/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-ext/45_monabsex1_vs.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-23 22:53:30,115 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-23 22:53:30,170 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-23 22:53:30,176 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-23 22:53:30,177 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-23 22:53:30,203 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-23 22:53:30,204 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-23 22:53:30,204 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-23 22:53:30,204 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-23 22:53:30,207 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-23 22:53:30,207 INFO L153 SettingsManager]: * Use SBE=true [2023-08-23 22:53:30,207 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-23 22:53:30,207 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-23 22:53:30,208 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-23 22:53:30,208 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-23 22:53:30,209 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-23 22:53:30,209 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-23 22:53:30,209 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-23 22:53:30,209 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-23 22:53:30,209 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-23 22:53:30,209 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-23 22:53:30,210 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-23 22:53:30,210 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-23 22:53:30,210 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-23 22:53:30,210 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-23 22:53:30,211 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-23 22:53:30,211 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-23 22:53:30,211 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-23 22:53:30,211 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-23 22:53:30,211 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-23 22:53:30,212 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-23 22:53:30,212 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-23 22:53:30,212 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-23 22:53:30,212 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-23 22:53:30,212 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-23 22:53:30,213 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-08-23 22:53:30,428 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-23 22:53:30,444 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-23 22:53:30,445 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-23 22:53:30,446 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-23 22:53:30,448 INFO L274 PluginConnector]: CDTParser initialized [2023-08-23 22:53:30,449 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/45_monabsex1_vs.i [2023-08-23 22:53:31,461 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-23 22:53:31,714 INFO L384 CDTParser]: Found 1 translation units. [2023-08-23 22:53:31,715 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/45_monabsex1_vs.i [2023-08-23 22:53:31,726 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/673c83bee/e5b2055e06c444c79da5e91b72f678a1/FLAGeb4275298 [2023-08-23 22:53:31,739 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/673c83bee/e5b2055e06c444c79da5e91b72f678a1 [2023-08-23 22:53:31,743 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-23 22:53:31,744 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-23 22:53:31,746 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-23 22:53:31,746 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-23 22:53:31,747 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-23 22:53:31,748 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.08 10:53:31" (1/1) ... [2023-08-23 22:53:31,749 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34ce6a40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:53:31, skipping insertion in model container [2023-08-23 22:53:31,749 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.08 10:53:31" (1/1) ... [2023-08-23 22:53:31,784 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-23 22:53:31,919 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-23 22:53:32,007 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] [2023-08-23 22:53:32,012 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-23 22:53:32,019 INFO L201 MainTranslator]: Completed pre-run [2023-08-23 22:53:32,038 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-23 22:53:32,042 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [266] [2023-08-23 22:53:32,043 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [266] [2023-08-23 22:53:32,050 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] [2023-08-23 22:53:32,051 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-23 22:53:32,073 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-23 22:53:32,073 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-23 22:53:32,073 WARN L669 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-08-23 22:53:32,080 INFO L206 MainTranslator]: Completed translation [2023-08-23 22:53:32,080 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:53:32 WrapperNode [2023-08-23 22:53:32,080 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-23 22:53:32,081 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-23 22:53:32,081 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-23 22:53:32,081 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-23 22:53:32,085 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:53:32" (1/1) ... [2023-08-23 22:53:32,109 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:53:32" (1/1) ... [2023-08-23 22:53:32,121 INFO L138 Inliner]: procedures = 171, calls = 15, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 27 [2023-08-23 22:53:32,122 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-23 22:53:32,122 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-23 22:53:32,122 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-23 22:53:32,122 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-23 22:53:32,127 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:53:32" (1/1) ... [2023-08-23 22:53:32,127 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:53:32" (1/1) ... [2023-08-23 22:53:32,131 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:53:32" (1/1) ... [2023-08-23 22:53:32,131 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:53:32" (1/1) ... [2023-08-23 22:53:32,139 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:53:32" (1/1) ... [2023-08-23 22:53:32,141 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:53:32" (1/1) ... [2023-08-23 22:53:32,141 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:53:32" (1/1) ... [2023-08-23 22:53:32,142 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:53:32" (1/1) ... [2023-08-23 22:53:32,143 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-23 22:53:32,144 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-23 22:53:32,144 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-23 22:53:32,144 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-23 22:53:32,144 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:53:32" (1/1) ... [2023-08-23 22:53:32,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-23 22:53:32,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-23 22:53:32,168 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-23 22:53:32,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-23 22:53:32,192 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-23 22:53:32,192 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-23 22:53:32,192 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-23 22:53:32,193 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-23 22:53:32,193 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-23 22:53:32,193 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-23 22:53:32,193 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-23 22:53:32,193 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-23 22:53:32,193 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-23 22:53:32,193 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-23 22:53:32,193 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-23 22:53:32,194 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-23 22:53:32,307 INFO L236 CfgBuilder]: Building ICFG [2023-08-23 22:53:32,309 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-23 22:53:32,416 INFO L277 CfgBuilder]: Performing block encoding [2023-08-23 22:53:32,425 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-23 22:53:32,426 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-08-23 22:53:32,427 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.08 10:53:32 BoogieIcfgContainer [2023-08-23 22:53:32,427 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-23 22:53:32,429 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-23 22:53:32,429 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-23 22:53:32,430 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-23 22:53:32,431 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.08 10:53:31" (1/3) ... [2023-08-23 22:53:32,431 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bb9c576 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.08 10:53:32, skipping insertion in model container [2023-08-23 22:53:32,431 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:53:32" (2/3) ... [2023-08-23 22:53:32,431 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bb9c576 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.08 10:53:32, skipping insertion in model container [2023-08-23 22:53:32,431 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.08 10:53:32" (3/3) ... [2023-08-23 22:53:32,432 INFO L112 eAbstractionObserver]: Analyzing ICFG 45_monabsex1_vs.i [2023-08-23 22:53:32,443 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-23 22:53:32,443 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-23 22:53:32,443 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-23 22:53:32,483 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-23 22:53:32,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 42 places, 40 transitions, 85 flow [2023-08-23 22:53:32,540 INFO L124 PetriNetUnfolderBase]: 2/50 cut-off events. [2023-08-23 22:53:32,540 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-23 22:53:32,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55 conditions, 50 events. 2/50 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 47 event pairs, 0 based on Foata normal form. 0/45 useless extension candidates. Maximal degree in co-relation 25. Up to 4 conditions per place. [2023-08-23 22:53:32,544 INFO L82 GeneralOperation]: Start removeDead. Operand has 42 places, 40 transitions, 85 flow [2023-08-23 22:53:32,546 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 40 transitions, 85 flow [2023-08-23 22:53:32,549 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-23 22:53:32,557 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 42 places, 40 transitions, 85 flow [2023-08-23 22:53:32,562 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 42 places, 40 transitions, 85 flow [2023-08-23 22:53:32,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 42 places, 40 transitions, 85 flow [2023-08-23 22:53:32,584 INFO L124 PetriNetUnfolderBase]: 2/50 cut-off events. [2023-08-23 22:53:32,584 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-23 22:53:32,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55 conditions, 50 events. 2/50 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 47 event pairs, 0 based on Foata normal form. 0/45 useless extension candidates. Maximal degree in co-relation 25. Up to 4 conditions per place. [2023-08-23 22:53:32,586 INFO L119 LiptonReduction]: Number of co-enabled transitions 286 [2023-08-23 22:53:33,335 INFO L134 LiptonReduction]: Checked pairs total: 243 [2023-08-23 22:53:33,335 INFO L136 LiptonReduction]: Total number of compositions: 37 [2023-08-23 22:53:33,343 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-23 22:53:33,347 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@50c9017a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-23 22:53:33,347 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-23 22:53:33,349 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-23 22:53:33,349 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2023-08-23 22:53:33,349 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-23 22:53:33,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:53:33,349 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-23 22:53:33,350 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-23 22:53:33,352 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:53:33,353 INFO L85 PathProgramCache]: Analyzing trace with hash 5500569, now seen corresponding path program 1 times [2023-08-23 22:53:33,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:53:33,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163593714] [2023-08-23 22:53:33,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:53:33,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:53:33,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:53:33,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:53:33,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:53:33,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163593714] [2023-08-23 22:53:33,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163593714] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:53:33,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:53:33,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-23 22:53:33,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136383748] [2023-08-23 22:53:33,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:53:33,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-23 22:53:33,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:53:33,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-23 22:53:33,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-23 22:53:33,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 77 [2023-08-23 22:53:33,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 11 places, 8 transitions, 21 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) [2023-08-23 22:53:33,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:53:33,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 77 [2023-08-23 22:53:33,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:53:33,497 INFO L124 PetriNetUnfolderBase]: 2/12 cut-off events. [2023-08-23 22:53:33,497 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-23 22:53:33,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 12 events. 2/12 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 10 event pairs, 2 based on Foata normal form. 0/12 useless extension candidates. Maximal degree in co-relation 14. Up to 11 conditions per place. [2023-08-23 22:53:33,498 INFO L140 encePairwiseOnDemand]: 75/77 looper letters, 5 selfloop transitions, 0 changer transitions 0/6 dead transitions. [2023-08-23 22:53:33,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 10 places, 6 transitions, 27 flow [2023-08-23 22:53:33,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-23 22:53:33,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-23 22:53:33,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 77 transitions. [2023-08-23 22:53:33,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-08-23 22:53:33,512 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 77 transitions. [2023-08-23 22:53:33,512 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 77 transitions. [2023-08-23 22:53:33,513 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:53:33,514 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 77 transitions. [2023-08-23 22:53:33,515 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) [2023-08-23 22:53:33,517 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:53:33,517 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:53:33,518 INFO L175 Difference]: Start difference. First operand has 11 places, 8 transitions, 21 flow. Second operand 2 states and 77 transitions. [2023-08-23 22:53:33,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 10 places, 6 transitions, 27 flow [2023-08-23 22:53:33,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 10 places, 6 transitions, 27 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-23 22:53:33,523 INFO L231 Difference]: Finished difference. Result has 10 places, 6 transitions, 17 flow [2023-08-23 22:53:33,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=17, 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=17, PETRI_PLACES=10, PETRI_TRANSITIONS=6} [2023-08-23 22:53:33,527 INFO L281 CegarLoopForPetriNet]: 11 programPoint places, -1 predicate places. [2023-08-23 22:53:33,528 INFO L495 AbstractCegarLoop]: Abstraction has has 10 places, 6 transitions, 17 flow [2023-08-23 22:53:33,528 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) [2023-08-23 22:53:33,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:53:33,529 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-23 22:53:33,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-23 22:53:33,529 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-23 22:53:33,536 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:53:33,536 INFO L85 PathProgramCache]: Analyzing trace with hash 991068589, now seen corresponding path program 1 times [2023-08-23 22:53:33,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:53:33,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433346777] [2023-08-23 22:53:33,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:53:33,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:53:33,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-23 22:53:33,561 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-23 22:53:33,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-23 22:53:33,601 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-23 22:53:33,601 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-23 22:53:33,602 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-23 22:53:33,603 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-08-23 22:53:33,603 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-08-23 22:53:33,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-23 22:53:33,604 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-23 22:53:33,606 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-23 22:53:33,606 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-23 22:53:33,623 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-23 22:53:33,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 56 places, 52 transitions, 116 flow [2023-08-23 22:53:33,645 INFO L124 PetriNetUnfolderBase]: 3/74 cut-off events. [2023-08-23 22:53:33,645 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-23 22:53:33,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84 conditions, 74 events. 3/74 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 99 event pairs, 0 based on Foata normal form. 0/66 useless extension candidates. Maximal degree in co-relation 51. Up to 6 conditions per place. [2023-08-23 22:53:33,646 INFO L82 GeneralOperation]: Start removeDead. Operand has 56 places, 52 transitions, 116 flow [2023-08-23 22:53:33,647 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 56 places, 52 transitions, 116 flow [2023-08-23 22:53:33,647 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-23 22:53:33,647 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 56 places, 52 transitions, 116 flow [2023-08-23 22:53:33,649 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 56 places, 52 transitions, 116 flow [2023-08-23 22:53:33,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 56 places, 52 transitions, 116 flow [2023-08-23 22:53:33,656 INFO L124 PetriNetUnfolderBase]: 3/74 cut-off events. [2023-08-23 22:53:33,656 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-23 22:53:33,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84 conditions, 74 events. 3/74 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 99 event pairs, 0 based on Foata normal form. 0/66 useless extension candidates. Maximal degree in co-relation 51. Up to 6 conditions per place. [2023-08-23 22:53:33,657 INFO L119 LiptonReduction]: Number of co-enabled transitions 836 [2023-08-23 22:53:34,457 INFO L134 LiptonReduction]: Checked pairs total: 1109 [2023-08-23 22:53:34,457 INFO L136 LiptonReduction]: Total number of compositions: 39 [2023-08-23 22:53:34,459 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-23 22:53:34,459 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@50c9017a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-23 22:53:34,459 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-23 22:53:34,461 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-23 22:53:34,461 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2023-08-23 22:53:34,461 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-23 22:53:34,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:53:34,461 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-23 22:53:34,461 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-23 22:53:34,462 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:53:34,462 INFO L85 PathProgramCache]: Analyzing trace with hash 269791410, now seen corresponding path program 1 times [2023-08-23 22:53:34,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:53:34,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165665847] [2023-08-23 22:53:34,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:53:34,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:53:34,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:53:34,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:53:34,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:53:34,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165665847] [2023-08-23 22:53:34,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165665847] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:53:34,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:53:34,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-23 22:53:34,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675440088] [2023-08-23 22:53:34,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:53:34,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-23 22:53:34,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:53:34,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-23 22:53:34,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-23 22:53:34,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 91 [2023-08-23 22:53:34,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 14 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) [2023-08-23 22:53:34,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:53:34,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 91 [2023-08-23 22:53:34,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:53:34,538 INFO L124 PetriNetUnfolderBase]: 42/97 cut-off events. [2023-08-23 22:53:34,538 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-23 22:53:34,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 206 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 409 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. [2023-08-23 22:53:34,540 INFO L140 encePairwiseOnDemand]: 86/91 looper letters, 13 selfloop transitions, 3 changer transitions 0/19 dead transitions. [2023-08-23 22:53:34,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 19 transitions, 87 flow [2023-08-23 22:53:34,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-23 22:53:34,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-23 22:53:34,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 133 transitions. [2023-08-23 22:53:34,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48717948717948717 [2023-08-23 22:53:34,541 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 133 transitions. [2023-08-23 22:53:34,541 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 133 transitions. [2023-08-23 22:53:34,542 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:53:34,542 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 133 transitions. [2023-08-23 22:53:34,543 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:53:34,543 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:53:34,544 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:53:34,544 INFO L175 Difference]: Start difference. First operand has 19 places, 14 transitions, 40 flow. Second operand 3 states and 133 transitions. [2023-08-23 22:53:34,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 19 transitions, 87 flow [2023-08-23 22:53:34,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 19 transitions, 85 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-23 22:53:34,545 INFO L231 Difference]: Finished difference. Result has 22 places, 15 transitions, 58 flow [2023-08-23 22:53:34,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, 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} [2023-08-23 22:53:34,545 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 3 predicate places. [2023-08-23 22:53:34,545 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 15 transitions, 58 flow [2023-08-23 22:53:34,546 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) [2023-08-23 22:53:34,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:53:34,546 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:53:34,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-23 22:53:34,546 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-23 22:53:34,546 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:53:34,546 INFO L85 PathProgramCache]: Analyzing trace with hash 859269627, now seen corresponding path program 1 times [2023-08-23 22:53:34,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:53:34,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858408567] [2023-08-23 22:53:34,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:53:34,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:53:34,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:53:34,574 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-23 22:53:34,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:53:34,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858408567] [2023-08-23 22:53:34,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858408567] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:53:34,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:53:34,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-23 22:53:34,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240782641] [2023-08-23 22:53:34,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:53:34,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-23 22:53:34,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:53:34,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-23 22:53:34,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-23 22:53:34,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 91 [2023-08-23 22:53:34,576 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) [2023-08-23 22:53:34,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:53:34,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 91 [2023-08-23 22:53:34,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:53:34,606 INFO L124 PetriNetUnfolderBase]: 33/92 cut-off events. [2023-08-23 22:53:34,606 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-23 22:53:34,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 243 conditions, 92 events. 33/92 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 387 event pairs, 18 based on Foata normal form. 0/87 useless extension candidates. Maximal degree in co-relation 98. Up to 41 conditions per place. [2023-08-23 22:53:34,607 INFO L140 encePairwiseOnDemand]: 87/91 looper letters, 12 selfloop transitions, 4 changer transitions 0/19 dead transitions. [2023-08-23 22:53:34,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 19 transitions, 104 flow [2023-08-23 22:53:34,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-23 22:53:34,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-23 22:53:34,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 129 transitions. [2023-08-23 22:53:34,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4725274725274725 [2023-08-23 22:53:34,611 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 129 transitions. [2023-08-23 22:53:34,611 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 129 transitions. [2023-08-23 22:53:34,612 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:53:34,612 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 129 transitions. [2023-08-23 22:53:34,612 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) [2023-08-23 22:53:34,613 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:53:34,613 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:53:34,613 INFO L175 Difference]: Start difference. First operand has 22 places, 15 transitions, 58 flow. Second operand 3 states and 129 transitions. [2023-08-23 22:53:34,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 19 transitions, 104 flow [2023-08-23 22:53:34,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 19 transitions, 96 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-23 22:53:34,615 INFO L231 Difference]: Finished difference. Result has 24 places, 17 transitions, 80 flow [2023-08-23 22:53:34,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, 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} [2023-08-23 22:53:34,615 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 5 predicate places. [2023-08-23 22:53:34,615 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 17 transitions, 80 flow [2023-08-23 22:53:34,615 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) [2023-08-23 22:53:34,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:53:34,616 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:53:34,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-23 22:53:34,616 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-23 22:53:34,616 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:53:34,616 INFO L85 PathProgramCache]: Analyzing trace with hash 868592532, now seen corresponding path program 1 times [2023-08-23 22:53:34,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:53:34,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821634594] [2023-08-23 22:53:34,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:53:34,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:53:34,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:53:34,671 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-23 22:53:34,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:53:34,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821634594] [2023-08-23 22:53:34,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821634594] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:53:34,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:53:34,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-23 22:53:34,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887881884] [2023-08-23 22:53:34,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:53:34,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-23 22:53:34,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:53:34,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-23 22:53:34,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-23 22:53:34,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 91 [2023-08-23 22:53:34,673 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) [2023-08-23 22:53:34,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:53:34,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 91 [2023-08-23 22:53:34,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:53:34,703 INFO L124 PetriNetUnfolderBase]: 29/78 cut-off events. [2023-08-23 22:53:34,703 INFO L125 PetriNetUnfolderBase]: For 56/56 co-relation queries the response was YES. [2023-08-23 22:53:34,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 244 conditions, 78 events. 29/78 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 304 event pairs, 6 based on Foata normal form. 0/74 useless extension candidates. Maximal degree in co-relation 192. Up to 61 conditions per place. [2023-08-23 22:53:34,704 INFO L140 encePairwiseOnDemand]: 89/91 looper letters, 14 selfloop transitions, 2 changer transitions 0/19 dead transitions. [2023-08-23 22:53:34,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 19 transitions, 121 flow [2023-08-23 22:53:34,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-23 22:53:34,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-23 22:53:34,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 128 transitions. [2023-08-23 22:53:34,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46886446886446886 [2023-08-23 22:53:34,706 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 128 transitions. [2023-08-23 22:53:34,706 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 128 transitions. [2023-08-23 22:53:34,706 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:53:34,706 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 128 transitions. [2023-08-23 22:53:34,707 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) [2023-08-23 22:53:34,707 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:53:34,707 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:53:34,707 INFO L175 Difference]: Start difference. First operand has 24 places, 17 transitions, 80 flow. Second operand 3 states and 128 transitions. [2023-08-23 22:53:34,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 19 transitions, 121 flow [2023-08-23 22:53:34,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 19 transitions, 113 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-23 22:53:34,709 INFO L231 Difference]: Finished difference. Result has 23 places, 16 transitions, 72 flow [2023-08-23 22:53:34,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, 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} [2023-08-23 22:53:34,709 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 4 predicate places. [2023-08-23 22:53:34,709 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 16 transitions, 72 flow [2023-08-23 22:53:34,709 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) [2023-08-23 22:53:34,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:53:34,710 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:53:34,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-23 22:53:34,710 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-23 22:53:34,710 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:53:34,710 INFO L85 PathProgramCache]: Analyzing trace with hash 867556501, now seen corresponding path program 1 times [2023-08-23 22:53:34,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:53:34,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248227537] [2023-08-23 22:53:34,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:53:34,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:53:34,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:53:34,778 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-23 22:53:34,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:53:34,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248227537] [2023-08-23 22:53:34,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248227537] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:53:34,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:53:34,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-23 22:53:34,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696995995] [2023-08-23 22:53:34,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:53:34,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-23 22:53:34,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:53:34,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-23 22:53:34,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-23 22:53:34,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 91 [2023-08-23 22:53:34,780 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) [2023-08-23 22:53:34,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:53:34,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 91 [2023-08-23 22:53:34,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:53:34,811 INFO L124 PetriNetUnfolderBase]: 25/76 cut-off events. [2023-08-23 22:53:34,811 INFO L125 PetriNetUnfolderBase]: For 58/58 co-relation queries the response was YES. [2023-08-23 22:53:34,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 224 conditions, 76 events. 25/76 cut-off events. For 58/58 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 303 event pairs, 8 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 94. Up to 45 conditions per place. [2023-08-23 22:53:34,811 INFO L140 encePairwiseOnDemand]: 89/91 looper letters, 12 selfloop transitions, 2 changer transitions 0/17 dead transitions. [2023-08-23 22:53:34,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 17 transitions, 102 flow [2023-08-23 22:53:34,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-23 22:53:34,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-23 22:53:34,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 126 transitions. [2023-08-23 22:53:34,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2023-08-23 22:53:34,812 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 126 transitions. [2023-08-23 22:53:34,812 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 126 transitions. [2023-08-23 22:53:34,813 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:53:34,813 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 126 transitions. [2023-08-23 22:53:34,813 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) [2023-08-23 22:53:34,814 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:53:34,814 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:53:34,814 INFO L175 Difference]: Start difference. First operand has 23 places, 16 transitions, 72 flow. Second operand 3 states and 126 transitions. [2023-08-23 22:53:34,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 17 transitions, 102 flow [2023-08-23 22:53:34,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 17 transitions, 100 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-23 22:53:34,815 INFO L231 Difference]: Finished difference. Result has 23 places, 15 transitions, 70 flow [2023-08-23 22:53:34,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, 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} [2023-08-23 22:53:34,815 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 4 predicate places. [2023-08-23 22:53:34,815 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 15 transitions, 70 flow [2023-08-23 22:53:34,815 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) [2023-08-23 22:53:34,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:53:34,816 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-23 22:53:34,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-23 22:53:34,816 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)] === [2023-08-23 22:53:34,816 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:53:34,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1122441926, now seen corresponding path program 1 times [2023-08-23 22:53:34,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:53:34,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931498373] [2023-08-23 22:53:34,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:53:34,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:53:34,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-23 22:53:34,823 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-23 22:53:34,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-23 22:53:34,829 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-23 22:53:34,830 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-23 22:53:34,830 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-23 22:53:34,830 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-08-23 22:53:34,830 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-08-23 22:53:34,830 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-08-23 22:53:34,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-23 22:53:34,830 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-08-23 22:53:34,831 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-23 22:53:34,831 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-23 22:53:34,839 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-23 22:53:34,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 70 places, 64 transitions, 149 flow [2023-08-23 22:53:34,845 INFO L124 PetriNetUnfolderBase]: 4/98 cut-off events. [2023-08-23 22:53:34,845 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-23 22:53:34,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114 conditions, 98 events. 4/98 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 149 event pairs, 0 based on Foata normal form. 0/87 useless extension candidates. Maximal degree in co-relation 78. Up to 8 conditions per place. [2023-08-23 22:53:34,846 INFO L82 GeneralOperation]: Start removeDead. Operand has 70 places, 64 transitions, 149 flow [2023-08-23 22:53:34,846 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 70 places, 64 transitions, 149 flow [2023-08-23 22:53:34,846 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-23 22:53:34,846 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 70 places, 64 transitions, 149 flow [2023-08-23 22:53:34,846 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 70 places, 64 transitions, 149 flow [2023-08-23 22:53:34,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 70 places, 64 transitions, 149 flow [2023-08-23 22:53:34,852 INFO L124 PetriNetUnfolderBase]: 4/98 cut-off events. [2023-08-23 22:53:34,852 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-23 22:53:34,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114 conditions, 98 events. 4/98 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 149 event pairs, 0 based on Foata normal form. 0/87 useless extension candidates. Maximal degree in co-relation 78. Up to 8 conditions per place. [2023-08-23 22:53:34,855 INFO L119 LiptonReduction]: Number of co-enabled transitions 1650 [2023-08-23 22:53:35,689 INFO L134 LiptonReduction]: Checked pairs total: 2465 [2023-08-23 22:53:35,689 INFO L136 LiptonReduction]: Total number of compositions: 47 [2023-08-23 22:53:35,690 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-23 22:53:35,691 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@50c9017a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-23 22:53:35,691 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-23 22:53:35,692 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-23 22:53:35,692 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2023-08-23 22:53:35,692 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-23 22:53:35,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:53:35,692 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-23 22:53:35,692 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-23 22:53:35,693 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:53:35,693 INFO L85 PathProgramCache]: Analyzing trace with hash 387072883, now seen corresponding path program 1 times [2023-08-23 22:53:35,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:53:35,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955068698] [2023-08-23 22:53:35,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:53:35,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:53:35,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:53:35,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:53:35,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:53:35,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955068698] [2023-08-23 22:53:35,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955068698] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:53:35,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:53:35,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-23 22:53:35,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683588524] [2023-08-23 22:53:35,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:53:35,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-23 22:53:35,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:53:35,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-23 22:53:35,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-23 22:53:35,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 111 [2023-08-23 22:53:35,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 18 transitions, 57 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) [2023-08-23 22:53:35,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:53:35,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 111 [2023-08-23 22:53:35,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:53:35,779 INFO L124 PetriNetUnfolderBase]: 370/649 cut-off events. [2023-08-23 22:53:35,779 INFO L125 PetriNetUnfolderBase]: For 169/169 co-relation queries the response was YES. [2023-08-23 22:53:35,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1394 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 3493 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. [2023-08-23 22:53:35,783 INFO L140 encePairwiseOnDemand]: 105/111 looper letters, 20 selfloop transitions, 4 changer transitions 0/27 dead transitions. [2023-08-23 22:53:35,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 27 transitions, 135 flow [2023-08-23 22:53:35,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-23 22:53:35,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-23 22:53:35,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 165 transitions. [2023-08-23 22:53:35,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4954954954954955 [2023-08-23 22:53:35,784 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 165 transitions. [2023-08-23 22:53:35,784 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 165 transitions. [2023-08-23 22:53:35,785 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:53:35,785 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 165 transitions. [2023-08-23 22:53:35,785 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:53:35,786 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:53:35,786 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:53:35,786 INFO L175 Difference]: Start difference. First operand has 25 places, 18 transitions, 57 flow. Second operand 3 states and 165 transitions. [2023-08-23 22:53:35,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 27 transitions, 135 flow [2023-08-23 22:53:35,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 27 transitions, 127 flow, removed 4 selfloop flow, removed 0 redundant places. [2023-08-23 22:53:35,787 INFO L231 Difference]: Finished difference. Result has 28 places, 20 transitions, 79 flow [2023-08-23 22:53:35,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=49, 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=79, PETRI_PLACES=28, PETRI_TRANSITIONS=20} [2023-08-23 22:53:35,787 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 3 predicate places. [2023-08-23 22:53:35,788 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 20 transitions, 79 flow [2023-08-23 22:53:35,788 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) [2023-08-23 22:53:35,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:53:35,788 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:53:35,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-23 22:53:35,788 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-23 22:53:35,788 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:53:35,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1708330831, now seen corresponding path program 1 times [2023-08-23 22:53:35,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:53:35,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553688974] [2023-08-23 22:53:35,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:53:35,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:53:35,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:53:35,802 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-23 22:53:35,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:53:35,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553688974] [2023-08-23 22:53:35,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553688974] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:53:35,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:53:35,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-23 22:53:35,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990298077] [2023-08-23 22:53:35,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:53:35,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-23 22:53:35,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:53:35,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-23 22:53:35,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-23 22:53:35,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 111 [2023-08-23 22:53:35,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 20 transitions, 79 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) [2023-08-23 22:53:35,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:53:35,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 111 [2023-08-23 22:53:35,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:53:35,860 INFO L124 PetriNetUnfolderBase]: 432/765 cut-off events. [2023-08-23 22:53:35,860 INFO L125 PetriNetUnfolderBase]: For 445/445 co-relation queries the response was YES. [2023-08-23 22:53:35,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1996 conditions, 765 events. 432/765 cut-off events. For 445/445 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 4381 event pairs, 182 based on Foata normal form. 0/647 useless extension candidates. Maximal degree in co-relation 950. Up to 429 conditions per place. [2023-08-23 22:53:35,864 INFO L140 encePairwiseOnDemand]: 106/111 looper letters, 22 selfloop transitions, 6 changer transitions 0/31 dead transitions. [2023-08-23 22:53:35,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 31 transitions, 180 flow [2023-08-23 22:53:35,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-23 22:53:35,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-23 22:53:35,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 162 transitions. [2023-08-23 22:53:35,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4864864864864865 [2023-08-23 22:53:35,865 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 162 transitions. [2023-08-23 22:53:35,865 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 162 transitions. [2023-08-23 22:53:35,865 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:53:35,865 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 162 transitions. [2023-08-23 22:53:35,865 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) [2023-08-23 22:53:35,866 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:53:35,866 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:53:35,866 INFO L175 Difference]: Start difference. First operand has 28 places, 20 transitions, 79 flow. Second operand 3 states and 162 transitions. [2023-08-23 22:53:35,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 31 transitions, 180 flow [2023-08-23 22:53:35,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 31 transitions, 166 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-23 22:53:35,868 INFO L231 Difference]: Finished difference. Result has 30 places, 24 transitions, 119 flow [2023-08-23 22:53:35,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=71, 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=119, PETRI_PLACES=30, PETRI_TRANSITIONS=24} [2023-08-23 22:53:35,869 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 5 predicate places. [2023-08-23 22:53:35,869 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 24 transitions, 119 flow [2023-08-23 22:53:35,869 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) [2023-08-23 22:53:35,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:53:35,869 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:53:35,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-23 22:53:35,869 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-23 22:53:35,870 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:53:35,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1419948381, now seen corresponding path program 1 times [2023-08-23 22:53:35,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:53:35,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290360460] [2023-08-23 22:53:35,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:53:35,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:53:35,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:53:35,892 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-23 22:53:35,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:53:35,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290360460] [2023-08-23 22:53:35,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290360460] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:53:35,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:53:35,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-23 22:53:35,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928579386] [2023-08-23 22:53:35,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:53:35,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-23 22:53:35,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:53:35,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-23 22:53:35,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-23 22:53:35,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 111 [2023-08-23 22:53:35,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 119 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) [2023-08-23 22:53:35,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:53:35,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 111 [2023-08-23 22:53:35,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:53:35,948 INFO L124 PetriNetUnfolderBase]: 352/619 cut-off events. [2023-08-23 22:53:35,949 INFO L125 PetriNetUnfolderBase]: For 556/556 co-relation queries the response was YES. [2023-08-23 22:53:35,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1887 conditions, 619 events. 352/619 cut-off events. For 556/556 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 3525 event pairs, 64 based on Foata normal form. 0/557 useless extension candidates. Maximal degree in co-relation 1834. Up to 512 conditions per place. [2023-08-23 22:53:35,952 INFO L140 encePairwiseOnDemand]: 109/111 looper letters, 28 selfloop transitions, 2 changer transitions 0/33 dead transitions. [2023-08-23 22:53:35,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 33 transitions, 225 flow [2023-08-23 22:53:35,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-23 22:53:35,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-23 22:53:35,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 161 transitions. [2023-08-23 22:53:35,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48348348348348347 [2023-08-23 22:53:35,953 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 161 transitions. [2023-08-23 22:53:35,953 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 161 transitions. [2023-08-23 22:53:35,953 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:53:35,953 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 161 transitions. [2023-08-23 22:53:35,953 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) [2023-08-23 22:53:35,954 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:53:35,954 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:53:35,954 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 119 flow. Second operand 3 states and 161 transitions. [2023-08-23 22:53:35,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 33 transitions, 225 flow [2023-08-23 22:53:35,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 33 transitions, 207 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-23 22:53:35,956 INFO L231 Difference]: Finished difference. Result has 29 places, 23 transitions, 107 flow [2023-08-23 22:53:35,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=103, 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=107, PETRI_PLACES=29, PETRI_TRANSITIONS=23} [2023-08-23 22:53:35,957 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 4 predicate places. [2023-08-23 22:53:35,957 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 23 transitions, 107 flow [2023-08-23 22:53:35,957 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) [2023-08-23 22:53:35,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:53:35,957 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:53:35,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-23 22:53:35,957 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-23 22:53:35,957 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:53:35,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1418650112, now seen corresponding path program 1 times [2023-08-23 22:53:35,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:53:35,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660902760] [2023-08-23 22:53:35,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:53:35,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:53:35,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:53:35,978 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-23 22:53:35,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:53:35,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660902760] [2023-08-23 22:53:35,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660902760] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:53:35,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:53:35,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-23 22:53:35,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81235906] [2023-08-23 22:53:35,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:53:35,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-23 22:53:35,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:53:35,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-23 22:53:35,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-23 22:53:35,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 111 [2023-08-23 22:53:35,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 23 transitions, 107 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) [2023-08-23 22:53:35,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:53:35,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 111 [2023-08-23 22:53:35,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:53:36,039 INFO L124 PetriNetUnfolderBase]: 285/518 cut-off events. [2023-08-23 22:53:36,040 INFO L125 PetriNetUnfolderBase]: For 392/392 co-relation queries the response was YES. [2023-08-23 22:53:36,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1527 conditions, 518 events. 285/518 cut-off events. For 392/392 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 2833 event pairs, 51 based on Foata normal form. 0/466 useless extension candidates. Maximal degree in co-relation 778. Up to 412 conditions per place. [2023-08-23 22:53:36,042 INFO L140 encePairwiseOnDemand]: 109/111 looper letters, 25 selfloop transitions, 2 changer transitions 0/30 dead transitions. [2023-08-23 22:53:36,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 30 transitions, 192 flow [2023-08-23 22:53:36,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-23 22:53:36,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-23 22:53:36,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 158 transitions. [2023-08-23 22:53:36,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4744744744744745 [2023-08-23 22:53:36,043 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 158 transitions. [2023-08-23 22:53:36,043 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 158 transitions. [2023-08-23 22:53:36,043 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:53:36,043 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 158 transitions. [2023-08-23 22:53:36,043 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) [2023-08-23 22:53:36,044 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:53:36,044 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:53:36,044 INFO L175 Difference]: Start difference. First operand has 29 places, 23 transitions, 107 flow. Second operand 3 states and 158 transitions. [2023-08-23 22:53:36,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 30 transitions, 192 flow [2023-08-23 22:53:36,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 30 transitions, 189 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-23 22:53:36,045 INFO L231 Difference]: Finished difference. Result has 29 places, 22 transitions, 105 flow [2023-08-23 22:53:36,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=101, 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=105, PETRI_PLACES=29, PETRI_TRANSITIONS=22} [2023-08-23 22:53:36,045 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 4 predicate places. [2023-08-23 22:53:36,045 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 22 transitions, 105 flow [2023-08-23 22:53:36,046 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) [2023-08-23 22:53:36,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:53:36,046 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-23 22:53:36,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-23 22:53:36,046 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-23 22:53:36,046 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:53:36,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1905498328, now seen corresponding path program 1 times [2023-08-23 22:53:36,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:53:36,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140245295] [2023-08-23 22:53:36,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:53:36,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:53:36,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:53:36,061 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-23 22:53:36,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:53:36,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140245295] [2023-08-23 22:53:36,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140245295] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:53:36,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:53:36,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-23 22:53:36,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480938334] [2023-08-23 22:53:36,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:53:36,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-23 22:53:36,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:53:36,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-23 22:53:36,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-23 22:53:36,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 111 [2023-08-23 22:53:36,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 22 transitions, 105 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) [2023-08-23 22:53:36,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:53:36,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 111 [2023-08-23 22:53:36,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:53:36,105 INFO L124 PetriNetUnfolderBase]: 284/582 cut-off events. [2023-08-23 22:53:36,105 INFO L125 PetriNetUnfolderBase]: For 470/470 co-relation queries the response was YES. [2023-08-23 22:53:36,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1687 conditions, 582 events. 284/582 cut-off events. For 470/470 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 3503 event pairs, 140 based on Foata normal form. 0/548 useless extension candidates. Maximal degree in co-relation 904. Up to 341 conditions per place. [2023-08-23 22:53:36,108 INFO L140 encePairwiseOnDemand]: 106/111 looper letters, 20 selfloop transitions, 9 changer transitions 0/32 dead transitions. [2023-08-23 22:53:36,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 32 transitions, 213 flow [2023-08-23 22:53:36,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-23 22:53:36,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-23 22:53:36,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 157 transitions. [2023-08-23 22:53:36,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47147147147147145 [2023-08-23 22:53:36,109 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 157 transitions. [2023-08-23 22:53:36,109 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 157 transitions. [2023-08-23 22:53:36,109 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:53:36,109 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 157 transitions. [2023-08-23 22:53:36,109 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) [2023-08-23 22:53:36,110 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:53:36,110 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:53:36,110 INFO L175 Difference]: Start difference. First operand has 29 places, 22 transitions, 105 flow. Second operand 3 states and 157 transitions. [2023-08-23 22:53:36,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 32 transitions, 213 flow [2023-08-23 22:53:36,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 32 transitions, 209 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-23 22:53:36,111 INFO L231 Difference]: Finished difference. Result has 32 places, 27 transitions, 181 flow [2023-08-23 22:53:36,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=103, 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=181, PETRI_PLACES=32, PETRI_TRANSITIONS=27} [2023-08-23 22:53:36,111 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 7 predicate places. [2023-08-23 22:53:36,111 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 27 transitions, 181 flow [2023-08-23 22:53:36,111 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) [2023-08-23 22:53:36,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:53:36,112 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:53:36,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-23 22:53:36,112 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-23 22:53:36,112 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:53:36,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1059096539, now seen corresponding path program 1 times [2023-08-23 22:53:36,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:53:36,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867385179] [2023-08-23 22:53:36,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:53:36,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:53:36,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:53:36,134 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-23 22:53:36,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:53:36,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867385179] [2023-08-23 22:53:36,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867385179] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:53:36,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:53:36,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-23 22:53:36,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106308721] [2023-08-23 22:53:36,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:53:36,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-23 22:53:36,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:53:36,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-23 22:53:36,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-23 22:53:36,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 111 [2023-08-23 22:53:36,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 27 transitions, 181 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) [2023-08-23 22:53:36,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:53:36,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 111 [2023-08-23 22:53:36,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:53:36,185 INFO L124 PetriNetUnfolderBase]: 237/505 cut-off events. [2023-08-23 22:53:36,185 INFO L125 PetriNetUnfolderBase]: For 763/763 co-relation queries the response was YES. [2023-08-23 22:53:36,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1756 conditions, 505 events. 237/505 cut-off events. For 763/763 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 3005 event pairs, 79 based on Foata normal form. 30/531 useless extension candidates. Maximal degree in co-relation 924. Up to 316 conditions per place. [2023-08-23 22:53:36,188 INFO L140 encePairwiseOnDemand]: 109/111 looper letters, 26 selfloop transitions, 4 changer transitions 0/33 dead transitions. [2023-08-23 22:53:36,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 33 transitions, 273 flow [2023-08-23 22:53:36,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-23 22:53:36,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-23 22:53:36,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 155 transitions. [2023-08-23 22:53:36,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46546546546546547 [2023-08-23 22:53:36,189 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 155 transitions. [2023-08-23 22:53:36,189 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 155 transitions. [2023-08-23 22:53:36,189 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:53:36,189 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 155 transitions. [2023-08-23 22:53:36,189 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) [2023-08-23 22:53:36,190 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:53:36,190 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:53:36,190 INFO L175 Difference]: Start difference. First operand has 32 places, 27 transitions, 181 flow. Second operand 3 states and 155 transitions. [2023-08-23 22:53:36,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 33 transitions, 273 flow [2023-08-23 22:53:36,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 33 transitions, 255 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-23 22:53:36,192 INFO L231 Difference]: Finished difference. Result has 31 places, 26 transitions, 167 flow [2023-08-23 22:53:36,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=159, 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=167, PETRI_PLACES=31, PETRI_TRANSITIONS=26} [2023-08-23 22:53:36,192 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 6 predicate places. [2023-08-23 22:53:36,192 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 26 transitions, 167 flow [2023-08-23 22:53:36,192 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) [2023-08-23 22:53:36,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:53:36,193 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-23 22:53:36,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-23 22:53:36,193 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)] === [2023-08-23 22:53:36,193 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:53:36,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1530336096, now seen corresponding path program 1 times [2023-08-23 22:53:36,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:53:36,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195917098] [2023-08-23 22:53:36,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:53:36,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:53:36,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-23 22:53:36,203 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-23 22:53:36,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-23 22:53:36,213 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-23 22:53:36,213 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-23 22:53:36,213 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-08-23 22:53:36,213 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-08-23 22:53:36,213 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-08-23 22:53:36,214 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-08-23 22:53:36,214 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-08-23 22:53:36,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-23 22:53:36,214 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:53:36,214 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-23 22:53:36,214 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-23 22:53:36,230 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-23 22:53:36,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 84 places, 76 transitions, 184 flow [2023-08-23 22:53:36,240 INFO L124 PetriNetUnfolderBase]: 5/122 cut-off events. [2023-08-23 22:53:36,240 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-08-23 22:53:36,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145 conditions, 122 events. 5/122 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 205 event pairs, 0 based on Foata normal form. 0/108 useless extension candidates. Maximal degree in co-relation 106. Up to 10 conditions per place. [2023-08-23 22:53:36,241 INFO L82 GeneralOperation]: Start removeDead. Operand has 84 places, 76 transitions, 184 flow [2023-08-23 22:53:36,241 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 84 places, 76 transitions, 184 flow [2023-08-23 22:53:36,241 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-23 22:53:36,241 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 84 places, 76 transitions, 184 flow [2023-08-23 22:53:36,241 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 84 places, 76 transitions, 184 flow [2023-08-23 22:53:36,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 84 places, 76 transitions, 184 flow [2023-08-23 22:53:36,248 INFO L124 PetriNetUnfolderBase]: 5/122 cut-off events. [2023-08-23 22:53:36,248 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-08-23 22:53:36,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145 conditions, 122 events. 5/122 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 205 event pairs, 0 based on Foata normal form. 0/108 useless extension candidates. Maximal degree in co-relation 106. Up to 10 conditions per place. [2023-08-23 22:53:36,250 INFO L119 LiptonReduction]: Number of co-enabled transitions 2728 [2023-08-23 22:53:37,134 INFO L134 LiptonReduction]: Checked pairs total: 3813 [2023-08-23 22:53:37,135 INFO L136 LiptonReduction]: Total number of compositions: 55 [2023-08-23 22:53:37,136 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-23 22:53:37,136 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@50c9017a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-23 22:53:37,136 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-23 22:53:37,137 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-23 22:53:37,137 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2023-08-23 22:53:37,137 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-23 22:53:37,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:53:37,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-23 22:53:37,137 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-23 22:53:37,137 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:53:37,138 INFO L85 PathProgramCache]: Analyzing trace with hash 522516946, now seen corresponding path program 1 times [2023-08-23 22:53:37,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:53:37,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850191916] [2023-08-23 22:53:37,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:53:37,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:53:37,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:53:37,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:53:37,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:53:37,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850191916] [2023-08-23 22:53:37,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850191916] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:53:37,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:53:37,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-23 22:53:37,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394721669] [2023-08-23 22:53:37,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:53:37,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-23 22:53:37,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:53:37,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-23 22:53:37,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-23 22:53:37,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 131 [2023-08-23 22:53:37,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 22 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) [2023-08-23 22:53:37,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:53:37,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 131 [2023-08-23 22:53:37,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:53:37,340 INFO L124 PetriNetUnfolderBase]: 2300/3511 cut-off events. [2023-08-23 22:53:37,340 INFO L125 PetriNetUnfolderBase]: For 1374/1374 co-relation queries the response was YES. [2023-08-23 22:53:37,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7619 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 20881 event pairs, 1224 based on Foata normal form. 0/2580 useless extension candidates. Maximal degree in co-relation 1418. Up to 2129 conditions per place. [2023-08-23 22:53:37,354 INFO L140 encePairwiseOnDemand]: 124/131 looper letters, 27 selfloop transitions, 5 changer transitions 0/35 dead transitions. [2023-08-23 22:53:37,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 35 transitions, 187 flow [2023-08-23 22:53:37,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-23 22:53:37,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-23 22:53:37,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 197 transitions. [2023-08-23 22:53:37,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5012722646310432 [2023-08-23 22:53:37,355 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 197 transitions. [2023-08-23 22:53:37,355 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 197 transitions. [2023-08-23 22:53:37,356 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:53:37,356 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 197 transitions. [2023-08-23 22:53:37,356 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:53:37,357 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:53:37,357 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:53:37,357 INFO L175 Difference]: Start difference. First operand has 31 places, 22 transitions, 76 flow. Second operand 3 states and 197 transitions. [2023-08-23 22:53:37,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 35 transitions, 187 flow [2023-08-23 22:53:37,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 35 transitions, 169 flow, removed 9 selfloop flow, removed 0 redundant places. [2023-08-23 22:53:37,358 INFO L231 Difference]: Finished difference. Result has 34 places, 25 transitions, 100 flow [2023-08-23 22:53:37,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=62, 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=100, PETRI_PLACES=34, PETRI_TRANSITIONS=25} [2023-08-23 22:53:37,359 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 3 predicate places. [2023-08-23 22:53:37,359 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 25 transitions, 100 flow [2023-08-23 22:53:37,359 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) [2023-08-23 22:53:37,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:53:37,359 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:53:37,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-23 22:53:37,359 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-23 22:53:37,359 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:53:37,359 INFO L85 PathProgramCache]: Analyzing trace with hash -61129782, now seen corresponding path program 1 times [2023-08-23 22:53:37,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:53:37,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378085168] [2023-08-23 22:53:37,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:53:37,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:53:37,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:53:37,371 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-23 22:53:37,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:53:37,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378085168] [2023-08-23 22:53:37,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378085168] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:53:37,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:53:37,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-23 22:53:37,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154997735] [2023-08-23 22:53:37,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:53:37,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-23 22:53:37,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:53:37,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-23 22:53:37,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-23 22:53:37,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 131 [2023-08-23 22:53:37,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 25 transitions, 100 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) [2023-08-23 22:53:37,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:53:37,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 131 [2023-08-23 22:53:37,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:53:37,641 INFO L124 PetriNetUnfolderBase]: 3060/4717 cut-off events. [2023-08-23 22:53:37,641 INFO L125 PetriNetUnfolderBase]: For 2755/2755 co-relation queries the response was YES. [2023-08-23 22:53:37,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12124 conditions, 4717 events. 3060/4717 cut-off events. For 2755/2755 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 30285 event pairs, 1352 based on Foata normal form. 0/3849 useless extension candidates. Maximal degree in co-relation 5760. Up to 2885 conditions per place. [2023-08-23 22:53:37,667 INFO L140 encePairwiseOnDemand]: 125/131 looper letters, 30 selfloop transitions, 8 changer transitions 0/41 dead transitions. [2023-08-23 22:53:37,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 41 transitions, 242 flow [2023-08-23 22:53:37,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-23 22:53:37,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-23 22:53:37,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 194 transitions. [2023-08-23 22:53:37,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49363867684478374 [2023-08-23 22:53:37,668 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 194 transitions. [2023-08-23 22:53:37,668 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 194 transitions. [2023-08-23 22:53:37,668 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:53:37,669 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 194 transitions. [2023-08-23 22:53:37,669 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) [2023-08-23 22:53:37,670 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:53:37,670 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:53:37,671 INFO L175 Difference]: Start difference. First operand has 34 places, 25 transitions, 100 flow. Second operand 3 states and 194 transitions. [2023-08-23 22:53:37,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 41 transitions, 242 flow [2023-08-23 22:53:37,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 41 transitions, 224 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-23 22:53:37,679 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 158 flow [2023-08-23 22:53:37,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=90, 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=158, PETRI_PLACES=36, PETRI_TRANSITIONS=31} [2023-08-23 22:53:37,680 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 5 predicate places. [2023-08-23 22:53:37,680 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 158 flow [2023-08-23 22:53:37,680 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) [2023-08-23 22:53:37,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:53:37,680 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:53:37,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-23 22:53:37,680 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-23 22:53:37,680 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:53:37,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1893461327, now seen corresponding path program 1 times [2023-08-23 22:53:37,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:53:37,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052006246] [2023-08-23 22:53:37,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:53:37,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:53:37,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:53:37,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-23 22:53:37,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:53:37,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052006246] [2023-08-23 22:53:37,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052006246] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:53:37,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:53:37,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-23 22:53:37,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026457356] [2023-08-23 22:53:37,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:53:37,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-23 22:53:37,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:53:37,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-23 22:53:37,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-23 22:53:37,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 131 [2023-08-23 22:53:37,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 31 transitions, 158 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) [2023-08-23 22:53:37,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:53:37,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 131 [2023-08-23 22:53:37,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:53:37,921 INFO L124 PetriNetUnfolderBase]: 2474/3707 cut-off events. [2023-08-23 22:53:37,921 INFO L125 PetriNetUnfolderBase]: For 3413/3413 co-relation queries the response was YES. [2023-08-23 22:53:37,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11159 conditions, 3707 events. 2474/3707 cut-off events. For 3413/3413 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 22880 event pairs, 472 based on Foata normal form. 0/3135 useless extension candidates. Maximal degree in co-relation 11105. Up to 3026 conditions per place. [2023-08-23 22:53:37,939 INFO L140 encePairwiseOnDemand]: 129/131 looper letters, 41 selfloop transitions, 2 changer transitions 0/46 dead transitions. [2023-08-23 22:53:37,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 46 transitions, 321 flow [2023-08-23 22:53:37,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-23 22:53:37,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-23 22:53:37,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 193 transitions. [2023-08-23 22:53:37,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4910941475826972 [2023-08-23 22:53:37,940 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 193 transitions. [2023-08-23 22:53:37,940 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 193 transitions. [2023-08-23 22:53:37,940 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:53:37,940 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 193 transitions. [2023-08-23 22:53:37,940 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) [2023-08-23 22:53:37,941 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:53:37,941 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:53:37,941 INFO L175 Difference]: Start difference. First operand has 36 places, 31 transitions, 158 flow. Second operand 3 states and 193 transitions. [2023-08-23 22:53:37,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 46 transitions, 321 flow [2023-08-23 22:53:37,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 46 transitions, 297 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-23 22:53:37,947 INFO L231 Difference]: Finished difference. Result has 35 places, 30 transitions, 142 flow [2023-08-23 22:53:37,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=138, 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=142, PETRI_PLACES=35, PETRI_TRANSITIONS=30} [2023-08-23 22:53:37,948 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 4 predicate places. [2023-08-23 22:53:37,948 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 30 transitions, 142 flow [2023-08-23 22:53:37,948 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) [2023-08-23 22:53:37,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:53:37,948 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:53:37,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-23 22:53:37,948 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-23 22:53:37,948 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:53:37,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1895020926, now seen corresponding path program 1 times [2023-08-23 22:53:37,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:53:37,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045679882] [2023-08-23 22:53:37,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:53:37,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:53:37,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:53:37,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-23 22:53:37,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:53:37,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045679882] [2023-08-23 22:53:37,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045679882] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:53:37,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:53:37,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-23 22:53:37,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447079363] [2023-08-23 22:53:37,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:53:37,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-23 22:53:37,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:53:37,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-23 22:53:37,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-23 22:53:37,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 131 [2023-08-23 22:53:37,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 30 transitions, 142 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) [2023-08-23 22:53:37,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:53:37,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 131 [2023-08-23 22:53:37,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:53:38,145 INFO L124 PetriNetUnfolderBase]: 1993/3029 cut-off events. [2023-08-23 22:53:38,145 INFO L125 PetriNetUnfolderBase]: For 2304/2304 co-relation queries the response was YES. [2023-08-23 22:53:38,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8826 conditions, 3029 events. 1993/3029 cut-off events. For 2304/2304 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 18194 event pairs, 335 based on Foata normal form. 0/2587 useless extension candidates. Maximal degree in co-relation 4399. Up to 2450 conditions per place. [2023-08-23 22:53:38,156 INFO L140 encePairwiseOnDemand]: 129/131 looper letters, 38 selfloop transitions, 2 changer transitions 0/43 dead transitions. [2023-08-23 22:53:38,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 43 transitions, 282 flow [2023-08-23 22:53:38,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-23 22:53:38,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-23 22:53:38,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 190 transitions. [2023-08-23 22:53:38,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48346055979643765 [2023-08-23 22:53:38,157 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 190 transitions. [2023-08-23 22:53:38,157 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 190 transitions. [2023-08-23 22:53:38,158 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:53:38,158 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 190 transitions. [2023-08-23 22:53:38,158 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) [2023-08-23 22:53:38,159 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:53:38,159 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:53:38,159 INFO L175 Difference]: Start difference. First operand has 35 places, 30 transitions, 142 flow. Second operand 3 states and 190 transitions. [2023-08-23 22:53:38,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 43 transitions, 282 flow [2023-08-23 22:53:38,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 43 transitions, 279 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-23 22:53:38,160 INFO L231 Difference]: Finished difference. Result has 35 places, 29 transitions, 140 flow [2023-08-23 22:53:38,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=136, 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=140, PETRI_PLACES=35, PETRI_TRANSITIONS=29} [2023-08-23 22:53:38,160 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 4 predicate places. [2023-08-23 22:53:38,160 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 29 transitions, 140 flow [2023-08-23 22:53:38,160 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) [2023-08-23 22:53:38,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:53:38,161 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-23 22:53:38,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-23 22:53:38,161 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-23 22:53:38,161 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:53:38,161 INFO L85 PathProgramCache]: Analyzing trace with hash -189575826, now seen corresponding path program 1 times [2023-08-23 22:53:38,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:53:38,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013114084] [2023-08-23 22:53:38,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:53:38,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:53:38,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:53:38,175 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-23 22:53:38,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:53:38,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013114084] [2023-08-23 22:53:38,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013114084] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:53:38,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:53:38,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-23 22:53:38,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194891332] [2023-08-23 22:53:38,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:53:38,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-23 22:53:38,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:53:38,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-23 22:53:38,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-23 22:53:38,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 131 [2023-08-23 22:53:38,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 29 transitions, 140 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) [2023-08-23 22:53:38,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:53:38,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 131 [2023-08-23 22:53:38,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:53:38,366 INFO L124 PetriNetUnfolderBase]: 2430/3913 cut-off events. [2023-08-23 22:53:38,366 INFO L125 PetriNetUnfolderBase]: For 3547/3547 co-relation queries the response was YES. [2023-08-23 22:53:38,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11283 conditions, 3913 events. 2430/3913 cut-off events. For 3547/3547 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 26090 event pairs, 988 based on Foata normal form. 0/3420 useless extension candidates. Maximal degree in co-relation 6586. Up to 2459 conditions per place. [2023-08-23 22:53:38,383 INFO L140 encePairwiseOnDemand]: 125/131 looper letters, 30 selfloop transitions, 13 changer transitions 0/46 dead transitions. [2023-08-23 22:53:38,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 46 transitions, 311 flow [2023-08-23 22:53:38,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-23 22:53:38,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-23 22:53:38,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 189 transitions. [2023-08-23 22:53:38,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48091603053435117 [2023-08-23 22:53:38,384 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 189 transitions. [2023-08-23 22:53:38,384 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 189 transitions. [2023-08-23 22:53:38,384 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:53:38,384 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 189 transitions. [2023-08-23 22:53:38,385 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) [2023-08-23 22:53:38,385 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:53:38,385 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:53:38,385 INFO L175 Difference]: Start difference. First operand has 35 places, 29 transitions, 140 flow. Second operand 3 states and 189 transitions. [2023-08-23 22:53:38,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 46 transitions, 311 flow [2023-08-23 22:53:38,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 46 transitions, 307 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-23 22:53:38,387 INFO L231 Difference]: Finished difference. Result has 38 places, 38 transitions, 264 flow [2023-08-23 22:53:38,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=138, 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=264, PETRI_PLACES=38, PETRI_TRANSITIONS=38} [2023-08-23 22:53:38,388 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 7 predicate places. [2023-08-23 22:53:38,388 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 38 transitions, 264 flow [2023-08-23 22:53:38,388 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) [2023-08-23 22:53:38,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:53:38,388 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:53:38,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-23 22:53:38,388 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-23 22:53:38,388 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:53:38,389 INFO L85 PathProgramCache]: Analyzing trace with hash -1581880004, now seen corresponding path program 1 times [2023-08-23 22:53:38,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:53:38,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619085385] [2023-08-23 22:53:38,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:53:38,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:53:38,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:53:38,410 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-23 22:53:38,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:53:38,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619085385] [2023-08-23 22:53:38,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619085385] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:53:38,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:53:38,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-23 22:53:38,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750710537] [2023-08-23 22:53:38,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:53:38,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-23 22:53:38,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:53:38,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-23 22:53:38,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-23 22:53:38,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 131 [2023-08-23 22:53:38,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 38 transitions, 264 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) [2023-08-23 22:53:38,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:53:38,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 131 [2023-08-23 22:53:38,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:53:38,591 INFO L124 PetriNetUnfolderBase]: 1955/3099 cut-off events. [2023-08-23 22:53:38,591 INFO L125 PetriNetUnfolderBase]: For 5131/5131 co-relation queries the response was YES. [2023-08-23 22:53:38,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11103 conditions, 3099 events. 1955/3099 cut-off events. For 5131/5131 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 19739 event pairs, 409 based on Foata normal form. 204/3066 useless extension candidates. Maximal degree in co-relation 6139. Up to 2442 conditions per place. [2023-08-23 22:53:38,604 INFO L140 encePairwiseOnDemand]: 129/131 looper letters, 45 selfloop transitions, 4 changer transitions 0/52 dead transitions. [2023-08-23 22:53:38,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 52 transitions, 447 flow [2023-08-23 22:53:38,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-23 22:53:38,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-23 22:53:38,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 187 transitions. [2023-08-23 22:53:38,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4758269720101781 [2023-08-23 22:53:38,605 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 187 transitions. [2023-08-23 22:53:38,605 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 187 transitions. [2023-08-23 22:53:38,605 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:53:38,606 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 187 transitions. [2023-08-23 22:53:38,606 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) [2023-08-23 22:53:38,606 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:53:38,607 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:53:38,607 INFO L175 Difference]: Start difference. First operand has 38 places, 38 transitions, 264 flow. Second operand 3 states and 187 transitions. [2023-08-23 22:53:38,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 52 transitions, 447 flow [2023-08-23 22:53:38,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 52 transitions, 421 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-23 22:53:38,611 INFO L231 Difference]: Finished difference. Result has 37 places, 37 transitions, 242 flow [2023-08-23 22:53:38,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=234, 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=242, PETRI_PLACES=37, PETRI_TRANSITIONS=37} [2023-08-23 22:53:38,611 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 6 predicate places. [2023-08-23 22:53:38,611 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 37 transitions, 242 flow [2023-08-23 22:53:38,612 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) [2023-08-23 22:53:38,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:53:38,612 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:53:38,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-23 22:53:38,612 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-23 22:53:38,612 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:53:38,612 INFO L85 PathProgramCache]: Analyzing trace with hash -248126422, now seen corresponding path program 1 times [2023-08-23 22:53:38,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:53:38,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137664395] [2023-08-23 22:53:38,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:53:38,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:53:38,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:53:38,626 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-23 22:53:38,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:53:38,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137664395] [2023-08-23 22:53:38,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137664395] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:53:38,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:53:38,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-23 22:53:38,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834096742] [2023-08-23 22:53:38,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:53:38,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-23 22:53:38,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:53:38,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-23 22:53:38,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-23 22:53:38,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 131 [2023-08-23 22:53:38,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 37 transitions, 242 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) [2023-08-23 22:53:38,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:53:38,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 131 [2023-08-23 22:53:38,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:53:38,825 INFO L124 PetriNetUnfolderBase]: 2132/3676 cut-off events. [2023-08-23 22:53:38,825 INFO L125 PetriNetUnfolderBase]: For 5429/5429 co-relation queries the response was YES. [2023-08-23 22:53:38,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12139 conditions, 3676 events. 2132/3676 cut-off events. For 5429/5429 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 25943 event pairs, 890 based on Foata normal form. 0/3493 useless extension candidates. Maximal degree in co-relation 6087. Up to 2397 conditions per place. [2023-08-23 22:53:38,842 INFO L140 encePairwiseOnDemand]: 125/131 looper letters, 33 selfloop transitions, 21 changer transitions 0/57 dead transitions. [2023-08-23 22:53:38,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 57 transitions, 490 flow [2023-08-23 22:53:38,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-23 22:53:38,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-23 22:53:38,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 186 transitions. [2023-08-23 22:53:38,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4732824427480916 [2023-08-23 22:53:38,843 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 186 transitions. [2023-08-23 22:53:38,843 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 186 transitions. [2023-08-23 22:53:38,843 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:53:38,843 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 186 transitions. [2023-08-23 22:53:38,844 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) [2023-08-23 22:53:38,844 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:53:38,845 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:53:38,845 INFO L175 Difference]: Start difference. First operand has 37 places, 37 transitions, 242 flow. Second operand 3 states and 186 transitions. [2023-08-23 22:53:38,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 57 transitions, 490 flow [2023-08-23 22:53:38,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 57 transitions, 482 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-23 22:53:38,847 INFO L231 Difference]: Finished difference. Result has 40 places, 50 transitions, 460 flow [2023-08-23 22:53:38,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=238, 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=460, PETRI_PLACES=40, PETRI_TRANSITIONS=50} [2023-08-23 22:53:38,847 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 9 predicate places. [2023-08-23 22:53:38,847 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 50 transitions, 460 flow [2023-08-23 22:53:38,848 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) [2023-08-23 22:53:38,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:53:38,848 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:53:38,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-23 22:53:38,848 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-23 22:53:38,848 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:53:38,848 INFO L85 PathProgramCache]: Analyzing trace with hash 898018579, now seen corresponding path program 1 times [2023-08-23 22:53:38,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:53:38,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222641073] [2023-08-23 22:53:38,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:53:38,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:53:38,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:53:38,883 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-23 22:53:38,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:53:38,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222641073] [2023-08-23 22:53:38,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222641073] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:53:38,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:53:38,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-23 22:53:38,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499945588] [2023-08-23 22:53:38,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:53:38,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-23 22:53:38,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:53:38,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-23 22:53:38,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-23 22:53:38,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 131 [2023-08-23 22:53:38,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 50 transitions, 460 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) [2023-08-23 22:53:38,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:53:38,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 131 [2023-08-23 22:53:38,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:53:39,086 INFO L124 PetriNetUnfolderBase]: 1771/3145 cut-off events. [2023-08-23 22:53:39,086 INFO L125 PetriNetUnfolderBase]: For 7685/7685 co-relation queries the response was YES. [2023-08-23 22:53:39,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12210 conditions, 3145 events. 1771/3145 cut-off events. For 7685/7685 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 22274 event pairs, 569 based on Foata normal form. 170/3302 useless extension candidates. Maximal degree in co-relation 6082. Up to 1944 conditions per place. [2023-08-23 22:53:39,101 INFO L140 encePairwiseOnDemand]: 129/131 looper letters, 54 selfloop transitions, 8 changer transitions 0/65 dead transitions. [2023-08-23 22:53:39,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 65 transitions, 705 flow [2023-08-23 22:53:39,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-23 22:53:39,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-23 22:53:39,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 184 transitions. [2023-08-23 22:53:39,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4681933842239186 [2023-08-23 22:53:39,102 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 184 transitions. [2023-08-23 22:53:39,102 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 184 transitions. [2023-08-23 22:53:39,102 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:53:39,102 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 184 transitions. [2023-08-23 22:53:39,103 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) [2023-08-23 22:53:39,103 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:53:39,104 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:53:39,104 INFO L175 Difference]: Start difference. First operand has 40 places, 50 transitions, 460 flow. Second operand 3 states and 184 transitions. [2023-08-23 22:53:39,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 65 transitions, 705 flow [2023-08-23 22:53:39,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 65 transitions, 663 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-23 22:53:39,110 INFO L231 Difference]: Finished difference. Result has 39 places, 49 transitions, 430 flow [2023-08-23 22:53:39,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=414, 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=430, PETRI_PLACES=39, PETRI_TRANSITIONS=49} [2023-08-23 22:53:39,110 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 8 predicate places. [2023-08-23 22:53:39,110 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 49 transitions, 430 flow [2023-08-23 22:53:39,110 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) [2023-08-23 22:53:39,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:53:39,110 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-23 22:53:39,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-23 22:53:39,110 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)] === [2023-08-23 22:53:39,111 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:53:39,111 INFO L85 PathProgramCache]: Analyzing trace with hash 2065653506, now seen corresponding path program 1 times [2023-08-23 22:53:39,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:53:39,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602988063] [2023-08-23 22:53:39,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:53:39,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:53:39,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-23 22:53:39,117 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-23 22:53:39,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-23 22:53:39,123 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-23 22:53:39,123 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-23 22:53:39,123 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-08-23 22:53:39,123 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-08-23 22:53:39,123 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-08-23 22:53:39,123 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-08-23 22:53:39,123 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-08-23 22:53:39,123 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-08-23 22:53:39,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-23 22:53:39,123 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:53:39,124 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-23 22:53:39,124 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-23 22:53:39,135 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-23 22:53:39,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 98 places, 88 transitions, 221 flow [2023-08-23 22:53:39,143 INFO L124 PetriNetUnfolderBase]: 6/146 cut-off events. [2023-08-23 22:53:39,143 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-08-23 22:53:39,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177 conditions, 146 events. 6/146 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 260 event pairs, 0 based on Foata normal form. 0/129 useless extension candidates. Maximal degree in co-relation 135. Up to 12 conditions per place. [2023-08-23 22:53:39,143 INFO L82 GeneralOperation]: Start removeDead. Operand has 98 places, 88 transitions, 221 flow [2023-08-23 22:53:39,144 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 98 places, 88 transitions, 221 flow [2023-08-23 22:53:39,144 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-23 22:53:39,144 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 98 places, 88 transitions, 221 flow [2023-08-23 22:53:39,144 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 98 places, 88 transitions, 221 flow [2023-08-23 22:53:39,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 98 places, 88 transitions, 221 flow [2023-08-23 22:53:39,150 INFO L124 PetriNetUnfolderBase]: 6/146 cut-off events. [2023-08-23 22:53:39,151 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-08-23 22:53:39,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177 conditions, 146 events. 6/146 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 260 event pairs, 0 based on Foata normal form. 0/129 useless extension candidates. Maximal degree in co-relation 135. Up to 12 conditions per place. [2023-08-23 22:53:39,153 INFO L119 LiptonReduction]: Number of co-enabled transitions 4070 [2023-08-23 22:53:40,195 INFO L134 LiptonReduction]: Checked pairs total: 5927 [2023-08-23 22:53:40,196 INFO L136 LiptonReduction]: Total number of compositions: 63 [2023-08-23 22:53:40,197 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-23 22:53:40,197 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@50c9017a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-23 22:53:40,197 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-23 22:53:40,198 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-23 22:53:40,198 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2023-08-23 22:53:40,198 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-23 22:53:40,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:53:40,198 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-23 22:53:40,199 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-08-23 22:53:40,199 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:53:40,199 INFO L85 PathProgramCache]: Analyzing trace with hash 678000492, now seen corresponding path program 1 times [2023-08-23 22:53:40,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:53:40,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325817657] [2023-08-23 22:53:40,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:53:40,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:53:40,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:53:40,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:53:40,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:53:40,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325817657] [2023-08-23 22:53:40,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325817657] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:53:40,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:53:40,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-23 22:53:40,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479825355] [2023-08-23 22:53:40,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:53:40,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-23 22:53:40,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:53:40,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-23 22:53:40,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-23 22:53:40,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-08-23 22:53:40,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 26 transitions, 97 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) [2023-08-23 22:53:40,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:53:40,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-08-23 22:53:40,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:53:41,030 INFO L124 PetriNetUnfolderBase]: 12384/17359 cut-off events. [2023-08-23 22:53:41,030 INFO L125 PetriNetUnfolderBase]: For 8948/8948 co-relation queries the response was YES. [2023-08-23 22:53:41,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37925 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 107421 event pairs, 6940 based on Foata normal form. 0/12846 useless extension candidates. Maximal degree in co-relation 7783. Up to 11057 conditions per place. [2023-08-23 22:53:41,100 INFO L140 encePairwiseOnDemand]: 143/151 looper letters, 34 selfloop transitions, 6 changer transitions 0/43 dead transitions. [2023-08-23 22:53:41,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 43 transitions, 243 flow [2023-08-23 22:53:41,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-23 22:53:41,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-23 22:53:41,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 229 transitions. [2023-08-23 22:53:41,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5055187637969095 [2023-08-23 22:53:41,101 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 229 transitions. [2023-08-23 22:53:41,101 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 229 transitions. [2023-08-23 22:53:41,101 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:53:41,101 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 229 transitions. [2023-08-23 22:53:41,102 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 76.33333333333333) internal successors, (229), 3 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:53:41,102 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:53:41,103 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:53:41,103 INFO L175 Difference]: Start difference. First operand has 37 places, 26 transitions, 97 flow. Second operand 3 states and 229 transitions. [2023-08-23 22:53:41,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 43 transitions, 243 flow [2023-08-23 22:53:41,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 43 transitions, 211 flow, removed 16 selfloop flow, removed 0 redundant places. [2023-08-23 22:53:41,109 INFO L231 Difference]: Finished difference. Result has 40 places, 30 transitions, 121 flow [2023-08-23 22:53:41,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=75, 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=121, PETRI_PLACES=40, PETRI_TRANSITIONS=30} [2023-08-23 22:53:41,110 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 3 predicate places. [2023-08-23 22:53:41,110 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 30 transitions, 121 flow [2023-08-23 22:53:41,113 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) [2023-08-23 22:53:41,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:53:41,113 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:53:41,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-08-23 22:53:41,113 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-08-23 22:53:41,113 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:53:41,114 INFO L85 PathProgramCache]: Analyzing trace with hash -2026213594, now seen corresponding path program 1 times [2023-08-23 22:53:41,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:53:41,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421213820] [2023-08-23 22:53:41,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:53:41,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:53:41,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:53:41,128 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-23 22:53:41,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:53:41,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421213820] [2023-08-23 22:53:41,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421213820] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:53:41,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:53:41,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-23 22:53:41,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886065759] [2023-08-23 22:53:41,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:53:41,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-23 22:53:41,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:53:41,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-23 22:53:41,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-23 22:53:41,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-08-23 22:53:41,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 30 transitions, 121 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) [2023-08-23 22:53:41,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:53:41,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-08-23 22:53:41,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:53:42,371 INFO L124 PetriNetUnfolderBase]: 17214/24347 cut-off events. [2023-08-23 22:53:42,371 INFO L125 PetriNetUnfolderBase]: For 13763/13763 co-relation queries the response was YES. [2023-08-23 22:53:42,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62070 conditions, 24347 events. 17214/24347 cut-off events. For 13763/13763 co-relation queries the response was YES. Maximal size of possible extension queue 1703. Compared 161749 event pairs, 8064 based on Foata normal form. 0/19341 useless extension candidates. Maximal degree in co-relation 29432. Up to 15695 conditions per place. [2023-08-23 22:53:42,565 INFO L140 encePairwiseOnDemand]: 144/151 looper letters, 38 selfloop transitions, 10 changer transitions 0/51 dead transitions. [2023-08-23 22:53:42,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 51 transitions, 304 flow [2023-08-23 22:53:42,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-23 22:53:42,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-23 22:53:42,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 226 transitions. [2023-08-23 22:53:42,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4988962472406181 [2023-08-23 22:53:42,567 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 226 transitions. [2023-08-23 22:53:42,567 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 226 transitions. [2023-08-23 22:53:42,567 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:53:42,567 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 226 transitions. [2023-08-23 22:53:42,567 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) [2023-08-23 22:53:42,568 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:53:42,568 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:53:42,568 INFO L175 Difference]: Start difference. First operand has 40 places, 30 transitions, 121 flow. Second operand 3 states and 226 transitions. [2023-08-23 22:53:42,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 51 transitions, 304 flow [2023-08-23 22:53:42,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 51 transitions, 282 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-23 22:53:42,639 INFO L231 Difference]: Finished difference. Result has 42 places, 38 transitions, 197 flow [2023-08-23 22:53:42,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=109, 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=197, PETRI_PLACES=42, PETRI_TRANSITIONS=38} [2023-08-23 22:53:42,639 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 5 predicate places. [2023-08-23 22:53:42,639 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 38 transitions, 197 flow [2023-08-23 22:53:42,639 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) [2023-08-23 22:53:42,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:53:42,639 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:53:42,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-08-23 22:53:42,640 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-08-23 22:53:42,640 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:53:42,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1613796839, now seen corresponding path program 1 times [2023-08-23 22:53:42,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:53:42,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044936386] [2023-08-23 22:53:42,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:53:42,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:53:42,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:53:42,661 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-23 22:53:42,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:53:42,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044936386] [2023-08-23 22:53:42,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044936386] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:53:42,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:53:42,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-23 22:53:42,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546131550] [2023-08-23 22:53:42,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:53:42,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-23 22:53:42,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:53:42,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-23 22:53:42,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-23 22:53:42,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-08-23 22:53:42,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 38 transitions, 197 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) [2023-08-23 22:53:42,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:53:42,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-08-23 22:53:42,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:53:43,517 INFO L124 PetriNetUnfolderBase]: 13946/19127 cut-off events. [2023-08-23 22:53:43,517 INFO L125 PetriNetUnfolderBase]: For 17220/17220 co-relation queries the response was YES. [2023-08-23 22:53:43,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56975 conditions, 19127 events. 13946/19127 cut-off events. For 17220/17220 co-relation queries the response was YES. Maximal size of possible extension queue 1381. Compared 121192 event pairs, 2700 based on Foata normal form. 0/15793 useless extension candidates. Maximal degree in co-relation 56920. Up to 15496 conditions per place. [2023-08-23 22:53:43,623 INFO L140 encePairwiseOnDemand]: 149/151 looper letters, 53 selfloop transitions, 2 changer transitions 0/58 dead transitions. [2023-08-23 22:53:43,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 58 transitions, 409 flow [2023-08-23 22:53:43,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-23 22:53:43,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-23 22:53:43,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 225 transitions. [2023-08-23 22:53:43,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4966887417218543 [2023-08-23 22:53:43,624 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 225 transitions. [2023-08-23 22:53:43,624 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 225 transitions. [2023-08-23 22:53:43,625 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:53:43,625 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 225 transitions. [2023-08-23 22:53:43,625 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) [2023-08-23 22:53:43,626 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:53:43,627 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:53:43,627 INFO L175 Difference]: Start difference. First operand has 42 places, 38 transitions, 197 flow. Second operand 3 states and 225 transitions. [2023-08-23 22:53:43,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 58 transitions, 409 flow [2023-08-23 22:53:43,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 58 transitions, 379 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-23 22:53:43,833 INFO L231 Difference]: Finished difference. Result has 41 places, 37 transitions, 177 flow [2023-08-23 22:53:43,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=173, 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=177, PETRI_PLACES=41, PETRI_TRANSITIONS=37} [2023-08-23 22:53:43,834 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 4 predicate places. [2023-08-23 22:53:43,834 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 177 flow [2023-08-23 22:53:43,834 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) [2023-08-23 22:53:43,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:53:43,834 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:53:43,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-08-23 22:53:43,834 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-08-23 22:53:43,834 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:53:43,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1611892188, now seen corresponding path program 1 times [2023-08-23 22:53:43,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:53:43,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258136544] [2023-08-23 22:53:43,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:53:43,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:53:43,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:53:43,856 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-23 22:53:43,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:53:43,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258136544] [2023-08-23 22:53:43,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258136544] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:53:43,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:53:43,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-23 22:53:43,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547313053] [2023-08-23 22:53:43,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:53:43,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-23 22:53:43,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:53:43,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-23 22:53:43,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-23 22:53:43,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-08-23 22:53:43,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 177 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) [2023-08-23 22:53:43,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:53:43,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-08-23 22:53:43,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:53:44,742 INFO L124 PetriNetUnfolderBase]: 11269/15577 cut-off events. [2023-08-23 22:53:44,743 INFO L125 PetriNetUnfolderBase]: For 11490/11490 co-relation queries the response was YES. [2023-08-23 22:53:44,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44879 conditions, 15577 events. 11269/15577 cut-off events. For 11490/11490 co-relation queries the response was YES. Maximal size of possible extension queue 1135. Compared 96113 event pairs, 1895 based on Foata normal form. 0/12813 useless extension candidates. Maximal degree in co-relation 23207. Up to 12576 conditions per place. [2023-08-23 22:53:44,807 INFO L140 encePairwiseOnDemand]: 149/151 looper letters, 50 selfloop transitions, 2 changer transitions 0/55 dead transitions. [2023-08-23 22:53:44,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 55 transitions, 364 flow [2023-08-23 22:53:44,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-23 22:53:44,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-23 22:53:44,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 222 transitions. [2023-08-23 22:53:44,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4900662251655629 [2023-08-23 22:53:44,808 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 222 transitions. [2023-08-23 22:53:44,808 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 222 transitions. [2023-08-23 22:53:44,808 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:53:44,808 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 222 transitions. [2023-08-23 22:53:44,809 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) [2023-08-23 22:53:44,809 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:53:44,809 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:53:44,810 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 177 flow. Second operand 3 states and 222 transitions. [2023-08-23 22:53:44,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 55 transitions, 364 flow [2023-08-23 22:53:44,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 55 transitions, 361 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-23 22:53:44,812 INFO L231 Difference]: Finished difference. Result has 41 places, 36 transitions, 175 flow [2023-08-23 22:53:44,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=171, 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=175, PETRI_PLACES=41, PETRI_TRANSITIONS=36} [2023-08-23 22:53:44,812 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 4 predicate places. [2023-08-23 22:53:44,812 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 36 transitions, 175 flow [2023-08-23 22:53:44,812 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) [2023-08-23 22:53:44,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:53:44,812 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-23 22:53:44,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-08-23 22:53:44,812 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-08-23 22:53:44,813 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:53:44,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1527139999, now seen corresponding path program 1 times [2023-08-23 22:53:44,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:53:44,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810629673] [2023-08-23 22:53:44,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:53:44,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:53:44,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:53:44,829 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-23 22:53:44,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:53:44,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810629673] [2023-08-23 22:53:44,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810629673] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:53:44,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:53:44,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-23 22:53:44,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555899028] [2023-08-23 22:53:44,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:53:44,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-23 22:53:44,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:53:44,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-23 22:53:44,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-23 22:53:44,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-08-23 22:53:44,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 36 transitions, 175 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) [2023-08-23 22:53:44,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:53:44,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-08-23 22:53:44,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:53:45,753 INFO L124 PetriNetUnfolderBase]: 14850/21601 cut-off events. [2023-08-23 22:53:45,753 INFO L125 PetriNetUnfolderBase]: For 20184/20184 co-relation queries the response was YES. [2023-08-23 22:53:45,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61589 conditions, 21601 events. 14850/21601 cut-off events. For 20184/20184 co-relation queries the response was YES. Maximal size of possible extension queue 1651. Compared 150024 event pairs, 6228 based on Foata normal form. 0/18162 useless extension candidates. Maximal degree in co-relation 35418. Up to 14235 conditions per place. [2023-08-23 22:53:45,862 INFO L140 encePairwiseOnDemand]: 144/151 looper letters, 40 selfloop transitions, 17 changer transitions 0/60 dead transitions. [2023-08-23 22:53:45,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 60 transitions, 409 flow [2023-08-23 22:53:45,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-23 22:53:45,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-23 22:53:45,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 221 transitions. [2023-08-23 22:53:45,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4878587196467991 [2023-08-23 22:53:45,863 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 221 transitions. [2023-08-23 22:53:45,863 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 221 transitions. [2023-08-23 22:53:45,863 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:53:45,863 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 221 transitions. [2023-08-23 22:53:45,864 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) [2023-08-23 22:53:45,864 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:53:45,864 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:53:45,864 INFO L175 Difference]: Start difference. First operand has 41 places, 36 transitions, 175 flow. Second operand 3 states and 221 transitions. [2023-08-23 22:53:45,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 60 transitions, 409 flow [2023-08-23 22:53:45,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 60 transitions, 405 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-23 22:53:45,868 INFO L231 Difference]: Finished difference. Result has 44 places, 49 transitions, 347 flow [2023-08-23 22:53:45,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=173, 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=347, PETRI_PLACES=44, PETRI_TRANSITIONS=49} [2023-08-23 22:53:45,869 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 7 predicate places. [2023-08-23 22:53:45,869 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 49 transitions, 347 flow [2023-08-23 22:53:45,869 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) [2023-08-23 22:53:45,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:53:45,869 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:53:45,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-08-23 22:53:45,870 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-08-23 22:53:45,870 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:53:45,870 INFO L85 PathProgramCache]: Analyzing trace with hash -96696211, now seen corresponding path program 1 times [2023-08-23 22:53:45,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:53:45,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416519569] [2023-08-23 22:53:45,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:53:45,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:53:45,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:53:45,953 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-23 22:53:45,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:53:45,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416519569] [2023-08-23 22:53:45,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416519569] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:53:45,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:53:45,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-23 22:53:45,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098210513] [2023-08-23 22:53:45,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:53:45,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-23 22:53:45,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:53:45,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-23 22:53:45,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-23 22:53:45,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-08-23 22:53:45,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 49 transitions, 347 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) [2023-08-23 22:53:45,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:53:45,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-08-23 22:53:45,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:53:46,909 INFO L124 PetriNetUnfolderBase]: 11925/16849 cut-off events. [2023-08-23 22:53:46,910 INFO L125 PetriNetUnfolderBase]: For 28615/28615 co-relation queries the response was YES. [2023-08-23 22:53:46,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59534 conditions, 16849 events. 11925/16849 cut-off events. For 28615/28615 co-relation queries the response was YES. Maximal size of possible extension queue 1331. Compared 110411 event pairs, 2241 based on Foata normal form. 954/15750 useless extension candidates. Maximal degree in co-relation 33950. Up to 13484 conditions per place. [2023-08-23 22:53:46,997 INFO L140 encePairwiseOnDemand]: 149/151 looper letters, 64 selfloop transitions, 4 changer transitions 0/71 dead transitions. [2023-08-23 22:53:46,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 71 transitions, 619 flow [2023-08-23 22:53:46,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-23 22:53:46,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-23 22:53:46,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 219 transitions. [2023-08-23 22:53:46,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48344370860927155 [2023-08-23 22:53:46,998 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 219 transitions. [2023-08-23 22:53:46,998 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 219 transitions. [2023-08-23 22:53:46,998 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:53:46,998 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 219 transitions. [2023-08-23 22:53:46,999 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) [2023-08-23 22:53:46,999 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:53:46,999 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:53:46,999 INFO L175 Difference]: Start difference. First operand has 44 places, 49 transitions, 347 flow. Second operand 3 states and 219 transitions. [2023-08-23 22:53:46,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 71 transitions, 619 flow [2023-08-23 22:53:47,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 71 transitions, 585 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-23 22:53:47,035 INFO L231 Difference]: Finished difference. Result has 43 places, 48 transitions, 317 flow [2023-08-23 22:53:47,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=309, 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=317, PETRI_PLACES=43, PETRI_TRANSITIONS=48} [2023-08-23 22:53:47,036 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 6 predicate places. [2023-08-23 22:53:47,036 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 48 transitions, 317 flow [2023-08-23 22:53:47,036 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) [2023-08-23 22:53:47,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:53:47,036 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:53:47,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-08-23 22:53:47,036 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-08-23 22:53:47,037 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:53:47,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1896232274, now seen corresponding path program 1 times [2023-08-23 22:53:47,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:53:47,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090639489] [2023-08-23 22:53:47,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:53:47,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:53:47,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:53:47,055 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-23 22:53:47,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:53:47,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090639489] [2023-08-23 22:53:47,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090639489] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:53:47,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:53:47,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-23 22:53:47,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341923111] [2023-08-23 22:53:47,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:53:47,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-23 22:53:47,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:53:47,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-23 22:53:47,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-23 22:53:47,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-08-23 22:53:47,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 48 transitions, 317 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) [2023-08-23 22:53:47,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:53:47,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-08-23 22:53:47,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:53:48,046 INFO L124 PetriNetUnfolderBase]: 14852/22111 cut-off events. [2023-08-23 22:53:48,046 INFO L125 PetriNetUnfolderBase]: For 37417/37417 co-relation queries the response was YES. [2023-08-23 22:53:48,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72697 conditions, 22111 events. 14852/22111 cut-off events. For 37417/37417 co-relation queries the response was YES. Maximal size of possible extension queue 1850. Compared 160692 event pairs, 5610 based on Foata normal form. 0/19811 useless extension candidates. Maximal degree in co-relation 41806. Up to 14769 conditions per place. [2023-08-23 22:53:48,168 INFO L140 encePairwiseOnDemand]: 144/151 looper letters, 47 selfloop transitions, 29 changer transitions 0/79 dead transitions. [2023-08-23 22:53:48,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 79 transitions, 684 flow [2023-08-23 22:53:48,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-23 22:53:48,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-23 22:53:48,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 218 transitions. [2023-08-23 22:53:48,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48123620309050774 [2023-08-23 22:53:48,169 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 218 transitions. [2023-08-23 22:53:48,169 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 218 transitions. [2023-08-23 22:53:48,169 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:53:48,169 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 218 transitions. [2023-08-23 22:53:48,169 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) [2023-08-23 22:53:48,170 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:53:48,170 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:53:48,170 INFO L175 Difference]: Start difference. First operand has 43 places, 48 transitions, 317 flow. Second operand 3 states and 218 transitions. [2023-08-23 22:53:48,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 79 transitions, 684 flow [2023-08-23 22:53:48,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 79 transitions, 676 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-23 22:53:48,183 INFO L231 Difference]: Finished difference. Result has 46 places, 69 transitions, 647 flow [2023-08-23 22:53:48,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=313, 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=647, PETRI_PLACES=46, PETRI_TRANSITIONS=69} [2023-08-23 22:53:48,184 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 9 predicate places. [2023-08-23 22:53:48,184 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 69 transitions, 647 flow [2023-08-23 22:53:48,184 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) [2023-08-23 22:53:48,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:53:48,184 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:53:48,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-08-23 22:53:48,184 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-08-23 22:53:48,184 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:53:48,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1346338571, now seen corresponding path program 1 times [2023-08-23 22:53:48,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:53:48,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505596148] [2023-08-23 22:53:48,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:53:48,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:53:48,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:53:48,229 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-23 22:53:48,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:53:48,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505596148] [2023-08-23 22:53:48,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505596148] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:53:48,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:53:48,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-23 22:53:48,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973198713] [2023-08-23 22:53:48,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:53:48,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-23 22:53:48,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:53:48,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-23 22:53:48,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-23 22:53:48,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-08-23 22:53:48,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 69 transitions, 647 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) [2023-08-23 22:53:48,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:53:48,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-08-23 22:53:48,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:53:49,148 INFO L124 PetriNetUnfolderBase]: 11939/17421 cut-off events. [2023-08-23 22:53:49,148 INFO L125 PetriNetUnfolderBase]: For 46459/46459 co-relation queries the response was YES. [2023-08-23 22:53:49,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69793 conditions, 17421 events. 11939/17421 cut-off events. For 46459/46459 co-relation queries the response was YES. Maximal size of possible extension queue 1494. Compared 121189 event pairs, 2639 based on Foata normal form. 1012/17369 useless extension candidates. Maximal degree in co-relation 39980. Up to 13486 conditions per place. [2023-08-23 22:53:49,233 INFO L140 encePairwiseOnDemand]: 149/151 looper letters, 86 selfloop transitions, 8 changer transitions 0/97 dead transitions. [2023-08-23 22:53:49,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 97 transitions, 1070 flow [2023-08-23 22:53:49,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-23 22:53:49,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-23 22:53:49,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 216 transitions. [2023-08-23 22:53:49,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4768211920529801 [2023-08-23 22:53:49,234 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 216 transitions. [2023-08-23 22:53:49,234 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 216 transitions. [2023-08-23 22:53:49,235 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:53:49,235 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 216 transitions. [2023-08-23 22:53:49,235 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) [2023-08-23 22:53:49,235 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:53:49,236 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:53:49,236 INFO L175 Difference]: Start difference. First operand has 46 places, 69 transitions, 647 flow. Second operand 3 states and 216 transitions. [2023-08-23 22:53:49,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 97 transitions, 1070 flow [2023-08-23 22:53:49,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 97 transitions, 1012 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-23 22:53:49,270 INFO L231 Difference]: Finished difference. Result has 45 places, 68 transitions, 601 flow [2023-08-23 22:53:49,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=585, 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=601, PETRI_PLACES=45, PETRI_TRANSITIONS=68} [2023-08-23 22:53:49,270 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 8 predicate places. [2023-08-23 22:53:49,270 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 68 transitions, 601 flow [2023-08-23 22:53:49,271 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) [2023-08-23 22:53:49,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:53:49,271 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:53:49,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-08-23 22:53:49,271 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-08-23 22:53:49,271 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:53:49,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1686687131, now seen corresponding path program 1 times [2023-08-23 22:53:49,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:53:49,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210876010] [2023-08-23 22:53:49,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:53:49,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:53:49,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:53:49,286 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-08-23 22:53:49,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:53:49,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210876010] [2023-08-23 22:53:49,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210876010] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:53:49,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:53:49,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-23 22:53:49,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056136878] [2023-08-23 22:53:49,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:53:49,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-23 22:53:49,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:53:49,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-23 22:53:49,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-23 22:53:49,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-08-23 22:53:49,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 68 transitions, 601 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) [2023-08-23 22:53:49,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:53:49,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-08-23 22:53:49,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:53:50,347 INFO L124 PetriNetUnfolderBase]: 13634/21204 cut-off events. [2023-08-23 22:53:50,347 INFO L125 PetriNetUnfolderBase]: For 53657/53657 co-relation queries the response was YES. [2023-08-23 22:53:50,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79175 conditions, 21204 events. 13634/21204 cut-off events. For 53657/53657 co-relation queries the response was YES. Maximal size of possible extension queue 1973. Compared 163535 event pairs, 5130 based on Foata normal form. 0/20302 useless extension candidates. Maximal degree in co-relation 42601. Up to 14771 conditions per place. [2023-08-23 22:53:50,461 INFO L140 encePairwiseOnDemand]: 144/151 looper letters, 58 selfloop transitions, 49 changer transitions 0/110 dead transitions. [2023-08-23 22:53:50,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 110 transitions, 1211 flow [2023-08-23 22:53:50,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-23 22:53:50,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-23 22:53:50,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 215 transitions. [2023-08-23 22:53:50,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4746136865342163 [2023-08-23 22:53:50,462 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 215 transitions. [2023-08-23 22:53:50,462 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 215 transitions. [2023-08-23 22:53:50,463 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:53:50,463 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 215 transitions. [2023-08-23 22:53:50,463 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) [2023-08-23 22:53:50,463 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:53:50,464 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:53:50,464 INFO L175 Difference]: Start difference. First operand has 45 places, 68 transitions, 601 flow. Second operand 3 states and 215 transitions. [2023-08-23 22:53:50,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 110 transitions, 1211 flow [2023-08-23 22:53:50,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 110 transitions, 1195 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-23 22:53:50,488 INFO L231 Difference]: Finished difference. Result has 48 places, 101 transitions, 1211 flow [2023-08-23 22:53:50,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=593, 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=1211, PETRI_PLACES=48, PETRI_TRANSITIONS=101} [2023-08-23 22:53:50,488 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 11 predicate places. [2023-08-23 22:53:50,488 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 101 transitions, 1211 flow [2023-08-23 22:53:50,488 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) [2023-08-23 22:53:50,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:53:50,488 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:53:50,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2023-08-23 22:53:50,488 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-08-23 22:53:50,489 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:53:50,489 INFO L85 PathProgramCache]: Analyzing trace with hash -747690667, now seen corresponding path program 1 times [2023-08-23 22:53:50,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:53:50,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014517251] [2023-08-23 22:53:50,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:53:50,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:53:50,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:53:50,520 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-08-23 22:53:50,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:53:50,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014517251] [2023-08-23 22:53:50,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014517251] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:53:50,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:53:50,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-23 22:53:50,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713660377] [2023-08-23 22:53:50,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:53:50,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-23 22:53:50,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:53:50,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-23 22:53:50,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-23 22:53:50,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-08-23 22:53:50,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 101 transitions, 1211 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) [2023-08-23 22:53:50,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:53:50,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-08-23 22:53:50,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:53:51,753 INFO L124 PetriNetUnfolderBase]: 11331/18039 cut-off events. [2023-08-23 22:53:51,754 INFO L125 PetriNetUnfolderBase]: For 68413/68413 co-relation queries the response was YES. [2023-08-23 22:53:51,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77880 conditions, 18039 events. 11331/18039 cut-off events. For 68413/68413 co-relation queries the response was YES. Maximal size of possible extension queue 1637. Compared 140773 event pairs, 3585 based on Foata normal form. 862/18861 useless extension candidates. Maximal degree in co-relation 42009. Up to 10940 conditions per place. [2023-08-23 22:53:51,874 INFO L140 encePairwiseOnDemand]: 149/151 looper letters, 118 selfloop transitions, 16 changer transitions 0/137 dead transitions. [2023-08-23 22:53:51,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 137 transitions, 1873 flow [2023-08-23 22:53:51,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-23 22:53:51,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-23 22:53:51,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 213 transitions. [2023-08-23 22:53:51,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47019867549668876 [2023-08-23 22:53:51,876 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 213 transitions. [2023-08-23 22:53:51,876 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 213 transitions. [2023-08-23 22:53:51,876 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:53:51,876 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 213 transitions. [2023-08-23 22:53:51,876 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) [2023-08-23 22:53:51,877 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:53:51,877 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:53:51,877 INFO L175 Difference]: Start difference. First operand has 48 places, 101 transitions, 1211 flow. Second operand 3 states and 213 transitions. [2023-08-23 22:53:51,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 137 transitions, 1873 flow [2023-08-23 22:53:51,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 137 transitions, 1775 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-23 22:53:51,926 INFO L231 Difference]: Finished difference. Result has 47 places, 100 transitions, 1141 flow [2023-08-23 22:53:51,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=1109, 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=1141, PETRI_PLACES=47, PETRI_TRANSITIONS=100} [2023-08-23 22:53:51,927 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 10 predicate places. [2023-08-23 22:53:51,927 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 100 transitions, 1141 flow [2023-08-23 22:53:51,927 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) [2023-08-23 22:53:51,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:53:51,928 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:53:51,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-08-23 22:53:51,928 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)] === [2023-08-23 22:53:51,928 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:53:51,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1707278424, now seen corresponding path program 1 times [2023-08-23 22:53:51,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:53:51,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623560725] [2023-08-23 22:53:51,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:53:51,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:53:51,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-23 22:53:51,936 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-23 22:53:51,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-23 22:53:51,942 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-23 22:53:51,942 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-23 22:53:51,942 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-08-23 22:53:51,942 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2023-08-23 22:53:51,943 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2023-08-23 22:53:51,944 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2023-08-23 22:53:51,944 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2023-08-23 22:53:51,944 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2023-08-23 22:53:51,944 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2023-08-23 22:53:51,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-08-23 22:53:51,944 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:53:51,945 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-23 22:53:51,945 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-08-23 22:53:51,957 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-23 22:53:51,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 112 places, 100 transitions, 260 flow [2023-08-23 22:53:51,966 INFO L124 PetriNetUnfolderBase]: 7/170 cut-off events. [2023-08-23 22:53:51,967 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2023-08-23 22:53:51,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 210 conditions, 170 events. 7/170 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 310 event pairs, 0 based on Foata normal form. 0/150 useless extension candidates. Maximal degree in co-relation 165. Up to 14 conditions per place. [2023-08-23 22:53:51,967 INFO L82 GeneralOperation]: Start removeDead. Operand has 112 places, 100 transitions, 260 flow [2023-08-23 22:53:51,967 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 112 places, 100 transitions, 260 flow [2023-08-23 22:53:51,968 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-23 22:53:51,968 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 112 places, 100 transitions, 260 flow [2023-08-23 22:53:51,968 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 112 places, 100 transitions, 260 flow [2023-08-23 22:53:51,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 112 places, 100 transitions, 260 flow [2023-08-23 22:53:51,977 INFO L124 PetriNetUnfolderBase]: 7/170 cut-off events. [2023-08-23 22:53:51,977 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2023-08-23 22:53:51,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 210 conditions, 170 events. 7/170 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 310 event pairs, 0 based on Foata normal form. 0/150 useless extension candidates. Maximal degree in co-relation 165. Up to 14 conditions per place. [2023-08-23 22:53:51,980 INFO L119 LiptonReduction]: Number of co-enabled transitions 5676 [2023-08-23 22:53:53,157 INFO L134 LiptonReduction]: Checked pairs total: 8233 [2023-08-23 22:53:53,157 INFO L136 LiptonReduction]: Total number of compositions: 71 [2023-08-23 22:53:53,158 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-23 22:53:53,158 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@50c9017a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-23 22:53:53,158 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-08-23 22:53:53,159 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-23 22:53:53,159 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2023-08-23 22:53:53,159 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-23 22:53:53,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:53:53,159 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-23 22:53:53,159 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2023-08-23 22:53:53,159 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:53:53,159 INFO L85 PathProgramCache]: Analyzing trace with hash 853582857, now seen corresponding path program 1 times [2023-08-23 22:53:53,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:53:53,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415077085] [2023-08-23 22:53:53,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:53:53,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:53:53,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:53:53,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:53:53,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:53:53,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415077085] [2023-08-23 22:53:53,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415077085] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:53:53,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:53:53,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-23 22:53:53,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778051387] [2023-08-23 22:53:53,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:53:53,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-23 22:53:53,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:53:53,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-23 22:53:53,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-23 22:53:53,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 171 [2023-08-23 22:53:53,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 30 transitions, 120 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) [2023-08-23 22:53:53,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:53:53,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 171 [2023-08-23 22:53:53,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:53:57,144 INFO L124 PetriNetUnfolderBase]: 62014/82081 cut-off events. [2023-08-23 22:53:57,144 INFO L125 PetriNetUnfolderBase]: For 52408/52408 co-relation queries the response was YES. [2023-08-23 22:53:57,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 180152 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 525164 event pairs, 35952 based on Foata normal form. 0/59906 useless extension candidates. Maximal degree in co-relation 38661. Up to 54027 conditions per place. [2023-08-23 22:53:57,538 INFO L140 encePairwiseOnDemand]: 162/171 looper letters, 41 selfloop transitions, 7 changer transitions 0/51 dead transitions. [2023-08-23 22:53:57,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 51 transitions, 303 flow [2023-08-23 22:53:57,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-23 22:53:57,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-23 22:53:57,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 261 transitions. [2023-08-23 22:53:57,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5087719298245614 [2023-08-23 22:53:57,539 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 261 transitions. [2023-08-23 22:53:57,539 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 261 transitions. [2023-08-23 22:53:57,540 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:53:57,540 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 261 transitions. [2023-08-23 22:53:57,540 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:53:57,541 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:53:57,541 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:53:57,541 INFO L175 Difference]: Start difference. First operand has 43 places, 30 transitions, 120 flow. Second operand 3 states and 261 transitions. [2023-08-23 22:53:57,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 51 transitions, 303 flow [2023-08-23 22:53:57,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 51 transitions, 253 flow, removed 25 selfloop flow, removed 0 redundant places. [2023-08-23 22:53:57,567 INFO L231 Difference]: Finished difference. Result has 46 places, 35 transitions, 142 flow [2023-08-23 22:53:57,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=88, 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=142, PETRI_PLACES=46, PETRI_TRANSITIONS=35} [2023-08-23 22:53:57,568 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2023-08-23 22:53:57,568 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 35 transitions, 142 flow [2023-08-23 22:53:57,568 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) [2023-08-23 22:53:57,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:53:57,568 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:53:57,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2023-08-23 22:53:57,568 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2023-08-23 22:53:57,568 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:53:57,568 INFO L85 PathProgramCache]: Analyzing trace with hash -701240531, now seen corresponding path program 1 times [2023-08-23 22:53:57,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:53:57,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766040984] [2023-08-23 22:53:57,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:53:57,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:53:57,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:53:57,582 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-23 22:53:57,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:53:57,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766040984] [2023-08-23 22:53:57,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766040984] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:53:57,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:53:57,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-23 22:53:57,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094814386] [2023-08-23 22:53:57,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:53:57,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-23 22:53:57,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:53:57,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-23 22:53:57,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-23 22:53:57,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 171 [2023-08-23 22:53:57,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 35 transitions, 142 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) [2023-08-23 22:53:57,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:53:57,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 171 [2023-08-23 22:53:57,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:54:03,888 INFO L124 PetriNetUnfolderBase]: 87642/116859 cut-off events. [2023-08-23 22:54:03,888 INFO L125 PetriNetUnfolderBase]: For 63799/63799 co-relation queries the response was YES. [2023-08-23 22:54:04,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 296134 conditions, 116859 events. 87642/116859 cut-off events. For 63799/63799 co-relation queries the response was YES. Maximal size of possible extension queue 6344. Compared 797094 event pairs, 43070 based on Foata normal form. 0/90803 useless extension candidates. Maximal degree in co-relation 140390. Up to 77979 conditions per place. [2023-08-23 22:54:04,692 INFO L140 encePairwiseOnDemand]: 163/171 looper letters, 46 selfloop transitions, 12 changer transitions 0/61 dead transitions. [2023-08-23 22:54:04,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 61 transitions, 366 flow [2023-08-23 22:54:04,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-23 22:54:04,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-23 22:54:04,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 258 transitions. [2023-08-23 22:54:04,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5029239766081871 [2023-08-23 22:54:04,693 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 258 transitions. [2023-08-23 22:54:04,693 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 258 transitions. [2023-08-23 22:54:04,693 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:54:04,693 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 258 transitions. [2023-08-23 22:54:04,694 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) [2023-08-23 22:54:04,694 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:54:04,694 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:54:04,694 INFO L175 Difference]: Start difference. First operand has 46 places, 35 transitions, 142 flow. Second operand 3 states and 258 transitions. [2023-08-23 22:54:04,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 61 transitions, 366 flow [2023-08-23 22:54:05,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 61 transitions, 340 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-23 22:54:05,898 INFO L231 Difference]: Finished difference. Result has 48 places, 45 transitions, 236 flow [2023-08-23 22:54:05,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=128, 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=236, PETRI_PLACES=48, PETRI_TRANSITIONS=45} [2023-08-23 22:54:05,899 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 5 predicate places. [2023-08-23 22:54:05,899 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 45 transitions, 236 flow [2023-08-23 22:54:05,899 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) [2023-08-23 22:54:05,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:54:05,899 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:54:05,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2023-08-23 22:54:05,899 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2023-08-23 22:54:05,899 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:54:05,899 INFO L85 PathProgramCache]: Analyzing trace with hash -261541993, now seen corresponding path program 1 times [2023-08-23 22:54:05,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:54:05,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535010191] [2023-08-23 22:54:05,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:54:05,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:54:05,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:54:05,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-23 22:54:05,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:54:05,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535010191] [2023-08-23 22:54:05,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535010191] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:54:05,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:54:05,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-23 22:54:05,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981233782] [2023-08-23 22:54:05,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:54:05,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-23 22:54:05,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:54:05,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-23 22:54:05,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-23 22:54:05,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 171 [2023-08-23 22:54:05,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 45 transitions, 236 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) [2023-08-23 22:54:05,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:54:05,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 171 [2023-08-23 22:54:05,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:54:10,965 INFO L124 PetriNetUnfolderBase]: 71236/92293 cut-off events. [2023-08-23 22:54:10,965 INFO L125 PetriNetUnfolderBase]: For 80427/80427 co-relation queries the response was YES. [2023-08-23 22:54:11,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 272367 conditions, 92293 events. 71236/92293 cut-off events. For 80427/80427 co-relation queries the response was YES. Maximal size of possible extension queue 5175. Compared 592847 event pairs, 13780 based on Foata normal form. 0/74045 useless extension candidates. Maximal degree in co-relation 272311. Up to 74462 conditions per place. [2023-08-23 22:54:11,470 INFO L140 encePairwiseOnDemand]: 169/171 looper letters, 65 selfloop transitions, 2 changer transitions 0/70 dead transitions. [2023-08-23 22:54:11,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 70 transitions, 497 flow [2023-08-23 22:54:11,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-23 22:54:11,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-23 22:54:11,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 257 transitions. [2023-08-23 22:54:11,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5009746588693957 [2023-08-23 22:54:11,472 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 257 transitions. [2023-08-23 22:54:11,472 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 257 transitions. [2023-08-23 22:54:11,472 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:54:11,472 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 257 transitions. [2023-08-23 22:54:11,473 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) [2023-08-23 22:54:11,473 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:54:11,473 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:54:11,473 INFO L175 Difference]: Start difference. First operand has 48 places, 45 transitions, 236 flow. Second operand 3 states and 257 transitions. [2023-08-23 22:54:11,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 70 transitions, 497 flow [2023-08-23 22:54:12,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 70 transitions, 461 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-23 22:54:12,582 INFO L231 Difference]: Finished difference. Result has 47 places, 44 transitions, 212 flow [2023-08-23 22:54:12,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=208, 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=212, PETRI_PLACES=47, PETRI_TRANSITIONS=44} [2023-08-23 22:54:12,582 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 4 predicate places. [2023-08-23 22:54:12,582 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 44 transitions, 212 flow [2023-08-23 22:54:12,582 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) [2023-08-23 22:54:12,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:54:12,582 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:54:12,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2023-08-23 22:54:12,582 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2023-08-23 22:54:12,583 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:54:12,583 INFO L85 PathProgramCache]: Analyzing trace with hash -263616779, now seen corresponding path program 1 times [2023-08-23 22:54:12,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:54:12,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823249988] [2023-08-23 22:54:12,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:54:12,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:54:12,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:54:12,610 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-23 22:54:12,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:54:12,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823249988] [2023-08-23 22:54:12,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823249988] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:54:12,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:54:12,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-23 22:54:12,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096687916] [2023-08-23 22:54:12,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:54:12,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-23 22:54:12,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:54:12,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-23 22:54:12,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-23 22:54:12,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 171 [2023-08-23 22:54:12,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 44 transitions, 212 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) [2023-08-23 22:54:12,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:54:12,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 171 [2023-08-23 22:54:12,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:54:16,569 INFO L124 PetriNetUnfolderBase]: 57777/75233 cut-off events. [2023-08-23 22:54:16,569 INFO L125 PetriNetUnfolderBase]: For 53296/53296 co-relation queries the response was YES. [2023-08-23 22:54:16,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 214572 conditions, 75233 events. 57777/75233 cut-off events. For 53296/53296 co-relation queries the response was YES. Maximal size of possible extension queue 4281. Compared 473714 event pairs, 9807 based on Foata normal form. 0/60115 useless extension candidates. Maximal degree in co-relation 113375. Up to 60562 conditions per place. [2023-08-23 22:54:16,958 INFO L140 encePairwiseOnDemand]: 169/171 looper letters, 62 selfloop transitions, 2 changer transitions 0/67 dead transitions. [2023-08-23 22:54:16,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 67 transitions, 446 flow [2023-08-23 22:54:16,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-23 22:54:16,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-23 22:54:16,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 254 transitions. [2023-08-23 22:54:16,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4951267056530214 [2023-08-23 22:54:16,959 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 254 transitions. [2023-08-23 22:54:16,959 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 254 transitions. [2023-08-23 22:54:16,959 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:54:16,959 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 254 transitions. [2023-08-23 22:54:16,960 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) [2023-08-23 22:54:16,960 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:54:16,960 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:54:16,960 INFO L175 Difference]: Start difference. First operand has 47 places, 44 transitions, 212 flow. Second operand 3 states and 254 transitions. [2023-08-23 22:54:16,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 67 transitions, 446 flow [2023-08-23 22:54:16,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 67 transitions, 443 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-23 22:54:16,969 INFO L231 Difference]: Finished difference. Result has 47 places, 43 transitions, 210 flow [2023-08-23 22:54:16,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=206, 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=210, PETRI_PLACES=47, PETRI_TRANSITIONS=43} [2023-08-23 22:54:16,970 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 4 predicate places. [2023-08-23 22:54:16,970 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 43 transitions, 210 flow [2023-08-23 22:54:16,970 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) [2023-08-23 22:54:16,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:54:16,970 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-23 22:54:16,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2023-08-23 22:54:16,970 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2023-08-23 22:54:16,970 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:54:16,970 INFO L85 PathProgramCache]: Analyzing trace with hash 2120622272, now seen corresponding path program 1 times [2023-08-23 22:54:16,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:54:16,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776064732] [2023-08-23 22:54:16,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:54:16,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:54:16,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:54:16,993 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-23 22:54:16,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:54:16,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776064732] [2023-08-23 22:54:16,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776064732] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:54:16,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:54:16,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-23 22:54:16,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078539315] [2023-08-23 22:54:16,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:54:16,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-23 22:54:16,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:54:16,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-23 22:54:16,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-23 22:54:16,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 171 [2023-08-23 22:54:16,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 43 transitions, 210 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) [2023-08-23 22:54:16,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:54:16,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 171 [2023-08-23 22:54:16,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:54:22,970 INFO L124 PetriNetUnfolderBase]: 78368/106611 cut-off events. [2023-08-23 22:54:22,971 INFO L125 PetriNetUnfolderBase]: For 99801/99801 co-relation queries the response was YES. [2023-08-23 22:54:23,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 301471 conditions, 106611 events. 78368/106611 cut-off events. For 99801/99801 co-relation queries the response was YES. Maximal size of possible extension queue 6232. Compared 759267 event pairs, 34508 based on Foata normal form. 0/87014 useless extension candidates. Maximal degree in co-relation 167263. Up to 72725 conditions per place. [2023-08-23 22:54:23,578 INFO L140 encePairwiseOnDemand]: 163/171 looper letters, 50 selfloop transitions, 21 changer transitions 0/74 dead transitions. [2023-08-23 22:54:23,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 74 transitions, 507 flow [2023-08-23 22:54:23,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-23 22:54:23,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-23 22:54:23,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 253 transitions. [2023-08-23 22:54:23,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49317738791423 [2023-08-23 22:54:23,579 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 253 transitions. [2023-08-23 22:54:23,579 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 253 transitions. [2023-08-23 22:54:23,579 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:54:23,579 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 253 transitions. [2023-08-23 22:54:23,581 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) [2023-08-23 22:54:23,581 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:54:23,581 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:54:23,582 INFO L175 Difference]: Start difference. First operand has 47 places, 43 transitions, 210 flow. Second operand 3 states and 253 transitions. [2023-08-23 22:54:23,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 74 transitions, 507 flow [2023-08-23 22:54:23,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 74 transitions, 503 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-23 22:54:23,594 INFO L231 Difference]: Finished difference. Result has 50 places, 60 transitions, 430 flow [2023-08-23 22:54:23,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=208, 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=430, PETRI_PLACES=50, PETRI_TRANSITIONS=60} [2023-08-23 22:54:23,595 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 7 predicate places. [2023-08-23 22:54:23,595 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 60 transitions, 430 flow [2023-08-23 22:54:23,595 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) [2023-08-23 22:54:23,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:54:23,595 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:54:23,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2023-08-23 22:54:23,595 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2023-08-23 22:54:23,595 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:54:23,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1314784524, now seen corresponding path program 1 times [2023-08-23 22:54:23,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:54:23,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432500662] [2023-08-23 22:54:23,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:54:23,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:54:23,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:54:23,615 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-23 22:54:23,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:54:23,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432500662] [2023-08-23 22:54:23,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432500662] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:54:23,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:54:23,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-23 22:54:23,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326988866] [2023-08-23 22:54:23,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:54:23,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-23 22:54:23,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:54:23,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-23 22:54:23,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-23 22:54:23,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 171 [2023-08-23 22:54:23,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 60 transitions, 430 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) [2023-08-23 22:54:23,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:54:23,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 171 [2023-08-23 22:54:23,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:54:28,502 INFO L124 PetriNetUnfolderBase]: 63123/83371 cut-off events. [2023-08-23 22:54:28,502 INFO L125 PetriNetUnfolderBase]: For 140677/140677 co-relation queries the response was YES. [2023-08-23 22:54:28,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 290089 conditions, 83371 events. 63123/83371 cut-off events. For 140677/140677 co-relation queries the response was YES. Maximal size of possible extension queue 5044. Compared 555386 event pairs, 11449 based on Foata normal form. 4008/74526 useless extension candidates. Maximal degree in co-relation 157443. Up to 66634 conditions per place. [2023-08-23 22:54:29,025 INFO L140 encePairwiseOnDemand]: 169/171 looper letters, 82 selfloop transitions, 4 changer transitions 0/89 dead transitions. [2023-08-23 22:54:29,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 89 transitions, 781 flow [2023-08-23 22:54:29,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-23 22:54:29,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-23 22:54:29,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 251 transitions. [2023-08-23 22:54:29,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48927875243664715 [2023-08-23 22:54:29,026 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 251 transitions. [2023-08-23 22:54:29,026 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 251 transitions. [2023-08-23 22:54:29,026 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:54:29,026 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 251 transitions. [2023-08-23 22:54:29,027 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) [2023-08-23 22:54:29,027 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:54:29,027 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:54:29,027 INFO L175 Difference]: Start difference. First operand has 50 places, 60 transitions, 430 flow. Second operand 3 states and 251 transitions. [2023-08-23 22:54:29,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 89 transitions, 781 flow [2023-08-23 22:54:29,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 89 transitions, 739 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-23 22:54:29,427 INFO L231 Difference]: Finished difference. Result has 49 places, 59 transitions, 392 flow [2023-08-23 22:54:29,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=384, 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=392, PETRI_PLACES=49, PETRI_TRANSITIONS=59} [2023-08-23 22:54:29,428 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 6 predicate places. [2023-08-23 22:54:29,428 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 59 transitions, 392 flow [2023-08-23 22:54:29,428 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) [2023-08-23 22:54:29,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:54:29,428 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:54:29,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2023-08-23 22:54:29,428 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2023-08-23 22:54:29,428 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:54:29,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1208238642, now seen corresponding path program 1 times [2023-08-23 22:54:29,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:54:29,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011698003] [2023-08-23 22:54:29,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:54:29,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:54:29,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:54:29,442 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-23 22:54:29,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:54:29,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011698003] [2023-08-23 22:54:29,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011698003] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:54:29,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:54:29,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-23 22:54:29,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804084533] [2023-08-23 22:54:29,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:54:29,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-23 22:54:29,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:54:29,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-23 22:54:29,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-23 22:54:29,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 171 [2023-08-23 22:54:29,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 59 transitions, 392 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) [2023-08-23 22:54:29,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:54:29,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 171 [2023-08-23 22:54:29,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:54:36,011 INFO L124 PetriNetUnfolderBase]: 82894/114621 cut-off events. [2023-08-23 22:54:36,012 INFO L125 PetriNetUnfolderBase]: For 202351/202351 co-relation queries the response was YES. [2023-08-23 22:54:36,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 372683 conditions, 114621 events. 82894/114621 cut-off events. For 202351/202351 co-relation queries the response was YES. Maximal size of possible extension queue 7139. Compared 856344 event pairs, 32594 based on Foata normal form. 0/98741 useless extension candidates. Maximal degree in co-relation 216934. Up to 78927 conditions per place. [2023-08-23 22:54:36,719 INFO L140 encePairwiseOnDemand]: 163/171 looper letters, 61 selfloop transitions, 37 changer transitions 0/101 dead transitions. [2023-08-23 22:54:36,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 101 transitions, 878 flow [2023-08-23 22:54:36,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-23 22:54:36,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-23 22:54:36,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 250 transitions. [2023-08-23 22:54:36,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4873294346978557 [2023-08-23 22:54:36,720 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 250 transitions. [2023-08-23 22:54:36,720 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 250 transitions. [2023-08-23 22:54:36,720 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:54:36,720 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 250 transitions. [2023-08-23 22:54:36,721 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) [2023-08-23 22:54:36,721 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:54:36,721 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:54:36,721 INFO L175 Difference]: Start difference. First operand has 49 places, 59 transitions, 392 flow. Second operand 3 states and 250 transitions. [2023-08-23 22:54:36,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 101 transitions, 878 flow [2023-08-23 22:54:36,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 101 transitions, 870 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-23 22:54:36,771 INFO L231 Difference]: Finished difference. Result has 52 places, 88 transitions, 834 flow [2023-08-23 22:54:36,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=388, 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=834, PETRI_PLACES=52, PETRI_TRANSITIONS=88} [2023-08-23 22:54:36,771 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 9 predicate places. [2023-08-23 22:54:36,771 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 88 transitions, 834 flow [2023-08-23 22:54:36,771 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) [2023-08-23 22:54:36,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:54:36,771 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:54:36,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2023-08-23 22:54:36,771 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2023-08-23 22:54:36,772 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:54:36,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1199311655, now seen corresponding path program 1 times [2023-08-23 22:54:36,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:54:36,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027707368] [2023-08-23 22:54:36,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:54:36,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:54:36,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:54:36,792 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-23 22:54:36,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:54:36,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027707368] [2023-08-23 22:54:36,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027707368] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:54:36,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:54:36,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-23 22:54:36,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766027730] [2023-08-23 22:54:36,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:54:36,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-23 22:54:36,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:54:36,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-23 22:54:36,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-23 22:54:36,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 171 [2023-08-23 22:54:36,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 88 transitions, 834 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) [2023-08-23 22:54:36,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:54:36,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 171 [2023-08-23 22:54:36,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:54:42,453 INFO L124 PetriNetUnfolderBase]: 66491/89377 cut-off events. [2023-08-23 22:54:42,453 INFO L125 PetriNetUnfolderBase]: For 243725/243725 co-relation queries the response was YES. [2023-08-23 22:54:42,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 353392 conditions, 89377 events. 66491/89377 cut-off events. For 243725/243725 co-relation queries the response was YES. Maximal size of possible extension queue 5781. Compared 627164 event pairs, 13367 based on Foata normal form. 4542/84597 useless extension candidates. Maximal degree in co-relation 208656. Up to 70760 conditions per place. [2023-08-23 22:54:43,002 INFO L140 encePairwiseOnDemand]: 169/171 looper letters, 117 selfloop transitions, 8 changer transitions 0/128 dead transitions. [2023-08-23 22:54:43,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 128 transitions, 1420 flow [2023-08-23 22:54:43,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-23 22:54:43,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-23 22:54:43,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 248 transitions. [2023-08-23 22:54:43,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4834307992202729 [2023-08-23 22:54:43,003 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 248 transitions. [2023-08-23 22:54:43,003 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 248 transitions. [2023-08-23 22:54:43,003 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:54:43,003 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 248 transitions. [2023-08-23 22:54:43,003 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) [2023-08-23 22:54:43,004 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:54:43,004 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:54:43,004 INFO L175 Difference]: Start difference. First operand has 52 places, 88 transitions, 834 flow. Second operand 3 states and 248 transitions. [2023-08-23 22:54:43,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 128 transitions, 1420 flow [2023-08-23 22:54:43,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 128 transitions, 1346 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-23 22:54:43,434 INFO L231 Difference]: Finished difference. Result has 51 places, 87 transitions, 772 flow [2023-08-23 22:54:43,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=756, 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=772, PETRI_PLACES=51, PETRI_TRANSITIONS=87} [2023-08-23 22:54:43,435 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 8 predicate places. [2023-08-23 22:54:43,435 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 87 transitions, 772 flow [2023-08-23 22:54:43,435 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) [2023-08-23 22:54:43,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:54:43,435 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:54:43,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2023-08-23 22:54:43,435 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2023-08-23 22:54:43,435 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:54:43,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1049528128, now seen corresponding path program 1 times [2023-08-23 22:54:43,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:54:43,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88826283] [2023-08-23 22:54:43,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:54:43,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:54:43,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:54:43,451 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-08-23 22:54:43,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:54:43,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88826283] [2023-08-23 22:54:43,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88826283] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:54:43,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:54:43,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-23 22:54:43,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899729895] [2023-08-23 22:54:43,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:54:43,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-23 22:54:43,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:54:43,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-23 22:54:43,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-23 22:54:43,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 171 [2023-08-23 22:54:43,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 87 transitions, 772 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) [2023-08-23 22:54:43,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:54:43,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 171 [2023-08-23 22:54:43,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:54:50,843 INFO L124 PetriNetUnfolderBase]: 83744/117939 cut-off events. [2023-08-23 22:54:50,844 INFO L125 PetriNetUnfolderBase]: For 338138/338138 co-relation queries the response was YES. [2023-08-23 22:54:51,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 437267 conditions, 117939 events. 83744/117939 cut-off events. For 338138/338138 co-relation queries the response was YES. Maximal size of possible extension queue 7940. Compared 918723 event pairs, 30074 based on Foata normal form. 0/107390 useless extension candidates. Maximal degree in co-relation 245905. Up to 82253 conditions per place. [2023-08-23 22:54:51,617 INFO L140 encePairwiseOnDemand]: 163/171 looper letters, 80 selfloop transitions, 65 changer transitions 0/148 dead transitions. [2023-08-23 22:54:51,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 148 transitions, 1629 flow [2023-08-23 22:54:51,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-23 22:54:51,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-23 22:54:51,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 247 transitions. [2023-08-23 22:54:51,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2023-08-23 22:54:51,619 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 247 transitions. [2023-08-23 22:54:51,619 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 247 transitions. [2023-08-23 22:54:51,619 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:54:51,619 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 247 transitions. [2023-08-23 22:54:51,619 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) [2023-08-23 22:54:51,620 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:54:51,620 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:54:51,620 INFO L175 Difference]: Start difference. First operand has 51 places, 87 transitions, 772 flow. Second operand 3 states and 247 transitions. [2023-08-23 22:54:51,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 148 transitions, 1629 flow [2023-08-23 22:54:51,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 148 transitions, 1613 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-23 22:54:51,750 INFO L231 Difference]: Finished difference. Result has 54 places, 136 transitions, 1638 flow [2023-08-23 22:54:51,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=764, 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=1638, PETRI_PLACES=54, PETRI_TRANSITIONS=136} [2023-08-23 22:54:51,750 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 11 predicate places. [2023-08-23 22:54:51,750 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 136 transitions, 1638 flow [2023-08-23 22:54:51,750 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) [2023-08-23 22:54:51,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:54:51,750 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:54:51,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2023-08-23 22:54:51,751 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2023-08-23 22:54:51,751 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:54:51,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1824370623, now seen corresponding path program 1 times [2023-08-23 22:54:51,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:54:51,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598632406] [2023-08-23 22:54:51,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:54:51,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:54:51,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:54:51,770 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-08-23 22:54:51,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:54:51,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598632406] [2023-08-23 22:54:51,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598632406] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:54:51,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:54:51,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-23 22:54:51,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132329183] [2023-08-23 22:54:51,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:54:51,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-23 22:54:51,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:54:51,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-23 22:54:51,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-23 22:54:51,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 171 [2023-08-23 22:54:51,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 136 transitions, 1638 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) [2023-08-23 22:54:51,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:54:51,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 171 [2023-08-23 22:54:51,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:54:58,303 INFO L124 PetriNetUnfolderBase]: 67349/92869 cut-off events. [2023-08-23 22:54:58,304 INFO L125 PetriNetUnfolderBase]: For 378525/378525 co-relation queries the response was YES. [2023-08-23 22:54:58,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 412575 conditions, 92869 events. 67349/92869 cut-off events. For 378525/378525 co-relation queries the response was YES. Maximal size of possible extension queue 6428. Compared 687339 event pairs, 15691 based on Foata normal form. 4796/92936 useless extension candidates. Maximal degree in co-relation 225959. Up to 70802 conditions per place. [2023-08-23 22:54:58,928 INFO L140 encePairwiseOnDemand]: 169/171 looper letters, 175 selfloop transitions, 16 changer transitions 0/194 dead transitions. [2023-08-23 22:54:58,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 194 transitions, 2657 flow [2023-08-23 22:54:58,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-23 22:54:58,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-23 22:54:58,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 245 transitions. [2023-08-23 22:54:58,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4775828460038986 [2023-08-23 22:54:58,930 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 245 transitions. [2023-08-23 22:54:58,930 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 245 transitions. [2023-08-23 22:54:58,930 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:54:58,930 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 245 transitions. [2023-08-23 22:54:58,930 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) [2023-08-23 22:54:58,931 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:54:58,931 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:54:58,931 INFO L175 Difference]: Start difference. First operand has 54 places, 136 transitions, 1638 flow. Second operand 3 states and 245 transitions. [2023-08-23 22:54:58,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 194 transitions, 2657 flow [2023-08-23 22:54:59,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 194 transitions, 2527 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-23 22:54:59,604 INFO L231 Difference]: Finished difference. Result has 53 places, 135 transitions, 1536 flow [2023-08-23 22:54:59,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=1504, 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=1536, PETRI_PLACES=53, PETRI_TRANSITIONS=135} [2023-08-23 22:54:59,605 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 10 predicate places. [2023-08-23 22:54:59,605 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 135 transitions, 1536 flow [2023-08-23 22:54:59,605 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) [2023-08-23 22:54:59,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:54:59,605 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:54:59,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2023-08-23 22:54:59,605 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2023-08-23 22:54:59,606 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:54:59,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1427917098, now seen corresponding path program 1 times [2023-08-23 22:54:59,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:54:59,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8954908] [2023-08-23 22:54:59,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:54:59,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:54:59,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:54:59,619 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-08-23 22:54:59,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:54:59,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8954908] [2023-08-23 22:54:59,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8954908] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:54:59,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:54:59,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-23 22:54:59,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257637793] [2023-08-23 22:54:59,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:54:59,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-23 22:54:59,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:54:59,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-23 22:54:59,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-23 22:54:59,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 171 [2023-08-23 22:54:59,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 135 transitions, 1536 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) [2023-08-23 22:54:59,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:54:59,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 171 [2023-08-23 22:54:59,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:55:07,868 INFO L124 PetriNetUnfolderBase]: 78886/114494 cut-off events. [2023-08-23 22:55:07,869 INFO L125 PetriNetUnfolderBase]: For 460187/460187 co-relation queries the response was YES. [2023-08-23 22:55:08,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 478503 conditions, 114494 events. 78886/114494 cut-off events. For 460187/460187 co-relation queries the response was YES. Maximal size of possible extension queue 8549. Compared 939167 event pairs, 27980 based on Foata normal form. 0/110251 useless extension candidates. Maximal degree in co-relation 272772. Up to 83371 conditions per place. [2023-08-23 22:55:08,908 INFO L140 encePairwiseOnDemand]: 163/171 looper letters, 111 selfloop transitions, 113 changer transitions 0/227 dead transitions. [2023-08-23 22:55:08,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 227 transitions, 3084 flow [2023-08-23 22:55:08,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-23 22:55:08,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-23 22:55:08,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 244 transitions. [2023-08-23 22:55:08,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4756335282651072 [2023-08-23 22:55:08,909 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 244 transitions. [2023-08-23 22:55:08,909 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 244 transitions. [2023-08-23 22:55:08,909 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:55:08,909 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 244 transitions. [2023-08-23 22:55:08,910 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) [2023-08-23 22:55:08,910 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:55:08,911 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:55:08,911 INFO L175 Difference]: Start difference. First operand has 53 places, 135 transitions, 1536 flow. Second operand 3 states and 244 transitions. [2023-08-23 22:55:08,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 227 transitions, 3084 flow [2023-08-23 22:55:09,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 227 transitions, 3052 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-23 22:55:09,355 INFO L231 Difference]: Finished difference. Result has 56 places, 216 transitions, 3178 flow [2023-08-23 22:55:09,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=1520, 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=3178, PETRI_PLACES=56, PETRI_TRANSITIONS=216} [2023-08-23 22:55:09,356 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 13 predicate places. [2023-08-23 22:55:09,356 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 216 transitions, 3178 flow [2023-08-23 22:55:09,356 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) [2023-08-23 22:55:09,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:55:09,356 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:55:09,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2023-08-23 22:55:09,356 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2023-08-23 22:55:09,357 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:55:09,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1315761961, now seen corresponding path program 1 times [2023-08-23 22:55:09,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:55:09,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240696640] [2023-08-23 22:55:09,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:55:09,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:55:09,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:55:09,379 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-08-23 22:55:09,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:55:09,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240696640] [2023-08-23 22:55:09,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240696640] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:55:09,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:55:09,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-23 22:55:09,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989434755] [2023-08-23 22:55:09,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:55:09,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-23 22:55:09,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:55:09,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-23 22:55:09,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-23 22:55:09,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 171 [2023-08-23 22:55:09,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 216 transitions, 3178 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) [2023-08-23 22:55:09,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:55:09,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 171 [2023-08-23 22:55:09,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:55:16,772 INFO L124 PetriNetUnfolderBase]: 65645/97131 cut-off events. [2023-08-23 22:55:16,772 INFO L125 PetriNetUnfolderBase]: For 544589/544589 co-relation queries the response was YES. [2023-08-23 22:55:17,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 463006 conditions, 97131 events. 65645/97131 cut-off events. For 544589/544589 co-relation queries the response was YES. Maximal size of possible extension queue 7103. Compared 809606 event pairs, 20879 based on Foata normal form. 4122/101132 useless extension candidates. Maximal degree in co-relation 264226. Up to 58024 conditions per place. [2023-08-23 22:55:17,624 INFO L140 encePairwiseOnDemand]: 169/171 looper letters, 266 selfloop transitions, 32 changer transitions 0/301 dead transitions. [2023-08-23 22:55:17,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 301 transitions, 4937 flow [2023-08-23 22:55:17,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-23 22:55:17,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-23 22:55:17,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 242 transitions. [2023-08-23 22:55:17,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47173489278752434 [2023-08-23 22:55:17,625 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 242 transitions. [2023-08-23 22:55:17,625 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 242 transitions. [2023-08-23 22:55:17,625 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:55:17,625 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 242 transitions. [2023-08-23 22:55:17,626 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) [2023-08-23 22:55:17,626 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:55:17,626 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:55:17,626 INFO L175 Difference]: Start difference. First operand has 56 places, 216 transitions, 3178 flow. Second operand 3 states and 242 transitions. [2023-08-23 22:55:17,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 301 transitions, 4937 flow [2023-08-23 22:55:18,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 301 transitions, 4711 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-23 22:55:18,159 INFO L231 Difference]: Finished difference. Result has 55 places, 215 transitions, 3012 flow [2023-08-23 22:55:18,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=2948, 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=3012, PETRI_PLACES=55, PETRI_TRANSITIONS=215} [2023-08-23 22:55:18,160 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 12 predicate places. [2023-08-23 22:55:18,160 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 215 transitions, 3012 flow [2023-08-23 22:55:18,161 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) [2023-08-23 22:55:18,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:55:18,161 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:55:18,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2023-08-23 22:55:18,161 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)] === [2023-08-23 22:55:18,161 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:55:18,161 INFO L85 PathProgramCache]: Analyzing trace with hash 2129659553, now seen corresponding path program 1 times [2023-08-23 22:55:18,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:55:18,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092827821] [2023-08-23 22:55:18,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:55:18,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:55:18,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-23 22:55:18,168 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-23 22:55:18,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-23 22:55:18,175 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-23 22:55:18,175 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-23 22:55:18,175 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 8 remaining) [2023-08-23 22:55:18,175 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 8 remaining) [2023-08-23 22:55:18,175 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 8 remaining) [2023-08-23 22:55:18,176 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 8 remaining) [2023-08-23 22:55:18,176 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 8 remaining) [2023-08-23 22:55:18,176 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 8 remaining) [2023-08-23 22:55:18,176 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 8 remaining) [2023-08-23 22:55:18,176 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 8 remaining) [2023-08-23 22:55:18,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2023-08-23 22:55:18,176 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:55:18,176 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-23 22:55:18,176 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2023-08-23 22:55:18,189 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-23 22:55:18,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 126 places, 112 transitions, 301 flow [2023-08-23 22:55:18,199 INFO L124 PetriNetUnfolderBase]: 8/194 cut-off events. [2023-08-23 22:55:18,199 INFO L125 PetriNetUnfolderBase]: For 77/77 co-relation queries the response was YES. [2023-08-23 22:55:18,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 244 conditions, 194 events. 8/194 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 386 event pairs, 0 based on Foata normal form. 0/171 useless extension candidates. Maximal degree in co-relation 197. Up to 16 conditions per place. [2023-08-23 22:55:18,200 INFO L82 GeneralOperation]: Start removeDead. Operand has 126 places, 112 transitions, 301 flow [2023-08-23 22:55:18,200 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 126 places, 112 transitions, 301 flow [2023-08-23 22:55:18,200 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-23 22:55:18,200 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 126 places, 112 transitions, 301 flow [2023-08-23 22:55:18,200 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 126 places, 112 transitions, 301 flow [2023-08-23 22:55:18,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 126 places, 112 transitions, 301 flow [2023-08-23 22:55:18,210 INFO L124 PetriNetUnfolderBase]: 8/194 cut-off events. [2023-08-23 22:55:18,210 INFO L125 PetriNetUnfolderBase]: For 77/77 co-relation queries the response was YES. [2023-08-23 22:55:18,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 244 conditions, 194 events. 8/194 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 386 event pairs, 0 based on Foata normal form. 0/171 useless extension candidates. Maximal degree in co-relation 197. Up to 16 conditions per place. [2023-08-23 22:55:18,214 INFO L119 LiptonReduction]: Number of co-enabled transitions 7546 [2023-08-23 22:55:19,447 INFO L134 LiptonReduction]: Checked pairs total: 12943 [2023-08-23 22:55:19,447 INFO L136 LiptonReduction]: Total number of compositions: 79 [2023-08-23 22:55:19,448 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-23 22:55:19,448 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@50c9017a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-23 22:55:19,448 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2023-08-23 22:55:19,449 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-23 22:55:19,449 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2023-08-23 22:55:19,449 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-23 22:55:19,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:55:19,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-23 22:55:19,449 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2023-08-23 22:55:19,449 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:55:19,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1047119421, now seen corresponding path program 1 times [2023-08-23 22:55:19,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:55:19,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760949667] [2023-08-23 22:55:19,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:55:19,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:55:19,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:55:19,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:55:19,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:55:19,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760949667] [2023-08-23 22:55:19,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760949667] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:55:19,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:55:19,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-23 22:55:19,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269673498] [2023-08-23 22:55:19,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:55:19,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-23 22:55:19,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:55:19,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-23 22:55:19,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-23 22:55:19,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 191 [2023-08-23 22:55:19,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 34 transitions, 145 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) [2023-08-23 22:55:19,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:55:19,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 191 [2023-08-23 22:55:19,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:55:38,231 INFO L124 PetriNetUnfolderBase]: 297494/377965 cut-off events. [2023-08-23 22:55:38,231 INFO L125 PetriNetUnfolderBase]: For 287847/287847 co-relation queries the response was YES. [2023-08-23 22:55:38,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 832316 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 2473201 event pairs, 176580 based on Foata normal form. 0/272848 useless extension candidates. Maximal degree in co-relation 183188. Up to 254687 conditions per place. [2023-08-23 22:55:40,419 INFO L140 encePairwiseOnDemand]: 181/191 looper letters, 48 selfloop transitions, 8 changer transitions 0/59 dead transitions. [2023-08-23 22:55:40,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 59 transitions, 367 flow [2023-08-23 22:55:40,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-23 22:55:40,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-23 22:55:40,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 293 transitions. [2023-08-23 22:55:40,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5113438045375218 [2023-08-23 22:55:40,421 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 293 transitions. [2023-08-23 22:55:40,421 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 293 transitions. [2023-08-23 22:55:40,421 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:55:40,421 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 293 transitions. [2023-08-23 22:55:40,421 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 97.66666666666667) internal successors, (293), 3 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:55:40,422 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:55:40,422 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:55:40,422 INFO L175 Difference]: Start difference. First operand has 49 places, 34 transitions, 145 flow. Second operand 3 states and 293 transitions. [2023-08-23 22:55:40,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 59 transitions, 367 flow [2023-08-23 22:55:40,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 59 transitions, 295 flow, removed 36 selfloop flow, removed 0 redundant places. [2023-08-23 22:55:40,561 INFO L231 Difference]: Finished difference. Result has 52 places, 40 transitions, 163 flow [2023-08-23 22:55:40,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=101, 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=163, PETRI_PLACES=52, PETRI_TRANSITIONS=40} [2023-08-23 22:55:40,561 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 3 predicate places. [2023-08-23 22:55:40,561 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 40 transitions, 163 flow [2023-08-23 22:55:40,562 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) [2023-08-23 22:55:40,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:55:40,562 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:55:40,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2023-08-23 22:55:40,562 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2023-08-23 22:55:40,562 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:55:40,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1309768385, now seen corresponding path program 1 times [2023-08-23 22:55:40,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:55:40,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979349150] [2023-08-23 22:55:40,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:55:40,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:55:40,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:55:40,573 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-23 22:55:40,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:55:40,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979349150] [2023-08-23 22:55:40,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979349150] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:55:40,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:55:40,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-23 22:55:40,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428585827] [2023-08-23 22:55:40,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:55:40,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-23 22:55:40,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:55:40,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-23 22:55:40,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-23 22:55:40,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 191 [2023-08-23 22:55:40,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 40 transitions, 163 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) [2023-08-23 22:55:40,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:55:40,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 191 [2023-08-23 22:55:40,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:56:12,457 INFO L124 PetriNetUnfolderBase]: 423576/541309 cut-off events. [2023-08-23 22:56:12,457 INFO L125 PetriNetUnfolderBase]: For 286495/286495 co-relation queries the response was YES. [2023-08-23 22:56:13,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1365244 conditions, 541309 events. 423576/541309 cut-off events. For 286495/286495 co-relation queries the response was YES. Maximal size of possible extension queue 23989. Compared 3735900 event pairs, 215810 based on Foata normal form. 0/413115 useless extension candidates. Maximal degree in co-relation 647466. Up to 370121 conditions per place. [2023-08-23 22:56:16,397 INFO L140 encePairwiseOnDemand]: 182/191 looper letters, 54 selfloop transitions, 14 changer transitions 0/71 dead transitions. [2023-08-23 22:56:16,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 71 transitions, 428 flow [2023-08-23 22:56:16,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-23 22:56:16,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-23 22:56:16,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 290 transitions. [2023-08-23 22:56:16,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.506108202443281 [2023-08-23 22:56:16,399 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 290 transitions. [2023-08-23 22:56:16,399 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 290 transitions. [2023-08-23 22:56:16,399 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:56:16,399 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 290 transitions. [2023-08-23 22:56:16,402 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) [2023-08-23 22:56:16,408 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:56:16,409 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:56:16,409 INFO L175 Difference]: Start difference. First operand has 52 places, 40 transitions, 163 flow. Second operand 3 states and 290 transitions. [2023-08-23 22:56:16,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 71 transitions, 428 flow [2023-08-23 22:56:56,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 71 transitions, 398 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-23 22:56:56,909 INFO L231 Difference]: Finished difference. Result has 54 places, 52 transitions, 275 flow [2023-08-23 22:56:56,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=275, PETRI_PLACES=54, PETRI_TRANSITIONS=52} [2023-08-23 22:56:56,909 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 5 predicate places. [2023-08-23 22:56:56,909 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 52 transitions, 275 flow [2023-08-23 22:56:56,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has 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) [2023-08-23 22:56:56,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:56:56,909 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:56:56,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2023-08-23 22:56:56,910 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2023-08-23 22:56:56,910 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:56:56,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1945745256, now seen corresponding path program 1 times [2023-08-23 22:56:56,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:56:56,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361341059] [2023-08-23 22:56:56,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:56:56,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:56:56,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:56:56,936 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-23 22:56:56,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:56:56,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361341059] [2023-08-23 22:56:56,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361341059] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:56:56,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:56:56,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-23 22:56:56,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302967166] [2023-08-23 22:56:56,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:56:56,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-23 22:56:56,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:56:56,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-23 22:56:56,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-23 22:56:56,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 191 [2023-08-23 22:56:56,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 52 transitions, 275 flow. Second operand has 4 states, 4 states have (on average 79.75) internal successors, (319), 4 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:56:56,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:56:56,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 191 [2023-08-23 22:56:56,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:57:20,724 INFO L124 PetriNetUnfolderBase]: 345272/429917 cut-off events. [2023-08-23 22:57:20,724 INFO L125 PetriNetUnfolderBase]: For 362722/362722 co-relation queries the response was YES. [2023-08-23 22:57:22,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1258871 conditions, 429917 events. 345272/429917 cut-off events. For 362722/362722 co-relation queries the response was YES. Maximal size of possible extension queue 19479. Compared 2779549 event pairs, 66448 based on Foata normal form. 0/337171 useless extension candidates. Maximal degree in co-relation 1258814. Up to 345956 conditions per place. [2023-08-23 22:57:23,854 INFO L140 encePairwiseOnDemand]: 189/191 looper letters, 77 selfloop transitions, 2 changer transitions 0/82 dead transitions. [2023-08-23 22:57:23,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 82 transitions, 585 flow [2023-08-23 22:57:23,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-23 22:57:23,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-23 22:57:23,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 289 transitions. [2023-08-23 22:57:23,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5043630017452007 [2023-08-23 22:57:23,855 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 289 transitions. [2023-08-23 22:57:23,855 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 289 transitions. [2023-08-23 22:57:23,855 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:57:23,855 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 289 transitions. [2023-08-23 22:57:23,856 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 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) [2023-08-23 22:57:23,856 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:57:23,856 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:57:23,856 INFO L175 Difference]: Start difference. First operand has 54 places, 52 transitions, 275 flow. Second operand 3 states and 289 transitions. [2023-08-23 22:57:23,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 82 transitions, 585 flow [2023-08-23 22:57:54,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 82 transitions, 543 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-23 22:57:54,847 INFO L231 Difference]: Finished difference. Result has 53 places, 51 transitions, 247 flow [2023-08-23 22:57:54,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=247, PETRI_PLACES=53, PETRI_TRANSITIONS=51} [2023-08-23 22:57:54,847 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 4 predicate places. [2023-08-23 22:57:54,847 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 51 transitions, 247 flow [2023-08-23 22:57:54,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 79.75) internal successors, (319), 4 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:57:54,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:57:54,848 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:57:54,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2023-08-23 22:57:54,848 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2023-08-23 22:57:54,848 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:57:54,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1948110235, now seen corresponding path program 1 times [2023-08-23 22:57:54,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:57:54,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459350455] [2023-08-23 22:57:54,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:57:54,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:57:54,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:57:54,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-23 22:57:54,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:57:54,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459350455] [2023-08-23 22:57:54,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459350455] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:57:54,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:57:54,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-23 22:57:54,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555680373] [2023-08-23 22:57:54,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:57:54,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-23 22:57:54,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:57:54,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-23 22:57:54,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-23 22:57:54,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 191 [2023-08-23 22:57:54,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 51 transitions, 247 flow. Second operand has 4 states, 4 states have (on average 79.75) internal successors, (319), 4 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:57:54,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:57:54,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 191 [2023-08-23 22:57:54,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:58:14,770 INFO L124 PetriNetUnfolderBase]: 280909/351017 cut-off events. [2023-08-23 22:58:14,770 INFO L125 PetriNetUnfolderBase]: For 239234/239234 co-relation queries the response was YES. [2023-08-23 22:58:15,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 992745 conditions, 351017 events. 280909/351017 cut-off events. For 239234/239234 co-relation queries the response was YES. Maximal size of possible extension queue 16167. Compared 2229218 event pairs, 48119 based on Foata normal form. 0/274201 useless extension candidates. Maximal degree in co-relation 532135. Up to 281912 conditions per place. [2023-08-23 22:58:17,000 INFO L140 encePairwiseOnDemand]: 189/191 looper letters, 74 selfloop transitions, 2 changer transitions 0/79 dead transitions. [2023-08-23 22:58:17,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 79 transitions, 528 flow [2023-08-23 22:58:17,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-23 22:58:17,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-23 22:58:17,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 286 transitions. [2023-08-23 22:58:17,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49912739965095987 [2023-08-23 22:58:17,001 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 286 transitions. [2023-08-23 22:58:17,001 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 286 transitions. [2023-08-23 22:58:17,001 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:58:17,001 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 286 transitions. [2023-08-23 22:58:17,001 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:58:17,002 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:58:17,002 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:58:17,002 INFO L175 Difference]: Start difference. First operand has 53 places, 51 transitions, 247 flow. Second operand 3 states and 286 transitions. [2023-08-23 22:58:17,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 79 transitions, 528 flow [2023-08-23 22:58:17,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 79 transitions, 525 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-23 22:58:17,035 INFO L231 Difference]: Finished difference. Result has 53 places, 50 transitions, 245 flow [2023-08-23 22:58:17,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=241, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=245, PETRI_PLACES=53, PETRI_TRANSITIONS=50} [2023-08-23 22:58:17,035 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 4 predicate places. [2023-08-23 22:58:17,035 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 50 transitions, 245 flow [2023-08-23 22:58:17,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 79.75) internal successors, (319), 4 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:58:17,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:58:17,035 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-23 22:58:17,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2023-08-23 22:58:17,035 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2023-08-23 22:58:17,035 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:58:17,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1211223203, now seen corresponding path program 1 times [2023-08-23 22:58:17,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:58:17,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052589706] [2023-08-23 22:58:17,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:58:17,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:58:17,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:58:17,050 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-23 22:58:17,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:58:17,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052589706] [2023-08-23 22:58:17,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052589706] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:58:17,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:58:17,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-23 22:58:17,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454840801] [2023-08-23 22:58:17,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:58:17,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-23 22:58:17,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:58:17,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-23 22:58:17,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-23 22:58:17,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 191 [2023-08-23 22:58:17,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 50 transitions, 245 flow. Second operand has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:58:17,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:58:17,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 191 [2023-08-23 22:58:17,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:58:46,190 INFO L124 PetriNetUnfolderBase]: 385656/500287 cut-off events. [2023-08-23 22:58:46,191 INFO L125 PetriNetUnfolderBase]: For 463772/463772 co-relation queries the response was YES. [2023-08-23 22:58:47,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1404945 conditions, 500287 events. 385656/500287 cut-off events. For 463772/463772 co-relation queries the response was YES. Maximal size of possible extension queue 23419. Compared 3597143 event pairs, 176836 based on Foata normal form. 0/398680 useless extension candidates. Maximal degree in co-relation 759541. Up to 349769 conditions per place. [2023-08-23 22:58:49,740 INFO L140 encePairwiseOnDemand]: 182/191 looper letters, 60 selfloop transitions, 25 changer transitions 0/88 dead transitions. [2023-08-23 22:58:49,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 88 transitions, 605 flow [2023-08-23 22:58:49,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-23 22:58:49,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-23 22:58:49,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 285 transitions. [2023-08-23 22:58:49,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4973821989528796 [2023-08-23 22:58:49,741 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 285 transitions. [2023-08-23 22:58:49,741 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 285 transitions. [2023-08-23 22:58:49,741 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:58:49,741 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 285 transitions. [2023-08-23 22:58:49,741 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:58:49,742 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:58:49,742 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:58:49,742 INFO L175 Difference]: Start difference. First operand has 53 places, 50 transitions, 245 flow. Second operand 3 states and 285 transitions. [2023-08-23 22:58:49,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 88 transitions, 605 flow [2023-08-23 22:58:50,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 88 transitions, 601 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-23 22:58:50,991 INFO L231 Difference]: Finished difference. Result has 56 places, 71 transitions, 513 flow [2023-08-23 22:58:50,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=513, PETRI_PLACES=56, PETRI_TRANSITIONS=71} [2023-08-23 22:58:50,991 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 7 predicate places. [2023-08-23 22:58:50,991 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 71 transitions, 513 flow [2023-08-23 22:58:50,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:58:50,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:58:50,992 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:58:50,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2023-08-23 22:58:50,992 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2023-08-23 22:58:50,992 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:58:50,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1106781706, now seen corresponding path program 1 times [2023-08-23 22:58:50,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:58:50,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278005817] [2023-08-23 22:58:50,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:58:50,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:58:50,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:58:51,008 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-23 22:58:51,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:58:51,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278005817] [2023-08-23 22:58:51,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278005817] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:58:51,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:58:51,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-23 22:58:51,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889551703] [2023-08-23 22:58:51,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:58:51,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-23 22:58:51,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:58:51,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-23 22:58:51,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-23 22:58:51,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 191 [2023-08-23 22:58:51,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 71 transitions, 513 flow. Second operand has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:58:51,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:58:51,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 191 [2023-08-23 22:58:51,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:59:16,434 INFO L124 PetriNetUnfolderBase]: 311645/393393 cut-off events. [2023-08-23 22:59:16,434 INFO L125 PetriNetUnfolderBase]: For 652015/652015 co-relation queries the response was YES. [2023-08-23 22:59:17,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1350528 conditions, 393393 events. 311645/393393 cut-off events. For 652015/652015 co-relation queries the response was YES. Maximal size of possible extension queue 19046. Compared 2620483 event pairs, 55633 based on Foata normal form. 16278/339366 useless extension candidates. Maximal degree in co-relation 675481. Up to 313668 conditions per place. [2023-08-23 22:59:19,232 INFO L140 encePairwiseOnDemand]: 189/191 looper letters, 100 selfloop transitions, 4 changer transitions 0/107 dead transitions. [2023-08-23 22:59:19,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 107 transitions, 943 flow [2023-08-23 22:59:19,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-23 22:59:19,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-23 22:59:19,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 283 transitions. [2023-08-23 22:59:19,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.493891797556719 [2023-08-23 22:59:19,233 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 283 transitions. [2023-08-23 22:59:19,233 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 283 transitions. [2023-08-23 22:59:19,233 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:59:19,233 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 283 transitions. [2023-08-23 22:59:19,233 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:59:19,234 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:59:19,234 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:59:19,234 INFO L175 Difference]: Start difference. First operand has 56 places, 71 transitions, 513 flow. Second operand 3 states and 283 transitions. [2023-08-23 22:59:19,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 107 transitions, 943 flow [2023-08-23 22:59:25,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 107 transitions, 893 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-23 22:59:25,917 INFO L231 Difference]: Finished difference. Result has 55 places, 70 transitions, 467 flow [2023-08-23 22:59:25,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=459, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=467, PETRI_PLACES=55, PETRI_TRANSITIONS=70} [2023-08-23 22:59:25,917 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 6 predicate places. [2023-08-23 22:59:25,917 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 70 transitions, 467 flow [2023-08-23 22:59:25,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:59:25,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:59:25,917 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:59:25,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2023-08-23 22:59:25,917 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2023-08-23 22:59:25,918 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:59:25,918 INFO L85 PathProgramCache]: Analyzing trace with hash -112241581, now seen corresponding path program 1 times [2023-08-23 22:59:25,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:59:25,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115106477] [2023-08-23 22:59:25,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:59:25,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:59:25,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:59:25,929 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-23 22:59:25,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:59:25,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115106477] [2023-08-23 22:59:25,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115106477] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:59:25,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:59:25,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-23 22:59:25,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177739284] [2023-08-23 22:59:25,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:59:25,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-23 22:59:25,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:59:25,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-23 22:59:25,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-23 22:59:25,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 191 [2023-08-23 22:59:25,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 70 transitions, 467 flow. Second operand has 3 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) [2023-08-23 22:59:25,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:59:25,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 191 [2023-08-23 22:59:25,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 23:00:00,396 INFO L124 PetriNetUnfolderBase]: 417794/548677 cut-off events. [2023-08-23 23:00:00,396 INFO L125 PetriNetUnfolderBase]: For 983585/983585 co-relation queries the response was YES. [2023-08-23 23:00:01,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1767727 conditions, 548677 events. 417794/548677 cut-off events. For 983585/983585 co-relation queries the response was YES. Maximal size of possible extension queue 26916. Compared 4121705 event pairs, 172730 based on Foata normal form. 0/458425 useless extension candidates. Maximal degree in co-relation 983136. Up to 387351 conditions per place. [2023-08-23 23:00:04,466 INFO L140 encePairwiseOnDemand]: 182/191 looper letters, 75 selfloop transitions, 45 changer transitions 0/123 dead transitions. [2023-08-23 23:00:04,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 123 transitions, 1072 flow [2023-08-23 23:00:04,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-23 23:00:04,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-23 23:00:04,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 282 transitions. [2023-08-23 23:00:04,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49214659685863876 [2023-08-23 23:00:04,467 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 282 transitions. [2023-08-23 23:00:04,467 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 282 transitions. [2023-08-23 23:00:04,467 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 23:00:04,467 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 282 transitions. [2023-08-23 23:00:04,468 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 94.0) internal successors, (282), 3 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 23:00:04,468 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 23:00:04,468 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 23:00:04,468 INFO L175 Difference]: Start difference. First operand has 55 places, 70 transitions, 467 flow. Second operand 3 states and 282 transitions. [2023-08-23 23:00:04,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 123 transitions, 1072 flow [2023-08-23 23:00:04,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 123 transitions, 1064 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-23 23:00:04,989 INFO L231 Difference]: Finished difference. Result has 58 places, 107 transitions, 1021 flow [2023-08-23 23:00:04,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=463, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1021, PETRI_PLACES=58, PETRI_TRANSITIONS=107} [2023-08-23 23:00:04,989 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 9 predicate places. [2023-08-23 23:00:04,989 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 107 transitions, 1021 flow [2023-08-23 23:00:04,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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) [2023-08-23 23:00:04,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 23:00:04,989 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 23:00:04,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2023-08-23 23:00:04,989 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2023-08-23 23:00:04,990 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 23:00:04,990 INFO L85 PathProgramCache]: Analyzing trace with hash 815483311, now seen corresponding path program 1 times [2023-08-23 23:00:04,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 23:00:04,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472266380] [2023-08-23 23:00:04,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 23:00:04,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 23:00:04,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 23:00:05,016 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-23 23:00:05,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 23:00:05,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472266380] [2023-08-23 23:00:05,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472266380] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 23:00:05,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 23:00:05,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-23 23:00:05,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284738705] [2023-08-23 23:00:05,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 23:00:05,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-23 23:00:05,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 23:00:05,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-23 23:00:05,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-23 23:00:05,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 191 [2023-08-23 23:00:05,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 107 transitions, 1021 flow. Second operand has 4 states, 4 states have (on average 80.25) internal successors, (321), 4 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 23:00:05,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 23:00:05,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 191 [2023-08-23 23:00:05,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 23:00:34,198 INFO L124 PetriNetUnfolderBase]: 335923/429061 cut-off events. [2023-08-23 23:00:34,198 INFO L125 PetriNetUnfolderBase]: For 1173031/1173031 co-relation queries the response was YES. [2023-08-23 23:00:35,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1670367 conditions, 429061 events. 335923/429061 cut-off events. For 1173031/1173031 co-relation queries the response was YES. Maximal size of possible extension queue 21877. Compared 3002326 event pairs, 64967 based on Foata normal form. 18824/389225 useless extension candidates. Maximal degree in co-relation 947173. Up to 340086 conditions per place. [2023-08-23 23:00:37,562 INFO L140 encePairwiseOnDemand]: 189/191 looper letters, 147 selfloop transitions, 8 changer transitions 0/158 dead transitions. [2023-08-23 23:00:37,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 158 transitions, 1758 flow [2023-08-23 23:00:37,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-23 23:00:37,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-23 23:00:37,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 280 transitions. [2023-08-23 23:00:37,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4886561954624782 [2023-08-23 23:00:37,563 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 280 transitions. [2023-08-23 23:00:37,563 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 280 transitions. [2023-08-23 23:00:37,563 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 23:00:37,563 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 280 transitions. [2023-08-23 23:00:37,563 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 23:00:37,564 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 23:00:37,564 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 23:00:37,564 INFO L175 Difference]: Start difference. First operand has 58 places, 107 transitions, 1021 flow. Second operand 3 states and 280 transitions. [2023-08-23 23:00:37,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 158 transitions, 1758 flow [2023-08-23 23:00:47,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 158 transitions, 1668 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-23 23:00:47,045 INFO L231 Difference]: Finished difference. Result has 57 places, 106 transitions, 943 flow [2023-08-23 23:00:47,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=927, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=943, PETRI_PLACES=57, PETRI_TRANSITIONS=106} [2023-08-23 23:00:47,045 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 8 predicate places. [2023-08-23 23:00:47,045 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 106 transitions, 943 flow [2023-08-23 23:00:47,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 80.25) internal successors, (321), 4 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 23:00:47,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 23:00:47,046 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 23:00:47,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2023-08-23 23:00:47,046 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2023-08-23 23:00:47,046 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 23:00:47,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1371215118, now seen corresponding path program 1 times [2023-08-23 23:00:47,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 23:00:47,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846274991] [2023-08-23 23:00:47,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 23:00:47,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 23:00:47,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 23:00:47,067 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-08-23 23:00:47,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 23:00:47,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846274991] [2023-08-23 23:00:47,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846274991] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 23:00:47,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 23:00:47,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-23 23:00:47,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836269412] [2023-08-23 23:00:47,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 23:00:47,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-23 23:00:47,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 23:00:47,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-23 23:00:47,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-23 23:00:47,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 191 [2023-08-23 23:00:47,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 106 transitions, 943 flow. Second operand has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 23:00:47,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 23:00:47,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 191 [2023-08-23 23:00:47,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 23:01:29,131 INFO L124 PetriNetUnfolderBase]: 439672/585215 cut-off events. [2023-08-23 23:01:29,131 INFO L125 PetriNetUnfolderBase]: For 1746645/1746645 co-relation queries the response was YES. [2023-08-23 23:01:30,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2143905 conditions, 585215 events. 439672/585215 cut-off events. For 1746645/1746645 co-relation queries the response was YES. Maximal size of possible extension queue 30348. Compared 4591998 event pairs, 165426 based on Foata normal form. 0/513184 useless extension candidates. Maximal degree in co-relation 1260964. Up to 416353 conditions per place. [2023-08-23 23:01:34,400 INFO L140 encePairwiseOnDemand]: 182/191 looper letters, 102 selfloop transitions, 81 changer transitions 0/186 dead transitions. [2023-08-23 23:01:34,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 186 transitions, 2047 flow [2023-08-23 23:01:34,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-23 23:01:34,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-23 23:01:34,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 279 transitions. [2023-08-23 23:01:34,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4869109947643979 [2023-08-23 23:01:34,401 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 279 transitions. [2023-08-23 23:01:34,401 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 279 transitions. [2023-08-23 23:01:34,401 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 23:01:34,401 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 279 transitions. [2023-08-23 23:01:34,401 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 93.0) internal successors, (279), 3 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 23:01:34,402 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 23:01:34,402 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 23:01:34,402 INFO L175 Difference]: Start difference. First operand has 57 places, 106 transitions, 943 flow. Second operand 3 states and 279 transitions. [2023-08-23 23:01:34,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 186 transitions, 2047 flow [2023-08-23 23:01:36,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 186 transitions, 2031 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-23 23:01:36,282 INFO L231 Difference]: Finished difference. Result has 60 places, 171 transitions, 2065 flow [2023-08-23 23:01:36,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=935, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2065, PETRI_PLACES=60, PETRI_TRANSITIONS=171} [2023-08-23 23:01:36,282 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 11 predicate places. [2023-08-23 23:01:36,282 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 171 transitions, 2065 flow [2023-08-23 23:01:36,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 23:01:36,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 23:01:36,283 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 23:01:36,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2023-08-23 23:01:36,283 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2023-08-23 23:01:36,283 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 23:01:36,283 INFO L85 PathProgramCache]: Analyzing trace with hash -441998740, now seen corresponding path program 1 times [2023-08-23 23:01:36,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 23:01:36,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7904043] [2023-08-23 23:01:36,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 23:01:36,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 23:01:36,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 23:01:36,496 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-08-23 23:01:36,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 23:01:36,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7904043] [2023-08-23 23:01:36,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7904043] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 23:01:36,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 23:01:36,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-23 23:01:36,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588967869] [2023-08-23 23:01:36,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 23:01:36,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-23 23:01:36,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 23:01:36,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-23 23:01:36,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-23 23:01:36,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 191 [2023-08-23 23:01:36,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 171 transitions, 2065 flow. Second operand has 4 states, 4 states have (on average 80.5) internal successors, (322), 4 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 23:01:36,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 23:01:36,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 191 [2023-08-23 23:01:36,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 23:02:14,316 INFO L124 PetriNetUnfolderBase]: 352515/456751 cut-off events. [2023-08-23 23:02:14,316 INFO L125 PetriNetUnfolderBase]: For 1894027/1894027 co-relation queries the response was YES. [2023-08-23 23:02:15,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2002634 conditions, 456751 events. 352515/456751 cut-off events. For 1894027/1894027 co-relation queries the response was YES. Maximal size of possible extension queue 24658. Compared 3350621 event pairs, 75003 based on Foata normal form. 21018/435972 useless extension candidates. Maximal degree in co-relation 1200912. Up to 358436 conditions per place. [2023-08-23 23:02:17,942 INFO L140 encePairwiseOnDemand]: 189/191 looper letters, 230 selfloop transitions, 16 changer transitions 0/249 dead transitions. [2023-08-23 23:02:17,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 249 transitions, 3409 flow [2023-08-23 23:02:17,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-23 23:02:17,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-23 23:02:17,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 277 transitions. [2023-08-23 23:02:17,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48342059336823734 [2023-08-23 23:02:17,943 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 277 transitions. [2023-08-23 23:02:17,943 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 277 transitions. [2023-08-23 23:02:17,943 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 23:02:17,943 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 277 transitions. [2023-08-23 23:02:17,943 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 92.33333333333333) internal successors, (277), 3 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 23:02:17,944 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 23:02:17,944 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 23:02:17,944 INFO L175 Difference]: Start difference. First operand has 60 places, 171 transitions, 2065 flow. Second operand 3 states and 277 transitions. [2023-08-23 23:02:17,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 249 transitions, 3409 flow [2023-08-23 23:02:36,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 249 transitions, 3247 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-23 23:02:36,557 INFO L231 Difference]: Finished difference. Result has 59 places, 170 transitions, 1931 flow [2023-08-23 23:02:36,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=1899, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1931, PETRI_PLACES=59, PETRI_TRANSITIONS=170} [2023-08-23 23:02:36,557 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 10 predicate places. [2023-08-23 23:02:36,557 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 170 transitions, 1931 flow [2023-08-23 23:02:36,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 80.5) internal successors, (322), 4 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 23:02:36,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 23:02:36,557 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 23:02:36,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2023-08-23 23:02:36,557 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2023-08-23 23:02:36,558 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 23:02:36,558 INFO L85 PathProgramCache]: Analyzing trace with hash 203506646, now seen corresponding path program 1 times [2023-08-23 23:02:36,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 23:02:36,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125129420] [2023-08-23 23:02:36,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 23:02:36,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 23:02:36,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 23:02:36,585 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-08-23 23:02:36,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 23:02:36,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125129420] [2023-08-23 23:02:36,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125129420] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 23:02:36,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 23:02:36,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-23 23:02:36,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394846392] [2023-08-23 23:02:36,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 23:02:36,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-23 23:02:36,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 23:02:36,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-23 23:02:36,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-23 23:02:36,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 191 [2023-08-23 23:02:36,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 170 transitions, 1931 flow. Second operand has 3 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) [2023-08-23 23:02:36,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 23:02:36,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 191 [2023-08-23 23:02:36,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 23:03:27,353 INFO L124 PetriNetUnfolderBase]: 446618/603309 cut-off events. [2023-08-23 23:03:27,353 INFO L125 PetriNetUnfolderBase]: For 2696997/2696997 co-relation queries the response was YES. [2023-08-23 23:03:29,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2496893 conditions, 603309 events. 446618/603309 cut-off events. For 2696997/2696997 co-relation queries the response was YES. Maximal size of possible extension queue 33492. Compared 4922277 event pairs, 155580 based on Foata normal form. 0/555789 useless extension candidates. Maximal degree in co-relation 1380402. Up to 434515 conditions per place. [2023-08-23 23:03:32,300 INFO L140 encePairwiseOnDemand]: 182/191 looper letters, 149 selfloop transitions, 145 changer transitions 0/297 dead transitions. [2023-08-23 23:03:32,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 297 transitions, 4014 flow [2023-08-23 23:03:32,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-23 23:03:32,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-23 23:03:32,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 276 transitions. [2023-08-23 23:03:32,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4816753926701571 [2023-08-23 23:03:32,301 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 276 transitions. [2023-08-23 23:03:32,301 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 276 transitions. [2023-08-23 23:03:32,301 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 23:03:32,301 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 276 transitions. [2023-08-23 23:03:32,305 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 23:03:32,306 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 23:03:32,306 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 23:03:32,306 INFO L175 Difference]: Start difference. First operand has 59 places, 170 transitions, 1931 flow. Second operand 3 states and 276 transitions. [2023-08-23 23:03:32,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 297 transitions, 4014 flow [2023-08-23 23:03:40,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 297 transitions, 3982 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-23 23:03:40,074 INFO L231 Difference]: Finished difference. Result has 62 places, 283 transitions, 4149 flow [2023-08-23 23:03:40,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=1915, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=4149, PETRI_PLACES=62, PETRI_TRANSITIONS=283} [2023-08-23 23:03:40,074 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 13 predicate places. [2023-08-23 23:03:40,074 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 283 transitions, 4149 flow [2023-08-23 23:03:40,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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) [2023-08-23 23:03:40,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 23:03:40,075 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 23:03:40,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2023-08-23 23:03:40,075 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2023-08-23 23:03:40,075 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 23:03:40,075 INFO L85 PathProgramCache]: Analyzing trace with hash 2013744086, now seen corresponding path program 1 times [2023-08-23 23:03:40,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 23:03:40,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883484677] [2023-08-23 23:03:40,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 23:03:40,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 23:03:40,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 23:03:40,106 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-08-23 23:03:40,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 23:03:40,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883484677] [2023-08-23 23:03:40,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883484677] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 23:03:40,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 23:03:40,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-23 23:03:40,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168456797] [2023-08-23 23:03:40,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 23:03:40,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-23 23:03:40,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 23:03:40,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-23 23:03:40,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-23 23:03:40,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 191 [2023-08-23 23:03:40,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 283 transitions, 4149 flow. Second operand has 4 states, 4 states have (on average 80.75) internal successors, (323), 4 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 23:03:40,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 23:03:40,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 191 [2023-08-23 23:03:40,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 23:04:23,423 INFO L124 PetriNetUnfolderBase]: 359425/475499 cut-off events. [2023-08-23 23:04:23,424 INFO L125 PetriNetUnfolderBase]: For 2820359/2820359 co-relation queries the response was YES. [2023-08-23 23:04:24,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2324265 conditions, 475499 events. 359425/475499 cut-off events. For 2820359/2820359 co-relation queries the response was YES. Maximal size of possible extension queue 27202. Compared 3668505 event pairs, 88685 based on Foata normal form. 22068/476641 useless extension candidates. Maximal degree in co-relation 1263246. Up to 358302 conditions per place. [2023-08-23 23:04:27,385 INFO L140 encePairwiseOnDemand]: 189/191 looper letters, 372 selfloop transitions, 32 changer transitions 0/407 dead transitions. [2023-08-23 23:04:27,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 407 transitions, 6640 flow [2023-08-23 23:04:27,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-23 23:04:27,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-23 23:04:27,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 274 transitions. [2023-08-23 23:04:27,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4781849912739965 [2023-08-23 23:04:27,386 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 274 transitions. [2023-08-23 23:04:27,386 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 274 transitions. [2023-08-23 23:04:27,386 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 23:04:27,386 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 274 transitions. [2023-08-23 23:04:27,386 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 91.33333333333333) internal successors, (274), 3 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 23:04:27,387 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 23:04:27,387 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 23:04:27,387 INFO L175 Difference]: Start difference. First operand has 62 places, 283 transitions, 4149 flow. Second operand 3 states and 274 transitions. [2023-08-23 23:04:27,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 407 transitions, 6640 flow Received shutdown request... [2023-08-23 23:04:40,473 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-23 23:04:41,484 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Cannot interrupt operation gracefully because timeout expired. Forcing shutdown