/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 -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_42-trylock2_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-wip.dk.empire-owicki-a20a710-m [2023-12-09 15:03:17,146 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-09 15:03:17,210 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 [2023-12-09 15:03:17,235 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-09 15:03:17,236 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-09 15:03:17,236 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-09 15:03:17,237 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-09 15:03:17,237 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-09 15:03:17,237 INFO L153 SettingsManager]: * Use SBE=true [2023-12-09 15:03:17,240 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-09 15:03:17,241 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-09 15:03:17,241 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-09 15:03:17,241 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-09 15:03:17,242 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-09 15:03:17,242 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-09 15:03:17,242 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-09 15:03:17,243 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-09 15:03:17,243 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-09 15:03:17,243 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-09 15:03:17,243 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-09 15:03:17,243 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-09 15:03:17,244 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-09 15:03:17,244 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-09 15:03:17,244 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-12-09 15:03:17,244 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-09 15:03:17,244 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-09 15:03:17,245 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-09 15:03:17,245 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-09 15:03:17,245 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-09 15:03:17,245 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-09 15:03:17,246 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-09 15:03:17,246 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-09 15:03:17,246 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-09 15:03:17,246 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> true [2023-12-09 15:03:17,423 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-09 15:03:17,442 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-09 15:03:17,444 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-09 15:03:17,444 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-09 15:03:17,445 INFO L274 PluginConnector]: CDTParser initialized [2023-12-09 15:03:17,445 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_42-trylock2_racefree.i [2023-12-09 15:03:18,415 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-09 15:03:18,605 INFO L384 CDTParser]: Found 1 translation units. [2023-12-09 15:03:18,605 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_42-trylock2_racefree.i [2023-12-09 15:03:18,616 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e4a57e49b/442ea87157bc4e8eb2cc9d8f3243f120/FLAGa84417b95 [2023-12-09 15:03:18,993 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e4a57e49b/442ea87157bc4e8eb2cc9d8f3243f120 [2023-12-09 15:03:18,996 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-09 15:03:18,997 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-09 15:03:18,998 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-09 15:03:18,998 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-09 15:03:19,003 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-09 15:03:19,004 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 03:03:18" (1/1) ... [2023-12-09 15:03:19,005 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7897af41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:03:19, skipping insertion in model container [2023-12-09 15:03:19,006 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 03:03:18" (1/1) ... [2023-12-09 15:03:19,037 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-09 15:03:19,254 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_42-trylock2_racefree.i[30176,30189] [2023-12-09 15:03:19,273 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-09 15:03:19,283 INFO L202 MainTranslator]: Completed pre-run [2023-12-09 15:03:19,318 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_42-trylock2_racefree.i[30176,30189] [2023-12-09 15:03:19,325 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-09 15:03:19,353 INFO L206 MainTranslator]: Completed translation [2023-12-09 15:03:19,354 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:03:19 WrapperNode [2023-12-09 15:03:19,354 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-09 15:03:19,355 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-09 15:03:19,355 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-09 15:03:19,355 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-09 15:03:19,360 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:03:19" (1/1) ... [2023-12-09 15:03:19,370 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:03:19" (1/1) ... [2023-12-09 15:03:19,387 INFO L138 Inliner]: procedures = 172, calls = 60, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 152 [2023-12-09 15:03:19,387 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-09 15:03:19,388 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-09 15:03:19,388 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-09 15:03:19,388 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-09 15:03:19,394 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:03:19" (1/1) ... [2023-12-09 15:03:19,394 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:03:19" (1/1) ... [2023-12-09 15:03:19,403 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:03:19" (1/1) ... [2023-12-09 15:03:19,404 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:03:19" (1/1) ... [2023-12-09 15:03:19,410 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:03:19" (1/1) ... [2023-12-09 15:03:19,418 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:03:19" (1/1) ... [2023-12-09 15:03:19,420 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:03:19" (1/1) ... [2023-12-09 15:03:19,420 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:03:19" (1/1) ... [2023-12-09 15:03:19,423 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-09 15:03:19,423 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-09 15:03:19,424 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-09 15:03:19,424 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-09 15:03:19,424 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:03:19" (1/1) ... [2023-12-09 15:03:19,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-09 15:03:19,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-09 15:03:19,448 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) [2023-12-09 15:03:19,462 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 [2023-12-09 15:03:19,467 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-09 15:03:19,468 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-09 15:03:19,468 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-12-09 15:03:19,468 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-09 15:03:19,468 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-09 15:03:19,468 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-12-09 15:03:19,468 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-12-09 15:03:19,468 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-09 15:03:19,468 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexTryLock [2023-12-09 15:03:19,468 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-09 15:03:19,468 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-12-09 15:03:19,469 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-09 15:03:19,469 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-09 15:03:19,470 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-12-09 15:03:19,587 INFO L241 CfgBuilder]: Building ICFG [2023-12-09 15:03:19,589 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-09 15:03:19,780 INFO L282 CfgBuilder]: Performing block encoding [2023-12-09 15:03:19,816 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-09 15:03:19,816 INFO L309 CfgBuilder]: Removed 23 assume(true) statements. [2023-12-09 15:03:19,817 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 03:03:19 BoogieIcfgContainer [2023-12-09 15:03:19,817 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-09 15:03:19,819 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-09 15:03:19,819 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-09 15:03:19,821 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-09 15:03:19,821 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 03:03:18" (1/3) ... [2023-12-09 15:03:19,822 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70b65353 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 03:03:19, skipping insertion in model container [2023-12-09 15:03:19,822 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:03:19" (2/3) ... [2023-12-09 15:03:19,822 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70b65353 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 03:03:19, skipping insertion in model container [2023-12-09 15:03:19,822 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 03:03:19" (3/3) ... [2023-12-09 15:03:19,823 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_42-trylock2_racefree.i [2023-12-09 15:03:19,836 INFO L197 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-09 15:03:19,836 INFO L156 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2023-12-09 15:03:19,836 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-12-09 15:03:19,884 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-12-09 15:03:19,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 181 places, 207 transitions, 421 flow [2023-12-09 15:03:20,049 INFO L124 PetriNetUnfolderBase]: 45/310 cut-off events. [2023-12-09 15:03:20,049 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-12-09 15:03:20,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 315 conditions, 310 events. 45/310 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1281 event pairs, 0 based on Foata normal form. 0/254 useless extension candidates. Maximal degree in co-relation 167. Up to 6 conditions per place. [2023-12-09 15:03:20,066 INFO L82 GeneralOperation]: Start removeDead. Operand has 181 places, 207 transitions, 421 flow [2023-12-09 15:03:20,075 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 177 places, 202 transitions, 408 flow [2023-12-09 15:03:20,088 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-09 15:03:20,092 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;@1aa942bb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-09 15:03:20,093 INFO L363 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-12-09 15:03:20,109 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-09 15:03:20,109 INFO L124 PetriNetUnfolderBase]: 6/97 cut-off events. [2023-12-09 15:03:20,109 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-09 15:03:20,109 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-09 15:03:20,110 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-09 15:03:20,110 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-12-09 15:03:20,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-09 15:03:20,115 INFO L85 PathProgramCache]: Analyzing trace with hash -851049209, now seen corresponding path program 1 times [2023-12-09 15:03:20,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-09 15:03:20,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089586833] [2023-12-09 15:03:20,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 15:03:20,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-09 15:03:20,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-09 15:03:20,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-09 15:03:20,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-09 15:03:20,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089586833] [2023-12-09 15:03:20,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089586833] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-09 15:03:20,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-09 15:03:20,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-09 15:03:20,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51929172] [2023-12-09 15:03:20,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-09 15:03:20,348 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-09 15:03:20,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-09 15:03:20,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-09 15:03:20,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-09 15:03:20,370 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 207 [2023-12-09 15:03:20,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 202 transitions, 408 flow. Second operand has 3 states, 3 states have (on average 141.0) internal successors, (423), 3 states have internal predecessors, (423), 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) [2023-12-09 15:03:20,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-09 15:03:20,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 207 [2023-12-09 15:03:20,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-09 15:03:20,639 INFO L124 PetriNetUnfolderBase]: 265/1517 cut-off events. [2023-12-09 15:03:20,640 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-09 15:03:20,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2064 conditions, 1517 events. 265/1517 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 10055 event pairs, 12 based on Foata normal form. 293/1702 useless extension candidates. Maximal degree in co-relation 2003. Up to 502 conditions per place. [2023-12-09 15:03:20,651 INFO L140 encePairwiseOnDemand]: 177/207 looper letters, 45 selfloop transitions, 2 changer transitions 16/185 dead transitions. [2023-12-09 15:03:20,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 185 transitions, 474 flow [2023-12-09 15:03:20,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-09 15:03:20,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-09 15:03:20,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 508 transitions. [2023-12-09 15:03:20,666 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.8180354267310789 [2023-12-09 15:03:20,667 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 508 transitions. [2023-12-09 15:03:20,667 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 508 transitions. [2023-12-09 15:03:20,670 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-09 15:03:20,672 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 508 transitions. [2023-12-09 15:03:20,675 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 169.33333333333334) internal successors, (508), 3 states have internal predecessors, (508), 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) [2023-12-09 15:03:20,680 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 207.0) internal successors, (828), 4 states have internal predecessors, (828), 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) [2023-12-09 15:03:20,680 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 207.0) internal successors, (828), 4 states have internal predecessors, (828), 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) [2023-12-09 15:03:20,685 INFO L308 CegarLoopForPetriNet]: 177 programPoint places, -2 predicate places. [2023-12-09 15:03:20,686 INFO L500 AbstractCegarLoop]: Abstraction has has 175 places, 185 transitions, 474 flow [2023-12-09 15:03:20,686 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 141.0) internal successors, (423), 3 states have internal predecessors, (423), 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) [2023-12-09 15:03:20,686 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-09 15:03:20,687 INFO L233 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-09 15:03:20,687 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-09 15:03:20,688 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-12-09 15:03:20,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-09 15:03:20,688 INFO L85 PathProgramCache]: Analyzing trace with hash -184995863, now seen corresponding path program 1 times [2023-12-09 15:03:20,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-09 15:03:20,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116934061] [2023-12-09 15:03:20,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 15:03:20,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-09 15:03:20,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-09 15:03:20,746 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-09 15:03:20,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-09 15:03:20,796 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-12-09 15:03:20,796 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-12-09 15:03:20,798 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-12-09 15:03:20,799 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-12-09 15:03:20,799 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-12-09 15:03:20,799 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-12-09 15:03:20,800 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-12-09 15:03:20,800 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-09 15:03:20,800 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1] [2023-12-09 15:03:20,802 WARN L227 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-09 15:03:20,803 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-12-09 15:03:20,843 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-12-09 15:03:20,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 231 places, 268 transitions, 552 flow [2023-12-09 15:03:20,922 INFO L124 PetriNetUnfolderBase]: 76/500 cut-off events. [2023-12-09 15:03:20,922 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-12-09 15:03:20,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 512 conditions, 500 events. 76/500 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2328 event pairs, 0 based on Foata normal form. 0/408 useless extension candidates. Maximal degree in co-relation 312. Up to 9 conditions per place. [2023-12-09 15:03:20,925 INFO L82 GeneralOperation]: Start removeDead. Operand has 231 places, 268 transitions, 552 flow [2023-12-09 15:03:20,929 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 231 places, 268 transitions, 552 flow [2023-12-09 15:03:20,931 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-09 15:03:20,932 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;@1aa942bb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-09 15:03:20,932 INFO L363 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-12-09 15:03:20,938 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-09 15:03:20,938 INFO L124 PetriNetUnfolderBase]: 6/94 cut-off events. [2023-12-09 15:03:20,938 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-09 15:03:20,939 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-09 15:03:20,939 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-09 15:03:20,939 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-12-09 15:03:20,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-09 15:03:20,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1727773177, now seen corresponding path program 1 times [2023-12-09 15:03:20,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-09 15:03:20,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218176359] [2023-12-09 15:03:20,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 15:03:20,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-09 15:03:20,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-09 15:03:21,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-09 15:03:21,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-09 15:03:21,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218176359] [2023-12-09 15:03:21,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218176359] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-09 15:03:21,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-09 15:03:21,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-09 15:03:21,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042473433] [2023-12-09 15:03:21,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-09 15:03:21,025 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-09 15:03:21,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-09 15:03:21,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-09 15:03:21,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-09 15:03:21,028 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 268 [2023-12-09 15:03:21,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 268 transitions, 552 flow. Second operand has 3 states, 3 states have (on average 176.0) internal successors, (528), 3 states have internal predecessors, (528), 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) [2023-12-09 15:03:21,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-09 15:03:21,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 268 [2023-12-09 15:03:21,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-09 15:03:23,682 INFO L124 PetriNetUnfolderBase]: 7192/24488 cut-off events. [2023-12-09 15:03:23,682 INFO L125 PetriNetUnfolderBase]: For 266/266 co-relation queries the response was YES. [2023-12-09 15:03:23,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35607 conditions, 24488 events. 7192/24488 cut-off events. For 266/266 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 279344 event pairs, 3312 based on Foata normal form. 6337/29169 useless extension candidates. Maximal degree in co-relation 2588. Up to 11006 conditions per place. [2023-12-09 15:03:23,811 INFO L140 encePairwiseOnDemand]: 226/268 looper letters, 60 selfloop transitions, 2 changer transitions 22/241 dead transitions. [2023-12-09 15:03:23,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 241 transitions, 632 flow [2023-12-09 15:03:23,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-09 15:03:23,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-09 15:03:23,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 642 transitions. [2023-12-09 15:03:23,813 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7985074626865671 [2023-12-09 15:03:23,814 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 642 transitions. [2023-12-09 15:03:23,816 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 642 transitions. [2023-12-09 15:03:23,817 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-09 15:03:23,821 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 642 transitions. [2023-12-09 15:03:23,823 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 214.0) internal successors, (642), 3 states have internal predecessors, (642), 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) [2023-12-09 15:03:23,825 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 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) [2023-12-09 15:03:23,825 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 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) [2023-12-09 15:03:23,826 INFO L308 CegarLoopForPetriNet]: 231 programPoint places, -2 predicate places. [2023-12-09 15:03:23,826 INFO L500 AbstractCegarLoop]: Abstraction has has 229 places, 241 transitions, 632 flow [2023-12-09 15:03:23,826 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 176.0) internal successors, (528), 3 states have internal predecessors, (528), 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) [2023-12-09 15:03:23,826 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-09 15:03:23,827 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-09 15:03:23,827 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-09 15:03:23,827 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-12-09 15:03:23,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-09 15:03:23,828 INFO L85 PathProgramCache]: Analyzing trace with hash -649602278, now seen corresponding path program 1 times [2023-12-09 15:03:23,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-09 15:03:23,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147469350] [2023-12-09 15:03:23,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 15:03:23,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-09 15:03:23,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-09 15:03:23,948 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-09 15:03:23,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-09 15:03:23,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147469350] [2023-12-09 15:03:23,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147469350] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-09 15:03:23,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706985815] [2023-12-09 15:03:23,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 15:03:23,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-09 15:03:23,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-09 15:03:23,951 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-09 15:03:23,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-09 15:03:24,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-09 15:03:24,035 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-09 15:03:24,037 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-09 15:03:24,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-09 15:03:24,095 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-09 15:03:24,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-09 15:03:24,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706985815] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-09 15:03:24,210 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-09 15:03:24,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-12-09 15:03:24,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757560195] [2023-12-09 15:03:24,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-09 15:03:24,211 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-09 15:03:24,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-09 15:03:24,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-09 15:03:24,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-12-09 15:03:24,218 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 268 [2023-12-09 15:03:24,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 241 transitions, 632 flow. Second operand has 10 states, 10 states have (on average 175.6) internal successors, (1756), 10 states have internal predecessors, (1756), 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) [2023-12-09 15:03:24,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-09 15:03:24,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 268 [2023-12-09 15:03:24,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-09 15:03:24,772 INFO L124 PetriNetUnfolderBase]: 1776/4989 cut-off events. [2023-12-09 15:03:24,773 INFO L125 PetriNetUnfolderBase]: For 1012/1370 co-relation queries the response was YES. [2023-12-09 15:03:24,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10597 conditions, 4989 events. 1776/4989 cut-off events. For 1012/1370 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 41477 event pairs, 234 based on Foata normal form. 12/4999 useless extension candidates. Maximal degree in co-relation 787. Up to 2650 conditions per place. [2023-12-09 15:03:24,803 INFO L140 encePairwiseOnDemand]: 263/268 looper letters, 141 selfloop transitions, 7 changer transitions 0/254 dead transitions. [2023-12-09 15:03:24,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 254 transitions, 1106 flow [2023-12-09 15:03:24,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-09 15:03:24,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-12-09 15:03:24,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1707 transitions. [2023-12-09 15:03:24,807 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7077114427860697 [2023-12-09 15:03:24,807 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1707 transitions. [2023-12-09 15:03:24,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1707 transitions. [2023-12-09 15:03:24,808 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-09 15:03:24,808 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1707 transitions. [2023-12-09 15:03:24,811 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 189.66666666666666) internal successors, (1707), 9 states have internal predecessors, (1707), 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) [2023-12-09 15:03:24,814 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 268.0) internal successors, (2680), 10 states have internal predecessors, (2680), 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) [2023-12-09 15:03:24,815 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 268.0) internal successors, (2680), 10 states have internal predecessors, (2680), 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) [2023-12-09 15:03:24,815 INFO L308 CegarLoopForPetriNet]: 231 programPoint places, -77 predicate places. [2023-12-09 15:03:24,815 INFO L500 AbstractCegarLoop]: Abstraction has has 154 places, 254 transitions, 1106 flow [2023-12-09 15:03:24,817 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 175.6) internal successors, (1756), 10 states have internal predecessors, (1756), 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) [2023-12-09 15:03:24,817 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-09 15:03:24,817 INFO L233 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-09 15:03:24,881 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-12-09 15:03:25,021 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-09 15:03:25,021 INFO L425 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-12-09 15:03:25,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-09 15:03:25,022 INFO L85 PathProgramCache]: Analyzing trace with hash -951874317, now seen corresponding path program 1 times [2023-12-09 15:03:25,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-09 15:03:25,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467473961] [2023-12-09 15:03:25,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 15:03:25,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-09 15:03:25,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-09 15:03:25,042 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-09 15:03:25,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-09 15:03:25,059 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-12-09 15:03:25,059 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-12-09 15:03:25,059 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-12-09 15:03:25,059 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-12-09 15:03:25,059 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-12-09 15:03:25,059 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-12-09 15:03:25,063 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-12-09 15:03:25,063 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-09 15:03:25,063 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-12-09 15:03:25,064 WARN L227 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-09 15:03:25,064 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-12-09 15:03:25,093 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-12-09 15:03:25,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 281 places, 329 transitions, 685 flow [2023-12-09 15:03:25,162 INFO L124 PetriNetUnfolderBase]: 112/725 cut-off events. [2023-12-09 15:03:25,162 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-12-09 15:03:25,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 750 conditions, 725 events. 112/725 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 3519 event pairs, 1 based on Foata normal form. 0/593 useless extension candidates. Maximal degree in co-relation 508. Up to 16 conditions per place. [2023-12-09 15:03:25,169 INFO L82 GeneralOperation]: Start removeDead. Operand has 281 places, 329 transitions, 685 flow [2023-12-09 15:03:25,175 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 281 places, 329 transitions, 685 flow [2023-12-09 15:03:25,177 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-09 15:03:25,178 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;@1aa942bb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-09 15:03:25,178 INFO L363 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-12-09 15:03:25,182 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-09 15:03:25,182 INFO L124 PetriNetUnfolderBase]: 6/94 cut-off events. [2023-12-09 15:03:25,182 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-09 15:03:25,182 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-09 15:03:25,182 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-09 15:03:25,182 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-12-09 15:03:25,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-09 15:03:25,183 INFO L85 PathProgramCache]: Analyzing trace with hash -336046393, now seen corresponding path program 1 times [2023-12-09 15:03:25,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-09 15:03:25,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196196612] [2023-12-09 15:03:25,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 15:03:25,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-09 15:03:25,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-09 15:03:25,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-09 15:03:25,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-09 15:03:25,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196196612] [2023-12-09 15:03:25,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196196612] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-09 15:03:25,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-09 15:03:25,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-09 15:03:25,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335217884] [2023-12-09 15:03:25,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-09 15:03:25,223 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-09 15:03:25,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-09 15:03:25,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-09 15:03:25,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-09 15:03:25,227 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 329 [2023-12-09 15:03:25,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 329 transitions, 685 flow. Second operand has 3 states, 3 states have (on average 211.0) internal successors, (633), 3 states have internal predecessors, (633), 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) [2023-12-09 15:03:25,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-09 15:03:25,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 329 [2023-12-09 15:03:25,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-09 15:04:07,627 INFO L124 PetriNetUnfolderBase]: 140974/348073 cut-off events. [2023-12-09 15:04:07,627 INFO L125 PetriNetUnfolderBase]: For 2791/2791 co-relation queries the response was YES. [2023-12-09 15:04:09,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 543078 conditions, 348073 events. 140974/348073 cut-off events. For 2791/2791 co-relation queries the response was YES. Maximal size of possible extension queue 5097. Compared 4970489 event pairs, 91645 based on Foata normal form. 115370/455904 useless extension candidates. Maximal degree in co-relation 35434. Up to 193655 conditions per place. [2023-12-09 15:04:11,330 INFO L140 encePairwiseOnDemand]: 275/329 looper letters, 73 selfloop transitions, 2 changer transitions 23/290 dead transitions. [2023-12-09 15:04:11,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 290 transitions, 769 flow [2023-12-09 15:04:11,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-09 15:04:11,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-09 15:04:11,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 773 transitions. [2023-12-09 15:04:11,334 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7831813576494427 [2023-12-09 15:04:11,334 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 773 transitions. [2023-12-09 15:04:11,334 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 773 transitions. [2023-12-09 15:04:11,334 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-09 15:04:11,334 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 773 transitions. [2023-12-09 15:04:11,336 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 257.6666666666667) internal successors, (773), 3 states have internal predecessors, (773), 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) [2023-12-09 15:04:11,337 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 329.0) internal successors, (1316), 4 states have internal predecessors, (1316), 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) [2023-12-09 15:04:11,338 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 329.0) internal successors, (1316), 4 states have internal predecessors, (1316), 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) [2023-12-09 15:04:11,340 INFO L308 CegarLoopForPetriNet]: 281 programPoint places, -2 predicate places. [2023-12-09 15:04:11,341 INFO L500 AbstractCegarLoop]: Abstraction has has 279 places, 290 transitions, 769 flow [2023-12-09 15:04:11,341 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 211.0) internal successors, (633), 3 states have internal predecessors, (633), 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) [2023-12-09 15:04:11,341 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-09 15:04:11,341 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-09 15:04:11,341 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-09 15:04:11,341 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-12-09 15:04:11,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-09 15:04:11,342 INFO L85 PathProgramCache]: Analyzing trace with hash -674290763, now seen corresponding path program 1 times [2023-12-09 15:04:11,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-09 15:04:11,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523735763] [2023-12-09 15:04:11,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 15:04:11,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-09 15:04:11,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-09 15:04:11,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-09 15:04:11,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-09 15:04:11,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523735763] [2023-12-09 15:04:11,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523735763] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-09 15:04:11,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024350633] [2023-12-09 15:04:11,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 15:04:11,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-09 15:04:11,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-09 15:04:11,477 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-09 15:04:11,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-09 15:04:11,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-09 15:04:11,608 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-09 15:04:11,617 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-09 15:04:11,657 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-09 15:04:11,657 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-09 15:04:11,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-09 15:04:11,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024350633] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-09 15:04:11,701 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-09 15:04:11,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-12-09 15:04:11,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857609242] [2023-12-09 15:04:11,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-09 15:04:11,702 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-09 15:04:11,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-09 15:04:11,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-09 15:04:11,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-12-09 15:04:11,705 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 208 out of 329 [2023-12-09 15:04:11,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 290 transitions, 769 flow. Second operand has 10 states, 10 states have (on average 210.6) internal successors, (2106), 10 states have internal predecessors, (2106), 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) [2023-12-09 15:04:11,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-09 15:04:11,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 208 of 329 [2023-12-09 15:04:11,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand