/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/pthread-ext/14_spin2003.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-wip.dk.empire-owicki-a20a710-m [2023-12-09 14:52:45,483 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-09 14:52:45,549 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 14:52:45,573 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-09 14:52:45,574 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-09 14:52:45,574 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-09 14:52:45,575 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-09 14:52:45,575 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-09 14:52:45,575 INFO L153 SettingsManager]: * Use SBE=true [2023-12-09 14:52:45,578 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-09 14:52:45,578 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-09 14:52:45,578 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-09 14:52:45,578 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-09 14:52:45,579 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-09 14:52:45,579 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-09 14:52:45,580 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-09 14:52:45,580 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-09 14:52:45,580 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-09 14:52:45,580 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-09 14:52:45,580 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-09 14:52:45,580 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-09 14:52:45,581 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-09 14:52:45,581 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-09 14:52:45,581 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-12-09 14:52:45,581 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-09 14:52:45,582 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-09 14:52:45,582 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-09 14:52:45,582 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-09 14:52:45,583 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-09 14:52:45,583 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-09 14:52:45,583 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-09 14:52:45,584 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-09 14:52:45,584 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-09 14:52:45,584 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> true [2023-12-09 14:52:45,767 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-09 14:52:45,782 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-09 14:52:45,783 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-09 14:52:45,784 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-09 14:52:45,784 INFO L274 PluginConnector]: CDTParser initialized [2023-12-09 14:52:45,785 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/14_spin2003.i [2023-12-09 14:52:46,735 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-09 14:52:46,932 INFO L384 CDTParser]: Found 1 translation units. [2023-12-09 14:52:46,932 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/14_spin2003.i [2023-12-09 14:52:46,946 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af3485d86/fece230d42484cd6bb7a9945ca3bff8b/FLAGa3f30c026 [2023-12-09 14:52:46,960 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af3485d86/fece230d42484cd6bb7a9945ca3bff8b [2023-12-09 14:52:46,962 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-09 14:52:46,963 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-09 14:52:46,965 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-09 14:52:46,965 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-09 14:52:46,968 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-09 14:52:46,969 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 02:52:46" (1/1) ... [2023-12-09 14:52:46,969 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b84572e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:52:46, skipping insertion in model container [2023-12-09 14:52:46,970 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 02:52:46" (1/1) ... [2023-12-09 14:52:47,010 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-09 14:52:47,248 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/14_spin2003.i[30203,30216] [2023-12-09 14:52:47,254 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-09 14:52:47,267 INFO L202 MainTranslator]: Completed pre-run [2023-12-09 14:52:47,299 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/14_spin2003.i[30203,30216] [2023-12-09 14:52:47,300 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-09 14:52:47,320 INFO L206 MainTranslator]: Completed translation [2023-12-09 14:52:47,320 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:52:47 WrapperNode [2023-12-09 14:52:47,321 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-09 14:52:47,321 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-09 14:52:47,321 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-09 14:52:47,321 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-09 14:52:47,325 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:52:47" (1/1) ... [2023-12-09 14:52:47,333 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:52:47" (1/1) ... [2023-12-09 14:52:47,344 INFO L138 Inliner]: procedures = 169, calls = 14, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 46 [2023-12-09 14:52:47,344 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-09 14:52:47,344 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-09 14:52:47,345 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-09 14:52:47,345 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-09 14:52:47,349 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:52:47" (1/1) ... [2023-12-09 14:52:47,349 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:52:47" (1/1) ... [2023-12-09 14:52:47,351 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:52:47" (1/1) ... [2023-12-09 14:52:47,351 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:52:47" (1/1) ... [2023-12-09 14:52:47,354 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:52:47" (1/1) ... [2023-12-09 14:52:47,357 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:52:47" (1/1) ... [2023-12-09 14:52:47,366 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:52:47" (1/1) ... [2023-12-09 14:52:47,367 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:52:47" (1/1) ... [2023-12-09 14:52:47,368 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-09 14:52:47,369 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-09 14:52:47,369 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-09 14:52:47,369 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-09 14:52:47,369 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:52:47" (1/1) ... [2023-12-09 14:52:47,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-09 14:52:47,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-09 14:52:47,394 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 14:52:47,404 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 14:52:47,421 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-12-09 14:52:47,421 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-12-09 14:52:47,421 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-09 14:52:47,421 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-09 14:52:47,421 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-09 14:52:47,421 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-09 14:52:47,422 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-09 14:52:47,422 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-09 14:52:47,422 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-09 14:52:47,423 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 14:52:47,503 INFO L241 CfgBuilder]: Building ICFG [2023-12-09 14:52:47,505 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-09 14:52:47,630 INFO L282 CfgBuilder]: Performing block encoding [2023-12-09 14:52:47,670 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-09 14:52:47,670 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-09 14:52:47,675 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 02:52:47 BoogieIcfgContainer [2023-12-09 14:52:47,675 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-09 14:52:47,677 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-09 14:52:47,677 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-09 14:52:47,679 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-09 14:52:47,679 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 02:52:46" (1/3) ... [2023-12-09 14:52:47,679 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7726991a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 02:52:47, skipping insertion in model container [2023-12-09 14:52:47,680 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:52:47" (2/3) ... [2023-12-09 14:52:47,680 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7726991a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 02:52:47, skipping insertion in model container [2023-12-09 14:52:47,680 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 02:52:47" (3/3) ... [2023-12-09 14:52:47,681 INFO L112 eAbstractionObserver]: Analyzing ICFG 14_spin2003.i [2023-12-09 14:52:47,691 INFO L197 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-09 14:52:47,691 INFO L156 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-09 14:52:47,691 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-12-09 14:52:47,714 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-12-09 14:52:47,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 39 places, 38 transitions, 80 flow [2023-12-09 14:52:47,762 INFO L124 PetriNetUnfolderBase]: 3/49 cut-off events. [2023-12-09 14:52:47,763 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-09 14:52:47,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53 conditions, 49 events. 3/49 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 68 event pairs, 0 based on Foata normal form. 0/43 useless extension candidates. Maximal degree in co-relation 25. Up to 4 conditions per place. [2023-12-09 14:52:47,767 INFO L82 GeneralOperation]: Start removeDead. Operand has 39 places, 38 transitions, 80 flow [2023-12-09 14:52:47,769 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 39 places, 38 transitions, 80 flow [2023-12-09 14:52:47,775 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-09 14:52:47,779 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;@1082e076, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-09 14:52:47,779 INFO L363 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-12-09 14:52:47,786 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-09 14:52:47,786 INFO L124 PetriNetUnfolderBase]: 2/39 cut-off events. [2023-12-09 14:52:47,786 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-09 14:52:47,786 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-09 14:52:47,786 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] [2023-12-09 14:52:47,786 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-09 14:52:47,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-09 14:52:47,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1601514213, now seen corresponding path program 1 times [2023-12-09 14:52:47,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-09 14:52:47,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604688550] [2023-12-09 14:52:47,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 14:52:47,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-09 14:52:47,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-09 14:52:48,042 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 14:52:48,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-09 14:52:48,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604688550] [2023-12-09 14:52:48,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604688550] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-09 14:52:48,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-09 14:52:48,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-09 14:52:48,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215354977] [2023-12-09 14:52:48,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-09 14:52:48,052 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-09 14:52:48,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-09 14:52:48,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-09 14:52:48,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-09 14:52:48,077 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 38 [2023-12-09 14:52:48,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 38 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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 14:52:48,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-09 14:52:48,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 38 [2023-12-09 14:52:48,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-09 14:52:48,107 INFO L124 PetriNetUnfolderBase]: 0/31 cut-off events. [2023-12-09 14:52:48,108 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-12-09 14:52:48,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43 conditions, 31 events. 0/31 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 13 event pairs, 0 based on Foata normal form. 7/38 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2023-12-09 14:52:48,109 INFO L140 encePairwiseOnDemand]: 32/38 looper letters, 4 selfloop transitions, 3 changer transitions 0/27 dead transitions. [2023-12-09 14:52:48,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 27 transitions, 72 flow [2023-12-09 14:52:48,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-09 14:52:48,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-09 14:52:48,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 90 transitions. [2023-12-09 14:52:48,117 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7894736842105263 [2023-12-09 14:52:48,117 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 90 transitions. [2023-12-09 14:52:48,118 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 90 transitions. [2023-12-09 14:52:48,119 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-09 14:52:48,120 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 90 transitions. [2023-12-09 14:52:48,122 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 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 14:52:48,124 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 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 14:52:48,124 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 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 14:52:48,127 INFO L308 CegarLoopForPetriNet]: 39 programPoint places, -7 predicate places. [2023-12-09 14:52:48,127 INFO L500 AbstractCegarLoop]: Abstraction has has 32 places, 27 transitions, 72 flow [2023-12-09 14:52:48,127 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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 14:52:48,127 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-09 14:52:48,128 INFO L233 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-09 14:52:48,128 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-09 14:52:48,128 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-09 14:52:48,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-09 14:52:48,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1676842577, now seen corresponding path program 1 times [2023-12-09 14:52:48,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-09 14:52:48,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420103108] [2023-12-09 14:52:48,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 14:52:48,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-09 14:52:48,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-09 14:52:48,150 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-09 14:52:48,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-09 14:52:48,182 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-12-09 14:52:48,182 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-12-09 14:52:48,184 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-12-09 14:52:48,185 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-12-09 14:52:48,185 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-12-09 14:52:48,185 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-09 14:52:48,185 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1] [2023-12-09 14:52:48,187 WARN L227 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-09 14:52:48,187 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-12-09 14:52:48,201 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-12-09 14:52:48,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 51 transitions, 112 flow [2023-12-09 14:52:48,219 INFO L124 PetriNetUnfolderBase]: 5/75 cut-off events. [2023-12-09 14:52:48,219 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-12-09 14:52:48,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83 conditions, 75 events. 5/75 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 124 event pairs, 0 based on Foata normal form. 0/65 useless extension candidates. Maximal degree in co-relation 50. Up to 6 conditions per place. [2023-12-09 14:52:48,221 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 51 transitions, 112 flow [2023-12-09 14:52:48,222 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 53 places, 51 transitions, 112 flow [2023-12-09 14:52:48,224 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-09 14:52:48,226 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;@1082e076, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-09 14:52:48,226 INFO L363 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-12-09 14:52:48,238 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-09 14:52:48,238 INFO L124 PetriNetUnfolderBase]: 2/38 cut-off events. [2023-12-09 14:52:48,239 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-09 14:52:48,239 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-09 14:52:48,239 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] [2023-12-09 14:52:48,239 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-12-09 14:52:48,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-09 14:52:48,243 INFO L85 PathProgramCache]: Analyzing trace with hash 782212807, now seen corresponding path program 1 times [2023-12-09 14:52:48,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-09 14:52:48,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059874476] [2023-12-09 14:52:48,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 14:52:48,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-09 14:52:48,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-09 14:52:48,302 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 14:52:48,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-09 14:52:48,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059874476] [2023-12-09 14:52:48,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059874476] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-09 14:52:48,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-09 14:52:48,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-09 14:52:48,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465281717] [2023-12-09 14:52:48,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-09 14:52:48,304 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-09 14:52:48,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-09 14:52:48,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-09 14:52:48,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-09 14:52:48,305 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 51 [2023-12-09 14:52:48,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 51 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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 14:52:48,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-09 14:52:48,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 51 [2023-12-09 14:52:48,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-09 14:52:48,366 INFO L124 PetriNetUnfolderBase]: 34/152 cut-off events. [2023-12-09 14:52:48,367 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2023-12-09 14:52:48,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267 conditions, 152 events. 34/152 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 554 event pairs, 13 based on Foata normal form. 63/210 useless extension candidates. Maximal degree in co-relation 116. Up to 69 conditions per place. [2023-12-09 14:52:48,368 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 21 selfloop transitions, 5 changer transitions 0/51 dead transitions. [2023-12-09 14:52:48,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 51 transitions, 169 flow [2023-12-09 14:52:48,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-09 14:52:48,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-09 14:52:48,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 126 transitions. [2023-12-09 14:52:48,376 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.8235294117647058 [2023-12-09 14:52:48,376 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 126 transitions. [2023-12-09 14:52:48,376 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 126 transitions. [2023-12-09 14:52:48,377 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-09 14:52:48,377 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 126 transitions. [2023-12-09 14:52:48,377 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 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 14:52:48,378 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 51.0) internal successors, (204), 4 states have internal predecessors, (204), 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 14:52:48,378 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 51.0) internal successors, (204), 4 states have internal predecessors, (204), 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 14:52:48,379 INFO L308 CegarLoopForPetriNet]: 53 programPoint places, -6 predicate places. [2023-12-09 14:52:48,379 INFO L500 AbstractCegarLoop]: Abstraction has has 47 places, 51 transitions, 169 flow [2023-12-09 14:52:48,379 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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 14:52:48,379 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-09 14:52:48,379 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] [2023-12-09 14:52:48,380 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-09 14:52:48,380 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-12-09 14:52:48,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-09 14:52:48,380 INFO L85 PathProgramCache]: Analyzing trace with hash 365500225, now seen corresponding path program 1 times [2023-12-09 14:52:48,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-09 14:52:48,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048246889] [2023-12-09 14:52:48,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 14:52:48,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-09 14:52:48,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-09 14:52:48,393 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-09 14:52:48,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-09 14:52:48,403 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-12-09 14:52:48,403 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-12-09 14:52:48,403 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-12-09 14:52:48,403 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-12-09 14:52:48,403 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-12-09 14:52:48,403 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-12-09 14:52:48,403 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-09 14:52:48,404 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1] [2023-12-09 14:52:48,404 WARN L227 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-09 14:52:48,404 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-12-09 14:52:48,416 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-12-09 14:52:48,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 67 places, 64 transitions, 146 flow [2023-12-09 14:52:48,425 INFO L124 PetriNetUnfolderBase]: 7/101 cut-off events. [2023-12-09 14:52:48,425 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-12-09 14:52:48,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114 conditions, 101 events. 7/101 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 194 event pairs, 0 based on Foata normal form. 0/87 useless extension candidates. Maximal degree in co-relation 79. Up to 8 conditions per place. [2023-12-09 14:52:48,425 INFO L82 GeneralOperation]: Start removeDead. Operand has 67 places, 64 transitions, 146 flow [2023-12-09 14:52:48,426 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 67 places, 64 transitions, 146 flow [2023-12-09 14:52:48,427 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-09 14:52:48,428 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;@1082e076, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-09 14:52:48,428 INFO L363 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-12-09 14:52:48,430 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-09 14:52:48,430 INFO L124 PetriNetUnfolderBase]: 2/40 cut-off events. [2023-12-09 14:52:48,430 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-09 14:52:48,430 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-09 14:52:48,431 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] [2023-12-09 14:52:48,431 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-12-09 14:52:48,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-09 14:52:48,431 INFO L85 PathProgramCache]: Analyzing trace with hash -228803117, now seen corresponding path program 1 times [2023-12-09 14:52:48,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-09 14:52:48,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565127823] [2023-12-09 14:52:48,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 14:52:48,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-09 14:52:48,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-09 14:52:48,461 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 14:52:48,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-09 14:52:48,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565127823] [2023-12-09 14:52:48,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565127823] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-09 14:52:48,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-09 14:52:48,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-09 14:52:48,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033080215] [2023-12-09 14:52:48,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-09 14:52:48,462 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-09 14:52:48,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-09 14:52:48,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-09 14:52:48,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-09 14:52:48,463 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 64 [2023-12-09 14:52:48,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 64 transitions, 146 flow. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 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 14:52:48,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-09 14:52:48,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 64 [2023-12-09 14:52:48,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-09 14:52:48,631 INFO L124 PetriNetUnfolderBase]: 627/1370 cut-off events. [2023-12-09 14:52:48,631 INFO L125 PetriNetUnfolderBase]: For 322/322 co-relation queries the response was YES. [2023-12-09 14:52:48,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2693 conditions, 1370 events. 627/1370 cut-off events. For 322/322 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 9036 event pairs, 355 based on Foata normal form. 617/1933 useless extension candidates. Maximal degree in co-relation 2133. Up to 757 conditions per place. [2023-12-09 14:52:48,645 INFO L140 encePairwiseOnDemand]: 49/64 looper letters, 32 selfloop transitions, 7 changer transitions 0/68 dead transitions. [2023-12-09 14:52:48,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 68 transitions, 244 flow [2023-12-09 14:52:48,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-09 14:52:48,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-09 14:52:48,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 154 transitions. [2023-12-09 14:52:48,651 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.8020833333333334 [2023-12-09 14:52:48,651 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 154 transitions. [2023-12-09 14:52:48,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 154 transitions. [2023-12-09 14:52:48,652 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-09 14:52:48,652 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 154 transitions. [2023-12-09 14:52:48,653 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 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 14:52:48,654 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 64.0) internal successors, (256), 4 states have internal predecessors, (256), 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 14:52:48,654 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 64.0) internal successors, (256), 4 states have internal predecessors, (256), 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 14:52:48,656 INFO L308 CegarLoopForPetriNet]: 67 programPoint places, -7 predicate places. [2023-12-09 14:52:48,656 INFO L500 AbstractCegarLoop]: Abstraction has has 60 places, 68 transitions, 244 flow [2023-12-09 14:52:48,656 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 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 14:52:48,656 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-09 14:52:48,656 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] [2023-12-09 14:52:48,656 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-09 14:52:48,657 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-12-09 14:52:48,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-09 14:52:48,657 INFO L85 PathProgramCache]: Analyzing trace with hash 490523184, now seen corresponding path program 1 times [2023-12-09 14:52:48,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-09 14:52:48,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614485024] [2023-12-09 14:52:48,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 14:52:48,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-09 14:52:48,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-09 14:52:48,736 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-09 14:52:48,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-09 14:52:48,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614485024] [2023-12-09 14:52:48,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614485024] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-09 14:52:48,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-09 14:52:48,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-09 14:52:48,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927410316] [2023-12-09 14:52:48,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-09 14:52:48,738 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-09 14:52:48,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-09 14:52:48,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-09 14:52:48,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-09 14:52:48,740 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 64 [2023-12-09 14:52:48,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 68 transitions, 244 flow. Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 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 14:52:48,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-09 14:52:48,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 64 [2023-12-09 14:52:48,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-09 14:52:48,776 INFO L124 PetriNetUnfolderBase]: 30/200 cut-off events. [2023-12-09 14:52:48,776 INFO L125 PetriNetUnfolderBase]: For 280/307 co-relation queries the response was YES. [2023-12-09 14:52:48,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 481 conditions, 200 events. 30/200 cut-off events. For 280/307 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 921 event pairs, 5 based on Foata normal form. 58/251 useless extension candidates. Maximal degree in co-relation 147. Up to 91 conditions per place. [2023-12-09 14:52:48,777 INFO L140 encePairwiseOnDemand]: 58/64 looper letters, 8 selfloop transitions, 6 changer transitions 0/49 dead transitions. [2023-12-09 14:52:48,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 49 transitions, 214 flow [2023-12-09 14:52:48,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-09 14:52:48,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-09 14:52:48,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 153 transitions. [2023-12-09 14:52:48,779 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.796875 [2023-12-09 14:52:48,779 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 153 transitions. [2023-12-09 14:52:48,779 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 153 transitions. [2023-12-09 14:52:48,779 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-09 14:52:48,780 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 153 transitions. [2023-12-09 14:52:48,781 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 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 14:52:48,782 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 64.0) internal successors, (256), 4 states have internal predecessors, (256), 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 14:52:48,784 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 64.0) internal successors, (256), 4 states have internal predecessors, (256), 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 14:52:48,786 INFO L308 CegarLoopForPetriNet]: 67 programPoint places, -11 predicate places. [2023-12-09 14:52:48,793 INFO L500 AbstractCegarLoop]: Abstraction has has 56 places, 49 transitions, 214 flow [2023-12-09 14:52:48,793 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 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 14:52:48,793 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-09 14:52:48,793 INFO L233 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-09 14:52:48,793 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-09 14:52:48,794 INFO L425 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-12-09 14:52:48,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-09 14:52:48,794 INFO L85 PathProgramCache]: Analyzing trace with hash -353841279, now seen corresponding path program 1 times [2023-12-09 14:52:48,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-09 14:52:48,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683325512] [2023-12-09 14:52:48,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 14:52:48,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-09 14:52:48,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-09 14:52:48,819 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-09 14:52:48,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-09 14:52:48,835 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-12-09 14:52:48,835 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-12-09 14:52:48,836 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-12-09 14:52:48,836 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-12-09 14:52:48,839 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-12-09 14:52:48,839 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-12-09 14:52:48,839 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-12-09 14:52:48,839 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-09 14:52:48,839 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-12-09 14:52:48,840 WARN L227 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-09 14:52:48,840 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-12-09 14:52:48,858 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-12-09 14:52:48,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 81 places, 77 transitions, 182 flow [2023-12-09 14:52:48,874 INFO L124 PetriNetUnfolderBase]: 9/127 cut-off events. [2023-12-09 14:52:48,875 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-12-09 14:52:48,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146 conditions, 127 events. 9/127 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 245 event pairs, 0 based on Foata normal form. 0/109 useless extension candidates. Maximal degree in co-relation 109. Up to 10 conditions per place. [2023-12-09 14:52:48,875 INFO L82 GeneralOperation]: Start removeDead. Operand has 81 places, 77 transitions, 182 flow [2023-12-09 14:52:48,876 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 81 places, 77 transitions, 182 flow [2023-12-09 14:52:48,877 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-09 14:52:48,883 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;@1082e076, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-09 14:52:48,883 INFO L363 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-12-09 14:52:48,885 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-09 14:52:48,885 INFO L124 PetriNetUnfolderBase]: 2/40 cut-off events. [2023-12-09 14:52:48,885 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-12-09 14:52:48,885 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-09 14:52:48,885 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] [2023-12-09 14:52:48,886 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-12-09 14:52:48,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-09 14:52:48,886 INFO L85 PathProgramCache]: Analyzing trace with hash 370408255, now seen corresponding path program 1 times [2023-12-09 14:52:48,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-09 14:52:48,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162436691] [2023-12-09 14:52:48,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 14:52:48,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-09 14:52:48,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-09 14:52:48,917 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 14:52:48,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-09 14:52:48,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162436691] [2023-12-09 14:52:48,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162436691] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-09 14:52:48,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-09 14:52:48,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-09 14:52:48,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576774036] [2023-12-09 14:52:48,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-09 14:52:48,918 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-09 14:52:48,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-09 14:52:48,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-09 14:52:48,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-09 14:52:48,919 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 77 [2023-12-09 14:52:48,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 77 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 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 14:52:48,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-09 14:52:48,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 77 [2023-12-09 14:52:48,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-09 14:52:50,070 INFO L124 PetriNetUnfolderBase]: 7843/13492 cut-off events. [2023-12-09 14:52:50,070 INFO L125 PetriNetUnfolderBase]: For 4465/4465 co-relation queries the response was YES. [2023-12-09 14:52:50,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27368 conditions, 13492 events. 7843/13492 cut-off events. For 4465/4465 co-relation queries the response was YES. Maximal size of possible extension queue 712. Compared 108211 event pairs, 4364 based on Foata normal form. 5507/18417 useless extension candidates. Maximal degree in co-relation 21779. Up to 7424 conditions per place. [2023-12-09 14:52:50,184 INFO L140 encePairwiseOnDemand]: 58/77 looper letters, 43 selfloop transitions, 9 changer transitions 0/85 dead transitions. [2023-12-09 14:52:50,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 85 transitions, 323 flow [2023-12-09 14:52:50,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-09 14:52:50,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-09 14:52:50,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 182 transitions. [2023-12-09 14:52:50,185 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7878787878787878 [2023-12-09 14:52:50,185 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 182 transitions. [2023-12-09 14:52:50,185 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 182 transitions. [2023-12-09 14:52:50,185 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-09 14:52:50,185 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 182 transitions. [2023-12-09 14:52:50,186 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 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 14:52:50,187 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 77.0) internal successors, (308), 4 states have internal predecessors, (308), 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 14:52:50,187 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 77.0) internal successors, (308), 4 states have internal predecessors, (308), 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 14:52:50,189 INFO L308 CegarLoopForPetriNet]: 81 programPoint places, -8 predicate places. [2023-12-09 14:52:50,189 INFO L500 AbstractCegarLoop]: Abstraction has has 73 places, 85 transitions, 323 flow [2023-12-09 14:52:50,189 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 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 14:52:50,189 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-09 14:52:50,189 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] [2023-12-09 14:52:50,190 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-09 14:52:50,190 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-12-09 14:52:50,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-09 14:52:50,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1244091324, now seen corresponding path program 1 times [2023-12-09 14:52:50,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-09 14:52:50,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665766831] [2023-12-09 14:52:50,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 14:52:50,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-09 14:52:50,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-09 14:52:50,279 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-09 14:52:50,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-09 14:52:50,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665766831] [2023-12-09 14:52:50,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665766831] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-09 14:52:50,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-09 14:52:50,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-09 14:52:50,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546674919] [2023-12-09 14:52:50,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-09 14:52:50,280 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-09 14:52:50,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-09 14:52:50,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-09 14:52:50,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-09 14:52:50,284 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 77 [2023-12-09 14:52:50,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 85 transitions, 323 flow. Second operand has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 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 14:52:50,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-09 14:52:50,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 77 [2023-12-09 14:52:50,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-09 14:52:50,337 INFO L124 PetriNetUnfolderBase]: 102/469 cut-off events. [2023-12-09 14:52:50,337 INFO L125 PetriNetUnfolderBase]: For 1210/1240 co-relation queries the response was YES. [2023-12-09 14:52:50,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1367 conditions, 469 events. 102/469 cut-off events. For 1210/1240 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3076 event pairs, 52 based on Foata normal form. 254/711 useless extension candidates. Maximal degree in co-relation 485. Up to 263 conditions per place. [2023-12-09 14:52:50,339 INFO L140 encePairwiseOnDemand]: 69/77 looper letters, 11 selfloop transitions, 8 changer transitions 0/60 dead transitions. [2023-12-09 14:52:50,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 60 transitions, 290 flow [2023-12-09 14:52:50,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-09 14:52:50,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-09 14:52:50,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 182 transitions. [2023-12-09 14:52:50,340 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7878787878787878 [2023-12-09 14:52:50,340 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 182 transitions. [2023-12-09 14:52:50,340 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 182 transitions. [2023-12-09 14:52:50,341 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-09 14:52:50,343 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 182 transitions. [2023-12-09 14:52:50,344 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 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 14:52:50,345 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 77.0) internal successors, (308), 4 states have internal predecessors, (308), 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 14:52:50,345 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 77.0) internal successors, (308), 4 states have internal predecessors, (308), 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 14:52:50,346 INFO L308 CegarLoopForPetriNet]: 81 programPoint places, -14 predicate places. [2023-12-09 14:52:50,346 INFO L500 AbstractCegarLoop]: Abstraction has has 67 places, 60 transitions, 290 flow [2023-12-09 14:52:50,347 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 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 14:52:50,347 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-09 14:52:50,347 INFO L233 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-09 14:52:50,347 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-09 14:52:50,347 INFO L425 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-12-09 14:52:50,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-09 14:52:50,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1242899960, now seen corresponding path program 1 times [2023-12-09 14:52:50,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-09 14:52:50,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387581768] [2023-12-09 14:52:50,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 14:52:50,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-09 14:52:50,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-09 14:52:50,363 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-09 14:52:50,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-09 14:52:50,378 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-12-09 14:52:50,378 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-12-09 14:52:50,379 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-12-09 14:52:50,379 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-12-09 14:52:50,379 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-12-09 14:52:50,379 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-12-09 14:52:50,379 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-12-09 14:52:50,379 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-12-09 14:52:50,379 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-12-09 14:52:50,379 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-12-09 14:52:50,380 WARN L227 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-09 14:52:50,380 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-12-09 14:52:50,399 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-12-09 14:52:50,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 95 places, 90 transitions, 220 flow [2023-12-09 14:52:50,412 INFO L124 PetriNetUnfolderBase]: 11/153 cut-off events. [2023-12-09 14:52:50,412 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-12-09 14:52:50,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179 conditions, 153 events. 11/153 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 305 event pairs, 0 based on Foata normal form. 0/131 useless extension candidates. Maximal degree in co-relation 140. Up to 12 conditions per place. [2023-12-09 14:52:50,413 INFO L82 GeneralOperation]: Start removeDead. Operand has 95 places, 90 transitions, 220 flow [2023-12-09 14:52:50,414 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 95 places, 90 transitions, 220 flow [2023-12-09 14:52:50,416 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-09 14:52:50,416 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;@1082e076, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-09 14:52:50,416 INFO L363 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-12-09 14:52:50,417 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-09 14:52:50,417 INFO L124 PetriNetUnfolderBase]: 2/39 cut-off events. [2023-12-09 14:52:50,418 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-09 14:52:50,418 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-09 14:52:50,418 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] [2023-12-09 14:52:50,418 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-12-09 14:52:50,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-09 14:52:50,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1514842507, now seen corresponding path program 1 times [2023-12-09 14:52:50,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-09 14:52:50,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807551902] [2023-12-09 14:52:50,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 14:52:50,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-09 14:52:50,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-09 14:52:50,447 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 14:52:50,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-09 14:52:50,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807551902] [2023-12-09 14:52:50,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807551902] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-09 14:52:50,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-09 14:52:50,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-09 14:52:50,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378517907] [2023-12-09 14:52:50,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-09 14:52:50,447 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-09 14:52:50,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-09 14:52:50,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-09 14:52:50,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-09 14:52:50,449 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 90 [2023-12-09 14:52:50,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 90 transitions, 220 flow. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 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 14:52:50,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-09 14:52:50,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 90 [2023-12-09 14:52:50,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-09 14:52:59,162 INFO L124 PetriNetUnfolderBase]: 82238/125510 cut-off events. [2023-12-09 14:52:59,162 INFO L125 PetriNetUnfolderBase]: For 54279/54279 co-relation queries the response was YES. [2023-12-09 14:52:59,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 258224 conditions, 125510 events. 82238/125510 cut-off events. For 54279/54279 co-relation queries the response was YES. Maximal size of possible extension queue 5123. Compared 1106804 event pairs, 42808 based on Foata normal form. 46526/165440 useless extension candidates. Maximal degree in co-relation 88613. Up to 67130 conditions per place. [2023-12-09 14:53:00,494 INFO L140 encePairwiseOnDemand]: 67/90 looper letters, 54 selfloop transitions, 11 changer transitions 0/102 dead transitions. [2023-12-09 14:53:00,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 102 transitions, 406 flow [2023-12-09 14:53:00,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-09 14:53:00,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-09 14:53:00,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 210 transitions. [2023-12-09 14:53:00,495 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7777777777777778 [2023-12-09 14:53:00,495 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 210 transitions. [2023-12-09 14:53:00,495 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 210 transitions. [2023-12-09 14:53:00,496 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-09 14:53:00,496 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 210 transitions. [2023-12-09 14:53:00,497 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 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 14:53:00,498 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 90.0) internal successors, (360), 4 states have internal predecessors, (360), 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 14:53:00,499 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 90.0) internal successors, (360), 4 states have internal predecessors, (360), 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 14:53:00,500 INFO L308 CegarLoopForPetriNet]: 95 programPoint places, -9 predicate places. [2023-12-09 14:53:00,500 INFO L500 AbstractCegarLoop]: Abstraction has has 86 places, 102 transitions, 406 flow [2023-12-09 14:53:00,500 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 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 14:53:00,500 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-09 14:53:00,500 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] [2023-12-09 14:53:00,500 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-09 14:53:00,500 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-12-09 14:53:00,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-09 14:53:00,501 INFO L85 PathProgramCache]: Analyzing trace with hash 689440514, now seen corresponding path program 1 times [2023-12-09 14:53:00,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-09 14:53:00,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573281741] [2023-12-09 14:53:00,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 14:53:00,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-09 14:53:00,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-09 14:53:00,535 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-09 14:53:00,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-09 14:53:00,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573281741] [2023-12-09 14:53:00,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573281741] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-09 14:53:00,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-09 14:53:00,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-09 14:53:00,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137973301] [2023-12-09 14:53:00,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-09 14:53:00,536 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-09 14:53:00,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-09 14:53:00,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-09 14:53:00,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-09 14:53:00,537 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 90 [2023-12-09 14:53:00,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 102 transitions, 406 flow. Second operand has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 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 14:53:00,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-09 14:53:00,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 90 [2023-12-09 14:53:00,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-09 14:53:00,648 INFO L124 PetriNetUnfolderBase]: 294/1111 cut-off events. [2023-12-09 14:53:00,649 INFO L125 PetriNetUnfolderBase]: For 4505/4555 co-relation queries the response was YES. [2023-12-09 14:53:00,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3722 conditions, 1111 events. 294/1111 cut-off events. For 4505/4555 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 9229 event pairs, 167 based on Foata normal form. 898/1989 useless extension candidates. Maximal degree in co-relation 1432. Up to 695 conditions per place. [2023-12-09 14:53:00,656 INFO L140 encePairwiseOnDemand]: 80/90 looper letters, 14 selfloop transitions, 10 changer transitions 0/71 dead transitions. [2023-12-09 14:53:00,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 71 transitions, 372 flow [2023-12-09 14:53:00,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-09 14:53:00,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-09 14:53:00,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 211 transitions. [2023-12-09 14:53:00,657 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7814814814814814 [2023-12-09 14:53:00,657 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 211 transitions. [2023-12-09 14:53:00,657 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 211 transitions. [2023-12-09 14:53:00,657 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-09 14:53:00,657 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 211 transitions. [2023-12-09 14:53:00,658 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 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 14:53:00,658 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 90.0) internal successors, (360), 4 states have internal predecessors, (360), 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 14:53:00,658 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 90.0) internal successors, (360), 4 states have internal predecessors, (360), 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 14:53:00,659 INFO L308 CegarLoopForPetriNet]: 95 programPoint places, -17 predicate places. [2023-12-09 14:53:00,660 INFO L500 AbstractCegarLoop]: Abstraction has has 78 places, 71 transitions, 372 flow [2023-12-09 14:53:00,660 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 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 14:53:00,660 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-09 14:53:00,660 INFO L233 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-09 14:53:00,660 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-12-09 14:53:00,660 INFO L425 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-12-09 14:53:00,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-09 14:53:00,661 INFO L85 PathProgramCache]: Analyzing trace with hash -552253497, now seen corresponding path program 1 times [2023-12-09 14:53:00,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-09 14:53:00,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082007833] [2023-12-09 14:53:00,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 14:53:00,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-09 14:53:00,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-09 14:53:00,676 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-09 14:53:00,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-09 14:53:00,697 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-12-09 14:53:00,697 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-12-09 14:53:00,698 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-12-09 14:53:00,698 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2023-12-09 14:53:00,698 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2023-12-09 14:53:00,698 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2023-12-09 14:53:00,698 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2023-12-09 14:53:00,698 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2023-12-09 14:53:00,698 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2023-12-09 14:53:00,698 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-12-09 14:53:00,698 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-12-09 14:53:00,701 WARN L227 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-09 14:53:00,701 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-12-09 14:53:00,723 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-12-09 14:53:00,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 103 transitions, 260 flow [2023-12-09 14:53:00,737 INFO L124 PetriNetUnfolderBase]: 13/179 cut-off events. [2023-12-09 14:53:00,737 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2023-12-09 14:53:00,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213 conditions, 179 events. 13/179 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 366 event pairs, 0 based on Foata normal form. 0/153 useless extension candidates. Maximal degree in co-relation 172. Up to 14 conditions per place. [2023-12-09 14:53:00,738 INFO L82 GeneralOperation]: Start removeDead. Operand has 109 places, 103 transitions, 260 flow [2023-12-09 14:53:00,740 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 109 places, 103 transitions, 260 flow [2023-12-09 14:53:00,741 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-09 14:53:00,741 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;@1082e076, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-09 14:53:00,741 INFO L363 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-12-09 14:53:00,743 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-09 14:53:00,743 INFO L124 PetriNetUnfolderBase]: 2/39 cut-off events. [2023-12-09 14:53:00,743 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-09 14:53:00,743 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-09 14:53:00,743 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] [2023-12-09 14:53:00,743 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2023-12-09 14:53:00,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-09 14:53:00,743 INFO L85 PathProgramCache]: Analyzing trace with hash -25463241, now seen corresponding path program 1 times [2023-12-09 14:53:00,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-09 14:53:00,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502093241] [2023-12-09 14:53:00,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 14:53:00,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-09 14:53:00,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-09 14:53:00,765 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 14:53:00,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-09 14:53:00,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502093241] [2023-12-09 14:53:00,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502093241] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-09 14:53:00,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-09 14:53:00,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-09 14:53:00,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532432780] [2023-12-09 14:53:00,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-09 14:53:00,766 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-09 14:53:00,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-09 14:53:00,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-09 14:53:00,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-09 14:53:00,767 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 103 [2023-12-09 14:53:00,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 103 transitions, 260 flow. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 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 14:53:00,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-09 14:53:00,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 103 [2023-12-09 14:53:00,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand