/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 -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 12:28:49,527 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 12:28:49,566 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 12:28:49,569 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 12:28:49,569 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 12:28:49,595 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 12:28:49,596 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 12:28:49,596 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 12:28:49,596 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 12:28:49,596 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 12:28:49,597 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 12:28:49,597 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 12:28:49,597 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 12:28:49,597 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 12:28:49,598 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 12:28:49,598 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 12:28:49,598 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 12:28:49,598 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 12:28:49,598 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 12:28:49,599 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 12:28:49,599 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 12:28:49,602 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 12:28:49,602 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 12:28:49,602 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 12:28:49,603 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 12:28:49,604 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 12:28:49,604 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 12:28:49,604 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 12:28:49,604 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 12:28:49,604 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 12:28:49,604 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 12:28:49,605 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 12:28:49,605 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 12:28:49,605 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 12:28:49,605 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 12:28:49,605 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 12:28:49,846 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 12:28:49,859 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 12:28:49,861 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 12:28:49,862 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 12:28:49,863 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 12:28:49,864 INFO L431 ainManager$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 12:28:50,764 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 12:28:50,970 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 12:28:50,970 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_03-munge_racing.i [2023-08-26 12:28:50,985 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/04cdcfdcd/7a8de9d0fabe4ec6bf5f8df42608c37f/FLAGff8cc4ac7 [2023-08-26 12:28:50,993 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/04cdcfdcd/7a8de9d0fabe4ec6bf5f8df42608c37f [2023-08-26 12:28:50,994 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 12:28:50,995 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 12:28:50,996 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 12:28:50,996 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 12:28:50,998 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 12:28:50,998 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 12:28:50" (1/1) ... [2023-08-26 12:28:50,999 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d8253f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:28:50, skipping insertion in model container [2023-08-26 12:28:50,999 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 12:28:50" (1/1) ... [2023-08-26 12:28:51,039 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 12:28:51,294 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 12:28:51,308 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 12:28:51,332 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-26 12:28:51,333 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-26 12:28:51,357 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 12:28:51,390 INFO L206 MainTranslator]: Completed translation [2023-08-26 12:28:51,392 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:28:51 WrapperNode [2023-08-26 12:28:51,392 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 12:28:51,393 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 12:28:51,393 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 12:28:51,393 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 12:28:51,398 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:28:51" (1/1) ... [2023-08-26 12:28:51,423 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:28:51" (1/1) ... [2023-08-26 12:28:51,448 INFO L138 Inliner]: procedures = 172, calls = 44, calls flagged for inlining = 6, calls inlined = 8, statements flattened = 211 [2023-08-26 12:28:51,448 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 12:28:51,449 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 12:28:51,449 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 12:28:51,449 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 12:28:51,455 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:28:51" (1/1) ... [2023-08-26 12:28:51,455 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:28:51" (1/1) ... [2023-08-26 12:28:51,468 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:28:51" (1/1) ... [2023-08-26 12:28:51,468 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:28:51" (1/1) ... [2023-08-26 12:28:51,476 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:28:51" (1/1) ... [2023-08-26 12:28:51,490 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:28:51" (1/1) ... [2023-08-26 12:28:51,491 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:28:51" (1/1) ... [2023-08-26 12:28:51,492 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:28:51" (1/1) ... [2023-08-26 12:28:51,494 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 12:28:51,495 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 12:28:51,495 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 12:28:51,495 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 12:28:51,495 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:28:51" (1/1) ... [2023-08-26 12:28:51,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 12:28:51,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 12:28:51,526 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 12:28:51,531 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 12:28:51,551 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 12:28:51,551 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2023-08-26 12:28:51,551 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2023-08-26 12:28:51,551 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 12:28:51,552 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-26 12:28:51,552 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 12:28:51,552 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 12:28:51,552 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2023-08-26 12:28:51,552 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2023-08-26 12:28:51,552 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 12:28:51,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 12:28:51,552 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 12:28:51,552 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 12:28:51,554 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 12:28:51,679 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 12:28:51,681 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 12:28:51,944 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 12:28:51,949 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 12:28:51,950 INFO L302 CfgBuilder]: Removed 24 assume(true) statements. [2023-08-26 12:28:51,951 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 12:28:51 BoogieIcfgContainer [2023-08-26 12:28:51,951 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 12:28:51,953 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 12:28:51,953 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 12:28:51,954 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 12:28:51,955 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 12:28:50" (1/3) ... [2023-08-26 12:28:51,955 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42cf41e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 12:28:51, skipping insertion in model container [2023-08-26 12:28:51,955 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:28:51" (2/3) ... [2023-08-26 12:28:51,955 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42cf41e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 12:28:51, skipping insertion in model container [2023-08-26 12:28:51,955 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 12:28:51" (3/3) ... [2023-08-26 12:28:51,956 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_03-munge_racing.i [2023-08-26 12:28:51,967 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 12:28:51,967 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-08-26 12:28:51,967 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 12:28:52,039 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-26 12:28:52,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 189 places, 218 transitions, 458 flow [2023-08-26 12:28:52,145 INFO L124 PetriNetUnfolderBase]: 61/410 cut-off events. [2023-08-26 12:28:52,145 INFO L125 PetriNetUnfolderBase]: For 8/10 co-relation queries the response was YES. [2023-08-26 12:28:52,152 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 12:28:52,152 INFO L82 GeneralOperation]: Start removeDead. Operand has 189 places, 218 transitions, 458 flow [2023-08-26 12:28:52,161 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 189 places, 218 transitions, 458 flow [2023-08-26 12:28:52,163 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 12:28:52,168 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 189 places, 218 transitions, 458 flow [2023-08-26 12:28:52,170 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 189 places, 218 transitions, 458 flow [2023-08-26 12:28:52,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 189 places, 218 transitions, 458 flow [2023-08-26 12:28:52,236 INFO L124 PetriNetUnfolderBase]: 61/410 cut-off events. [2023-08-26 12:28:52,237 INFO L125 PetriNetUnfolderBase]: For 8/10 co-relation queries the response was YES. [2023-08-26 12:28:52,241 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 12:28:52,250 INFO L119 LiptonReduction]: Number of co-enabled transitions 19952 [2023-08-26 12:28:55,604 INFO L134 LiptonReduction]: Checked pairs total: 37279 [2023-08-26 12:28:55,604 INFO L136 LiptonReduction]: Total number of compositions: 170 [2023-08-26 12:28:55,614 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 12:28:55,618 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;@199fe89f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 12:28:55,618 INFO L358 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2023-08-26 12:28:55,619 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 12:28:55,620 INFO L124 PetriNetUnfolderBase]: 0/3 cut-off events. [2023-08-26 12:28:55,620 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:28:55,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:28:55,620 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 12:28:55,620 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-08-26 12:28:55,631 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:28:55,631 INFO L85 PathProgramCache]: Analyzing trace with hash 28342, now seen corresponding path program 1 times [2023-08-26 12:28:55,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:28:55,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529263811] [2023-08-26 12:28:55,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:28:55,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:28:55,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:28:55,894 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 12:28:55,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:28:55,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529263811] [2023-08-26 12:28:55,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529263811] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:28:55,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:28:55,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:28:55,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062839709] [2023-08-26 12:28:55,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:28:55,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:28:55,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:28:55,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:28:55,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:28:55,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 388 [2023-08-26 12:28:55,930 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 12:28:55,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:28:55,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 388 [2023-08-26 12:28:55,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:28:56,681 INFO L124 PetriNetUnfolderBase]: 5554/10121 cut-off events. [2023-08-26 12:28:56,682 INFO L125 PetriNetUnfolderBase]: For 106/106 co-relation queries the response was YES. [2023-08-26 12:28:56,696 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 12:28:56,760 INFO L140 encePairwiseOnDemand]: 363/388 looper letters, 67 selfloop transitions, 2 changer transitions 0/84 dead transitions. [2023-08-26 12:28:56,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 84 transitions, 328 flow [2023-08-26 12:28:56,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:28:56,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:28:56,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 570 transitions. [2023-08-26 12:28:56,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4896907216494845 [2023-08-26 12:28:56,771 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 570 transitions. [2023-08-26 12:28:56,771 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 570 transitions. [2023-08-26 12:28:56,772 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:28:56,774 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 570 transitions. [2023-08-26 12:28:56,776 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 12:28:56,780 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 12:28:56,780 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 12:28:56,781 INFO L175 Difference]: Start difference. First operand has 68 places, 90 transitions, 202 flow. Second operand 3 states and 570 transitions. [2023-08-26 12:28:56,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 84 transitions, 328 flow [2023-08-26 12:28:56,785 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 12:28:56,786 INFO L231 Difference]: Finished difference. Result has 70 places, 68 transitions, 168 flow [2023-08-26 12:28:56,788 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 12:28:56,789 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 2 predicate places. [2023-08-26 12:28:56,790 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 68 transitions, 168 flow [2023-08-26 12:28:56,790 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 12:28:56,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:28:56,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 12:28:56,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 12:28:56,790 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-08-26 12:28:56,791 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:28:56,791 INFO L85 PathProgramCache]: Analyzing trace with hash 28340, now seen corresponding path program 1 times [2023-08-26 12:28:56,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:28:56,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424326922] [2023-08-26 12:28:56,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:28:56,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:28:56,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:28:56,825 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 12:28:56,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:28:56,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424326922] [2023-08-26 12:28:56,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424326922] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:28:56,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:28:56,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:28:56,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509722098] [2023-08-26 12:28:56,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:28:56,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:28:56,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:28:56,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:28:56,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:28:56,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 388 [2023-08-26 12:28:56,829 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 12:28:56,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:28:56,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 388 [2023-08-26 12:28:56,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:28:57,458 INFO L124 PetriNetUnfolderBase]: 5269/9316 cut-off events. [2023-08-26 12:28:57,458 INFO L125 PetriNetUnfolderBase]: For 133/133 co-relation queries the response was YES. [2023-08-26 12:28:57,468 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 12:28:57,500 INFO L140 encePairwiseOnDemand]: 384/388 looper letters, 75 selfloop transitions, 2 changer transitions 0/92 dead transitions. [2023-08-26 12:28:57,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 92 transitions, 370 flow [2023-08-26 12:28:57,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:28:57,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:28:57,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 559 transitions. [2023-08-26 12:28:57,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4802405498281787 [2023-08-26 12:28:57,503 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 559 transitions. [2023-08-26 12:28:57,503 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 559 transitions. [2023-08-26 12:28:57,504 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:28:57,504 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 559 transitions. [2023-08-26 12:28:57,505 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 12:28:57,508 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 12:28:57,509 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 12:28:57,509 INFO L175 Difference]: Start difference. First operand has 70 places, 68 transitions, 168 flow. Second operand 3 states and 559 transitions. [2023-08-26 12:28:57,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 92 transitions, 370 flow [2023-08-26 12:28:57,512 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 12:28:57,513 INFO L231 Difference]: Finished difference. Result has 68 places, 66 transitions, 164 flow [2023-08-26 12:28:57,513 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 12:28:57,514 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 0 predicate places. [2023-08-26 12:28:57,515 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 66 transitions, 164 flow [2023-08-26 12:28:57,515 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 12:28:57,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:28:57,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 12:28:57,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 12:28:57,518 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-08-26 12:28:57,520 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:28:57,520 INFO L85 PathProgramCache]: Analyzing trace with hash 844990010, now seen corresponding path program 1 times [2023-08-26 12:28:57,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:28:57,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61134049] [2023-08-26 12:28:57,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:28:57,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:28:57,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:28:57,629 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 12:28:57,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:28:57,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61134049] [2023-08-26 12:28:57,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61134049] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 12:28:57,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891950128] [2023-08-26 12:28:57,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:28:57,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:28:57,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 12:28:57,633 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 12:28:57,653 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 12:28:57,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:28:57,705 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-26 12:28:57,707 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 12:28:57,755 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 12:28:57,795 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 12:28:57,796 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 12:28:57,828 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 12:28:57,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891950128] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 12:28:57,828 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 12:28:57,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-08-26 12:28:57,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717812334] [2023-08-26 12:28:57,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 12:28:57,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 12:28:57,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:28:57,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 12:28:57,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-26 12:28:57,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 388 [2023-08-26 12:28:57,832 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 12:28:57,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:28:57,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 388 [2023-08-26 12:28:57,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:28:57,903 INFO L124 PetriNetUnfolderBase]: 31/94 cut-off events. [2023-08-26 12:28:57,903 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-26 12:28:57,904 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 12:28:57,904 INFO L140 encePairwiseOnDemand]: 384/388 looper letters, 31 selfloop transitions, 2 changer transitions 0/38 dead transitions. [2023-08-26 12:28:57,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 38 transitions, 151 flow [2023-08-26 12:28:57,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 12:28:57,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 12:28:57,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 659 transitions. [2023-08-26 12:28:57,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42461340206185566 [2023-08-26 12:28:57,906 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 659 transitions. [2023-08-26 12:28:57,907 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 659 transitions. [2023-08-26 12:28:57,907 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:28:57,907 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 659 transitions. [2023-08-26 12:28:57,908 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 12:28:57,910 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 12:28:57,911 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 12:28:57,911 INFO L175 Difference]: Start difference. First operand has 68 places, 66 transitions, 164 flow. Second operand 4 states and 659 transitions. [2023-08-26 12:28:57,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 38 transitions, 151 flow [2023-08-26 12:28:57,912 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 12:28:57,913 INFO L231 Difference]: Finished difference. Result has 30 places, 23 transitions, 56 flow [2023-08-26 12:28:57,913 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=56, PETRI_PLACES=30, PETRI_TRANSITIONS=23} [2023-08-26 12:28:57,914 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -38 predicate places. [2023-08-26 12:28:57,914 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 23 transitions, 56 flow [2023-08-26 12:28:57,914 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 12:28:57,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:28:57,915 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-26 12:28:57,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-26 12:28:58,120 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 12:28:58,120 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-08-26 12:28:58,121 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:28:58,121 INFO L85 PathProgramCache]: Analyzing trace with hash 424887185, now seen corresponding path program 1 times [2023-08-26 12:28:58,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:28:58,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140492327] [2023-08-26 12:28:58,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:28:58,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:28:58,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 12:28:58,132 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 12:28:58,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 12:28:58,161 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 12:28:58,162 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 12:28:58,162 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (13 of 14 remaining) [2023-08-26 12:28:58,163 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONASSERT (12 of 14 remaining) [2023-08-26 12:28:58,163 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 14 remaining) [2023-08-26 12:28:58,163 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 14 remaining) [2023-08-26 12:28:58,164 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 14 remaining) [2023-08-26 12:28:58,164 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 14 remaining) [2023-08-26 12:28:58,164 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 14 remaining) [2023-08-26 12:28:58,164 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 14 remaining) [2023-08-26 12:28:58,164 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 14 remaining) [2023-08-26 12:28:58,164 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 14 remaining) [2023-08-26 12:28:58,164 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 14 remaining) [2023-08-26 12:28:58,164 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr0ASSERT_VIOLATIONASSERT (2 of 14 remaining) [2023-08-26 12:28:58,164 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONASSERT (1 of 14 remaining) [2023-08-26 12:28:58,164 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr0ASSERT_VIOLATIONASSERT (0 of 14 remaining) [2023-08-26 12:28:58,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 12:28:58,165 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-26 12:28:58,166 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 12:28:58,166 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-26 12:28:58,196 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-26 12:28:58,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 285 places, 340 transitions, 728 flow [2023-08-26 12:28:58,309 INFO L124 PetriNetUnfolderBase]: 205/1208 cut-off events. [2023-08-26 12:28:58,309 INFO L125 PetriNetUnfolderBase]: For 72/78 co-relation queries the response was YES. [2023-08-26 12:28:58,326 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 7474 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 12:28:58,326 INFO L82 GeneralOperation]: Start removeDead. Operand has 285 places, 340 transitions, 728 flow [2023-08-26 12:28:58,335 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 285 places, 340 transitions, 728 flow [2023-08-26 12:28:58,335 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 12:28:58,335 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 285 places, 340 transitions, 728 flow [2023-08-26 12:28:58,335 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 285 places, 340 transitions, 728 flow [2023-08-26 12:28:58,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 285 places, 340 transitions, 728 flow [2023-08-26 12:28:58,464 INFO L124 PetriNetUnfolderBase]: 205/1208 cut-off events. [2023-08-26 12:28:58,464 INFO L125 PetriNetUnfolderBase]: For 72/78 co-relation queries the response was YES. [2023-08-26 12:28:58,482 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 7474 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 12:28:58,551 INFO L119 LiptonReduction]: Number of co-enabled transitions 69136 [2023-08-26 12:29:02,155 INFO L134 LiptonReduction]: Checked pairs total: 161653 [2023-08-26 12:29:02,155 INFO L136 LiptonReduction]: Total number of compositions: 249 [2023-08-26 12:29:02,156 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 12:29:02,157 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;@199fe89f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 12:29:02,157 INFO L358 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2023-08-26 12:29:02,158 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 12:29:02,158 INFO L124 PetriNetUnfolderBase]: 0/3 cut-off events. [2023-08-26 12:29:02,158 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:29:02,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:29:02,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 12:29:02,159 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 12:29:02,159 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:29:02,159 INFO L85 PathProgramCache]: Analyzing trace with hash 50991, now seen corresponding path program 1 times [2023-08-26 12:29:02,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:29:02,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700525849] [2023-08-26 12:29:02,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:29:02,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:29:02,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:29:02,181 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 12:29:02,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:29:02,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700525849] [2023-08-26 12:29:02,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700525849] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:29:02,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:29:02,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:29:02,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127146244] [2023-08-26 12:29:02,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:29:02,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:29:02,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:29:02,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:29:02,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:29:02,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 589 [2023-08-26 12:29:02,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 162 transitions, 372 flow. Second operand has 3 states, 3 states have (on average 250.66666666666666) internal successors, (752), 3 states have internal predecessors, (752), 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 12:29:02,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:29:02,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 589 [2023-08-26 12:29:02,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand