/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/parallel-bakery-2.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 14:16:30,801 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 14:16:30,862 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-24 14:16:30,866 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 14:16:30,866 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 14:16:30,888 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 14:16:30,888 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 14:16:30,889 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 14:16:30,889 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 14:16:30,890 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 14:16:30,890 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 14:16:30,890 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 14:16:30,891 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 14:16:30,891 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 14:16:30,891 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 14:16:30,892 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 14:16:30,892 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 14:16:30,892 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 14:16:30,893 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 14:16:30,893 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 14:16:30,893 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 14:16:30,899 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 14:16:30,899 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 14:16:30,900 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 14:16:30,903 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 14:16:30,903 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 14:16:30,903 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 14:16:30,904 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 14:16:30,904 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 14:16:30,904 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 14:16:30,905 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 14:16:30,905 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 14:16:30,905 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 14:16:30,905 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 14:16:30,906 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 14:16:30,906 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-24 14:16:31,197 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 14:16:31,218 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 14:16:31,220 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 14:16:31,221 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 14:16:31,223 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 14:16:31,224 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-bakery-2.wvr.c [2023-08-24 14:16:32,471 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 14:16:32,676 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 14:16:32,677 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-bakery-2.wvr.c [2023-08-24 14:16:32,683 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d8550b54f/0441417aae5a43d5b371cbc4cca45370/FLAG7cb82d404 [2023-08-24 14:16:32,696 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d8550b54f/0441417aae5a43d5b371cbc4cca45370 [2023-08-24 14:16:32,700 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 14:16:32,703 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 14:16:32,708 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 14:16:32,709 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 14:16:32,711 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 14:16:32,712 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 02:16:32" (1/1) ... [2023-08-24 14:16:32,713 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10f4d1fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:16:32, skipping insertion in model container [2023-08-24 14:16:32,714 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 02:16:32" (1/1) ... [2023-08-24 14:16:32,741 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 14:16:32,913 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-bakery-2.wvr.c[3512,3525] [2023-08-24 14:16:32,918 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 14:16:32,927 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 14:16:32,960 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-bakery-2.wvr.c[3512,3525] [2023-08-24 14:16:32,960 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 14:16:32,969 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 14:16:32,971 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 14:16:32,977 INFO L206 MainTranslator]: Completed translation [2023-08-24 14:16:32,979 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:16:32 WrapperNode [2023-08-24 14:16:32,979 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 14:16:32,980 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 14:16:32,980 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 14:16:32,980 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 14:16:32,986 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:16:32" (1/1) ... [2023-08-24 14:16:32,999 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:16:32" (1/1) ... [2023-08-24 14:16:33,029 INFO L138 Inliner]: procedures = 21, calls = 60, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 155 [2023-08-24 14:16:33,029 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 14:16:33,030 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 14:16:33,030 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 14:16:33,031 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 14:16:33,038 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:16:32" (1/1) ... [2023-08-24 14:16:33,038 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:16:32" (1/1) ... [2023-08-24 14:16:33,049 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:16:32" (1/1) ... [2023-08-24 14:16:33,050 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:16:32" (1/1) ... [2023-08-24 14:16:33,058 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:16:32" (1/1) ... [2023-08-24 14:16:33,060 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:16:32" (1/1) ... [2023-08-24 14:16:33,061 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:16:32" (1/1) ... [2023-08-24 14:16:33,062 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:16:32" (1/1) ... [2023-08-24 14:16:33,064 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 14:16:33,064 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 14:16:33,064 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 14:16:33,065 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 14:16:33,065 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:16:32" (1/1) ... [2023-08-24 14:16:33,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 14:16:33,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 14:16:33,103 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-24 14:16:33,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-24 14:16:33,141 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 14:16:33,142 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-24 14:16:33,142 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-24 14:16:33,143 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-24 14:16:33,143 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-24 14:16:33,143 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 14:16:33,143 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 14:16:33,143 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 14:16:33,143 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-24 14:16:33,144 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-24 14:16:33,144 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 14:16:33,144 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 14:16:33,144 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 14:16:33,144 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 14:16:33,145 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-24 14:16:33,255 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 14:16:33,257 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 14:16:33,491 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 14:16:33,546 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 14:16:33,546 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-08-24 14:16:33,548 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 02:16:33 BoogieIcfgContainer [2023-08-24 14:16:33,552 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 14:16:33,556 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 14:16:33,556 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 14:16:33,559 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 14:16:33,559 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 02:16:32" (1/3) ... [2023-08-24 14:16:33,560 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b46af32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 02:16:33, skipping insertion in model container [2023-08-24 14:16:33,560 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:16:32" (2/3) ... [2023-08-24 14:16:33,560 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b46af32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 02:16:33, skipping insertion in model container [2023-08-24 14:16:33,560 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 02:16:33" (3/3) ... [2023-08-24 14:16:33,561 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-bakery-2.wvr.c [2023-08-24 14:16:33,573 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 14:16:33,574 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 14:16:33,574 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 14:16:33,637 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-24 14:16:33,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 113 places, 108 transitions, 232 flow [2023-08-24 14:16:33,719 INFO L124 PetriNetUnfolderBase]: 2/106 cut-off events. [2023-08-24 14:16:33,719 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 14:16:33,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115 conditions, 106 events. 2/106 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 44 event pairs, 0 based on Foata normal form. 0/103 useless extension candidates. Maximal degree in co-relation 72. Up to 2 conditions per place. [2023-08-24 14:16:33,723 INFO L82 GeneralOperation]: Start removeDead. Operand has 113 places, 108 transitions, 232 flow [2023-08-24 14:16:33,727 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 103 places, 98 transitions, 208 flow [2023-08-24 14:16:33,730 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 14:16:33,737 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 103 places, 98 transitions, 208 flow [2023-08-24 14:16:33,740 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 103 places, 98 transitions, 208 flow [2023-08-24 14:16:33,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 103 places, 98 transitions, 208 flow [2023-08-24 14:16:33,767 INFO L124 PetriNetUnfolderBase]: 2/98 cut-off events. [2023-08-24 14:16:33,767 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 14:16:33,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107 conditions, 98 events. 2/98 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 43 event pairs, 0 based on Foata normal form. 0/96 useless extension candidates. Maximal degree in co-relation 72. Up to 2 conditions per place. [2023-08-24 14:16:33,769 INFO L119 LiptonReduction]: Number of co-enabled transitions 572 [2023-08-24 14:16:36,419 INFO L134 LiptonReduction]: Checked pairs total: 4021 [2023-08-24 14:16:36,419 INFO L136 LiptonReduction]: Total number of compositions: 78 [2023-08-24 14:16:36,431 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 14:16:36,436 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@350efe46, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 14:16:36,437 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-24 14:16:36,443 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 14:16:36,443 INFO L124 PetriNetUnfolderBase]: 0/26 cut-off events. [2023-08-24 14:16:36,443 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 14:16:36,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:16:36,444 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:16:36,444 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 14:16:36,448 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:16:36,449 INFO L85 PathProgramCache]: Analyzing trace with hash -64474640, now seen corresponding path program 1 times [2023-08-24 14:16:36,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:16:36,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924397056] [2023-08-24 14:16:36,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:16:36,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:16:36,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:16:37,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:16:37,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:16:37,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924397056] [2023-08-24 14:16:37,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924397056] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 14:16:37,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 14:16:37,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 14:16:37,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102974996] [2023-08-24 14:16:37,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 14:16:37,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 14:16:37,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:16:37,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 14:16:37,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-08-24 14:16:37,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 186 [2023-08-24 14:16:37,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 27 transitions, 66 flow. Second operand has 7 states, 7 states have (on average 86.0) internal successors, (602), 7 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:16:37,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:16:37,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 186 [2023-08-24 14:16:37,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:16:37,445 INFO L124 PetriNetUnfolderBase]: 172/364 cut-off events. [2023-08-24 14:16:37,446 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2023-08-24 14:16:37,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 754 conditions, 364 events. 172/364 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1509 event pairs, 57 based on Foata normal form. 1/355 useless extension candidates. Maximal degree in co-relation 616. Up to 98 conditions per place. [2023-08-24 14:16:37,452 INFO L140 encePairwiseOnDemand]: 180/186 looper letters, 44 selfloop transitions, 7 changer transitions 17/74 dead transitions. [2023-08-24 14:16:37,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 74 transitions, 323 flow [2023-08-24 14:16:37,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 14:16:37,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 14:16:37,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 733 transitions. [2023-08-24 14:16:37,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49260752688172044 [2023-08-24 14:16:37,474 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 733 transitions. [2023-08-24 14:16:37,474 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 733 transitions. [2023-08-24 14:16:37,477 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:16:37,479 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 733 transitions. [2023-08-24 14:16:37,483 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 91.625) internal successors, (733), 8 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:16:37,489 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 186.0) internal successors, (1674), 9 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:16:37,491 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 186.0) internal successors, (1674), 9 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:16:37,492 INFO L175 Difference]: Start difference. First operand has 34 places, 27 transitions, 66 flow. Second operand 8 states and 733 transitions. [2023-08-24 14:16:37,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 74 transitions, 323 flow [2023-08-24 14:16:37,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 74 transitions, 297 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-24 14:16:37,502 INFO L231 Difference]: Finished difference. Result has 40 places, 32 transitions, 96 flow [2023-08-24 14:16:37,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=96, PETRI_PLACES=40, PETRI_TRANSITIONS=32} [2023-08-24 14:16:37,508 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 6 predicate places. [2023-08-24 14:16:37,508 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 32 transitions, 96 flow [2023-08-24 14:16:37,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 86.0) internal successors, (602), 7 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:16:37,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:16:37,510 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:16:37,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 14:16:37,510 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 14:16:37,511 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:16:37,512 INFO L85 PathProgramCache]: Analyzing trace with hash -449195868, now seen corresponding path program 2 times [2023-08-24 14:16:37,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:16:37,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139224454] [2023-08-24 14:16:37,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:16:37,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:16:37,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:16:37,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:16:37,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:16:37,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139224454] [2023-08-24 14:16:37,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139224454] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 14:16:37,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 14:16:37,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 14:16:37,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34787828] [2023-08-24 14:16:37,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 14:16:37,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-24 14:16:37,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:16:37,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-24 14:16:37,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-24 14:16:37,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 186 [2023-08-24 14:16:37,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 32 transitions, 96 flow. Second operand has 6 states, 6 states have (on average 89.16666666666667) internal successors, (535), 6 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:16:37,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:16:37,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 186 [2023-08-24 14:16:37,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:16:38,004 INFO L124 PetriNetUnfolderBase]: 141/363 cut-off events. [2023-08-24 14:16:38,004 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-24 14:16:38,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 732 conditions, 363 events. 141/363 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1758 event pairs, 60 based on Foata normal form. 6/365 useless extension candidates. Maximal degree in co-relation 717. Up to 151 conditions per place. [2023-08-24 14:16:38,011 INFO L140 encePairwiseOnDemand]: 180/186 looper letters, 21 selfloop transitions, 3 changer transitions 13/50 dead transitions. [2023-08-24 14:16:38,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 50 transitions, 207 flow [2023-08-24 14:16:38,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 14:16:38,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 14:16:38,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 554 transitions. [2023-08-24 14:16:38,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.496415770609319 [2023-08-24 14:16:38,014 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 554 transitions. [2023-08-24 14:16:38,015 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 554 transitions. [2023-08-24 14:16:38,015 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:16:38,015 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 554 transitions. [2023-08-24 14:16:38,016 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 92.33333333333333) internal successors, (554), 6 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:16:38,019 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 186.0) internal successors, (1302), 7 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:16:38,019 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 186.0) internal successors, (1302), 7 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:16:38,019 INFO L175 Difference]: Start difference. First operand has 40 places, 32 transitions, 96 flow. Second operand 6 states and 554 transitions. [2023-08-24 14:16:38,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 50 transitions, 207 flow [2023-08-24 14:16:38,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 50 transitions, 205 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-24 14:16:38,024 INFO L231 Difference]: Finished difference. Result has 45 places, 32 transitions, 108 flow [2023-08-24 14:16:38,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=108, PETRI_PLACES=45, PETRI_TRANSITIONS=32} [2023-08-24 14:16:38,025 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 11 predicate places. [2023-08-24 14:16:38,025 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 32 transitions, 108 flow [2023-08-24 14:16:38,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 89.16666666666667) internal successors, (535), 6 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:16:38,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:16:38,027 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:16:38,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-24 14:16:38,029 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 14:16:38,034 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:16:38,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1863724180, now seen corresponding path program 3 times [2023-08-24 14:16:38,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:16:38,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323155823] [2023-08-24 14:16:38,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:16:38,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:16:38,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:16:38,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:16:38,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:16:38,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323155823] [2023-08-24 14:16:38,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323155823] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 14:16:38,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 14:16:38,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-24 14:16:38,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554268819] [2023-08-24 14:16:38,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 14:16:38,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 14:16:38,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:16:38,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 14:16:38,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 14:16:38,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 186 [2023-08-24 14:16:38,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 32 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:16:38,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:16:38,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 186 [2023-08-24 14:16:38,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:16:38,208 INFO L124 PetriNetUnfolderBase]: 119/314 cut-off events. [2023-08-24 14:16:38,208 INFO L125 PetriNetUnfolderBase]: For 96/99 co-relation queries the response was YES. [2023-08-24 14:16:38,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 744 conditions, 314 events. 119/314 cut-off events. For 96/99 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1352 event pairs, 80 based on Foata normal form. 5/306 useless extension candidates. Maximal degree in co-relation 381. Up to 200 conditions per place. [2023-08-24 14:16:38,210 INFO L140 encePairwiseOnDemand]: 183/186 looper letters, 23 selfloop transitions, 2 changer transitions 0/38 dead transitions. [2023-08-24 14:16:38,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 38 transitions, 175 flow [2023-08-24 14:16:38,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 14:16:38,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 14:16:38,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 296 transitions. [2023-08-24 14:16:38,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5304659498207885 [2023-08-24 14:16:38,212 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 296 transitions. [2023-08-24 14:16:38,212 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 296 transitions. [2023-08-24 14:16:38,212 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:16:38,212 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 296 transitions. [2023-08-24 14:16:38,213 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:16:38,214 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 186.0) internal successors, (744), 4 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:16:38,215 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 186.0) internal successors, (744), 4 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:16:38,215 INFO L175 Difference]: Start difference. First operand has 45 places, 32 transitions, 108 flow. Second operand 3 states and 296 transitions. [2023-08-24 14:16:38,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 38 transitions, 175 flow [2023-08-24 14:16:38,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 38 transitions, 161 flow, removed 4 selfloop flow, removed 5 redundant places. [2023-08-24 14:16:38,218 INFO L231 Difference]: Finished difference. Result has 41 places, 32 transitions, 106 flow [2023-08-24 14:16:38,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=41, PETRI_TRANSITIONS=32} [2023-08-24 14:16:38,220 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 7 predicate places. [2023-08-24 14:16:38,222 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 32 transitions, 106 flow [2023-08-24 14:16:38,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:16:38,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:16:38,223 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:16:38,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-24 14:16:38,223 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 14:16:38,224 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:16:38,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1854171154, now seen corresponding path program 4 times [2023-08-24 14:16:38,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:16:38,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539481941] [2023-08-24 14:16:38,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:16:38,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:16:38,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:16:38,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:16:38,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:16:38,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539481941] [2023-08-24 14:16:38,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539481941] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 14:16:38,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 14:16:38,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 14:16:38,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360356223] [2023-08-24 14:16:38,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 14:16:38,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-24 14:16:38,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:16:38,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-24 14:16:38,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-24 14:16:38,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 186 [2023-08-24 14:16:38,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 32 transitions, 106 flow. Second operand has 6 states, 6 states have (on average 89.16666666666667) internal successors, (535), 6 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:16:38,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:16:38,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 186 [2023-08-24 14:16:38,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:16:38,580 INFO L124 PetriNetUnfolderBase]: 129/345 cut-off events. [2023-08-24 14:16:38,580 INFO L125 PetriNetUnfolderBase]: For 46/47 co-relation queries the response was YES. [2023-08-24 14:16:38,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 780 conditions, 345 events. 129/345 cut-off events. For 46/47 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1559 event pairs, 21 based on Foata normal form. 7/350 useless extension candidates. Maximal degree in co-relation 385. Up to 86 conditions per place. [2023-08-24 14:16:38,582 INFO L140 encePairwiseOnDemand]: 180/186 looper letters, 27 selfloop transitions, 6 changer transitions 13/59 dead transitions. [2023-08-24 14:16:38,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 59 transitions, 265 flow [2023-08-24 14:16:38,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 14:16:38,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 14:16:38,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 563 transitions. [2023-08-24 14:16:38,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5044802867383512 [2023-08-24 14:16:38,585 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 563 transitions. [2023-08-24 14:16:38,585 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 563 transitions. [2023-08-24 14:16:38,585 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:16:38,585 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 563 transitions. [2023-08-24 14:16:38,587 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 93.83333333333333) internal successors, (563), 6 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:16:38,589 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 186.0) internal successors, (1302), 7 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:16:38,590 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 186.0) internal successors, (1302), 7 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:16:38,590 INFO L175 Difference]: Start difference. First operand has 41 places, 32 transitions, 106 flow. Second operand 6 states and 563 transitions. [2023-08-24 14:16:38,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 59 transitions, 265 flow [2023-08-24 14:16:38,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 59 transitions, 261 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-24 14:16:38,594 INFO L231 Difference]: Finished difference. Result has 48 places, 35 transitions, 141 flow [2023-08-24 14:16:38,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=141, PETRI_PLACES=48, PETRI_TRANSITIONS=35} [2023-08-24 14:16:38,595 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 14 predicate places. [2023-08-24 14:16:38,595 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 35 transitions, 141 flow [2023-08-24 14:16:38,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 89.16666666666667) internal successors, (535), 6 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:16:38,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:16:38,596 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:16:38,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-24 14:16:38,596 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 14:16:38,597 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:16:38,597 INFO L85 PathProgramCache]: Analyzing trace with hash 114949804, now seen corresponding path program 5 times [2023-08-24 14:16:38,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:16:38,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38427367] [2023-08-24 14:16:38,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:16:38,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:16:38,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:16:38,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:16:38,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:16:38,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38427367] [2023-08-24 14:16:38,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38427367] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 14:16:38,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 14:16:38,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-24 14:16:38,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575768542] [2023-08-24 14:16:38,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 14:16:38,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 14:16:38,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:16:38,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 14:16:38,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 14:16:38,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 186 [2023-08-24 14:16:38,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 35 transitions, 141 flow. Second operand has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:16:38,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:16:38,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 186 [2023-08-24 14:16:38,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:16:38,734 INFO L124 PetriNetUnfolderBase]: 73/218 cut-off events. [2023-08-24 14:16:38,735 INFO L125 PetriNetUnfolderBase]: For 154/163 co-relation queries the response was YES. [2023-08-24 14:16:38,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 616 conditions, 218 events. 73/218 cut-off events. For 154/163 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 875 event pairs, 58 based on Foata normal form. 3/215 useless extension candidates. Maximal degree in co-relation 554. Up to 158 conditions per place. [2023-08-24 14:16:38,736 INFO L140 encePairwiseOnDemand]: 183/186 looper letters, 22 selfloop transitions, 2 changer transitions 0/37 dead transitions. [2023-08-24 14:16:38,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 37 transitions, 198 flow [2023-08-24 14:16:38,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 14:16:38,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 14:16:38,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 292 transitions. [2023-08-24 14:16:38,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5232974910394266 [2023-08-24 14:16:38,738 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 292 transitions. [2023-08-24 14:16:38,738 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 292 transitions. [2023-08-24 14:16:38,738 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:16:38,738 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 292 transitions. [2023-08-24 14:16:38,740 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 97.33333333333333) internal successors, (292), 3 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:16:38,741 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 186.0) internal successors, (744), 4 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:16:38,742 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 186.0) internal successors, (744), 4 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:16:38,742 INFO L175 Difference]: Start difference. First operand has 48 places, 35 transitions, 141 flow. Second operand 3 states and 292 transitions. [2023-08-24 14:16:38,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 37 transitions, 198 flow [2023-08-24 14:16:38,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 37 transitions, 189 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-24 14:16:38,744 INFO L231 Difference]: Finished difference. Result has 48 places, 35 transitions, 140 flow [2023-08-24 14:16:38,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=140, PETRI_PLACES=48, PETRI_TRANSITIONS=35} [2023-08-24 14:16:38,746 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 14 predicate places. [2023-08-24 14:16:38,746 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 35 transitions, 140 flow [2023-08-24 14:16:38,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:16:38,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:16:38,747 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:16:38,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-24 14:16:38,747 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 14:16:38,747 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:16:38,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1059714804, now seen corresponding path program 6 times [2023-08-24 14:16:38,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:16:38,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177988471] [2023-08-24 14:16:38,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:16:38,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:16:38,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:16:38,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:16:38,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:16:38,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177988471] [2023-08-24 14:16:38,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177988471] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 14:16:38,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 14:16:38,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 14:16:38,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52768426] [2023-08-24 14:16:38,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 14:16:38,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 14:16:38,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:16:38,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 14:16:38,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-08-24 14:16:38,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 186 [2023-08-24 14:16:38,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 35 transitions, 140 flow. Second operand has 7 states, 7 states have (on average 86.0) internal successors, (602), 7 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:16:38,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:16:38,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 186 [2023-08-24 14:16:38,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:16:39,140 INFO L124 PetriNetUnfolderBase]: 126/275 cut-off events. [2023-08-24 14:16:39,140 INFO L125 PetriNetUnfolderBase]: For 157/157 co-relation queries the response was YES. [2023-08-24 14:16:39,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 793 conditions, 275 events. 126/275 cut-off events. For 157/157 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1008 event pairs, 33 based on Foata normal form. 1/270 useless extension candidates. Maximal degree in co-relation 753. Up to 72 conditions per place. [2023-08-24 14:16:39,142 INFO L140 encePairwiseOnDemand]: 180/186 looper letters, 34 selfloop transitions, 6 changer transitions 24/70 dead transitions. [2023-08-24 14:16:39,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 70 transitions, 400 flow [2023-08-24 14:16:39,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 14:16:39,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 14:16:39,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 721 transitions. [2023-08-24 14:16:39,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4845430107526882 [2023-08-24 14:16:39,144 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 721 transitions. [2023-08-24 14:16:39,144 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 721 transitions. [2023-08-24 14:16:39,145 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:16:39,145 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 721 transitions. [2023-08-24 14:16:39,147 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 90.125) internal successors, (721), 8 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:16:39,149 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 186.0) internal successors, (1674), 9 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:16:39,149 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 186.0) internal successors, (1674), 9 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:16:39,149 INFO L175 Difference]: Start difference. First operand has 48 places, 35 transitions, 140 flow. Second operand 8 states and 721 transitions. [2023-08-24 14:16:39,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 70 transitions, 400 flow [2023-08-24 14:16:39,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 70 transitions, 379 flow, removed 3 selfloop flow, removed 4 redundant places. [2023-08-24 14:16:39,152 INFO L231 Difference]: Finished difference. Result has 52 places, 31 transitions, 125 flow [2023-08-24 14:16:39,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=125, PETRI_PLACES=52, PETRI_TRANSITIONS=31} [2023-08-24 14:16:39,152 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 18 predicate places. [2023-08-24 14:16:39,153 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 31 transitions, 125 flow [2023-08-24 14:16:39,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 86.0) internal successors, (602), 7 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:16:39,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:16:39,153 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:16:39,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-24 14:16:39,154 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 14:16:39,154 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:16:39,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1066884416, now seen corresponding path program 7 times [2023-08-24 14:16:39,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:16:39,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246206950] [2023-08-24 14:16:39,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:16:39,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:16:39,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:16:39,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:16:39,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:16:39,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246206950] [2023-08-24 14:16:39,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246206950] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 14:16:39,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 14:16:39,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 14:16:39,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301966871] [2023-08-24 14:16:39,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 14:16:39,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-24 14:16:39,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:16:39,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-24 14:16:39,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-24 14:16:39,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 186 [2023-08-24 14:16:39,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 31 transitions, 125 flow. Second operand has 6 states, 6 states have (on average 89.16666666666667) internal successors, (535), 6 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:16:39,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:16:39,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 186 [2023-08-24 14:16:39,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:16:39,429 INFO L124 PetriNetUnfolderBase]: 59/177 cut-off events. [2023-08-24 14:16:39,430 INFO L125 PetriNetUnfolderBase]: For 74/84 co-relation queries the response was YES. [2023-08-24 14:16:39,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 462 conditions, 177 events. 59/177 cut-off events. For 74/84 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 611 event pairs, 26 based on Foata normal form. 12/189 useless extension candidates. Maximal degree in co-relation 444. Up to 65 conditions per place. [2023-08-24 14:16:39,431 INFO L140 encePairwiseOnDemand]: 179/186 looper letters, 20 selfloop transitions, 5 changer transitions 9/44 dead transitions. [2023-08-24 14:16:39,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 44 transitions, 230 flow [2023-08-24 14:16:39,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 14:16:39,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 14:16:39,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 551 transitions. [2023-08-24 14:16:39,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49372759856630827 [2023-08-24 14:16:39,433 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 551 transitions. [2023-08-24 14:16:39,433 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 551 transitions. [2023-08-24 14:16:39,434 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:16:39,434 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 551 transitions. [2023-08-24 14:16:39,435 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 91.83333333333333) internal successors, (551), 6 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:16:39,436 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 186.0) internal successors, (1302), 7 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:16:39,437 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 186.0) internal successors, (1302), 7 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:16:39,437 INFO L175 Difference]: Start difference. First operand has 52 places, 31 transitions, 125 flow. Second operand 6 states and 551 transitions. [2023-08-24 14:16:39,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 44 transitions, 230 flow [2023-08-24 14:16:39,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 44 transitions, 202 flow, removed 2 selfloop flow, removed 11 redundant places. [2023-08-24 14:16:39,439 INFO L231 Difference]: Finished difference. Result has 47 places, 31 transitions, 116 flow [2023-08-24 14:16:39,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=116, PETRI_PLACES=47, PETRI_TRANSITIONS=31} [2023-08-24 14:16:39,440 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 13 predicate places. [2023-08-24 14:16:39,440 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 31 transitions, 116 flow [2023-08-24 14:16:39,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 89.16666666666667) internal successors, (535), 6 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:16:39,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:16:39,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:16:39,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-24 14:16:39,441 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 14:16:39,442 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:16:39,442 INFO L85 PathProgramCache]: Analyzing trace with hash 125621298, now seen corresponding path program 8 times [2023-08-24 14:16:39,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:16:39,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519035069] [2023-08-24 14:16:39,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:16:39,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:16:39,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:16:39,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:16:39,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:16:39,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519035069] [2023-08-24 14:16:39,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519035069] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 14:16:39,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 14:16:39,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-24 14:16:39,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373383749] [2023-08-24 14:16:39,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 14:16:39,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 14:16:39,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:16:39,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 14:16:39,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-08-24 14:16:39,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 186 [2023-08-24 14:16:39,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 31 transitions, 116 flow. Second operand has 7 states, 7 states have (on average 88.71428571428571) internal successors, (621), 7 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:16:39,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:16:39,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 186 [2023-08-24 14:16:39,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:16:39,729 INFO L124 PetriNetUnfolderBase]: 21/71 cut-off events. [2023-08-24 14:16:39,729 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2023-08-24 14:16:39,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 188 conditions, 71 events. 21/71 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 176 event pairs, 11 based on Foata normal form. 6/77 useless extension candidates. Maximal degree in co-relation 167. Up to 22 conditions per place. [2023-08-24 14:16:39,730 INFO L140 encePairwiseOnDemand]: 182/186 looper letters, 0 selfloop transitions, 0 changer transitions 22/22 dead transitions. [2023-08-24 14:16:39,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 22 transitions, 108 flow [2023-08-24 14:16:39,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 14:16:39,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 14:16:39,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 447 transitions. [2023-08-24 14:16:39,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4806451612903226 [2023-08-24 14:16:39,731 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 447 transitions. [2023-08-24 14:16:39,731 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 447 transitions. [2023-08-24 14:16:39,732 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:16:39,732 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 447 transitions. [2023-08-24 14:16:39,733 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 89.4) internal successors, (447), 5 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:16:39,734 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 186.0) internal successors, (1116), 6 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:16:39,734 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 186.0) internal successors, (1116), 6 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:16:39,734 INFO L175 Difference]: Start difference. First operand has 47 places, 31 transitions, 116 flow. Second operand 5 states and 447 transitions. [2023-08-24 14:16:39,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 22 transitions, 108 flow [2023-08-24 14:16:39,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 22 transitions, 97 flow, removed 2 selfloop flow, removed 6 redundant places. [2023-08-24 14:16:39,735 INFO L231 Difference]: Finished difference. Result has 33 places, 0 transitions, 0 flow [2023-08-24 14:16:39,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=57, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=33, PETRI_TRANSITIONS=0} [2023-08-24 14:16:39,736 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, -1 predicate places. [2023-08-24 14:16:39,736 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 0 transitions, 0 flow [2023-08-24 14:16:39,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 88.71428571428571) internal successors, (621), 7 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:16:39,738 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-08-24 14:16:39,739 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-24 14:16:39,739 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-24 14:16:39,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-24 14:16:39,739 INFO L445 BasicCegarLoop]: Path program histogram: [8] [2023-08-24 14:16:39,741 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-24 14:16:39,742 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-24 14:16:39,744 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.08 02:16:39 BasicIcfg [2023-08-24 14:16:39,744 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-24 14:16:39,745 INFO L158 Benchmark]: Toolchain (without parser) took 7041.41ms. Allocated memory was 404.8MB in the beginning and 511.7MB in the end (delta: 107.0MB). Free memory was 380.2MB in the beginning and 295.5MB in the end (delta: 84.6MB). Peak memory consumption was 194.7MB. Max. memory is 16.0GB. [2023-08-24 14:16:39,745 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 404.8MB. Free memory was 382.5MB in the beginning and 382.3MB in the end (delta: 157.4kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-24 14:16:39,745 INFO L158 Benchmark]: CACSL2BoogieTranslator took 271.34ms. Allocated memory is still 404.8MB. Free memory was 380.2MB in the beginning and 368.8MB in the end (delta: 11.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-24 14:16:39,745 INFO L158 Benchmark]: Boogie Procedure Inliner took 49.26ms. Allocated memory is still 404.8MB. Free memory was 368.8MB in the beginning and 366.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 14:16:39,745 INFO L158 Benchmark]: Boogie Preprocessor took 33.40ms. Allocated memory is still 404.8MB. Free memory was 366.7MB in the beginning and 365.5MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-24 14:16:39,746 INFO L158 Benchmark]: RCFGBuilder took 488.14ms. Allocated memory is still 404.8MB. Free memory was 365.5MB in the beginning and 345.7MB in the end (delta: 19.8MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. [2023-08-24 14:16:39,746 INFO L158 Benchmark]: TraceAbstraction took 6187.91ms. Allocated memory was 404.8MB in the beginning and 511.7MB in the end (delta: 107.0MB). Free memory was 345.7MB in the beginning and 295.5MB in the end (delta: 50.2MB). Peak memory consumption was 159.1MB. Max. memory is 16.0GB. [2023-08-24 14:16:39,747 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 404.8MB. Free memory was 382.5MB in the beginning and 382.3MB in the end (delta: 157.4kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 271.34ms. Allocated memory is still 404.8MB. Free memory was 380.2MB in the beginning and 368.8MB in the end (delta: 11.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 49.26ms. Allocated memory is still 404.8MB. Free memory was 368.8MB in the beginning and 366.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 33.40ms. Allocated memory is still 404.8MB. Free memory was 366.7MB in the beginning and 365.5MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 488.14ms. Allocated memory is still 404.8MB. Free memory was 365.5MB in the beginning and 345.7MB in the end (delta: 19.8MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. * TraceAbstraction took 6187.91ms. Allocated memory was 404.8MB in the beginning and 511.7MB in the end (delta: 107.0MB). Free memory was 345.7MB in the beginning and 295.5MB in the end (delta: 50.2MB). Peak memory consumption was 159.1MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.7s, 103 PlacesBefore, 34 PlacesAfterwards, 98 TransitionsBefore, 27 TransitionsAfterwards, 572 CoEnabledTransitionPairs, 7 FixpointIterations, 61 TrivialSequentialCompositions, 11 ConcurrentSequentialCompositions, 4 TrivialYvCompositions, 0 ConcurrentYvCompositions, 2 ChoiceCompositions, 78 TotalNumberOfCompositions, 4021 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2201, independent: 1933, independent conditional: 0, independent unconditional: 1933, dependent: 268, dependent conditional: 0, dependent unconditional: 268, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 286, independent: 270, independent conditional: 0, independent unconditional: 270, dependent: 16, dependent conditional: 0, dependent unconditional: 16, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 2201, independent: 1663, independent conditional: 0, independent unconditional: 1663, dependent: 252, dependent conditional: 0, dependent unconditional: 252, unknown: 286, unknown conditional: 0, unknown unconditional: 286] , Statistics on independence cache: Total cache size (in pairs): 109, Positive cache size: 95, Positive conditional cache size: 0, Positive unconditional cache size: 95, Negative cache size: 14, Negative conditional cache size: 0, Negative unconditional cache size: 14, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 130]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 133 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 6.1s, OverallIterations: 8, TraceHistogramMax: 1, PathProgramHistogramMax: 8, EmptinessCheckTime: 0.0s, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.8s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 169 SdHoareTripleChecker+Valid, 0.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 169 mSDsluCounter, 11 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2 mSDsCounter, 15 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 829 IncrementalHoareTripleChecker+Invalid, 844 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 15 mSolverCounterUnsat, 9 mSDtfsCounter, 829 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 50 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=141occurred in iteration=4, InterpolantAutomatonStates: 45, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.7s InterpolantComputationTime, 216 NumberOfCodeBlocks, 216 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 208 ConstructedInterpolants, 0 QuantifiedInterpolants, 921 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-24 14:16:39,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...