/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/pthread-ext/08_rand_cas.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-wip.dk.empire-owicki-6bf5761-m [2023-12-05 21:01:28,473 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-05 21:01:28,537 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 21:01:28,551 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-05 21:01:28,552 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-05 21:01:28,552 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-05 21:01:28,553 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-05 21:01:28,553 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-05 21:01:28,553 INFO L153 SettingsManager]: * Use SBE=true [2023-12-05 21:01:28,553 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-05 21:01:28,554 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-05 21:01:28,554 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-05 21:01:28,554 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-05 21:01:28,554 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-05 21:01:28,555 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-05 21:01:28,555 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-05 21:01:28,555 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-05 21:01:28,555 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-05 21:01:28,555 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-05 21:01:28,556 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-05 21:01:28,556 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-05 21:01:28,556 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-05 21:01:28,556 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-05 21:01:28,557 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-12-05 21:01:28,557 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-05 21:01:28,557 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-05 21:01:28,557 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-05 21:01:28,557 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-05 21:01:28,558 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-05 21:01:28,558 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-05 21:01:28,558 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-05 21:01:28,558 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-05 21:01:28,558 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-05 21:01:28,558 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-12-05 21:01:28,682 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-05 21:01:28,712 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-05 21:01:28,714 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-05 21:01:28,715 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-05 21:01:28,715 INFO L274 PluginConnector]: CDTParser initialized [2023-12-05 21:01:28,716 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/08_rand_cas.i [2023-12-05 21:01:29,787 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-05 21:01:30,001 INFO L384 CDTParser]: Found 1 translation units. [2023-12-05 21:01:30,002 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/08_rand_cas.i [2023-12-05 21:01:30,011 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6375c0651/5b7bd6b860634b179ca64e1cd8c04205/FLAG4ec2de069 [2023-12-05 21:01:30,021 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6375c0651/5b7bd6b860634b179ca64e1cd8c04205 [2023-12-05 21:01:30,023 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-05 21:01:30,024 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-05 21:01:30,024 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-05 21:01:30,024 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-05 21:01:30,028 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-05 21:01:30,028 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 09:01:30" (1/1) ... [2023-12-05 21:01:30,029 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fd7064e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:01:30, skipping insertion in model container [2023-12-05 21:01:30,029 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 09:01:30" (1/1) ... [2023-12-05 21:01:30,075 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-05 21:01:30,282 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-05 21:01:30,292 INFO L202 MainTranslator]: Completed pre-run [2023-12-05 21:01:30,326 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-05 21:01:30,354 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-12-05 21:01:30,354 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-12-05 21:01:30,359 INFO L206 MainTranslator]: Completed translation [2023-12-05 21:01:30,359 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:01:30 WrapperNode [2023-12-05 21:01:30,359 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-05 21:01:30,360 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-05 21:01:30,360 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-05 21:01:30,360 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-05 21:01:30,367 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:01:30" (1/1) ... [2023-12-05 21:01:30,379 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:01:30" (1/1) ... [2023-12-05 21:01:30,397 INFO L138 Inliner]: procedures = 178, calls = 41, calls flagged for inlining = 16, calls inlined = 17, statements flattened = 155 [2023-12-05 21:01:30,397 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-05 21:01:30,398 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-05 21:01:30,398 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-05 21:01:30,398 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-05 21:01:30,404 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:01:30" (1/1) ... [2023-12-05 21:01:30,404 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:01:30" (1/1) ... [2023-12-05 21:01:30,407 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:01:30" (1/1) ... [2023-12-05 21:01:30,407 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:01:30" (1/1) ... [2023-12-05 21:01:30,412 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:01:30" (1/1) ... [2023-12-05 21:01:30,415 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:01:30" (1/1) ... [2023-12-05 21:01:30,416 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:01:30" (1/1) ... [2023-12-05 21:01:30,417 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:01:30" (1/1) ... [2023-12-05 21:01:30,419 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-05 21:01:30,420 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-05 21:01:30,420 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-05 21:01:30,420 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-05 21:01:30,420 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:01:30" (1/1) ... [2023-12-05 21:01:30,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-05 21:01:30,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:01:30,443 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 21:01:30,459 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 21:01:30,478 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-05 21:01:30,479 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-12-05 21:01:30,479 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-12-05 21:01:30,479 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-05 21:01:30,479 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-12-05 21:01:30,479 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-05 21:01:30,479 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-05 21:01:30,480 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-05 21:01:30,480 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-05 21:01:30,480 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-12-05 21:01:30,480 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-05 21:01:30,480 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-05 21:01:30,481 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 21:01:30,580 INFO L241 CfgBuilder]: Building ICFG [2023-12-05 21:01:30,582 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-05 21:01:30,852 INFO L282 CfgBuilder]: Performing block encoding [2023-12-05 21:01:30,945 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-05 21:01:30,945 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-12-05 21:01:30,947 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 09:01:30 BoogieIcfgContainer [2023-12-05 21:01:30,947 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-05 21:01:30,949 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-05 21:01:30,949 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-05 21:01:30,951 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-05 21:01:30,952 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.12 09:01:30" (1/3) ... [2023-12-05 21:01:30,952 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f062355 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 09:01:30, skipping insertion in model container [2023-12-05 21:01:30,953 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:01:30" (2/3) ... [2023-12-05 21:01:30,953 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f062355 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 09:01:30, skipping insertion in model container [2023-12-05 21:01:30,953 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 09:01:30" (3/3) ... [2023-12-05 21:01:30,954 INFO L112 eAbstractionObserver]: Analyzing ICFG 08_rand_cas.i [2023-12-05 21:01:30,980 INFO L197 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-05 21:01:30,980 INFO L156 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2023-12-05 21:01:30,980 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-12-05 21:01:31,070 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-12-05 21:01:31,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 138 places, 151 transitions, 306 flow [2023-12-05 21:01:31,158 INFO L124 PetriNetUnfolderBase]: 17/164 cut-off events. [2023-12-05 21:01:31,158 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 21:01:31,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168 conditions, 164 events. 17/164 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 341 event pairs, 0 based on Foata normal form. 0/125 useless extension candidates. Maximal degree in co-relation 135. Up to 4 conditions per place. [2023-12-05 21:01:31,167 INFO L82 GeneralOperation]: Start removeDead. Operand has 138 places, 151 transitions, 306 flow [2023-12-05 21:01:31,173 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 138 places, 151 transitions, 306 flow [2023-12-05 21:01:31,184 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-05 21:01:31,191 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;@3c4a1831, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-05 21:01:31,191 INFO L363 AbstractCegarLoop]: Starting to check reachability of 35 error locations. [2023-12-05 21:01:31,197 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-05 21:01:31,197 INFO L124 PetriNetUnfolderBase]: 1/22 cut-off events. [2023-12-05 21:01:31,197 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 21:01:31,197 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:01:31,198 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:01:31,198 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-12-05 21:01:31,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:01:31,202 INFO L85 PathProgramCache]: Analyzing trace with hash 125640609, now seen corresponding path program 1 times [2023-12-05 21:01:31,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:01:31,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139980811] [2023-12-05 21:01:31,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:01:31,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:01:31,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:01:31,386 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 21:01:31,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:01:31,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139980811] [2023-12-05 21:01:31,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139980811] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:01:31,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:01:31,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:01:31,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983550442] [2023-12-05 21:01:31,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:01:31,395 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:01:31,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:01:31,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:01:31,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:01:31,427 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 151 [2023-12-05 21:01:31,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 151 transitions, 306 flow. Second operand has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 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 21:01:31,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:01:31,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 151 [2023-12-05 21:01:31,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:01:31,515 INFO L124 PetriNetUnfolderBase]: 52/372 cut-off events. [2023-12-05 21:01:31,516 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 21:01:31,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 499 conditions, 372 events. 52/372 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1680 event pairs, 42 based on Foata normal form. 53/342 useless extension candidates. Maximal degree in co-relation 463. Up to 112 conditions per place. [2023-12-05 21:01:31,518 INFO L140 encePairwiseOnDemand]: 132/151 looper letters, 31 selfloop transitions, 3 changer transitions 0/123 dead transitions. [2023-12-05 21:01:31,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 123 transitions, 318 flow [2023-12-05 21:01:31,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:01:31,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:01:31,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 348 transitions. [2023-12-05 21:01:31,528 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7682119205298014 [2023-12-05 21:01:31,528 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 348 transitions. [2023-12-05 21:01:31,529 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 348 transitions. [2023-12-05 21:01:31,530 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:01:31,531 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 348 transitions. [2023-12-05 21:01:31,533 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 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 21:01:31,536 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 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 21:01:31,536 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 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 21:01:31,539 INFO L308 CegarLoopForPetriNet]: 138 programPoint places, -16 predicate places. [2023-12-05 21:01:31,540 INFO L500 AbstractCegarLoop]: Abstraction has has 122 places, 123 transitions, 318 flow [2023-12-05 21:01:31,540 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 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 21:01:31,540 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:01:31,540 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:01:31,540 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-05 21:01:31,541 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-12-05 21:01:31,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:01:31,541 INFO L85 PathProgramCache]: Analyzing trace with hash 125640610, now seen corresponding path program 1 times [2023-12-05 21:01:31,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:01:31,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3488044] [2023-12-05 21:01:31,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:01:31,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:01:31,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:01:31,637 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 21:01:31,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:01:31,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3488044] [2023-12-05 21:01:31,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3488044] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:01:31,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:01:31,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:01:31,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326793132] [2023-12-05 21:01:31,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:01:31,639 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:01:31,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:01:31,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:01:31,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:01:31,640 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 151 [2023-12-05 21:01:31,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 123 transitions, 318 flow. Second operand has 3 states, 3 states have (on average 102.0) internal successors, (306), 3 states have internal predecessors, (306), 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 21:01:31,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:01:31,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 151 [2023-12-05 21:01:31,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:01:31,697 INFO L124 PetriNetUnfolderBase]: 29/251 cut-off events. [2023-12-05 21:01:31,698 INFO L125 PetriNetUnfolderBase]: For 26/28 co-relation queries the response was YES. [2023-12-05 21:01:31,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 410 conditions, 251 events. 29/251 cut-off events. For 26/28 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 880 event pairs, 23 based on Foata normal form. 0/215 useless extension candidates. Maximal degree in co-relation 368. Up to 71 conditions per place. [2023-12-05 21:01:31,699 INFO L140 encePairwiseOnDemand]: 149/151 looper letters, 29 selfloop transitions, 1 changer transitions 0/121 dead transitions. [2023-12-05 21:01:31,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 121 transitions, 370 flow [2023-12-05 21:01:31,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:01:31,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:01:31,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 330 transitions. [2023-12-05 21:01:31,702 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7284768211920529 [2023-12-05 21:01:31,702 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 330 transitions. [2023-12-05 21:01:31,702 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 330 transitions. [2023-12-05 21:01:31,703 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:01:31,703 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 330 transitions. [2023-12-05 21:01:31,704 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 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 21:01:31,708 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 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 21:01:31,708 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 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 21:01:31,709 INFO L308 CegarLoopForPetriNet]: 138 programPoint places, -15 predicate places. [2023-12-05 21:01:31,709 INFO L500 AbstractCegarLoop]: Abstraction has has 123 places, 121 transitions, 370 flow [2023-12-05 21:01:31,709 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 102.0) internal successors, (306), 3 states have internal predecessors, (306), 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 21:01:31,709 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:01:31,709 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] [2023-12-05 21:01:31,710 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-05 21:01:31,710 INFO L425 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-12-05 21:01:31,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:01:31,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1975057699, now seen corresponding path program 1 times [2023-12-05 21:01:31,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:01:31,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080459163] [2023-12-05 21:01:31,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:01:31,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:01:31,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-05 21:01:31,739 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-05 21:01:31,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-05 21:01:31,759 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-12-05 21:01:31,760 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-12-05 21:01:31,760 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (34 of 35 remaining) [2023-12-05 21:01:31,761 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 35 remaining) [2023-12-05 21:01:31,762 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 35 remaining) [2023-12-05 21:01:31,762 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 35 remaining) [2023-12-05 21:01:31,762 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 35 remaining) [2023-12-05 21:01:31,762 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 35 remaining) [2023-12-05 21:01:31,762 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 35 remaining) [2023-12-05 21:01:31,763 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 35 remaining) [2023-12-05 21:01:31,763 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 35 remaining) [2023-12-05 21:01:31,763 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 35 remaining) [2023-12-05 21:01:31,763 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 35 remaining) [2023-12-05 21:01:31,763 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 35 remaining) [2023-12-05 21:01:31,763 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 35 remaining) [2023-12-05 21:01:31,763 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 35 remaining) [2023-12-05 21:01:31,764 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 35 remaining) [2023-12-05 21:01:31,764 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 35 remaining) [2023-12-05 21:01:31,764 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 35 remaining) [2023-12-05 21:01:31,764 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 35 remaining) [2023-12-05 21:01:31,764 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 35 remaining) [2023-12-05 21:01:31,764 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 35 remaining) [2023-12-05 21:01:31,765 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 35 remaining) [2023-12-05 21:01:31,765 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 35 remaining) [2023-12-05 21:01:31,765 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 35 remaining) [2023-12-05 21:01:31,765 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 35 remaining) [2023-12-05 21:01:31,765 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 35 remaining) [2023-12-05 21:01:31,765 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 35 remaining) [2023-12-05 21:01:31,765 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 35 remaining) [2023-12-05 21:01:31,766 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 35 remaining) [2023-12-05 21:01:31,766 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 35 remaining) [2023-12-05 21:01:31,766 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 35 remaining) [2023-12-05 21:01:31,766 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 35 remaining) [2023-12-05 21:01:31,766 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 35 remaining) [2023-12-05 21:01:31,766 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 35 remaining) [2023-12-05 21:01:31,766 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 35 remaining) [2023-12-05 21:01:31,766 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 35 remaining) [2023-12-05 21:01:31,767 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-05 21:01:31,767 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-12-05 21:01:31,768 WARN L227 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-05 21:01:31,769 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-12-05 21:01:31,841 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-12-05 21:01:31,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 246 places, 272 transitions, 554 flow [2023-12-05 21:01:31,872 INFO L124 PetriNetUnfolderBase]: 33/300 cut-off events. [2023-12-05 21:01:31,873 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-12-05 21:01:31,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 308 conditions, 300 events. 33/300 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1054 event pairs, 0 based on Foata normal form. 0/226 useless extension candidates. Maximal degree in co-relation 255. Up to 6 conditions per place. [2023-12-05 21:01:31,876 INFO L82 GeneralOperation]: Start removeDead. Operand has 246 places, 272 transitions, 554 flow [2023-12-05 21:01:31,880 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 246 places, 272 transitions, 554 flow [2023-12-05 21:01:31,881 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-05 21:01:31,881 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;@3c4a1831, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-05 21:01:31,881 INFO L363 AbstractCegarLoop]: Starting to check reachability of 51 error locations. [2023-12-05 21:01:31,883 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-05 21:01:31,883 INFO L124 PetriNetUnfolderBase]: 1/22 cut-off events. [2023-12-05 21:01:31,883 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 21:01:31,883 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:01:31,883 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:01:31,883 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-12-05 21:01:31,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:01:31,884 INFO L85 PathProgramCache]: Analyzing trace with hash 200036769, now seen corresponding path program 1 times [2023-12-05 21:01:31,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:01:31,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810313157] [2023-12-05 21:01:31,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:01:31,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:01:31,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:01:31,915 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 21:01:31,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:01:31,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810313157] [2023-12-05 21:01:31,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810313157] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:01:31,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:01:31,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:01:31,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225692147] [2023-12-05 21:01:31,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:01:31,916 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:01:31,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:01:31,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:01:31,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:01:31,917 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 272 [2023-12-05 21:01:31,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 272 transitions, 554 flow. Second operand has 3 states, 3 states have (on average 182.33333333333334) internal successors, (547), 3 states have internal predecessors, (547), 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 21:01:31,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:01:31,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 272 [2023-12-05 21:01:31,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:01:33,130 INFO L124 PetriNetUnfolderBase]: 3102/11497 cut-off events. [2023-12-05 21:01:33,131 INFO L125 PetriNetUnfolderBase]: For 131/131 co-relation queries the response was YES. [2023-12-05 21:01:33,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16282 conditions, 11497 events. 3102/11497 cut-off events. For 131/131 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 130374 event pairs, 2438 based on Foata normal form. 2044/10281 useless extension candidates. Maximal degree in co-relation 3801. Up to 4270 conditions per place. [2023-12-05 21:01:33,198 INFO L140 encePairwiseOnDemand]: 239/272 looper letters, 98 selfloop transitions, 4 changer transitions 0/266 dead transitions. [2023-12-05 21:01:33,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 266 transitions, 751 flow [2023-12-05 21:01:33,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:01:33,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:01:33,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 699 transitions. [2023-12-05 21:01:33,200 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.8566176470588235 [2023-12-05 21:01:33,201 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 699 transitions. [2023-12-05 21:01:33,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 699 transitions. [2023-12-05 21:01:33,201 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:01:33,201 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 699 transitions. [2023-12-05 21:01:33,202 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 233.0) internal successors, (699), 3 states have internal predecessors, (699), 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 21:01:33,204 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 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 21:01:33,204 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 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 21:01:33,205 INFO L308 CegarLoopForPetriNet]: 246 programPoint places, -28 predicate places. [2023-12-05 21:01:33,205 INFO L500 AbstractCegarLoop]: Abstraction has has 218 places, 266 transitions, 751 flow [2023-12-05 21:01:33,206 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 182.33333333333334) internal successors, (547), 3 states have internal predecessors, (547), 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 21:01:33,206 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:01:33,206 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:01:33,206 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-05 21:01:33,206 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-12-05 21:01:33,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:01:33,207 INFO L85 PathProgramCache]: Analyzing trace with hash 200036770, now seen corresponding path program 1 times [2023-12-05 21:01:33,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:01:33,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630722727] [2023-12-05 21:01:33,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:01:33,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:01:33,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:01:33,291 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 21:01:33,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:01:33,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630722727] [2023-12-05 21:01:33,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630722727] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:01:33,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:01:33,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:01:33,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904801372] [2023-12-05 21:01:33,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:01:33,292 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:01:33,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:01:33,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:01:33,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:01:33,293 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 272 [2023-12-05 21:01:33,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 266 transitions, 751 flow. Second operand has 3 states, 3 states have (on average 185.0) internal successors, (555), 3 states have internal predecessors, (555), 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 21:01:33,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:01:33,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 272 [2023-12-05 21:01:33,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:01:34,131 INFO L124 PetriNetUnfolderBase]: 2188/8226 cut-off events. [2023-12-05 21:01:34,132 INFO L125 PetriNetUnfolderBase]: For 984/1450 co-relation queries the response was YES. [2023-12-05 21:01:34,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14765 conditions, 8226 events. 2188/8226 cut-off events. For 984/1450 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 87609 event pairs, 1734 based on Foata normal form. 0/6435 useless extension candidates. Maximal degree in co-relation 3568. Up to 3166 conditions per place. [2023-12-05 21:01:34,171 INFO L140 encePairwiseOnDemand]: 270/272 looper letters, 90 selfloop transitions, 1 changer transitions 0/264 dead transitions. [2023-12-05 21:01:34,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 264 transitions, 925 flow [2023-12-05 21:01:34,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:01:34,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:01:34,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 601 transitions. [2023-12-05 21:01:34,174 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7365196078431373 [2023-12-05 21:01:34,176 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 601 transitions. [2023-12-05 21:01:34,176 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 601 transitions. [2023-12-05 21:01:34,176 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:01:34,176 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 601 transitions. [2023-12-05 21:01:34,177 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 200.33333333333334) internal successors, (601), 3 states have internal predecessors, (601), 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 21:01:34,179 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 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 21:01:34,180 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 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 21:01:34,181 INFO L308 CegarLoopForPetriNet]: 246 programPoint places, -27 predicate places. [2023-12-05 21:01:34,184 INFO L500 AbstractCegarLoop]: Abstraction has has 219 places, 264 transitions, 925 flow [2023-12-05 21:01:34,185 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 185.0) internal successors, (555), 3 states have internal predecessors, (555), 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 21:01:34,186 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:01:34,186 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] [2023-12-05 21:01:34,186 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-05 21:01:34,186 INFO L425 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-12-05 21:01:34,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:01:34,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1533179312, now seen corresponding path program 1 times [2023-12-05 21:01:34,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:01:34,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72259311] [2023-12-05 21:01:34,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:01:34,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:01:34,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:01:34,360 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 21:01:34,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:01:34,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72259311] [2023-12-05 21:01:34,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72259311] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:01:34,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:01:34,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-05 21:01:34,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027391787] [2023-12-05 21:01:34,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:01:34,361 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-05 21:01:34,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:01:34,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-05 21:01:34,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-12-05 21:01:34,362 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 272 [2023-12-05 21:01:34,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 264 transitions, 925 flow. Second operand has 6 states, 6 states have (on average 178.0) internal successors, (1068), 6 states have internal predecessors, (1068), 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 21:01:34,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:01:34,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 272 [2023-12-05 21:01:34,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:01:35,128 INFO L124 PetriNetUnfolderBase]: 1651/6960 cut-off events. [2023-12-05 21:01:35,129 INFO L125 PetriNetUnfolderBase]: For 2154/3150 co-relation queries the response was YES. [2023-12-05 21:01:35,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14694 conditions, 6960 events. 1651/6960 cut-off events. For 2154/3150 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 72883 event pairs, 1166 based on Foata normal form. 79/5686 useless extension candidates. Maximal degree in co-relation 4111. Up to 2505 conditions per place. [2023-12-05 21:01:35,163 INFO L140 encePairwiseOnDemand]: 244/272 looper letters, 163 selfloop transitions, 40 changer transitions 0/363 dead transitions. [2023-12-05 21:01:35,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 363 transitions, 1902 flow [2023-12-05 21:01:35,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-05 21:01:35,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-12-05 21:01:35,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1022 transitions. [2023-12-05 21:01:35,165 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7514705882352941 [2023-12-05 21:01:35,165 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1022 transitions. [2023-12-05 21:01:35,165 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1022 transitions. [2023-12-05 21:01:35,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:01:35,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1022 transitions. [2023-12-05 21:01:35,167 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 204.4) internal successors, (1022), 5 states have internal predecessors, (1022), 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 21:01:35,170 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 272.0) internal successors, (1632), 6 states have internal predecessors, (1632), 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 21:01:35,170 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 272.0) internal successors, (1632), 6 states have internal predecessors, (1632), 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 21:01:35,171 INFO L308 CegarLoopForPetriNet]: 246 programPoint places, -23 predicate places. [2023-12-05 21:01:35,171 INFO L500 AbstractCegarLoop]: Abstraction has has 223 places, 363 transitions, 1902 flow [2023-12-05 21:01:35,172 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 178.0) internal successors, (1068), 6 states have internal predecessors, (1068), 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 21:01:35,172 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:01:35,172 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] [2023-12-05 21:01:35,172 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-05 21:01:35,172 INFO L425 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-12-05 21:01:35,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:01:35,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1533179311, now seen corresponding path program 1 times [2023-12-05 21:01:35,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:01:35,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081804258] [2023-12-05 21:01:35,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:01:35,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:01:35,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:01:35,247 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 21:01:35,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:01:35,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081804258] [2023-12-05 21:01:35,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081804258] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:01:35,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:01:35,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-05 21:01:35,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180347804] [2023-12-05 21:01:35,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:01:35,248 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-05 21:01:35,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:01:35,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-05 21:01:35,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-05 21:01:35,249 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 272 [2023-12-05 21:01:35,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 363 transitions, 1902 flow. Second operand has 5 states, 5 states have (on average 186.0) internal successors, (930), 5 states have internal predecessors, (930), 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 21:01:35,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:01:35,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 272 [2023-12-05 21:01:35,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:01:35,843 INFO L124 PetriNetUnfolderBase]: 1092/5256 cut-off events. [2023-12-05 21:01:35,844 INFO L125 PetriNetUnfolderBase]: For 3405/4634 co-relation queries the response was YES. [2023-12-05 21:01:35,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12051 conditions, 5256 events. 1092/5256 cut-off events. For 3405/4634 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 53112 event pairs, 742 based on Foata normal form. 70/4555 useless extension candidates. Maximal degree in co-relation 3686. Up to 1645 conditions per place. [2023-12-05 21:01:35,886 INFO L140 encePairwiseOnDemand]: 262/272 looper letters, 145 selfloop transitions, 2 changer transitions 0/329 dead transitions. [2023-12-05 21:01:35,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 329 transitions, 1932 flow [2023-12-05 21:01:35,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-05 21:01:35,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-12-05 21:01:35,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 789 transitions. [2023-12-05 21:01:35,888 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7251838235294118 [2023-12-05 21:01:35,888 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 789 transitions. [2023-12-05 21:01:35,888 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 789 transitions. [2023-12-05 21:01:35,889 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:01:35,889 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 789 transitions. [2023-12-05 21:01:35,890 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 197.25) internal successors, (789), 4 states have internal predecessors, (789), 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 21:01:35,891 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 272.0) internal successors, (1360), 5 states have internal predecessors, (1360), 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 21:01:35,892 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 272.0) internal successors, (1360), 5 states have internal predecessors, (1360), 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 21:01:35,892 INFO L308 CegarLoopForPetriNet]: 246 programPoint places, -28 predicate places. [2023-12-05 21:01:35,892 INFO L500 AbstractCegarLoop]: Abstraction has has 218 places, 329 transitions, 1932 flow [2023-12-05 21:01:35,893 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 186.0) internal successors, (930), 5 states have internal predecessors, (930), 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 21:01:35,893 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:01:35,893 INFO L233 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:01:35,893 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-05 21:01:35,893 INFO L425 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-12-05 21:01:35,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:01:35,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1465967238, now seen corresponding path program 1 times [2023-12-05 21:01:35,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:01:35,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572002514] [2023-12-05 21:01:35,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:01:35,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:01:35,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-05 21:01:35,903 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-05 21:01:35,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-05 21:01:35,911 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-12-05 21:01:35,912 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-12-05 21:01:35,912 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (50 of 51 remaining) [2023-12-05 21:01:35,912 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (49 of 51 remaining) [2023-12-05 21:01:35,912 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 51 remaining) [2023-12-05 21:01:35,912 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 51 remaining) [2023-12-05 21:01:35,912 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 51 remaining) [2023-12-05 21:01:35,912 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 51 remaining) [2023-12-05 21:01:35,913 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 51 remaining) [2023-12-05 21:01:35,913 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 51 remaining) [2023-12-05 21:01:35,913 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 51 remaining) [2023-12-05 21:01:35,913 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 51 remaining) [2023-12-05 21:01:35,913 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 51 remaining) [2023-12-05 21:01:35,913 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 51 remaining) [2023-12-05 21:01:35,913 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 51 remaining) [2023-12-05 21:01:35,914 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 51 remaining) [2023-12-05 21:01:35,914 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 51 remaining) [2023-12-05 21:01:35,914 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 51 remaining) [2023-12-05 21:01:35,914 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 51 remaining) [2023-12-05 21:01:35,914 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 51 remaining) [2023-12-05 21:01:35,914 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 51 remaining) [2023-12-05 21:01:35,914 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 51 remaining) [2023-12-05 21:01:35,914 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 51 remaining) [2023-12-05 21:01:35,915 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 51 remaining) [2023-12-05 21:01:35,915 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 51 remaining) [2023-12-05 21:01:35,915 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 51 remaining) [2023-12-05 21:01:35,915 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 51 remaining) [2023-12-05 21:01:35,915 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 51 remaining) [2023-12-05 21:01:35,915 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 51 remaining) [2023-12-05 21:01:35,915 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 51 remaining) [2023-12-05 21:01:35,915 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 51 remaining) [2023-12-05 21:01:35,916 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 51 remaining) [2023-12-05 21:01:35,916 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 51 remaining) [2023-12-05 21:01:35,916 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 51 remaining) [2023-12-05 21:01:35,916 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 51 remaining) [2023-12-05 21:01:35,916 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 51 remaining) [2023-12-05 21:01:35,916 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 51 remaining) [2023-12-05 21:01:35,916 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 51 remaining) [2023-12-05 21:01:35,916 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 51 remaining) [2023-12-05 21:01:35,916 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 51 remaining) [2023-12-05 21:01:35,917 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 51 remaining) [2023-12-05 21:01:35,917 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 51 remaining) [2023-12-05 21:01:35,917 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 51 remaining) [2023-12-05 21:01:35,917 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 51 remaining) [2023-12-05 21:01:35,917 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 51 remaining) [2023-12-05 21:01:35,917 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 51 remaining) [2023-12-05 21:01:35,917 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 51 remaining) [2023-12-05 21:01:35,917 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 51 remaining) [2023-12-05 21:01:35,917 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 51 remaining) [2023-12-05 21:01:35,918 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 51 remaining) [2023-12-05 21:01:35,918 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 51 remaining) [2023-12-05 21:01:35,918 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 51 remaining) [2023-12-05 21:01:35,918 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 51 remaining) [2023-12-05 21:01:35,918 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-05 21:01:35,918 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-12-05 21:01:35,919 WARN L227 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-05 21:01:35,919 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-12-05 21:01:36,052 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-12-05 21:01:36,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 354 places, 393 transitions, 804 flow [2023-12-05 21:01:36,105 INFO L124 PetriNetUnfolderBase]: 49/436 cut-off events. [2023-12-05 21:01:36,105 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-12-05 21:01:36,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 449 conditions, 436 events. 49/436 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1855 event pairs, 0 based on Foata normal form. 0/327 useless extension candidates. Maximal degree in co-relation 375. Up to 8 conditions per place. [2023-12-05 21:01:36,112 INFO L82 GeneralOperation]: Start removeDead. Operand has 354 places, 393 transitions, 804 flow [2023-12-05 21:01:36,116 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 354 places, 393 transitions, 804 flow [2023-12-05 21:01:36,116 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-05 21:01:36,117 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;@3c4a1831, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-05 21:01:36,117 INFO L363 AbstractCegarLoop]: Starting to check reachability of 67 error locations. [2023-12-05 21:01:36,118 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-05 21:01:36,118 INFO L124 PetriNetUnfolderBase]: 1/22 cut-off events. [2023-12-05 21:01:36,118 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 21:01:36,118 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:01:36,118 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:01:36,118 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-12-05 21:01:36,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:01:36,118 INFO L85 PathProgramCache]: Analyzing trace with hash 733866945, now seen corresponding path program 1 times [2023-12-05 21:01:36,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:01:36,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377359601] [2023-12-05 21:01:36,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:01:36,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:01:36,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:01:36,135 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 21:01:36,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:01:36,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377359601] [2023-12-05 21:01:36,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377359601] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:01:36,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:01:36,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:01:36,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333501702] [2023-12-05 21:01:36,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:01:36,136 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:01:36,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:01:36,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:01:36,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:01:36,137 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 262 out of 393 [2023-12-05 21:01:36,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 393 transitions, 804 flow. Second operand has 3 states, 3 states have (on average 264.3333333333333) internal successors, (793), 3 states have internal predecessors, (793), 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 21:01:36,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:01:36,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 262 of 393 [2023-12-05 21:01:36,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:02:16,136 INFO L124 PetriNetUnfolderBase]: 120215/339884 cut-off events. [2023-12-05 21:02:16,136 INFO L125 PetriNetUnfolderBase]: For 8690/8690 co-relation queries the response was YES. [2023-12-05 21:02:18,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 501740 conditions, 339884 events. 120215/339884 cut-off events. For 8690/8690 co-relation queries the response was YES. Maximal size of possible extension queue 11337. Compared 5565020 event pairs, 90439 based on Foata normal form. 68551/300879 useless extension candidates. Maximal degree in co-relation 23052. Up to 137792 conditions per place. [2023-12-05 21:02:20,661 INFO L140 encePairwiseOnDemand]: 346/393 looper letters, 143 selfloop transitions, 5 changer transitions 0/387 dead transitions. [2023-12-05 21:02:20,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 387 transitions, 1100 flow [2023-12-05 21:02:20,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:02:20,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:02:20,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1017 transitions. [2023-12-05 21:02:20,664 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.8625954198473282 [2023-12-05 21:02:20,664 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1017 transitions. [2023-12-05 21:02:20,664 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1017 transitions. [2023-12-05 21:02:20,665 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:02:20,665 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1017 transitions. [2023-12-05 21:02:20,666 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 339.0) internal successors, (1017), 3 states have internal predecessors, (1017), 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 21:02:20,668 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 393.0) internal successors, (1572), 4 states have internal predecessors, (1572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:02:20,668 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 393.0) internal successors, (1572), 4 states have internal predecessors, (1572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:02:20,668 INFO L308 CegarLoopForPetriNet]: 354 programPoint places, -40 predicate places. [2023-12-05 21:02:20,669 INFO L500 AbstractCegarLoop]: Abstraction has has 314 places, 387 transitions, 1100 flow [2023-12-05 21:02:20,669 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 264.3333333333333) internal successors, (793), 3 states have internal predecessors, (793), 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 21:02:20,669 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:02:20,669 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:02:20,669 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-05 21:02:20,669 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-12-05 21:02:20,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:02:20,670 INFO L85 PathProgramCache]: Analyzing trace with hash 733866946, now seen corresponding path program 1 times [2023-12-05 21:02:20,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:02:20,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288859843] [2023-12-05 21:02:20,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:02:20,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:02:20,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:02:20,697 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 21:02:20,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:02:20,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288859843] [2023-12-05 21:02:20,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288859843] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:02:20,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:02:20,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:02:20,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875624517] [2023-12-05 21:02:20,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:02:20,698 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:02:20,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:02:20,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:02:20,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:02:20,699 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 393 [2023-12-05 21:02:20,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 387 transitions, 1100 flow. Second operand has 3 states, 3 states have (on average 268.0) internal successors, (804), 3 states have internal predecessors, (804), 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 21:02:20,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:02:20,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 393 [2023-12-05 21:02:20,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand