Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr ModelicaTest_3.2.3_ModelicaTest.MultiBody.FourbarVariants.JointSSR.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/ModelicaTest 3.2.3+maint.om/package.mo", uses=false) Using package ModelicaTest with version 3.2.3 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaTest 3.2.3+maint.om/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: "" <> buildModelFMU(ModelicaTest.MultiBody.FourbarVariants.JointSSR,fileNamePrefix="ModelicaTest_3_2_3_ModelicaTest_MultiBody_FourbarVariants_JointSSR",fmuType="me",version="2.0",platforms={"static"}) "" <> buildModelFMU(ModelicaTest.MultiBody.FourbarVariants.JointSSR,fileNamePrefix="ModelicaTest_3_2_3_ModelicaTest_MultiBody_FourbarVariants_JointSSR",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 0.001087/0.001087, allocations: 104.7 kB / 16.27 MB, free: 5.965 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.00123/0.00123, allocations: 193.4 kB / 17.2 MB, free: 5.598 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 3.2.3+maint.om/package.mo): time 1.59/1.59, allocations: 205.1 MB / 223.1 MB, free: 12.29 MB / 190.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaTest 3.2.3+maint.om/package.mo): time 0.2192/0.2192, allocations: 43.52 MB / 313.9 MB, free: 0.5273 MB / 254.1 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 0.002144/0.002144, allocations: 64.52 kB / 382.8 MB, free: 56.69 MB / 318.1 MB Notification: Performance of FrontEnd - Absyn->SCode: time 0.1339/0.1361, allocations: 57.79 MB / 440.6 MB, free: 6.816 MB / 318.1 MB Notification: Performance of NFInst.instantiate(ModelicaTest.MultiBody.FourbarVariants.JointSSR): time 0.01627/0.1524, allocations: 16.37 MB / 457 MB, free: 6.367 MB / 334.1 MB Notification: Performance of NFInst.instExpressions: time 0.01513/0.1675, allocations: 5.303 MB / 462.3 MB, free: 1.051 MB / 334.1 MB Notification: Performance of NFInst.updateImplicitVariability: time 0.00534/0.173, allocations: 99.75 kB / 462.4 MB, free: 0.9531 MB / 334.1 MB Notification: Performance of NFTyping.typeComponents: time 0.009902/0.183, allocations: 4.178 MB / 466.6 MB, free: 12.76 MB / 350.1 MB Notification: Performance of NFTyping.typeBindings: time 0.009115/0.1922, allocations: 2.758 MB / 469.3 MB, free: 9.992 MB / 350.1 MB Notification: Performance of NFTyping.typeClassSections: time 0.003448/0.1956, allocations: 1.263 MB / 470.6 MB, free: 8.727 MB / 350.1 MB Notification: Performance of NFFlatten.flatten: time 0.01104/0.2067, allocations: 7.45 MB / 478 MB, free: 1.262 MB / 350.1 MB Notification: Performance of NFFlatten.resolveConnections: time 0.00872/0.2154, allocations: 5.86 MB / 483.9 MB, free: 11.32 MB / 366.1 MB Notification: Performance of NFEvalConstants.evaluate: time 0.005062/0.2205, allocations: 2.691 MB / 486.6 MB, free: 8.625 MB / 366.1 MB Notification: Performance of NFSimplifyModel.simplify: time 0.006125/0.2267, allocations: 3.793 MB / 490.4 MB, free: 4.82 MB / 366.1 MB Notification: Performance of NFPackage.collectConstants: time 0.00272/0.2294, allocations: 0.5938 MB / 491 MB, free: 4.227 MB / 366.1 MB Notification: Performance of NFFlatten.collectFunctions: time 0.006177/0.2356, allocations: 1.752 MB / 492.7 MB, free: 2.473 MB / 366.1 MB Notification: Performance of NFScalarize.scalarize: time 0.005464/0.2411, allocations: 3.324 MB / 496 MB, free: 15.14 MB / 382.1 MB Notification: Performance of NFVerifyModel.verify: time 0.009351/0.2505, allocations: 3.853 MB / 499.9 MB, free: 11.27 MB / 382.1 MB Notification: Performance of NFConvertDAE.convert: time 0.01704/0.2676, allocations: 12.07 MB / 0.5 GB, free: 15.16 MB / 398.1 MB Notification: Performance of FrontEnd - DAE generated: time 8.386e-06/0.2677, allocations: 0 / 0.5 GB, free: 15.16 MB / 398.1 MB Notification: Performance of FrontEnd: time 1.684e-06/0.2677, allocations: 4 kB / 0.5 GB, free: 15.15 MB / 398.1 MB Notification: Performance of Transformations before backend: time 0.0005556/0.2682, allocations: 0 / 0.5 GB, free: 15.15 MB / 398.1 MB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 2564 * Number of variables: 2564 Notification: Performance of Generate backend data structure: time 0.02615/0.2944, allocations: 8.034 MB / 0.5078 GB, free: 7.031 MB / 398.1 MB Notification: Performance of prepare preOptimizeDAE: time 5.581e-05/0.2945, allocations: 15.89 kB / 0.5078 GB, free: 7.016 MB / 398.1 MB Notification: Performance of preOpt introduceOutputAliases (simulation): time 0.004052/0.2985, allocations: 1.299 MB / 0.5091 GB, free: 5.703 MB / 398.1 MB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.03097/0.3295, allocations: 5.709 MB / 0.5147 GB, free: 15.97 MB / 414.1 MB Notification: Performance of preOpt evaluateParameters (simulation): time 0.0128/0.3424, allocations: 5.596 MB / 0.5201 GB, free: 10.32 MB / 414.1 MB Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.000497/0.3429, allocations: 394 kB / 0.5205 GB, free: 9.93 MB / 414.1 MB Notification: Performance of preOpt expandDerOperator (simulation): time 0.003293/0.3462, allocations: 0.562 MB / 0.5211 GB, free: 9.367 MB / 414.1 MB Notification: Performance of preOpt clockPartitioning (simulation): time 0.4644/0.8107, allocations: 18.81 MB / 0.5394 GB, free: 76.12 MB / 414.1 MB Notification: Performance of preOpt findStateOrder (simulation): time 0.0002303/0.8109, allocations: 75.14 kB / 0.5395 GB, free: 76.09 MB / 414.1 MB Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.0007884/0.8117, allocations: 247.4 kB / 0.5398 GB, free: 75.98 MB / 414.1 MB Notification: Performance of preOpt inlineArrayEqn (simulation): time 0.005401/0.8172, allocations: 3.43 MB / 0.5431 GB, free: 75.35 MB / 414.1 MB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.03775/0.8549, allocations: 16.5 MB / 0.5592 GB, free: 68.2 MB / 414.1 MB 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 0.08447/0.9394, allocations: 66.88 MB / 0.6245 GB, free: 124 kB / 414.1 MB Notification: Performance of preOpt comSubExp (simulation): time 0.016/0.9555, allocations: 6.264 MB / 0.6306 GB, free: 9.602 MB / 430.1 MB Notification: Performance of preOpt resolveLoops (simulation): time 0.004409/0.9599, allocations: 2.827 MB / 0.6334 GB, free: 6.762 MB / 430.1 MB Notification: Performance of preOpt evalFunc (simulation): time 0.02681/0.9867, allocations: 13.85 MB / 0.6469 GB, free: 8.215 MB / 446.1 MB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 5.06e-05/0.9868, allocations: 60.5 kB / 0.647 GB, free: 8.148 MB / 446.1 MB Notification: Performance of pre-optimization done (n=284): time 6.352e-06/0.9868, allocations: 0 / 0.647 GB, free: 8.148 MB / 446.1 MB Notification: Performance of matching and sorting (n=345): time 0.09463/1.081, allocations: 25.23 MB / 0.6716 GB, free: 14.88 MB / 478.1 MB Notification: Performance of inlineWhenForInitialization (initialization): time 0.0001067/1.082, allocations: 188.3 kB / 0.6718 GB, free: 14.66 MB / 478.1 MB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.01005/1.092, allocations: 5.948 MB / 0.6776 GB, free: 8.738 MB / 478.1 MB Notification: Performance of collectPreVariables (initialization): time 0.0005325/1.092, allocations: 77.7 kB / 0.6777 GB, free: 8.656 MB / 478.1 MB Notification: Performance of collectInitialEqns (initialization): time 0.003838/1.096, allocations: 4.994 MB / 0.6826 GB, free: 3.594 MB / 478.1 MB Notification: Performance of collectInitialBindings (initialization): time 0.001718/1.098, allocations: 1.276 MB / 0.6838 GB, free: 2.301 MB / 478.1 MB Notification: Performance of simplifyInitialFunctions (initialization): time 0.004216/1.102, allocations: 1.873 MB / 0.6856 GB, free: 424 kB / 478.1 MB Notification: Performance of setup shared object (initialization): time 9.104e-05/1.102, allocations: 301.1 kB / 0.6859 GB, free: 120 kB / 478.1 MB Notification: Performance of preBalanceInitialSystem (initialization): time 0.005905/1.108, allocations: 3.29 MB / 0.6891 GB, free: 12.82 MB / 494.1 MB Notification: Performance of partitionIndependentBlocks (initialization): time 0.009553/1.118, allocations: 8.764 MB / 0.6977 GB, free: 1.359 MB / 494.1 MB Notification: Performance of analyzeInitialSystem (initialization): time 0.0173/1.135, allocations: 13.05 MB / 0.7104 GB, free: 1.586 MB / 0.4982 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 0.00026/1.135, allocations: 52 kB / 0.7105 GB, free: 1.535 MB / 0.4982 GB Notification: Performance of matching and sorting (n=1238) (initialization): time 0.02765/1.163, allocations: 12.81 MB / 0.723 GB, free: 4.676 MB / 0.5138 GB Notification: Performance of prepare postOptimizeDAE: time 0.0002648/1.163, allocations: 88 kB / 0.7231 GB, free: 4.59 MB / 0.5138 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 0.0003514/1.164, allocations: 192 kB / 0.7233 GB, free: 4.402 MB / 0.5138 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.004487/1.168, allocations: 1.327 MB / 0.7246 GB, free: 3.074 MB / 0.5138 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.007547/1.176, allocations: 2.164 MB / 0.7267 GB, free: 0.9062 MB / 0.5138 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.2639/1.44, allocations: 7.845 MB / 0.7343 GB, free: 164.5 MB / 0.5138 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.006412/1.446, allocations: 0.4902 MB / 0.7348 GB, free: 164.5 MB / 0.5138 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.001159/1.447, allocations: 0.5544 MB / 0.7354 GB, free: 164.5 MB / 0.5138 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 874 * Number of states: 0 () * Number of discrete variables: 46 (jointSSR.revolute.positiveBranch,Body2.sphereColor[3],Body2.sphereColor[2],Body2.sphereColor[1],Body1.sphereColor[3],Body1.sphereColor[2],Body1.sphereColor[1],FixedFrame1.color_x[3],FixedFrame1.color_x[2],FixedFrame1.color_x[1],jointSSR.rod1Color[3],jointSSR.rod1Color[2],jointSSR.rod1Color[1],jointSSR.rod1.massColor[3],jointSSR.rod1.massColor[2],jointSSR.rod1.massColor[1],jointSSR.sphereColor[3],jointSSR.sphereColor[2],jointSSR.sphereColor[1],jointSSR.revoluteColor[3],jointSSR.revoluteColor[2],jointSSR.revoluteColor[1],b3.color[3],b3.color[2],b3.color[1],b2.color[3],b2.color[2],b2.color[1],b2.body.sphereColor[3],b2.body.sphereColor[2],b2.body.sphereColor[1],j2.boxColor[3],j2.boxColor[2],j2.boxColor[1],world.gravityArrowColor[3],world.gravityArrowColor[2],world.gravityArrowColor[1],world.axisColor_x[3],world.axisColor_x[2],world.axisColor_x[1],world.groundColor[3],world.groundColor[2],world.groundColor[1],world.gravitySphereColor[3],world.gravitySphereColor[2],world.gravitySphereColor[1]) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (1152): * Single equations (assignments): 1145 * Array equations: 6 * Algorithm blocks: 0 * 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): 1 system {(2,37,100.0%)} * Non-linear torn systems (#iteration vars, #inner vars): 0 systems Notification: Performance of prepare postOptimizeDAE: time 0.006062/1.453, allocations: 3.447 MB / 0.7387 GB, free: 163.2 MB / 0.5138 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.001079/1.454, allocations: 0.5308 MB / 0.7393 GB, free: 163.2 MB / 0.5138 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.01158/1.466, allocations: 5.419 MB / 0.7445 GB, free: 161.2 MB / 0.5138 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 5.132e-05/1.466, allocations: 36.81 kB / 0.7446 GB, free: 161.2 MB / 0.5138 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 2.445e-05/1.466, allocations: 7.062 kB / 0.7446 GB, free: 161.2 MB / 0.5138 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 3.415e-05/1.466, allocations: 15.48 kB / 0.7446 GB, free: 161.2 MB / 0.5138 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.02787/1.494, allocations: 14.02 MB / 0.7583 GB, free: 155.9 MB / 0.5138 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 2.868e-05/1.494, allocations: 7.812 kB / 0.7583 GB, free: 155.9 MB / 0.5138 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.002305/1.496, allocations: 0.5036 MB / 0.7588 GB, free: 155.9 MB / 0.5138 GB Notification: Performance of postOpt tearingSystem (simulation): time 0.003143/1.5, allocations: 0.813 MB / 0.7596 GB, free: 155.7 MB / 0.5138 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 0.0004011/1.5, allocations: 77.69 kB / 0.7597 GB, free: 155.7 MB / 0.5138 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.008614/1.509, allocations: 5.811 MB / 0.7653 GB, free: 152.5 MB / 0.5138 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 1.049e-05/1.509, allocations: 16.97 kB / 0.7654 GB, free: 152.5 MB / 0.5138 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.01329/1.522, allocations: 8.295 MB / 0.7735 GB, free: 149 MB / 0.5138 GB Notification: Performance of postOpt removeConstants (simulation): time 0.00234/1.524, allocations: 0.9229 MB / 0.7744 GB, free: 148.6 MB / 0.5138 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0009052/1.525, allocations: 70.52 kB / 0.7744 GB, free: 148.5 MB / 0.5138 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.00201/1.527, allocations: 141.6 kB / 0.7746 GB, free: 148.5 MB / 0.5138 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.000428/1.528, allocations: 209.2 kB / 0.7748 GB, free: 148.4 MB / 0.5138 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 0.0001808/1.528, allocations: 107.2 kB / 0.7749 GB, free: 148.4 MB / 0.5138 GB Notification: Performance of sorting global known variables: time 0.004576/1.532, allocations: 3.701 MB / 0.7785 GB, free: 146.3 MB / 0.5138 GB Notification: Performance of sort global known variables: time 3.61e-07/1.532, allocations: 3.938 kB / 0.7785 GB, free: 146.3 MB / 0.5138 GB Notification: Performance of remove unused functions: time 0.006573/1.539, allocations: 1.635 MB / 0.7801 GB, free: 144.7 MB / 0.5138 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 51 * Number of states: 2 (j2.s,j2.v) * 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 (269): * Single equations (assignments): 262 * Array equations: 6 * Algorithm blocks: 0 * 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): 1 system {(2,30,100.0%)} * Non-linear torn systems (#iteration vars, #inner vars): 0 systems Notification: Performance of Backend phase and start with SimCode phase: time 0.01197/1.551, allocations: 9.051 MB / 0.7889 GB, free: 135.4 MB / 0.5138 GB Notification: Performance of simCode: created initialization part: time 0.0171/1.568, allocations: 11.2 MB / 0.7999 GB, free: 124.3 MB / 0.5138 GB Notification: Performance of simCode: created event and clocks part: time 1.686e-05/1.568, allocations: 0 / 0.7999 GB, free: 124.3 MB / 0.5138 GB Notification: Performance of simCode: created simulation system equations: time 0.003368/1.572, allocations: 2.393 MB / 0.8022 GB, free: 121.9 MB / 0.5138 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.004585/1.576, allocations: 0.7188 MB / 0.8029 GB, free: 121.2 MB / 0.5138 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.1082/1.684, allocations: 87.79 MB / 0.8886 GB, free: 20.99 MB / 0.5138 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.005902/1.69, allocations: 5.173 MB / 0.8937 GB, free: 15.79 MB / 0.5138 GB Notification: Performance of simCode: alias equations: time 0.006767/1.697, allocations: 2.97 MB / 0.8966 GB, free: 12.81 MB / 0.5138 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.004354/1.702, allocations: 3.342 MB / 0.8998 GB, free: 9.465 MB / 0.5138 GB Notification: Performance of SimCode: time 1.293e-06/1.702, allocations: 1.312 kB / 0.8998 GB, free: 9.465 MB / 0.5138 GB Notification: Performance of buildModelFMU: Generate the FMI files: time 0.4136/2.115, allocations: 116.8 MB / 1.014 GB, free: 114.2 MB / 0.5294 GB Notification: Performance of buildModelFMU: Generate platform static: time 13.35/15.47, allocations: 15.77 kB / 1.014 GB, free: 114.2 MB / 0.5294 GB (rm -f ModelicaTest_3.2.3_ModelicaTest.MultiBody.FourbarVariants.JointSSR.pipe ; mkfifo ModelicaTest_3.2.3_ModelicaTest.MultiBody.FourbarVariants.JointSSR.pipe ; head -c 1048576 < ModelicaTest_3.2.3_ModelicaTest.MultiBody.FourbarVariants.JointSSR.pipe >> ../files/ModelicaTest_3.2.3_ModelicaTest.MultiBody.FourbarVariants.JointSSR.sim & /home/hudson/saved_omc/OMSimulator/install/bin/OMSimulator -r=ModelicaTest_3.2.3_ModelicaTest.MultiBody.FourbarVariants.JointSSR_res.mat --tempDir=temp_ModelicaTest_3_2_3_ModelicaTest_MultiBody_FourbarVariants_JointSSR_fmu --startTime=0 --stopTime=1.1 --timeout=50 --tolerance=1e-06 ModelicaTest_3_2_3_ModelicaTest_MultiBody_FourbarVariants_JointSSR.fmu > ModelicaTest_3.2.3_ModelicaTest.MultiBody.FourbarVariants.JointSSR.pipe 2>&1) diffSimulationResults("ModelicaTest_3.2.3_ModelicaTest.MultiBody.FourbarVariants.JointSSR_res.mat","/var/lib/jenkins1/ws/OpenModelicaLibraryTestingWork/Reference-modelica.org/ReferenceResults/MAP-LIB_ReferenceResults/v3.2.3+build.4/ModelicaTest/MultiBody/FourbarVariants/JointSSR/JointSSR.csv","/var/lib/jenkins1/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/files/ModelicaTest_3.2.3_ModelicaTest.MultiBody.FourbarVariants.JointSSR.diff",relTol=0.003,relTolDiffMinMax=0.003,rangeDelta=0.001) Reference file matches