/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 -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf --rcfgbuilder.only.consider.context.switches.at.boundaries.of.atomic.blocks true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-ext/03_incdec.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 11:17:45,515 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 11:17:45,576 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-SemanticLbe.epf [2023-11-17 11:17:45,617 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 11:17:45,618 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 11:17:45,618 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 11:17:45,619 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 11:17:45,619 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 11:17:45,620 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 11:17:45,623 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 11:17:45,624 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 11:17:45,624 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 11:17:45,624 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 11:17:45,625 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 11:17:45,626 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 11:17:45,626 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 11:17:45,626 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 11:17:45,626 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 11:17:45,626 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 11:17:45,627 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 11:17:45,627 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 11:17:45,628 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 11:17:45,628 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 11:17:45,628 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 11:17:45,628 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 11:17:45,628 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 11:17:45,629 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 11:17:45,629 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 11:17:45,629 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 11:17:45,629 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 11:17:45,630 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 11:17:45,630 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 11:17:45,630 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Only consider context switches at boundaries of atomic blocks -> true [2023-11-17 11:17:45,847 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 11:17:45,870 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 11:17:45,873 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 11:17:45,874 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 11:17:45,874 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 11:17:45,875 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/03_incdec.i [2023-11-17 11:17:47,198 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 11:17:47,434 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 11:17:47,435 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/03_incdec.i [2023-11-17 11:17:47,446 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/988704728/7313a5c5cc6a4a67bb01e3f58849a766/FLAG02a17594e [2023-11-17 11:17:47,458 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/988704728/7313a5c5cc6a4a67bb01e3f58849a766 [2023-11-17 11:17:47,460 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 11:17:47,461 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 11:17:47,462 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 11:17:47,463 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 11:17:47,466 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 11:17:47,467 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 11:17:47" (1/1) ... [2023-11-17 11:17:47,468 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3326dc60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:17:47, skipping insertion in model container [2023-11-17 11:17:47,468 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 11:17:47" (1/1) ... [2023-11-17 11:17:47,509 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 11:17:47,807 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/03_incdec.i[30534,30547] [2023-11-17 11:17:47,817 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/03_incdec.i[30928,30941] [2023-11-17 11:17:47,825 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 11:17:47,836 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 11:17:47,886 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/03_incdec.i[30534,30547] [2023-11-17 11:17:47,888 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/03_incdec.i[30928,30941] [2023-11-17 11:17:47,891 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 11:17:47,922 INFO L206 MainTranslator]: Completed translation [2023-11-17 11:17:47,922 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:17:47 WrapperNode [2023-11-17 11:17:47,923 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 11:17:47,924 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 11:17:47,924 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 11:17:47,924 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 11:17:47,930 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:17:47" (1/1) ... [2023-11-17 11:17:47,943 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:17:47" (1/1) ... [2023-11-17 11:17:47,963 INFO L138 Inliner]: procedures = 172, calls = 24, calls flagged for inlining = 16, calls inlined = 24, statements flattened = 133 [2023-11-17 11:17:47,964 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 11:17:47,964 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 11:17:47,965 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 11:17:47,965 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 11:17:47,972 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:17:47" (1/1) ... [2023-11-17 11:17:47,972 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:17:47" (1/1) ... [2023-11-17 11:17:47,975 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:17:47" (1/1) ... [2023-11-17 11:17:47,975 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:17:47" (1/1) ... [2023-11-17 11:17:47,981 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:17:47" (1/1) ... [2023-11-17 11:17:47,984 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:17:47" (1/1) ... [2023-11-17 11:17:47,986 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:17:47" (1/1) ... [2023-11-17 11:17:47,987 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:17:47" (1/1) ... [2023-11-17 11:17:47,990 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 11:17:47,991 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 11:17:47,991 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 11:17:47,991 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 11:17:47,992 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:17:47" (1/1) ... [2023-11-17 11:17:48,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 11:17:48,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:17:48,030 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) [2023-11-17 11:17:48,053 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 [2023-11-17 11:17:48,060 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-17 11:17:48,060 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-17 11:17:48,060 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 11:17:48,060 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 11:17:48,061 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 11:17:48,061 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 11:17:48,061 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 11:17:48,061 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 11:17:48,061 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 11:17:48,062 WARN L211 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-17 11:17:48,164 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 11:17:48,165 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 11:17:48,362 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 11:17:48,588 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 11:17:48,588 INFO L307 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-17 11:17:48,590 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 11:17:48 BoogieIcfgContainer [2023-11-17 11:17:48,590 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 11:17:48,592 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 11:17:48,592 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 11:17:48,594 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 11:17:48,594 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 11:17:47" (1/3) ... [2023-11-17 11:17:48,595 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36bba508 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 11:17:48, skipping insertion in model container [2023-11-17 11:17:48,595 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:17:47" (2/3) ... [2023-11-17 11:17:48,595 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36bba508 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 11:17:48, skipping insertion in model container [2023-11-17 11:17:48,596 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 11:17:48" (3/3) ... [2023-11-17 11:17:48,600 INFO L112 eAbstractionObserver]: Analyzing ICFG 03_incdec.i [2023-11-17 11:17:48,616 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 11:17:48,616 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-17 11:17:48,616 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 11:17:48,683 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:17:48,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 36 places, 38 transitions, 80 flow [2023-11-17 11:17:48,734 INFO L124 PetriNetUnfolderBase]: 5/40 cut-off events. [2023-11-17 11:17:48,735 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:17:48,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44 conditions, 40 events. 5/40 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 100 event pairs, 0 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 35. Up to 2 conditions per place. [2023-11-17 11:17:48,738 INFO L82 GeneralOperation]: Start removeDead. Operand has 36 places, 38 transitions, 80 flow [2023-11-17 11:17:48,743 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 36 places, 38 transitions, 80 flow [2023-11-17 11:17:48,746 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:17:48,763 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 36 places, 38 transitions, 80 flow [2023-11-17 11:17:48,766 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 36 places, 38 transitions, 80 flow [2023-11-17 11:17:48,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 36 places, 38 transitions, 80 flow [2023-11-17 11:17:48,789 INFO L124 PetriNetUnfolderBase]: 5/40 cut-off events. [2023-11-17 11:17:48,789 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:17:48,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44 conditions, 40 events. 5/40 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 100 event pairs, 0 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 35. Up to 2 conditions per place. [2023-11-17 11:17:48,790 INFO L119 LiptonReduction]: Number of co-enabled transitions 256 [2023-11-17 11:17:51,163 INFO L134 LiptonReduction]: Checked pairs total: 374 [2023-11-17 11:17:51,164 INFO L136 LiptonReduction]: Total number of compositions: 50 [2023-11-17 11:17:51,177 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:17:51,186 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=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;@37e876e8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:17:51,187 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-17 11:17:51,190 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:17:51,190 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2023-11-17 11:17:51,190 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:17:51,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:17:51,191 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 11:17:51,191 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 11:17:51,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:17:51,198 INFO L85 PathProgramCache]: Analyzing trace with hash 13833943, now seen corresponding path program 1 times [2023-11-17 11:17:51,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:17:51,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809783350] [2023-11-17 11:17:51,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:17:51,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:17:51,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:17:51,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:17:51,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:17:51,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809783350] [2023-11-17 11:17:51,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809783350] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:17:51,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:17:51,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 11:17:51,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921445377] [2023-11-17 11:17:51,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:17:51,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-17 11:17:51,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:17:51,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-17 11:17:51,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-17 11:17:51,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 88 [2023-11-17 11:17:51,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 12 places, 9 transitions, 22 flow. Second operand has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 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) [2023-11-17 11:17:51,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:17:51,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 88 [2023-11-17 11:17:51,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:17:51,442 INFO L124 PetriNetUnfolderBase]: 2/11 cut-off events. [2023-11-17 11:17:51,443 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:17:51,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26 conditions, 11 events. 2/11 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 9 event pairs, 2 based on Foata normal form. 0/11 useless extension candidates. Maximal degree in co-relation 14. Up to 11 conditions per place. [2023-11-17 11:17:51,444 INFO L140 encePairwiseOnDemand]: 85/88 looper letters, 5 selfloop transitions, 0 changer transitions 0/6 dead transitions. [2023-11-17 11:17:51,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 10 places, 6 transitions, 26 flow [2023-11-17 11:17:51,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-17 11:17:51,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-17 11:17:51,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 34 transitions. [2023-11-17 11:17:51,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.19318181818181818 [2023-11-17 11:17:51,456 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 34 transitions. [2023-11-17 11:17:51,456 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 34 transitions. [2023-11-17 11:17:51,457 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:17:51,459 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 34 transitions. [2023-11-17 11:17:51,461 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 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) [2023-11-17 11:17:51,468 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 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) [2023-11-17 11:17:51,468 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 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) [2023-11-17 11:17:51,470 INFO L175 Difference]: Start difference. First operand has 12 places, 9 transitions, 22 flow. Second operand 2 states and 34 transitions. [2023-11-17 11:17:51,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 10 places, 6 transitions, 26 flow [2023-11-17 11:17:51,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 10 places, 6 transitions, 26 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 11:17:51,474 INFO L231 Difference]: Finished difference. Result has 10 places, 6 transitions, 16 flow [2023-11-17 11:17:51,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=16, PETRI_DIFFERENCE_MINUEND_PLACES=9, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=16, PETRI_PLACES=10, PETRI_TRANSITIONS=6} [2023-11-17 11:17:51,480 INFO L281 CegarLoopForPetriNet]: 12 programPoint places, -2 predicate places. [2023-11-17 11:17:51,480 INFO L495 AbstractCegarLoop]: Abstraction has has 10 places, 6 transitions, 16 flow [2023-11-17 11:17:51,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 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) [2023-11-17 11:17:51,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:17:51,482 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-17 11:17:51,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 11:17:51,482 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 11:17:51,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:17:51,485 INFO L85 PathProgramCache]: Analyzing trace with hash 409445595, now seen corresponding path program 1 times [2023-11-17 11:17:51,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:17:51,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019623384] [2023-11-17 11:17:51,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:17:51,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:17:51,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:17:51,515 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:17:51,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:17:51,566 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:17:51,567 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:17:51,568 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-17 11:17:51,570 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-17 11:17:51,571 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-17 11:17:51,571 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-17 11:17:51,571 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-17 11:17:51,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 11:17:51,571 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 11:17:51,574 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:17:51,575 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-17 11:17:51,606 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:17:51,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 71 transitions, 152 flow [2023-11-17 11:17:51,631 INFO L124 PetriNetUnfolderBase]: 10/76 cut-off events. [2023-11-17 11:17:51,632 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 11:17:51,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84 conditions, 76 events. 10/76 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 270 event pairs, 0 based on Foata normal form. 0/59 useless extension candidates. Maximal degree in co-relation 67. Up to 3 conditions per place. [2023-11-17 11:17:51,634 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 71 transitions, 152 flow [2023-11-17 11:17:51,635 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 66 places, 71 transitions, 152 flow [2023-11-17 11:17:51,635 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:17:51,635 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 66 places, 71 transitions, 152 flow [2023-11-17 11:17:51,635 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 66 places, 71 transitions, 152 flow [2023-11-17 11:17:51,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 71 transitions, 152 flow [2023-11-17 11:17:51,656 INFO L124 PetriNetUnfolderBase]: 10/76 cut-off events. [2023-11-17 11:17:51,656 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 11:17:51,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84 conditions, 76 events. 10/76 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 270 event pairs, 0 based on Foata normal form. 0/59 useless extension candidates. Maximal degree in co-relation 67. Up to 3 conditions per place. [2023-11-17 11:17:51,664 INFO L119 LiptonReduction]: Number of co-enabled transitions 2624 [2023-11-17 11:17:53,793 INFO L134 LiptonReduction]: Checked pairs total: 13842 [2023-11-17 11:17:53,793 INFO L136 LiptonReduction]: Total number of compositions: 71 [2023-11-17 11:17:53,795 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:17:53,796 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=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;@37e876e8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:17:53,796 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-17 11:17:53,802 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:17:53,802 INFO L124 PetriNetUnfolderBase]: 3/21 cut-off events. [2023-11-17 11:17:53,803 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 11:17:53,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:17:53,803 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:17:53,803 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-17 11:17:53,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:17:53,803 INFO L85 PathProgramCache]: Analyzing trace with hash -860709258, now seen corresponding path program 1 times [2023-11-17 11:17:53,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:17:53,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116931574] [2023-11-17 11:17:53,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:17:53,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:17:53,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:17:54,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:17:54,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:17:54,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116931574] [2023-11-17 11:17:54,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116931574] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:17:54,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:17:54,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:17:54,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464381371] [2023-11-17 11:17:54,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:17:54,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 11:17:54,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:17:54,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 11:17:54,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 11:17:54,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 142 [2023-11-17 11:17:54,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 41 transitions, 92 flow. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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) [2023-11-17 11:17:54,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:17:54,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 142 [2023-11-17 11:17:54,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:17:54,300 INFO L124 PetriNetUnfolderBase]: 674/1109 cut-off events. [2023-11-17 11:17:54,300 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2023-11-17 11:17:54,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2247 conditions, 1109 events. 674/1109 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 5043 event pairs, 225 based on Foata normal form. 0/920 useless extension candidates. Maximal degree in co-relation 1204. Up to 648 conditions per place. [2023-11-17 11:17:54,308 INFO L140 encePairwiseOnDemand]: 129/142 looper letters, 61 selfloop transitions, 6 changer transitions 0/68 dead transitions. [2023-11-17 11:17:54,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 68 transitions, 290 flow [2023-11-17 11:17:54,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 11:17:54,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 11:17:54,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 129 transitions. [2023-11-17 11:17:54,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.22711267605633803 [2023-11-17 11:17:54,311 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 129 transitions. [2023-11-17 11:17:54,311 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 129 transitions. [2023-11-17 11:17:54,311 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:17:54,311 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 129 transitions. [2023-11-17 11:17:54,312 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 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) [2023-11-17 11:17:54,314 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 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) [2023-11-17 11:17:54,314 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 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) [2023-11-17 11:17:54,314 INFO L175 Difference]: Start difference. First operand has 38 places, 41 transitions, 92 flow. Second operand 4 states and 129 transitions. [2023-11-17 11:17:54,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 68 transitions, 290 flow [2023-11-17 11:17:54,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 68 transitions, 290 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 11:17:54,317 INFO L231 Difference]: Finished difference. Result has 42 places, 42 transitions, 131 flow [2023-11-17 11:17:54,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=131, PETRI_PLACES=42, PETRI_TRANSITIONS=42} [2023-11-17 11:17:54,318 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 4 predicate places. [2023-11-17 11:17:54,318 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 42 transitions, 131 flow [2023-11-17 11:17:54,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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) [2023-11-17 11:17:54,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:17:54,318 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2023-11-17 11:17:54,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 11:17:54,319 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-17 11:17:54,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:17:54,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1510239721, now seen corresponding path program 1 times [2023-11-17 11:17:54,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:17:54,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681943585] [2023-11-17 11:17:54,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:17:54,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:17:54,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:17:54,331 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:17:54,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:17:54,341 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:17:54,341 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:17:54,342 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-11-17 11:17:54,342 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2023-11-17 11:17:54,342 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2023-11-17 11:17:54,342 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2023-11-17 11:17:54,342 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2023-11-17 11:17:54,343 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2023-11-17 11:17:54,343 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2023-11-17 11:17:54,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 11:17:54,343 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 11:17:54,344 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:17:54,344 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-17 11:17:54,371 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:17:54,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 96 places, 104 transitions, 226 flow [2023-11-17 11:17:54,383 INFO L124 PetriNetUnfolderBase]: 15/112 cut-off events. [2023-11-17 11:17:54,383 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-17 11:17:54,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125 conditions, 112 events. 15/112 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 462 event pairs, 0 based on Foata normal form. 0/87 useless extension candidates. Maximal degree in co-relation 99. Up to 4 conditions per place. [2023-11-17 11:17:54,385 INFO L82 GeneralOperation]: Start removeDead. Operand has 96 places, 104 transitions, 226 flow [2023-11-17 11:17:54,386 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 96 places, 104 transitions, 226 flow [2023-11-17 11:17:54,386 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:17:54,386 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 96 places, 104 transitions, 226 flow [2023-11-17 11:17:54,387 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 96 places, 104 transitions, 226 flow [2023-11-17 11:17:54,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 96 places, 104 transitions, 226 flow [2023-11-17 11:17:54,396 INFO L124 PetriNetUnfolderBase]: 15/112 cut-off events. [2023-11-17 11:17:54,397 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-17 11:17:54,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125 conditions, 112 events. 15/112 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 462 event pairs, 0 based on Foata normal form. 0/87 useless extension candidates. Maximal degree in co-relation 99. Up to 4 conditions per place. [2023-11-17 11:17:54,401 INFO L119 LiptonReduction]: Number of co-enabled transitions 7104 [2023-11-17 11:17:57,871 INFO L134 LiptonReduction]: Checked pairs total: 40031 [2023-11-17 11:17:57,871 INFO L136 LiptonReduction]: Total number of compositions: 107 [2023-11-17 11:17:57,874 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:17:57,879 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=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;@37e876e8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:17:57,879 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2023-11-17 11:17:57,882 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:17:57,882 INFO L124 PetriNetUnfolderBase]: 4/27 cut-off events. [2023-11-17 11:17:57,882 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 11:17:57,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:17:57,883 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:17:57,883 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err1ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-11-17 11:17:57,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:17:57,883 INFO L85 PathProgramCache]: Analyzing trace with hash 746849643, now seen corresponding path program 1 times [2023-11-17 11:17:57,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:17:57,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716448281] [2023-11-17 11:17:57,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:17:57,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:17:57,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:17:57,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:17:57,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:17:57,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716448281] [2023-11-17 11:17:57,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716448281] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:17:57,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:17:57,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:17:57,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863751555] [2023-11-17 11:17:57,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:17:57,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:17:57,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:17:57,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:17:57,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:17:57,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 211 [2023-11-17 11:17:57,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 59 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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) [2023-11-17 11:17:57,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:17:57,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 211 [2023-11-17 11:17:57,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:18:00,244 INFO L124 PetriNetUnfolderBase]: 19335/26227 cut-off events. [2023-11-17 11:18:00,244 INFO L125 PetriNetUnfolderBase]: For 912/912 co-relation queries the response was YES. [2023-11-17 11:18:00,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53031 conditions, 26227 events. 19335/26227 cut-off events. For 912/912 co-relation queries the response was YES. Maximal size of possible extension queue 1164. Compared 142759 event pairs, 6980 based on Foata normal form. 0/19858 useless extension candidates. Maximal degree in co-relation 12314. Up to 24833 conditions per place. [2023-11-17 11:18:00,425 INFO L140 encePairwiseOnDemand]: 197/211 looper letters, 69 selfloop transitions, 4 changer transitions 0/74 dead transitions. [2023-11-17 11:18:00,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 74 transitions, 324 flow [2023-11-17 11:18:00,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:18:00,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:18:00,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 144 transitions. [2023-11-17 11:18:00,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.22748815165876776 [2023-11-17 11:18:00,428 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 144 transitions. [2023-11-17 11:18:00,428 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 144 transitions. [2023-11-17 11:18:00,428 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:18:00,429 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 144 transitions. [2023-11-17 11:18:00,429 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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) [2023-11-17 11:18:00,431 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 211.0) internal successors, (844), 4 states have internal predecessors, (844), 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) [2023-11-17 11:18:00,431 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 211.0) internal successors, (844), 4 states have internal predecessors, (844), 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) [2023-11-17 11:18:00,431 INFO L175 Difference]: Start difference. First operand has 54 places, 59 transitions, 136 flow. Second operand 3 states and 144 transitions. [2023-11-17 11:18:00,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 74 transitions, 324 flow [2023-11-17 11:18:00,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 74 transitions, 320 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-11-17 11:18:00,435 INFO L231 Difference]: Finished difference. Result has 56 places, 58 transitions, 162 flow [2023-11-17 11:18:00,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=162, PETRI_PLACES=56, PETRI_TRANSITIONS=58} [2023-11-17 11:18:00,436 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 2 predicate places. [2023-11-17 11:18:00,436 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 58 transitions, 162 flow [2023-11-17 11:18:00,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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) [2023-11-17 11:18:00,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:18:00,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:18:00,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 11:18:00,437 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-11-17 11:18:00,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:18:00,438 INFO L85 PathProgramCache]: Analyzing trace with hash 746821841, now seen corresponding path program 1 times [2023-11-17 11:18:00,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:18:00,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045233882] [2023-11-17 11:18:00,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:18:00,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:18:00,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:18:00,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:18:00,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:18:00,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045233882] [2023-11-17 11:18:00,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045233882] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:18:00,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:18:00,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:18:00,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362820157] [2023-11-17 11:18:00,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:18:00,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 11:18:00,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:18:00,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 11:18:00,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 11:18:00,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 211 [2023-11-17 11:18:00,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 58 transitions, 162 flow. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 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) [2023-11-17 11:18:00,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:18:00,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 211 [2023-11-17 11:18:00,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:18:02,680 INFO L124 PetriNetUnfolderBase]: 19497/26656 cut-off events. [2023-11-17 11:18:02,681 INFO L125 PetriNetUnfolderBase]: For 2238/2238 co-relation queries the response was YES. [2023-11-17 11:18:02,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57325 conditions, 26656 events. 19497/26656 cut-off events. For 2238/2238 co-relation queries the response was YES. Maximal size of possible extension queue 1184. Compared 148727 event pairs, 5603 based on Foata normal form. 189/21769 useless extension candidates. Maximal degree in co-relation 31342. Up to 20426 conditions per place. [2023-11-17 11:18:02,840 INFO L140 encePairwiseOnDemand]: 201/211 looper letters, 102 selfloop transitions, 8 changer transitions 0/111 dead transitions. [2023-11-17 11:18:02,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 111 transitions, 520 flow [2023-11-17 11:18:02,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 11:18:02,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 11:18:02,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 185 transitions. [2023-11-17 11:18:02,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.21919431279620852 [2023-11-17 11:18:02,845 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 185 transitions. [2023-11-17 11:18:02,845 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 185 transitions. [2023-11-17 11:18:02,845 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:18:02,845 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 185 transitions. [2023-11-17 11:18:02,846 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 46.25) internal successors, (185), 4 states have internal predecessors, (185), 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) [2023-11-17 11:18:02,850 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 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) [2023-11-17 11:18:02,850 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 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) [2023-11-17 11:18:02,850 INFO L175 Difference]: Start difference. First operand has 56 places, 58 transitions, 162 flow. Second operand 4 states and 185 transitions. [2023-11-17 11:18:02,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 111 transitions, 520 flow [2023-11-17 11:18:02,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 111 transitions, 516 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 11:18:02,863 INFO L231 Difference]: Finished difference. Result has 59 places, 61 transitions, 201 flow [2023-11-17 11:18:02,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=201, PETRI_PLACES=59, PETRI_TRANSITIONS=61} [2023-11-17 11:18:02,865 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 5 predicate places. [2023-11-17 11:18:02,865 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 61 transitions, 201 flow [2023-11-17 11:18:02,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 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) [2023-11-17 11:18:02,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:18:02,866 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:18:02,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-17 11:18:02,866 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-11-17 11:18:02,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:18:02,867 INFO L85 PathProgramCache]: Analyzing trace with hash -779502392, now seen corresponding path program 1 times [2023-11-17 11:18:02,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:18:02,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501425180] [2023-11-17 11:18:02,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:18:02,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:18:02,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:18:02,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 11:18:02,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:18:02,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501425180] [2023-11-17 11:18:02,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501425180] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:18:02,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:18:02,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:18:02,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035429530] [2023-11-17 11:18:02,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:18:02,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 11:18:02,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:18:02,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 11:18:02,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 11:18:02,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 211 [2023-11-17 11:18:02,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 61 transitions, 201 flow. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 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) [2023-11-17 11:18:02,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:18:02,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 211 [2023-11-17 11:18:02,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:18:05,089 INFO L124 PetriNetUnfolderBase]: 19839/27325 cut-off events. [2023-11-17 11:18:05,089 INFO L125 PetriNetUnfolderBase]: For 6985/6985 co-relation queries the response was YES. [2023-11-17 11:18:05,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61968 conditions, 27325 events. 19839/27325 cut-off events. For 6985/6985 co-relation queries the response was YES. Maximal size of possible extension queue 1215. Compared 155814 event pairs, 5675 based on Foata normal form. 153/23302 useless extension candidates. Maximal degree in co-relation 34534. Up to 21374 conditions per place. [2023-11-17 11:18:05,241 INFO L140 encePairwiseOnDemand]: 201/211 looper letters, 105 selfloop transitions, 9 changer transitions 0/115 dead transitions. [2023-11-17 11:18:05,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 115 transitions, 585 flow [2023-11-17 11:18:05,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 11:18:05,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 11:18:05,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 184 transitions. [2023-11-17 11:18:05,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.21800947867298578 [2023-11-17 11:18:05,245 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 184 transitions. [2023-11-17 11:18:05,245 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 184 transitions. [2023-11-17 11:18:05,245 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:18:05,245 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 184 transitions. [2023-11-17 11:18:05,246 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 46.0) internal successors, (184), 4 states have internal predecessors, (184), 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) [2023-11-17 11:18:05,247 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 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) [2023-11-17 11:18:05,248 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 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) [2023-11-17 11:18:05,248 INFO L175 Difference]: Start difference. First operand has 59 places, 61 transitions, 201 flow. Second operand 4 states and 184 transitions. [2023-11-17 11:18:05,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 115 transitions, 585 flow [2023-11-17 11:18:05,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 115 transitions, 581 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 11:18:05,256 INFO L231 Difference]: Finished difference. Result has 62 places, 65 transitions, 254 flow [2023-11-17 11:18:05,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=197, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=254, PETRI_PLACES=62, PETRI_TRANSITIONS=65} [2023-11-17 11:18:05,258 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 8 predicate places. [2023-11-17 11:18:05,258 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 65 transitions, 254 flow [2023-11-17 11:18:05,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 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) [2023-11-17 11:18:05,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:18:05,259 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2023-11-17 11:18:05,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-17 11:18:05,259 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-11-17 11:18:05,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:18:05,259 INFO L85 PathProgramCache]: Analyzing trace with hash -2126368678, now seen corresponding path program 1 times [2023-11-17 11:18:05,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:18:05,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135049670] [2023-11-17 11:18:05,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:18:05,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:18:05,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:18:05,277 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:18:05,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:18:05,292 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:18:05,292 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:18:05,292 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 9 remaining) [2023-11-17 11:18:05,294 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (7 of 9 remaining) [2023-11-17 11:18:05,294 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 9 remaining) [2023-11-17 11:18:05,298 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (5 of 9 remaining) [2023-11-17 11:18:05,298 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 9 remaining) [2023-11-17 11:18:05,298 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (3 of 9 remaining) [2023-11-17 11:18:05,298 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 9 remaining) [2023-11-17 11:18:05,299 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (1 of 9 remaining) [2023-11-17 11:18:05,299 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 9 remaining) [2023-11-17 11:18:05,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-17 11:18:05,299 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-17 11:18:05,300 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:18:05,300 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-17 11:18:05,334 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:18:05,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 126 places, 137 transitions, 302 flow [2023-11-17 11:18:05,352 INFO L124 PetriNetUnfolderBase]: 20/148 cut-off events. [2023-11-17 11:18:05,352 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-17 11:18:05,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167 conditions, 148 events. 20/148 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 640 event pairs, 0 based on Foata normal form. 0/115 useless extension candidates. Maximal degree in co-relation 131. Up to 5 conditions per place. [2023-11-17 11:18:05,353 INFO L82 GeneralOperation]: Start removeDead. Operand has 126 places, 137 transitions, 302 flow [2023-11-17 11:18:05,355 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 126 places, 137 transitions, 302 flow [2023-11-17 11:18:05,355 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:18:05,355 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 126 places, 137 transitions, 302 flow [2023-11-17 11:18:05,356 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 126 places, 137 transitions, 302 flow [2023-11-17 11:18:05,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 126 places, 137 transitions, 302 flow [2023-11-17 11:18:05,368 INFO L124 PetriNetUnfolderBase]: 20/148 cut-off events. [2023-11-17 11:18:05,368 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-17 11:18:05,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167 conditions, 148 events. 20/148 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 640 event pairs, 0 based on Foata normal form. 0/115 useless extension candidates. Maximal degree in co-relation 131. Up to 5 conditions per place. [2023-11-17 11:18:05,374 INFO L119 LiptonReduction]: Number of co-enabled transitions 13696 [2023-11-17 11:18:10,012 INFO L134 LiptonReduction]: Checked pairs total: 72456 [2023-11-17 11:18:10,013 INFO L136 LiptonReduction]: Total number of compositions: 136 [2023-11-17 11:18:10,015 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:18:10,018 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=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;@37e876e8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:18:10,019 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2023-11-17 11:18:10,021 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:18:10,021 INFO L124 PetriNetUnfolderBase]: 3/25 cut-off events. [2023-11-17 11:18:10,021 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 11:18:10,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:18:10,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:18:10,022 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 8 more)] === [2023-11-17 11:18:10,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:18:10,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1209215387, now seen corresponding path program 1 times [2023-11-17 11:18:10,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:18:10,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54408609] [2023-11-17 11:18:10,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:18:10,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:18:10,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:18:10,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:18:10,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:18:10,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54408609] [2023-11-17 11:18:10,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54408609] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:18:10,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:18:10,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:18:10,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337269136] [2023-11-17 11:18:10,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:18:10,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 11:18:10,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:18:10,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 11:18:10,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 11:18:10,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 273 [2023-11-17 11:18:10,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 77 transitions, 182 flow. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 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) [2023-11-17 11:18:10,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:18:10,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 273 [2023-11-17 11:18:10,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:18:39,909 INFO L124 PetriNetUnfolderBase]: 447517/560056 cut-off events. [2023-11-17 11:18:39,910 INFO L125 PetriNetUnfolderBase]: For 24833/24833 co-relation queries the response was YES. [2023-11-17 11:18:40,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1132347 conditions, 560056 events. 447517/560056 cut-off events. For 24833/24833 co-relation queries the response was YES. Maximal size of possible extension queue 17231. Compared 3358568 event pairs, 150291 based on Foata normal form. 0/417436 useless extension candidates. Maximal degree in co-relation 138396. Up to 508184 conditions per place. [2023-11-17 11:18:42,729 INFO L140 encePairwiseOnDemand]: 250/273 looper letters, 128 selfloop transitions, 9 changer transitions 0/138 dead transitions. [2023-11-17 11:18:42,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 138 transitions, 620 flow [2023-11-17 11:18:42,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 11:18:42,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 11:18:42,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 259 transitions. [2023-11-17 11:18:42,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.23717948717948717 [2023-11-17 11:18:42,731 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 259 transitions. [2023-11-17 11:18:42,731 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 259 transitions. [2023-11-17 11:18:42,732 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:18:42,732 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 259 transitions. [2023-11-17 11:18:42,732 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 64.75) internal successors, (259), 4 states have internal predecessors, (259), 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) [2023-11-17 11:18:42,735 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 273.0) internal successors, (1365), 5 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:18:42,735 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 273.0) internal successors, (1365), 5 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:18:42,735 INFO L175 Difference]: Start difference. First operand has 70 places, 77 transitions, 182 flow. Second operand 4 states and 259 transitions. [2023-11-17 11:18:42,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 138 transitions, 620 flow [2023-11-17 11:18:42,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 138 transitions, 602 flow, removed 9 selfloop flow, removed 0 redundant places. [2023-11-17 11:18:42,752 INFO L231 Difference]: Finished difference. Result has 74 places, 80 transitions, 250 flow [2023-11-17 11:18:42,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=250, PETRI_PLACES=74, PETRI_TRANSITIONS=80} [2023-11-17 11:18:42,754 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 4 predicate places. [2023-11-17 11:18:42,754 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 80 transitions, 250 flow [2023-11-17 11:18:42,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 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) [2023-11-17 11:18:42,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:18:42,754 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:18:42,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-17 11:18:42,754 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 8 more)] === [2023-11-17 11:18:42,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:18:42,755 INFO L85 PathProgramCache]: Analyzing trace with hash 319727959, now seen corresponding path program 1 times [2023-11-17 11:18:42,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:18:42,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982003389] [2023-11-17 11:18:42,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:18:42,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:18:42,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:18:42,839 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 11:18:42,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:18:42,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982003389] [2023-11-17 11:18:42,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982003389] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:18:42,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:18:42,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:18:42,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941461616] [2023-11-17 11:18:42,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:18:42,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 11:18:42,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:18:42,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 11:18:42,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 11:18:42,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 273 [2023-11-17 11:18:42,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 80 transitions, 250 flow. Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 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) [2023-11-17 11:18:42,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:18:42,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 273 [2023-11-17 11:18:42,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand