/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 INSUFFICIENT_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/chl-match-subst.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 07:34:18,566 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 07:34:18,652 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 07:34:18,656 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 07:34:18,657 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 07:34:18,687 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 07:34:18,688 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 07:34:18,692 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 07:34:18,693 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 07:34:18,696 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 07:34:18,697 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 07:34:18,697 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 07:34:18,697 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 07:34:18,698 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 07:34:18,698 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 07:34:18,699 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 07:34:18,699 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 07:34:18,699 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 07:34:18,699 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 07:34:18,699 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 07:34:18,700 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 07:34:18,700 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 07:34:18,700 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 07:34:18,701 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 07:34:18,701 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 07:34:18,701 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 07:34:18,701 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 07:34:18,701 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 07:34:18,702 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 07:34:18,702 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 07:34:18,703 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 07:34:18,703 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 07:34:18,703 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 07:34:18,703 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 07:34:18,703 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 07:34:18,704 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-24 07:34:19,004 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 07:34:19,019 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 07:34:19,021 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 07:34:19,022 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 07:34:19,022 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 07:34:19,023 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-match-subst.wvr.c [2023-08-24 07:34:20,090 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 07:34:20,281 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 07:34:20,282 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-match-subst.wvr.c [2023-08-24 07:34:20,287 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f6a09c9c/fb2456cbdf3642ec84d35bce2b6b33ba/FLAGc866011d5 [2023-08-24 07:34:20,297 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f6a09c9c/fb2456cbdf3642ec84d35bce2b6b33ba [2023-08-24 07:34:20,299 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 07:34:20,300 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 07:34:20,301 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 07:34:20,301 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 07:34:20,303 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 07:34:20,304 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 07:34:20" (1/1) ... [2023-08-24 07:34:20,305 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ddae08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 07:34:20, skipping insertion in model container [2023-08-24 07:34:20,305 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 07:34:20" (1/1) ... [2023-08-24 07:34:20,323 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 07:34:20,485 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/chl-match-subst.wvr.c[3017,3030] [2023-08-24 07:34:20,494 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 07:34:20,503 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 07:34:20,536 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/chl-match-subst.wvr.c[3017,3030] [2023-08-24 07:34:20,542 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 07:34:20,557 INFO L206 MainTranslator]: Completed translation [2023-08-24 07:34:20,558 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 07:34:20 WrapperNode [2023-08-24 07:34:20,558 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 07:34:20,559 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 07:34:20,560 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 07:34:20,560 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 07:34:20,565 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 07:34:20" (1/1) ... [2023-08-24 07:34:20,582 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 07:34:20" (1/1) ... [2023-08-24 07:34:20,617 INFO L138 Inliner]: procedures = 23, calls = 34, calls flagged for inlining = 12, calls inlined = 22, statements flattened = 215 [2023-08-24 07:34:20,618 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 07:34:20,619 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 07:34:20,619 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 07:34:20,619 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 07:34:20,627 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 07:34:20" (1/1) ... [2023-08-24 07:34:20,627 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 07:34:20" (1/1) ... [2023-08-24 07:34:20,640 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 07:34:20" (1/1) ... [2023-08-24 07:34:20,640 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 07:34:20" (1/1) ... [2023-08-24 07:34:20,645 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 07:34:20" (1/1) ... [2023-08-24 07:34:20,647 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 07:34:20" (1/1) ... [2023-08-24 07:34:20,656 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 07:34:20" (1/1) ... [2023-08-24 07:34:20,657 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 07:34:20" (1/1) ... [2023-08-24 07:34:20,659 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 07:34:20,659 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 07:34:20,659 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 07:34:20,659 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 07:34:20,660 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 07:34:20" (1/1) ... [2023-08-24 07:34:20,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 07:34:20,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 07:34:20,702 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 07:34:20,722 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 07:34:20,734 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 07:34:20,734 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-24 07:34:20,734 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-24 07:34:20,734 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-24 07:34:20,734 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-24 07:34:20,734 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-24 07:34:20,735 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-24 07:34:20,735 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 07:34:20,735 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 07:34:20,735 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 07:34:20,735 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 07:34:20,735 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 07:34:20,735 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 07:34:20,735 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 07:34:20,737 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 07:34:20,832 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 07:34:20,834 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 07:34:21,226 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 07:34:21,241 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 07:34:21,242 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-08-24 07:34:21,244 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 07:34:21 BoogieIcfgContainer [2023-08-24 07:34:21,244 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 07:34:21,246 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 07:34:21,246 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 07:34:21,249 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 07:34:21,249 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 07:34:20" (1/3) ... [2023-08-24 07:34:21,249 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f9bd68f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 07:34:21, skipping insertion in model container [2023-08-24 07:34:21,250 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 07:34:20" (2/3) ... [2023-08-24 07:34:21,250 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f9bd68f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 07:34:21, skipping insertion in model container [2023-08-24 07:34:21,250 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 07:34:21" (3/3) ... [2023-08-24 07:34:21,252 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-match-subst.wvr.c [2023-08-24 07:34:21,265 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 07:34:21,266 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 07:34:21,266 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 07:34:21,389 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-24 07:34:21,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 251 places, 255 transitions, 534 flow [2023-08-24 07:34:21,518 INFO L124 PetriNetUnfolderBase]: 14/252 cut-off events. [2023-08-24 07:34:21,518 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 07:34:21,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 265 conditions, 252 events. 14/252 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 336 event pairs, 0 based on Foata normal form. 0/237 useless extension candidates. Maximal degree in co-relation 173. Up to 2 conditions per place. [2023-08-24 07:34:21,525 INFO L82 GeneralOperation]: Start removeDead. Operand has 251 places, 255 transitions, 534 flow [2023-08-24 07:34:21,531 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 238 places, 242 transitions, 502 flow [2023-08-24 07:34:21,535 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 07:34:21,548 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 238 places, 242 transitions, 502 flow [2023-08-24 07:34:21,552 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 238 places, 242 transitions, 502 flow [2023-08-24 07:34:21,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 238 places, 242 transitions, 502 flow [2023-08-24 07:34:21,625 INFO L124 PetriNetUnfolderBase]: 14/242 cut-off events. [2023-08-24 07:34:21,625 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 07:34:21,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 255 conditions, 242 events. 14/242 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 336 event pairs, 0 based on Foata normal form. 0/228 useless extension candidates. Maximal degree in co-relation 173. Up to 2 conditions per place. [2023-08-24 07:34:21,640 INFO L119 LiptonReduction]: Number of co-enabled transitions 16638 [2023-08-24 07:34:29,007 INFO L134 LiptonReduction]: Checked pairs total: 14869 [2023-08-24 07:34:29,008 INFO L136 LiptonReduction]: Total number of compositions: 283 [2023-08-24 07:34:29,019 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 07:34:29,024 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;@2e9f742f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 07:34:29,025 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-24 07:34:29,029 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 07:34:29,029 INFO L124 PetriNetUnfolderBase]: 0/15 cut-off events. [2023-08-24 07:34:29,029 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 07:34:29,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 07:34:29,030 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 07:34:29,030 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 07:34:29,034 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 07:34:29,034 INFO L85 PathProgramCache]: Analyzing trace with hash 261538114, now seen corresponding path program 1 times [2023-08-24 07:34:29,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 07:34:29,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964371553] [2023-08-24 07:34:29,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 07:34:29,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 07:34:29,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 07:34:30,832 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 07:34:30,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 07:34:30,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964371553] [2023-08-24 07:34:30,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964371553] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 07:34:30,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 07:34:30,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 07:34:30,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524129739] [2023-08-24 07:34:30,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 07:34:30,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 07:34:30,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 07:34:30,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 07:34:30,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-24 07:34:30,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 538 [2023-08-24 07:34:30,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 16 transitions, 50 flow. Second operand has 5 states, 5 states have (on average 205.2) internal successors, (1026), 5 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states 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 07:34:30,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 07:34:30,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 538 [2023-08-24 07:34:30,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 07:34:31,363 INFO L124 PetriNetUnfolderBase]: 38/100 cut-off events. [2023-08-24 07:34:31,364 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2023-08-24 07:34:31,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 233 conditions, 100 events. 38/100 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 278 event pairs, 2 based on Foata normal form. 1/101 useless extension candidates. Maximal degree in co-relation 169. Up to 38 conditions per place. [2023-08-24 07:34:31,365 INFO L140 encePairwiseOnDemand]: 533/538 looper letters, 32 selfloop transitions, 6 changer transitions 7/45 dead transitions. [2023-08-24 07:34:31,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 45 transitions, 228 flow [2023-08-24 07:34:31,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 07:34:31,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 07:34:31,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1258 transitions. [2023-08-24 07:34:31,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38971499380421315 [2023-08-24 07:34:31,382 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1258 transitions. [2023-08-24 07:34:31,382 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1258 transitions. [2023-08-24 07:34:31,385 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 07:34:31,387 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1258 transitions. [2023-08-24 07:34:31,392 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 209.66666666666666) internal successors, (1258), 6 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states 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 07:34:31,400 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 538.0) internal successors, (3766), 7 states have internal predecessors, (3766), 0 states have call successors, (0), 0 states 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 07:34:31,402 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 538.0) internal successors, (3766), 7 states have internal predecessors, (3766), 0 states have call successors, (0), 0 states 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 07:34:31,403 INFO L175 Difference]: Start difference. First operand has 26 places, 16 transitions, 50 flow. Second operand 6 states and 1258 transitions. [2023-08-24 07:34:31,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 45 transitions, 228 flow [2023-08-24 07:34:31,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 45 transitions, 196 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-24 07:34:31,407 INFO L231 Difference]: Finished difference. Result has 28 places, 20 transitions, 71 flow [2023-08-24 07:34:31,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=538, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=71, PETRI_PLACES=28, PETRI_TRANSITIONS=20} [2023-08-24 07:34:31,411 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 2 predicate places. [2023-08-24 07:34:31,412 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 20 transitions, 71 flow [2023-08-24 07:34:31,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 205.2) internal successors, (1026), 5 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states 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 07:34:31,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 07:34:31,413 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 07:34:31,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 07:34:31,413 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 07:34:31,414 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 07:34:31,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1663843490, now seen corresponding path program 2 times [2023-08-24 07:34:31,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 07:34:31,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495081579] [2023-08-24 07:34:31,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 07:34:31,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 07:34:31,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 07:34:32,323 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 07:34:32,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 07:34:32,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495081579] [2023-08-24 07:34:32,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495081579] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 07:34:32,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 07:34:32,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 07:34:32,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62726836] [2023-08-24 07:34:32,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 07:34:32,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 07:34:32,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 07:34:32,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 07:34:32,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-24 07:34:32,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 538 [2023-08-24 07:34:32,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 20 transitions, 71 flow. Second operand has 5 states, 5 states have (on average 205.2) internal successors, (1026), 5 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states 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 07:34:32,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 07:34:32,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 538 [2023-08-24 07:34:32,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 07:34:32,557 INFO L124 PetriNetUnfolderBase]: 38/116 cut-off events. [2023-08-24 07:34:32,557 INFO L125 PetriNetUnfolderBase]: For 55/55 co-relation queries the response was YES. [2023-08-24 07:34:32,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 324 conditions, 116 events. 38/116 cut-off events. For 55/55 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 405 event pairs, 6 based on Foata normal form. 1/117 useless extension candidates. Maximal degree in co-relation 309. Up to 58 conditions per place. [2023-08-24 07:34:32,558 INFO L140 encePairwiseOnDemand]: 533/538 looper letters, 30 selfloop transitions, 7 changer transitions 9/46 dead transitions. [2023-08-24 07:34:32,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 46 transitions, 235 flow [2023-08-24 07:34:32,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 07:34:32,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 07:34:32,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1258 transitions. [2023-08-24 07:34:32,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38971499380421315 [2023-08-24 07:34:32,564 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1258 transitions. [2023-08-24 07:34:32,565 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1258 transitions. [2023-08-24 07:34:32,565 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 07:34:32,565 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1258 transitions. [2023-08-24 07:34:32,568 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 209.66666666666666) internal successors, (1258), 6 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states 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 07:34:32,573 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 538.0) internal successors, (3766), 7 states have internal predecessors, (3766), 0 states have call successors, (0), 0 states 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 07:34:32,574 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 538.0) internal successors, (3766), 7 states have internal predecessors, (3766), 0 states have call successors, (0), 0 states 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 07:34:32,574 INFO L175 Difference]: Start difference. First operand has 28 places, 20 transitions, 71 flow. Second operand 6 states and 1258 transitions. [2023-08-24 07:34:32,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 46 transitions, 235 flow [2023-08-24 07:34:32,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 46 transitions, 231 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-24 07:34:32,578 INFO L231 Difference]: Finished difference. Result has 34 places, 21 transitions, 100 flow [2023-08-24 07:34:32,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=538, PETRI_DIFFERENCE_MINUEND_FLOW=69, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=100, PETRI_PLACES=34, PETRI_TRANSITIONS=21} [2023-08-24 07:34:32,579 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 8 predicate places. [2023-08-24 07:34:32,579 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 21 transitions, 100 flow [2023-08-24 07:34:32,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 205.2) internal successors, (1026), 5 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states 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 07:34:32,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 07:34:32,580 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 07:34:32,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-24 07:34:32,582 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 07:34:32,588 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 07:34:32,588 INFO L85 PathProgramCache]: Analyzing trace with hash 338435884, now seen corresponding path program 3 times [2023-08-24 07:34:32,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 07:34:32,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877264100] [2023-08-24 07:34:32,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 07:34:32,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 07:34:32,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 07:34:33,338 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 07:34:33,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 07:34:33,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877264100] [2023-08-24 07:34:33,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877264100] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 07:34:33,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 07:34:33,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 07:34:33,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426038894] [2023-08-24 07:34:33,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 07:34:33,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 07:34:33,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 07:34:33,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 07:34:33,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-24 07:34:33,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 538 [2023-08-24 07:34:33,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 21 transitions, 100 flow. Second operand has 5 states, 5 states have (on average 205.2) internal successors, (1026), 5 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states 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 07:34:33,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 07:34:33,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 538 [2023-08-24 07:34:33,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 07:34:33,563 INFO L124 PetriNetUnfolderBase]: 33/103 cut-off events. [2023-08-24 07:34:33,564 INFO L125 PetriNetUnfolderBase]: For 160/160 co-relation queries the response was YES. [2023-08-24 07:34:33,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 349 conditions, 103 events. 33/103 cut-off events. For 160/160 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 337 event pairs, 2 based on Foata normal form. 1/104 useless extension candidates. Maximal degree in co-relation 334. Up to 51 conditions per place. [2023-08-24 07:34:33,566 INFO L140 encePairwiseOnDemand]: 533/538 looper letters, 27 selfloop transitions, 6 changer transitions 11/44 dead transitions. [2023-08-24 07:34:33,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 44 transitions, 257 flow [2023-08-24 07:34:33,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 07:34:33,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 07:34:33,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1256 transitions. [2023-08-24 07:34:33,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38909541511771994 [2023-08-24 07:34:33,570 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1256 transitions. [2023-08-24 07:34:33,570 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1256 transitions. [2023-08-24 07:34:33,571 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 07:34:33,571 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1256 transitions. [2023-08-24 07:34:33,574 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 209.33333333333334) internal successors, (1256), 6 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states 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 07:34:33,578 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 538.0) internal successors, (3766), 7 states have internal predecessors, (3766), 0 states have call successors, (0), 0 states 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 07:34:33,580 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 538.0) internal successors, (3766), 7 states have internal predecessors, (3766), 0 states have call successors, (0), 0 states 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 07:34:33,580 INFO L175 Difference]: Start difference. First operand has 34 places, 21 transitions, 100 flow. Second operand 6 states and 1256 transitions. [2023-08-24 07:34:33,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 44 transitions, 257 flow [2023-08-24 07:34:33,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 44 transitions, 243 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-08-24 07:34:33,584 INFO L231 Difference]: Finished difference. Result has 38 places, 20 transitions, 100 flow [2023-08-24 07:34:33,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=538, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=100, PETRI_PLACES=38, PETRI_TRANSITIONS=20} [2023-08-24 07:34:33,585 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 12 predicate places. [2023-08-24 07:34:33,588 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 20 transitions, 100 flow [2023-08-24 07:34:33,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 205.2) internal successors, (1026), 5 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states 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 07:34:33,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 07:34:33,589 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 07:34:33,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-24 07:34:33,590 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 07:34:33,590 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 07:34:33,590 INFO L85 PathProgramCache]: Analyzing trace with hash -919140992, now seen corresponding path program 4 times [2023-08-24 07:34:33,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 07:34:33,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286573831] [2023-08-24 07:34:33,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 07:34:33,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 07:34:33,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 07:34:34,533 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 07:34:34,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 07:34:34,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286573831] [2023-08-24 07:34:34,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286573831] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 07:34:34,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 07:34:34,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 07:34:34,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672318411] [2023-08-24 07:34:34,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 07:34:34,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 07:34:34,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 07:34:34,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 07:34:34,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-24 07:34:34,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 538 [2023-08-24 07:34:34,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 20 transitions, 100 flow. Second operand has 5 states, 5 states have (on average 205.2) internal successors, (1026), 5 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states 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 07:34:34,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 07:34:34,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 538 [2023-08-24 07:34:34,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 07:34:34,792 INFO L124 PetriNetUnfolderBase]: 17/59 cut-off events. [2023-08-24 07:34:34,792 INFO L125 PetriNetUnfolderBase]: For 94/94 co-relation queries the response was YES. [2023-08-24 07:34:34,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 219 conditions, 59 events. 17/59 cut-off events. For 94/94 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 138 event pairs, 0 based on Foata normal form. 1/60 useless extension candidates. Maximal degree in co-relation 205. Up to 20 conditions per place. [2023-08-24 07:34:34,793 INFO L140 encePairwiseOnDemand]: 533/538 looper letters, 18 selfloop transitions, 5 changer transitions 13/36 dead transitions. [2023-08-24 07:34:34,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 36 transitions, 219 flow [2023-08-24 07:34:34,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 07:34:34,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 07:34:34,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1248 transitions. [2023-08-24 07:34:34,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38661710037174724 [2023-08-24 07:34:34,797 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1248 transitions. [2023-08-24 07:34:34,797 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1248 transitions. [2023-08-24 07:34:34,798 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 07:34:34,798 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1248 transitions. [2023-08-24 07:34:34,800 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 208.0) internal successors, (1248), 6 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states 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 07:34:34,805 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 538.0) internal successors, (3766), 7 states have internal predecessors, (3766), 0 states have call successors, (0), 0 states 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 07:34:34,806 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 538.0) internal successors, (3766), 7 states have internal predecessors, (3766), 0 states have call successors, (0), 0 states 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 07:34:34,806 INFO L175 Difference]: Start difference. First operand has 38 places, 20 transitions, 100 flow. Second operand 6 states and 1248 transitions. [2023-08-24 07:34:34,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 36 transitions, 219 flow [2023-08-24 07:34:34,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 36 transitions, 202 flow, removed 3 selfloop flow, removed 5 redundant places. [2023-08-24 07:34:34,808 INFO L231 Difference]: Finished difference. Result has 37 places, 18 transitions, 81 flow [2023-08-24 07:34:34,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=538, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=81, PETRI_PLACES=37, PETRI_TRANSITIONS=18} [2023-08-24 07:34:34,809 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 11 predicate places. [2023-08-24 07:34:34,809 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 18 transitions, 81 flow [2023-08-24 07:34:34,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 205.2) internal successors, (1026), 5 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states 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 07:34:34,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 07:34:34,809 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 07:34:34,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-24 07:34:34,810 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 07:34:34,810 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 07:34:34,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1626899268, now seen corresponding path program 5 times [2023-08-24 07:34:34,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 07:34:34,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108753447] [2023-08-24 07:34:34,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 07:34:34,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 07:34:34,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 07:34:35,566 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 07:34:35,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 07:34:35,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108753447] [2023-08-24 07:34:35,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108753447] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 07:34:35,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 07:34:35,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 07:34:35,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491574544] [2023-08-24 07:34:35,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 07:34:35,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 07:34:35,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 07:34:35,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 07:34:35,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-24 07:34:35,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 538 [2023-08-24 07:34:35,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 18 transitions, 81 flow. Second operand has 5 states, 5 states have (on average 205.2) internal successors, (1026), 5 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states 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 07:34:35,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 07:34:35,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 538 [2023-08-24 07:34:35,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 07:34:35,842 INFO L124 PetriNetUnfolderBase]: 8/40 cut-off events. [2023-08-24 07:34:35,842 INFO L125 PetriNetUnfolderBase]: For 42/42 co-relation queries the response was YES. [2023-08-24 07:34:35,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146 conditions, 40 events. 8/40 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 61 event pairs, 0 based on Foata normal form. 1/41 useless extension candidates. Maximal degree in co-relation 134. Up to 19 conditions per place. [2023-08-24 07:34:35,842 INFO L140 encePairwiseOnDemand]: 533/538 looper letters, 15 selfloop transitions, 3 changer transitions 12/30 dead transitions. [2023-08-24 07:34:35,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 30 transitions, 178 flow [2023-08-24 07:34:35,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 07:34:35,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 07:34:35,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1243 transitions. [2023-08-24 07:34:35,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3850681536555142 [2023-08-24 07:34:35,847 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1243 transitions. [2023-08-24 07:34:35,847 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1243 transitions. [2023-08-24 07:34:35,847 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 07:34:35,847 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1243 transitions. [2023-08-24 07:34:35,850 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 207.16666666666666) internal successors, (1243), 6 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states 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 07:34:35,853 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 538.0) internal successors, (3766), 7 states have internal predecessors, (3766), 0 states have call successors, (0), 0 states 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 07:34:35,854 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 538.0) internal successors, (3766), 7 states have internal predecessors, (3766), 0 states have call successors, (0), 0 states 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 07:34:35,854 INFO L175 Difference]: Start difference. First operand has 37 places, 18 transitions, 81 flow. Second operand 6 states and 1243 transitions. [2023-08-24 07:34:35,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 30 transitions, 178 flow [2023-08-24 07:34:35,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 30 transitions, 144 flow, removed 4 selfloop flow, removed 9 redundant places. [2023-08-24 07:34:35,856 INFO L231 Difference]: Finished difference. Result has 33 places, 16 transitions, 56 flow [2023-08-24 07:34:35,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=538, PETRI_DIFFERENCE_MINUEND_FLOW=53, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=56, PETRI_PLACES=33, PETRI_TRANSITIONS=16} [2023-08-24 07:34:35,857 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 7 predicate places. [2023-08-24 07:34:35,857 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 16 transitions, 56 flow [2023-08-24 07:34:35,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 205.2) internal successors, (1026), 5 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states 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 07:34:35,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 07:34:35,858 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 07:34:35,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-24 07:34:35,858 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 07:34:35,858 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 07:34:35,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1923365530, now seen corresponding path program 6 times [2023-08-24 07:34:35,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 07:34:35,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828604442] [2023-08-24 07:34:35,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 07:34:35,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 07:34:35,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 07:34:36,782 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 07:34:36,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 07:34:36,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828604442] [2023-08-24 07:34:36,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828604442] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 07:34:36,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 07:34:36,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 07:34:36,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453147985] [2023-08-24 07:34:36,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 07:34:36,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 07:34:36,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 07:34:36,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 07:34:36,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-24 07:34:36,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 538 [2023-08-24 07:34:36,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 16 transitions, 56 flow. Second operand has 5 states, 5 states have (on average 205.2) internal successors, (1026), 5 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states 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 07:34:36,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 07:34:36,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 538 [2023-08-24 07:34:36,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 07:34:37,040 INFO L124 PetriNetUnfolderBase]: 3/21 cut-off events. [2023-08-24 07:34:37,040 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-24 07:34:37,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69 conditions, 21 events. 3/21 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 9 event pairs, 0 based on Foata normal form. 1/22 useless extension candidates. Maximal degree in co-relation 62. Up to 8 conditions per place. [2023-08-24 07:34:37,040 INFO L140 encePairwiseOnDemand]: 533/538 looper letters, 0 selfloop transitions, 0 changer transitions 18/18 dead transitions. [2023-08-24 07:34:37,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 18 transitions, 94 flow [2023-08-24 07:34:37,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 07:34:37,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 07:34:37,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1231 transitions. [2023-08-24 07:34:37,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38135068153655516 [2023-08-24 07:34:37,045 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1231 transitions. [2023-08-24 07:34:37,045 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1231 transitions. [2023-08-24 07:34:37,046 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 07:34:37,046 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1231 transitions. [2023-08-24 07:34:37,048 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 205.16666666666666) internal successors, (1231), 6 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states 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 07:34:37,052 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 538.0) internal successors, (3766), 7 states have internal predecessors, (3766), 0 states have call successors, (0), 0 states 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 07:34:37,053 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 538.0) internal successors, (3766), 7 states have internal predecessors, (3766), 0 states have call successors, (0), 0 states 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 07:34:37,053 INFO L175 Difference]: Start difference. First operand has 33 places, 16 transitions, 56 flow. Second operand 6 states and 1231 transitions. [2023-08-24 07:34:37,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 18 transitions, 94 flow [2023-08-24 07:34:37,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 18 transitions, 82 flow, removed 1 selfloop flow, removed 6 redundant places. [2023-08-24 07:34:37,054 INFO L231 Difference]: Finished difference. Result has 29 places, 0 transitions, 0 flow [2023-08-24 07:34:37,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=538, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=29, PETRI_TRANSITIONS=0} [2023-08-24 07:34:37,057 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 3 predicate places. [2023-08-24 07:34:37,057 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 0 transitions, 0 flow [2023-08-24 07:34:37,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 205.2) internal successors, (1026), 5 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states 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 07:34:37,063 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-08-24 07:34:37,063 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-08-24 07:34:37,063 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-24 07:34:37,063 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-24 07:34:37,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-24 07:34:37,064 INFO L445 BasicCegarLoop]: Path program histogram: [6] [2023-08-24 07:34:37,066 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-24 07:34:37,066 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-24 07:34:37,070 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.08 07:34:37 BasicIcfg [2023-08-24 07:34:37,070 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-24 07:34:37,073 INFO L158 Benchmark]: Toolchain (without parser) took 16773.26ms. Allocated memory was 360.7MB in the beginning and 627.0MB in the end (delta: 266.3MB). Free memory was 335.9MB in the beginning and 389.3MB in the end (delta: -53.4MB). Peak memory consumption was 216.1MB. Max. memory is 16.0GB. [2023-08-24 07:34:37,075 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 360.7MB. Free memory was 338.3MB in the beginning and 338.1MB in the end (delta: 157.3kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-24 07:34:37,077 INFO L158 Benchmark]: CACSL2BoogieTranslator took 256.92ms. Allocated memory is still 360.7MB. Free memory was 335.9MB in the beginning and 324.5MB in the end (delta: 11.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-24 07:34:37,078 INFO L158 Benchmark]: Boogie Procedure Inliner took 58.50ms. Allocated memory is still 360.7MB. Free memory was 323.6MB in the beginning and 321.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 07:34:37,078 INFO L158 Benchmark]: Boogie Preprocessor took 39.70ms. Allocated memory is still 360.7MB. Free memory was 321.5MB in the beginning and 320.3MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 07:34:37,078 INFO L158 Benchmark]: RCFGBuilder took 584.72ms. Allocated memory is still 360.7MB. Free memory was 320.3MB in the beginning and 298.5MB in the end (delta: 21.9MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. [2023-08-24 07:34:37,078 INFO L158 Benchmark]: TraceAbstraction took 15826.73ms. Allocated memory was 360.7MB in the beginning and 627.0MB in the end (delta: 266.3MB). Free memory was 297.3MB in the beginning and 389.3MB in the end (delta: -92.0MB). Peak memory consumption was 176.3MB. Max. memory is 16.0GB. [2023-08-24 07:34:37,080 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 360.7MB. Free memory was 338.3MB in the beginning and 338.1MB in the end (delta: 157.3kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 256.92ms. Allocated memory is still 360.7MB. Free memory was 335.9MB in the beginning and 324.5MB in the end (delta: 11.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 58.50ms. Allocated memory is still 360.7MB. Free memory was 323.6MB in the beginning and 321.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 39.70ms. Allocated memory is still 360.7MB. Free memory was 321.5MB in the beginning and 320.3MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 584.72ms. Allocated memory is still 360.7MB. Free memory was 320.3MB in the beginning and 298.5MB in the end (delta: 21.9MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. * TraceAbstraction took 15826.73ms. Allocated memory was 360.7MB in the beginning and 627.0MB in the end (delta: 266.3MB). Free memory was 297.3MB in the beginning and 389.3MB in the end (delta: -92.0MB). Peak memory consumption was 176.3MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 7.5s, 238 PlacesBefore, 26 PlacesAfterwards, 242 TransitionsBefore, 16 TransitionsAfterwards, 16638 CoEnabledTransitionPairs, 8 FixpointIterations, 73 TrivialSequentialCompositions, 144 ConcurrentSequentialCompositions, 6 TrivialYvCompositions, 46 ConcurrentYvCompositions, 14 ChoiceCompositions, 283 TotalNumberOfCompositions, 14869 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 14869, independent: 14869, independent conditional: 0, independent unconditional: 14869, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 9977, independent: 9977, independent conditional: 0, independent unconditional: 9977, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 14869, independent: 4892, independent conditional: 0, independent unconditional: 4892, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 9977, unknown conditional: 0, unknown unconditional: 9977] , Statistics on independence cache: Total cache size (in pairs): 18, Positive cache size: 18, Positive conditional cache size: 0, Positive unconditional cache size: 18, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 89]: 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 7 procedures, 377 locations, 4 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: 15.6s, OverallIterations: 6, TraceHistogramMax: 1, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 1.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 7.6s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 180 SdHoareTripleChecker+Valid, 0.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 180 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 8 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 430 IncrementalHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 8 mSolverCounterUnsat, 0 mSDtfsCounter, 430 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=100occurred in iteration=2, InterpolantAutomatonStates: 36, 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, 0.4s SatisfiabilityAnalysisTime, 5.6s InterpolantComputationTime, 96 NumberOfCodeBlocks, 96 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 90 ConstructedInterpolants, 0 QuantifiedInterpolants, 2990 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 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 07:34:37,098 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...