAir.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 11.0.0-master/package.mo", uses=false) Using package Buildings with version 11.0.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 11.0.0-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(Buildings.Fluid.MixingVolumes.Validation.MSLCombustionAir,fileNamePrefix="Buildings_latest_Buildings_Fluid_MixingVolumes_Validation_MSLCombustionAir",fmuType="me",version="2.0",platforms={"static"}) "" <> buildModelFMU(Buildings.Fluid.MixingVolumes.Validation.MSLCombustionAir,fileNamePrefix="Buildings_latest_Buildings_Fluid_MixingVolumes_Validation_MSLCombustionAir",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 0.001051/0.001051, allocations: 90.83 kB / 15.36 MB, free: 0.7383 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.008567/0.008567, allocations: 172.5 kB / 16.26 MB, free: 6.676 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo): time 1.349/1.349, allocations: 223.3 MB / 240.3 MB, free: 5.348 MB / 190.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 11.0.0-master/package.mo): time 2.749/2.749, allocations: 462.6 MB / 0.7364 GB, free: 15.6 MB / 0.5919 GB Notification: Performance of FrontEnd - loaded program: time 0.0003078/0.0003078, allocations: 16.47 kB / 0.9029 GB, free: 36.33 MB / 0.7169 GB Notification: Performance of FrontEnd - Absyn->SCode: time 0.3149/0.3152, allocations: 159.6 MB / 1.059 GB, free: 4.895 MB / 0.8106 GB Notification: Performance of NFInst.instantiate(Buildings.Fluid.MixingVolumes.Validation.MSLCombustionAir): time 0.1946/0.5099, allocations: 180.3 MB / 1.235 GB, free: 15.96 MB / 0.9981 GB Notification: Performance of NFInst.instExpressions: time 0.0105/0.5204, allocations: 6.765 MB / 1.241 GB, free: 9.184 MB / 0.9981 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.001139/0.5216, allocations: 23.81 kB / 1.241 GB, free: 9.16 MB / 0.9981 GB Notification: Performance of NFTyping.typeComponents: time 0.001206/0.5228, allocations: 294.4 kB / 1.242 GB, free: 8.871 MB / 0.9981 GB Notification: Performance of NFTyping.typeBindings: time 0.005747/0.5286, allocations: 1.867 MB / 1.244 GB, free: 7 MB / 0.9981 GB Notification: Performance of NFTyping.typeClassSections: time 0.002063/0.5307, allocations: 0.6079 MB / 1.244 GB, free: 6.398 MB / 0.9981 GB Notification: Performance of NFFlatten.flatten: time 0.003428/0.5341, allocations: 2.261 MB / 1.246 GB, free: 4.125 MB / 0.9981 GB Notification: Performance of NFFlatten.resolveConnections: time 0.001172/0.5353, allocations: 482.5 kB / 1.247 GB, free: 3.656 MB / 0.9981 GB Notification: Performance of NFEvalConstants.evaluate: time 0.002181/0.5375, allocations: 0.7938 MB / 1.248 GB, free: 2.859 MB / 0.9981 GB Notification: Performance of NFSimplifyModel.simplify: time 0.001863/0.5394, allocations: 498.3 kB / 1.248 GB, free: 2.375 MB / 0.9981 GB Notification: Performance of NFPackage.collectConstants: time 0.0001706/0.5396, allocations: 24 kB / 1.248 GB, free: 2.352 MB / 0.9981 GB Notification: Performance of NFFlatten.collectFunctions: time 0.5616/1.101, allocations: 2.571 MB / 1.251 GB, free: 5.887 MB / 0.9981 GB Notification: Performance of NFScalarize.scalarize: time 0.0003834/1.102, allocations: 245.1 kB / 1.251 GB, free: 5.887 MB / 0.9981 GB Notification: Performance of NFVerifyModel.verify: time 0.0005169/1.102, allocations: 361 kB / 1.251 GB, free: 5.855 MB / 0.9981 GB Notification: Performance of NFConvertDAE.convert: time 0.003349/1.106, allocations: 2.068 MB / 1.253 GB, free: 5.82 MB / 0.9981 GB Notification: Performance of FrontEnd - DAE generated: time 4.248e-06/1.106, allocations: 0 / 1.253 GB, free: 5.82 MB / 0.9981 GB Notification: Performance of FrontEnd: time 1.693e-06/1.106, allocations: 2.781 kB / 1.253 GB, free: 5.82 MB / 0.9981 GB Notification: Performance of Transformations before backend: time 9.318e-06/1.106, allocations: 0 / 1.253 GB, free: 5.82 MB / 0.9981 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 119 * Number of variables: 119 Notification: Performance of Generate backend data structure: time 0.00155/1.107, allocations: 0.9743 MB / 1.254 GB, free: 5.27 MB / 0.9981 GB Notification: Performance of prepare preOptimizeDAE: time 5.032e-05/1.107, allocations: 16.66 kB / 1.254 GB, free: 5.266 MB / 0.9981 GB Notification: Performance of preOpt introduceOutputAliases (simulation): time 0.0001572/1.107, allocations: 89.14 kB / 1.254 GB, free: 5.227 MB / 0.9981 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.001827/1.109, allocations: 276.5 kB / 1.255 GB, free: 5.191 MB / 0.9981 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.0008825/1.11, allocations: 0.6227 MB / 1.255 GB, free: 4.922 MB / 0.9981 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 2.823e-05/1.11, allocations: 36.38 kB / 1.255 GB, free: 4.922 MB / 0.9981 GB Notification: Performance of preOpt expandDerOperator (simulation): time 7.232e-05/1.11, allocations: 50.67 kB / 1.255 GB, free: 4.922 MB / 0.9981 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.000878/1.111, allocations: 0.6002 MB / 1.256 GB, free: 4.863 MB / 0.9981 GB Notification: Performance of preOpt findStateOrder (simulation): time 1.835e-05/1.111, allocations: 1.562 kB / 1.256 GB, free: 4.863 MB / 0.9981 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 5.479e-05/1.111, allocations: 21.44 kB / 1.256 GB, free: 4.863 MB / 0.9981 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 3.293e-05/1.111, allocations: 18.67 kB / 1.256 GB, free: 4.863 MB / 0.9981 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.0006745/1.112, allocations: 475.8 kB / 1.256 GB, free: 4.863 MB / 0.9981 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 0.002786/1.115, allocations: 2.148 MB / 1.258 GB, free: 19.82 MB / 1.014 GB Notification: Performance of preOpt comSubExp (simulation): time 0.0005751/1.115, allocations: 389.8 kB / 1.259 GB, free: 19.8 MB / 1.014 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.0002874/1.116, allocations: 216 kB / 1.259 GB, free: 19.79 MB / 1.014 GB Notification: Performance of preOpt evalFunc (simulation): time 7.146e-05/1.116, allocations: 17.22 kB / 1.259 GB, free: 19.79 MB / 1.014 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 3.417e-05/1.116, allocations: 40.67 kB / 1.259 GB, free: 19.75 MB / 1.014 GB Notification: Performance of pre-optimization done (n=34): time 1.883e-06/1.116, allocations: 0 / 1.259 GB, free: 19.75 MB / 1.014 GB Notification: Performance of matching and sorting (n=34): time 0.001216/1.117, allocations: 0.6445 MB / 1.26 GB, free: 19.58 MB / 1.014 GB Notification: Performance of inlineWhenForInitialization (initialization): time 3.787e-05/1.117, allocations: 61.7 kB / 1.26 GB, free: 19.52 MB / 1.014 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.0005516/1.118, allocations: 494.8 kB / 1.26 GB, free: 19.39 MB / 1.014 GB Notification: Performance of collectPreVariables (initialization): time 4.246e-05/1.118, allocations: 31.48 kB / 1.26 GB, free: 19.36 MB / 1.014 GB Notification: Performance of collectInitialEqns (initialization): time 0.0002077/1.118, allocations: 293 kB / 1.26 GB, free: 19.23 MB / 1.014 GB Notification: Performance of collectInitialBindings (initialization): time 0.0001031/1.118, allocations: 121 kB / 1.261 GB, free: 19.15 MB / 1.014 GB Notification: Performance of simplifyInitialFunctions (initialization): time 5.668e-05/1.118, allocations: 39.56 kB / 1.261 GB, free: 19.13 MB / 1.014 GB Notification: Performance of setup shared object (initialization): time 0.0001654/1.118, allocations: 363.6 kB / 1.261 GB, free: 18.82 MB / 1.014 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0002195/1.118, allocations: 152.9 kB / 1.261 GB, free: 18.82 MB / 1.014 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.000274/1.119, allocations: 226 kB / 1.261 GB, free: 18.76 MB / 1.014 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.0004649/1.119, allocations: 368.1 kB / 1.262 GB, free: 18.73 MB / 1.014 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 2.855e-06/1.119, allocations: 0 / 1.262 GB, free: 18.73 MB / 1.014 GB Notification: Performance of matching and sorting (n=42) (initialization): time 0.0006206/1.12, allocations: 478.8 kB / 1.262 GB, free: 18.66 MB / 1.014 GB Notification: Performance of prepare postOptimizeDAE: time 6.472e-05/1.12, allocations: 112.1 kB / 1.262 GB, free: 18.54 MB / 1.014 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 5.431e-06/1.12, allocations: 1.859 kB / 1.262 GB, free: 18.54 MB / 1.014 GB Notification: Performance of postOpt tearingSystem (initialization): time 1.372e-05/1.12, allocations: 2.562 kB / 1.262 GB, free: 18.54 MB / 1.014 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0004765/1.12, allocations: 100.1 kB / 1.262 GB, free: 18.54 MB / 1.014 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.0003896/1.121, allocations: 0.5946 MB / 1.263 GB, free: 17.95 MB / 1.014 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.000504/1.121, allocations: 73.2 kB / 1.263 GB, free: 17.93 MB / 1.014 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 4.65e-05/1.121, allocations: 17.23 kB / 1.263 GB, free: 17.93 MB / 1.014 GB Notification: Performance of prepare postOptimizeDAE: time 7.775e-06/1.121, allocations: 4.562 kB / 1.263 GB, free: 17.93 MB / 1.014 GB Notification: Performance of postOpt replaceHomotopyWithSimplified (initialization): time 0.0005596/1.122, allocations: 389.9 kB / 1.263 GB, free: 17.93 MB / 1.014 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 2.394e-06/1.122, allocations: 4.75 kB / 1.263 GB, free: 17.92 MB / 1.014 GB Notification: Performance of postOpt tearingSystem (initialization): time 3.597e-06/1.122, allocations: 2.938 kB / 1.263 GB, free: 17.92 MB / 1.014 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0002858/1.122, allocations: 76.64 kB / 1.263 GB, free: 17.92 MB / 1.014 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 7.264e-06/1.122, allocations: 7.75 kB / 1.263 GB, free: 17.92 MB / 1.014 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0003981/1.123, allocations: 71.3 kB / 1.264 GB, free: 17.89 MB / 1.014 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 3.035e-05/1.123, allocations: 18.12 kB / 1.264 GB, free: 17.89 MB / 1.014 GB Notification: Model statistics after passing the back-end for initialization: * 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 initialization (42): * Single equations (assignments): 41 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 1 * Torn equation systems: 0 * Mixed (continuous/discrete) equation systems: 0 Notification: Equation system details (not torn): * Constant Jacobian (size): 0 systems * Linear Jacobian (size,density): 0 systems * Non-linear Jacobian (size): 1 system {1} * Without analytic Jacobian (size): 0 systems Notification: Performance of prepare postOptimizeDAE: time 0.0003107/1.123, allocations: 299.3 kB / 1.264 GB, free: 17.71 MB / 1.014 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 7.708e-05/1.123, allocations: 49.2 kB / 1.264 GB, free: 17.68 MB / 1.014 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.0007459/1.124, allocations: 484.5 kB / 1.264 GB, free: 17.62 MB / 1.014 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 4.729e-06/1.124, allocations: 4.375 kB / 1.264 GB, free: 17.62 MB / 1.014 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 5.309e-06/1.124, allocations: 0 / 1.264 GB, free: 17.62 MB / 1.014 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 0.00065/1.125, allocations: 0.6927 MB / 1.265 GB, free: 17.17 MB / 1.014 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.001954/1.126, allocations: 1.427 MB / 1.266 GB, free: 16.61 MB / 1.014 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 4.879e-06/1.127, allocations: 2.359 kB / 1.266 GB, free: 16.61 MB / 1.014 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0003518/1.127, allocations: 84.05 kB / 1.267 GB, free: 16.6 MB / 1.014 GB Notification: Performance of postOpt tearingSystem (simulation): time 0.0001345/1.127, allocations: 32.98 kB / 1.267 GB, free: 16.59 MB / 1.014 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 2.932e-05/1.127, allocations: 16.92 kB / 1.267 GB, free: 16.59 MB / 1.014 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.0006461/1.128, allocations: 1.145 MB / 1.268 GB, free: 15.49 MB / 1.014 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 2.935e-06/1.128, allocations: 2.031 kB / 1.268 GB, free: 15.49 MB / 1.014 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.001086/1.129, allocations: 0.7433 MB / 1.268 GB, free: 15.26 MB / 1.014 GB Notification: Performance of postOpt removeConstants (simulation): time 0.0002421/1.129, allocations: 185.2 kB / 1.269 GB, free: 15.13 MB / 1.014 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 6.975e-05/1.129, allocations: 13.09 kB / 1.269 GB, free: 15.13 MB / 1.014 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0004254/1.13, allocations: 34.52 kB / 1.269 GB, free: 15.13 MB / 1.014 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 5.842e-05/1.13, allocations: 34.23 kB / 1.269 GB, free: 15.12 MB / 1.014 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 4.776e-05/1.13, allocations: 20.53 kB / 1.269 GB, free: 15.12 MB / 1.014 GB Notification: Performance of sorting global known variables: time 0.0005819/1.13, allocations: 353 kB / 1.269 GB, free: 15.04 MB / 1.014 GB Notification: Performance of sort global known variables: time 1.4e-07/1.13, allocations: 0 / 1.269 GB, free: 15.04 MB / 1.014 GB Notification: Performance of remove unused functions: time 0.002444/1.133, allocations: 493.3 kB / 1.269 GB, free: 14.96 MB / 1.014 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 7 * Number of states: 4 (vol.dynBal.medium.Xi[1],vol.dynBal.medium.Xi[2],vol.dynBal.U,vol.dynBal.m) * 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 (34): * Single equations (assignments): 32 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 1 * Torn equation systems: 1 * Mixed (continuous/discrete) equation systems: 0 Notification: Equation system details (not torn): * Constant Jacobian (size): 0 systems * Linear Jacobian (size,density): 0 systems * Non-linear Jacobian (size): 1 system {1} * Without analytic Jacobian (size): 0 systems 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 {(1,1)} Notification: Performance of Backend phase and start with SimCode phase: time 0.00336/1.136, allocations: 1.685 MB / 1.271 GB, free: 14.14 MB / 1.014 GB Notification: Performance of simCode: created initialization part: time 0.001441/1.138, allocations: 0.5959 MB / 1.272 GB, free: 14.13 MB / 1.014 GB Notification: Performance of simCode: created event and clocks part: time 5.159e-06/1.138, allocations: 2.234 kB / 1.272 GB, free: 14.13 MB / 1.014 GB Notification: Performance of simCode: created simulation system equations: time 0.0004038/1.138, allocations: 211.9 kB / 1.272 GB, free: 14.12 MB / 1.014 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.001886/1.14, allocations: 342.8 kB / 1.272 GB, free: 14.1 MB / 1.014 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.00782/1.148, allocations: 5.243 MB / 1.277 GB, free: 11.85 MB / 1.014 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0005782/1.148, allocations: 0.923 MB / 1.278 GB, free: 11.15 MB / 1.014 GB Notification: Performance of simCode: alias equations: time 0.0007657/1.149, allocations: 208.3 kB / 1.278 GB, free: 11.11 MB / 1.014 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0002767/1.149, allocations: 210.2 kB / 1.279 GB, free: 11.11 MB / 1.014 GB Notification: Performance of SimCode: time 8.02e-07/1.149, allocations: 4.156 kB / 1.279 GB, free: 11.11 MB / 1.014 GB Notification: Performance of buildModelFMU: Generate the FMI files: time 0.04217/1.192, allocations: 19.7 MB / 1.298 GB, free: 9.758 MB / 1.014 GB Notification: Performance of buildModelFMU: configured platform static using cached values: time 0.0002212/1.192, allocations: 290.7 kB / 1.298 GB, free: 9.379 MB / 1.014 GB Notification: Performance of buildModelFMU: Generate platform static: time 2.468/3.66, allocations: 0 / 1.298 GB, free: 9.379 MB / 1.014 GB (rm -f Buildings_latest_Buildings.Fluid.MixingVolumes.Validation.MSLCombustionAir.pipe ; mkfifo Buildings_latest_Buildings.Fluid.MixingVolumes.Validation.MSLCombustionAir.pipe ; head -c 1048576 < Buildings_latest_Buildings.Fluid.MixingVolumes.Validation.MSLCombustionAir.pipe >> ../files/Buildings_latest_Buildings.Fluid.MixingVolumes.Validation.MSLCombustionAir.sim & /home/hudson/saved_omc/OMSimulator/install/bin/OMSimulator -r=Buildings_latest_Buildings.Fluid.MixingVolumes.Validation.MSLCombustionAir_res.mat --tempDir=temp_Buildings_latest_Buildings_Fluid_MixingVolumes_Validation_MSLCombustionAir_fmu --startTime=0 --stopTime=1 --timeout=50 --tolerance=1e-06 Buildings_latest_Buildings_Fluid_MixingVolumes_Validation_MSLCombustionAir.fmu > Buildings_latest_Buildings.Fluid.MixingVolumes.Validation.MSLCombustionAir.pipe 2>&1) diffSimulationResults("Buildings_latest_Buildings.Fluid.MixingVolumes.Validation.MSLCombustionAir_res.mat","/mnt/ReferenceFiles/Buildings/csv/master/Buildings_Fluid_MixingVolumes_Validation_MSLCombustionAir.csv","/var/lib/jenkins1/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/files/Buildings_latest_Buildings.Fluid.MixingVolumes.Validation.MSLCombustionAir.diff",relTol=0.003,relTolDiffMinMax=0.003,rangeDelta=0.001) Reference file matches