/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg true --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_10-ptrmunge_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-wip.dk.empire-owicki-6bf5761-m [2023-12-05 21:14:43,093 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-05 21:14:43,140 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-NoLbe.epf [2023-12-05 21:14:43,169 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-05 21:14:43,169 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-05 21:14:43,170 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-05 21:14:43,170 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-05 21:14:43,170 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-05 21:14:43,171 INFO L153 SettingsManager]: * Use SBE=true [2023-12-05 21:14:43,173 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-05 21:14:43,174 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-05 21:14:43,174 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-05 21:14:43,174 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-05 21:14:43,175 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-05 21:14:43,175 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-05 21:14:43,175 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-05 21:14:43,176 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-05 21:14:43,176 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-05 21:14:43,176 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-05 21:14:43,176 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-05 21:14:43,176 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-05 21:14:43,177 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-05 21:14:43,177 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-05 21:14:43,177 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-12-05 21:14:43,177 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-05 21:14:43,177 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-05 21:14:43,177 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-05 21:14:43,177 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-05 21:14:43,178 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-05 21:14:43,178 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-05 21:14:43,178 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-05 21:14:43,179 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-05 21:14:43,179 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-05 21:14:43,179 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-12-05 21:14:43,362 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-05 21:14:43,385 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-05 21:14:43,387 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-05 21:14:43,387 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-05 21:14:43,388 INFO L274 PluginConnector]: CDTParser initialized [2023-12-05 21:14:43,388 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_10-ptrmunge_racefree.i [2023-12-05 21:14:44,307 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-05 21:14:44,528 INFO L384 CDTParser]: Found 1 translation units. [2023-12-05 21:14:44,528 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_10-ptrmunge_racefree.i [2023-12-05 21:14:44,546 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8dfd52fc/27bf54b790c649fe94cdfed001251c0b/FLAG969794d7c [2023-12-05 21:14:44,871 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8dfd52fc/27bf54b790c649fe94cdfed001251c0b [2023-12-05 21:14:44,873 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-05 21:14:44,874 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-05 21:14:44,874 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-05 21:14:44,875 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-05 21:14:44,881 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-05 21:14:44,882 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 09:14:44" (1/1) ... [2023-12-05 21:14:44,883 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4fdf3434 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:14:44, skipping insertion in model container [2023-12-05 21:14:44,883 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 09:14:44" (1/1) ... [2023-12-05 21:14:44,918 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-05 21:14:45,169 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-05 21:14:45,180 INFO L202 MainTranslator]: Completed pre-run [2023-12-05 21:14:45,226 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-05 21:14:45,254 INFO L206 MainTranslator]: Completed translation [2023-12-05 21:14:45,256 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:14:45 WrapperNode [2023-12-05 21:14:45,256 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-05 21:14:45,257 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-05 21:14:45,257 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-05 21:14:45,257 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-05 21:14:45,261 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:14:45" (1/1) ... [2023-12-05 21:14:45,274 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:14:45" (1/1) ... [2023-12-05 21:14:45,295 INFO L138 Inliner]: procedures = 173, calls = 57, calls flagged for inlining = 6, calls inlined = 8, statements flattened = 253 [2023-12-05 21:14:45,295 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-05 21:14:45,296 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-05 21:14:45,296 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-05 21:14:45,296 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-05 21:14:45,306 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:14:45" (1/1) ... [2023-12-05 21:14:45,306 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:14:45" (1/1) ... [2023-12-05 21:14:45,310 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:14:45" (1/1) ... [2023-12-05 21:14:45,310 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:14:45" (1/1) ... [2023-12-05 21:14:45,315 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:14:45" (1/1) ... [2023-12-05 21:14:45,317 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:14:45" (1/1) ... [2023-12-05 21:14:45,319 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:14:45" (1/1) ... [2023-12-05 21:14:45,320 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:14:45" (1/1) ... [2023-12-05 21:14:45,322 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-05 21:14:45,323 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-05 21:14:45,323 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-05 21:14:45,323 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-05 21:14:45,323 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:14:45" (1/1) ... [2023-12-05 21:14:45,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-05 21:14:45,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:14:45,354 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) [2023-12-05 21:14:45,362 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 [2023-12-05 21:14:45,375 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-05 21:14:45,375 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2023-12-05 21:14:45,376 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2023-12-05 21:14:45,376 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-05 21:14:45,376 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-12-05 21:14:45,376 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-05 21:14:45,376 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-05 21:14:45,377 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2023-12-05 21:14:45,377 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2023-12-05 21:14:45,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-05 21:14:45,377 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-05 21:14:45,377 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-12-05 21:14:45,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-05 21:14:45,377 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-05 21:14:45,378 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-12-05 21:14:45,479 INFO L241 CfgBuilder]: Building ICFG [2023-12-05 21:14:45,480 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-05 21:14:45,787 INFO L282 CfgBuilder]: Performing block encoding [2023-12-05 21:14:45,877 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-05 21:14:45,878 INFO L309 CfgBuilder]: Removed 24 assume(true) statements. [2023-12-05 21:14:45,879 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 09:14:45 BoogieIcfgContainer [2023-12-05 21:14:45,879 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-05 21:14:45,881 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-05 21:14:45,881 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-05 21:14:45,883 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-05 21:14:45,883 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.12 09:14:44" (1/3) ... [2023-12-05 21:14:45,889 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43e0f063 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 09:14:45, skipping insertion in model container [2023-12-05 21:14:45,889 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:14:45" (2/3) ... [2023-12-05 21:14:45,889 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43e0f063 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 09:14:45, skipping insertion in model container [2023-12-05 21:14:45,889 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 09:14:45" (3/3) ... [2023-12-05 21:14:45,890 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_10-ptrmunge_racefree.i [2023-12-05 21:14:45,901 INFO L197 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-05 21:14:45,902 INFO L156 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2023-12-05 21:14:45,902 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-12-05 21:14:45,995 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-12-05 21:14:46,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 244 places, 273 transitions, 566 flow [2023-12-05 21:14:46,175 INFO L124 PetriNetUnfolderBase]: 61/493 cut-off events. [2023-12-05 21:14:46,175 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-12-05 21:14:46,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 510 conditions, 493 events. 61/493 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 2494 event pairs, 0 based on Foata normal form. 0/368 useless extension candidates. Maximal degree in co-relation 269. Up to 8 conditions per place. [2023-12-05 21:14:46,187 INFO L82 GeneralOperation]: Start removeDead. Operand has 244 places, 273 transitions, 566 flow [2023-12-05 21:14:46,197 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 244 places, 273 transitions, 566 flow [2023-12-05 21:14:46,208 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-05 21:14:46,215 INFO L362 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@581a4a92, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-05 21:14:46,215 INFO L363 AbstractCegarLoop]: Starting to check reachability of 50 error locations. [2023-12-05 21:14:46,222 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-05 21:14:46,222 INFO L124 PetriNetUnfolderBase]: 1/45 cut-off events. [2023-12-05 21:14:46,222 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 21:14:46,222 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:14:46,222 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:14:46,223 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-12-05 21:14:46,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:14:46,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1018407855, now seen corresponding path program 1 times [2023-12-05 21:14:46,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:14:46,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397104508] [2023-12-05 21:14:46,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:14:46,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:14:46,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:14:46,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:14:46,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:14:46,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397104508] [2023-12-05 21:14:46,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397104508] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:14:46,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:14:46,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:14:46,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570956249] [2023-12-05 21:14:46,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:14:46,505 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:14:46,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:14:46,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:14:46,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:14:46,533 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 273 [2023-12-05 21:14:46,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 273 transitions, 566 flow. Second operand has 3 states, 3 states have (on average 179.66666666666666) internal successors, (539), 3 states have internal predecessors, (539), 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) [2023-12-05 21:14:46,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:14:46,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 273 [2023-12-05 21:14:46,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:14:48,944 INFO L124 PetriNetUnfolderBase]: 7943/21128 cut-off events. [2023-12-05 21:14:48,944 INFO L125 PetriNetUnfolderBase]: For 258/258 co-relation queries the response was YES. [2023-12-05 21:14:48,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33561 conditions, 21128 events. 7943/21128 cut-off events. For 258/258 co-relation queries the response was YES. Maximal size of possible extension queue 1430. Compared 261462 event pairs, 4788 based on Foata normal form. 5265/22497 useless extension candidates. Maximal degree in co-relation 31971. Up to 7800 conditions per place. [2023-12-05 21:14:49,103 INFO L140 encePairwiseOnDemand]: 241/273 looper letters, 99 selfloop transitions, 2 changer transitions 0/273 dead transitions. [2023-12-05 21:14:49,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 273 transitions, 768 flow [2023-12-05 21:14:49,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:14:49,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:14:49,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 683 transitions. [2023-12-05 21:14:49,118 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.833943833943834 [2023-12-05 21:14:49,119 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 683 transitions. [2023-12-05 21:14:49,120 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 683 transitions. [2023-12-05 21:14:49,122 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:14:49,124 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 683 transitions. [2023-12-05 21:14:49,128 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 227.66666666666666) internal successors, (683), 3 states have internal predecessors, (683), 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) [2023-12-05 21:14:49,133 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 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) [2023-12-05 21:14:49,134 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 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) [2023-12-05 21:14:49,137 INFO L308 CegarLoopForPetriNet]: 244 programPoint places, -6 predicate places. [2023-12-05 21:14:49,137 INFO L500 AbstractCegarLoop]: Abstraction has has 238 places, 273 transitions, 768 flow [2023-12-05 21:14:49,137 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 179.66666666666666) internal successors, (539), 3 states have internal predecessors, (539), 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) [2023-12-05 21:14:49,137 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:14:49,138 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:14:49,138 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-05 21:14:49,138 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-12-05 21:14:49,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:14:49,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1018407854, now seen corresponding path program 1 times [2023-12-05 21:14:49,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:14:49,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727348716] [2023-12-05 21:14:49,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:14:49,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:14:49,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:14:49,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:14:49,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:14:49,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727348716] [2023-12-05 21:14:49,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727348716] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:14:49,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:14:49,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-05 21:14:49,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509796466] [2023-12-05 21:14:49,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:14:49,319 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-05 21:14:49,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:14:49,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-05 21:14:49,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-05 21:14:49,320 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 273 [2023-12-05 21:14:49,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 273 transitions, 768 flow. Second operand has 4 states, 4 states have (on average 175.0) internal successors, (700), 4 states have internal predecessors, (700), 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) [2023-12-05 21:14:49,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:14:49,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 273 [2023-12-05 21:14:49,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:14:52,185 INFO L124 PetriNetUnfolderBase]: 13352/32381 cut-off events. [2023-12-05 21:14:52,185 INFO L125 PetriNetUnfolderBase]: For 7649/8247 co-relation queries the response was YES. [2023-12-05 21:14:52,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66956 conditions, 32381 events. 13352/32381 cut-off events. For 7649/8247 co-relation queries the response was YES. Maximal size of possible extension queue 2541. Compared 405208 event pairs, 8966 based on Foata normal form. 0/30538 useless extension candidates. Maximal degree in co-relation 64979. Up to 12896 conditions per place. [2023-12-05 21:14:52,419 INFO L140 encePairwiseOnDemand]: 267/273 looper letters, 147 selfloop transitions, 4 changer transitions 0/329 dead transitions. [2023-12-05 21:14:52,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 329 transitions, 1262 flow [2023-12-05 21:14:52,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-05 21:14:52,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-12-05 21:14:52,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 815 transitions. [2023-12-05 21:14:52,422 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7463369963369964 [2023-12-05 21:14:52,422 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 815 transitions. [2023-12-05 21:14:52,422 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 815 transitions. [2023-12-05 21:14:52,422 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:14:52,422 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 815 transitions. [2023-12-05 21:14:52,424 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 203.75) internal successors, (815), 4 states have internal predecessors, (815), 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) [2023-12-05 21:14:52,425 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 273.0) internal successors, (1365), 5 states have internal predecessors, (1365), 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) [2023-12-05 21:14:52,426 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 273.0) internal successors, (1365), 5 states have internal predecessors, (1365), 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) [2023-12-05 21:14:52,426 INFO L308 CegarLoopForPetriNet]: 244 programPoint places, -3 predicate places. [2023-12-05 21:14:52,426 INFO L500 AbstractCegarLoop]: Abstraction has has 241 places, 329 transitions, 1262 flow [2023-12-05 21:14:52,427 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 175.0) internal successors, (700), 4 states have internal predecessors, (700), 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) [2023-12-05 21:14:52,427 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:14:52,427 INFO L233 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:14:52,427 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-05 21:14:52,427 INFO L425 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-12-05 21:14:52,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:14:52,428 INFO L85 PathProgramCache]: Analyzing trace with hash -2010046234, now seen corresponding path program 1 times [2023-12-05 21:14:52,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:14:52,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488066385] [2023-12-05 21:14:52,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:14:52,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:14:52,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:14:52,596 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:14:52,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:14:52,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488066385] [2023-12-05 21:14:52,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488066385] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-05 21:14:52,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521863509] [2023-12-05 21:14:52,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:14:52,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:14:52,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:14:52,600 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) [2023-12-05 21:14:52,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-05 21:14:52,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:14:52,692 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-05 21:14:52,696 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-05 21:14:52,734 INFO L378 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 8 treesize of output 1 [2023-12-05 21:14:52,842 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:14:52,843 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-05 21:14:52,963 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:14:52,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521863509] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-05 21:14:52,963 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-05 21:14:52,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2023-12-05 21:14:52,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881889003] [2023-12-05 21:14:52,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-05 21:14:52,968 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-05 21:14:52,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:14:52,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-05 21:14:52,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-12-05 21:14:52,971 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 273 [2023-12-05 21:14:52,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 329 transitions, 1262 flow. Second operand has 14 states, 14 states have (on average 173.71428571428572) internal successors, (2432), 14 states have internal predecessors, (2432), 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) [2023-12-05 21:14:52,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:14:52,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 273 [2023-12-05 21:14:52,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:14:53,275 INFO L124 PetriNetUnfolderBase]: 98/446 cut-off events. [2023-12-05 21:14:53,276 INFO L125 PetriNetUnfolderBase]: For 301/361 co-relation queries the response was YES. [2023-12-05 21:14:53,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1011 conditions, 446 events. 98/446 cut-off events. For 301/361 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 2332 event pairs, 5 based on Foata normal form. 10/437 useless extension candidates. Maximal degree in co-relation 1005. Up to 135 conditions per place. [2023-12-05 21:14:53,278 INFO L140 encePairwiseOnDemand]: 266/273 looper letters, 85 selfloop transitions, 5 changer transitions 0/172 dead transitions. [2023-12-05 21:14:53,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 172 transitions, 846 flow [2023-12-05 21:14:53,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-05 21:14:53,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-12-05 21:14:53,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1289 transitions. [2023-12-05 21:14:53,280 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.674515960230246 [2023-12-05 21:14:53,280 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1289 transitions. [2023-12-05 21:14:53,280 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1289 transitions. [2023-12-05 21:14:53,281 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:14:53,281 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1289 transitions. [2023-12-05 21:14:53,283 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 184.14285714285714) internal successors, (1289), 7 states have internal predecessors, (1289), 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) [2023-12-05 21:14:53,286 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 273.0) internal successors, (2184), 8 states have internal predecessors, (2184), 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) [2023-12-05 21:14:53,286 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 273.0) internal successors, (2184), 8 states have internal predecessors, (2184), 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) [2023-12-05 21:14:53,287 INFO L308 CegarLoopForPetriNet]: 244 programPoint places, -114 predicate places. [2023-12-05 21:14:53,288 INFO L500 AbstractCegarLoop]: Abstraction has has 130 places, 172 transitions, 846 flow [2023-12-05 21:14:53,289 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 173.71428571428572) internal successors, (2432), 14 states have internal predecessors, (2432), 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) [2023-12-05 21:14:53,289 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:14:53,289 INFO L233 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:14:53,309 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-05 21:14:53,494 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:14:53,495 INFO L425 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-12-05 21:14:53,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:14:53,496 INFO L85 PathProgramCache]: Analyzing trace with hash 2113077030, now seen corresponding path program 1 times [2023-12-05 21:14:53,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:14:53,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160243962] [2023-12-05 21:14:53,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:14:53,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:14:53,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-05 21:14:53,511 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-05 21:14:53,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-05 21:14:53,532 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-12-05 21:14:53,532 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-12-05 21:14:53,533 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (49 of 50 remaining) [2023-12-05 21:14:53,534 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 50 remaining) [2023-12-05 21:14:53,534 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 50 remaining) [2023-12-05 21:14:53,534 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 50 remaining) [2023-12-05 21:14:53,535 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 50 remaining) [2023-12-05 21:14:53,535 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 50 remaining) [2023-12-05 21:14:53,535 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 50 remaining) [2023-12-05 21:14:53,535 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 50 remaining) [2023-12-05 21:14:53,535 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 50 remaining) [2023-12-05 21:14:53,535 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 50 remaining) [2023-12-05 21:14:53,535 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 50 remaining) [2023-12-05 21:14:53,535 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 50 remaining) [2023-12-05 21:14:53,535 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 50 remaining) [2023-12-05 21:14:53,535 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 50 remaining) [2023-12-05 21:14:53,535 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 50 remaining) [2023-12-05 21:14:53,536 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 50 remaining) [2023-12-05 21:14:53,536 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 50 remaining) [2023-12-05 21:14:53,536 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 50 remaining) [2023-12-05 21:14:53,536 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 50 remaining) [2023-12-05 21:14:53,536 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (30 of 50 remaining) [2023-12-05 21:14:53,536 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 50 remaining) [2023-12-05 21:14:53,536 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 50 remaining) [2023-12-05 21:14:53,536 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 50 remaining) [2023-12-05 21:14:53,536 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 50 remaining) [2023-12-05 21:14:53,536 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 50 remaining) [2023-12-05 21:14:53,536 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 50 remaining) [2023-12-05 21:14:53,537 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 50 remaining) [2023-12-05 21:14:53,537 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 50 remaining) [2023-12-05 21:14:53,537 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 50 remaining) [2023-12-05 21:14:53,537 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 50 remaining) [2023-12-05 21:14:53,537 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 50 remaining) [2023-12-05 21:14:53,537 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 50 remaining) [2023-12-05 21:14:53,537 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 50 remaining) [2023-12-05 21:14:53,537 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 50 remaining) [2023-12-05 21:14:53,537 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 50 remaining) [2023-12-05 21:14:53,537 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 50 remaining) [2023-12-05 21:14:53,537 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 50 remaining) [2023-12-05 21:14:53,538 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 50 remaining) [2023-12-05 21:14:53,538 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 50 remaining) [2023-12-05 21:14:53,538 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 50 remaining) [2023-12-05 21:14:53,538 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 50 remaining) [2023-12-05 21:14:53,538 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 50 remaining) [2023-12-05 21:14:53,538 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 50 remaining) [2023-12-05 21:14:53,538 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 50 remaining) [2023-12-05 21:14:53,538 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 50 remaining) [2023-12-05 21:14:53,538 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 50 remaining) [2023-12-05 21:14:53,538 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 50 remaining) [2023-12-05 21:14:53,538 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 50 remaining) [2023-12-05 21:14:53,539 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 50 remaining) [2023-12-05 21:14:53,539 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 50 remaining) [2023-12-05 21:14:53,539 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-05 21:14:53,539 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-12-05 21:14:53,541 WARN L227 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-05 21:14:53,541 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-12-05 21:14:53,592 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-12-05 21:14:53,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 390 places, 445 transitions, 934 flow [2023-12-05 21:14:53,763 INFO L124 PetriNetUnfolderBase]: 205/1428 cut-off events. [2023-12-05 21:14:53,763 INFO L125 PetriNetUnfolderBase]: For 72/78 co-relation queries the response was YES. [2023-12-05 21:14:53,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1517 conditions, 1428 events. 205/1428 cut-off events. For 72/78 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 9786 event pairs, 2 based on Foata normal form. 0/1068 useless extension candidates. Maximal degree in co-relation 875. Up to 32 conditions per place. [2023-12-05 21:14:53,800 INFO L82 GeneralOperation]: Start removeDead. Operand has 390 places, 445 transitions, 934 flow [2023-12-05 21:14:53,817 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 390 places, 445 transitions, 934 flow [2023-12-05 21:14:53,818 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-05 21:14:53,818 INFO L362 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@581a4a92, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-05 21:14:53,818 INFO L363 AbstractCegarLoop]: Starting to check reachability of 70 error locations. [2023-12-05 21:14:53,820 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-05 21:14:53,820 INFO L124 PetriNetUnfolderBase]: 1/45 cut-off events. [2023-12-05 21:14:53,820 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 21:14:53,820 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:14:53,820 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:14:53,820 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-12-05 21:14:53,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:14:53,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1047412084, now seen corresponding path program 1 times [2023-12-05 21:14:53,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:14:53,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054462061] [2023-12-05 21:14:53,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:14:53,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:14:53,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:14:53,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:14:53,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:14:53,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054462061] [2023-12-05 21:14:53,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054462061] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:14:53,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:14:53,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:14:53,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397733381] [2023-12-05 21:14:53,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:14:53,851 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:14:53,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:14:53,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:14:53,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:14:53,853 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 280 out of 445 [2023-12-05 21:14:53,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 445 transitions, 934 flow. Second operand has 3 states, 3 states have (on average 283.6666666666667) internal successors, (851), 3 states have internal predecessors, (851), 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) [2023-12-05 21:14:53,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:14:53,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 280 of 445 [2023-12-05 21:14:53,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand