/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_09-ptrmunge_racing.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 12:37:19,511 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 12:37:19,576 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-24 12:37:19,580 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 12:37:19,581 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 12:37:19,610 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 12:37:19,611 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 12:37:19,611 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 12:37:19,612 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 12:37:19,616 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 12:37:19,616 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 12:37:19,616 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 12:37:19,616 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 12:37:19,617 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 12:37:19,618 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 12:37:19,618 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 12:37:19,618 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 12:37:19,618 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 12:37:19,619 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 12:37:19,619 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 12:37:19,619 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 12:37:19,619 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 12:37:19,619 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 12:37:19,620 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 12:37:19,620 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 12:37:19,620 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 12:37:19,621 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 12:37:19,621 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 12:37:19,621 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 12:37:19,621 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 12:37:19,622 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 12:37:19,622 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 12:37:19,622 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 12:37:19,622 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 12:37:19,622 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 12:37:19,623 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-24 12:37:19,929 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 12:37:19,954 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 12:37:19,956 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 12:37:19,957 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 12:37:19,958 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 12:37:19,959 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_09-ptrmunge_racing.i [2023-08-24 12:37:21,073 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 12:37:21,370 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 12:37:21,371 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_09-ptrmunge_racing.i [2023-08-24 12:37:21,392 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17c2c644e/c3a6c765059646d08170ef624a4ca33d/FLAG674368fd9 [2023-08-24 12:37:21,408 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17c2c644e/c3a6c765059646d08170ef624a4ca33d [2023-08-24 12:37:21,413 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 12:37:21,414 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 12:37:21,416 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 12:37:21,417 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 12:37:21,419 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 12:37:21,421 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 12:37:21" (1/1) ... [2023-08-24 12:37:21,422 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5164ccf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:37:21, skipping insertion in model container [2023-08-24 12:37:21,422 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 12:37:21" (1/1) ... [2023-08-24 12:37:21,469 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 12:37:21,798 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_09-ptrmunge_racing.i[30176,30189] [2023-08-24 12:37:21,827 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 12:37:21,844 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 12:37:21,874 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-24 12:37:21,876 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-24 12:37:21,884 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_09-ptrmunge_racing.i[30176,30189] [2023-08-24 12:37:21,906 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 12:37:21,947 INFO L206 MainTranslator]: Completed translation [2023-08-24 12:37:21,947 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:37:21 WrapperNode [2023-08-24 12:37:21,948 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 12:37:21,949 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 12:37:21,949 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 12:37:21,949 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 12:37:21,955 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:37:21" (1/1) ... [2023-08-24 12:37:21,973 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:37:21" (1/1) ... [2023-08-24 12:37:21,996 INFO L138 Inliner]: procedures = 172, calls = 50, calls flagged for inlining = 5, calls inlined = 6, statements flattened = 222 [2023-08-24 12:37:21,997 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 12:37:21,997 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 12:37:21,998 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 12:37:21,998 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 12:37:22,006 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:37:21" (1/1) ... [2023-08-24 12:37:22,006 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:37:21" (1/1) ... [2023-08-24 12:37:22,011 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:37:21" (1/1) ... [2023-08-24 12:37:22,012 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:37:21" (1/1) ... [2023-08-24 12:37:22,018 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:37:21" (1/1) ... [2023-08-24 12:37:22,039 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:37:21" (1/1) ... [2023-08-24 12:37:22,041 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:37:21" (1/1) ... [2023-08-24 12:37:22,042 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:37:21" (1/1) ... [2023-08-24 12:37:22,054 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 12:37:22,055 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 12:37:22,055 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 12:37:22,055 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 12:37:22,056 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:37:21" (1/1) ... [2023-08-24 12:37:22,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 12:37:22,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 12:37:22,088 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-24 12:37:22,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-24 12:37:22,119 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 12:37:22,119 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2023-08-24 12:37:22,119 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2023-08-24 12:37:22,119 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 12:37:22,119 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-24 12:37:22,119 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 12:37:22,120 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 12:37:22,120 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2023-08-24 12:37:22,120 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2023-08-24 12:37:22,120 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 12:37:22,120 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 12:37:22,120 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 12:37:22,120 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 12:37:22,121 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-24 12:37:22,258 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 12:37:22,259 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 12:37:22,530 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 12:37:22,536 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 12:37:22,537 INFO L302 CfgBuilder]: Removed 24 assume(true) statements. [2023-08-24 12:37:22,539 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 12:37:22 BoogieIcfgContainer [2023-08-24 12:37:22,539 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 12:37:22,541 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 12:37:22,541 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 12:37:22,543 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 12:37:22,544 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 12:37:21" (1/3) ... [2023-08-24 12:37:22,544 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fe78fdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 12:37:22, skipping insertion in model container [2023-08-24 12:37:22,544 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:37:21" (2/3) ... [2023-08-24 12:37:22,545 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fe78fdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 12:37:22, skipping insertion in model container [2023-08-24 12:37:22,545 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 12:37:22" (3/3) ... [2023-08-24 12:37:22,546 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_09-ptrmunge_racing.i [2023-08-24 12:37:22,578 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 12:37:22,579 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-24 12:37:22,579 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 12:37:22,716 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-24 12:37:22,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 192 places, 219 transitions, 460 flow [2023-08-24 12:37:22,914 INFO L124 PetriNetUnfolderBase]: 58/394 cut-off events. [2023-08-24 12:37:22,914 INFO L125 PetriNetUnfolderBase]: For 8/10 co-relation queries the response was YES. [2023-08-24 12:37:22,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 414 conditions, 394 events. 58/394 cut-off events. For 8/10 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1693 event pairs, 0 based on Foata normal form. 0/327 useless extension candidates. Maximal degree in co-relation 210. Up to 8 conditions per place. [2023-08-24 12:37:22,927 INFO L82 GeneralOperation]: Start removeDead. Operand has 192 places, 219 transitions, 460 flow [2023-08-24 12:37:22,941 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 192 places, 219 transitions, 460 flow [2023-08-24 12:37:22,946 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 12:37:22,957 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 192 places, 219 transitions, 460 flow [2023-08-24 12:37:22,960 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 192 places, 219 transitions, 460 flow [2023-08-24 12:37:22,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 192 places, 219 transitions, 460 flow [2023-08-24 12:37:23,025 INFO L124 PetriNetUnfolderBase]: 58/394 cut-off events. [2023-08-24 12:37:23,025 INFO L125 PetriNetUnfolderBase]: For 8/10 co-relation queries the response was YES. [2023-08-24 12:37:23,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 414 conditions, 394 events. 58/394 cut-off events. For 8/10 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1693 event pairs, 0 based on Foata normal form. 0/327 useless extension candidates. Maximal degree in co-relation 210. Up to 8 conditions per place. [2023-08-24 12:37:23,044 INFO L119 LiptonReduction]: Number of co-enabled transitions 19642 [2023-08-24 12:37:27,288 INFO L134 LiptonReduction]: Checked pairs total: 31675 [2023-08-24 12:37:27,289 INFO L136 LiptonReduction]: Total number of compositions: 165 [2023-08-24 12:37:27,300 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 12:37:27,305 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@103ec347, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 12:37:27,306 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-24 12:37:27,310 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 12:37:27,310 INFO L124 PetriNetUnfolderBase]: 6/41 cut-off events. [2023-08-24 12:37:27,310 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 12:37:27,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:37:27,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-24 12:37:27,312 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t1_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-24 12:37:27,316 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:37:27,316 INFO L85 PathProgramCache]: Analyzing trace with hash 115496020, now seen corresponding path program 1 times [2023-08-24 12:37:27,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:37:27,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536763780] [2023-08-24 12:37:27,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:37:27,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:37:27,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:37:27,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 12:37:27,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:37:27,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536763780] [2023-08-24 12:37:27,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536763780] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 12:37:27,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 12:37:27,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-24 12:37:27,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180875100] [2023-08-24 12:37:27,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 12:37:27,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 12:37:27,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:37:27,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 12:37:27,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 12:37:27,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 384 [2023-08-24 12:37:27,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 79 transitions, 180 flow. Second operand has 5 states, 5 states have (on average 145.2) internal successors, (726), 5 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:37:27,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:37:27,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 384 [2023-08-24 12:37:27,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 12:37:28,719 INFO L124 PetriNetUnfolderBase]: 4671/7783 cut-off events. [2023-08-24 12:37:28,719 INFO L125 PetriNetUnfolderBase]: For 193/193 co-relation queries the response was YES. [2023-08-24 12:37:28,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15229 conditions, 7783 events. 4671/7783 cut-off events. For 193/193 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 50392 event pairs, 3182 based on Foata normal form. 1070/7173 useless extension candidates. Maximal degree in co-relation 13929. Up to 5907 conditions per place. [2023-08-24 12:37:28,747 INFO L140 encePairwiseOnDemand]: 354/384 looper letters, 76 selfloop transitions, 8 changer transitions 43/138 dead transitions. [2023-08-24 12:37:28,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 138 transitions, 573 flow [2023-08-24 12:37:28,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 12:37:28,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 12:37:28,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1187 transitions. [2023-08-24 12:37:28,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4415922619047619 [2023-08-24 12:37:28,765 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1187 transitions. [2023-08-24 12:37:28,765 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1187 transitions. [2023-08-24 12:37:28,768 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 12:37:28,771 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1187 transitions. [2023-08-24 12:37:28,776 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 169.57142857142858) internal successors, (1187), 7 states have internal predecessors, (1187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:37:28,785 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 384.0) internal successors, (3072), 8 states have internal predecessors, (3072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:37:28,786 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 384.0) internal successors, (3072), 8 states have internal predecessors, (3072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:37:28,788 INFO L175 Difference]: Start difference. First operand has 58 places, 79 transitions, 180 flow. Second operand 7 states and 1187 transitions. [2023-08-24 12:37:28,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 138 transitions, 573 flow [2023-08-24 12:37:28,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 138 transitions, 573 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 12:37:28,797 INFO L231 Difference]: Finished difference. Result has 70 places, 66 transitions, 216 flow [2023-08-24 12:37:28,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=216, PETRI_PLACES=70, PETRI_TRANSITIONS=66} [2023-08-24 12:37:28,802 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 12 predicate places. [2023-08-24 12:37:28,803 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 66 transitions, 216 flow [2023-08-24 12:37:28,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 145.2) internal successors, (726), 5 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:37:28,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:37:28,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 12:37:28,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 12:37:28,804 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t1_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-24 12:37:28,805 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:37:28,805 INFO L85 PathProgramCache]: Analyzing trace with hash 822762224, now seen corresponding path program 1 times [2023-08-24 12:37:28,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:37:28,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479541859] [2023-08-24 12:37:28,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:37:28,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:37:28,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:37:28,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 12:37:28,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:37:28,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479541859] [2023-08-24 12:37:28,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479541859] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 12:37:28,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 12:37:28,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 12:37:28,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617894223] [2023-08-24 12:37:28,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 12:37:28,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 12:37:28,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:37:28,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 12:37:28,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 12:37:28,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 384 [2023-08-24 12:37:28,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 66 transitions, 216 flow. Second operand has 3 states, 3 states have (on average 179.33333333333334) internal successors, (538), 3 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:37:28,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:37:28,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 384 [2023-08-24 12:37:28,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 12:37:29,492 INFO L124 PetriNetUnfolderBase]: 4058/7114 cut-off events. [2023-08-24 12:37:29,492 INFO L125 PetriNetUnfolderBase]: For 3210/3210 co-relation queries the response was YES. [2023-08-24 12:37:29,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15903 conditions, 7114 events. 4058/7114 cut-off events. For 3210/3210 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 48756 event pairs, 3302 based on Foata normal form. 1/6305 useless extension candidates. Maximal degree in co-relation 15413. Up to 6273 conditions per place. [2023-08-24 12:37:29,524 INFO L140 encePairwiseOnDemand]: 381/384 looper letters, 64 selfloop transitions, 2 changer transitions 1/80 dead transitions. [2023-08-24 12:37:29,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 80 transitions, 392 flow [2023-08-24 12:37:29,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 12:37:29,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 12:37:29,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 592 transitions. [2023-08-24 12:37:29,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5138888888888888 [2023-08-24 12:37:29,527 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 592 transitions. [2023-08-24 12:37:29,527 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 592 transitions. [2023-08-24 12:37:29,527 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 12:37:29,528 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 592 transitions. [2023-08-24 12:37:29,529 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 197.33333333333334) internal successors, (592), 3 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:37:29,531 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 384.0) internal successors, (1536), 4 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:37:29,532 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 384.0) internal successors, (1536), 4 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:37:29,532 INFO L175 Difference]: Start difference. First operand has 70 places, 66 transitions, 216 flow. Second operand 3 states and 592 transitions. [2023-08-24 12:37:29,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 80 transitions, 392 flow [2023-08-24 12:37:29,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 80 transitions, 386 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-24 12:37:29,551 INFO L231 Difference]: Finished difference. Result has 69 places, 66 transitions, 218 flow [2023-08-24 12:37:29,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=218, PETRI_PLACES=69, PETRI_TRANSITIONS=66} [2023-08-24 12:37:29,552 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 11 predicate places. [2023-08-24 12:37:29,552 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 66 transitions, 218 flow [2023-08-24 12:37:29,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 179.33333333333334) internal successors, (538), 3 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:37:29,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:37:29,553 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 12:37:29,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-24 12:37:29,553 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t1_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t1_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-24 12:37:29,554 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:37:29,554 INFO L85 PathProgramCache]: Analyzing trace with hash -671618628, now seen corresponding path program 1 times [2023-08-24 12:37:29,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:37:29,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747385861] [2023-08-24 12:37:29,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:37:29,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:37:29,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:37:29,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 12:37:29,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:37:29,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747385861] [2023-08-24 12:37:29,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747385861] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 12:37:29,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734783760] [2023-08-24 12:37:29,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:37:29,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 12:37:29,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 12:37:29,780 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 12:37:29,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-24 12:37:29,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:37:29,920 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-24 12:37:29,924 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 12:37:29,974 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 12:37:29,975 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-24 12:37:30,007 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-24 12:37:30,077 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-24 12:37:30,097 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 12:37:30,097 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 12:37:30,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 12:37:30,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734783760] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 12:37:30,180 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 12:37:30,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2023-08-24 12:37:30,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608725256] [2023-08-24 12:37:30,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 12:37:30,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-24 12:37:30,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:37:30,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-24 12:37:30,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=55, Unknown=8, NotChecked=0, Total=90 [2023-08-24 12:37:30,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 384 [2023-08-24 12:37:30,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 66 transitions, 218 flow. Second operand has 10 states, 10 states have (on average 146.3) internal successors, (1463), 10 states have internal predecessors, (1463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:37:30,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:37:30,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 384 [2023-08-24 12:37:30,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 12:37:31,005 INFO L124 PetriNetUnfolderBase]: 4528/7561 cut-off events. [2023-08-24 12:37:31,006 INFO L125 PetriNetUnfolderBase]: For 2433/2435 co-relation queries the response was YES. [2023-08-24 12:37:31,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17011 conditions, 7561 events. 4528/7561 cut-off events. For 2433/2435 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 49158 event pairs, 2537 based on Foata normal form. 1/6676 useless extension candidates. Maximal degree in co-relation 16886. Up to 5754 conditions per place. [2023-08-24 12:37:31,047 INFO L140 encePairwiseOnDemand]: 378/384 looper letters, 74 selfloop transitions, 7 changer transitions 25/116 dead transitions. [2023-08-24 12:37:31,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 116 transitions, 565 flow [2023-08-24 12:37:31,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 12:37:31,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 12:37:31,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 826 transitions. [2023-08-24 12:37:31,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43020833333333336 [2023-08-24 12:37:31,050 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 826 transitions. [2023-08-24 12:37:31,050 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 826 transitions. [2023-08-24 12:37:31,051 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 12:37:31,051 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 826 transitions. [2023-08-24 12:37:31,053 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 165.2) internal successors, (826), 5 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:37:31,056 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 384.0) internal successors, (2304), 6 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:37:31,058 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 384.0) internal successors, (2304), 6 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:37:31,058 INFO L175 Difference]: Start difference. First operand has 69 places, 66 transitions, 218 flow. Second operand 5 states and 826 transitions. [2023-08-24 12:37:31,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 116 transitions, 565 flow [2023-08-24 12:37:31,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 116 transitions, 557 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-24 12:37:31,064 INFO L231 Difference]: Finished difference. Result has 72 places, 64 transitions, 223 flow [2023-08-24 12:37:31,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=223, PETRI_PLACES=72, PETRI_TRANSITIONS=64} [2023-08-24 12:37:31,065 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 14 predicate places. [2023-08-24 12:37:31,065 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 64 transitions, 223 flow [2023-08-24 12:37:31,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 146.3) internal successors, (1463), 10 states have internal predecessors, (1463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:37:31,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:37:31,066 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 12:37:31,074 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-24 12:37:31,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 12:37:31,272 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t1_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-24 12:37:31,272 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:37:31,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1980881996, now seen corresponding path program 1 times [2023-08-24 12:37:31,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:37:31,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908339308] [2023-08-24 12:37:31,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:37:31,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:37:31,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:37:31,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 12:37:31,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:37:31,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908339308] [2023-08-24 12:37:31,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908339308] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 12:37:31,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035520363] [2023-08-24 12:37:31,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:37:31,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 12:37:31,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 12:37:31,335 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 12:37:31,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-24 12:37:31,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:37:31,423 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-24 12:37:31,425 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 12:37:31,442 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 12:37:31,443 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 12:37:31,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 12:37:31,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035520363] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 12:37:31,462 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 12:37:31,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-24 12:37:31,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426961734] [2023-08-24 12:37:31,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 12:37:31,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 12:37:31,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:37:31,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 12:37:31,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-24 12:37:31,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 384 [2023-08-24 12:37:31,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 64 transitions, 223 flow. Second operand has 7 states, 7 states have (on average 179.57142857142858) internal successors, (1257), 7 states have internal predecessors, (1257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:37:31,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:37:31,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 384 [2023-08-24 12:37:31,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 12:37:31,509 INFO L124 PetriNetUnfolderBase]: 20/77 cut-off events. [2023-08-24 12:37:31,509 INFO L125 PetriNetUnfolderBase]: For 56/56 co-relation queries the response was YES. [2023-08-24 12:37:31,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 210 conditions, 77 events. 20/77 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 191 event pairs, 5 based on Foata normal form. 15/89 useless extension candidates. Maximal degree in co-relation 199. Up to 50 conditions per place. [2023-08-24 12:37:31,510 INFO L140 encePairwiseOnDemand]: 381/384 looper letters, 0 selfloop transitions, 0 changer transitions 35/35 dead transitions. [2023-08-24 12:37:31,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 35 transitions, 183 flow [2023-08-24 12:37:31,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 12:37:31,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 12:37:31,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 740 transitions. [2023-08-24 12:37:31,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4817708333333333 [2023-08-24 12:37:31,513 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 740 transitions. [2023-08-24 12:37:31,513 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 740 transitions. [2023-08-24 12:37:31,513 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 12:37:31,513 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 740 transitions. [2023-08-24 12:37:31,515 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:37:31,518 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 384.0) internal successors, (1920), 5 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:37:31,518 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 384.0) internal successors, (1920), 5 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:37:31,518 INFO L175 Difference]: Start difference. First operand has 72 places, 64 transitions, 223 flow. Second operand 4 states and 740 transitions. [2023-08-24 12:37:31,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 35 transitions, 183 flow [2023-08-24 12:37:31,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 35 transitions, 143 flow, removed 4 selfloop flow, removed 10 redundant places. [2023-08-24 12:37:31,519 INFO L231 Difference]: Finished difference. Result has 29 places, 0 transitions, 0 flow [2023-08-24 12:37:31,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=49, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=29, PETRI_TRANSITIONS=0} [2023-08-24 12:37:31,520 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, -29 predicate places. [2023-08-24 12:37:31,520 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 0 transitions, 0 flow [2023-08-24 12:37:31,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 179.57142857142858) internal successors, (1257), 7 states have internal predecessors, (1257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:37:31,523 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-08-24 12:37:31,524 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-08-24 12:37:31,524 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-08-24 12:37:31,524 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-08-24 12:37:31,536 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-24 12:37:31,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-08-24 12:37:31,730 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-24 12:37:31,732 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-24 12:37:31,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 192 places, 219 transitions, 460 flow [2023-08-24 12:37:31,779 INFO L124 PetriNetUnfolderBase]: 58/394 cut-off events. [2023-08-24 12:37:31,779 INFO L125 PetriNetUnfolderBase]: For 8/10 co-relation queries the response was YES. [2023-08-24 12:37:31,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 414 conditions, 394 events. 58/394 cut-off events. For 8/10 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1693 event pairs, 0 based on Foata normal form. 0/327 useless extension candidates. Maximal degree in co-relation 210. Up to 8 conditions per place. [2023-08-24 12:37:31,782 INFO L82 GeneralOperation]: Start removeDead. Operand has 192 places, 219 transitions, 460 flow [2023-08-24 12:37:31,784 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 192 places, 219 transitions, 460 flow [2023-08-24 12:37:31,784 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 12:37:31,784 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 192 places, 219 transitions, 460 flow [2023-08-24 12:37:31,785 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 192 places, 219 transitions, 460 flow [2023-08-24 12:37:31,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 192 places, 219 transitions, 460 flow [2023-08-24 12:37:31,822 INFO L124 PetriNetUnfolderBase]: 58/394 cut-off events. [2023-08-24 12:37:31,822 INFO L125 PetriNetUnfolderBase]: For 8/10 co-relation queries the response was YES. [2023-08-24 12:37:31,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 414 conditions, 394 events. 58/394 cut-off events. For 8/10 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1693 event pairs, 0 based on Foata normal form. 0/327 useless extension candidates. Maximal degree in co-relation 210. Up to 8 conditions per place. [2023-08-24 12:37:31,835 INFO L119 LiptonReduction]: Number of co-enabled transitions 19642 [2023-08-24 12:37:35,555 INFO L134 LiptonReduction]: Checked pairs total: 31683 [2023-08-24 12:37:35,555 INFO L136 LiptonReduction]: Total number of compositions: 167 [2023-08-24 12:37:35,557 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-24 12:37:35,558 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@103ec347, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 12:37:35,558 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-24 12:37:35,560 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 12:37:35,560 INFO L124 PetriNetUnfolderBase]: 1/21 cut-off events. [2023-08-24 12:37:35,561 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 12:37:35,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:37:35,561 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-24 12:37:35,561 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 12:37:35,561 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:37:35,561 INFO L85 PathProgramCache]: Analyzing trace with hash 925926386, now seen corresponding path program 1 times [2023-08-24 12:37:35,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:37:35,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119650045] [2023-08-24 12:37:35,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:37:35,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:37:35,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 12:37:35,572 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 12:37:35,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 12:37:35,592 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 12:37:35,592 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 12:37:35,592 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-24 12:37:35,593 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-24 12:37:35,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-24 12:37:35,593 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-24 12:37:35,594 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (2/2) [2023-08-24 12:37:35,594 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 12:37:35,594 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-24 12:37:35,634 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-24 12:37:35,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 296 places, 347 transitions, 742 flow [2023-08-24 12:37:35,785 INFO L124 PetriNetUnfolderBase]: 197/1147 cut-off events. [2023-08-24 12:37:35,785 INFO L125 PetriNetUnfolderBase]: For 72/78 co-relation queries the response was YES. [2023-08-24 12:37:35,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1244 conditions, 1147 events. 197/1147 cut-off events. For 72/78 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 6935 event pairs, 2 based on Foata normal form. 0/955 useless extension candidates. Maximal degree in co-relation 695. Up to 32 conditions per place. [2023-08-24 12:37:35,809 INFO L82 GeneralOperation]: Start removeDead. Operand has 296 places, 347 transitions, 742 flow [2023-08-24 12:37:35,823 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 296 places, 347 transitions, 742 flow [2023-08-24 12:37:35,823 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 12:37:35,823 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 296 places, 347 transitions, 742 flow [2023-08-24 12:37:35,824 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 296 places, 347 transitions, 742 flow [2023-08-24 12:37:35,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 296 places, 347 transitions, 742 flow [2023-08-24 12:37:35,977 INFO L124 PetriNetUnfolderBase]: 197/1147 cut-off events. [2023-08-24 12:37:35,977 INFO L125 PetriNetUnfolderBase]: For 72/78 co-relation queries the response was YES. [2023-08-24 12:37:36,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1244 conditions, 1147 events. 197/1147 cut-off events. For 72/78 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 6935 event pairs, 2 based on Foata normal form. 0/955 useless extension candidates. Maximal degree in co-relation 695. Up to 32 conditions per place. [2023-08-24 12:37:36,053 INFO L119 LiptonReduction]: Number of co-enabled transitions 71492 [2023-08-24 12:37:40,944 INFO L134 LiptonReduction]: Checked pairs total: 148188 [2023-08-24 12:37:40,944 INFO L136 LiptonReduction]: Total number of compositions: 255 [2023-08-24 12:37:40,946 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 12:37:40,947 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@103ec347, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 12:37:40,947 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-24 12:37:40,951 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 12:37:40,951 INFO L124 PetriNetUnfolderBase]: 7/41 cut-off events. [2023-08-24 12:37:40,951 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-24 12:37:40,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:37:40,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-24 12:37:40,951 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t1_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-24 12:37:40,952 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:37:40,952 INFO L85 PathProgramCache]: Analyzing trace with hash 81022393, now seen corresponding path program 1 times [2023-08-24 12:37:40,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:37:40,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022596505] [2023-08-24 12:37:40,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:37:40,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:37:40,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:37:41,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 12:37:41,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:37:41,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022596505] [2023-08-24 12:37:41,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022596505] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 12:37:41,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 12:37:41,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-24 12:37:41,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732834443] [2023-08-24 12:37:41,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 12:37:41,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 12:37:41,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:37:41,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 12:37:41,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 12:37:41,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 230 out of 602 [2023-08-24 12:37:41,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 146 transitions, 340 flow. Second operand has 5 states, 5 states have (on average 231.4) internal successors, (1157), 5 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:37:41,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:37:41,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 230 of 602 [2023-08-24 12:37:41,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand