/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_42-trylock2_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 15:38:06,013 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 15:38:06,078 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2023-11-17 15:38:06,102 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 15:38:06,102 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 15:38:06,103 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 15:38:06,103 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 15:38:06,103 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 15:38:06,104 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 15:38:06,106 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 15:38:06,107 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 15:38:06,107 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 15:38:06,107 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 15:38:06,108 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 15:38:06,108 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 15:38:06,108 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 15:38:06,108 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 15:38:06,108 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 15:38:06,109 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 15:38:06,109 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 15:38:06,109 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 15:38:06,109 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 15:38:06,110 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 15:38:06,110 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 15:38:06,110 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 15:38:06,110 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 15:38:06,110 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 15:38:06,110 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 15:38:06,110 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 15:38:06,110 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 15:38:06,111 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 15:38:06,111 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 15:38:06,111 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-11-17 15:38:06,273 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 15:38:06,294 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 15:38:06,296 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 15:38:06,296 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 15:38:06,297 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 15:38:06,298 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_42-trylock2_racefree.i [2023-11-17 15:38:07,290 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 15:38:07,489 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 15:38:07,490 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_42-trylock2_racefree.i [2023-11-17 15:38:07,503 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2435cba21/f973a776dab6430aa0803f2c9805caa3/FLAG5dbf0d026 [2023-11-17 15:38:07,513 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2435cba21/f973a776dab6430aa0803f2c9805caa3 [2023-11-17 15:38:07,514 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 15:38:07,515 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 15:38:07,516 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 15:38:07,516 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 15:38:07,519 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 15:38:07,519 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:38:07" (1/1) ... [2023-11-17 15:38:07,520 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40ca80f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:07, skipping insertion in model container [2023-11-17 15:38:07,520 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:38:07" (1/1) ... [2023-11-17 15:38:07,551 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 15:38:07,783 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_42-trylock2_racefree.i[30176,30189] [2023-11-17 15:38:07,805 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 15:38:07,816 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 15:38:07,840 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_42-trylock2_racefree.i[30176,30189] [2023-11-17 15:38:07,851 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 15:38:07,882 INFO L206 MainTranslator]: Completed translation [2023-11-17 15:38:07,883 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:07 WrapperNode [2023-11-17 15:38:07,883 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 15:38:07,884 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 15:38:07,884 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 15:38:07,884 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 15:38:07,888 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:07" (1/1) ... [2023-11-17 15:38:07,898 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:07" (1/1) ... [2023-11-17 15:38:07,913 INFO L138 Inliner]: procedures = 172, calls = 60, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 152 [2023-11-17 15:38:07,913 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 15:38:07,914 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 15:38:07,914 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 15:38:07,914 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 15:38:07,920 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:07" (1/1) ... [2023-11-17 15:38:07,920 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:07" (1/1) ... [2023-11-17 15:38:07,926 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:07" (1/1) ... [2023-11-17 15:38:07,926 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:07" (1/1) ... [2023-11-17 15:38:07,930 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:07" (1/1) ... [2023-11-17 15:38:07,933 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:07" (1/1) ... [2023-11-17 15:38:07,935 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:07" (1/1) ... [2023-11-17 15:38:07,935 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:07" (1/1) ... [2023-11-17 15:38:07,937 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 15:38:07,938 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 15:38:07,938 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 15:38:07,938 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 15:38:07,939 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:07" (1/1) ... [2023-11-17 15:38:07,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 15:38:07,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:38:07,965 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-17 15:38:07,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-17 15:38:07,983 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 15:38:07,983 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 15:38:07,983 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-17 15:38:07,983 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 15:38:07,983 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 15:38:07,983 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-17 15:38:07,983 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-17 15:38:07,984 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 15:38:07,984 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexTryLock [2023-11-17 15:38:07,984 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 15:38:07,984 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-17 15:38:07,984 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 15:38:07,984 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 15:38:07,985 WARN L211 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-17 15:38:08,089 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 15:38:08,091 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 15:38:08,302 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 15:38:08,342 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 15:38:08,342 INFO L307 CfgBuilder]: Removed 23 assume(true) statements. [2023-11-17 15:38:08,343 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:38:08 BoogieIcfgContainer [2023-11-17 15:38:08,344 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 15:38:08,348 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 15:38:08,348 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 15:38:08,351 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 15:38:08,351 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 03:38:07" (1/3) ... [2023-11-17 15:38:08,351 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a366e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:38:08, skipping insertion in model container [2023-11-17 15:38:08,351 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:07" (2/3) ... [2023-11-17 15:38:08,352 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a366e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:38:08, skipping insertion in model container [2023-11-17 15:38:08,352 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:38:08" (3/3) ... [2023-11-17 15:38:08,353 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_42-trylock2_racefree.i [2023-11-17 15:38:08,365 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 15:38:08,365 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2023-11-17 15:38:08,366 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 15:38:08,411 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-17 15:38:08,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 181 places, 207 transitions, 421 flow [2023-11-17 15:38:08,497 INFO L124 PetriNetUnfolderBase]: 45/310 cut-off events. [2023-11-17 15:38:08,497 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 15:38:08,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 315 conditions, 310 events. 45/310 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1281 event pairs, 0 based on Foata normal form. 0/254 useless extension candidates. Maximal degree in co-relation 167. Up to 6 conditions per place. [2023-11-17 15:38:08,505 INFO L82 GeneralOperation]: Start removeDead. Operand has 181 places, 207 transitions, 421 flow [2023-11-17 15:38:08,510 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 177 places, 202 transitions, 408 flow [2023-11-17 15:38:08,512 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:38:08,520 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 177 places, 202 transitions, 408 flow [2023-11-17 15:38:08,522 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 177 places, 202 transitions, 408 flow [2023-11-17 15:38:08,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 177 places, 202 transitions, 408 flow [2023-11-17 15:38:08,566 INFO L124 PetriNetUnfolderBase]: 44/305 cut-off events. [2023-11-17 15:38:08,567 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:38:08,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 309 conditions, 305 events. 44/305 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1261 event pairs, 0 based on Foata normal form. 0/249 useless extension candidates. Maximal degree in co-relation 167. Up to 6 conditions per place. [2023-11-17 15:38:08,575 INFO L119 LiptonReduction]: Number of co-enabled transitions 12862 [2023-11-17 15:38:11,808 INFO L134 LiptonReduction]: Checked pairs total: 21346 [2023-11-17 15:38:11,809 INFO L136 LiptonReduction]: Total number of compositions: 186 [2023-11-17 15:38:11,819 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:38:11,823 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1d65d593, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:38:11,823 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-17 15:38:11,825 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:38:11,826 INFO L124 PetriNetUnfolderBase]: 3/15 cut-off events. [2023-11-17 15:38:11,826 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:38:11,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:38:11,826 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 15:38:11,826 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 15:38:11,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:38:11,830 INFO L85 PathProgramCache]: Analyzing trace with hash 28018704, now seen corresponding path program 1 times [2023-11-17 15:38:11,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:38:11,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851769737] [2023-11-17 15:38:11,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:38:11,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:38:11,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:38:12,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:38:12,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:38:12,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851769737] [2023-11-17 15:38:12,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851769737] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:38:12,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:38:12,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:38:12,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769353943] [2023-11-17 15:38:12,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:38:12,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:38:12,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:38:12,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:38:12,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:38:12,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 393 [2023-11-17 15:38:12,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 74 transitions, 152 flow. Second operand has 3 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:38:12,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:38:12,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 393 [2023-11-17 15:38:12,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:38:12,222 INFO L124 PetriNetUnfolderBase]: 433/930 cut-off events. [2023-11-17 15:38:12,222 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:38:12,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1829 conditions, 930 events. 433/930 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 4556 event pairs, 0 based on Foata normal form. 71/899 useless extension candidates. Maximal degree in co-relation 1801. Up to 876 conditions per place. [2023-11-17 15:38:12,227 INFO L140 encePairwiseOnDemand]: 365/393 looper letters, 56 selfloop transitions, 2 changer transitions 4/66 dead transitions. [2023-11-17 15:38:12,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 66 transitions, 260 flow [2023-11-17 15:38:12,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:38:12,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:38:12,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 517 transitions. [2023-11-17 15:38:12,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4385072094995759 [2023-11-17 15:38:12,241 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 517 transitions. [2023-11-17 15:38:12,241 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 517 transitions. [2023-11-17 15:38:12,244 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:38:12,245 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 517 transitions. [2023-11-17 15:38:12,249 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 172.33333333333334) internal successors, (517), 3 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:38:12,253 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 393.0) internal successors, (1572), 4 states have internal predecessors, (1572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:38:12,254 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 393.0) internal successors, (1572), 4 states have internal predecessors, (1572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:38:12,255 INFO L175 Difference]: Start difference. First operand has 52 places, 74 transitions, 152 flow. Second operand 3 states and 517 transitions. [2023-11-17 15:38:12,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 66 transitions, 260 flow [2023-11-17 15:38:12,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 66 transitions, 260 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:38:12,260 INFO L231 Difference]: Finished difference. Result has 54 places, 45 transitions, 102 flow [2023-11-17 15:38:12,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=54, PETRI_TRANSITIONS=45} [2023-11-17 15:38:12,264 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 2 predicate places. [2023-11-17 15:38:12,265 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 45 transitions, 102 flow [2023-11-17 15:38:12,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:38:12,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:38:12,265 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-17 15:38:12,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 15:38:12,266 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 15:38:12,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:38:12,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1136400872, now seen corresponding path program 1 times [2023-11-17 15:38:12,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:38:12,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421934742] [2023-11-17 15:38:12,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:38:12,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:38:12,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:38:12,299 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:38:12,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:38:12,345 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:38:12,346 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:38:12,347 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-17 15:38:12,348 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-17 15:38:12,348 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-17 15:38:12,348 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-17 15:38:12,348 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-17 15:38:12,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 15:38:12,349 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 15:38:12,350 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:38:12,350 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-17 15:38:12,376 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-17 15:38:12,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 231 places, 268 transitions, 552 flow [2023-11-17 15:38:12,419 INFO L124 PetriNetUnfolderBase]: 76/500 cut-off events. [2023-11-17 15:38:12,419 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-17 15:38:12,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 512 conditions, 500 events. 76/500 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2328 event pairs, 0 based on Foata normal form. 0/408 useless extension candidates. Maximal degree in co-relation 312. Up to 9 conditions per place. [2023-11-17 15:38:12,422 INFO L82 GeneralOperation]: Start removeDead. Operand has 231 places, 268 transitions, 552 flow [2023-11-17 15:38:12,424 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 231 places, 268 transitions, 552 flow [2023-11-17 15:38:12,425 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:38:12,425 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 231 places, 268 transitions, 552 flow [2023-11-17 15:38:12,425 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 231 places, 268 transitions, 552 flow [2023-11-17 15:38:12,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 231 places, 268 transitions, 552 flow [2023-11-17 15:38:12,460 INFO L124 PetriNetUnfolderBase]: 76/500 cut-off events. [2023-11-17 15:38:12,461 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-17 15:38:12,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 512 conditions, 500 events. 76/500 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2328 event pairs, 0 based on Foata normal form. 0/408 useless extension candidates. Maximal degree in co-relation 312. Up to 9 conditions per place. [2023-11-17 15:38:12,478 INFO L119 LiptonReduction]: Number of co-enabled transitions 33984 [2023-11-17 15:38:16,123 INFO L134 LiptonReduction]: Checked pairs total: 72102 [2023-11-17 15:38:16,123 INFO L136 LiptonReduction]: Total number of compositions: 244 [2023-11-17 15:38:16,125 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:38:16,125 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1d65d593, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:38:16,125 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-17 15:38:16,127 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:38:16,127 INFO L124 PetriNetUnfolderBase]: 3/13 cut-off events. [2023-11-17 15:38:16,127 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:38:16,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:38:16,127 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 15:38:16,128 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 15:38:16,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:38:16,128 INFO L85 PathProgramCache]: Analyzing trace with hash 45667694, now seen corresponding path program 1 times [2023-11-17 15:38:16,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:38:16,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819184409] [2023-11-17 15:38:16,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:38:16,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:38:16,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:38:16,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:38:16,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:38:16,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819184409] [2023-11-17 15:38:16,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819184409] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:38:16,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:38:16,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:38:16,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680997619] [2023-11-17 15:38:16,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:38:16,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:38:16,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:38:16,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:38:16,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:38:16,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 512 [2023-11-17 15:38:16,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 116 transitions, 248 flow. Second operand has 3 states, 3 states have (on average 175.33333333333334) internal successors, (526), 3 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:38:16,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:38:16,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 512 [2023-11-17 15:38:16,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:38:17,847 INFO L124 PetriNetUnfolderBase]: 15919/26473 cut-off events. [2023-11-17 15:38:17,847 INFO L125 PetriNetUnfolderBase]: For 78/78 co-relation queries the response was YES. [2023-11-17 15:38:17,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51076 conditions, 26473 events. 15919/26473 cut-off events. For 78/78 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 192948 event pairs, 7357 based on Foata normal form. 2251/26256 useless extension candidates. Maximal degree in co-relation 2931. Up to 24492 conditions per place. [2023-11-17 15:38:17,955 INFO L140 encePairwiseOnDemand]: 474/512 looper letters, 73 selfloop transitions, 2 changer transitions 9/99 dead transitions. [2023-11-17 15:38:17,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 99 transitions, 380 flow [2023-11-17 15:38:17,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:38:17,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:38:17,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 653 transitions. [2023-11-17 15:38:17,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4251302083333333 [2023-11-17 15:38:17,958 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 653 transitions. [2023-11-17 15:38:17,958 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 653 transitions. [2023-11-17 15:38:17,958 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:38:17,958 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 653 transitions. [2023-11-17 15:38:17,959 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 217.66666666666666) internal successors, (653), 3 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:38:17,962 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 512.0) internal successors, (2048), 4 states have internal predecessors, (2048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:38:17,963 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 512.0) internal successors, (2048), 4 states have internal predecessors, (2048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:38:17,963 INFO L175 Difference]: Start difference. First operand has 83 places, 116 transitions, 248 flow. Second operand 3 states and 653 transitions. [2023-11-17 15:38:17,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 99 transitions, 380 flow [2023-11-17 15:38:17,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 99 transitions, 380 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:38:17,966 INFO L231 Difference]: Finished difference. Result has 86 places, 73 transitions, 166 flow [2023-11-17 15:38:17,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=512, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=166, PETRI_PLACES=86, PETRI_TRANSITIONS=73} [2023-11-17 15:38:17,967 INFO L281 CegarLoopForPetriNet]: 83 programPoint places, 3 predicate places. [2023-11-17 15:38:17,967 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 73 transitions, 166 flow [2023-11-17 15:38:17,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 175.33333333333334) internal successors, (526), 3 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:38:17,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:38:17,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:38:17,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 15:38:17,969 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 15:38:17,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:38:17,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1916729017, now seen corresponding path program 1 times [2023-11-17 15:38:17,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:38:17,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108265719] [2023-11-17 15:38:17,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:38:17,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:38:17,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:38:18,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:38:18,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:38:18,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108265719] [2023-11-17 15:38:18,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108265719] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:38:18,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676192590] [2023-11-17 15:38:18,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:38:18,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:38:18,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:38:18,037 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:38:18,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-17 15:38:18,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:38:18,125 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-17 15:38:18,126 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:38:18,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:38:18,160 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:38:18,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:38:18,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676192590] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:38:18,172 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:38:18,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-17 15:38:18,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641910958] [2023-11-17 15:38:18,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:38:18,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 15:38:18,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:38:18,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 15:38:18,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-17 15:38:18,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 512 [2023-11-17 15:38:18,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 73 transitions, 166 flow. Second operand has 7 states, 7 states have (on average 176.28571428571428) internal successors, (1234), 7 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:38:18,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:38:18,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 512 [2023-11-17 15:38:18,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:38:18,456 INFO L124 PetriNetUnfolderBase]: 1392/2710 cut-off events. [2023-11-17 15:38:18,456 INFO L125 PetriNetUnfolderBase]: For 629/629 co-relation queries the response was YES. [2023-11-17 15:38:18,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5405 conditions, 2710 events. 1392/2710 cut-off events. For 629/629 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 16358 event pairs, 34 based on Foata normal form. 306/3015 useless extension candidates. Maximal degree in co-relation 319. Up to 1666 conditions per place. [2023-11-17 15:38:18,465 INFO L140 encePairwiseOnDemand]: 509/512 looper letters, 85 selfloop transitions, 3 changer transitions 0/102 dead transitions. [2023-11-17 15:38:18,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 102 transitions, 398 flow [2023-11-17 15:38:18,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 15:38:18,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 15:38:18,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 960 transitions. [2023-11-17 15:38:18,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2023-11-17 15:38:18,468 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 960 transitions. [2023-11-17 15:38:18,468 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 960 transitions. [2023-11-17 15:38:18,469 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:38:18,469 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 960 transitions. [2023-11-17 15:38:18,471 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 192.0) internal successors, (960), 5 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:38:18,473 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 512.0) internal successors, (3072), 6 states have internal predecessors, (3072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:38:18,474 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 512.0) internal successors, (3072), 6 states have internal predecessors, (3072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:38:18,474 INFO L175 Difference]: Start difference. First operand has 86 places, 73 transitions, 166 flow. Second operand 5 states and 960 transitions. [2023-11-17 15:38:18,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 102 transitions, 398 flow [2023-11-17 15:38:18,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 102 transitions, 396 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 15:38:18,479 INFO L231 Difference]: Finished difference. Result has 62 places, 52 transitions, 126 flow [2023-11-17 15:38:18,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=512, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=126, PETRI_PLACES=62, PETRI_TRANSITIONS=52} [2023-11-17 15:38:18,480 INFO L281 CegarLoopForPetriNet]: 83 programPoint places, -21 predicate places. [2023-11-17 15:38:18,481 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 52 transitions, 126 flow [2023-11-17 15:38:18,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 176.28571428571428) internal successors, (1234), 7 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:38:18,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:38:18,481 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-17 15:38:18,489 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-17 15:38:18,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:38:18,690 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 15:38:18,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:38:18,691 INFO L85 PathProgramCache]: Analyzing trace with hash -111964515, now seen corresponding path program 1 times [2023-11-17 15:38:18,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:38:18,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620548755] [2023-11-17 15:38:18,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:38:18,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:38:18,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:38:18,713 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:38:18,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:38:18,732 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:38:18,732 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:38:18,732 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-17 15:38:18,732 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-17 15:38:18,733 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-17 15:38:18,733 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-17 15:38:18,733 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-17 15:38:18,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 15:38:18,734 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-17 15:38:18,734 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:38:18,735 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-17 15:38:18,764 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-17 15:38:18,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 281 places, 329 transitions, 685 flow [2023-11-17 15:38:18,856 INFO L124 PetriNetUnfolderBase]: 112/725 cut-off events. [2023-11-17 15:38:18,856 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-17 15:38:18,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 750 conditions, 725 events. 112/725 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 3519 event pairs, 1 based on Foata normal form. 0/593 useless extension candidates. Maximal degree in co-relation 508. Up to 16 conditions per place. [2023-11-17 15:38:18,862 INFO L82 GeneralOperation]: Start removeDead. Operand has 281 places, 329 transitions, 685 flow [2023-11-17 15:38:18,866 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 281 places, 329 transitions, 685 flow [2023-11-17 15:38:18,866 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:38:18,867 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 281 places, 329 transitions, 685 flow [2023-11-17 15:38:18,867 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 281 places, 329 transitions, 685 flow [2023-11-17 15:38:18,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 281 places, 329 transitions, 685 flow [2023-11-17 15:38:18,940 INFO L124 PetriNetUnfolderBase]: 112/725 cut-off events. [2023-11-17 15:38:18,940 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-17 15:38:18,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 750 conditions, 725 events. 112/725 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 3519 event pairs, 1 based on Foata normal form. 0/593 useless extension candidates. Maximal degree in co-relation 508. Up to 16 conditions per place. [2023-11-17 15:38:18,966 INFO L119 LiptonReduction]: Number of co-enabled transitions 61950 [2023-11-17 15:38:23,522 INFO L134 LiptonReduction]: Checked pairs total: 138024 [2023-11-17 15:38:23,523 INFO L136 LiptonReduction]: Total number of compositions: 288 [2023-11-17 15:38:23,524 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:38:23,525 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1d65d593, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:38:23,525 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-17 15:38:23,526 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:38:23,526 INFO L124 PetriNetUnfolderBase]: 3/13 cut-off events. [2023-11-17 15:38:23,526 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:38:23,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:38:23,526 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 15:38:23,527 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 15:38:23,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:38:23,527 INFO L85 PathProgramCache]: Analyzing trace with hash 66515804, now seen corresponding path program 1 times [2023-11-17 15:38:23,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:38:23,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923687130] [2023-11-17 15:38:23,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:38:23,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:38:23,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:38:23,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:38:23,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:38:23,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923687130] [2023-11-17 15:38:23,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923687130] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:38:23,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:38:23,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:38:23,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95436587] [2023-11-17 15:38:23,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:38:23,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:38:23,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:38:23,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:38:23,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:38:23,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 617 [2023-11-17 15:38:23,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 152 transitions, 331 flow. Second operand has 3 states, 3 states have (on average 210.33333333333334) internal successors, (631), 3 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:38:23,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:38:23,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 617 [2023-11-17 15:38:23,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand