/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_03-munge_racing.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 18:43:55,675 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 18:43:55,714 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 [2023-08-26 18:43:55,721 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 18:43:55,721 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 18:43:55,751 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 18:43:55,752 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 18:43:55,752 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 18:43:55,753 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 18:43:55,755 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 18:43:55,755 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 18:43:55,755 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 18:43:55,756 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 18:43:55,757 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 18:43:55,757 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 18:43:55,757 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 18:43:55,757 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 18:43:55,757 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 18:43:55,757 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 18:43:55,757 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 18:43:55,758 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 18:43:55,758 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 18:43:55,758 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 18:43:55,758 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 18:43:55,758 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 18:43:55,759 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 18:43:55,759 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 18:43:55,759 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 18:43:55,759 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 18:43:55,759 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 18:43:55,760 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 18:43:55,760 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 18:43:55,760 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 18:43:55,760 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 18:43:55,760 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 18:43:55,760 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 18:43:55,988 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 18:43:56,002 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 18:43:56,004 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 18:43:56,005 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 18:43:56,005 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 18:43:56,006 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_03-munge_racing.i [2023-08-26 18:43:56,884 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 18:43:57,096 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 18:43:57,097 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_03-munge_racing.i [2023-08-26 18:43:57,109 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d35e3f683/2a2bf86369124e4b92f18bdd69bc00b0/FLAGeefd72d9d [2023-08-26 18:43:57,117 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d35e3f683/2a2bf86369124e4b92f18bdd69bc00b0 [2023-08-26 18:43:57,119 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 18:43:57,120 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 18:43:57,121 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 18:43:57,121 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 18:43:57,122 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 18:43:57,123 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 06:43:57" (1/1) ... [2023-08-26 18:43:57,123 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14a40775 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:43:57, skipping insertion in model container [2023-08-26 18:43:57,123 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 06:43:57" (1/1) ... [2023-08-26 18:43:57,159 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 18:43:57,423 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 18:43:57,436 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 18:43:57,460 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-26 18:43:57,461 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-26 18:43:57,482 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 18:43:57,516 INFO L206 MainTranslator]: Completed translation [2023-08-26 18:43:57,516 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:43:57 WrapperNode [2023-08-26 18:43:57,516 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 18:43:57,517 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 18:43:57,517 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 18:43:57,518 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 18:43:57,522 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:43:57" (1/1) ... [2023-08-26 18:43:57,548 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:43:57" (1/1) ... [2023-08-26 18:43:57,575 INFO L138 Inliner]: procedures = 172, calls = 44, calls flagged for inlining = 6, calls inlined = 8, statements flattened = 211 [2023-08-26 18:43:57,575 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 18:43:57,576 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 18:43:57,577 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 18:43:57,577 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 18:43:57,582 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:43:57" (1/1) ... [2023-08-26 18:43:57,582 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:43:57" (1/1) ... [2023-08-26 18:43:57,598 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:43:57" (1/1) ... [2023-08-26 18:43:57,598 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:43:57" (1/1) ... [2023-08-26 18:43:57,602 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:43:57" (1/1) ... [2023-08-26 18:43:57,605 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:43:57" (1/1) ... [2023-08-26 18:43:57,606 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:43:57" (1/1) ... [2023-08-26 18:43:57,607 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:43:57" (1/1) ... [2023-08-26 18:43:57,609 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 18:43:57,610 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 18:43:57,610 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 18:43:57,610 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 18:43:57,621 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:43:57" (1/1) ... [2023-08-26 18:43:57,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 18:43:57,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 18:43:57,640 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) [2023-08-26 18:43:57,659 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 [2023-08-26 18:43:57,667 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 18:43:57,667 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2023-08-26 18:43:57,667 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2023-08-26 18:43:57,667 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 18:43:57,667 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-26 18:43:57,667 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 18:43:57,668 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 18:43:57,668 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2023-08-26 18:43:57,668 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2023-08-26 18:43:57,668 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 18:43:57,668 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 18:43:57,668 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 18:43:57,668 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 18:43:57,669 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-26 18:43:57,792 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 18:43:57,793 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 18:43:58,061 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 18:43:58,067 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 18:43:58,067 INFO L302 CfgBuilder]: Removed 24 assume(true) statements. [2023-08-26 18:43:58,068 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 06:43:58 BoogieIcfgContainer [2023-08-26 18:43:58,068 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 18:43:58,070 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 18:43:58,070 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 18:43:58,072 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 18:43:58,072 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 06:43:57" (1/3) ... [2023-08-26 18:43:58,072 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dc89142 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 06:43:58, skipping insertion in model container [2023-08-26 18:43:58,073 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:43:57" (2/3) ... [2023-08-26 18:43:58,073 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dc89142 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 06:43:58, skipping insertion in model container [2023-08-26 18:43:58,073 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 06:43:58" (3/3) ... [2023-08-26 18:43:58,074 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_03-munge_racing.i [2023-08-26 18:43:58,085 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 18:43:58,085 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-08-26 18:43:58,086 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 18:43:58,164 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-26 18:43:58,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 189 places, 218 transitions, 458 flow [2023-08-26 18:43:58,313 INFO L124 PetriNetUnfolderBase]: 61/410 cut-off events. [2023-08-26 18:43:58,314 INFO L125 PetriNetUnfolderBase]: For 8/10 co-relation queries the response was YES. [2023-08-26 18:43:58,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 430 conditions, 410 events. 61/410 cut-off events. For 8/10 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1847 event pairs, 0 based on Foata normal form. 0/312 useless extension candidates. Maximal degree in co-relation 218. Up to 8 conditions per place. [2023-08-26 18:43:58,327 INFO L82 GeneralOperation]: Start removeDead. Operand has 189 places, 218 transitions, 458 flow [2023-08-26 18:43:58,336 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 189 places, 218 transitions, 458 flow [2023-08-26 18:43:58,338 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 18:43:58,346 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 189 places, 218 transitions, 458 flow [2023-08-26 18:43:58,350 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 189 places, 218 transitions, 458 flow [2023-08-26 18:43:58,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 189 places, 218 transitions, 458 flow [2023-08-26 18:43:58,391 INFO L124 PetriNetUnfolderBase]: 61/410 cut-off events. [2023-08-26 18:43:58,391 INFO L125 PetriNetUnfolderBase]: For 8/10 co-relation queries the response was YES. [2023-08-26 18:43:58,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 430 conditions, 410 events. 61/410 cut-off events. For 8/10 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1847 event pairs, 0 based on Foata normal form. 0/312 useless extension candidates. Maximal degree in co-relation 218. Up to 8 conditions per place. [2023-08-26 18:43:58,402 INFO L119 LiptonReduction]: Number of co-enabled transitions 19952 [2023-08-26 18:44:01,676 INFO L134 LiptonReduction]: Checked pairs total: 37279 [2023-08-26 18:44:01,676 INFO L136 LiptonReduction]: Total number of compositions: 170 [2023-08-26 18:44:01,684 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 18:44:01,688 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;@7ac003ad, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 18:44:01,689 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2023-08-26 18:44:01,692 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 18:44:01,692 INFO L124 PetriNetUnfolderBase]: 0/3 cut-off events. [2023-08-26 18:44:01,692 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:44:01,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:44:01,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 18:44:01,694 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr0ASSERT_VIOLATIONASSERT (and 9 more)] === [2023-08-26 18:44:01,697 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:44:01,697 INFO L85 PathProgramCache]: Analyzing trace with hash 28342, now seen corresponding path program 1 times [2023-08-26 18:44:01,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:44:01,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82792545] [2023-08-26 18:44:01,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:44:01,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:44:01,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:44:01,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:44:01,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:44:01,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82792545] [2023-08-26 18:44:01,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82792545] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:44:01,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:44:01,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 18:44:01,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272113760] [2023-08-26 18:44:01,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:44:01,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:44:01,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:44:01,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:44:01,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:44:01,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 388 [2023-08-26 18:44:01,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 90 transitions, 202 flow. Second operand has 3 states, 3 states have (on average 156.66666666666666) internal successors, (470), 3 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:44:01,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:44:01,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 388 [2023-08-26 18:44:01,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:44:02,601 INFO L124 PetriNetUnfolderBase]: 5554/10121 cut-off events. [2023-08-26 18:44:02,602 INFO L125 PetriNetUnfolderBase]: For 106/106 co-relation queries the response was YES. [2023-08-26 18:44:02,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18777 conditions, 10121 events. 5554/10121 cut-off events. For 106/106 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 77355 event pairs, 2472 based on Foata normal form. 1269/8521 useless extension candidates. Maximal degree in co-relation 18020. Up to 8513 conditions per place. [2023-08-26 18:44:02,642 INFO L140 encePairwiseOnDemand]: 363/388 looper letters, 67 selfloop transitions, 2 changer transitions 0/84 dead transitions. [2023-08-26 18:44:02,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 84 transitions, 328 flow [2023-08-26 18:44:02,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:44:02,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:44:02,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 570 transitions. [2023-08-26 18:44:02,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4896907216494845 [2023-08-26 18:44:02,653 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 570 transitions. [2023-08-26 18:44:02,654 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 570 transitions. [2023-08-26 18:44:02,655 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:44:02,656 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 570 transitions. [2023-08-26 18:44:02,659 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 190.0) internal successors, (570), 3 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:44:02,702 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 388.0) internal successors, (1552), 4 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:44:02,702 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 388.0) internal successors, (1552), 4 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:44:02,704 INFO L175 Difference]: Start difference. First operand has 68 places, 90 transitions, 202 flow. Second operand 3 states and 570 transitions. [2023-08-26 18:44:02,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 84 transitions, 328 flow [2023-08-26 18:44:02,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 84 transitions, 328 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 18:44:02,709 INFO L231 Difference]: Finished difference. Result has 70 places, 68 transitions, 168 flow [2023-08-26 18:44:02,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=168, PETRI_PLACES=70, PETRI_TRANSITIONS=68} [2023-08-26 18:44:02,712 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 2 predicate places. [2023-08-26 18:44:02,712 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 68 transitions, 168 flow [2023-08-26 18:44:02,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 156.66666666666666) internal successors, (470), 3 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:44:02,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:44:02,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 18:44:02,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 18:44:02,713 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr0ASSERT_VIOLATIONASSERT (and 9 more)] === [2023-08-26 18:44:02,713 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:44:02,713 INFO L85 PathProgramCache]: Analyzing trace with hash 28340, now seen corresponding path program 1 times [2023-08-26 18:44:02,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:44:02,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745477539] [2023-08-26 18:44:02,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:44:02,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:44:02,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:44:02,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:44:02,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:44:02,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745477539] [2023-08-26 18:44:02,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745477539] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:44:02,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:44:02,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 18:44:02,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081180567] [2023-08-26 18:44:02,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:44:02,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:44:02,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:44:02,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:44:02,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:44:02,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 388 [2023-08-26 18:44:02,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 68 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 160.66666666666666) internal successors, (482), 3 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:44:02,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:44:02,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 388 [2023-08-26 18:44:02,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:44:03,287 INFO L124 PetriNetUnfolderBase]: 5269/9316 cut-off events. [2023-08-26 18:44:03,288 INFO L125 PetriNetUnfolderBase]: For 133/133 co-relation queries the response was YES. [2023-08-26 18:44:03,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17398 conditions, 9316 events. 5269/9316 cut-off events. For 133/133 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 67238 event pairs, 4496 based on Foata normal form. 0/6694 useless extension candidates. Maximal degree in co-relation 17291. Up to 7298 conditions per place. [2023-08-26 18:44:03,327 INFO L140 encePairwiseOnDemand]: 384/388 looper letters, 75 selfloop transitions, 2 changer transitions 0/92 dead transitions. [2023-08-26 18:44:03,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 92 transitions, 370 flow [2023-08-26 18:44:03,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:44:03,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:44:03,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 559 transitions. [2023-08-26 18:44:03,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4802405498281787 [2023-08-26 18:44:03,330 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 559 transitions. [2023-08-26 18:44:03,330 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 559 transitions. [2023-08-26 18:44:03,331 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:44:03,331 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 559 transitions. [2023-08-26 18:44:03,332 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 186.33333333333334) internal successors, (559), 3 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:44:03,335 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 388.0) internal successors, (1552), 4 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:44:03,336 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 388.0) internal successors, (1552), 4 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:44:03,336 INFO L175 Difference]: Start difference. First operand has 70 places, 68 transitions, 168 flow. Second operand 3 states and 559 transitions. [2023-08-26 18:44:03,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 92 transitions, 370 flow [2023-08-26 18:44:03,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 92 transitions, 366 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 18:44:03,340 INFO L231 Difference]: Finished difference. Result has 68 places, 66 transitions, 164 flow [2023-08-26 18:44:03,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=164, PETRI_PLACES=68, PETRI_TRANSITIONS=66} [2023-08-26 18:44:03,341 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 0 predicate places. [2023-08-26 18:44:03,341 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 66 transitions, 164 flow [2023-08-26 18:44:03,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 160.66666666666666) internal successors, (482), 3 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:44:03,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:44:03,344 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 18:44:03,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 18:44:03,345 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr0ASSERT_VIOLATIONASSERT (and 9 more)] === [2023-08-26 18:44:03,348 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:44:03,348 INFO L85 PathProgramCache]: Analyzing trace with hash 844990010, now seen corresponding path program 1 times [2023-08-26 18:44:03,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:44:03,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236755187] [2023-08-26 18:44:03,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:44:03,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:44:03,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:44:03,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:44:03,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:44:03,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236755187] [2023-08-26 18:44:03,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236755187] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 18:44:03,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953491155] [2023-08-26 18:44:03,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:44:03,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 18:44:03,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 18:44:03,478 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) [2023-08-26 18:44:03,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-26 18:44:03,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:44:03,544 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-26 18:44:03,547 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 18:44:03,593 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-26 18:44:03,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:44:03,619 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 18:44:03,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:44:03,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953491155] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 18:44:03,657 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 18:44:03,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-08-26 18:44:03,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863164785] [2023-08-26 18:44:03,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 18:44:03,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 18:44:03,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:44:03,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 18:44:03,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-26 18:44:03,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 388 [2023-08-26 18:44:03,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 66 transitions, 164 flow. Second operand has 8 states, 8 states have (on average 157.875) internal successors, (1263), 8 states have internal predecessors, (1263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:44:03,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:44:03,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 388 [2023-08-26 18:44:03,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:44:03,726 INFO L124 PetriNetUnfolderBase]: 31/94 cut-off events. [2023-08-26 18:44:03,727 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-26 18:44:03,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 202 conditions, 94 events. 31/94 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 297 event pairs, 6 based on Foata normal form. 15/103 useless extension candidates. Maximal degree in co-relation 196. Up to 58 conditions per place. [2023-08-26 18:44:03,727 INFO L140 encePairwiseOnDemand]: 384/388 looper letters, 11 selfloop transitions, 2 changer transitions 24/38 dead transitions. [2023-08-26 18:44:03,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 38 transitions, 151 flow [2023-08-26 18:44:03,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 18:44:03,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 18:44:03,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 659 transitions. [2023-08-26 18:44:03,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42461340206185566 [2023-08-26 18:44:03,729 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 659 transitions. [2023-08-26 18:44:03,729 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 659 transitions. [2023-08-26 18:44:03,729 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:44:03,730 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 659 transitions. [2023-08-26 18:44:03,731 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 164.75) internal successors, (659), 4 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:44:03,733 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 388.0) internal successors, (1940), 5 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:44:03,733 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 388.0) internal successors, (1940), 5 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:44:03,734 INFO L175 Difference]: Start difference. First operand has 68 places, 66 transitions, 164 flow. Second operand 4 states and 659 transitions. [2023-08-26 18:44:03,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 38 transitions, 151 flow [2023-08-26 18:44:03,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 38 transitions, 148 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 18:44:03,734 INFO L231 Difference]: Finished difference. Result has 30 places, 9 transitions, 28 flow [2023-08-26 18:44:03,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=28, PETRI_PLACES=30, PETRI_TRANSITIONS=9} [2023-08-26 18:44:03,735 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -38 predicate places. [2023-08-26 18:44:03,735 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 9 transitions, 28 flow [2023-08-26 18:44:03,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 157.875) internal successors, (1263), 8 states have internal predecessors, (1263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:44:03,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:44:03,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:44:03,743 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-26 18:44:03,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 18:44:03,940 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1_funErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr0ASSERT_VIOLATIONASSERT (and 9 more)] === [2023-08-26 18:44:03,941 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:44:03,941 INFO L85 PathProgramCache]: Analyzing trace with hash 286498930, now seen corresponding path program 1 times [2023-08-26 18:44:03,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:44:03,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540156599] [2023-08-26 18:44:03,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:44:03,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:44:03,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:44:03,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:44:03,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:44:03,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540156599] [2023-08-26 18:44:03,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540156599] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:44:03,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:44:03,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 18:44:03,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089502] [2023-08-26 18:44:03,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:44:03,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:44:03,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:44:03,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:44:03,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:44:03,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 388 [2023-08-26 18:44:03,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 9 transitions, 28 flow. Second operand has 3 states, 3 states have (on average 173.33333333333334) internal successors, (520), 3 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:44:03,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:44:03,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 388 [2023-08-26 18:44:03,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:44:03,999 INFO L124 PetriNetUnfolderBase]: 6/21 cut-off events. [2023-08-26 18:44:03,999 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-26 18:44:03,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55 conditions, 21 events. 6/21 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 29 event pairs, 6 based on Foata normal form. 3/24 useless extension candidates. Maximal degree in co-relation 50. Up to 20 conditions per place. [2023-08-26 18:44:03,999 INFO L140 encePairwiseOnDemand]: 386/388 looper letters, 0 selfloop transitions, 0 changer transitions 8/8 dead transitions. [2023-08-26 18:44:03,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 18 places, 8 transitions, 40 flow [2023-08-26 18:44:04,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:44:04,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:44:04,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 521 transitions. [2023-08-26 18:44:04,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4475945017182131 [2023-08-26 18:44:04,001 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 521 transitions. [2023-08-26 18:44:04,001 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 521 transitions. [2023-08-26 18:44:04,002 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:44:04,002 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 521 transitions. [2023-08-26 18:44:04,002 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:44:04,004 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 388.0) internal successors, (1552), 4 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:44:04,005 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 388.0) internal successors, (1552), 4 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:44:04,005 INFO L175 Difference]: Start difference. First operand has 30 places, 9 transitions, 28 flow. Second operand 3 states and 521 transitions. [2023-08-26 18:44:04,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 18 places, 8 transitions, 40 flow [2023-08-26 18:44:04,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 16 places, 8 transitions, 37 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 18:44:04,006 INFO L231 Difference]: Finished difference. Result has 16 places, 0 transitions, 0 flow [2023-08-26 18:44:04,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=23, PETRI_DIFFERENCE_MINUEND_PLACES=14, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=8, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=16, PETRI_TRANSITIONS=0} [2023-08-26 18:44:04,008 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -52 predicate places. [2023-08-26 18:44:04,008 INFO L495 AbstractCegarLoop]: Abstraction has has 16 places, 0 transitions, 0 flow [2023-08-26 18:44:04,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 173.33333333333334) internal successors, (520), 3 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:44:04,010 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 12 remaining) [2023-08-26 18:44:04,010 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 12 remaining) [2023-08-26 18:44:04,010 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr0ASSERT_VIOLATIONASSERT (9 of 12 remaining) [2023-08-26 18:44:04,010 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 12 remaining) [2023-08-26 18:44:04,010 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 12 remaining) [2023-08-26 18:44:04,011 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 12 remaining) [2023-08-26 18:44:04,011 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr0ASSERT_VIOLATIONASSERT (5 of 12 remaining) [2023-08-26 18:44:04,013 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr0ASSERT_VIOLATIONASSERT (4 of 12 remaining) [2023-08-26 18:44:04,013 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr0ASSERT_VIOLATIONASSERT (3 of 12 remaining) [2023-08-26 18:44:04,013 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 12 remaining) [2023-08-26 18:44:04,013 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 12 remaining) [2023-08-26 18:44:04,014 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 12 remaining) [2023-08-26 18:44:04,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 18:44:04,014 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-26 18:44:04,015 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-26 18:44:04,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 189 places, 218 transitions, 458 flow [2023-08-26 18:44:04,052 INFO L124 PetriNetUnfolderBase]: 61/410 cut-off events. [2023-08-26 18:44:04,053 INFO L125 PetriNetUnfolderBase]: For 8/10 co-relation queries the response was YES. [2023-08-26 18:44:04,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 430 conditions, 410 events. 61/410 cut-off events. For 8/10 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1847 event pairs, 0 based on Foata normal form. 0/312 useless extension candidates. Maximal degree in co-relation 218. Up to 8 conditions per place. [2023-08-26 18:44:04,055 INFO L82 GeneralOperation]: Start removeDead. Operand has 189 places, 218 transitions, 458 flow [2023-08-26 18:44:04,056 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 189 places, 218 transitions, 458 flow [2023-08-26 18:44:04,056 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 18:44:04,056 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 189 places, 218 transitions, 458 flow [2023-08-26 18:44:04,056 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 189 places, 218 transitions, 458 flow [2023-08-26 18:44:04,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 189 places, 218 transitions, 458 flow [2023-08-26 18:44:04,079 INFO L124 PetriNetUnfolderBase]: 61/410 cut-off events. [2023-08-26 18:44:04,079 INFO L125 PetriNetUnfolderBase]: For 8/10 co-relation queries the response was YES. [2023-08-26 18:44:04,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 430 conditions, 410 events. 61/410 cut-off events. For 8/10 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1847 event pairs, 0 based on Foata normal form. 0/312 useless extension candidates. Maximal degree in co-relation 218. Up to 8 conditions per place. [2023-08-26 18:44:04,089 INFO L119 LiptonReduction]: Number of co-enabled transitions 19952 [2023-08-26 18:44:07,182 INFO L134 LiptonReduction]: Checked pairs total: 34207 [2023-08-26 18:44:07,183 INFO L136 LiptonReduction]: Total number of compositions: 170 [2023-08-26 18:44:07,184 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 18:44:07,185 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;@7ac003ad, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 18:44:07,185 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-26 18:44:07,188 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 18:44:07,188 INFO L124 PetriNetUnfolderBase]: 3/35 cut-off events. [2023-08-26 18:44:07,188 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:44:07,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:44:07,188 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-26 18:44:07,188 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 18:44:07,189 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:44:07,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1147578866, now seen corresponding path program 1 times [2023-08-26 18:44:07,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:44:07,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153990957] [2023-08-26 18:44:07,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:44:07,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:44:07,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 18:44:07,207 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 18:44:07,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 18:44:07,233 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 18:44:07,233 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 18:44:07,233 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-26 18:44:07,233 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-26 18:44:07,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 18:44:07,234 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 18:44:07,234 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (2/2) [2023-08-26 18:44:07,235 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 18:44:07,235 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-26 18:44:07,286 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-26 18:44:07,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 285 places, 340 transitions, 728 flow [2023-08-26 18:44:07,449 INFO L124 PetriNetUnfolderBase]: 205/1208 cut-off events. [2023-08-26 18:44:07,450 INFO L125 PetriNetUnfolderBase]: For 72/78 co-relation queries the response was YES. [2023-08-26 18:44:07,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1305 conditions, 1208 events. 205/1208 cut-off events. For 72/78 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 7470 event pairs, 1 based on Foata normal form. 0/920 useless extension candidates. Maximal degree in co-relation 733. Up to 32 conditions per place. [2023-08-26 18:44:07,460 INFO L82 GeneralOperation]: Start removeDead. Operand has 285 places, 340 transitions, 728 flow [2023-08-26 18:44:07,466 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 285 places, 340 transitions, 728 flow [2023-08-26 18:44:07,466 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 18:44:07,466 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 285 places, 340 transitions, 728 flow [2023-08-26 18:44:07,466 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 285 places, 340 transitions, 728 flow [2023-08-26 18:44:07,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 285 places, 340 transitions, 728 flow [2023-08-26 18:44:07,579 INFO L124 PetriNetUnfolderBase]: 205/1208 cut-off events. [2023-08-26 18:44:07,580 INFO L125 PetriNetUnfolderBase]: For 72/78 co-relation queries the response was YES. [2023-08-26 18:44:07,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1305 conditions, 1208 events. 205/1208 cut-off events. For 72/78 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 7470 event pairs, 1 based on Foata normal form. 0/920 useless extension candidates. Maximal degree in co-relation 733. Up to 32 conditions per place. [2023-08-26 18:44:07,632 INFO L119 LiptonReduction]: Number of co-enabled transitions 69136 [2023-08-26 18:44:11,088 INFO L134 LiptonReduction]: Checked pairs total: 148900 [2023-08-26 18:44:11,088 INFO L136 LiptonReduction]: Total number of compositions: 245 [2023-08-26 18:44:11,094 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 18:44:11,098 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;@7ac003ad, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 18:44:11,098 INFO L358 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2023-08-26 18:44:11,099 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 18:44:11,099 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-08-26 18:44:11,099 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:44:11,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:44:11,099 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 18:44:11,099 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t1_funErr0ASSERT_VIOLATIONASSERT, t2_funErr0ASSERT_VIOLATIONASSERT (and 11 more)] === [2023-08-26 18:44:11,099 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:44:11,100 INFO L85 PathProgramCache]: Analyzing trace with hash 56347, now seen corresponding path program 1 times [2023-08-26 18:44:11,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:44:11,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275841226] [2023-08-26 18:44:11,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:44:11,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:44:11,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:44:11,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:44:11,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:44:11,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275841226] [2023-08-26 18:44:11,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275841226] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:44:11,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:44:11,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 18:44:11,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441977577] [2023-08-26 18:44:11,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:44:11,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:44:11,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:44:11,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:44:11,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:44:11,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 246 out of 585 [2023-08-26 18:44:11,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 165 transitions, 378 flow. Second operand has 3 states, 3 states have (on average 246.66666666666666) internal successors, (740), 3 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:44:11,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:44:11,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 246 of 585 [2023-08-26 18:44:11,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand