/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -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-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-ext/45_monabsex1_vs.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 15:10:47,771 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 15:10:47,863 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-SemanticLbe.epf [2023-11-17 15:10:47,901 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 15:10:47,902 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 15:10:47,903 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 15:10:47,904 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 15:10:47,904 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 15:10:47,904 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 15:10:47,909 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 15:10:47,910 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 15:10:47,911 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 15:10:47,911 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 15:10:47,912 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 15:10:47,912 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 15:10:47,913 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 15:10:47,913 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 15:10:47,913 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 15:10:47,913 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 15:10:47,913 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 15:10:47,914 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 15:10:47,914 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 15:10:47,915 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 15:10:47,915 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 15:10:47,915 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 15:10:47,915 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 15:10:47,915 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 15:10:47,916 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 15:10:47,916 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 15:10:47,916 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 15:10:47,917 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 15:10:47,917 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 15:10:47,917 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-11-17 15:10:48,148 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 15:10:48,168 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 15:10:48,171 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 15:10:48,172 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 15:10:48,173 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 15:10:48,174 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/45_monabsex1_vs.i [2023-11-17 15:10:49,315 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 15:10:49,545 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 15:10:49,546 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/45_monabsex1_vs.i [2023-11-17 15:10:49,559 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6cb63eb22/a6301af837a940adb2af15c394db71c8/FLAG079f3961c [2023-11-17 15:10:49,573 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6cb63eb22/a6301af837a940adb2af15c394db71c8 [2023-11-17 15:10:49,575 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 15:10:49,576 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 15:10:49,577 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 15:10:49,578 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 15:10:49,582 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 15:10:49,582 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:10:49" (1/1) ... [2023-11-17 15:10:49,583 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d570186 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:10:49, skipping insertion in model container [2023-11-17 15:10:49,583 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:10:49" (1/1) ... [2023-11-17 15:10:49,616 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 15:10:49,761 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-17 15:10:49,897 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/45_monabsex1_vs.i[30633,30646] [2023-11-17 15:10:49,906 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 15:10:49,917 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 15:10:49,939 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-17 15:10:49,959 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/45_monabsex1_vs.i[30633,30646] [2023-11-17 15:10:49,963 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 15:10:49,987 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 15:10:49,987 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 15:10:49,987 WARN L675 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 15:10:49,994 INFO L206 MainTranslator]: Completed translation [2023-11-17 15:10:49,994 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:10:49 WrapperNode [2023-11-17 15:10:49,994 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 15:10:49,995 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 15:10:49,996 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 15:10:49,996 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 15:10:50,002 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:10:49" (1/1) ... [2023-11-17 15:10:50,014 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:10:49" (1/1) ... [2023-11-17 15:10:50,032 INFO L138 Inliner]: procedures = 171, calls = 15, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 26 [2023-11-17 15:10:50,032 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 15:10:50,033 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 15:10:50,033 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 15:10:50,033 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 15:10:50,040 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:10:49" (1/1) ... [2023-11-17 15:10:50,040 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:10:49" (1/1) ... [2023-11-17 15:10:50,044 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:10:49" (1/1) ... [2023-11-17 15:10:50,044 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:10:49" (1/1) ... [2023-11-17 15:10:50,047 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:10:49" (1/1) ... [2023-11-17 15:10:50,050 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:10:49" (1/1) ... [2023-11-17 15:10:50,051 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:10:49" (1/1) ... [2023-11-17 15:10:50,052 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:10:49" (1/1) ... [2023-11-17 15:10:50,054 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 15:10:50,055 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 15:10:50,055 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 15:10:50,055 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 15:10:50,056 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:10:49" (1/1) ... [2023-11-17 15:10:50,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 15:10:50,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:10:50,088 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) [2023-11-17 15:10:50,092 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 [2023-11-17 15:10:50,110 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-17 15:10:50,110 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-17 15:10:50,111 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 15:10:50,111 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-17 15:10:50,111 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 15:10:50,111 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 15:10:50,111 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 15:10:50,111 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 15:10:50,111 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-17 15:10:50,111 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 15:10:50,111 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 15:10:50,113 WARN L211 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-17 15:10:50,213 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 15:10:50,215 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 15:10:50,350 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 15:10:50,366 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 15:10:50,366 INFO L307 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-17 15:10:50,367 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:10:50 BoogieIcfgContainer [2023-11-17 15:10:50,368 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 15:10:50,370 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 15:10:50,370 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 15:10:50,373 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 15:10:50,373 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 03:10:49" (1/3) ... [2023-11-17 15:10:50,374 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b5a3191 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:10:50, skipping insertion in model container [2023-11-17 15:10:50,374 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:10:49" (2/3) ... [2023-11-17 15:10:50,374 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b5a3191 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:10:50, skipping insertion in model container [2023-11-17 15:10:50,374 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:10:50" (3/3) ... [2023-11-17 15:10:50,376 INFO L112 eAbstractionObserver]: Analyzing ICFG 45_monabsex1_vs.i [2023-11-17 15:10:50,392 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 15:10:50,392 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 15:10:50,393 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 15:10:50,445 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:10:50,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 42 places, 41 transitions, 86 flow [2023-11-17 15:10:50,513 INFO L124 PetriNetUnfolderBase]: 3/52 cut-off events. [2023-11-17 15:10:50,513 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:10:50,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56 conditions, 52 events. 3/52 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 55 event pairs, 0 based on Foata normal form. 0/46 useless extension candidates. Maximal degree in co-relation 25. Up to 4 conditions per place. [2023-11-17 15:10:50,517 INFO L82 GeneralOperation]: Start removeDead. Operand has 42 places, 41 transitions, 86 flow [2023-11-17 15:10:50,520 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 41 transitions, 86 flow [2023-11-17 15:10:50,523 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:10:50,567 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 42 places, 41 transitions, 86 flow [2023-11-17 15:10:50,571 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 42 places, 41 transitions, 86 flow [2023-11-17 15:10:50,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 42 places, 41 transitions, 86 flow [2023-11-17 15:10:50,601 INFO L124 PetriNetUnfolderBase]: 3/52 cut-off events. [2023-11-17 15:10:50,601 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:10:50,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56 conditions, 52 events. 3/52 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 55 event pairs, 0 based on Foata normal form. 0/46 useless extension candidates. Maximal degree in co-relation 25. Up to 4 conditions per place. [2023-11-17 15:10:50,603 INFO L119 LiptonReduction]: Number of co-enabled transitions 336 [2023-11-17 15:10:51,662 INFO L134 LiptonReduction]: Checked pairs total: 303 [2023-11-17 15:10:51,663 INFO L136 LiptonReduction]: Total number of compositions: 39 [2023-11-17 15:10:51,677 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:10:51,683 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=LoopHeads, 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;@7144ba59, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:10:51,683 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-17 15:10:51,686 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:10:51,686 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2023-11-17 15:10:51,686 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:10:51,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:10:51,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 15:10:51,687 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-17 15:10:51,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:10:51,692 INFO L85 PathProgramCache]: Analyzing trace with hash 5775640, now seen corresponding path program 1 times [2023-11-17 15:10:51,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:10:51,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884522257] [2023-11-17 15:10:51,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:10:51,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:10:51,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:10:51,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:10:51,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:10:51,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884522257] [2023-11-17 15:10:51,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884522257] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:10:51,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:10:51,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 15:10:51,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122442921] [2023-11-17 15:10:51,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:10:51,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-17 15:10:51,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:10:51,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-17 15:10:51,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-17 15:10:51,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 80 [2023-11-17 15:10:51,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 11 places, 8 transitions, 20 flow. Second operand has 2 states, 2 states have (on average 37.0) internal successors, (74), 2 states have internal predecessors, (74), 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) [2023-11-17 15:10:51,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:10:51,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 80 [2023-11-17 15:10:51,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:10:51,923 INFO L124 PetriNetUnfolderBase]: 2/11 cut-off events. [2023-11-17 15:10:51,924 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:10:51,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26 conditions, 11 events. 2/11 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 9 event pairs, 2 based on Foata normal form. 0/11 useless extension candidates. Maximal degree in co-relation 14. Up to 11 conditions per place. [2023-11-17 15:10:51,925 INFO L140 encePairwiseOnDemand]: 78/80 looper letters, 5 selfloop transitions, 0 changer transitions 0/6 dead transitions. [2023-11-17 15:10:51,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 10 places, 6 transitions, 26 flow [2023-11-17 15:10:51,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-17 15:10:51,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-17 15:10:51,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 77 transitions. [2023-11-17 15:10:51,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48125 [2023-11-17 15:10:51,937 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 77 transitions. [2023-11-17 15:10:51,937 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 77 transitions. [2023-11-17 15:10:51,938 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:10:51,940 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 77 transitions. [2023-11-17 15:10:51,942 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 38.5) internal successors, (77), 2 states have internal predecessors, (77), 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) [2023-11-17 15:10:51,949 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 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) [2023-11-17 15:10:51,949 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 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) [2023-11-17 15:10:51,951 INFO L175 Difference]: Start difference. First operand has 11 places, 8 transitions, 20 flow. Second operand 2 states and 77 transitions. [2023-11-17 15:10:51,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 10 places, 6 transitions, 26 flow [2023-11-17 15:10:51,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 10 places, 6 transitions, 26 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:10:51,956 INFO L231 Difference]: Finished difference. Result has 10 places, 6 transitions, 16 flow [2023-11-17 15:10:51,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=16, PETRI_DIFFERENCE_MINUEND_PLACES=9, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=16, PETRI_PLACES=10, PETRI_TRANSITIONS=6} [2023-11-17 15:10:51,962 INFO L281 CegarLoopForPetriNet]: 11 programPoint places, -1 predicate places. [2023-11-17 15:10:51,963 INFO L495 AbstractCegarLoop]: Abstraction has has 10 places, 6 transitions, 16 flow [2023-11-17 15:10:51,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 37.0) internal successors, (74), 2 states have internal predecessors, (74), 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) [2023-11-17 15:10:51,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:10:51,963 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-17 15:10:51,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 15:10:51,964 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-17 15:10:51,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:10:51,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1255411083, now seen corresponding path program 1 times [2023-11-17 15:10:51,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:10:51,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484192827] [2023-11-17 15:10:51,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:10:51,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:10:52,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:10:52,010 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:10:52,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:10:52,047 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:10:52,048 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:10:52,051 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-11-17 15:10:52,053 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-11-17 15:10:52,053 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-11-17 15:10:52,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 15:10:52,054 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 15:10:52,057 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:10:52,057 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-17 15:10:52,077 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:10:52,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 56 places, 54 transitions, 118 flow [2023-11-17 15:10:52,093 INFO L124 PetriNetUnfolderBase]: 5/78 cut-off events. [2023-11-17 15:10:52,093 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 15:10:52,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86 conditions, 78 events. 5/78 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 109 event pairs, 0 based on Foata normal form. 0/68 useless extension candidates. Maximal degree in co-relation 53. Up to 6 conditions per place. [2023-11-17 15:10:52,094 INFO L82 GeneralOperation]: Start removeDead. Operand has 56 places, 54 transitions, 118 flow [2023-11-17 15:10:52,095 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 56 places, 54 transitions, 118 flow [2023-11-17 15:10:52,095 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:10:52,096 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 56 places, 54 transitions, 118 flow [2023-11-17 15:10:52,096 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 56 places, 54 transitions, 118 flow [2023-11-17 15:10:52,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 56 places, 54 transitions, 118 flow [2023-11-17 15:10:52,109 INFO L124 PetriNetUnfolderBase]: 5/78 cut-off events. [2023-11-17 15:10:52,109 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 15:10:52,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86 conditions, 78 events. 5/78 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 109 event pairs, 0 based on Foata normal form. 0/68 useless extension candidates. Maximal degree in co-relation 53. Up to 6 conditions per place. [2023-11-17 15:10:52,111 INFO L119 LiptonReduction]: Number of co-enabled transitions 984 [2023-11-17 15:10:53,115 INFO L134 LiptonReduction]: Checked pairs total: 1431 [2023-11-17 15:10:53,116 INFO L136 LiptonReduction]: Total number of compositions: 46 [2023-11-17 15:10:53,118 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:10:53,119 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=LoopHeads, 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;@7144ba59, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:10:53,119 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-17 15:10:53,123 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:10:53,124 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2023-11-17 15:10:53,124 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:10:53,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:10:53,124 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-17 15:10:53,124 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-17 15:10:53,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:10:53,125 INFO L85 PathProgramCache]: Analyzing trace with hash 287767484, now seen corresponding path program 1 times [2023-11-17 15:10:53,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:10:53,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683558888] [2023-11-17 15:10:53,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:10:53,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:10:53,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:10:53,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:10:53,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:10:53,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683558888] [2023-11-17 15:10:53,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683558888] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:10:53,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:10:53,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:10:53,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652830106] [2023-11-17 15:10:53,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:10:53,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:10:53,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:10:53,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:10:53,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:10:53,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 100 [2023-11-17 15:10:53,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 15 transitions, 40 flow. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 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) [2023-11-17 15:10:53,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:10:53,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 100 [2023-11-17 15:10:53,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:10:53,256 INFO L124 PetriNetUnfolderBase]: 42/97 cut-off events. [2023-11-17 15:10:53,257 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-11-17 15:10:53,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 204 conditions, 97 events. 42/97 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 415 event pairs, 16 based on Foata normal form. 0/78 useless extension candidates. Maximal degree in co-relation 160. Up to 47 conditions per place. [2023-11-17 15:10:53,258 INFO L140 encePairwiseOnDemand]: 94/100 looper letters, 13 selfloop transitions, 3 changer transitions 0/19 dead transitions. [2023-11-17 15:10:53,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 19 transitions, 85 flow [2023-11-17 15:10:53,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:10:53,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:10:53,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 135 transitions. [2023-11-17 15:10:53,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2023-11-17 15:10:53,260 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 135 transitions. [2023-11-17 15:10:53,260 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 135 transitions. [2023-11-17 15:10:53,261 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:10:53,261 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 135 transitions. [2023-11-17 15:10:53,262 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 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) [2023-11-17 15:10:53,263 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 100.0) internal successors, (400), 4 states have internal predecessors, (400), 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) [2023-11-17 15:10:53,263 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 100.0) internal successors, (400), 4 states have internal predecessors, (400), 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) [2023-11-17 15:10:53,263 INFO L175 Difference]: Start difference. First operand has 19 places, 15 transitions, 40 flow. Second operand 3 states and 135 transitions. [2023-11-17 15:10:53,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 19 transitions, 85 flow [2023-11-17 15:10:53,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 19 transitions, 85 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:10:53,265 INFO L231 Difference]: Finished difference. Result has 22 places, 15 transitions, 58 flow [2023-11-17 15:10:53,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=36, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=58, PETRI_PLACES=22, PETRI_TRANSITIONS=15} [2023-11-17 15:10:53,266 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 3 predicate places. [2023-11-17 15:10:53,266 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 15 transitions, 58 flow [2023-11-17 15:10:53,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 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) [2023-11-17 15:10:53,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:10:53,266 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:10:53,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 15:10:53,267 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-17 15:10:53,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:10:53,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1862979493, now seen corresponding path program 1 times [2023-11-17 15:10:53,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:10:53,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140859043] [2023-11-17 15:10:53,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:10:53,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:10:53,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:10:53,302 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 15:10:53,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:10:53,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140859043] [2023-11-17 15:10:53,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140859043] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:10:53,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:10:53,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:10:53,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873931697] [2023-11-17 15:10:53,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:10:53,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:10:53,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:10:53,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:10:53,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:10:53,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 100 [2023-11-17 15:10:53,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 15 transitions, 58 flow. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 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) [2023-11-17 15:10:53,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:10:53,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 100 [2023-11-17 15:10:53,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:10:53,350 INFO L124 PetriNetUnfolderBase]: 33/92 cut-off events. [2023-11-17 15:10:53,350 INFO L125 PetriNetUnfolderBase]: For 51/51 co-relation queries the response was YES. [2023-11-17 15:10:53,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 240 conditions, 92 events. 33/92 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 392 event pairs, 18 based on Foata normal form. 0/87 useless extension candidates. Maximal degree in co-relation 96. Up to 41 conditions per place. [2023-11-17 15:10:53,354 INFO L140 encePairwiseOnDemand]: 96/100 looper letters, 12 selfloop transitions, 4 changer transitions 0/19 dead transitions. [2023-11-17 15:10:53,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 19 transitions, 104 flow [2023-11-17 15:10:53,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:10:53,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:10:53,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 129 transitions. [2023-11-17 15:10:53,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43 [2023-11-17 15:10:53,356 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 129 transitions. [2023-11-17 15:10:53,356 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 129 transitions. [2023-11-17 15:10:53,356 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:10:53,357 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 129 transitions. [2023-11-17 15:10:53,357 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 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) [2023-11-17 15:10:53,358 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 100.0) internal successors, (400), 4 states have internal predecessors, (400), 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) [2023-11-17 15:10:53,359 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 100.0) internal successors, (400), 4 states have internal predecessors, (400), 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) [2023-11-17 15:10:53,359 INFO L175 Difference]: Start difference. First operand has 22 places, 15 transitions, 58 flow. Second operand 3 states and 129 transitions. [2023-11-17 15:10:53,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 19 transitions, 104 flow [2023-11-17 15:10:53,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 19 transitions, 96 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-17 15:10:53,361 INFO L231 Difference]: Finished difference. Result has 24 places, 17 transitions, 80 flow [2023-11-17 15:10:53,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=24, PETRI_TRANSITIONS=17} [2023-11-17 15:10:53,364 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 5 predicate places. [2023-11-17 15:10:53,364 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 17 transitions, 80 flow [2023-11-17 15:10:53,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 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) [2023-11-17 15:10:53,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:10:53,365 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:10:53,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 15:10:53,365 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-17 15:10:53,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:10:53,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1919003335, now seen corresponding path program 1 times [2023-11-17 15:10:53,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:10:53,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176261781] [2023-11-17 15:10:53,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:10:53,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:10:53,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:10:53,447 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 15:10:53,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:10:53,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176261781] [2023-11-17 15:10:53,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176261781] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:10:53,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:10:53,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 15:10:53,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019106274] [2023-11-17 15:10:53,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:10:53,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 15:10:53,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:10:53,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 15:10:53,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 15:10:53,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 100 [2023-11-17 15:10:53,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 17 transitions, 80 flow. Second operand has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 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) [2023-11-17 15:10:53,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:10:53,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 100 [2023-11-17 15:10:53,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:10:53,498 INFO L124 PetriNetUnfolderBase]: 29/78 cut-off events. [2023-11-17 15:10:53,498 INFO L125 PetriNetUnfolderBase]: For 57/57 co-relation queries the response was YES. [2023-11-17 15:10:53,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 243 conditions, 78 events. 29/78 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 297 event pairs, 6 based on Foata normal form. 0/74 useless extension candidates. Maximal degree in co-relation 190. Up to 61 conditions per place. [2023-11-17 15:10:53,500 INFO L140 encePairwiseOnDemand]: 98/100 looper letters, 14 selfloop transitions, 2 changer transitions 0/19 dead transitions. [2023-11-17 15:10:53,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 19 transitions, 121 flow [2023-11-17 15:10:53,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:10:53,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:10:53,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 128 transitions. [2023-11-17 15:10:53,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4266666666666667 [2023-11-17 15:10:53,507 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 128 transitions. [2023-11-17 15:10:53,508 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 128 transitions. [2023-11-17 15:10:53,509 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:10:53,509 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 128 transitions. [2023-11-17 15:10:53,511 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 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) [2023-11-17 15:10:53,513 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 100.0) internal successors, (400), 4 states have internal predecessors, (400), 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) [2023-11-17 15:10:53,513 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 100.0) internal successors, (400), 4 states have internal predecessors, (400), 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) [2023-11-17 15:10:53,513 INFO L175 Difference]: Start difference. First operand has 24 places, 17 transitions, 80 flow. Second operand 3 states and 128 transitions. [2023-11-17 15:10:53,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 19 transitions, 121 flow [2023-11-17 15:10:53,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 19 transitions, 113 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-17 15:10:53,516 INFO L231 Difference]: Finished difference. Result has 23 places, 16 transitions, 72 flow [2023-11-17 15:10:53,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=72, PETRI_PLACES=23, PETRI_TRANSITIONS=16} [2023-11-17 15:10:53,518 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 4 predicate places. [2023-11-17 15:10:53,518 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 16 transitions, 72 flow [2023-11-17 15:10:53,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 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) [2023-11-17 15:10:53,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:10:53,518 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:10:53,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 15:10:53,519 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-17 15:10:53,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:10:53,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1917791533, now seen corresponding path program 1 times [2023-11-17 15:10:53,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:10:53,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523391869] [2023-11-17 15:10:53,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:10:53,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:10:53,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:10:53,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 15:10:53,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:10:53,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523391869] [2023-11-17 15:10:53,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523391869] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:10:53,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:10:53,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 15:10:53,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435426477] [2023-11-17 15:10:53,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:10:53,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 15:10:53,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:10:53,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 15:10:53,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 15:10:53,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 100 [2023-11-17 15:10:53,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 16 transitions, 72 flow. Second operand has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 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) [2023-11-17 15:10:53,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:10:53,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 100 [2023-11-17 15:10:53,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:10:53,646 INFO L124 PetriNetUnfolderBase]: 25/76 cut-off events. [2023-11-17 15:10:53,646 INFO L125 PetriNetUnfolderBase]: For 61/61 co-relation queries the response was YES. [2023-11-17 15:10:53,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 221 conditions, 76 events. 25/76 cut-off events. For 61/61 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 300 event pairs, 8 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 92. Up to 45 conditions per place. [2023-11-17 15:10:53,648 INFO L140 encePairwiseOnDemand]: 98/100 looper letters, 12 selfloop transitions, 2 changer transitions 0/17 dead transitions. [2023-11-17 15:10:53,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 17 transitions, 102 flow [2023-11-17 15:10:53,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:10:53,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:10:53,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 126 transitions. [2023-11-17 15:10:53,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42 [2023-11-17 15:10:53,650 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 126 transitions. [2023-11-17 15:10:53,650 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 126 transitions. [2023-11-17 15:10:53,650 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:10:53,650 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 126 transitions. [2023-11-17 15:10:53,651 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 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) [2023-11-17 15:10:53,652 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 100.0) internal successors, (400), 4 states have internal predecessors, (400), 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) [2023-11-17 15:10:53,652 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 100.0) internal successors, (400), 4 states have internal predecessors, (400), 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) [2023-11-17 15:10:53,652 INFO L175 Difference]: Start difference. First operand has 23 places, 16 transitions, 72 flow. Second operand 3 states and 126 transitions. [2023-11-17 15:10:53,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 17 transitions, 102 flow [2023-11-17 15:10:53,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 17 transitions, 100 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 15:10:53,654 INFO L231 Difference]: Finished difference. Result has 23 places, 15 transitions, 70 flow [2023-11-17 15:10:53,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=70, PETRI_PLACES=23, PETRI_TRANSITIONS=15} [2023-11-17 15:10:53,657 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 4 predicate places. [2023-11-17 15:10:53,658 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 15 transitions, 70 flow [2023-11-17 15:10:53,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 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) [2023-11-17 15:10:53,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:10:53,659 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-17 15:10:53,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-17 15:10:53,660 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-17 15:10:53,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:10:53,660 INFO L85 PathProgramCache]: Analyzing trace with hash -680166957, now seen corresponding path program 1 times [2023-11-17 15:10:53,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:10:53,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723508352] [2023-11-17 15:10:53,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:10:53,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:10:53,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:10:53,677 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:10:53,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:10:53,693 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:10:53,693 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:10:53,695 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-11-17 15:10:53,695 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-11-17 15:10:53,695 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-11-17 15:10:53,696 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-11-17 15:10:53,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-17 15:10:53,696 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-11-17 15:10:53,696 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:10:53,697 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-17 15:10:53,710 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:10:53,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 70 places, 67 transitions, 152 flow [2023-11-17 15:10:53,723 INFO L124 PetriNetUnfolderBase]: 7/104 cut-off events. [2023-11-17 15:10:53,724 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-17 15:10:53,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117 conditions, 104 events. 7/104 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 177 event pairs, 0 based on Foata normal form. 0/90 useless extension candidates. Maximal degree in co-relation 82. Up to 8 conditions per place. [2023-11-17 15:10:53,724 INFO L82 GeneralOperation]: Start removeDead. Operand has 70 places, 67 transitions, 152 flow [2023-11-17 15:10:53,725 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 70 places, 67 transitions, 152 flow [2023-11-17 15:10:53,725 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:10:53,725 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 70 places, 67 transitions, 152 flow [2023-11-17 15:10:53,726 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 70 places, 67 transitions, 152 flow [2023-11-17 15:10:53,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 70 places, 67 transitions, 152 flow [2023-11-17 15:10:53,735 INFO L124 PetriNetUnfolderBase]: 7/104 cut-off events. [2023-11-17 15:10:53,735 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-17 15:10:53,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117 conditions, 104 events. 7/104 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 177 event pairs, 0 based on Foata normal form. 0/90 useless extension candidates. Maximal degree in co-relation 82. Up to 8 conditions per place. [2023-11-17 15:10:53,737 INFO L119 LiptonReduction]: Number of co-enabled transitions 1944 [2023-11-17 15:10:54,821 INFO L134 LiptonReduction]: Checked pairs total: 2821 [2023-11-17 15:10:54,822 INFO L136 LiptonReduction]: Total number of compositions: 57 [2023-11-17 15:10:54,824 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:10:54,824 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=LoopHeads, 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;@7144ba59, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:10:54,824 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-17 15:10:54,826 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:10:54,826 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2023-11-17 15:10:54,826 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:10:54,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:10:54,826 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-17 15:10:54,826 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 15:10:54,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:10:54,827 INFO L85 PathProgramCache]: Analyzing trace with hash 418346696, now seen corresponding path program 1 times [2023-11-17 15:10:54,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:10:54,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875719074] [2023-11-17 15:10:54,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:10:54,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:10:54,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:10:54,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:10:54,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:10:54,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875719074] [2023-11-17 15:10:54,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875719074] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:10:54,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:10:54,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:10:54,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827927184] [2023-11-17 15:10:54,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:10:54,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:10:54,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:10:54,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:10:54,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:10:54,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 124 [2023-11-17 15:10:54,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 19 transitions, 56 flow. Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 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) [2023-11-17 15:10:54,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:10:54,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 124 [2023-11-17 15:10:54,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:10:54,961 INFO L124 PetriNetUnfolderBase]: 370/649 cut-off events. [2023-11-17 15:10:54,961 INFO L125 PetriNetUnfolderBase]: For 169/169 co-relation queries the response was YES. [2023-11-17 15:10:54,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1355 conditions, 649 events. 370/649 cut-off events. For 169/169 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 3527 event pairs, 180 based on Foata normal form. 0/500 useless extension candidates. Maximal degree in co-relation 328. Up to 363 conditions per place. [2023-11-17 15:10:54,967 INFO L140 encePairwiseOnDemand]: 117/124 looper letters, 20 selfloop transitions, 4 changer transitions 0/27 dead transitions. [2023-11-17 15:10:54,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 27 transitions, 132 flow [2023-11-17 15:10:54,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:10:54,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:10:54,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 167 transitions. [2023-11-17 15:10:54,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4489247311827957 [2023-11-17 15:10:54,968 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 167 transitions. [2023-11-17 15:10:54,968 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 167 transitions. [2023-11-17 15:10:54,969 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:10:54,969 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 167 transitions. [2023-11-17 15:10:54,969 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 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) [2023-11-17 15:10:54,970 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 124.0) internal successors, (496), 4 states have internal predecessors, (496), 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) [2023-11-17 15:10:54,971 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 124.0) internal successors, (496), 4 states have internal predecessors, (496), 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) [2023-11-17 15:10:54,971 INFO L175 Difference]: Start difference. First operand has 25 places, 19 transitions, 56 flow. Second operand 3 states and 167 transitions. [2023-11-17 15:10:54,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 27 transitions, 132 flow [2023-11-17 15:10:54,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 27 transitions, 128 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-11-17 15:10:54,972 INFO L231 Difference]: Finished difference. Result has 28 places, 20 transitions, 80 flow [2023-11-17 15:10:54,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=28, PETRI_TRANSITIONS=20} [2023-11-17 15:10:54,973 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 3 predicate places. [2023-11-17 15:10:54,973 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 20 transitions, 80 flow [2023-11-17 15:10:54,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 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) [2023-11-17 15:10:54,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:10:54,974 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:10:54,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-17 15:10:54,974 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 15:10:54,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:10:54,974 INFO L85 PathProgramCache]: Analyzing trace with hash -210096513, now seen corresponding path program 1 times [2023-11-17 15:10:54,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:10:54,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653997818] [2023-11-17 15:10:54,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:10:54,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:10:54,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:10:54,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 15:10:54,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:10:54,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653997818] [2023-11-17 15:10:54,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653997818] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:10:54,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:10:54,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:10:54,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646033628] [2023-11-17 15:10:54,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:10:54,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:10:54,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:10:54,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:10:54,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:10:54,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 124 [2023-11-17 15:10:54,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 20 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 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) [2023-11-17 15:10:54,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:10:54,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 124 [2023-11-17 15:10:54,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:10:55,095 INFO L124 PetriNetUnfolderBase]: 432/765 cut-off events. [2023-11-17 15:10:55,095 INFO L125 PetriNetUnfolderBase]: For 472/472 co-relation queries the response was YES. [2023-11-17 15:10:55,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1987 conditions, 765 events. 432/765 cut-off events. For 472/472 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 4417 event pairs, 182 based on Foata normal form. 0/647 useless extension candidates. Maximal degree in co-relation 936. Up to 429 conditions per place. [2023-11-17 15:10:55,102 INFO L140 encePairwiseOnDemand]: 119/124 looper letters, 22 selfloop transitions, 6 changer transitions 0/31 dead transitions. [2023-11-17 15:10:55,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 31 transitions, 181 flow [2023-11-17 15:10:55,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:10:55,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:10:55,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 162 transitions. [2023-11-17 15:10:55,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43548387096774194 [2023-11-17 15:10:55,104 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 162 transitions. [2023-11-17 15:10:55,104 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 162 transitions. [2023-11-17 15:10:55,104 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:10:55,104 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 162 transitions. [2023-11-17 15:10:55,105 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 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) [2023-11-17 15:10:55,105 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 124.0) internal successors, (496), 4 states have internal predecessors, (496), 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) [2023-11-17 15:10:55,106 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 124.0) internal successors, (496), 4 states have internal predecessors, (496), 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) [2023-11-17 15:10:55,106 INFO L175 Difference]: Start difference. First operand has 28 places, 20 transitions, 80 flow. Second operand 3 states and 162 transitions. [2023-11-17 15:10:55,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 31 transitions, 181 flow [2023-11-17 15:10:55,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 31 transitions, 167 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-17 15:10:55,109 INFO L231 Difference]: Finished difference. Result has 30 places, 24 transitions, 120 flow [2023-11-17 15:10:55,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=120, PETRI_PLACES=30, PETRI_TRANSITIONS=24} [2023-11-17 15:10:55,109 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 5 predicate places. [2023-11-17 15:10:55,110 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 24 transitions, 120 flow [2023-11-17 15:10:55,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 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) [2023-11-17 15:10:55,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:10:55,110 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:10:55,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-17 15:10:55,110 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 15:10:55,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:10:55,110 INFO L85 PathProgramCache]: Analyzing trace with hash 2078442150, now seen corresponding path program 1 times [2023-11-17 15:10:55,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:10:55,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310500634] [2023-11-17 15:10:55,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:10:55,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:10:55,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:10:55,141 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 15:10:55,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:10:55,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310500634] [2023-11-17 15:10:55,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310500634] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:10:55,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:10:55,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 15:10:55,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325568135] [2023-11-17 15:10:55,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:10:55,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 15:10:55,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:10:55,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 15:10:55,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 15:10:55,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 124 [2023-11-17 15:10:55,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 120 flow. Second operand has 4 states, 4 states have (on average 47.75) internal successors, (191), 4 states have internal predecessors, (191), 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) [2023-11-17 15:10:55,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:10:55,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 124 [2023-11-17 15:10:55,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:10:55,233 INFO L124 PetriNetUnfolderBase]: 352/619 cut-off events. [2023-11-17 15:10:55,234 INFO L125 PetriNetUnfolderBase]: For 565/565 co-relation queries the response was YES. [2023-11-17 15:10:55,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1884 conditions, 619 events. 352/619 cut-off events. For 565/565 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 3538 event pairs, 64 based on Foata normal form. 0/557 useless extension candidates. Maximal degree in co-relation 1828. Up to 512 conditions per place. [2023-11-17 15:10:55,239 INFO L140 encePairwiseOnDemand]: 122/124 looper letters, 28 selfloop transitions, 2 changer transitions 0/33 dead transitions. [2023-11-17 15:10:55,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 33 transitions, 226 flow [2023-11-17 15:10:55,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:10:55,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:10:55,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 161 transitions. [2023-11-17 15:10:55,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4327956989247312 [2023-11-17 15:10:55,241 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 161 transitions. [2023-11-17 15:10:55,241 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 161 transitions. [2023-11-17 15:10:55,241 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:10:55,241 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 161 transitions. [2023-11-17 15:10:55,241 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 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) [2023-11-17 15:10:55,242 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 124.0) internal successors, (496), 4 states have internal predecessors, (496), 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) [2023-11-17 15:10:55,242 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 124.0) internal successors, (496), 4 states have internal predecessors, (496), 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) [2023-11-17 15:10:55,242 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 120 flow. Second operand 3 states and 161 transitions. [2023-11-17 15:10:55,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 33 transitions, 226 flow [2023-11-17 15:10:55,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 33 transitions, 208 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-17 15:10:55,245 INFO L231 Difference]: Finished difference. Result has 29 places, 23 transitions, 108 flow [2023-11-17 15:10:55,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=29, PETRI_TRANSITIONS=23} [2023-11-17 15:10:55,246 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 4 predicate places. [2023-11-17 15:10:55,246 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 23 transitions, 108 flow [2023-11-17 15:10:55,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.75) internal successors, (191), 4 states have internal predecessors, (191), 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) [2023-11-17 15:10:55,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:10:55,247 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:10:55,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-17 15:10:55,247 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 15:10:55,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:10:55,247 INFO L85 PathProgramCache]: Analyzing trace with hash 2076944862, now seen corresponding path program 1 times [2023-11-17 15:10:55,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:10:55,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520047534] [2023-11-17 15:10:55,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:10:55,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:10:55,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:10:55,284 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 15:10:55,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:10:55,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520047534] [2023-11-17 15:10:55,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520047534] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:10:55,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:10:55,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 15:10:55,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14061805] [2023-11-17 15:10:55,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:10:55,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 15:10:55,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:10:55,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 15:10:55,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 15:10:55,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 124 [2023-11-17 15:10:55,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 23 transitions, 108 flow. Second operand has 4 states, 4 states have (on average 47.75) internal successors, (191), 4 states have internal predecessors, (191), 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) [2023-11-17 15:10:55,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:10:55,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 124 [2023-11-17 15:10:55,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:10:55,364 INFO L124 PetriNetUnfolderBase]: 285/518 cut-off events. [2023-11-17 15:10:55,364 INFO L125 PetriNetUnfolderBase]: For 401/401 co-relation queries the response was YES. [2023-11-17 15:10:55,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1524 conditions, 518 events. 285/518 cut-off events. For 401/401 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 2881 event pairs, 51 based on Foata normal form. 0/466 useless extension candidates. Maximal degree in co-relation 776. Up to 412 conditions per place. [2023-11-17 15:10:55,368 INFO L140 encePairwiseOnDemand]: 122/124 looper letters, 25 selfloop transitions, 2 changer transitions 0/30 dead transitions. [2023-11-17 15:10:55,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 30 transitions, 193 flow [2023-11-17 15:10:55,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:10:55,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:10:55,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 158 transitions. [2023-11-17 15:10:55,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42473118279569894 [2023-11-17 15:10:55,369 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 158 transitions. [2023-11-17 15:10:55,369 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 158 transitions. [2023-11-17 15:10:55,369 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:10:55,370 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 158 transitions. [2023-11-17 15:10:55,370 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 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) [2023-11-17 15:10:55,371 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 124.0) internal successors, (496), 4 states have internal predecessors, (496), 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) [2023-11-17 15:10:55,371 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 124.0) internal successors, (496), 4 states have internal predecessors, (496), 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) [2023-11-17 15:10:55,371 INFO L175 Difference]: Start difference. First operand has 29 places, 23 transitions, 108 flow. Second operand 3 states and 158 transitions. [2023-11-17 15:10:55,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 30 transitions, 193 flow [2023-11-17 15:10:55,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 30 transitions, 190 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 15:10:55,373 INFO L231 Difference]: Finished difference. Result has 29 places, 22 transitions, 106 flow [2023-11-17 15:10:55,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=29, PETRI_TRANSITIONS=22} [2023-11-17 15:10:55,374 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 4 predicate places. [2023-11-17 15:10:55,374 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 22 transitions, 106 flow [2023-11-17 15:10:55,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.75) internal successors, (191), 4 states have internal predecessors, (191), 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) [2023-11-17 15:10:55,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:10:55,375 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-17 15:10:55,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-17 15:10:55,375 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 15:10:55,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:10:55,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1848546632, now seen corresponding path program 1 times [2023-11-17 15:10:55,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:10:55,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352823684] [2023-11-17 15:10:55,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:10:55,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:10:55,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:10:55,433 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-17 15:10:55,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:10:55,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352823684] [2023-11-17 15:10:55,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352823684] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:10:55,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:10:55,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:10:55,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624997995] [2023-11-17 15:10:55,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:10:55,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:10:55,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:10:55,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:10:55,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:10:55,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 124 [2023-11-17 15:10:55,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 22 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 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) [2023-11-17 15:10:55,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:10:55,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 124 [2023-11-17 15:10:55,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:10:55,527 INFO L124 PetriNetUnfolderBase]: 284/582 cut-off events. [2023-11-17 15:10:55,528 INFO L125 PetriNetUnfolderBase]: For 518/518 co-relation queries the response was YES. [2023-11-17 15:10:55,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1671 conditions, 582 events. 284/582 cut-off events. For 518/518 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 3498 event pairs, 140 based on Foata normal form. 0/548 useless extension candidates. Maximal degree in co-relation 888. Up to 341 conditions per place. [2023-11-17 15:10:55,532 INFO L140 encePairwiseOnDemand]: 119/124 looper letters, 20 selfloop transitions, 9 changer transitions 0/32 dead transitions. [2023-11-17 15:10:55,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 32 transitions, 214 flow [2023-11-17 15:10:55,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:10:55,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:10:55,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 157 transitions. [2023-11-17 15:10:55,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4220430107526882 [2023-11-17 15:10:55,533 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 157 transitions. [2023-11-17 15:10:55,533 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 157 transitions. [2023-11-17 15:10:55,533 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:10:55,534 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 157 transitions. [2023-11-17 15:10:55,534 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 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) [2023-11-17 15:10:55,535 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 124.0) internal successors, (496), 4 states have internal predecessors, (496), 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) [2023-11-17 15:10:55,535 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 124.0) internal successors, (496), 4 states have internal predecessors, (496), 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) [2023-11-17 15:10:55,535 INFO L175 Difference]: Start difference. First operand has 29 places, 22 transitions, 106 flow. Second operand 3 states and 157 transitions. [2023-11-17 15:10:55,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 32 transitions, 214 flow [2023-11-17 15:10:55,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 32 transitions, 210 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 15:10:55,536 INFO L231 Difference]: Finished difference. Result has 32 places, 27 transitions, 182 flow [2023-11-17 15:10:55,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=182, PETRI_PLACES=32, PETRI_TRANSITIONS=27} [2023-11-17 15:10:55,538 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 7 predicate places. [2023-11-17 15:10:55,538 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 27 transitions, 182 flow [2023-11-17 15:10:55,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 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) [2023-11-17 15:10:55,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:10:55,538 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:10:55,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-17 15:10:55,539 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 15:10:55,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:10:55,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1470367851, now seen corresponding path program 1 times [2023-11-17 15:10:55,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:10:55,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406362712] [2023-11-17 15:10:55,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:10:55,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:10:55,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:10:55,590 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-17 15:10:55,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:10:55,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406362712] [2023-11-17 15:10:55,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406362712] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:10:55,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:10:55,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 15:10:55,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195375174] [2023-11-17 15:10:55,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:10:55,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 15:10:55,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:10:55,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 15:10:55,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 15:10:55,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 124 [2023-11-17 15:10:55,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 27 transitions, 182 flow. Second operand has 4 states, 4 states have (on average 48.0) internal successors, (192), 4 states have internal predecessors, (192), 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) [2023-11-17 15:10:55,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:10:55,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 124 [2023-11-17 15:10:55,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:10:55,664 INFO L124 PetriNetUnfolderBase]: 237/505 cut-off events. [2023-11-17 15:10:55,665 INFO L125 PetriNetUnfolderBase]: For 811/811 co-relation queries the response was YES. [2023-11-17 15:10:55,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1740 conditions, 505 events. 237/505 cut-off events. For 811/811 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 3012 event pairs, 79 based on Foata normal form. 30/531 useless extension candidates. Maximal degree in co-relation 908. Up to 316 conditions per place. [2023-11-17 15:10:55,669 INFO L140 encePairwiseOnDemand]: 122/124 looper letters, 26 selfloop transitions, 4 changer transitions 0/33 dead transitions. [2023-11-17 15:10:55,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 33 transitions, 274 flow [2023-11-17 15:10:55,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:10:55,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:10:55,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 155 transitions. [2023-11-17 15:10:55,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2023-11-17 15:10:55,670 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 155 transitions. [2023-11-17 15:10:55,670 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 155 transitions. [2023-11-17 15:10:55,670 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:10:55,670 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 155 transitions. [2023-11-17 15:10:55,671 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 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) [2023-11-17 15:10:55,672 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 124.0) internal successors, (496), 4 states have internal predecessors, (496), 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) [2023-11-17 15:10:55,672 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 124.0) internal successors, (496), 4 states have internal predecessors, (496), 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) [2023-11-17 15:10:55,672 INFO L175 Difference]: Start difference. First operand has 32 places, 27 transitions, 182 flow. Second operand 3 states and 155 transitions. [2023-11-17 15:10:55,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 33 transitions, 274 flow [2023-11-17 15:10:55,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 33 transitions, 256 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-17 15:10:55,674 INFO L231 Difference]: Finished difference. Result has 31 places, 26 transitions, 168 flow [2023-11-17 15:10:55,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=168, PETRI_PLACES=31, PETRI_TRANSITIONS=26} [2023-11-17 15:10:55,675 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 6 predicate places. [2023-11-17 15:10:55,675 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 26 transitions, 168 flow [2023-11-17 15:10:55,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 48.0) internal successors, (192), 4 states have internal predecessors, (192), 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) [2023-11-17 15:10:55,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:10:55,675 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-11-17 15:10:55,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-17 15:10:55,676 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 15:10:55,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:10:55,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1660398709, now seen corresponding path program 1 times [2023-11-17 15:10:55,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:10:55,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332473375] [2023-11-17 15:10:55,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:10:55,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:10:55,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:10:55,686 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:10:55,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:10:55,694 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:10:55,694 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:10:55,694 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-17 15:10:55,694 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-17 15:10:55,694 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-17 15:10:55,695 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-17 15:10:55,695 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-17 15:10:55,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-17 15:10:55,695 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:10:55,695 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:10:55,695 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-17 15:10:55,710 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:10:55,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 84 places, 80 transitions, 188 flow [2023-11-17 15:10:55,721 INFO L124 PetriNetUnfolderBase]: 9/130 cut-off events. [2023-11-17 15:10:55,721 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-17 15:10:55,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149 conditions, 130 events. 9/130 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 234 event pairs, 0 based on Foata normal form. 0/112 useless extension candidates. Maximal degree in co-relation 112. Up to 10 conditions per place. [2023-11-17 15:10:55,722 INFO L82 GeneralOperation]: Start removeDead. Operand has 84 places, 80 transitions, 188 flow [2023-11-17 15:10:55,723 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 84 places, 80 transitions, 188 flow [2023-11-17 15:10:55,723 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:10:55,723 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 84 places, 80 transitions, 188 flow [2023-11-17 15:10:55,723 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 84 places, 80 transitions, 188 flow [2023-11-17 15:10:55,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 84 places, 80 transitions, 188 flow [2023-11-17 15:10:55,731 INFO L124 PetriNetUnfolderBase]: 9/130 cut-off events. [2023-11-17 15:10:55,732 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-17 15:10:55,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149 conditions, 130 events. 9/130 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 234 event pairs, 0 based on Foata normal form. 0/112 useless extension candidates. Maximal degree in co-relation 112. Up to 10 conditions per place. [2023-11-17 15:10:55,734 INFO L119 LiptonReduction]: Number of co-enabled transitions 3216 [2023-11-17 15:10:57,012 INFO L134 LiptonReduction]: Checked pairs total: 5316 [2023-11-17 15:10:57,012 INFO L136 LiptonReduction]: Total number of compositions: 68 [2023-11-17 15:10:57,014 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:10:57,015 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=LoopHeads, 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;@7144ba59, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:10:57,015 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-17 15:10:57,016 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:10:57,016 INFO L124 PetriNetUnfolderBase]: 1/9 cut-off events. [2023-11-17 15:10:57,016 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:10:57,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:10:57,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-17 15:10:57,017 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 15:10:57,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:10:57,017 INFO L85 PathProgramCache]: Analyzing trace with hash 571859155, now seen corresponding path program 1 times [2023-11-17 15:10:57,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:10:57,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91711063] [2023-11-17 15:10:57,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:10:57,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:10:57,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:10:57,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:10:57,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:10:57,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91711063] [2023-11-17 15:10:57,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91711063] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:10:57,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:10:57,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:10:57,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166760203] [2023-11-17 15:10:57,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:10:57,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:10:57,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:10:57,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:10:57,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:10:57,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 148 [2023-11-17 15:10:57,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 24 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 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) [2023-11-17 15:10:57,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:10:57,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 148 [2023-11-17 15:10:57,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:10:57,332 INFO L124 PetriNetUnfolderBase]: 2300/3511 cut-off events. [2023-11-17 15:10:57,332 INFO L125 PetriNetUnfolderBase]: For 1374/1374 co-relation queries the response was YES. [2023-11-17 15:10:57,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7375 conditions, 3511 events. 2300/3511 cut-off events. For 1374/1374 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 20780 event pairs, 1224 based on Foata normal form. 0/2644 useless extension candidates. Maximal degree in co-relation 1366. Up to 2129 conditions per place. [2023-11-17 15:10:57,358 INFO L140 encePairwiseOnDemand]: 139/148 looper letters, 27 selfloop transitions, 5 changer transitions 0/35 dead transitions. [2023-11-17 15:10:57,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 35 transitions, 183 flow [2023-11-17 15:10:57,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:10:57,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:10:57,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 200 transitions. [2023-11-17 15:10:57,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45045045045045046 [2023-11-17 15:10:57,359 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 200 transitions. [2023-11-17 15:10:57,359 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 200 transitions. [2023-11-17 15:10:57,359 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:10:57,360 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 200 transitions. [2023-11-17 15:10:57,360 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 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) [2023-11-17 15:10:57,361 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 148.0) internal successors, (592), 4 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) [2023-11-17 15:10:57,361 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 148.0) internal successors, (592), 4 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) [2023-11-17 15:10:57,361 INFO L175 Difference]: Start difference. First operand has 31 places, 24 transitions, 76 flow. Second operand 3 states and 200 transitions. [2023-11-17 15:10:57,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 35 transitions, 183 flow [2023-11-17 15:10:57,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 35 transitions, 171 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-11-17 15:10:57,363 INFO L231 Difference]: Finished difference. Result has 34 places, 25 transitions, 102 flow [2023-11-17 15:10:57,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=34, PETRI_TRANSITIONS=25} [2023-11-17 15:10:57,364 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 3 predicate places. [2023-11-17 15:10:57,364 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 25 transitions, 102 flow [2023-11-17 15:10:57,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 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) [2023-11-17 15:10:57,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:10:57,364 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:10:57,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-17 15:10:57,364 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 15:10:57,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:10:57,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1556536886, now seen corresponding path program 1 times [2023-11-17 15:10:57,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:10:57,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289469204] [2023-11-17 15:10:57,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:10:57,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:10:57,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:10:57,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 15:10:57,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:10:57,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289469204] [2023-11-17 15:10:57,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289469204] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:10:57,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:10:57,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:10:57,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048621376] [2023-11-17 15:10:57,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:10:57,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:10:57,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:10:57,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:10:57,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:10:57,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 148 [2023-11-17 15:10:57,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 25 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 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) [2023-11-17 15:10:57,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:10:57,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 148 [2023-11-17 15:10:57,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:10:57,842 INFO L124 PetriNetUnfolderBase]: 3060/4717 cut-off events. [2023-11-17 15:10:57,842 INFO L125 PetriNetUnfolderBase]: For 3241/3241 co-relation queries the response was YES. [2023-11-17 15:10:57,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12043 conditions, 4717 events. 3060/4717 cut-off events. For 3241/3241 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 30226 event pairs, 1352 based on Foata normal form. 0/3849 useless extension candidates. Maximal degree in co-relation 5674. Up to 2885 conditions per place. [2023-11-17 15:10:57,886 INFO L140 encePairwiseOnDemand]: 142/148 looper letters, 30 selfloop transitions, 8 changer transitions 0/41 dead transitions. [2023-11-17 15:10:57,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 41 transitions, 244 flow [2023-11-17 15:10:57,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:10:57,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:10:57,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 194 transitions. [2023-11-17 15:10:57,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4369369369369369 [2023-11-17 15:10:57,887 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 194 transitions. [2023-11-17 15:10:57,887 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 194 transitions. [2023-11-17 15:10:57,888 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:10:57,888 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 194 transitions. [2023-11-17 15:10:57,890 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 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) [2023-11-17 15:10:57,890 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 148.0) internal successors, (592), 4 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) [2023-11-17 15:10:57,891 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 148.0) internal successors, (592), 4 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) [2023-11-17 15:10:57,891 INFO L175 Difference]: Start difference. First operand has 34 places, 25 transitions, 102 flow. Second operand 3 states and 194 transitions. [2023-11-17 15:10:57,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 41 transitions, 244 flow [2023-11-17 15:10:57,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 41 transitions, 226 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-17 15:10:57,901 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 160 flow [2023-11-17 15:10:57,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=160, PETRI_PLACES=36, PETRI_TRANSITIONS=31} [2023-11-17 15:10:57,902 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 5 predicate places. [2023-11-17 15:10:57,903 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 160 flow [2023-11-17 15:10:57,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 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) [2023-11-17 15:10:57,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:10:57,903 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:10:57,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-17 15:10:57,903 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 15:10:57,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:10:57,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1006092106, now seen corresponding path program 1 times [2023-11-17 15:10:57,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:10:57,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036982805] [2023-11-17 15:10:57,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:10:57,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:10:57,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:10:58,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 15:10:58,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:10:58,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036982805] [2023-11-17 15:10:58,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036982805] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:10:58,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:10:58,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 15:10:58,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136519241] [2023-11-17 15:10:58,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:10:58,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 15:10:58,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:10:58,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 15:10:58,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 15:10:58,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 148 [2023-11-17 15:10:58,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 31 transitions, 160 flow. Second operand has 4 states, 4 states have (on average 55.75) internal successors, (223), 4 states have internal predecessors, (223), 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) [2023-11-17 15:10:58,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:10:58,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 148 [2023-11-17 15:10:58,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:10:58,352 INFO L124 PetriNetUnfolderBase]: 2474/3707 cut-off events. [2023-11-17 15:10:58,352 INFO L125 PetriNetUnfolderBase]: For 3539/3539 co-relation queries the response was YES. [2023-11-17 15:10:58,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11138 conditions, 3707 events. 2474/3707 cut-off events. For 3539/3539 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 23003 event pairs, 472 based on Foata normal form. 0/3175 useless extension candidates. Maximal degree in co-relation 11063. Up to 3026 conditions per place. [2023-11-17 15:10:58,383 INFO L140 encePairwiseOnDemand]: 146/148 looper letters, 41 selfloop transitions, 2 changer transitions 0/46 dead transitions. [2023-11-17 15:10:58,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 46 transitions, 323 flow [2023-11-17 15:10:58,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:10:58,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:10:58,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 193 transitions. [2023-11-17 15:10:58,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4346846846846847 [2023-11-17 15:10:58,385 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 193 transitions. [2023-11-17 15:10:58,385 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 193 transitions. [2023-11-17 15:10:58,385 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:10:58,385 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 193 transitions. [2023-11-17 15:10:58,385 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 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) [2023-11-17 15:10:58,387 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 148.0) internal successors, (592), 4 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) [2023-11-17 15:10:58,388 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 148.0) internal successors, (592), 4 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) [2023-11-17 15:10:58,388 INFO L175 Difference]: Start difference. First operand has 36 places, 31 transitions, 160 flow. Second operand 3 states and 193 transitions. [2023-11-17 15:10:58,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 46 transitions, 323 flow [2023-11-17 15:10:58,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 46 transitions, 299 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-17 15:10:58,398 INFO L231 Difference]: Finished difference. Result has 35 places, 30 transitions, 144 flow [2023-11-17 15:10:58,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=144, PETRI_PLACES=35, PETRI_TRANSITIONS=30} [2023-11-17 15:10:58,399 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 4 predicate places. [2023-11-17 15:10:58,399 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 30 transitions, 144 flow [2023-11-17 15:10:58,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.75) internal successors, (223), 4 states have internal predecessors, (223), 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) [2023-11-17 15:10:58,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:10:58,399 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:10:58,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-17 15:10:58,399 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 15:10:58,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:10:58,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1008000454, now seen corresponding path program 1 times [2023-11-17 15:10:58,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:10:58,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706086234] [2023-11-17 15:10:58,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:10:58,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:10:58,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:10:58,440 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 15:10:58,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:10:58,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706086234] [2023-11-17 15:10:58,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706086234] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:10:58,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:10:58,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 15:10:58,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669464382] [2023-11-17 15:10:58,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:10:58,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 15:10:58,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:10:58,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 15:10:58,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 15:10:58,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 148 [2023-11-17 15:10:58,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 30 transitions, 144 flow. Second operand has 4 states, 4 states have (on average 55.75) internal successors, (223), 4 states have internal predecessors, (223), 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) [2023-11-17 15:10:58,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:10:58,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 148 [2023-11-17 15:10:58,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:10:58,683 INFO L124 PetriNetUnfolderBase]: 1993/3029 cut-off events. [2023-11-17 15:10:58,683 INFO L125 PetriNetUnfolderBase]: For 2412/2412 co-relation queries the response was YES. [2023-11-17 15:10:58,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8808 conditions, 3029 events. 1993/3029 cut-off events. For 2412/2412 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 18191 event pairs, 335 based on Foata normal form. 0/2587 useless extension candidates. Maximal degree in co-relation 4391. Up to 2450 conditions per place. [2023-11-17 15:10:58,706 INFO L140 encePairwiseOnDemand]: 146/148 looper letters, 38 selfloop transitions, 2 changer transitions 0/43 dead transitions. [2023-11-17 15:10:58,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 43 transitions, 284 flow [2023-11-17 15:10:58,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:10:58,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:10:58,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 190 transitions. [2023-11-17 15:10:58,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42792792792792794 [2023-11-17 15:10:58,708 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 190 transitions. [2023-11-17 15:10:58,708 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 190 transitions. [2023-11-17 15:10:58,708 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:10:58,708 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 190 transitions. [2023-11-17 15:10:58,709 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 63.333333333333336) internal successors, (190), 3 states have internal predecessors, (190), 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) [2023-11-17 15:10:58,710 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 148.0) internal successors, (592), 4 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) [2023-11-17 15:10:58,710 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 148.0) internal successors, (592), 4 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) [2023-11-17 15:10:58,711 INFO L175 Difference]: Start difference. First operand has 35 places, 30 transitions, 144 flow. Second operand 3 states and 190 transitions. [2023-11-17 15:10:58,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 43 transitions, 284 flow [2023-11-17 15:10:58,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 43 transitions, 281 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 15:10:58,713 INFO L231 Difference]: Finished difference. Result has 35 places, 29 transitions, 142 flow [2023-11-17 15:10:58,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=35, PETRI_TRANSITIONS=29} [2023-11-17 15:10:58,714 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 4 predicate places. [2023-11-17 15:10:58,714 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 29 transitions, 142 flow [2023-11-17 15:10:58,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.75) internal successors, (223), 4 states have internal predecessors, (223), 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) [2023-11-17 15:10:58,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:10:58,714 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-17 15:10:58,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-17 15:10:58,715 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 15:10:58,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:10:58,715 INFO L85 PathProgramCache]: Analyzing trace with hash 2011761959, now seen corresponding path program 1 times [2023-11-17 15:10:58,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:10:58,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517851708] [2023-11-17 15:10:58,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:10:58,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:10:58,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:10:58,737 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-17 15:10:58,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:10:58,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517851708] [2023-11-17 15:10:58,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517851708] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:10:58,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:10:58,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:10:58,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366903226] [2023-11-17 15:10:58,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:10:58,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:10:58,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:10:58,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:10:58,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:10:58,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 148 [2023-11-17 15:10:58,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 29 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 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) [2023-11-17 15:10:58,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:10:58,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 148 [2023-11-17 15:10:58,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:10:59,041 INFO L124 PetriNetUnfolderBase]: 2430/3913 cut-off events. [2023-11-17 15:10:59,042 INFO L125 PetriNetUnfolderBase]: For 3913/3913 co-relation queries the response was YES. [2023-11-17 15:10:59,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11222 conditions, 3913 events. 2430/3913 cut-off events. For 3913/3913 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 25962 event pairs, 988 based on Foata normal form. 0/3424 useless extension candidates. Maximal degree in co-relation 6516. Up to 2459 conditions per place. [2023-11-17 15:10:59,067 INFO L140 encePairwiseOnDemand]: 142/148 looper letters, 30 selfloop transitions, 13 changer transitions 0/46 dead transitions. [2023-11-17 15:10:59,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 46 transitions, 313 flow [2023-11-17 15:10:59,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:10:59,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:10:59,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 189 transitions. [2023-11-17 15:10:59,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42567567567567566 [2023-11-17 15:10:59,068 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 189 transitions. [2023-11-17 15:10:59,068 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 189 transitions. [2023-11-17 15:10:59,069 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:10:59,069 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 189 transitions. [2023-11-17 15:10:59,069 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 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) [2023-11-17 15:10:59,070 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 148.0) internal successors, (592), 4 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) [2023-11-17 15:10:59,070 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 148.0) internal successors, (592), 4 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) [2023-11-17 15:10:59,070 INFO L175 Difference]: Start difference. First operand has 35 places, 29 transitions, 142 flow. Second operand 3 states and 189 transitions. [2023-11-17 15:10:59,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 46 transitions, 313 flow [2023-11-17 15:10:59,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 46 transitions, 309 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 15:10:59,074 INFO L231 Difference]: Finished difference. Result has 38 places, 38 transitions, 266 flow [2023-11-17 15:10:59,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=266, PETRI_PLACES=38, PETRI_TRANSITIONS=38} [2023-11-17 15:10:59,074 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 7 predicate places. [2023-11-17 15:10:59,074 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 38 transitions, 266 flow [2023-11-17 15:10:59,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 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) [2023-11-17 15:10:59,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:10:59,074 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:10:59,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-17 15:10:59,075 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 15:10:59,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:10:59,075 INFO L85 PathProgramCache]: Analyzing trace with hash -2059884875, now seen corresponding path program 1 times [2023-11-17 15:10:59,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:10:59,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10973168] [2023-11-17 15:10:59,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:10:59,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:10:59,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:10:59,123 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-17 15:10:59,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:10:59,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10973168] [2023-11-17 15:10:59,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10973168] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:10:59,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:10:59,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 15:10:59,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316321426] [2023-11-17 15:10:59,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:10:59,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 15:10:59,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:10:59,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 15:10:59,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 15:10:59,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 148 [2023-11-17 15:10:59,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 38 transitions, 266 flow. Second operand has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 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) [2023-11-17 15:10:59,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:10:59,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 148 [2023-11-17 15:10:59,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:10:59,412 INFO L124 PetriNetUnfolderBase]: 1955/3099 cut-off events. [2023-11-17 15:10:59,412 INFO L125 PetriNetUnfolderBase]: For 5227/5227 co-relation queries the response was YES. [2023-11-17 15:10:59,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11087 conditions, 3099 events. 1955/3099 cut-off events. For 5227/5227 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 19775 event pairs, 409 based on Foata normal form. 204/3066 useless extension candidates. Maximal degree in co-relation 6123. Up to 2442 conditions per place. [2023-11-17 15:10:59,436 INFO L140 encePairwiseOnDemand]: 146/148 looper letters, 45 selfloop transitions, 4 changer transitions 0/52 dead transitions. [2023-11-17 15:10:59,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 52 transitions, 449 flow [2023-11-17 15:10:59,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:10:59,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:10:59,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 187 transitions. [2023-11-17 15:10:59,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42117117117117114 [2023-11-17 15:10:59,438 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 187 transitions. [2023-11-17 15:10:59,438 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 187 transitions. [2023-11-17 15:10:59,438 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:10:59,438 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 187 transitions. [2023-11-17 15:10:59,439 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 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) [2023-11-17 15:10:59,440 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 148.0) internal successors, (592), 4 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) [2023-11-17 15:10:59,440 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 148.0) internal successors, (592), 4 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) [2023-11-17 15:10:59,440 INFO L175 Difference]: Start difference. First operand has 38 places, 38 transitions, 266 flow. Second operand 3 states and 187 transitions. [2023-11-17 15:10:59,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 52 transitions, 449 flow [2023-11-17 15:10:59,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 52 transitions, 423 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-17 15:10:59,447 INFO L231 Difference]: Finished difference. Result has 37 places, 37 transitions, 244 flow [2023-11-17 15:10:59,447 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=244, PETRI_PLACES=37, PETRI_TRANSITIONS=37} [2023-11-17 15:10:59,447 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 6 predicate places. [2023-11-17 15:10:59,448 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 37 transitions, 244 flow [2023-11-17 15:10:59,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 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) [2023-11-17 15:10:59,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:10:59,448 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:10:59,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-11-17 15:10:59,448 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 15:10:59,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:10:59,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1262295165, now seen corresponding path program 1 times [2023-11-17 15:10:59,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:10:59,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25594616] [2023-11-17 15:10:59,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:10:59,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:10:59,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:10:59,474 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-17 15:10:59,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:10:59,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25594616] [2023-11-17 15:10:59,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25594616] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:10:59,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:10:59,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:10:59,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921867346] [2023-11-17 15:10:59,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:10:59,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:10:59,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:10:59,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:10:59,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:10:59,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 148 [2023-11-17 15:10:59,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 37 transitions, 244 flow. Second operand has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 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) [2023-11-17 15:10:59,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:10:59,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 148 [2023-11-17 15:10:59,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:10:59,791 INFO L124 PetriNetUnfolderBase]: 2132/3676 cut-off events. [2023-11-17 15:10:59,791 INFO L125 PetriNetUnfolderBase]: For 5945/5945 co-relation queries the response was YES. [2023-11-17 15:10:59,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12053 conditions, 3676 events. 2132/3676 cut-off events. For 5945/5945 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 26022 event pairs, 890 based on Foata normal form. 0/3493 useless extension candidates. Maximal degree in co-relation 6009. Up to 2397 conditions per place. [2023-11-17 15:10:59,825 INFO L140 encePairwiseOnDemand]: 142/148 looper letters, 33 selfloop transitions, 21 changer transitions 0/57 dead transitions. [2023-11-17 15:10:59,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 57 transitions, 492 flow [2023-11-17 15:10:59,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:10:59,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:10:59,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 186 transitions. [2023-11-17 15:10:59,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4189189189189189 [2023-11-17 15:10:59,827 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 186 transitions. [2023-11-17 15:10:59,827 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 186 transitions. [2023-11-17 15:10:59,827 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:10:59,827 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 186 transitions. [2023-11-17 15:10:59,828 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 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) [2023-11-17 15:10:59,829 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 148.0) internal successors, (592), 4 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) [2023-11-17 15:10:59,829 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 148.0) internal successors, (592), 4 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) [2023-11-17 15:10:59,829 INFO L175 Difference]: Start difference. First operand has 37 places, 37 transitions, 244 flow. Second operand 3 states and 186 transitions. [2023-11-17 15:10:59,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 57 transitions, 492 flow [2023-11-17 15:10:59,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 57 transitions, 484 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 15:10:59,835 INFO L231 Difference]: Finished difference. Result has 40 places, 50 transitions, 462 flow [2023-11-17 15:10:59,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=462, PETRI_PLACES=40, PETRI_TRANSITIONS=50} [2023-11-17 15:10:59,836 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 9 predicate places. [2023-11-17 15:10:59,836 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 50 transitions, 462 flow [2023-11-17 15:10:59,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 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) [2023-11-17 15:10:59,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:10:59,836 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:10:59,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-11-17 15:10:59,836 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 15:10:59,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:10:59,837 INFO L85 PathProgramCache]: Analyzing trace with hash 476447896, now seen corresponding path program 1 times [2023-11-17 15:10:59,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:10:59,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219150071] [2023-11-17 15:10:59,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:10:59,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:10:59,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:10:59,873 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-17 15:10:59,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:10:59,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219150071] [2023-11-17 15:10:59,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219150071] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:10:59,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:10:59,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 15:10:59,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522537155] [2023-11-17 15:10:59,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:10:59,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 15:10:59,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:10:59,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 15:10:59,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 15:10:59,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 148 [2023-11-17 15:10:59,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 50 transitions, 462 flow. Second operand has 4 states, 4 states have (on average 56.25) internal successors, (225), 4 states have internal predecessors, (225), 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) [2023-11-17 15:10:59,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:10:59,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 148 [2023-11-17 15:10:59,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:11:00,146 INFO L124 PetriNetUnfolderBase]: 1771/3145 cut-off events. [2023-11-17 15:11:00,147 INFO L125 PetriNetUnfolderBase]: For 8201/8201 co-relation queries the response was YES. [2023-11-17 15:11:00,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12124 conditions, 3145 events. 1771/3145 cut-off events. For 8201/8201 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 22259 event pairs, 569 based on Foata normal form. 170/3302 useless extension candidates. Maximal degree in co-relation 6035. Up to 1944 conditions per place. [2023-11-17 15:11:00,174 INFO L140 encePairwiseOnDemand]: 146/148 looper letters, 54 selfloop transitions, 8 changer transitions 0/65 dead transitions. [2023-11-17 15:11:00,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 65 transitions, 707 flow [2023-11-17 15:11:00,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:11:00,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:11:00,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 184 transitions. [2023-11-17 15:11:00,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4144144144144144 [2023-11-17 15:11:00,176 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 184 transitions. [2023-11-17 15:11:00,176 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 184 transitions. [2023-11-17 15:11:00,176 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:11:00,176 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 184 transitions. [2023-11-17 15:11:00,177 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 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) [2023-11-17 15:11:00,177 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 148.0) internal successors, (592), 4 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) [2023-11-17 15:11:00,177 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 148.0) internal successors, (592), 4 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) [2023-11-17 15:11:00,178 INFO L175 Difference]: Start difference. First operand has 40 places, 50 transitions, 462 flow. Second operand 3 states and 184 transitions. [2023-11-17 15:11:00,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 65 transitions, 707 flow [2023-11-17 15:11:00,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 65 transitions, 665 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-17 15:11:00,190 INFO L231 Difference]: Finished difference. Result has 39 places, 49 transitions, 432 flow [2023-11-17 15:11:00,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=416, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=432, PETRI_PLACES=39, PETRI_TRANSITIONS=49} [2023-11-17 15:11:00,190 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 8 predicate places. [2023-11-17 15:11:00,190 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 49 transitions, 432 flow [2023-11-17 15:11:00,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.25) internal successors, (225), 4 states have internal predecessors, (225), 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) [2023-11-17 15:11:00,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:11:00,191 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-11-17 15:11:00,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-11-17 15:11:00,191 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 15:11:00,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:11:00,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1881435901, now seen corresponding path program 1 times [2023-11-17 15:11:00,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:11:00,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078175632] [2023-11-17 15:11:00,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:11:00,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:11:00,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:11:00,203 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:11:00,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:11:00,215 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:11:00,215 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:11:00,215 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-11-17 15:11:00,215 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-11-17 15:11:00,215 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-11-17 15:11:00,215 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-11-17 15:11:00,215 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-11-17 15:11:00,216 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-11-17 15:11:00,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-11-17 15:11:00,216 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:11:00,216 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:11:00,216 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-11-17 15:11:00,236 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:11:00,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 98 places, 93 transitions, 226 flow [2023-11-17 15:11:00,250 INFO L124 PetriNetUnfolderBase]: 11/156 cut-off events. [2023-11-17 15:11:00,250 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-17 15:11:00,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182 conditions, 156 events. 11/156 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 298 event pairs, 0 based on Foata normal form. 0/134 useless extension candidates. Maximal degree in co-relation 143. Up to 12 conditions per place. [2023-11-17 15:11:00,251 INFO L82 GeneralOperation]: Start removeDead. Operand has 98 places, 93 transitions, 226 flow [2023-11-17 15:11:00,252 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 98 places, 93 transitions, 226 flow [2023-11-17 15:11:00,252 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:11:00,252 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 98 places, 93 transitions, 226 flow [2023-11-17 15:11:00,252 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 98 places, 93 transitions, 226 flow [2023-11-17 15:11:00,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 98 places, 93 transitions, 226 flow [2023-11-17 15:11:00,262 INFO L124 PetriNetUnfolderBase]: 11/156 cut-off events. [2023-11-17 15:11:00,262 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-17 15:11:00,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182 conditions, 156 events. 11/156 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 298 event pairs, 0 based on Foata normal form. 0/134 useless extension candidates. Maximal degree in co-relation 143. Up to 12 conditions per place. [2023-11-17 15:11:00,266 INFO L119 LiptonReduction]: Number of co-enabled transitions 4800 [2023-11-17 15:11:01,639 INFO L134 LiptonReduction]: Checked pairs total: 8038 [2023-11-17 15:11:01,640 INFO L136 LiptonReduction]: Total number of compositions: 80 [2023-11-17 15:11:01,641 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:11:01,641 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=LoopHeads, 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;@7144ba59, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:11:01,641 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-17 15:11:01,642 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:11:01,643 INFO L124 PetriNetUnfolderBase]: 1/9 cut-off events. [2023-11-17 15:11:01,643 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:11:01,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:11:01,643 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-17 15:11:01,643 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-17 15:11:01,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:11:01,643 INFO L85 PathProgramCache]: Analyzing trace with hash 748334306, now seen corresponding path program 1 times [2023-11-17 15:11:01,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:11:01,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581524144] [2023-11-17 15:11:01,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:11:01,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:11:01,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:11:01,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:11:01,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:11:01,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581524144] [2023-11-17 15:11:01,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581524144] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:11:01,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:11:01,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:11:01,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100211284] [2023-11-17 15:11:01,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:11:01,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:11:01,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:11:01,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:11:01,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:11:01,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 173 [2023-11-17 15:11:01,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 28 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 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) [2023-11-17 15:11:01,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:11:01,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 173 [2023-11-17 15:11:01,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:11:02,680 INFO L124 PetriNetUnfolderBase]: 12384/17359 cut-off events. [2023-11-17 15:11:02,680 INFO L125 PetriNetUnfolderBase]: For 8948/8948 co-relation queries the response was YES. [2023-11-17 15:11:02,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36660 conditions, 17359 events. 12384/17359 cut-off events. For 8948/8948 co-relation queries the response was YES. Maximal size of possible extension queue 1150. Compared 107503 event pairs, 6940 based on Foata normal form. 0/12846 useless extension candidates. Maximal degree in co-relation 7478. Up to 11057 conditions per place. [2023-11-17 15:11:02,863 INFO L140 encePairwiseOnDemand]: 163/173 looper letters, 34 selfloop transitions, 6 changer transitions 0/43 dead transitions. [2023-11-17 15:11:02,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 43 transitions, 238 flow [2023-11-17 15:11:02,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:11:02,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:11:02,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 232 transitions. [2023-11-17 15:11:02,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44701348747591524 [2023-11-17 15:11:02,865 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 232 transitions. [2023-11-17 15:11:02,865 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 232 transitions. [2023-11-17 15:11:02,865 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:11:02,865 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 232 transitions. [2023-11-17 15:11:02,866 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 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) [2023-11-17 15:11:02,867 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 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) [2023-11-17 15:11:02,867 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 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) [2023-11-17 15:11:02,867 INFO L175 Difference]: Start difference. First operand has 37 places, 28 transitions, 96 flow. Second operand 3 states and 232 transitions. [2023-11-17 15:11:02,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 43 transitions, 238 flow [2023-11-17 15:11:02,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 43 transitions, 214 flow, removed 12 selfloop flow, removed 0 redundant places. [2023-11-17 15:11:02,874 INFO L231 Difference]: Finished difference. Result has 40 places, 30 transitions, 124 flow [2023-11-17 15:11:02,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=124, PETRI_PLACES=40, PETRI_TRANSITIONS=30} [2023-11-17 15:11:02,875 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 3 predicate places. [2023-11-17 15:11:02,875 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 30 transitions, 124 flow [2023-11-17 15:11:02,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 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) [2023-11-17 15:11:02,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:11:02,875 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:11:02,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-11-17 15:11:02,876 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-17 15:11:02,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:11:02,876 INFO L85 PathProgramCache]: Analyzing trace with hash -433500854, now seen corresponding path program 1 times [2023-11-17 15:11:02,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:11:02,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589919421] [2023-11-17 15:11:02,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:11:02,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:11:02,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:11:02,896 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 15:11:02,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:11:02,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589919421] [2023-11-17 15:11:02,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589919421] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:11:02,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:11:02,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:11:02,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344863235] [2023-11-17 15:11:02,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:11:02,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:11:02,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:11:02,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:11:02,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:11:02,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 173 [2023-11-17 15:11:02,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 30 transitions, 124 flow. Second operand has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 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) [2023-11-17 15:11:02,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:11:02,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 173 [2023-11-17 15:11:02,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:11:04,639 INFO L124 PetriNetUnfolderBase]: 17214/24347 cut-off events. [2023-11-17 15:11:04,639 INFO L125 PetriNetUnfolderBase]: For 17453/17453 co-relation queries the response was YES. [2023-11-17 15:11:04,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61701 conditions, 24347 events. 17214/24347 cut-off events. For 17453/17453 co-relation queries the response was YES. Maximal size of possible extension queue 1703. Compared 162205 event pairs, 8064 based on Foata normal form. 0/19319 useless extension candidates. Maximal degree in co-relation 29058. Up to 15695 conditions per place. [2023-11-17 15:11:04,812 INFO L140 encePairwiseOnDemand]: 166/173 looper letters, 38 selfloop transitions, 10 changer transitions 0/51 dead transitions. [2023-11-17 15:11:04,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 51 transitions, 307 flow [2023-11-17 15:11:04,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:11:04,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:11:04,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 226 transitions. [2023-11-17 15:11:04,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43545279383429675 [2023-11-17 15:11:04,814 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 226 transitions. [2023-11-17 15:11:04,814 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 226 transitions. [2023-11-17 15:11:04,814 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:11:04,814 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 226 transitions. [2023-11-17 15:11:04,815 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 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) [2023-11-17 15:11:04,816 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 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) [2023-11-17 15:11:04,816 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 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) [2023-11-17 15:11:04,816 INFO L175 Difference]: Start difference. First operand has 40 places, 30 transitions, 124 flow. Second operand 3 states and 226 transitions. [2023-11-17 15:11:04,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 51 transitions, 307 flow [2023-11-17 15:11:04,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 51 transitions, 285 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-17 15:11:04,950 INFO L231 Difference]: Finished difference. Result has 42 places, 38 transitions, 200 flow [2023-11-17 15:11:04,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=200, PETRI_PLACES=42, PETRI_TRANSITIONS=38} [2023-11-17 15:11:04,950 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 5 predicate places. [2023-11-17 15:11:04,951 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 38 transitions, 200 flow [2023-11-17 15:11:04,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 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) [2023-11-17 15:11:04,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:11:04,951 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:11:04,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-11-17 15:11:04,952 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-17 15:11:04,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:11:04,952 INFO L85 PathProgramCache]: Analyzing trace with hash -551493047, now seen corresponding path program 1 times [2023-11-17 15:11:04,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:11:04,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037112826] [2023-11-17 15:11:04,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:11:04,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:11:04,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:11:04,982 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 15:11:04,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:11:04,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037112826] [2023-11-17 15:11:04,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037112826] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:11:04,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:11:04,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 15:11:04,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818035909] [2023-11-17 15:11:04,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:11:04,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 15:11:04,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:11:04,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 15:11:04,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 15:11:04,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 173 [2023-11-17 15:11:04,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 38 transitions, 200 flow. Second operand has 4 states, 4 states have (on average 63.75) internal successors, (255), 4 states have internal predecessors, (255), 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) [2023-11-17 15:11:04,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:11:04,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 173 [2023-11-17 15:11:04,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:11:06,216 INFO L124 PetriNetUnfolderBase]: 13946/19127 cut-off events. [2023-11-17 15:11:06,217 INFO L125 PetriNetUnfolderBase]: For 18150/18150 co-relation queries the response was YES. [2023-11-17 15:11:06,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56882 conditions, 19127 events. 13946/19127 cut-off events. For 18150/18150 co-relation queries the response was YES. Maximal size of possible extension queue 1381. Compared 120950 event pairs, 2700 based on Foata normal form. 0/15793 useless extension candidates. Maximal degree in co-relation 56734. Up to 15496 conditions per place. [2023-11-17 15:11:06,358 INFO L140 encePairwiseOnDemand]: 171/173 looper letters, 53 selfloop transitions, 2 changer transitions 0/58 dead transitions. [2023-11-17 15:11:06,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 58 transitions, 412 flow [2023-11-17 15:11:06,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:11:06,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:11:06,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 225 transitions. [2023-11-17 15:11:06,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43352601156069365 [2023-11-17 15:11:06,360 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 225 transitions. [2023-11-17 15:11:06,360 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 225 transitions. [2023-11-17 15:11:06,360 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:11:06,360 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 225 transitions. [2023-11-17 15:11:06,361 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 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) [2023-11-17 15:11:06,361 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 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) [2023-11-17 15:11:06,362 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 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) [2023-11-17 15:11:06,362 INFO L175 Difference]: Start difference. First operand has 42 places, 38 transitions, 200 flow. Second operand 3 states and 225 transitions. [2023-11-17 15:11:06,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 58 transitions, 412 flow [2023-11-17 15:11:06,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 58 transitions, 382 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-17 15:11:06,459 INFO L231 Difference]: Finished difference. Result has 41 places, 37 transitions, 180 flow [2023-11-17 15:11:06,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=180, PETRI_PLACES=41, PETRI_TRANSITIONS=37} [2023-11-17 15:11:06,459 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 4 predicate places. [2023-11-17 15:11:06,459 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 180 flow [2023-11-17 15:11:06,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 63.75) internal successors, (255), 4 states have internal predecessors, (255), 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) [2023-11-17 15:11:06,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:11:06,460 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:11:06,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-11-17 15:11:06,460 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-17 15:11:06,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:11:06,460 INFO L85 PathProgramCache]: Analyzing trace with hash -553619969, now seen corresponding path program 1 times [2023-11-17 15:11:06,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:11:06,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802796089] [2023-11-17 15:11:06,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:11:06,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:11:06,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:11:06,492 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 15:11:06,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:11:06,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802796089] [2023-11-17 15:11:06,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802796089] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:11:06,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:11:06,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 15:11:06,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292233919] [2023-11-17 15:11:06,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:11:06,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 15:11:06,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:11:06,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 15:11:06,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 15:11:06,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 173 [2023-11-17 15:11:06,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 180 flow. Second operand has 4 states, 4 states have (on average 63.75) internal successors, (255), 4 states have internal predecessors, (255), 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) [2023-11-17 15:11:06,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:11:06,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 173 [2023-11-17 15:11:06,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:11:07,543 INFO L124 PetriNetUnfolderBase]: 11269/15577 cut-off events. [2023-11-17 15:11:07,544 INFO L125 PetriNetUnfolderBase]: For 12270/12270 co-relation queries the response was YES. [2023-11-17 15:11:07,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44801 conditions, 15577 events. 11269/15577 cut-off events. For 12270/12270 co-relation queries the response was YES. Maximal size of possible extension queue 1135. Compared 96058 event pairs, 1895 based on Foata normal form. 0/12791 useless extension candidates. Maximal degree in co-relation 23175. Up to 12576 conditions per place. [2023-11-17 15:11:07,661 INFO L140 encePairwiseOnDemand]: 171/173 looper letters, 50 selfloop transitions, 2 changer transitions 0/55 dead transitions. [2023-11-17 15:11:07,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 55 transitions, 367 flow [2023-11-17 15:11:07,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:11:07,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:11:07,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 222 transitions. [2023-11-17 15:11:07,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4277456647398844 [2023-11-17 15:11:07,663 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 222 transitions. [2023-11-17 15:11:07,663 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 222 transitions. [2023-11-17 15:11:07,664 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:11:07,664 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 222 transitions. [2023-11-17 15:11:07,666 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 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) [2023-11-17 15:11:07,667 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 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) [2023-11-17 15:11:07,667 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 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) [2023-11-17 15:11:07,667 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 180 flow. Second operand 3 states and 222 transitions. [2023-11-17 15:11:07,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 55 transitions, 367 flow [2023-11-17 15:11:07,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 55 transitions, 364 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 15:11:07,673 INFO L231 Difference]: Finished difference. Result has 41 places, 36 transitions, 178 flow [2023-11-17 15:11:07,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=178, PETRI_PLACES=41, PETRI_TRANSITIONS=36} [2023-11-17 15:11:07,673 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 4 predicate places. [2023-11-17 15:11:07,673 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 36 transitions, 178 flow [2023-11-17 15:11:07,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 63.75) internal successors, (255), 4 states have internal predecessors, (255), 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) [2023-11-17 15:11:07,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:11:07,674 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-17 15:11:07,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-11-17 15:11:07,674 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-17 15:11:07,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:11:07,674 INFO L85 PathProgramCache]: Analyzing trace with hash -237458750, now seen corresponding path program 1 times [2023-11-17 15:11:07,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:11:07,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415345669] [2023-11-17 15:11:07,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:11:07,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:11:07,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:11:07,699 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-17 15:11:07,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:11:07,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415345669] [2023-11-17 15:11:07,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415345669] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:11:07,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:11:07,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:11:07,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137581307] [2023-11-17 15:11:07,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:11:07,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:11:07,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:11:07,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:11:07,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:11:07,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 173 [2023-11-17 15:11:07,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 36 transitions, 178 flow. Second operand has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 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) [2023-11-17 15:11:07,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:11:07,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 173 [2023-11-17 15:11:07,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:11:09,174 INFO L124 PetriNetUnfolderBase]: 14850/21601 cut-off events. [2023-11-17 15:11:09,175 INFO L125 PetriNetUnfolderBase]: For 23674/23674 co-relation queries the response was YES. [2023-11-17 15:11:09,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61240 conditions, 21601 events. 14850/21601 cut-off events. For 23674/23674 co-relation queries the response was YES. Maximal size of possible extension queue 1651. Compared 149943 event pairs, 6228 based on Foata normal form. 0/18162 useless extension candidates. Maximal degree in co-relation 35036. Up to 14235 conditions per place. [2023-11-17 15:11:09,319 INFO L140 encePairwiseOnDemand]: 166/173 looper letters, 40 selfloop transitions, 17 changer transitions 0/60 dead transitions. [2023-11-17 15:11:09,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 60 transitions, 412 flow [2023-11-17 15:11:09,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:11:09,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:11:09,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 221 transitions. [2023-11-17 15:11:09,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4258188824662813 [2023-11-17 15:11:09,320 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 221 transitions. [2023-11-17 15:11:09,320 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 221 transitions. [2023-11-17 15:11:09,320 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:11:09,320 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 221 transitions. [2023-11-17 15:11:09,321 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 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) [2023-11-17 15:11:09,322 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 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) [2023-11-17 15:11:09,322 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 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) [2023-11-17 15:11:09,322 INFO L175 Difference]: Start difference. First operand has 41 places, 36 transitions, 178 flow. Second operand 3 states and 221 transitions. [2023-11-17 15:11:09,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 60 transitions, 412 flow [2023-11-17 15:11:09,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 60 transitions, 408 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 15:11:09,350 INFO L231 Difference]: Finished difference. Result has 44 places, 49 transitions, 350 flow [2023-11-17 15:11:09,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=350, PETRI_PLACES=44, PETRI_TRANSITIONS=49} [2023-11-17 15:11:09,350 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 7 predicate places. [2023-11-17 15:11:09,351 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 49 transitions, 350 flow [2023-11-17 15:11:09,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 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) [2023-11-17 15:11:09,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:11:09,351 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:11:09,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-11-17 15:11:09,351 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-17 15:11:09,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:11:09,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1228717239, now seen corresponding path program 1 times [2023-11-17 15:11:09,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:11:09,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144981086] [2023-11-17 15:11:09,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:11:09,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:11:09,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:11:09,462 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-17 15:11:09,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:11:09,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144981086] [2023-11-17 15:11:09,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144981086] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:11:09,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:11:09,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 15:11:09,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659022938] [2023-11-17 15:11:09,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:11:09,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 15:11:09,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:11:09,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 15:11:09,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 15:11:09,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 173 [2023-11-17 15:11:09,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 49 transitions, 350 flow. Second operand has 4 states, 4 states have (on average 64.0) internal successors, (256), 4 states have internal predecessors, (256), 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) [2023-11-17 15:11:09,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:11:09,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 173 [2023-11-17 15:11:09,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:11:10,597 INFO L124 PetriNetUnfolderBase]: 11925/16849 cut-off events. [2023-11-17 15:11:10,598 INFO L125 PetriNetUnfolderBase]: For 29495/29495 co-relation queries the response was YES. [2023-11-17 15:11:10,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59446 conditions, 16849 events. 11925/16849 cut-off events. For 29495/29495 co-relation queries the response was YES. Maximal size of possible extension queue 1331. Compared 110290 event pairs, 2241 based on Foata normal form. 954/15750 useless extension candidates. Maximal degree in co-relation 33856. Up to 13484 conditions per place. [2023-11-17 15:11:10,701 INFO L140 encePairwiseOnDemand]: 171/173 looper letters, 64 selfloop transitions, 4 changer transitions 0/71 dead transitions. [2023-11-17 15:11:10,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 71 transitions, 622 flow [2023-11-17 15:11:10,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:11:10,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:11:10,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 219 transitions. [2023-11-17 15:11:10,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42196531791907516 [2023-11-17 15:11:10,702 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 219 transitions. [2023-11-17 15:11:10,702 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 219 transitions. [2023-11-17 15:11:10,702 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:11:10,702 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 219 transitions. [2023-11-17 15:11:10,703 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 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) [2023-11-17 15:11:10,704 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 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) [2023-11-17 15:11:10,704 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 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) [2023-11-17 15:11:10,704 INFO L175 Difference]: Start difference. First operand has 44 places, 49 transitions, 350 flow. Second operand 3 states and 219 transitions. [2023-11-17 15:11:10,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 71 transitions, 622 flow [2023-11-17 15:11:10,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 71 transitions, 588 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-17 15:11:10,741 INFO L231 Difference]: Finished difference. Result has 43 places, 48 transitions, 320 flow [2023-11-17 15:11:10,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=320, PETRI_PLACES=43, PETRI_TRANSITIONS=48} [2023-11-17 15:11:10,742 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 6 predicate places. [2023-11-17 15:11:10,742 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 48 transitions, 320 flow [2023-11-17 15:11:10,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 64.0) internal successors, (256), 4 states have internal predecessors, (256), 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) [2023-11-17 15:11:10,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:11:10,743 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:11:10,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-11-17 15:11:10,743 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-17 15:11:10,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:11:10,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1196573108, now seen corresponding path program 1 times [2023-11-17 15:11:10,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:11:10,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995075170] [2023-11-17 15:11:10,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:11:10,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:11:10,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:11:10,772 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-17 15:11:10,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:11:10,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995075170] [2023-11-17 15:11:10,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995075170] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:11:10,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:11:10,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:11:10,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044355297] [2023-11-17 15:11:10,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:11:10,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:11:10,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:11:10,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:11:10,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:11:10,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 173 [2023-11-17 15:11:10,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 48 transitions, 320 flow. Second operand has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 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) [2023-11-17 15:11:10,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:11:10,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 173 [2023-11-17 15:11:10,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:11:12,266 INFO L124 PetriNetUnfolderBase]: 14852/22111 cut-off events. [2023-11-17 15:11:12,266 INFO L125 PetriNetUnfolderBase]: For 40827/40827 co-relation queries the response was YES. [2023-11-17 15:11:12,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72356 conditions, 22111 events. 14852/22111 cut-off events. For 40827/40827 co-relation queries the response was YES. Maximal size of possible extension queue 1850. Compared 160911 event pairs, 5610 based on Foata normal form. 0/19811 useless extension candidates. Maximal degree in co-relation 41488. Up to 14769 conditions per place. [2023-11-17 15:11:12,408 INFO L140 encePairwiseOnDemand]: 166/173 looper letters, 47 selfloop transitions, 29 changer transitions 0/79 dead transitions. [2023-11-17 15:11:12,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 79 transitions, 687 flow [2023-11-17 15:11:12,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:11:12,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:11:12,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 218 transitions. [2023-11-17 15:11:12,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42003853564547206 [2023-11-17 15:11:12,410 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 218 transitions. [2023-11-17 15:11:12,410 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 218 transitions. [2023-11-17 15:11:12,411 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:11:12,411 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 218 transitions. [2023-11-17 15:11:12,411 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 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) [2023-11-17 15:11:12,412 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 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) [2023-11-17 15:11:12,412 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 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) [2023-11-17 15:11:12,412 INFO L175 Difference]: Start difference. First operand has 43 places, 48 transitions, 320 flow. Second operand 3 states and 218 transitions. [2023-11-17 15:11:12,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 79 transitions, 687 flow [2023-11-17 15:11:12,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 79 transitions, 679 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 15:11:12,445 INFO L231 Difference]: Finished difference. Result has 46 places, 69 transitions, 650 flow [2023-11-17 15:11:12,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=650, PETRI_PLACES=46, PETRI_TRANSITIONS=69} [2023-11-17 15:11:12,446 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 9 predicate places. [2023-11-17 15:11:12,446 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 69 transitions, 650 flow [2023-11-17 15:11:12,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 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) [2023-11-17 15:11:12,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:11:12,446 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:11:12,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-11-17 15:11:12,446 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-17 15:11:12,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:11:12,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1560942946, now seen corresponding path program 1 times [2023-11-17 15:11:12,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:11:12,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265734695] [2023-11-17 15:11:12,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:11:12,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:11:12,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:11:12,502 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-17 15:11:12,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:11:12,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265734695] [2023-11-17 15:11:12,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265734695] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:11:12,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:11:12,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 15:11:12,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46090502] [2023-11-17 15:11:12,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:11:12,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 15:11:12,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:11:12,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 15:11:12,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 15:11:12,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 173 [2023-11-17 15:11:12,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 69 transitions, 650 flow. Second operand has 4 states, 4 states have (on average 64.25) internal successors, (257), 4 states have internal predecessors, (257), 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) [2023-11-17 15:11:12,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:11:12,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 173 [2023-11-17 15:11:12,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:11:13,670 INFO L124 PetriNetUnfolderBase]: 11939/17421 cut-off events. [2023-11-17 15:11:13,671 INFO L125 PetriNetUnfolderBase]: For 47319/47319 co-relation queries the response was YES. [2023-11-17 15:11:13,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69707 conditions, 17421 events. 11939/17421 cut-off events. For 47319/47319 co-relation queries the response was YES. Maximal size of possible extension queue 1494. Compared 121203 event pairs, 2639 based on Foata normal form. 1012/17369 useless extension candidates. Maximal degree in co-relation 39902. Up to 13486 conditions per place. [2023-11-17 15:11:13,960 INFO L140 encePairwiseOnDemand]: 171/173 looper letters, 86 selfloop transitions, 8 changer transitions 0/97 dead transitions. [2023-11-17 15:11:13,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 97 transitions, 1073 flow [2023-11-17 15:11:13,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:11:13,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:11:13,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 216 transitions. [2023-11-17 15:11:13,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4161849710982659 [2023-11-17 15:11:13,965 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 216 transitions. [2023-11-17 15:11:13,965 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 216 transitions. [2023-11-17 15:11:13,965 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:11:13,965 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 216 transitions. [2023-11-17 15:11:13,966 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 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) [2023-11-17 15:11:13,967 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 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) [2023-11-17 15:11:13,967 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 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) [2023-11-17 15:11:13,967 INFO L175 Difference]: Start difference. First operand has 46 places, 69 transitions, 650 flow. Second operand 3 states and 216 transitions. [2023-11-17 15:11:13,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 97 transitions, 1073 flow [2023-11-17 15:11:14,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 97 transitions, 1015 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-17 15:11:14,016 INFO L231 Difference]: Finished difference. Result has 45 places, 68 transitions, 604 flow [2023-11-17 15:11:14,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=588, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=604, PETRI_PLACES=45, PETRI_TRANSITIONS=68} [2023-11-17 15:11:14,017 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 8 predicate places. [2023-11-17 15:11:14,017 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 68 transitions, 604 flow [2023-11-17 15:11:14,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 64.25) internal successors, (257), 4 states have internal predecessors, (257), 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) [2023-11-17 15:11:14,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:11:14,018 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:11:14,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-11-17 15:11:14,018 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-17 15:11:14,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:11:14,019 INFO L85 PathProgramCache]: Analyzing trace with hash 560316090, now seen corresponding path program 1 times [2023-11-17 15:11:14,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:11:14,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913861544] [2023-11-17 15:11:14,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:11:14,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:11:14,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:11:14,040 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-17 15:11:14,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:11:14,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913861544] [2023-11-17 15:11:14,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913861544] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:11:14,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:11:14,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:11:14,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468551959] [2023-11-17 15:11:14,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:11:14,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:11:14,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:11:14,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:11:14,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:11:14,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 173 [2023-11-17 15:11:14,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 68 transitions, 604 flow. Second operand has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 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) [2023-11-17 15:11:14,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:11:14,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 173 [2023-11-17 15:11:14,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:11:15,609 INFO L124 PetriNetUnfolderBase]: 13634/21204 cut-off events. [2023-11-17 15:11:15,609 INFO L125 PetriNetUnfolderBase]: For 57977/57977 co-relation queries the response was YES. [2023-11-17 15:11:15,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78743 conditions, 21204 events. 13634/21204 cut-off events. For 57977/57977 co-relation queries the response was YES. Maximal size of possible extension queue 1973. Compared 163784 event pairs, 5130 based on Foata normal form. 0/20302 useless extension candidates. Maximal degree in co-relation 42344. Up to 14771 conditions per place. [2023-11-17 15:11:15,755 INFO L140 encePairwiseOnDemand]: 166/173 looper letters, 58 selfloop transitions, 49 changer transitions 0/110 dead transitions. [2023-11-17 15:11:15,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 110 transitions, 1214 flow [2023-11-17 15:11:15,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:11:15,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:11:15,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 215 transitions. [2023-11-17 15:11:15,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142581888246628 [2023-11-17 15:11:15,757 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 215 transitions. [2023-11-17 15:11:15,757 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 215 transitions. [2023-11-17 15:11:15,757 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:11:15,757 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 215 transitions. [2023-11-17 15:11:15,758 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 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) [2023-11-17 15:11:15,759 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 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) [2023-11-17 15:11:15,759 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 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) [2023-11-17 15:11:15,760 INFO L175 Difference]: Start difference. First operand has 45 places, 68 transitions, 604 flow. Second operand 3 states and 215 transitions. [2023-11-17 15:11:15,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 110 transitions, 1214 flow [2023-11-17 15:11:15,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 110 transitions, 1198 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 15:11:15,815 INFO L231 Difference]: Finished difference. Result has 48 places, 101 transitions, 1214 flow [2023-11-17 15:11:15,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=596, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1214, PETRI_PLACES=48, PETRI_TRANSITIONS=101} [2023-11-17 15:11:15,815 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 11 predicate places. [2023-11-17 15:11:15,816 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 101 transitions, 1214 flow [2023-11-17 15:11:15,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 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) [2023-11-17 15:11:15,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:11:15,816 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:11:15,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2023-11-17 15:11:15,816 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-17 15:11:15,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:11:15,817 INFO L85 PathProgramCache]: Analyzing trace with hash 189933000, now seen corresponding path program 1 times [2023-11-17 15:11:15,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:11:15,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517605700] [2023-11-17 15:11:15,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:11:15,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:11:15,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:11:15,855 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-17 15:11:15,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:11:15,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517605700] [2023-11-17 15:11:15,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517605700] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:11:15,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:11:15,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 15:11:15,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534465749] [2023-11-17 15:11:15,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:11:15,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 15:11:15,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:11:15,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 15:11:15,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 15:11:15,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 173 [2023-11-17 15:11:15,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 101 transitions, 1214 flow. Second operand has 4 states, 4 states have (on average 64.5) internal successors, (258), 4 states have internal predecessors, (258), 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) [2023-11-17 15:11:15,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:11:15,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 173 [2023-11-17 15:11:15,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:11:17,301 INFO L124 PetriNetUnfolderBase]: 11331/18039 cut-off events. [2023-11-17 15:11:17,301 INFO L125 PetriNetUnfolderBase]: For 72733/72733 co-relation queries the response was YES. [2023-11-17 15:11:17,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77448 conditions, 18039 events. 11331/18039 cut-off events. For 72733/72733 co-relation queries the response was YES. Maximal size of possible extension queue 1637. Compared 141464 event pairs, 3585 based on Foata normal form. 862/18860 useless extension candidates. Maximal degree in co-relation 41752. Up to 10940 conditions per place. [2023-11-17 15:11:17,412 INFO L140 encePairwiseOnDemand]: 171/173 looper letters, 118 selfloop transitions, 16 changer transitions 0/137 dead transitions. [2023-11-17 15:11:17,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 137 transitions, 1876 flow [2023-11-17 15:11:17,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:11:17,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:11:17,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 213 transitions. [2023-11-17 15:11:17,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41040462427745666 [2023-11-17 15:11:17,413 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 213 transitions. [2023-11-17 15:11:17,413 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 213 transitions. [2023-11-17 15:11:17,413 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:11:17,413 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 213 transitions. [2023-11-17 15:11:17,414 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 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) [2023-11-17 15:11:17,415 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 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) [2023-11-17 15:11:17,415 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 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) [2023-11-17 15:11:17,415 INFO L175 Difference]: Start difference. First operand has 48 places, 101 transitions, 1214 flow. Second operand 3 states and 213 transitions. [2023-11-17 15:11:17,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 137 transitions, 1876 flow [2023-11-17 15:11:17,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 137 transitions, 1778 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-17 15:11:17,480 INFO L231 Difference]: Finished difference. Result has 47 places, 100 transitions, 1144 flow [2023-11-17 15:11:17,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=1112, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1144, PETRI_PLACES=47, PETRI_TRANSITIONS=100} [2023-11-17 15:11:17,481 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 10 predicate places. [2023-11-17 15:11:17,481 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 100 transitions, 1144 flow [2023-11-17 15:11:17,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 64.5) internal successors, (258), 4 states have internal predecessors, (258), 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) [2023-11-17 15:11:17,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:11:17,481 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:11:17,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-11-17 15:11:17,482 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-17 15:11:17,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:11:17,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1588726146, now seen corresponding path program 1 times [2023-11-17 15:11:17,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:11:17,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205351084] [2023-11-17 15:11:17,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:11:17,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:11:17,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:11:17,492 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:11:17,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:11:17,500 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:11:17,500 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:11:17,500 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-11-17 15:11:17,501 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2023-11-17 15:11:17,501 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2023-11-17 15:11:17,501 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2023-11-17 15:11:17,501 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2023-11-17 15:11:17,501 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2023-11-17 15:11:17,501 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2023-11-17 15:11:17,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-11-17 15:11:17,501 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:11:17,502 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:11:17,502 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-11-17 15:11:17,518 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:11:17,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 112 places, 106 transitions, 266 flow [2023-11-17 15:11:17,531 INFO L124 PetriNetUnfolderBase]: 13/182 cut-off events. [2023-11-17 15:11:17,531 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2023-11-17 15:11:17,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 216 conditions, 182 events. 13/182 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 357 event pairs, 0 based on Foata normal form. 0/156 useless extension candidates. Maximal degree in co-relation 175. Up to 14 conditions per place. [2023-11-17 15:11:17,532 INFO L82 GeneralOperation]: Start removeDead. Operand has 112 places, 106 transitions, 266 flow [2023-11-17 15:11:17,533 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 112 places, 106 transitions, 266 flow [2023-11-17 15:11:17,533 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:11:17,533 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 112 places, 106 transitions, 266 flow [2023-11-17 15:11:17,533 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 112 places, 106 transitions, 266 flow [2023-11-17 15:11:17,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 112 places, 106 transitions, 266 flow [2023-11-17 15:11:17,544 INFO L124 PetriNetUnfolderBase]: 13/182 cut-off events. [2023-11-17 15:11:17,544 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2023-11-17 15:11:17,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 216 conditions, 182 events. 13/182 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 357 event pairs, 0 based on Foata normal form. 0/156 useless extension candidates. Maximal degree in co-relation 175. Up to 14 conditions per place. [2023-11-17 15:11:17,549 INFO L119 LiptonReduction]: Number of co-enabled transitions 6696 [2023-11-17 15:11:18,964 INFO L134 LiptonReduction]: Checked pairs total: 10087 [2023-11-17 15:11:18,965 INFO L136 LiptonReduction]: Total number of compositions: 86 [2023-11-17 15:11:18,966 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:11:18,966 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=LoopHeads, 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;@7144ba59, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:11:18,966 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-11-17 15:11:18,967 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:11:18,967 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2023-11-17 15:11:18,968 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:11:18,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:11:18,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-17 15:11:18,968 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2023-11-17 15:11:18,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:11:18,968 INFO L85 PathProgramCache]: Analyzing trace with hash 944913552, now seen corresponding path program 1 times [2023-11-17 15:11:18,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:11:18,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417510635] [2023-11-17 15:11:18,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:11:18,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:11:18,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:11:18,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:11:18,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:11:18,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417510635] [2023-11-17 15:11:18,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417510635] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:11:18,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:11:18,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:11:18,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130407121] [2023-11-17 15:11:18,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:11:18,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:11:18,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:11:18,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:11:18,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:11:18,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 192 [2023-11-17 15:11:18,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 31 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 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) [2023-11-17 15:11:18,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:11:18,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 192 [2023-11-17 15:11:18,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:11:23,589 INFO L124 PetriNetUnfolderBase]: 62014/82081 cut-off events. [2023-11-17 15:11:23,589 INFO L125 PetriNetUnfolderBase]: For 52408/52408 co-relation queries the response was YES. [2023-11-17 15:11:23,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174026 conditions, 82081 events. 62014/82081 cut-off events. For 52408/52408 co-relation queries the response was YES. Maximal size of possible extension queue 4290. Compared 523747 event pairs, 35952 based on Foata normal form. 0/59906 useless extension candidates. Maximal degree in co-relation 37143. Up to 54027 conditions per place. [2023-11-17 15:11:24,008 INFO L140 encePairwiseOnDemand]: 182/192 looper letters, 41 selfloop transitions, 7 changer transitions 0/51 dead transitions. [2023-11-17 15:11:24,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 51 transitions, 297 flow [2023-11-17 15:11:24,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:11:24,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:11:24,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 263 transitions. [2023-11-17 15:11:24,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4565972222222222 [2023-11-17 15:11:24,009 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 263 transitions. [2023-11-17 15:11:24,010 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 263 transitions. [2023-11-17 15:11:24,010 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:11:24,010 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 263 transitions. [2023-11-17 15:11:24,011 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 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) [2023-11-17 15:11:24,011 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 192.0) internal successors, (768), 4 states have internal predecessors, (768), 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) [2023-11-17 15:11:24,012 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 192.0) internal successors, (768), 4 states have internal predecessors, (768), 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) [2023-11-17 15:11:24,012 INFO L175 Difference]: Start difference. First operand has 43 places, 31 transitions, 116 flow. Second operand 3 states and 263 transitions. [2023-11-17 15:11:24,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 51 transitions, 297 flow [2023-11-17 15:11:24,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 51 transitions, 257 flow, removed 20 selfloop flow, removed 0 redundant places. [2023-11-17 15:11:24,042 INFO L231 Difference]: Finished difference. Result has 46 places, 35 transitions, 146 flow [2023-11-17 15:11:24,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=46, PETRI_TRANSITIONS=35} [2023-11-17 15:11:24,043 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2023-11-17 15:11:24,043 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 35 transitions, 146 flow [2023-11-17 15:11:24,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 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) [2023-11-17 15:11:24,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:11:24,043 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:11:24,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2023-11-17 15:11:24,044 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2023-11-17 15:11:24,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:11:24,044 INFO L85 PathProgramCache]: Analyzing trace with hash -25056142, now seen corresponding path program 1 times [2023-11-17 15:11:24,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:11:24,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055440187] [2023-11-17 15:11:24,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:11:24,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:11:24,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:11:24,074 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 15:11:24,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:11:24,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055440187] [2023-11-17 15:11:24,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055440187] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:11:24,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:11:24,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:11:24,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892713782] [2023-11-17 15:11:24,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:11:24,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:11:24,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:11:24,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:11:24,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:11:24,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 192 [2023-11-17 15:11:24,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 35 transitions, 146 flow. Second operand has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 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) [2023-11-17 15:11:24,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:11:24,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 192 [2023-11-17 15:11:24,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:11:31,265 INFO L124 PetriNetUnfolderBase]: 87642/116859 cut-off events. [2023-11-17 15:11:31,265 INFO L125 PetriNetUnfolderBase]: For 86614/86614 co-relation queries the response was YES. [2023-11-17 15:11:31,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 294613 conditions, 116859 events. 87642/116859 cut-off events. For 86614/86614 co-relation queries the response was YES. Maximal size of possible extension queue 6344. Compared 795730 event pairs, 43070 based on Foata normal form. 0/90803 useless extension candidates. Maximal degree in co-relation 138864. Up to 77979 conditions per place. [2023-11-17 15:11:32,002 INFO L140 encePairwiseOnDemand]: 184/192 looper letters, 46 selfloop transitions, 12 changer transitions 0/61 dead transitions. [2023-11-17 15:11:32,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 61 transitions, 370 flow [2023-11-17 15:11:32,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:11:32,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:11:32,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 258 transitions. [2023-11-17 15:11:32,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4479166666666667 [2023-11-17 15:11:32,004 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 258 transitions. [2023-11-17 15:11:32,004 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 258 transitions. [2023-11-17 15:11:32,004 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:11:32,004 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 258 transitions. [2023-11-17 15:11:32,005 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 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) [2023-11-17 15:11:32,006 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 192.0) internal successors, (768), 4 states have internal predecessors, (768), 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) [2023-11-17 15:11:32,006 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 192.0) internal successors, (768), 4 states have internal predecessors, (768), 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) [2023-11-17 15:11:32,006 INFO L175 Difference]: Start difference. First operand has 46 places, 35 transitions, 146 flow. Second operand 3 states and 258 transitions. [2023-11-17 15:11:32,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 61 transitions, 370 flow [2023-11-17 15:11:33,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 61 transitions, 344 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-17 15:11:33,916 INFO L231 Difference]: Finished difference. Result has 48 places, 45 transitions, 240 flow [2023-11-17 15:11:33,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=240, PETRI_PLACES=48, PETRI_TRANSITIONS=45} [2023-11-17 15:11:33,916 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 5 predicate places. [2023-11-17 15:11:33,916 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 45 transitions, 240 flow [2023-11-17 15:11:33,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 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) [2023-11-17 15:11:33,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:11:33,917 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:11:33,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2023-11-17 15:11:33,917 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2023-11-17 15:11:33,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:11:33,917 INFO L85 PathProgramCache]: Analyzing trace with hash -774258253, now seen corresponding path program 1 times [2023-11-17 15:11:33,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:11:33,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188473768] [2023-11-17 15:11:33,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:11:33,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:11:33,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:11:34,004 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 15:11:34,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:11:34,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188473768] [2023-11-17 15:11:34,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188473768] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:11:34,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:11:34,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 15:11:34,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620680904] [2023-11-17 15:11:34,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:11:34,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 15:11:34,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:11:34,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 15:11:34,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 15:11:34,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 192 [2023-11-17 15:11:34,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 45 transitions, 240 flow. Second operand has 4 states, 4 states have (on average 71.75) internal successors, (287), 4 states have internal predecessors, (287), 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) [2023-11-17 15:11:34,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:11:34,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 192 [2023-11-17 15:11:34,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:11:39,373 INFO L124 PetriNetUnfolderBase]: 71236/92293 cut-off events. [2023-11-17 15:11:39,374 INFO L125 PetriNetUnfolderBase]: For 86142/86142 co-relation queries the response was YES. [2023-11-17 15:11:39,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 271986 conditions, 92293 events. 71236/92293 cut-off events. For 86142/86142 co-relation queries the response was YES. Maximal size of possible extension queue 5175. Compared 590280 event pairs, 13780 based on Foata normal form. 0/74045 useless extension candidates. Maximal degree in co-relation 271549. Up to 74462 conditions per place. [2023-11-17 15:11:39,973 INFO L140 encePairwiseOnDemand]: 190/192 looper letters, 65 selfloop transitions, 2 changer transitions 0/70 dead transitions. [2023-11-17 15:11:39,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 70 transitions, 501 flow [2023-11-17 15:11:39,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:11:39,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:11:39,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 257 transitions. [2023-11-17 15:11:39,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4461805555555556 [2023-11-17 15:11:39,974 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 257 transitions. [2023-11-17 15:11:39,974 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 257 transitions. [2023-11-17 15:11:39,974 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:11:39,974 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 257 transitions. [2023-11-17 15:11:39,975 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 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) [2023-11-17 15:11:39,976 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 192.0) internal successors, (768), 4 states have internal predecessors, (768), 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) [2023-11-17 15:11:39,976 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 192.0) internal successors, (768), 4 states have internal predecessors, (768), 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) [2023-11-17 15:11:39,976 INFO L175 Difference]: Start difference. First operand has 48 places, 45 transitions, 240 flow. Second operand 3 states and 257 transitions. [2023-11-17 15:11:39,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 70 transitions, 501 flow [2023-11-17 15:11:41,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 70 transitions, 465 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-17 15:11:41,270 INFO L231 Difference]: Finished difference. Result has 47 places, 44 transitions, 216 flow [2023-11-17 15:11:41,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=216, PETRI_PLACES=47, PETRI_TRANSITIONS=44} [2023-11-17 15:11:41,271 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 4 predicate places. [2023-11-17 15:11:41,271 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 44 transitions, 216 flow [2023-11-17 15:11:41,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 71.75) internal successors, (287), 4 states have internal predecessors, (287), 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) [2023-11-17 15:11:41,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:11:41,271 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:11:41,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2023-11-17 15:11:41,271 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2023-11-17 15:11:41,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:11:41,272 INFO L85 PathProgramCache]: Analyzing trace with hash -776736655, now seen corresponding path program 1 times [2023-11-17 15:11:41,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:11:41,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328009004] [2023-11-17 15:11:41,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:11:41,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:11:41,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:11:41,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 15:11:41,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:11:41,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328009004] [2023-11-17 15:11:41,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328009004] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:11:41,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:11:41,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 15:11:41,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420212469] [2023-11-17 15:11:41,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:11:41,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 15:11:41,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:11:41,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 15:11:41,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 15:11:41,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 192 [2023-11-17 15:11:41,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 44 transitions, 216 flow. Second operand has 4 states, 4 states have (on average 71.75) internal successors, (287), 4 states have internal predecessors, (287), 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) [2023-11-17 15:11:41,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:11:41,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 192 [2023-11-17 15:11:41,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:11:45,525 INFO L124 PetriNetUnfolderBase]: 57777/75233 cut-off events. [2023-11-17 15:11:45,525 INFO L125 PetriNetUnfolderBase]: For 58066/58066 co-relation queries the response was YES. [2023-11-17 15:11:45,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 214254 conditions, 75233 events. 57777/75233 cut-off events. For 58066/58066 co-relation queries the response was YES. Maximal size of possible extension queue 4281. Compared 472833 event pairs, 9807 based on Foata normal form. 0/60115 useless extension candidates. Maximal degree in co-relation 113247. Up to 60562 conditions per place. [2023-11-17 15:11:46,118 INFO L140 encePairwiseOnDemand]: 190/192 looper letters, 62 selfloop transitions, 2 changer transitions 0/67 dead transitions. [2023-11-17 15:11:46,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 67 transitions, 450 flow [2023-11-17 15:11:46,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:11:46,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:11:46,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 254 transitions. [2023-11-17 15:11:46,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4409722222222222 [2023-11-17 15:11:46,119 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 254 transitions. [2023-11-17 15:11:46,119 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 254 transitions. [2023-11-17 15:11:46,119 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:11:46,120 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 254 transitions. [2023-11-17 15:11:46,120 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 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) [2023-11-17 15:11:46,121 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 192.0) internal successors, (768), 4 states have internal predecessors, (768), 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) [2023-11-17 15:11:46,121 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 192.0) internal successors, (768), 4 states have internal predecessors, (768), 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) [2023-11-17 15:11:46,121 INFO L175 Difference]: Start difference. First operand has 47 places, 44 transitions, 216 flow. Second operand 3 states and 254 transitions. [2023-11-17 15:11:46,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 67 transitions, 450 flow [2023-11-17 15:11:46,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 67 transitions, 447 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 15:11:46,162 INFO L231 Difference]: Finished difference. Result has 47 places, 43 transitions, 214 flow [2023-11-17 15:11:46,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=214, PETRI_PLACES=47, PETRI_TRANSITIONS=43} [2023-11-17 15:11:46,162 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 4 predicate places. [2023-11-17 15:11:46,162 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 43 transitions, 214 flow [2023-11-17 15:11:46,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 71.75) internal successors, (287), 4 states have internal predecessors, (287), 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) [2023-11-17 15:11:46,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:11:46,162 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-17 15:11:46,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2023-11-17 15:11:46,162 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2023-11-17 15:11:46,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:11:46,163 INFO L85 PathProgramCache]: Analyzing trace with hash 964238813, now seen corresponding path program 1 times [2023-11-17 15:11:46,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:11:46,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038437653] [2023-11-17 15:11:46,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:11:46,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:11:46,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:11:46,188 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-17 15:11:46,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:11:46,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038437653] [2023-11-17 15:11:46,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038437653] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:11:46,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:11:46,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:11:46,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848881921] [2023-11-17 15:11:46,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:11:46,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:11:46,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:11:46,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:11:46,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:11:46,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 192 [2023-11-17 15:11:46,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 43 transitions, 214 flow. Second operand has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 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) [2023-11-17 15:11:46,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:11:46,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 192 [2023-11-17 15:11:46,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:11:53,723 INFO L124 PetriNetUnfolderBase]: 78368/106611 cut-off events. [2023-11-17 15:11:53,723 INFO L125 PetriNetUnfolderBase]: For 122316/122316 co-relation queries the response was YES. [2023-11-17 15:11:54,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 299970 conditions, 106611 events. 78368/106611 cut-off events. For 122316/122316 co-relation queries the response was YES. Maximal size of possible extension queue 6232. Compared 756410 event pairs, 34508 based on Foata normal form. 0/87014 useless extension candidates. Maximal degree in co-relation 165633. Up to 72725 conditions per place. [2023-11-17 15:11:54,472 INFO L140 encePairwiseOnDemand]: 184/192 looper letters, 50 selfloop transitions, 21 changer transitions 0/74 dead transitions. [2023-11-17 15:11:54,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 74 transitions, 511 flow [2023-11-17 15:11:54,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:11:54,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:11:54,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 253 transitions. [2023-11-17 15:11:54,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392361111111111 [2023-11-17 15:11:54,474 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 253 transitions. [2023-11-17 15:11:54,474 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 253 transitions. [2023-11-17 15:11:54,474 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:11:54,474 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 253 transitions. [2023-11-17 15:11:54,475 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 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) [2023-11-17 15:11:54,476 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 192.0) internal successors, (768), 4 states have internal predecessors, (768), 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) [2023-11-17 15:11:54,476 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 192.0) internal successors, (768), 4 states have internal predecessors, (768), 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) [2023-11-17 15:11:54,476 INFO L175 Difference]: Start difference. First operand has 47 places, 43 transitions, 214 flow. Second operand 3 states and 253 transitions. [2023-11-17 15:11:54,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 74 transitions, 511 flow [2023-11-17 15:11:54,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 74 transitions, 507 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 15:11:54,938 INFO L231 Difference]: Finished difference. Result has 50 places, 60 transitions, 434 flow [2023-11-17 15:11:54,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=434, PETRI_PLACES=50, PETRI_TRANSITIONS=60} [2023-11-17 15:11:54,939 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 7 predicate places. [2023-11-17 15:11:54,939 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 60 transitions, 434 flow [2023-11-17 15:11:54,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 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) [2023-11-17 15:11:54,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:11:54,939 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:11:54,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2023-11-17 15:11:54,939 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2023-11-17 15:11:54,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:11:54,940 INFO L85 PathProgramCache]: Analyzing trace with hash -173363731, now seen corresponding path program 1 times [2023-11-17 15:11:54,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:11:54,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369118215] [2023-11-17 15:11:54,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:11:54,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:11:54,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:11:55,017 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-17 15:11:55,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:11:55,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369118215] [2023-11-17 15:11:55,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369118215] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:11:55,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:11:55,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 15:11:55,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694563646] [2023-11-17 15:11:55,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:11:55,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 15:11:55,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:11:55,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 15:11:55,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 15:11:55,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 192 [2023-11-17 15:11:55,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 60 transitions, 434 flow. Second operand has 4 states, 4 states have (on average 72.0) internal successors, (288), 4 states have internal predecessors, (288), 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) [2023-11-17 15:11:55,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:11:55,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 192 [2023-11-17 15:11:55,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:12:02,270 INFO L124 PetriNetUnfolderBase]: 63123/83371 cut-off events. [2023-11-17 15:12:02,271 INFO L125 PetriNetUnfolderBase]: For 146317/146317 co-relation queries the response was YES. [2023-11-17 15:12:02,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 289713 conditions, 83371 events. 63123/83371 cut-off events. For 146317/146317 co-relation queries the response was YES. Maximal size of possible extension queue 5044. Compared 553066 event pairs, 11449 based on Foata normal form. 4008/74526 useless extension candidates. Maximal degree in co-relation 157037. Up to 66634 conditions per place. [2023-11-17 15:12:02,891 INFO L140 encePairwiseOnDemand]: 190/192 looper letters, 82 selfloop transitions, 4 changer transitions 0/89 dead transitions. [2023-11-17 15:12:02,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 89 transitions, 785 flow [2023-11-17 15:12:02,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:12:02,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:12:02,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 251 transitions. [2023-11-17 15:12:02,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4357638888888889 [2023-11-17 15:12:02,893 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 251 transitions. [2023-11-17 15:12:02,893 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 251 transitions. [2023-11-17 15:12:02,893 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:12:02,893 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 251 transitions. [2023-11-17 15:12:02,894 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 83.66666666666667) internal successors, (251), 3 states have internal predecessors, (251), 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) [2023-11-17 15:12:02,894 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 192.0) internal successors, (768), 4 states have internal predecessors, (768), 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) [2023-11-17 15:12:02,895 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 192.0) internal successors, (768), 4 states have internal predecessors, (768), 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) [2023-11-17 15:12:02,895 INFO L175 Difference]: Start difference. First operand has 50 places, 60 transitions, 434 flow. Second operand 3 states and 251 transitions. [2023-11-17 15:12:02,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 89 transitions, 785 flow [2023-11-17 15:12:03,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 89 transitions, 743 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-17 15:12:03,238 INFO L231 Difference]: Finished difference. Result has 49 places, 59 transitions, 396 flow [2023-11-17 15:12:03,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=396, PETRI_PLACES=49, PETRI_TRANSITIONS=59} [2023-11-17 15:12:03,239 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 6 predicate places. [2023-11-17 15:12:03,239 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 59 transitions, 396 flow [2023-11-17 15:12:03,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.0) internal successors, (288), 4 states have internal predecessors, (288), 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) [2023-11-17 15:12:03,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:12:03,239 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:12:03,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2023-11-17 15:12:03,239 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2023-11-17 15:12:03,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:12:03,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1694206217, now seen corresponding path program 1 times [2023-11-17 15:12:03,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:12:03,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217902618] [2023-11-17 15:12:03,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:12:03,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:12:03,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:12:03,259 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-17 15:12:03,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:12:03,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217902618] [2023-11-17 15:12:03,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217902618] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:12:03,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:12:03,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:12:03,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274918530] [2023-11-17 15:12:03,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:12:03,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:12:03,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:12:03,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:12:03,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:12:03,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 192 [2023-11-17 15:12:03,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 59 transitions, 396 flow. Second operand has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 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) [2023-11-17 15:12:03,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:12:03,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 192 [2023-11-17 15:12:03,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:12:12,320 INFO L124 PetriNetUnfolderBase]: 82894/114621 cut-off events. [2023-11-17 15:12:12,320 INFO L125 PetriNetUnfolderBase]: For 227626/227626 co-relation queries the response was YES. [2023-11-17 15:12:12,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 370998 conditions, 114621 events. 82894/114621 cut-off events. For 227626/227626 co-relation queries the response was YES. Maximal size of possible extension queue 7139. Compared 853272 event pairs, 32594 based on Foata normal form. 0/98741 useless extension candidates. Maximal degree in co-relation 214960. Up to 78927 conditions per place. [2023-11-17 15:12:13,360 INFO L140 encePairwiseOnDemand]: 184/192 looper letters, 61 selfloop transitions, 37 changer transitions 0/101 dead transitions. [2023-11-17 15:12:13,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 101 transitions, 882 flow [2023-11-17 15:12:13,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:12:13,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:12:13,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 250 transitions. [2023-11-17 15:12:13,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4340277777777778 [2023-11-17 15:12:13,362 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 250 transitions. [2023-11-17 15:12:13,362 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 250 transitions. [2023-11-17 15:12:13,362 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:12:13,362 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 250 transitions. [2023-11-17 15:12:13,362 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 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) [2023-11-17 15:12:13,363 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 192.0) internal successors, (768), 4 states have internal predecessors, (768), 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) [2023-11-17 15:12:13,363 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 192.0) internal successors, (768), 4 states have internal predecessors, (768), 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) [2023-11-17 15:12:13,363 INFO L175 Difference]: Start difference. First operand has 49 places, 59 transitions, 396 flow. Second operand 3 states and 250 transitions. [2023-11-17 15:12:13,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 101 transitions, 882 flow [2023-11-17 15:12:13,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 101 transitions, 874 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 15:12:13,779 INFO L231 Difference]: Finished difference. Result has 52 places, 88 transitions, 838 flow [2023-11-17 15:12:13,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=392, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=838, PETRI_PLACES=52, PETRI_TRANSITIONS=88} [2023-11-17 15:12:13,779 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 9 predicate places. [2023-11-17 15:12:13,779 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 88 transitions, 838 flow [2023-11-17 15:12:13,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 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) [2023-11-17 15:12:13,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:12:13,779 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:12:13,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2023-11-17 15:12:13,780 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2023-11-17 15:12:13,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:12:13,780 INFO L85 PathProgramCache]: Analyzing trace with hash 980789642, now seen corresponding path program 1 times [2023-11-17 15:12:13,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:12:13,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647313892] [2023-11-17 15:12:13,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:12:13,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:12:13,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:12:13,809 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-17 15:12:13,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:12:13,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647313892] [2023-11-17 15:12:13,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647313892] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:12:13,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:12:13,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 15:12:13,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669312223] [2023-11-17 15:12:13,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:12:13,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 15:12:13,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:12:13,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 15:12:13,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 15:12:13,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 192 [2023-11-17 15:12:13,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 88 transitions, 838 flow. Second operand has 4 states, 4 states have (on average 72.25) internal successors, (289), 4 states have internal predecessors, (289), 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) [2023-11-17 15:12:13,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:12:13,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 192 [2023-11-17 15:12:13,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:12:20,987 INFO L124 PetriNetUnfolderBase]: 66491/89377 cut-off events. [2023-11-17 15:12:20,988 INFO L125 PetriNetUnfolderBase]: For 250055/250055 co-relation queries the response was YES. [2023-11-17 15:12:21,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 352970 conditions, 89377 events. 66491/89377 cut-off events. For 250055/250055 co-relation queries the response was YES. Maximal size of possible extension queue 5781. Compared 625939 event pairs, 13367 based on Foata normal form. 4542/84563 useless extension candidates. Maximal degree in co-relation 208164. Up to 70760 conditions per place. [2023-11-17 15:12:21,892 INFO L140 encePairwiseOnDemand]: 190/192 looper letters, 117 selfloop transitions, 8 changer transitions 0/128 dead transitions. [2023-11-17 15:12:21,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 128 transitions, 1424 flow [2023-11-17 15:12:21,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:12:21,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:12:21,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 248 transitions. [2023-11-17 15:12:21,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4305555555555556 [2023-11-17 15:12:21,896 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 248 transitions. [2023-11-17 15:12:21,896 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 248 transitions. [2023-11-17 15:12:21,896 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:12:21,896 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 248 transitions. [2023-11-17 15:12:21,913 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 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) [2023-11-17 15:12:21,914 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 192.0) internal successors, (768), 4 states have internal predecessors, (768), 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) [2023-11-17 15:12:21,914 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 192.0) internal successors, (768), 4 states have internal predecessors, (768), 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) [2023-11-17 15:12:21,914 INFO L175 Difference]: Start difference. First operand has 52 places, 88 transitions, 838 flow. Second operand 3 states and 248 transitions. [2023-11-17 15:12:21,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 128 transitions, 1424 flow [2023-11-17 15:12:22,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 128 transitions, 1350 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-17 15:12:22,580 INFO L231 Difference]: Finished difference. Result has 51 places, 87 transitions, 776 flow [2023-11-17 15:12:22,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=760, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=776, PETRI_PLACES=51, PETRI_TRANSITIONS=87} [2023-11-17 15:12:22,581 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 8 predicate places. [2023-11-17 15:12:22,581 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 87 transitions, 776 flow [2023-11-17 15:12:22,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.25) internal successors, (289), 4 states have internal predecessors, (289), 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) [2023-11-17 15:12:22,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:12:22,581 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:12:22,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2023-11-17 15:12:22,583 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2023-11-17 15:12:22,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:12:22,584 INFO L85 PathProgramCache]: Analyzing trace with hash -343661132, now seen corresponding path program 1 times [2023-11-17 15:12:22,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:12:22,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875942018] [2023-11-17 15:12:22,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:12:22,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:12:22,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:12:22,611 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-17 15:12:22,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:12:22,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875942018] [2023-11-17 15:12:22,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875942018] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:12:22,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:12:22,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:12:22,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135076410] [2023-11-17 15:12:22,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:12:22,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:12:22,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:12:22,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:12:22,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:12:22,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 192 [2023-11-17 15:12:22,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 87 transitions, 776 flow. Second operand has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 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) [2023-11-17 15:12:22,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:12:22,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 192 [2023-11-17 15:12:22,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:12:31,643 INFO L124 PetriNetUnfolderBase]: 83744/117939 cut-off events. [2023-11-17 15:12:31,643 INFO L125 PetriNetUnfolderBase]: For 364013/364013 co-relation queries the response was YES. [2023-11-17 15:12:32,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 435542 conditions, 117939 events. 83744/117939 cut-off events. For 364013/364013 co-relation queries the response was YES. Maximal size of possible extension queue 7940. Compared 919483 event pairs, 30074 based on Foata normal form. 0/107362 useless extension candidates. Maximal degree in co-relation 244499. Up to 82253 conditions per place. [2023-11-17 15:12:32,712 INFO L140 encePairwiseOnDemand]: 184/192 looper letters, 80 selfloop transitions, 65 changer transitions 0/148 dead transitions. [2023-11-17 15:12:32,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 148 transitions, 1633 flow [2023-11-17 15:12:32,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:12:32,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:12:32,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 247 transitions. [2023-11-17 15:12:32,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4288194444444444 [2023-11-17 15:12:32,714 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 247 transitions. [2023-11-17 15:12:32,714 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 247 transitions. [2023-11-17 15:12:32,714 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:12:32,714 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 247 transitions. [2023-11-17 15:12:32,714 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 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) [2023-11-17 15:12:32,715 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 192.0) internal successors, (768), 4 states have internal predecessors, (768), 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) [2023-11-17 15:12:32,715 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 192.0) internal successors, (768), 4 states have internal predecessors, (768), 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) [2023-11-17 15:12:32,715 INFO L175 Difference]: Start difference. First operand has 51 places, 87 transitions, 776 flow. Second operand 3 states and 247 transitions. [2023-11-17 15:12:32,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 148 transitions, 1633 flow [2023-11-17 15:12:33,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 148 transitions, 1617 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 15:12:33,335 INFO L231 Difference]: Finished difference. Result has 54 places, 136 transitions, 1642 flow [2023-11-17 15:12:33,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=768, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1642, PETRI_PLACES=54, PETRI_TRANSITIONS=136} [2023-11-17 15:12:33,336 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 11 predicate places. [2023-11-17 15:12:33,336 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 136 transitions, 1642 flow [2023-11-17 15:12:33,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 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) [2023-11-17 15:12:33,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:12:33,337 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:12:33,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2023-11-17 15:12:33,337 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2023-11-17 15:12:33,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:12:33,337 INFO L85 PathProgramCache]: Analyzing trace with hash -2063555673, now seen corresponding path program 1 times [2023-11-17 15:12:33,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:12:33,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651034832] [2023-11-17 15:12:33,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:12:33,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:12:33,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:12:33,367 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-17 15:12:33,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:12:33,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651034832] [2023-11-17 15:12:33,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651034832] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:12:33,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:12:33,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 15:12:33,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367443144] [2023-11-17 15:12:33,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:12:33,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 15:12:33,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:12:33,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 15:12:33,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 15:12:33,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 192 [2023-11-17 15:12:33,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 136 transitions, 1642 flow. Second operand has 4 states, 4 states have (on average 72.5) internal successors, (290), 4 states have internal predecessors, (290), 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) [2023-11-17 15:12:33,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:12:33,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 192 [2023-11-17 15:12:33,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:12:41,551 INFO L124 PetriNetUnfolderBase]: 67349/92869 cut-off events. [2023-11-17 15:12:41,551 INFO L125 PetriNetUnfolderBase]: For 385005/385005 co-relation queries the response was YES. [2023-11-17 15:12:41,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 412143 conditions, 92869 events. 67349/92869 cut-off events. For 385005/385005 co-relation queries the response was YES. Maximal size of possible extension queue 6428. Compared 686933 event pairs, 15691 based on Foata normal form. 4796/92908 useless extension candidates. Maximal degree in co-relation 225609. Up to 70802 conditions per place. [2023-11-17 15:12:42,306 INFO L140 encePairwiseOnDemand]: 190/192 looper letters, 175 selfloop transitions, 16 changer transitions 0/194 dead transitions. [2023-11-17 15:12:42,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 194 transitions, 2661 flow [2023-11-17 15:12:42,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:12:42,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:12:42,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 245 transitions. [2023-11-17 15:12:42,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4253472222222222 [2023-11-17 15:12:42,307 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 245 transitions. [2023-11-17 15:12:42,307 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 245 transitions. [2023-11-17 15:12:42,307 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:12:42,307 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 245 transitions. [2023-11-17 15:12:42,308 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 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) [2023-11-17 15:12:42,308 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 192.0) internal successors, (768), 4 states have internal predecessors, (768), 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) [2023-11-17 15:12:42,308 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 192.0) internal successors, (768), 4 states have internal predecessors, (768), 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) [2023-11-17 15:12:42,308 INFO L175 Difference]: Start difference. First operand has 54 places, 136 transitions, 1642 flow. Second operand 3 states and 245 transitions. [2023-11-17 15:12:42,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 194 transitions, 2661 flow [2023-11-17 15:12:42,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 194 transitions, 2531 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-17 15:12:42,955 INFO L231 Difference]: Finished difference. Result has 53 places, 135 transitions, 1540 flow [2023-11-17 15:12:42,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=1508, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1540, PETRI_PLACES=53, PETRI_TRANSITIONS=135} [2023-11-17 15:12:42,956 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 10 predicate places. [2023-11-17 15:12:42,956 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 135 transitions, 1540 flow [2023-11-17 15:12:42,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.5) internal successors, (290), 4 states have internal predecessors, (290), 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) [2023-11-17 15:12:42,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:12:42,956 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:12:42,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2023-11-17 15:12:42,956 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2023-11-17 15:12:42,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:12:42,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1876530288, now seen corresponding path program 1 times [2023-11-17 15:12:42,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:12:42,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034101608] [2023-11-17 15:12:42,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:12:42,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:12:42,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:12:42,976 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-11-17 15:12:42,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:12:42,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034101608] [2023-11-17 15:12:42,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034101608] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:12:42,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:12:42,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:12:42,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98333188] [2023-11-17 15:12:42,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:12:42,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:12:42,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:12:42,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:12:42,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:12:42,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 192 [2023-11-17 15:12:42,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 135 transitions, 1540 flow. Second operand has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 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) [2023-11-17 15:12:42,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:12:42,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 192 [2023-11-17 15:12:42,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:12:53,715 INFO L124 PetriNetUnfolderBase]: 78886/114494 cut-off events. [2023-11-17 15:12:53,715 INFO L125 PetriNetUnfolderBase]: For 491117/491117 co-relation queries the response was YES. [2023-11-17 15:12:54,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 476441 conditions, 114494 events. 78886/114494 cut-off events. For 491117/491117 co-relation queries the response was YES. Maximal size of possible extension queue 8549. Compared 940382 event pairs, 27980 based on Foata normal form. 0/110250 useless extension candidates. Maximal degree in co-relation 271477. Up to 83371 conditions per place. [2023-11-17 15:12:54,699 INFO L140 encePairwiseOnDemand]: 184/192 looper letters, 111 selfloop transitions, 113 changer transitions 0/227 dead transitions. [2023-11-17 15:12:54,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 227 transitions, 3088 flow [2023-11-17 15:12:54,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:12:54,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:12:54,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 244 transitions. [2023-11-17 15:12:54,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4236111111111111 [2023-11-17 15:12:54,700 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 244 transitions. [2023-11-17 15:12:54,700 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 244 transitions. [2023-11-17 15:12:54,700 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:12:54,701 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 244 transitions. [2023-11-17 15:12:54,701 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 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) [2023-11-17 15:12:54,701 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 192.0) internal successors, (768), 4 states have internal predecessors, (768), 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) [2023-11-17 15:12:54,702 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 192.0) internal successors, (768), 4 states have internal predecessors, (768), 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) [2023-11-17 15:12:54,702 INFO L175 Difference]: Start difference. First operand has 53 places, 135 transitions, 1540 flow. Second operand 3 states and 244 transitions. [2023-11-17 15:12:54,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 227 transitions, 3088 flow [2023-11-17 15:12:55,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 227 transitions, 3056 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 15:12:55,734 INFO L231 Difference]: Finished difference. Result has 56 places, 216 transitions, 3182 flow [2023-11-17 15:12:55,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=1524, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=3182, PETRI_PLACES=56, PETRI_TRANSITIONS=216} [2023-11-17 15:12:55,735 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 13 predicate places. [2023-11-17 15:12:55,735 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 216 transitions, 3182 flow [2023-11-17 15:12:55,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 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) [2023-11-17 15:12:55,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:12:55,735 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:12:55,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2023-11-17 15:12:55,736 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2023-11-17 15:12:55,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:12:55,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1957108763, now seen corresponding path program 1 times [2023-11-17 15:12:55,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:12:55,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077233086] [2023-11-17 15:12:55,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:12:55,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:12:55,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:12:55,774 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-11-17 15:12:55,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:12:55,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077233086] [2023-11-17 15:12:55,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077233086] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:12:55,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:12:55,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 15:12:55,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100205748] [2023-11-17 15:12:55,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:12:55,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 15:12:55,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:12:55,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 15:12:55,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 15:12:55,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 192 [2023-11-17 15:12:55,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 216 transitions, 3182 flow. Second operand has 4 states, 4 states have (on average 72.75) internal successors, (291), 4 states have internal predecessors, (291), 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) [2023-11-17 15:12:55,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:12:55,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 192 [2023-11-17 15:12:55,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:13:04,373 INFO L124 PetriNetUnfolderBase]: 65645/97131 cut-off events. [2023-11-17 15:13:04,374 INFO L125 PetriNetUnfolderBase]: For 575519/575519 co-relation queries the response was YES. [2023-11-17 15:13:04,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 460944 conditions, 97131 events. 65645/97131 cut-off events. For 575519/575519 co-relation queries the response was YES. Maximal size of possible extension queue 7103. Compared 811539 event pairs, 20879 based on Foata normal form. 4122/101131 useless extension candidates. Maximal degree in co-relation 262931. Up to 58024 conditions per place. [2023-11-17 15:13:05,256 INFO L140 encePairwiseOnDemand]: 190/192 looper letters, 266 selfloop transitions, 32 changer transitions 0/301 dead transitions. [2023-11-17 15:13:05,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 301 transitions, 4941 flow [2023-11-17 15:13:05,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:13:05,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:13:05,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 242 transitions. [2023-11-17 15:13:05,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4201388888888889 [2023-11-17 15:13:05,257 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 242 transitions. [2023-11-17 15:13:05,257 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 242 transitions. [2023-11-17 15:13:05,257 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:13:05,257 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 242 transitions. [2023-11-17 15:13:05,258 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 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) [2023-11-17 15:13:05,258 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 192.0) internal successors, (768), 4 states have internal predecessors, (768), 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) [2023-11-17 15:13:05,258 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 192.0) internal successors, (768), 4 states have internal predecessors, (768), 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) [2023-11-17 15:13:05,259 INFO L175 Difference]: Start difference. First operand has 56 places, 216 transitions, 3182 flow. Second operand 3 states and 242 transitions. [2023-11-17 15:13:05,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 301 transitions, 4941 flow [2023-11-17 15:13:06,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 301 transitions, 4715 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-17 15:13:06,309 INFO L231 Difference]: Finished difference. Result has 55 places, 215 transitions, 3016 flow [2023-11-17 15:13:06,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=2952, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=3016, PETRI_PLACES=55, PETRI_TRANSITIONS=215} [2023-11-17 15:13:06,309 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 12 predicate places. [2023-11-17 15:13:06,309 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 215 transitions, 3016 flow [2023-11-17 15:13:06,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.75) internal successors, (291), 4 states have internal predecessors, (291), 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) [2023-11-17 15:13:06,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:13:06,310 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:13:06,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2023-11-17 15:13:06,310 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2023-11-17 15:13:06,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:13:06,310 INFO L85 PathProgramCache]: Analyzing trace with hash 535900727, now seen corresponding path program 1 times [2023-11-17 15:13:06,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:13:06,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964744395] [2023-11-17 15:13:06,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:13:06,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:13:06,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:13:06,321 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:13:06,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:13:06,340 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:13:06,340 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:13:06,340 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 8 remaining) [2023-11-17 15:13:06,341 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 8 remaining) [2023-11-17 15:13:06,341 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 8 remaining) [2023-11-17 15:13:06,341 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 8 remaining) [2023-11-17 15:13:06,341 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 8 remaining) [2023-11-17 15:13:06,341 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 8 remaining) [2023-11-17 15:13:06,341 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 8 remaining) [2023-11-17 15:13:06,341 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 8 remaining) [2023-11-17 15:13:06,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2023-11-17 15:13:06,341 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:13:06,342 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:13:06,342 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2023-11-17 15:13:06,360 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:13:06,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 126 places, 119 transitions, 308 flow [2023-11-17 15:13:06,371 INFO L124 PetriNetUnfolderBase]: 15/208 cut-off events. [2023-11-17 15:13:06,371 INFO L125 PetriNetUnfolderBase]: For 77/77 co-relation queries the response was YES. [2023-11-17 15:13:06,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 251 conditions, 208 events. 15/208 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 439 event pairs, 0 based on Foata normal form. 0/178 useless extension candidates. Maximal degree in co-relation 208. Up to 16 conditions per place. [2023-11-17 15:13:06,372 INFO L82 GeneralOperation]: Start removeDead. Operand has 126 places, 119 transitions, 308 flow [2023-11-17 15:13:06,372 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 126 places, 119 transitions, 308 flow [2023-11-17 15:13:06,373 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:13:06,373 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 126 places, 119 transitions, 308 flow [2023-11-17 15:13:06,373 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 126 places, 119 transitions, 308 flow [2023-11-17 15:13:06,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 126 places, 119 transitions, 308 flow [2023-11-17 15:13:06,383 INFO L124 PetriNetUnfolderBase]: 15/208 cut-off events. [2023-11-17 15:13:06,383 INFO L125 PetriNetUnfolderBase]: For 77/77 co-relation queries the response was YES. [2023-11-17 15:13:06,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 251 conditions, 208 events. 15/208 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 439 event pairs, 0 based on Foata normal form. 0/178 useless extension candidates. Maximal degree in co-relation 208. Up to 16 conditions per place. [2023-11-17 15:13:06,388 INFO L119 LiptonReduction]: Number of co-enabled transitions 8904 [2023-11-17 15:13:08,042 INFO L134 LiptonReduction]: Checked pairs total: 17571 [2023-11-17 15:13:08,042 INFO L136 LiptonReduction]: Total number of compositions: 109 [2023-11-17 15:13:08,043 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:13:08,044 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=LoopHeads, 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;@7144ba59, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:13:08,044 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2023-11-17 15:13:08,044 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:13:08,045 INFO L124 PetriNetUnfolderBase]: 1/9 cut-off events. [2023-11-17 15:13:08,045 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:13:08,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:13:08,045 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-17 15:13:08,045 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2023-11-17 15:13:08,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:13:08,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1174460950, now seen corresponding path program 1 times [2023-11-17 15:13:08,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:13:08,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579364008] [2023-11-17 15:13:08,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:13:08,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:13:08,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:13:08,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:13:08,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:13:08,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579364008] [2023-11-17 15:13:08,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579364008] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:13:08,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:13:08,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:13:08,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065451707] [2023-11-17 15:13:08,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:13:08,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:13:08,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:13:08,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:13:08,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:13:08,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 228 [2023-11-17 15:13:08,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 39 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 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) [2023-11-17 15:13:08,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:13:08,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 228 [2023-11-17 15:13:08,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:13:33,262 INFO L124 PetriNetUnfolderBase]: 297494/377965 cut-off events. [2023-11-17 15:13:33,263 INFO L125 PetriNetUnfolderBase]: For 287847/287847 co-relation queries the response was YES. [2023-11-17 15:13:34,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 803665 conditions, 377965 events. 297494/377965 cut-off events. For 287847/287847 co-relation queries the response was YES. Maximal size of possible extension queue 16101. Compared 2473521 event pairs, 176580 based on Foata normal form. 0/272848 useless extension candidates. Maximal degree in co-relation 176041. Up to 254687 conditions per place. [2023-11-17 15:13:35,684 INFO L140 encePairwiseOnDemand]: 213/228 looper letters, 48 selfloop transitions, 8 changer transitions 0/59 dead transitions. [2023-11-17 15:13:35,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 59 transitions, 360 flow [2023-11-17 15:13:35,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:13:35,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:13:35,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 302 transitions. [2023-11-17 15:13:35,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4415204678362573 [2023-11-17 15:13:35,685 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 302 transitions. [2023-11-17 15:13:35,686 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 302 transitions. [2023-11-17 15:13:35,686 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:13:35,686 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 302 transitions. [2023-11-17 15:13:35,686 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 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) [2023-11-17 15:13:35,687 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 228.0) internal successors, (912), 4 states have internal predecessors, (912), 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) [2023-11-17 15:13:35,687 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 228.0) internal successors, (912), 4 states have internal predecessors, (912), 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) [2023-11-17 15:13:35,687 INFO L175 Difference]: Start difference. First operand has 49 places, 39 transitions, 148 flow. Second operand 3 states and 302 transitions. [2023-11-17 15:13:35,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 59 transitions, 360 flow [2023-11-17 15:13:35,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 59 transitions, 300 flow, removed 30 selfloop flow, removed 0 redundant places. [2023-11-17 15:13:35,799 INFO L231 Difference]: Finished difference. Result has 52 places, 40 transitions, 168 flow [2023-11-17 15:13:35,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=168, PETRI_PLACES=52, PETRI_TRANSITIONS=40} [2023-11-17 15:13:35,799 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 3 predicate places. [2023-11-17 15:13:35,799 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 40 transitions, 168 flow [2023-11-17 15:13:35,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 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) [2023-11-17 15:13:35,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:13:35,800 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:13:35,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2023-11-17 15:13:35,800 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2023-11-17 15:13:35,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:13:35,800 INFO L85 PathProgramCache]: Analyzing trace with hash -263850635, now seen corresponding path program 1 times [2023-11-17 15:13:35,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:13:35,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846945827] [2023-11-17 15:13:35,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:13:35,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:13:35,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:13:35,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 15:13:35,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:13:35,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846945827] [2023-11-17 15:13:35,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846945827] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:13:35,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:13:35,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:13:35,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375917611] [2023-11-17 15:13:35,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:13:35,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:13:35,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:13:35,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:13:35,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:13:35,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 228 [2023-11-17 15:13:35,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 40 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 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) [2023-11-17 15:13:35,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:13:35,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 228 [2023-11-17 15:13:35,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:14:16,622 INFO L124 PetriNetUnfolderBase]: 423576/541309 cut-off events. [2023-11-17 15:14:16,622 INFO L125 PetriNetUnfolderBase]: For 415204/415204 co-relation queries the response was YES. [2023-11-17 15:14:18,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1359115 conditions, 541309 events. 423576/541309 cut-off events. For 415204/415204 co-relation queries the response was YES. Maximal size of possible extension queue 23989. Compared 3732015 event pairs, 215810 based on Foata normal form. 0/413115 useless extension candidates. Maximal degree in co-relation 641332. Up to 370121 conditions per place. [2023-11-17 15:14:22,531 INFO L140 encePairwiseOnDemand]: 219/228 looper letters, 54 selfloop transitions, 14 changer transitions 0/71 dead transitions. [2023-11-17 15:14:22,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 71 transitions, 433 flow [2023-11-17 15:14:22,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:14:22,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:14:22,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 290 transitions. [2023-11-17 15:14:22,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4239766081871345 [2023-11-17 15:14:22,533 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 290 transitions. [2023-11-17 15:14:22,534 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 290 transitions. [2023-11-17 15:14:22,534 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:14:22,534 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 290 transitions. [2023-11-17 15:14:22,537 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 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) [2023-11-17 15:14:22,538 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 228.0) internal successors, (912), 4 states have internal predecessors, (912), 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) [2023-11-17 15:14:22,538 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 228.0) internal successors, (912), 4 states have internal predecessors, (912), 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) [2023-11-17 15:14:22,538 INFO L175 Difference]: Start difference. First operand has 52 places, 40 transitions, 168 flow. Second operand 3 states and 290 transitions. [2023-11-17 15:14:22,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 71 transitions, 433 flow