/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf --rcfgbuilder.only.consider.context.switches.at.boundaries.of.atomic.blocks true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-ext/39_rand_lock_p0_vs.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 11:22:34,550 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 11:22:34,640 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2023-11-17 11:22:34,670 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 11:22:34,671 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 11:22:34,672 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 11:22:34,672 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 11:22:34,673 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 11:22:34,673 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 11:22:34,677 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 11:22:34,678 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 11:22:34,678 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 11:22:34,678 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 11:22:34,679 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 11:22:34,680 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 11:22:34,680 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 11:22:34,680 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 11:22:34,680 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 11:22:34,680 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 11:22:34,681 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 11:22:34,681 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 11:22:34,682 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 11:22:34,682 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 11:22:34,682 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 11:22:34,682 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 11:22:34,682 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 11:22:34,684 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 11:22:34,684 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 11:22:34,684 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 11:22:34,684 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 11:22:34,685 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 11:22:34,685 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 11:22:34,686 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Only consider context switches at boundaries of atomic blocks -> true [2023-11-17 11:22:34,950 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 11:22:34,984 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 11:22:34,986 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 11:22:34,987 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 11:22:34,988 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 11:22:34,989 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/39_rand_lock_p0_vs.i [2023-11-17 11:22:36,317 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 11:22:36,624 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 11:22:36,629 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/39_rand_lock_p0_vs.i [2023-11-17 11:22:36,651 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b6655d93a/cb3910d2d43841c1bc8e43085ed745f8/FLAGde1ca9bd9 [2023-11-17 11:22:36,671 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b6655d93a/cb3910d2d43841c1bc8e43085ed745f8 [2023-11-17 11:22:36,674 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 11:22:36,675 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 11:22:36,676 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 11:22:36,676 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 11:22:36,680 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 11:22:36,681 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 11:22:36" (1/1) ... [2023-11-17 11:22:36,682 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d88b91a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:22:36, skipping insertion in model container [2023-11-17 11:22:36,682 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 11:22:36" (1/1) ... [2023-11-17 11:22:36,737 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 11:22:36,931 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-17 11:22:37,097 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/39_rand_lock_p0_vs.i[30959,30972] [2023-11-17 11:22:37,123 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 11:22:37,134 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 11:22:37,160 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-17 11:22:37,184 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/39_rand_lock_p0_vs.i[30959,30972] [2023-11-17 11:22:37,188 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 11:22:37,222 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 11:22:37,222 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 11:22:37,222 WARN L675 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 11:22:37,229 INFO L206 MainTranslator]: Completed translation [2023-11-17 11:22:37,230 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:22:37 WrapperNode [2023-11-17 11:22:37,230 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 11:22:37,232 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 11:22:37,232 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 11:22:37,232 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 11:22:37,238 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:22:37" (1/1) ... [2023-11-17 11:22:37,269 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:22:37" (1/1) ... [2023-11-17 11:22:37,296 INFO L138 Inliner]: procedures = 176, calls = 21, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 75 [2023-11-17 11:22:37,297 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 11:22:37,297 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 11:22:37,297 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 11:22:37,298 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 11:22:37,305 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:22:37" (1/1) ... [2023-11-17 11:22:37,305 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:22:37" (1/1) ... [2023-11-17 11:22:37,313 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:22:37" (1/1) ... [2023-11-17 11:22:37,314 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:22:37" (1/1) ... [2023-11-17 11:22:37,329 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:22:37" (1/1) ... [2023-11-17 11:22:37,333 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:22:37" (1/1) ... [2023-11-17 11:22:37,334 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:22:37" (1/1) ... [2023-11-17 11:22:37,335 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:22:37" (1/1) ... [2023-11-17 11:22:37,337 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 11:22:37,338 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 11:22:37,338 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 11:22:37,338 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 11:22:37,339 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:22:37" (1/1) ... [2023-11-17 11:22:37,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 11:22:37,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:22:37,373 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-17 11:22:37,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-17 11:22:37,414 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-17 11:22:37,415 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-17 11:22:37,415 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 11:22:37,416 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-17 11:22:37,416 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 11:22:37,416 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 11:22:37,416 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 11:22:37,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 11:22:37,416 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-17 11:22:37,416 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 11:22:37,417 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 11:22:37,418 WARN L211 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-17 11:22:37,540 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 11:22:37,542 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 11:22:37,713 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 11:22:37,819 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 11:22:37,820 INFO L307 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-17 11:22:37,821 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 11:22:37 BoogieIcfgContainer [2023-11-17 11:22:37,821 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 11:22:37,823 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 11:22:37,824 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 11:22:37,827 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 11:22:37,827 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 11:22:36" (1/3) ... [2023-11-17 11:22:37,828 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77cb685e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 11:22:37, skipping insertion in model container [2023-11-17 11:22:37,828 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:22:37" (2/3) ... [2023-11-17 11:22:37,828 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77cb685e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 11:22:37, skipping insertion in model container [2023-11-17 11:22:37,828 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 11:22:37" (3/3) ... [2023-11-17 11:22:37,829 INFO L112 eAbstractionObserver]: Analyzing ICFG 39_rand_lock_p0_vs.i [2023-11-17 11:22:37,846 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 11:22:37,847 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 11:22:37,847 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 11:22:37,881 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:22:37,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 20 places, 20 transitions, 44 flow [2023-11-17 11:22:37,935 INFO L124 PetriNetUnfolderBase]: 3/22 cut-off events. [2023-11-17 11:22:37,935 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:22:37,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26 conditions, 22 events. 3/22 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 21 event pairs, 0 based on Foata normal form. 0/16 useless extension candidates. Maximal degree in co-relation 17. Up to 2 conditions per place. [2023-11-17 11:22:37,939 INFO L82 GeneralOperation]: Start removeDead. Operand has 20 places, 20 transitions, 44 flow [2023-11-17 11:22:37,943 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 20 places, 20 transitions, 44 flow [2023-11-17 11:22:37,946 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:22:37,958 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 20 places, 20 transitions, 44 flow [2023-11-17 11:22:37,960 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 20 places, 20 transitions, 44 flow [2023-11-17 11:22:37,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 20 places, 20 transitions, 44 flow [2023-11-17 11:22:37,969 INFO L124 PetriNetUnfolderBase]: 3/22 cut-off events. [2023-11-17 11:22:37,970 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:22:37,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26 conditions, 22 events. 3/22 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 21 event pairs, 0 based on Foata normal form. 0/16 useless extension candidates. Maximal degree in co-relation 17. Up to 2 conditions per place. [2023-11-17 11:22:37,971 INFO L119 LiptonReduction]: Number of co-enabled transitions 112 [2023-11-17 11:22:38,697 INFO L134 LiptonReduction]: Checked pairs total: 140 [2023-11-17 11:22:38,697 INFO L136 LiptonReduction]: Total number of compositions: 16 [2023-11-17 11:22:38,715 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:22:38,720 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@634a95b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:22:38,721 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-17 11:22:38,723 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:22:38,723 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2023-11-17 11:22:38,723 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:22:38,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:22:38,724 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 11:22:38,724 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-17 11:22:38,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:22:38,729 INFO L85 PathProgramCache]: Analyzing trace with hash 7416644, now seen corresponding path program 1 times [2023-11-17 11:22:38,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:22:38,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271102725] [2023-11-17 11:22:38,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:22:38,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:22:38,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:22:38,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:22:38,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:22:38,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271102725] [2023-11-17 11:22:38,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271102725] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:22:38,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:22:38,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 11:22:38,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583663444] [2023-11-17 11:22:38,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:22:38,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:22:38,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:22:39,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:22:39,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:22:39,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 36 [2023-11-17 11:22:39,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 12 places, 10 transitions, 24 flow. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:39,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:22:39,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 36 [2023-11-17 11:22:39,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:22:39,060 INFO L124 PetriNetUnfolderBase]: 7/19 cut-off events. [2023-11-17 11:22:39,060 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:22:39,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42 conditions, 19 events. 7/19 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 23 event pairs, 2 based on Foata normal form. 0/16 useless extension candidates. Maximal degree in co-relation 30. Up to 13 conditions per place. [2023-11-17 11:22:39,063 INFO L140 encePairwiseOnDemand]: 32/36 looper letters, 7 selfloop transitions, 2 changer transitions 0/10 dead transitions. [2023-11-17 11:22:39,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 12 places, 10 transitions, 42 flow [2023-11-17 11:22:39,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:22:39,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:22:39,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 21 transitions. [2023-11-17 11:22:39,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.19444444444444445 [2023-11-17 11:22:39,076 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 21 transitions. [2023-11-17 11:22:39,076 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 21 transitions. [2023-11-17 11:22:39,077 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:22:39,079 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 21 transitions. [2023-11-17 11:22:39,081 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:39,086 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:39,087 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:39,089 INFO L175 Difference]: Start difference. First operand has 12 places, 10 transitions, 24 flow. Second operand 3 states and 21 transitions. [2023-11-17 11:22:39,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 12 places, 10 transitions, 42 flow [2023-11-17 11:22:39,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 12 places, 10 transitions, 42 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 11:22:39,095 INFO L231 Difference]: Finished difference. Result has 12 places, 8 transitions, 24 flow [2023-11-17 11:22:39,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=20, PETRI_DIFFERENCE_MINUEND_PLACES=10, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=8, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=24, PETRI_PLACES=12, PETRI_TRANSITIONS=8} [2023-11-17 11:22:39,107 INFO L281 CegarLoopForPetriNet]: 12 programPoint places, 0 predicate places. [2023-11-17 11:22:39,107 INFO L495 AbstractCegarLoop]: Abstraction has has 12 places, 8 transitions, 24 flow [2023-11-17 11:22:39,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:39,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:22:39,108 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-17 11:22:39,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 11:22:39,108 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-17 11:22:39,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:22:39,111 INFO L85 PathProgramCache]: Analyzing trace with hash -1462568589, now seen corresponding path program 1 times [2023-11-17 11:22:39,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:22:39,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339889169] [2023-11-17 11:22:39,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:22:39,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:22:39,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:22:39,158 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:22:39,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:22:39,195 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:22:39,196 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:22:39,198 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-11-17 11:22:39,200 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-11-17 11:22:39,201 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-11-17 11:22:39,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 11:22:39,201 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 11:22:39,205 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:22:39,205 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-17 11:22:39,230 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:22:39,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 34 places, 35 transitions, 80 flow [2023-11-17 11:22:39,257 INFO L124 PetriNetUnfolderBase]: 6/40 cut-off events. [2023-11-17 11:22:39,258 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 11:22:39,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 40 events. 6/40 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 70 event pairs, 0 based on Foata normal form. 0/29 useless extension candidates. Maximal degree in co-relation 31. Up to 3 conditions per place. [2023-11-17 11:22:39,259 INFO L82 GeneralOperation]: Start removeDead. Operand has 34 places, 35 transitions, 80 flow [2023-11-17 11:22:39,260 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 34 places, 35 transitions, 80 flow [2023-11-17 11:22:39,260 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:22:39,260 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 34 places, 35 transitions, 80 flow [2023-11-17 11:22:39,260 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 34 places, 35 transitions, 80 flow [2023-11-17 11:22:39,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 34 places, 35 transitions, 80 flow [2023-11-17 11:22:39,275 INFO L124 PetriNetUnfolderBase]: 6/40 cut-off events. [2023-11-17 11:22:39,275 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 11:22:39,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 40 events. 6/40 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 70 event pairs, 0 based on Foata normal form. 0/29 useless extension candidates. Maximal degree in co-relation 31. Up to 3 conditions per place. [2023-11-17 11:22:39,277 INFO L119 LiptonReduction]: Number of co-enabled transitions 644 [2023-11-17 11:22:40,080 INFO L134 LiptonReduction]: Checked pairs total: 1293 [2023-11-17 11:22:40,081 INFO L136 LiptonReduction]: Total number of compositions: 27 [2023-11-17 11:22:40,083 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:22:40,084 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@634a95b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:22:40,084 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-17 11:22:40,086 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:22:40,086 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2023-11-17 11:22:40,086 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:22:40,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:22:40,087 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 11:22:40,087 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-17 11:22:40,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:22:40,087 INFO L85 PathProgramCache]: Analyzing trace with hash 8987082, now seen corresponding path program 1 times [2023-11-17 11:22:40,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:22:40,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93311811] [2023-11-17 11:22:40,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:22:40,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:22:40,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:22:40,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:22:40,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:22:40,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93311811] [2023-11-17 11:22:40,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93311811] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:22:40,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:22:40,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 11:22:40,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817191250] [2023-11-17 11:22:40,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:22:40,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:22:40,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:22:40,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:22:40,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:22:40,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 62 [2023-11-17 11:22:40,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 22 transitions, 54 flow. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:40,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:22:40,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 62 [2023-11-17 11:22:40,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:22:40,262 INFO L124 PetriNetUnfolderBase]: 155/262 cut-off events. [2023-11-17 11:22:40,262 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2023-11-17 11:22:40,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 542 conditions, 262 events. 155/262 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 808 event pairs, 46 based on Foata normal form. 0/217 useless extension candidates. Maximal degree in co-relation 266. Up to 167 conditions per place. [2023-11-17 11:22:40,267 INFO L140 encePairwiseOnDemand]: 53/62 looper letters, 25 selfloop transitions, 3 changer transitions 0/29 dead transitions. [2023-11-17 11:22:40,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 29 transitions, 129 flow [2023-11-17 11:22:40,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:22:40,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:22:40,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 53 transitions. [2023-11-17 11:22:40,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2849462365591398 [2023-11-17 11:22:40,270 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 53 transitions. [2023-11-17 11:22:40,270 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 53 transitions. [2023-11-17 11:22:40,270 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:22:40,270 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 53 transitions. [2023-11-17 11:22:40,271 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:40,272 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 62.0) internal successors, (248), 4 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:40,272 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 62.0) internal successors, (248), 4 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:40,272 INFO L175 Difference]: Start difference. First operand has 22 places, 22 transitions, 54 flow. Second operand 3 states and 53 transitions. [2023-11-17 11:22:40,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 29 transitions, 129 flow [2023-11-17 11:22:40,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 29 transitions, 129 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 11:22:40,273 INFO L231 Difference]: Finished difference. Result has 24 places, 20 transitions, 67 flow [2023-11-17 11:22:40,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=67, PETRI_PLACES=24, PETRI_TRANSITIONS=20} [2023-11-17 11:22:40,274 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 2 predicate places. [2023-11-17 11:22:40,275 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 20 transitions, 67 flow [2023-11-17 11:22:40,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:40,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:22:40,275 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2023-11-17 11:22:40,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 11:22:40,275 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-17 11:22:40,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:22:40,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1128126790, now seen corresponding path program 1 times [2023-11-17 11:22:40,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:22:40,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16966443] [2023-11-17 11:22:40,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:22:40,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:22:40,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:22:40,298 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:22:40,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:22:40,317 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:22:40,317 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:22:40,317 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-11-17 11:22:40,317 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-11-17 11:22:40,318 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-11-17 11:22:40,318 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-11-17 11:22:40,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 11:22:40,318 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 11:22:40,319 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:22:40,319 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-17 11:22:40,351 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:22:40,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 48 places, 50 transitions, 118 flow [2023-11-17 11:22:40,366 INFO L124 PetriNetUnfolderBase]: 9/58 cut-off events. [2023-11-17 11:22:40,366 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-17 11:22:40,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71 conditions, 58 events. 9/58 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 130 event pairs, 0 based on Foata normal form. 0/42 useless extension candidates. Maximal degree in co-relation 47. Up to 4 conditions per place. [2023-11-17 11:22:40,367 INFO L82 GeneralOperation]: Start removeDead. Operand has 48 places, 50 transitions, 118 flow [2023-11-17 11:22:40,368 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 48 places, 50 transitions, 118 flow [2023-11-17 11:22:40,368 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:22:40,368 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 48 places, 50 transitions, 118 flow [2023-11-17 11:22:40,369 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 48 places, 50 transitions, 118 flow [2023-11-17 11:22:40,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 48 places, 50 transitions, 118 flow [2023-11-17 11:22:40,377 INFO L124 PetriNetUnfolderBase]: 9/58 cut-off events. [2023-11-17 11:22:40,377 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-17 11:22:40,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71 conditions, 58 events. 9/58 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 130 event pairs, 0 based on Foata normal form. 0/42 useless extension candidates. Maximal degree in co-relation 47. Up to 4 conditions per place. [2023-11-17 11:22:40,381 INFO L119 LiptonReduction]: Number of co-enabled transitions 1596 [2023-11-17 11:22:41,479 INFO L134 LiptonReduction]: Checked pairs total: 3301 [2023-11-17 11:22:41,479 INFO L136 LiptonReduction]: Total number of compositions: 40 [2023-11-17 11:22:41,483 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:22:41,484 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@634a95b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:22:41,485 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-17 11:22:41,487 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:22:41,487 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2023-11-17 11:22:41,487 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:22:41,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:22:41,487 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 11:22:41,487 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 11:22:41,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:22:41,488 INFO L85 PathProgramCache]: Analyzing trace with hash 11357909, now seen corresponding path program 1 times [2023-11-17 11:22:41,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:22:41,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535892945] [2023-11-17 11:22:41,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:22:41,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:22:41,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:22:41,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:22:41,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:22:41,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535892945] [2023-11-17 11:22:41,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535892945] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:22:41,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:22:41,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 11:22:41,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653280025] [2023-11-17 11:22:41,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:22:41,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:22:41,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:22:41,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:22:41,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:22:41,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 90 [2023-11-17 11:22:41,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 30 transitions, 78 flow. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:41,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:22:41,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 90 [2023-11-17 11:22:41,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:22:41,891 INFO L124 PetriNetUnfolderBase]: 1553/2203 cut-off events. [2023-11-17 11:22:41,891 INFO L125 PetriNetUnfolderBase]: For 205/205 co-relation queries the response was YES. [2023-11-17 11:22:41,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4535 conditions, 2203 events. 1553/2203 cut-off events. For 205/205 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 8721 event pairs, 415 based on Foata normal form. 0/1717 useless extension candidates. Maximal degree in co-relation 1154. Up to 1796 conditions per place. [2023-11-17 11:22:41,909 INFO L140 encePairwiseOnDemand]: 78/90 looper letters, 36 selfloop transitions, 4 changer transitions 0/41 dead transitions. [2023-11-17 11:22:41,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 41 transitions, 192 flow [2023-11-17 11:22:41,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:22:41,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:22:41,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 74 transitions. [2023-11-17 11:22:41,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2740740740740741 [2023-11-17 11:22:41,913 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 74 transitions. [2023-11-17 11:22:41,913 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 74 transitions. [2023-11-17 11:22:41,913 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:22:41,913 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 74 transitions. [2023-11-17 11:22:41,915 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:41,918 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 90.0) internal successors, (360), 4 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:41,919 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 90.0) internal successors, (360), 4 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:41,921 INFO L175 Difference]: Start difference. First operand has 30 places, 30 transitions, 78 flow. Second operand 3 states and 74 transitions. [2023-11-17 11:22:41,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 41 transitions, 192 flow [2023-11-17 11:22:41,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 41 transitions, 188 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-11-17 11:22:41,929 INFO L231 Difference]: Finished difference. Result has 32 places, 28 transitions, 96 flow [2023-11-17 11:22:41,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=96, PETRI_PLACES=32, PETRI_TRANSITIONS=28} [2023-11-17 11:22:41,931 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 2 predicate places. [2023-11-17 11:22:41,932 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 28 transitions, 96 flow [2023-11-17 11:22:41,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:41,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:22:41,932 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:22:41,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 11:22:41,932 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 11:22:41,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:22:41,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1741263363, now seen corresponding path program 1 times [2023-11-17 11:22:41,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:22:41,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619417406] [2023-11-17 11:22:41,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:22:41,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:22:41,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:22:42,010 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 11:22:42,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:22:42,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619417406] [2023-11-17 11:22:42,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619417406] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:22:42,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:22:42,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:22:42,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3883822] [2023-11-17 11:22:42,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:22:42,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:22:42,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:22:42,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:22:42,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:22:42,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 90 [2023-11-17 11:22:42,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 28 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:42,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:22:42,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 90 [2023-11-17 11:22:42,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:22:42,171 INFO L124 PetriNetUnfolderBase]: 1166/1648 cut-off events. [2023-11-17 11:22:42,172 INFO L125 PetriNetUnfolderBase]: For 358/358 co-relation queries the response was YES. [2023-11-17 11:22:42,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3741 conditions, 1648 events. 1166/1648 cut-off events. For 358/358 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 5823 event pairs, 836 based on Foata normal form. 156/1804 useless extension candidates. Maximal degree in co-relation 2211. Up to 1633 conditions per place. [2023-11-17 11:22:42,186 INFO L140 encePairwiseOnDemand]: 86/90 looper letters, 23 selfloop transitions, 1 changer transitions 0/25 dead transitions. [2023-11-17 11:22:42,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 25 transitions, 132 flow [2023-11-17 11:22:42,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:22:42,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:22:42,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 45 transitions. [2023-11-17 11:22:42,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.16666666666666666 [2023-11-17 11:22:42,188 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 45 transitions. [2023-11-17 11:22:42,188 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 45 transitions. [2023-11-17 11:22:42,188 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:22:42,188 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 45 transitions. [2023-11-17 11:22:42,188 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:42,189 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 90.0) internal successors, (360), 4 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:42,189 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 90.0) internal successors, (360), 4 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:42,190 INFO L175 Difference]: Start difference. First operand has 32 places, 28 transitions, 96 flow. Second operand 3 states and 45 transitions. [2023-11-17 11:22:42,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 25 transitions, 132 flow [2023-11-17 11:22:42,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 25 transitions, 128 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 11:22:42,192 INFO L231 Difference]: Finished difference. Result has 30 places, 25 transitions, 82 flow [2023-11-17 11:22:42,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=30, PETRI_TRANSITIONS=25} [2023-11-17 11:22:42,193 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 0 predicate places. [2023-11-17 11:22:42,193 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 25 transitions, 82 flow [2023-11-17 11:22:42,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:42,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:22:42,193 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2023-11-17 11:22:42,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-17 11:22:42,193 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 11:22:42,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:22:42,194 INFO L85 PathProgramCache]: Analyzing trace with hash 380889490, now seen corresponding path program 1 times [2023-11-17 11:22:42,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:22:42,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346399770] [2023-11-17 11:22:42,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:22:42,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:22:42,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:22:42,205 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:22:42,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:22:42,215 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:22:42,215 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:22:42,215 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-17 11:22:42,216 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-17 11:22:42,216 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-17 11:22:42,216 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-17 11:22:42,216 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-17 11:22:42,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-17 11:22:42,217 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-17 11:22:42,217 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:22:42,217 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-17 11:22:42,240 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:22:42,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 62 places, 65 transitions, 158 flow [2023-11-17 11:22:42,264 INFO L124 PetriNetUnfolderBase]: 12/76 cut-off events. [2023-11-17 11:22:42,265 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-17 11:22:42,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95 conditions, 76 events. 12/76 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 187 event pairs, 0 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 70. Up to 5 conditions per place. [2023-11-17 11:22:42,265 INFO L82 GeneralOperation]: Start removeDead. Operand has 62 places, 65 transitions, 158 flow [2023-11-17 11:22:42,266 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 62 places, 65 transitions, 158 flow [2023-11-17 11:22:42,266 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:22:42,267 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 62 places, 65 transitions, 158 flow [2023-11-17 11:22:42,267 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 62 places, 65 transitions, 158 flow [2023-11-17 11:22:42,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 62 places, 65 transitions, 158 flow [2023-11-17 11:22:42,273 INFO L124 PetriNetUnfolderBase]: 12/76 cut-off events. [2023-11-17 11:22:42,274 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-17 11:22:42,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95 conditions, 76 events. 12/76 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 187 event pairs, 0 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 70. Up to 5 conditions per place. [2023-11-17 11:22:42,276 INFO L119 LiptonReduction]: Number of co-enabled transitions 2968 [2023-11-17 11:22:43,662 INFO L134 LiptonReduction]: Checked pairs total: 6570 [2023-11-17 11:22:43,663 INFO L136 LiptonReduction]: Total number of compositions: 55 [2023-11-17 11:22:43,665 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:22:43,665 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@634a95b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:22:43,666 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-17 11:22:43,667 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:22:43,668 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2023-11-17 11:22:43,668 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:22:43,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:22:43,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 11:22:43,668 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 11:22:43,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:22:43,669 INFO L85 PathProgramCache]: Analyzing trace with hash 14590683, now seen corresponding path program 1 times [2023-11-17 11:22:43,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:22:43,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315462479] [2023-11-17 11:22:43,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:22:43,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:22:43,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:22:43,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:22:43,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:22:43,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315462479] [2023-11-17 11:22:43,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315462479] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:22:43,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:22:43,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 11:22:43,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069493697] [2023-11-17 11:22:43,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:22:43,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:22:43,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:22:43,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:22:43,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:22:43,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 120 [2023-11-17 11:22:43,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 40 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:43,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:22:43,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 120 [2023-11-17 11:22:43,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:22:45,207 INFO L124 PetriNetUnfolderBase]: 13619/17650 cut-off events. [2023-11-17 11:22:45,207 INFO L125 PetriNetUnfolderBase]: For 2094/2094 co-relation queries the response was YES. [2023-11-17 11:22:45,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36307 conditions, 17650 events. 13619/17650 cut-off events. For 2094/2094 co-relation queries the response was YES. Maximal size of possible extension queue 577. Compared 78219 event pairs, 3661 based on Foata normal form. 0/13192 useless extension candidates. Maximal degree in co-relation 4565. Up to 16064 conditions per place. [2023-11-17 11:22:45,361 INFO L140 encePairwiseOnDemand]: 103/120 looper letters, 47 selfloop transitions, 5 changer transitions 0/53 dead transitions. [2023-11-17 11:22:45,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 53 transitions, 259 flow [2023-11-17 11:22:45,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:22:45,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:22:45,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 99 transitions. [2023-11-17 11:22:45,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.275 [2023-11-17 11:22:45,366 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 99 transitions. [2023-11-17 11:22:45,366 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 99 transitions. [2023-11-17 11:22:45,366 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:22:45,366 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 99 transitions. [2023-11-17 11:22:45,368 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:45,369 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 120.0) internal successors, (480), 4 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:45,369 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 120.0) internal successors, (480), 4 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:45,369 INFO L175 Difference]: Start difference. First operand has 38 places, 40 transitions, 108 flow. Second operand 3 states and 99 transitions. [2023-11-17 11:22:45,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 53 transitions, 259 flow [2023-11-17 11:22:45,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 53 transitions, 247 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-11-17 11:22:45,374 INFO L231 Difference]: Finished difference. Result has 40 places, 36 transitions, 125 flow [2023-11-17 11:22:45,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=125, PETRI_PLACES=40, PETRI_TRANSITIONS=36} [2023-11-17 11:22:45,376 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 2 predicate places. [2023-11-17 11:22:45,376 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 36 transitions, 125 flow [2023-11-17 11:22:45,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:45,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:22:45,376 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:22:45,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-17 11:22:45,377 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 11:22:45,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:22:45,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1363579509, now seen corresponding path program 1 times [2023-11-17 11:22:45,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:22:45,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740218869] [2023-11-17 11:22:45,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:22:45,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:22:45,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:22:45,423 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 11:22:45,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:22:45,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740218869] [2023-11-17 11:22:45,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740218869] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:22:45,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:22:45,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:22:45,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763247636] [2023-11-17 11:22:45,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:22:45,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:22:45,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:22:45,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:22:45,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:22:45,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 120 [2023-11-17 11:22:45,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 36 transitions, 125 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:45,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:22:45,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 120 [2023-11-17 11:22:45,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:22:46,403 INFO L124 PetriNetUnfolderBase]: 8166/10571 cut-off events. [2023-11-17 11:22:46,404 INFO L125 PetriNetUnfolderBase]: For 2686/2686 co-relation queries the response was YES. [2023-11-17 11:22:46,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23739 conditions, 10571 events. 8166/10571 cut-off events. For 2686/2686 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 41672 event pairs, 5844 based on Foata normal form. 1332/11903 useless extension candidates. Maximal degree in co-relation 14298. Up to 10508 conditions per place. [2023-11-17 11:22:46,464 INFO L140 encePairwiseOnDemand]: 115/120 looper letters, 30 selfloop transitions, 1 changer transitions 0/32 dead transitions. [2023-11-17 11:22:46,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 32 transitions, 171 flow [2023-11-17 11:22:46,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:22:46,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:22:46,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 58 transitions. [2023-11-17 11:22:46,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.16111111111111112 [2023-11-17 11:22:46,465 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 58 transitions. [2023-11-17 11:22:46,465 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 58 transitions. [2023-11-17 11:22:46,466 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:22:46,466 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 58 transitions. [2023-11-17 11:22:46,466 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:46,467 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 120.0) internal successors, (480), 4 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:46,468 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 120.0) internal successors, (480), 4 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:46,468 INFO L175 Difference]: Start difference. First operand has 40 places, 36 transitions, 125 flow. Second operand 3 states and 58 transitions. [2023-11-17 11:22:46,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 32 transitions, 171 flow [2023-11-17 11:22:46,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 32 transitions, 166 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 11:22:46,473 INFO L231 Difference]: Finished difference. Result has 37 places, 32 transitions, 106 flow [2023-11-17 11:22:46,473 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=37, PETRI_TRANSITIONS=32} [2023-11-17 11:22:46,475 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -1 predicate places. [2023-11-17 11:22:46,475 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 32 transitions, 106 flow [2023-11-17 11:22:46,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:46,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:22:46,476 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1] [2023-11-17 11:22:46,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-17 11:22:46,476 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 11:22:46,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:22:46,476 INFO L85 PathProgramCache]: Analyzing trace with hash -739555657, now seen corresponding path program 1 times [2023-11-17 11:22:46,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:22:46,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738631468] [2023-11-17 11:22:46,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:22:46,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:22:46,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:22:46,493 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:22:46,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:22:46,521 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:22:46,521 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:22:46,521 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-11-17 11:22:46,521 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-11-17 11:22:46,521 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-11-17 11:22:46,522 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-11-17 11:22:46,522 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-11-17 11:22:46,522 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-11-17 11:22:46,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-17 11:22:46,522 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-17 11:22:46,523 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:22:46,523 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-11-17 11:22:46,552 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:22:46,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 76 places, 80 transitions, 200 flow [2023-11-17 11:22:46,561 INFO L124 PetriNetUnfolderBase]: 15/94 cut-off events. [2023-11-17 11:22:46,561 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-17 11:22:46,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120 conditions, 94 events. 15/94 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 244 event pairs, 0 based on Foata normal form. 0/68 useless extension candidates. Maximal degree in co-relation 94. Up to 6 conditions per place. [2023-11-17 11:22:46,562 INFO L82 GeneralOperation]: Start removeDead. Operand has 76 places, 80 transitions, 200 flow [2023-11-17 11:22:46,563 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 76 places, 80 transitions, 200 flow [2023-11-17 11:22:46,563 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:22:46,563 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 76 places, 80 transitions, 200 flow [2023-11-17 11:22:46,563 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 76 places, 80 transitions, 200 flow [2023-11-17 11:22:46,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 76 places, 80 transitions, 200 flow [2023-11-17 11:22:46,571 INFO L124 PetriNetUnfolderBase]: 15/94 cut-off events. [2023-11-17 11:22:46,571 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-17 11:22:46,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120 conditions, 94 events. 15/94 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 244 event pairs, 0 based on Foata normal form. 0/68 useless extension candidates. Maximal degree in co-relation 94. Up to 6 conditions per place. [2023-11-17 11:22:46,574 INFO L119 LiptonReduction]: Number of co-enabled transitions 4760 [2023-11-17 11:22:48,402 INFO L134 LiptonReduction]: Checked pairs total: 10163 [2023-11-17 11:22:48,403 INFO L136 LiptonReduction]: Total number of compositions: 68 [2023-11-17 11:22:48,405 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:22:48,405 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@634a95b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:22:48,405 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-17 11:22:48,407 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:22:48,407 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2023-11-17 11:22:48,407 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:22:48,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:22:48,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 11:22:48,407 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-17 11:22:48,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:22:48,408 INFO L85 PathProgramCache]: Analyzing trace with hash 18746961, now seen corresponding path program 1 times [2023-11-17 11:22:48,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:22:48,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334127968] [2023-11-17 11:22:48,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:22:48,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:22:48,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:22:48,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:22:48,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:22:48,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334127968] [2023-11-17 11:22:48,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334127968] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:22:48,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:22:48,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 11:22:48,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397619116] [2023-11-17 11:22:48,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:22:48,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:22:48,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:22:48,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:22:48,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:22:48,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 148 [2023-11-17 11:22:48,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 48 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:48,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:22:48,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 148 [2023-11-17 11:22:48,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:22:57,221 INFO L124 PetriNetUnfolderBase]: 110045/135115 cut-off events. [2023-11-17 11:22:57,221 INFO L125 PetriNetUnfolderBase]: For 19422/19422 co-relation queries the response was YES. [2023-11-17 11:22:57,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 277910 conditions, 135115 events. 110045/135115 cut-off events. For 19422/19422 co-relation queries the response was YES. Maximal size of possible extension queue 3208. Compared 640781 event pairs, 31240 based on Foata normal form. 0/98242 useless extension candidates. Maximal degree in co-relation 36515. Up to 129263 conditions per place. [2023-11-17 11:22:58,091 INFO L140 encePairwiseOnDemand]: 128/148 looper letters, 58 selfloop transitions, 6 changer transitions 0/65 dead transitions. [2023-11-17 11:22:58,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 65 transitions, 330 flow [2023-11-17 11:22:58,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:22:58,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:22:58,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 120 transitions. [2023-11-17 11:22:58,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2702702702702703 [2023-11-17 11:22:58,094 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 120 transitions. [2023-11-17 11:22:58,094 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 120 transitions. [2023-11-17 11:22:58,094 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:22:58,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 120 transitions. [2023-11-17 11:22:58,095 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:58,097 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 148.0) internal successors, (592), 4 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:58,098 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 148.0) internal successors, (592), 4 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:58,098 INFO L175 Difference]: Start difference. First operand has 46 places, 48 transitions, 136 flow. Second operand 3 states and 120 transitions. [2023-11-17 11:22:58,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 65 transitions, 330 flow [2023-11-17 11:22:58,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 65 transitions, 306 flow, removed 12 selfloop flow, removed 0 redundant places. [2023-11-17 11:22:58,107 INFO L231 Difference]: Finished difference. Result has 48 places, 44 transitions, 154 flow [2023-11-17 11:22:58,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=154, PETRI_PLACES=48, PETRI_TRANSITIONS=44} [2023-11-17 11:22:58,109 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 2 predicate places. [2023-11-17 11:22:58,109 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 44 transitions, 154 flow [2023-11-17 11:22:58,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:58,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:22:58,110 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:22:58,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-17 11:22:58,110 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-17 11:22:58,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:22:58,111 INFO L85 PathProgramCache]: Analyzing trace with hash -1626177568, now seen corresponding path program 1 times [2023-11-17 11:22:58,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:22:58,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914598166] [2023-11-17 11:22:58,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:22:58,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:22:58,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:22:58,177 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 11:22:58,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:22:58,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914598166] [2023-11-17 11:22:58,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914598166] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:22:58,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:22:58,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:22:58,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468149054] [2023-11-17 11:22:58,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:22:58,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:22:58,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:22:58,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:22:58,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:22:58,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 148 [2023-11-17 11:22:58,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 44 transitions, 154 flow. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:58,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:22:58,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 148 [2023-11-17 11:22:58,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:23:02,592 INFO L124 PetriNetUnfolderBase]: 52541/64537 cut-off events. [2023-11-17 11:23:02,593 INFO L125 PetriNetUnfolderBase]: For 17890/17890 co-relation queries the response was YES. [2023-11-17 11:23:02,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143921 conditions, 64537 events. 52541/64537 cut-off events. For 17890/17890 co-relation queries the response was YES. Maximal size of possible extension queue 1295. Compared 272450 event pairs, 37736 based on Foata normal form. 9492/74029 useless extension candidates. Maximal degree in co-relation 86865. Up to 64258 conditions per place. [2023-11-17 11:23:02,979 INFO L140 encePairwiseOnDemand]: 142/148 looper letters, 37 selfloop transitions, 1 changer transitions 0/39 dead transitions. [2023-11-17 11:23:02,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 39 transitions, 210 flow [2023-11-17 11:23:02,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:23:02,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:23:02,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 71 transitions. [2023-11-17 11:23:02,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.15990990990990991 [2023-11-17 11:23:02,981 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 71 transitions. [2023-11-17 11:23:02,981 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 71 transitions. [2023-11-17 11:23:02,981 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:23:02,982 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 71 transitions. [2023-11-17 11:23:02,982 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:02,983 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 148.0) internal successors, (592), 4 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:02,984 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 148.0) internal successors, (592), 4 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:02,984 INFO L175 Difference]: Start difference. First operand has 48 places, 44 transitions, 154 flow. Second operand 3 states and 71 transitions. [2023-11-17 11:23:02,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 39 transitions, 210 flow [2023-11-17 11:23:02,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 39 transitions, 204 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 11:23:02,995 INFO L231 Difference]: Finished difference. Result has 44 places, 39 transitions, 130 flow [2023-11-17 11:23:02,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=44, PETRI_TRANSITIONS=39} [2023-11-17 11:23:02,997 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, -2 predicate places. [2023-11-17 11:23:02,997 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 39 transitions, 130 flow [2023-11-17 11:23:02,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:02,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:23:02,998 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:23:02,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-17 11:23:02,998 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-17 11:23:02,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:23:02,999 INFO L85 PathProgramCache]: Analyzing trace with hash 2141714609, now seen corresponding path program 1 times [2023-11-17 11:23:02,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:23:02,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846898018] [2023-11-17 11:23:02,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:23:02,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:23:03,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:23:03,019 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:23:03,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:23:03,033 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:23:03,034 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:23:03,034 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-11-17 11:23:03,034 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2023-11-17 11:23:03,034 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2023-11-17 11:23:03,035 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2023-11-17 11:23:03,035 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2023-11-17 11:23:03,035 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2023-11-17 11:23:03,035 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2023-11-17 11:23:03,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-17 11:23:03,035 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-17 11:23:03,036 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:23:03,036 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-11-17 11:23:03,069 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:23:03,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 90 places, 95 transitions, 244 flow [2023-11-17 11:23:03,081 INFO L124 PetriNetUnfolderBase]: 18/112 cut-off events. [2023-11-17 11:23:03,082 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2023-11-17 11:23:03,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146 conditions, 112 events. 18/112 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 305 event pairs, 0 based on Foata normal form. 0/81 useless extension candidates. Maximal degree in co-relation 119. Up to 7 conditions per place. [2023-11-17 11:23:03,083 INFO L82 GeneralOperation]: Start removeDead. Operand has 90 places, 95 transitions, 244 flow [2023-11-17 11:23:03,084 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 90 places, 95 transitions, 244 flow [2023-11-17 11:23:03,084 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:23:03,084 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 90 places, 95 transitions, 244 flow [2023-11-17 11:23:03,084 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 90 places, 95 transitions, 244 flow [2023-11-17 11:23:03,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 90 places, 95 transitions, 244 flow [2023-11-17 11:23:03,093 INFO L124 PetriNetUnfolderBase]: 18/112 cut-off events. [2023-11-17 11:23:03,093 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2023-11-17 11:23:03,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146 conditions, 112 events. 18/112 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 305 event pairs, 0 based on Foata normal form. 0/81 useless extension candidates. Maximal degree in co-relation 119. Up to 7 conditions per place. [2023-11-17 11:23:03,097 INFO L119 LiptonReduction]: Number of co-enabled transitions 6972 [2023-11-17 11:23:05,527 INFO L134 LiptonReduction]: Checked pairs total: 15259 [2023-11-17 11:23:05,527 INFO L136 LiptonReduction]: Total number of compositions: 82 [2023-11-17 11:23:05,529 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:23:05,530 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@634a95b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:23:05,530 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-11-17 11:23:05,531 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:23:05,531 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2023-11-17 11:23:05,531 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:23:05,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:23:05,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 11:23:05,531 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2023-11-17 11:23:05,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:23:05,532 INFO L85 PathProgramCache]: Analyzing trace with hash 23765194, now seen corresponding path program 1 times [2023-11-17 11:23:05,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:23:05,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7253931] [2023-11-17 11:23:05,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:23:05,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:23:05,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:23:05,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:23:05,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:23:05,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7253931] [2023-11-17 11:23:05,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7253931] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:23:05,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:23:05,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 11:23:05,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325053488] [2023-11-17 11:23:05,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:23:05,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:23:05,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:23:05,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:23:05,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:23:05,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 177 [2023-11-17 11:23:05,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 57 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:05,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:23:05,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 177 [2023-11-17 11:23:05,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand