/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 -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-ext/46_monabsex2_vs.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 15:10:52,277 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 15:10:52,333 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 15:10:52,355 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 15:10:52,355 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 15:10:52,356 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 15:10:52,356 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 15:10:52,357 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 15:10:52,357 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 15:10:52,357 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 15:10:52,358 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 15:10:52,358 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 15:10:52,358 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 15:10:52,359 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 15:10:52,359 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 15:10:52,359 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 15:10:52,360 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 15:10:52,360 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 15:10:52,360 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 15:10:52,360 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 15:10:52,361 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 15:10:52,361 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 15:10:52,361 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 15:10:52,362 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 15:10:52,362 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 15:10:52,362 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 15:10:52,362 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 15:10:52,363 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 15:10:52,363 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 15:10:52,363 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 15:10:52,363 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 15:10:52,363 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 15:10:52,364 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-11-17 15:10:52,553 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 15:10:52,571 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 15:10:52,573 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 15:10:52,574 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 15:10:52,574 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 15:10:52,575 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/46_monabsex2_vs.i [2023-11-17 15:10:53,826 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 15:10:54,048 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 15:10:54,049 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/46_monabsex2_vs.i [2023-11-17 15:10:54,063 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/74c639a39/a1881e7ab80e4c5d9ab33fd6ed9956e6/FLAG2006bc0e2 [2023-11-17 15:10:54,078 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/74c639a39/a1881e7ab80e4c5d9ab33fd6ed9956e6 [2023-11-17 15:10:54,081 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 15:10:54,083 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 15:10:54,086 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 15:10:54,086 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 15:10:54,090 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 15:10:54,091 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:10:54" (1/1) ... [2023-11-17 15:10:54,092 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73d619fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:10:54, skipping insertion in model container [2023-11-17 15:10:54,092 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:10:54" (1/1) ... [2023-11-17 15:10:54,146 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 15:10:54,292 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-17 15:10:54,461 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/46_monabsex2_vs.i[30494,30507] [2023-11-17 15:10:54,473 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 15:10:54,486 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 15:10:54,511 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-17 15:10:54,533 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/46_monabsex2_vs.i[30494,30507] [2023-11-17 15:10:54,536 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 15:10:54,573 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 15:10:54,574 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 15:10:54,574 WARN L675 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 15:10:54,581 INFO L206 MainTranslator]: Completed translation [2023-11-17 15:10:54,582 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:10:54 WrapperNode [2023-11-17 15:10:54,583 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 15:10:54,584 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 15:10:54,584 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 15:10:54,584 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 15:10:54,590 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:10:54" (1/1) ... [2023-11-17 15:10:54,608 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:10:54" (1/1) ... [2023-11-17 15:10:54,623 INFO L138 Inliner]: procedures = 170, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 23 [2023-11-17 15:10:54,624 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 15:10:54,624 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 15:10:54,624 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 15:10:54,625 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 15:10:54,632 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:10:54" (1/1) ... [2023-11-17 15:10:54,632 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:10:54" (1/1) ... [2023-11-17 15:10:54,645 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:10:54" (1/1) ... [2023-11-17 15:10:54,646 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:10:54" (1/1) ... [2023-11-17 15:10:54,649 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:10:54" (1/1) ... [2023-11-17 15:10:54,652 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:10:54" (1/1) ... [2023-11-17 15:10:54,654 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:10:54" (1/1) ... [2023-11-17 15:10:54,654 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:10:54" (1/1) ... [2023-11-17 15:10:54,656 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 15:10:54,657 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 15:10:54,657 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 15:10:54,657 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 15:10:54,658 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:10:54" (1/1) ... [2023-11-17 15:10:54,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 15:10:54,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:10:54,691 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 15:10:54,697 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 15:10:54,714 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-17 15:10:54,715 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-17 15:10:54,715 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 15:10:54,716 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-17 15:10:54,716 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 15:10:54,716 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 15:10:54,716 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 15:10:54,716 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 15:10:54,716 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-17 15:10:54,716 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 15:10:54,716 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 15:10:54,718 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 15:10:54,815 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 15:10:54,817 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 15:10:54,893 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 15:10:54,925 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 15:10:54,925 INFO L307 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-17 15:10:54,927 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:10:54 BoogieIcfgContainer [2023-11-17 15:10:54,927 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 15:10:54,929 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 15:10:54,929 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 15:10:54,932 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 15:10:54,932 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 03:10:54" (1/3) ... [2023-11-17 15:10:54,932 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56db8ff7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:10:54, skipping insertion in model container [2023-11-17 15:10:54,933 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:10:54" (2/3) ... [2023-11-17 15:10:54,933 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56db8ff7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:10:54, skipping insertion in model container [2023-11-17 15:10:54,933 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:10:54" (3/3) ... [2023-11-17 15:10:54,934 INFO L112 eAbstractionObserver]: Analyzing ICFG 46_monabsex2_vs.i [2023-11-17 15:10:54,948 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 15:10:54,948 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 15:10:54,948 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 15:10:54,984 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:10:55,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 35 places, 34 transitions, 72 flow [2023-11-17 15:10:55,038 INFO L124 PetriNetUnfolderBase]: 3/45 cut-off events. [2023-11-17 15:10:55,039 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:10:55,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 45 events. 3/45 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 47 event pairs, 0 based on Foata normal form. 0/39 useless extension candidates. Maximal degree in co-relation 22. Up to 4 conditions per place. [2023-11-17 15:10:55,043 INFO L82 GeneralOperation]: Start removeDead. Operand has 35 places, 34 transitions, 72 flow [2023-11-17 15:10:55,047 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 35 places, 34 transitions, 72 flow [2023-11-17 15:10:55,050 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:10:55,062 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 35 places, 34 transitions, 72 flow [2023-11-17 15:10:55,065 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 35 places, 34 transitions, 72 flow [2023-11-17 15:10:55,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 35 places, 34 transitions, 72 flow [2023-11-17 15:10:55,077 INFO L124 PetriNetUnfolderBase]: 3/45 cut-off events. [2023-11-17 15:10:55,077 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:10:55,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 45 events. 3/45 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 47 event pairs, 0 based on Foata normal form. 0/39 useless extension candidates. Maximal degree in co-relation 22. Up to 4 conditions per place. [2023-11-17 15:10:55,079 INFO L119 LiptonReduction]: Number of co-enabled transitions 224 [2023-11-17 15:10:55,980 INFO L134 LiptonReduction]: Checked pairs total: 185 [2023-11-17 15:10:55,981 INFO L136 LiptonReduction]: Total number of compositions: 29 [2023-11-17 15:10:56,002 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:10:56,008 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;@153fbfe1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:10:56,008 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-17 15:10:56,011 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:10:56,012 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2023-11-17 15:10:56,012 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:10:56,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:10:56,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 15:10:56,013 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-17 15:10:56,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:10:56,017 INFO L85 PathProgramCache]: Analyzing trace with hash 4948577, now seen corresponding path program 1 times [2023-11-17 15:10:56,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:10:56,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711318056] [2023-11-17 15:10:56,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:10:56,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:10:56,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:10:56,269 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 15:10:56,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:10:56,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711318056] [2023-11-17 15:10:56,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711318056] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:10:56,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:10:56,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 15:10:56,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157267095] [2023-11-17 15:10:56,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:10:56,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:10:56,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:10:56,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:10:56,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:10:56,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 63 [2023-11-17 15:10:56,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 11 places, 8 transitions, 20 flow. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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 15:10:56,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:10:56,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 63 [2023-11-17 15:10:56,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:10:56,349 INFO L124 PetriNetUnfolderBase]: 2/11 cut-off events. [2023-11-17 15:10:56,349 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:10:56,350 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, 0 based on Foata normal form. 0/11 useless extension candidates. Maximal degree in co-relation 14. Up to 6 conditions per place. [2023-11-17 15:10:56,351 INFO L140 encePairwiseOnDemand]: 59/63 looper letters, 5 selfloop transitions, 2 changer transitions 0/8 dead transitions. [2023-11-17 15:10:56,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 11 places, 8 transitions, 34 flow [2023-11-17 15:10:56,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:10:56,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:10:56,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 88 transitions. [2023-11-17 15:10:56,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4656084656084656 [2023-11-17 15:10:56,364 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 88 transitions. [2023-11-17 15:10:56,364 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 88 transitions. [2023-11-17 15:10:56,365 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:10:56,367 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 88 transitions. [2023-11-17 15:10:56,371 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 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 15:10:56,378 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 63.0) internal successors, (252), 4 states have internal predecessors, (252), 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 15:10:56,379 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 63.0) internal successors, (252), 4 states have internal predecessors, (252), 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 15:10:56,380 INFO L175 Difference]: Start difference. First operand has 11 places, 8 transitions, 20 flow. Second operand 3 states and 88 transitions. [2023-11-17 15:10:56,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 11 places, 8 transitions, 34 flow [2023-11-17 15:10:56,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 11 places, 8 transitions, 34 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:10:56,385 INFO L231 Difference]: Finished difference. Result has 11 places, 6 transitions, 20 flow [2023-11-17 15:10:56,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=16, PETRI_DIFFERENCE_MINUEND_PLACES=9, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=4, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=20, PETRI_PLACES=11, PETRI_TRANSITIONS=6} [2023-11-17 15:10:56,390 INFO L281 CegarLoopForPetriNet]: 11 programPoint places, 0 predicate places. [2023-11-17 15:10:56,391 INFO L495 AbstractCegarLoop]: Abstraction has has 11 places, 6 transitions, 20 flow [2023-11-17 15:10:56,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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 15:10:56,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:10:56,391 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-17 15:10:56,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 15:10:56,392 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-17 15:10:56,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:10:56,393 INFO L85 PathProgramCache]: Analyzing trace with hash 460625873, now seen corresponding path program 1 times [2023-11-17 15:10:56,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:10:56,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100806897] [2023-11-17 15:10:56,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:10:56,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:10:56,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:10:56,411 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:10:56,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:10:56,438 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:10:56,439 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:10:56,440 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-11-17 15:10:56,442 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-11-17 15:10:56,442 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-11-17 15:10:56,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 15:10:56,442 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 15:10:56,445 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:10:56,445 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-17 15:10:56,459 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:10:56,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 45 places, 43 transitions, 96 flow [2023-11-17 15:10:56,482 INFO L124 PetriNetUnfolderBase]: 5/67 cut-off events. [2023-11-17 15:10:56,482 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 15:10:56,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75 conditions, 67 events. 5/67 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 90 event pairs, 0 based on Foata normal form. 0/57 useless extension candidates. Maximal degree in co-relation 46. Up to 6 conditions per place. [2023-11-17 15:10:56,483 INFO L82 GeneralOperation]: Start removeDead. Operand has 45 places, 43 transitions, 96 flow [2023-11-17 15:10:56,484 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 45 places, 43 transitions, 96 flow [2023-11-17 15:10:56,484 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:10:56,485 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 45 places, 43 transitions, 96 flow [2023-11-17 15:10:56,485 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 45 places, 43 transitions, 96 flow [2023-11-17 15:10:56,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 45 places, 43 transitions, 96 flow [2023-11-17 15:10:56,503 INFO L124 PetriNetUnfolderBase]: 5/67 cut-off events. [2023-11-17 15:10:56,503 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 15:10:56,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75 conditions, 67 events. 5/67 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 90 event pairs, 0 based on Foata normal form. 0/57 useless extension candidates. Maximal degree in co-relation 46. Up to 6 conditions per place. [2023-11-17 15:10:56,506 INFO L119 LiptonReduction]: Number of co-enabled transitions 592 [2023-11-17 15:10:57,229 INFO L134 LiptonReduction]: Checked pairs total: 1009 [2023-11-17 15:10:57,230 INFO L136 LiptonReduction]: Total number of compositions: 34 [2023-11-17 15:10:57,238 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:10:57,248 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;@153fbfe1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:10:57,248 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-17 15:10:57,250 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:10:57,250 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2023-11-17 15:10:57,250 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:10:57,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:10:57,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 15:10:57,251 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-17 15:10:57,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:10:57,251 INFO L85 PathProgramCache]: Analyzing trace with hash 7594859, now seen corresponding path program 1 times [2023-11-17 15:10:57,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:10:57,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046926582] [2023-11-17 15:10:57,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:10:57,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:10:57,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:10:57,367 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 15:10:57,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:10:57,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046926582] [2023-11-17 15:10:57,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046926582] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:10:57,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:10:57,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 15:10:57,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936065906] [2023-11-17 15:10:57,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:10:57,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:10:57,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:10:57,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:10:57,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:10:57,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 77 [2023-11-17 15:10:57,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 44 flow. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 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 15:10:57,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:10:57,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 77 [2023-11-17 15:10:57,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:10:57,411 INFO L124 PetriNetUnfolderBase]: 22/66 cut-off events. [2023-11-17 15:10:57,412 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-11-17 15:10:57,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133 conditions, 66 events. 22/66 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 211 event pairs, 7 based on Foata normal form. 0/59 useless extension candidates. Maximal degree in co-relation 51. Up to 32 conditions per place. [2023-11-17 15:10:57,413 INFO L140 encePairwiseOnDemand]: 70/77 looper letters, 13 selfloop transitions, 3 changer transitions 0/21 dead transitions. [2023-11-17 15:10:57,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 21 transitions, 89 flow [2023-11-17 15:10:57,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:10:57,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:10:57,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 112 transitions. [2023-11-17 15:10:57,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48484848484848486 [2023-11-17 15:10:57,418 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 112 transitions. [2023-11-17 15:10:57,418 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 112 transitions. [2023-11-17 15:10:57,419 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:10:57,419 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 112 transitions. [2023-11-17 15:10:57,420 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 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 15:10:57,421 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 77.0) internal successors, (308), 4 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:10:57,421 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 77.0) internal successors, (308), 4 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:10:57,421 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 44 flow. Second operand 3 states and 112 transitions. [2023-11-17 15:10:57,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 21 transitions, 89 flow [2023-11-17 15:10:57,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 21 transitions, 89 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:10:57,422 INFO L231 Difference]: Finished difference. Result has 23 places, 17 transitions, 61 flow [2023-11-17 15:10:57,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=61, PETRI_PLACES=23, PETRI_TRANSITIONS=17} [2023-11-17 15:10:57,423 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 2 predicate places. [2023-11-17 15:10:57,423 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 17 transitions, 61 flow [2023-11-17 15:10:57,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 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 15:10:57,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:10:57,424 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-17 15:10:57,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 15:10:57,424 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-17 15:10:57,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:10:57,425 INFO L85 PathProgramCache]: Analyzing trace with hash -549133707, now seen corresponding path program 1 times [2023-11-17 15:10:57,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:10:57,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34182621] [2023-11-17 15:10:57,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:10:57,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:10:57,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:10:57,457 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:10:57,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:10:57,478 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:10:57,479 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:10:57,479 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-11-17 15:10:57,482 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-11-17 15:10:57,483 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-11-17 15:10:57,483 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-11-17 15:10:57,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 15:10:57,484 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 15:10:57,484 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:10:57,484 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-17 15:10:57,500 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:10:57,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 55 places, 52 transitions, 122 flow [2023-11-17 15:10:57,524 INFO L124 PetriNetUnfolderBase]: 7/89 cut-off events. [2023-11-17 15:10:57,525 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-17 15:10:57,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102 conditions, 89 events. 7/89 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 128 event pairs, 0 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 71. Up to 8 conditions per place. [2023-11-17 15:10:57,529 INFO L82 GeneralOperation]: Start removeDead. Operand has 55 places, 52 transitions, 122 flow [2023-11-17 15:10:57,530 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 52 transitions, 122 flow [2023-11-17 15:10:57,530 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:10:57,530 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 55 places, 52 transitions, 122 flow [2023-11-17 15:10:57,530 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 55 places, 52 transitions, 122 flow [2023-11-17 15:10:57,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 55 places, 52 transitions, 122 flow [2023-11-17 15:10:57,551 INFO L124 PetriNetUnfolderBase]: 7/89 cut-off events. [2023-11-17 15:10:57,551 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-17 15:10:57,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102 conditions, 89 events. 7/89 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 128 event pairs, 0 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 71. Up to 8 conditions per place. [2023-11-17 15:10:57,554 INFO L119 LiptonReduction]: Number of co-enabled transitions 1104 [2023-11-17 15:10:58,362 INFO L134 LiptonReduction]: Checked pairs total: 2278 [2023-11-17 15:10:58,362 INFO L136 LiptonReduction]: Total number of compositions: 40 [2023-11-17 15:10:58,364 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:10:58,364 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;@153fbfe1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:10:58,365 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-17 15:10:58,366 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:10:58,366 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2023-11-17 15:10:58,366 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:10:58,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:10:58,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 15:10:58,366 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 15:10:58,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:10:58,367 INFO L85 PathProgramCache]: Analyzing trace with hash 10703824, now seen corresponding path program 1 times [2023-11-17 15:10:58,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:10:58,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436738073] [2023-11-17 15:10:58,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:10:58,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:10:58,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:10:58,439 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 15:10:58,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:10:58,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436738073] [2023-11-17 15:10:58,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436738073] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:10:58,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:10:58,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 15:10:58,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791005328] [2023-11-17 15:10:58,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:10:58,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:10:58,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:10:58,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:10:58,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:10:58,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 92 [2023-11-17 15:10:58,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 22 transitions, 62 flow. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 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 15:10:58,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:10:58,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 92 [2023-11-17 15:10:58,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:10:58,498 INFO L124 PetriNetUnfolderBase]: 162/314 cut-off events. [2023-11-17 15:10:58,499 INFO L125 PetriNetUnfolderBase]: For 79/79 co-relation queries the response was YES. [2023-11-17 15:10:58,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 656 conditions, 314 events. 162/314 cut-off events. For 79/79 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1413 event pairs, 41 based on Foata normal form. 0/261 useless extension candidates. Maximal degree in co-relation 136. Up to 226 conditions per place. [2023-11-17 15:10:58,502 INFO L140 encePairwiseOnDemand]: 83/92 looper letters, 19 selfloop transitions, 4 changer transitions 0/29 dead transitions. [2023-11-17 15:10:58,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 29 transitions, 134 flow [2023-11-17 15:10:58,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:10:58,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:10:58,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 132 transitions. [2023-11-17 15:10:58,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4782608695652174 [2023-11-17 15:10:58,504 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 132 transitions. [2023-11-17 15:10:58,504 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 132 transitions. [2023-11-17 15:10:58,504 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:10:58,504 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 132 transitions. [2023-11-17 15:10:58,505 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:10:58,508 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 92.0) internal successors, (368), 4 states have internal predecessors, (368), 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 15:10:58,509 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 92.0) internal successors, (368), 4 states have internal predecessors, (368), 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 15:10:58,510 INFO L175 Difference]: Start difference. First operand has 28 places, 22 transitions, 62 flow. Second operand 3 states and 132 transitions. [2023-11-17 15:10:58,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 29 transitions, 134 flow [2023-11-17 15:10:58,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 29 transitions, 130 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-11-17 15:10:58,517 INFO L231 Difference]: Finished difference. Result has 30 places, 23 transitions, 86 flow [2023-11-17 15:10:58,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=30, PETRI_TRANSITIONS=23} [2023-11-17 15:10:58,517 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 2 predicate places. [2023-11-17 15:10:58,518 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 23 transitions, 86 flow [2023-11-17 15:10:58,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 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 15:10:58,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:10:58,518 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:10:58,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 15:10:58,518 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 15:10:58,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:10:58,519 INFO L85 PathProgramCache]: Analyzing trace with hash -845227351, now seen corresponding path program 1 times [2023-11-17 15:10:58,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:10:58,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817726090] [2023-11-17 15:10:58,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:10:58,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:10:58,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:10:58,597 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 15:10:58,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:10:58,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817726090] [2023-11-17 15:10:58,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817726090] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:10:58,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:10:58,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:10:58,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526393756] [2023-11-17 15:10:58,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:10:58,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:10:58,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:10:58,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:10:58,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:10:58,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 92 [2023-11-17 15:10:58,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 23 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 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 15:10:58,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:10:58,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 92 [2023-11-17 15:10:58,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:10:58,674 INFO L124 PetriNetUnfolderBase]: 279/467 cut-off events. [2023-11-17 15:10:58,674 INFO L125 PetriNetUnfolderBase]: For 94/94 co-relation queries the response was YES. [2023-11-17 15:10:58,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1168 conditions, 467 events. 279/467 cut-off events. For 94/94 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2065 event pairs, 57 based on Foata normal form. 46/505 useless extension candidates. Maximal degree in co-relation 816. Up to 392 conditions per place. [2023-11-17 15:10:58,678 INFO L140 encePairwiseOnDemand]: 86/92 looper letters, 23 selfloop transitions, 3 changer transitions 0/29 dead transitions. [2023-11-17 15:10:58,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 29 transitions, 154 flow [2023-11-17 15:10:58,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:10:58,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:10:58,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 128 transitions. [2023-11-17 15:10:58,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.463768115942029 [2023-11-17 15:10:58,683 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 128 transitions. [2023-11-17 15:10:58,683 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 128 transitions. [2023-11-17 15:10:58,683 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:10:58,683 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 128 transitions. [2023-11-17 15:10:58,685 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 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 15:10:58,687 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 92.0) internal successors, (368), 4 states have internal predecessors, (368), 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 15:10:58,687 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 92.0) internal successors, (368), 4 states have internal predecessors, (368), 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 15:10:58,687 INFO L175 Difference]: Start difference. First operand has 30 places, 23 transitions, 86 flow. Second operand 3 states and 128 transitions. [2023-11-17 15:10:58,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 29 transitions, 154 flow [2023-11-17 15:10:58,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 29 transitions, 150 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 15:10:58,691 INFO L231 Difference]: Finished difference. Result has 29 places, 23 transitions, 91 flow [2023-11-17 15:10:58,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=91, PETRI_PLACES=29, PETRI_TRANSITIONS=23} [2023-11-17 15:10:58,694 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 1 predicate places. [2023-11-17 15:10:58,694 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 23 transitions, 91 flow [2023-11-17 15:10:58,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 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 15:10:58,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:10:58,694 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-11-17 15:10:58,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-17 15:10:58,695 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 15:10:58,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:10:58,695 INFO L85 PathProgramCache]: Analyzing trace with hash 39859772, now seen corresponding path program 1 times [2023-11-17 15:10:58,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:10:58,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275456298] [2023-11-17 15:10:58,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:10:58,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:10:58,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:10:58,714 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:10:58,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:10:58,729 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:10:58,730 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:10:58,730 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-17 15:10:58,731 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-17 15:10:58,731 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-17 15:10:58,731 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-17 15:10:58,731 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-17 15:10:58,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-17 15:10:58,731 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-17 15:10:58,733 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:10:58,733 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-17 15:10:58,752 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:10:58,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 61 transitions, 150 flow [2023-11-17 15:10:58,765 INFO L124 PetriNetUnfolderBase]: 9/111 cut-off events. [2023-11-17 15:10:58,765 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-17 15:10:58,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130 conditions, 111 events. 9/111 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 164 event pairs, 0 based on Foata normal form. 0/93 useless extension candidates. Maximal degree in co-relation 97. Up to 10 conditions per place. [2023-11-17 15:10:58,766 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 61 transitions, 150 flow [2023-11-17 15:10:58,767 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 65 places, 61 transitions, 150 flow [2023-11-17 15:10:58,767 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:10:58,767 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 65 places, 61 transitions, 150 flow [2023-11-17 15:10:58,767 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 65 places, 61 transitions, 150 flow [2023-11-17 15:10:58,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 61 transitions, 150 flow [2023-11-17 15:10:58,777 INFO L124 PetriNetUnfolderBase]: 9/111 cut-off events. [2023-11-17 15:10:58,777 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-17 15:10:58,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130 conditions, 111 events. 9/111 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 164 event pairs, 0 based on Foata normal form. 0/93 useless extension candidates. Maximal degree in co-relation 97. Up to 10 conditions per place. [2023-11-17 15:10:58,779 INFO L119 LiptonReduction]: Number of co-enabled transitions 1760 [2023-11-17 15:10:59,703 INFO L134 LiptonReduction]: Checked pairs total: 3769 [2023-11-17 15:10:59,704 INFO L136 LiptonReduction]: Total number of compositions: 48 [2023-11-17 15:10:59,705 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:10:59,706 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;@153fbfe1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:10:59,706 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-17 15:10:59,707 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:10:59,707 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2023-11-17 15:10:59,708 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:10:59,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:10:59,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 15:10:59,708 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 15:10:59,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:10:59,708 INFO L85 PathProgramCache]: Analyzing trace with hash 14333169, now seen corresponding path program 1 times [2023-11-17 15:10:59,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:10:59,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492304153] [2023-11-17 15:10:59,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:10:59,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:10:59,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:10:59,758 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 15:10:59,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:10:59,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492304153] [2023-11-17 15:10:59,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492304153] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:10:59,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:10:59,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 15:10:59,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401538205] [2023-11-17 15:10:59,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:10:59,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:10:59,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:10:59,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:10:59,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:10:59,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 109 [2023-11-17 15:10:59,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 28 transitions, 84 flow. Second operand has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 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 15:10:59,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:10:59,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 109 [2023-11-17 15:10:59,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:10:59,912 INFO L124 PetriNetUnfolderBase]: 1032/1602 cut-off events. [2023-11-17 15:10:59,913 INFO L125 PetriNetUnfolderBase]: For 549/549 co-relation queries the response was YES. [2023-11-17 15:10:59,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3422 conditions, 1602 events. 1032/1602 cut-off events. For 549/549 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 8244 event pairs, 269 based on Foata normal form. 0/1245 useless extension candidates. Maximal degree in co-relation 666. Up to 1390 conditions per place. [2023-11-17 15:10:59,926 INFO L140 encePairwiseOnDemand]: 97/109 looper letters, 25 selfloop transitions, 5 changer transitions 0/37 dead transitions. [2023-11-17 15:10:59,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 37 transitions, 183 flow [2023-11-17 15:10:59,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:10:59,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:10:59,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 154 transitions. [2023-11-17 15:10:59,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4709480122324159 [2023-11-17 15:10:59,928 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 154 transitions. [2023-11-17 15:10:59,928 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 154 transitions. [2023-11-17 15:10:59,928 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:10:59,928 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 154 transitions. [2023-11-17 15:10:59,929 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:10:59,930 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 109.0) internal successors, (436), 4 states have internal predecessors, (436), 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 15:10:59,930 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 109.0) internal successors, (436), 4 states have internal predecessors, (436), 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 15:10:59,930 INFO L175 Difference]: Start difference. First operand has 35 places, 28 transitions, 84 flow. Second operand 3 states and 154 transitions. [2023-11-17 15:10:59,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 37 transitions, 183 flow [2023-11-17 15:10:59,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 37 transitions, 171 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-11-17 15:10:59,932 INFO L231 Difference]: Finished difference. Result has 37 places, 29 transitions, 111 flow [2023-11-17 15:10:59,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=111, PETRI_PLACES=37, PETRI_TRANSITIONS=29} [2023-11-17 15:10:59,933 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 2 predicate places. [2023-11-17 15:10:59,933 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 29 transitions, 111 flow [2023-11-17 15:10:59,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 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 15:10:59,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:10:59,933 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:10:59,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-17 15:10:59,934 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 15:10:59,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:10:59,934 INFO L85 PathProgramCache]: Analyzing trace with hash -228905250, now seen corresponding path program 1 times [2023-11-17 15:10:59,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:10:59,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46074714] [2023-11-17 15:10:59,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:10:59,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:10:59,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:10:59,963 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 15:10:59,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:10:59,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46074714] [2023-11-17 15:10:59,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46074714] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:10:59,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:10:59,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:10:59,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123533461] [2023-11-17 15:10:59,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:10:59,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:10:59,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:10:59,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:10:59,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:10:59,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 109 [2023-11-17 15:10:59,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 29 transitions, 111 flow. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 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 15:10:59,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:10:59,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 109 [2023-11-17 15:10:59,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:11:00,211 INFO L124 PetriNetUnfolderBase]: 1623/2343 cut-off events. [2023-11-17 15:11:00,211 INFO L125 PetriNetUnfolderBase]: For 522/522 co-relation queries the response was YES. [2023-11-17 15:11:00,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5821 conditions, 2343 events. 1623/2343 cut-off events. For 522/522 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 11351 event pairs, 347 based on Foata normal form. 342/2664 useless extension candidates. Maximal degree in co-relation 4266. Up to 2160 conditions per place. [2023-11-17 15:11:00,230 INFO L140 encePairwiseOnDemand]: 101/109 looper letters, 30 selfloop transitions, 4 changer transitions 0/37 dead transitions. [2023-11-17 15:11:00,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 37 transitions, 202 flow [2023-11-17 15:11:00,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:11:00,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:11:00,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 148 transitions. [2023-11-17 15:11:00,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4525993883792049 [2023-11-17 15:11:00,232 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 148 transitions. [2023-11-17 15:11:00,232 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 148 transitions. [2023-11-17 15:11:00,232 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:11:00,232 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 148 transitions. [2023-11-17 15:11:00,233 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 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 15:11:00,234 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 109.0) internal successors, (436), 4 states have internal predecessors, (436), 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 15:11:00,234 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 109.0) internal successors, (436), 4 states have internal predecessors, (436), 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 15:11:00,234 INFO L175 Difference]: Start difference. First operand has 37 places, 29 transitions, 111 flow. Second operand 3 states and 148 transitions. [2023-11-17 15:11:00,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 37 transitions, 202 flow [2023-11-17 15:11:00,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 37 transitions, 197 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 15:11:00,238 INFO L231 Difference]: Finished difference. Result has 35 places, 29 transitions, 118 flow [2023-11-17 15:11:00,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=35, PETRI_TRANSITIONS=29} [2023-11-17 15:11:00,239 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 0 predicate places. [2023-11-17 15:11:00,239 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 29 transitions, 118 flow [2023-11-17 15:11:00,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 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 15:11:00,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:11:00,240 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-11-17 15:11:00,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-17 15:11:00,240 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 15:11:00,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:11:00,240 INFO L85 PathProgramCache]: Analyzing trace with hash 46670156, now seen corresponding path program 1 times [2023-11-17 15:11:00,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:11:00,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671142359] [2023-11-17 15:11:00,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:11:00,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:11:00,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:11:00,259 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:11:00,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:11:00,274 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:11:00,274 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:11:00,274 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-11-17 15:11:00,274 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-11-17 15:11:00,274 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-11-17 15:11:00,274 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-11-17 15:11:00,276 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-11-17 15:11:00,276 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-11-17 15:11:00,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-17 15:11:00,276 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-17 15:11:00,277 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:11:00,277 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-11-17 15:11:00,295 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:11:00,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 75 places, 70 transitions, 180 flow [2023-11-17 15:11:00,308 INFO L124 PetriNetUnfolderBase]: 11/133 cut-off events. [2023-11-17 15:11:00,308 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-17 15:11:00,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159 conditions, 133 events. 11/133 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 201 event pairs, 0 based on Foata normal form. 0/111 useless extension candidates. Maximal degree in co-relation 124. Up to 12 conditions per place. [2023-11-17 15:11:00,309 INFO L82 GeneralOperation]: Start removeDead. Operand has 75 places, 70 transitions, 180 flow [2023-11-17 15:11:00,310 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 75 places, 70 transitions, 180 flow [2023-11-17 15:11:00,310 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:11:00,310 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 75 places, 70 transitions, 180 flow [2023-11-17 15:11:00,311 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 75 places, 70 transitions, 180 flow [2023-11-17 15:11:00,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 75 places, 70 transitions, 180 flow [2023-11-17 15:11:00,323 INFO L124 PetriNetUnfolderBase]: 11/133 cut-off events. [2023-11-17 15:11:00,324 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-17 15:11:00,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159 conditions, 133 events. 11/133 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 201 event pairs, 0 based on Foata normal form. 0/111 useless extension candidates. Maximal degree in co-relation 124. Up to 12 conditions per place. [2023-11-17 15:11:00,326 INFO L119 LiptonReduction]: Number of co-enabled transitions 2560 [2023-11-17 15:11:01,273 INFO L134 LiptonReduction]: Checked pairs total: 5019 [2023-11-17 15:11:01,274 INFO L136 LiptonReduction]: Total number of compositions: 52 [2023-11-17 15:11:01,275 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:11:01,275 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;@153fbfe1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:11:01,275 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-17 15:11:01,276 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:11:01,276 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2023-11-17 15:11:01,276 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:11:01,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:11:01,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 15:11:01,277 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-17 15:11:01,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:11:01,277 INFO L85 PathProgramCache]: Analyzing trace with hash 18369551, now seen corresponding path program 1 times [2023-11-17 15:11:01,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:11:01,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527064852] [2023-11-17 15:11:01,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:11:01,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:11:01,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:11:01,324 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 15:11:01,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:11:01,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527064852] [2023-11-17 15:11:01,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527064852] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:11:01,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:11:01,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 15:11:01,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579384436] [2023-11-17 15:11:01,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:11:01,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:11:01,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:11:01,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:11:01,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:11:01,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 122 [2023-11-17 15:11:01,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 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 15:11:01,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:11:01,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 122 [2023-11-17 15:11:01,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:11:02,097 INFO L124 PetriNetUnfolderBase]: 5980/8248 cut-off events. [2023-11-17 15:11:02,098 INFO L125 PetriNetUnfolderBase]: For 3486/3486 co-relation queries the response was YES. [2023-11-17 15:11:02,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17789 conditions, 8248 events. 5980/8248 cut-off events. For 3486/3486 co-relation queries the response was YES. Maximal size of possible extension queue 659. Compared 45322 event pairs, 1759 based on Foata normal form. 0/6125 useless extension candidates. Maximal degree in co-relation 3476. Up to 7756 conditions per place. [2023-11-17 15:11:02,172 INFO L140 encePairwiseOnDemand]: 109/122 looper letters, 31 selfloop transitions, 6 changer transitions 0/45 dead transitions. [2023-11-17 15:11:02,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 45 transitions, 236 flow [2023-11-17 15:11:02,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:11:02,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:11:02,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 172 transitions. [2023-11-17 15:11:02,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46994535519125685 [2023-11-17 15:11:02,174 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 172 transitions. [2023-11-17 15:11:02,174 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 172 transitions. [2023-11-17 15:11:02,174 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:11:02,174 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 172 transitions. [2023-11-17 15:11:02,174 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 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 15:11:02,175 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 122.0) internal successors, (488), 4 states have internal predecessors, (488), 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 15:11:02,176 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 122.0) internal successors, (488), 4 states have internal predecessors, (488), 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 15:11:02,176 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 104 flow. Second operand 3 states and 172 transitions. [2023-11-17 15:11:02,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 45 transitions, 236 flow [2023-11-17 15:11:02,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 45 transitions, 212 flow, removed 12 selfloop flow, removed 0 redundant places. [2023-11-17 15:11:02,180 INFO L231 Difference]: Finished difference. Result has 44 places, 35 transitions, 136 flow [2023-11-17 15:11:02,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=122, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=44, PETRI_TRANSITIONS=35} [2023-11-17 15:11:02,181 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 2 predicate places. [2023-11-17 15:11:02,181 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 35 transitions, 136 flow [2023-11-17 15:11:02,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 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 15:11:02,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:11:02,182 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:11:02,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-17 15:11:02,182 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-17 15:11:02,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:11:02,182 INFO L85 PathProgramCache]: Analyzing trace with hash 551350903, now seen corresponding path program 1 times [2023-11-17 15:11:02,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:11:02,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462784720] [2023-11-17 15:11:02,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:11:02,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:11:02,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:11:02,225 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 15:11:02,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:11:02,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462784720] [2023-11-17 15:11:02,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462784720] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:11:02,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:11:02,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:11:02,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049143162] [2023-11-17 15:11:02,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:11:02,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:11:02,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:11:02,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:11:02,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:11:02,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 122 [2023-11-17 15:11:02,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 35 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 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 15:11:02,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:11:02,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 122 [2023-11-17 15:11:02,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:11:03,200 INFO L124 PetriNetUnfolderBase]: 8535/11343 cut-off events. [2023-11-17 15:11:03,200 INFO L125 PetriNetUnfolderBase]: For 2720/2720 co-relation queries the response was YES. [2023-11-17 15:11:03,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27920 conditions, 11343 events. 8535/11343 cut-off events. For 2720/2720 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 58086 event pairs, 2043 based on Foata normal form. 2092/13381 useless extension candidates. Maximal degree in co-relation 20684. Up to 10912 conditions per place. [2023-11-17 15:11:03,287 INFO L140 encePairwiseOnDemand]: 112/122 looper letters, 37 selfloop transitions, 5 changer transitions 0/45 dead transitions. [2023-11-17 15:11:03,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 45 transitions, 250 flow [2023-11-17 15:11:03,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:11:03,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:11:03,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 168 transitions. [2023-11-17 15:11:03,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45901639344262296 [2023-11-17 15:11:03,288 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 168 transitions. [2023-11-17 15:11:03,288 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 168 transitions. [2023-11-17 15:11:03,288 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:11:03,289 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 168 transitions. [2023-11-17 15:11:03,289 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 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 15:11:03,290 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 122.0) internal successors, (488), 4 states have internal predecessors, (488), 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 15:11:03,290 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 122.0) internal successors, (488), 4 states have internal predecessors, (488), 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 15:11:03,290 INFO L175 Difference]: Start difference. First operand has 44 places, 35 transitions, 136 flow. Second operand 3 states and 168 transitions. [2023-11-17 15:11:03,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 45 transitions, 250 flow [2023-11-17 15:11:03,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 45 transitions, 244 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 15:11:03,294 INFO L231 Difference]: Finished difference. Result has 41 places, 35 transitions, 145 flow [2023-11-17 15:11:03,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=122, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=145, PETRI_PLACES=41, PETRI_TRANSITIONS=35} [2023-11-17 15:11:03,295 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -1 predicate places. [2023-11-17 15:11:03,295 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 35 transitions, 145 flow [2023-11-17 15:11:03,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 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 15:11:03,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:11:03,295 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:11:03,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-17 15:11:03,296 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-17 15:11:03,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:11:03,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1304092204, now seen corresponding path program 1 times [2023-11-17 15:11:03,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:11:03,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247605403] [2023-11-17 15:11:03,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:11:03,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:11:03,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:11:03,309 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:11:03,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:11:03,319 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:11:03,319 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:11:03,319 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-11-17 15:11:03,319 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2023-11-17 15:11:03,319 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2023-11-17 15:11:03,320 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2023-11-17 15:11:03,320 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2023-11-17 15:11:03,320 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2023-11-17 15:11:03,320 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2023-11-17 15:11:03,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-17 15:11:03,320 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-17 15:11:03,321 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:11:03,321 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-11-17 15:11:03,335 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:11:03,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 85 places, 79 transitions, 212 flow [2023-11-17 15:11:03,347 INFO L124 PetriNetUnfolderBase]: 13/155 cut-off events. [2023-11-17 15:11:03,347 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2023-11-17 15:11:03,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 189 conditions, 155 events. 13/155 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 242 event pairs, 0 based on Foata normal form. 0/129 useless extension candidates. Maximal degree in co-relation 152. Up to 14 conditions per place. [2023-11-17 15:11:03,348 INFO L82 GeneralOperation]: Start removeDead. Operand has 85 places, 79 transitions, 212 flow [2023-11-17 15:11:03,349 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 85 places, 79 transitions, 212 flow [2023-11-17 15:11:03,349 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:11:03,349 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 85 places, 79 transitions, 212 flow [2023-11-17 15:11:03,350 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 85 places, 79 transitions, 212 flow [2023-11-17 15:11:03,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 85 places, 79 transitions, 212 flow [2023-11-17 15:11:03,359 INFO L124 PetriNetUnfolderBase]: 13/155 cut-off events. [2023-11-17 15:11:03,360 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2023-11-17 15:11:03,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 189 conditions, 155 events. 13/155 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 242 event pairs, 0 based on Foata normal form. 0/129 useless extension candidates. Maximal degree in co-relation 152. Up to 14 conditions per place. [2023-11-17 15:11:03,363 INFO L119 LiptonReduction]: Number of co-enabled transitions 3504 [2023-11-17 15:11:04,554 INFO L134 LiptonReduction]: Checked pairs total: 8056 [2023-11-17 15:11:04,554 INFO L136 LiptonReduction]: Total number of compositions: 64 [2023-11-17 15:11:04,556 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:11:04,556 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;@153fbfe1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:11:04,557 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-11-17 15:11:04,558 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:11:04,558 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2023-11-17 15:11:04,558 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:11:04,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:11:04,558 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 15:11:04,558 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2023-11-17 15:11:04,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:11:04,559 INFO L85 PathProgramCache]: Analyzing trace with hash 23006015, now seen corresponding path program 1 times [2023-11-17 15:11:04,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:11:04,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18340027] [2023-11-17 15:11:04,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:11:04,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:11:04,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:11:04,597 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 15:11:04,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:11:04,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18340027] [2023-11-17 15:11:04,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18340027] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:11:04,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:11:04,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 15:11:04,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667746688] [2023-11-17 15:11:04,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:11:04,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:11:04,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:11:04,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:11:04,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:11:04,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 143 [2023-11-17 15:11:04,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 40 transitions, 134 flow. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 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 15:11:04,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:11:04,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 143 [2023-11-17 15:11:04,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:11:08,012 INFO L124 PetriNetUnfolderBase]: 32246/41520 cut-off events. [2023-11-17 15:11:08,012 INFO L125 PetriNetUnfolderBase]: For 20783/20783 co-relation queries the response was YES. [2023-11-17 15:11:08,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89881 conditions, 41520 events. 32246/41520 cut-off events. For 20783/20783 co-relation queries the response was YES. Maximal size of possible extension queue 2609. Compared 232449 event pairs, 10687 based on Foata normal form. 0/29993 useless extension candidates. Maximal degree in co-relation 18033. Up to 40404 conditions per place. [2023-11-17 15:11:08,584 INFO L140 encePairwiseOnDemand]: 125/143 looper letters, 37 selfloop transitions, 7 changer transitions 0/53 dead transitions. [2023-11-17 15:11:08,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 53 transitions, 293 flow [2023-11-17 15:11:08,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:11:08,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:11:08,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 198 transitions. [2023-11-17 15:11:08,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2023-11-17 15:11:08,585 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 198 transitions. [2023-11-17 15:11:08,585 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 198 transitions. [2023-11-17 15:11:08,586 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:11:08,586 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 198 transitions. [2023-11-17 15:11:08,586 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 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 15:11:08,587 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 143.0) internal successors, (572), 4 states have internal predecessors, (572), 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 15:11:08,587 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 143.0) internal successors, (572), 4 states have internal predecessors, (572), 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 15:11:08,587 INFO L175 Difference]: Start difference. First operand has 49 places, 40 transitions, 134 flow. Second operand 3 states and 198 transitions. [2023-11-17 15:11:08,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 53 transitions, 293 flow [2023-11-17 15:11:08,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 53 transitions, 253 flow, removed 20 selfloop flow, removed 0 redundant places. [2023-11-17 15:11:08,609 INFO L231 Difference]: Finished difference. Result has 51 places, 41 transitions, 161 flow [2023-11-17 15:11:08,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=143, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=161, PETRI_PLACES=51, PETRI_TRANSITIONS=41} [2023-11-17 15:11:08,610 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 2 predicate places. [2023-11-17 15:11:08,611 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 41 transitions, 161 flow [2023-11-17 15:11:08,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 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 15:11:08,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:11:08,611 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:11:08,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-17 15:11:08,611 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2023-11-17 15:11:08,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:11:08,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1204010839, now seen corresponding path program 1 times [2023-11-17 15:11:08,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:11:08,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110351076] [2023-11-17 15:11:08,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:11:08,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:11:08,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:11:08,643 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 15:11:08,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:11:08,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110351076] [2023-11-17 15:11:08,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110351076] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:11:08,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:11:08,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:11:08,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556421551] [2023-11-17 15:11:08,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:11:08,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:11:08,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:11:08,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:11:08,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:11:08,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 143 [2023-11-17 15:11:08,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 41 transitions, 161 flow. Second operand has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 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 15:11:08,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:11:08,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 143 [2023-11-17 15:11:08,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:11:12,092 INFO L124 PetriNetUnfolderBase]: 42327/53407 cut-off events. [2023-11-17 15:11:12,093 INFO L125 PetriNetUnfolderBase]: For 13628/13628 co-relation queries the response was YES. [2023-11-17 15:11:12,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130245 conditions, 53407 events. 42327/53407 cut-off events. For 13628/13628 co-relation queries the response was YES. Maximal size of possible extension queue 2248. Compared 280282 event pairs, 11441 based on Foata normal form. 11464/64736 useless extension candidates. Maximal degree in co-relation 96806. Up to 52416 conditions per place. [2023-11-17 15:11:12,490 INFO L140 encePairwiseOnDemand]: 131/143 looper letters, 44 selfloop transitions, 6 changer transitions 0/53 dead transitions. [2023-11-17 15:11:12,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 53 transitions, 298 flow [2023-11-17 15:11:12,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:11:12,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:11:12,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 188 transitions. [2023-11-17 15:11:12,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4382284382284382 [2023-11-17 15:11:12,491 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 188 transitions. [2023-11-17 15:11:12,492 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 188 transitions. [2023-11-17 15:11:12,492 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:11:12,492 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 188 transitions. [2023-11-17 15:11:12,493 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 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 15:11:12,493 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 143.0) internal successors, (572), 4 states have internal predecessors, (572), 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 15:11:12,493 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 143.0) internal successors, (572), 4 states have internal predecessors, (572), 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 15:11:12,494 INFO L175 Difference]: Start difference. First operand has 51 places, 41 transitions, 161 flow. Second operand 3 states and 188 transitions. [2023-11-17 15:11:12,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 53 transitions, 298 flow [2023-11-17 15:11:12,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 53 transitions, 291 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 15:11:12,509 INFO L231 Difference]: Finished difference. Result has 47 places, 41 transitions, 172 flow [2023-11-17 15:11:12,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=143, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=172, PETRI_PLACES=47, PETRI_TRANSITIONS=41} [2023-11-17 15:11:12,510 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -2 predicate places. [2023-11-17 15:11:12,510 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 41 transitions, 172 flow [2023-11-17 15:11:12,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 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 15:11:12,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:11:12,510 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:11:12,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-17 15:11:12,510 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2023-11-17 15:11:12,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:11:12,511 INFO L85 PathProgramCache]: Analyzing trace with hash -794777266, now seen corresponding path program 1 times [2023-11-17 15:11:12,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:11:12,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111394288] [2023-11-17 15:11:12,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:11:12,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:11:12,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:11:12,524 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:11:12,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:11:12,548 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:11:12,550 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:11:12,550 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 8 remaining) [2023-11-17 15:11:12,550 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 8 remaining) [2023-11-17 15:11:12,551 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 8 remaining) [2023-11-17 15:11:12,551 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 8 remaining) [2023-11-17 15:11:12,551 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 8 remaining) [2023-11-17 15:11:12,551 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 8 remaining) [2023-11-17 15:11:12,551 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 8 remaining) [2023-11-17 15:11:12,551 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 8 remaining) [2023-11-17 15:11:12,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-17 15:11:12,552 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-17 15:11:12,553 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:11:12,554 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2023-11-17 15:11:12,571 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:11:12,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 95 places, 88 transitions, 246 flow [2023-11-17 15:11:12,587 INFO L124 PetriNetUnfolderBase]: 15/177 cut-off events. [2023-11-17 15:11:12,587 INFO L125 PetriNetUnfolderBase]: For 77/77 co-relation queries the response was YES. [2023-11-17 15:11:12,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 220 conditions, 177 events. 15/177 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 287 event pairs, 0 based on Foata normal form. 0/147 useless extension candidates. Maximal degree in co-relation 181. Up to 16 conditions per place. [2023-11-17 15:11:12,588 INFO L82 GeneralOperation]: Start removeDead. Operand has 95 places, 88 transitions, 246 flow [2023-11-17 15:11:12,590 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 95 places, 88 transitions, 246 flow [2023-11-17 15:11:12,590 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:11:12,590 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 95 places, 88 transitions, 246 flow [2023-11-17 15:11:12,590 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 95 places, 88 transitions, 246 flow [2023-11-17 15:11:12,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 95 places, 88 transitions, 246 flow [2023-11-17 15:11:12,603 INFO L124 PetriNetUnfolderBase]: 15/177 cut-off events. [2023-11-17 15:11:12,603 INFO L125 PetriNetUnfolderBase]: For 77/77 co-relation queries the response was YES. [2023-11-17 15:11:12,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 220 conditions, 177 events. 15/177 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 287 event pairs, 0 based on Foata normal form. 0/147 useless extension candidates. Maximal degree in co-relation 181. Up to 16 conditions per place. [2023-11-17 15:11:12,608 INFO L119 LiptonReduction]: Number of co-enabled transitions 4592 [2023-11-17 15:11:13,954 INFO L134 LiptonReduction]: Checked pairs total: 11654 [2023-11-17 15:11:13,954 INFO L136 LiptonReduction]: Total number of compositions: 72 [2023-11-17 15:11:13,956 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:11:13,956 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;@153fbfe1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:11:13,956 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2023-11-17 15:11:13,957 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:11:13,957 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2023-11-17 15:11:13,957 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:11:13,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:11:13,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 15:11:13,958 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2023-11-17 15:11:13,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:11:13,958 INFO L85 PathProgramCache]: Analyzing trace with hash 28149609, now seen corresponding path program 1 times [2023-11-17 15:11:13,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:11:13,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519863120] [2023-11-17 15:11:13,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:11:13,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:11:13,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:11:13,984 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 15:11:13,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:11:13,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519863120] [2023-11-17 15:11:13,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519863120] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:11:13,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:11:13,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 15:11:13,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301884084] [2023-11-17 15:11:13,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:11:13,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:11:13,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:11:13,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:11:13,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:11:13,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 160 [2023-11-17 15:11:13,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 46 transitions, 162 flow. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:11:13,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:11:13,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 160 [2023-11-17 15:11:13,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:11:28,344 INFO L124 PetriNetUnfolderBase]: 164558/202770 cut-off events. [2023-11-17 15:11:28,344 INFO L125 PetriNetUnfolderBase]: For 117491/117491 co-relation queries the response was YES. [2023-11-17 15:11:28,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 439542 conditions, 202770 events. 164558/202770 cut-off events. For 117491/117491 co-relation queries the response was YES. Maximal size of possible extension queue 10263. Compared 1153402 event pairs, 60109 based on Foata normal form. 0/144041 useless extension candidates. Maximal degree in co-relation 90937. Up to 200278 conditions per place. [2023-11-17 15:11:30,133 INFO L140 encePairwiseOnDemand]: 139/160 looper letters, 43 selfloop transitions, 8 changer transitions 0/61 dead transitions. [2023-11-17 15:11:30,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 61 transitions, 354 flow [2023-11-17 15:11:30,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:11:30,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:11:30,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 220 transitions. [2023-11-17 15:11:30,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2023-11-17 15:11:30,135 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 220 transitions. [2023-11-17 15:11:30,135 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 220 transitions. [2023-11-17 15:11:30,135 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:11:30,135 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 220 transitions. [2023-11-17 15:11:30,135 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 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 15:11:30,136 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 160.0) internal successors, (640), 4 states have internal predecessors, (640), 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 15:11:30,136 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 160.0) internal successors, (640), 4 states have internal predecessors, (640), 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 15:11:30,136 INFO L175 Difference]: Start difference. First operand has 56 places, 46 transitions, 162 flow. Second operand 3 states and 220 transitions. [2023-11-17 15:11:30,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 61 transitions, 354 flow [2023-11-17 15:11:30,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 61 transitions, 294 flow, removed 30 selfloop flow, removed 0 redundant places. [2023-11-17 15:11:30,183 INFO L231 Difference]: Finished difference. Result has 58 places, 47 transitions, 186 flow [2023-11-17 15:11:30,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=186, PETRI_PLACES=58, PETRI_TRANSITIONS=47} [2023-11-17 15:11:30,183 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 2 predicate places. [2023-11-17 15:11:30,183 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 47 transitions, 186 flow [2023-11-17 15:11:30,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:11:30,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:11:30,184 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:11:30,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-17 15:11:30,184 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2023-11-17 15:11:30,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:11:30,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1905290139, now seen corresponding path program 1 times [2023-11-17 15:11:30,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:11:30,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545971427] [2023-11-17 15:11:30,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:11:30,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:11:30,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:11:30,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 15:11:30,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:11:30,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545971427] [2023-11-17 15:11:30,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545971427] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:11:30,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:11:30,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:11:30,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811529716] [2023-11-17 15:11:30,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:11:30,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:11:30,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:11:30,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:11:30,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:11:30,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 160 [2023-11-17 15:11:30,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 47 transitions, 186 flow. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 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 15:11:30,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:11:30,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 160 [2023-11-17 15:11:30,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:11:45,454 INFO L124 PetriNetUnfolderBase]: 202071/246079 cut-off events. [2023-11-17 15:11:45,454 INFO L125 PetriNetUnfolderBase]: For 66174/66174 co-relation queries the response was YES. [2023-11-17 15:11:46,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 595268 conditions, 246079 events. 202071/246079 cut-off events. For 66174/66174 co-relation queries the response was YES. Maximal size of possible extension queue 8505. Compared 1323264 event pairs, 60901 based on Foata normal form. 58602/304353 useless extension candidates. Maximal degree in co-relation 443104. Up to 243840 conditions per place. [2023-11-17 15:11:47,313 INFO L140 encePairwiseOnDemand]: 146/160 looper letters, 51 selfloop transitions, 7 changer transitions 0/61 dead transitions. [2023-11-17 15:11:47,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 61 transitions, 346 flow [2023-11-17 15:11:47,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:11:47,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:11:47,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 208 transitions. [2023-11-17 15:11:47,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2023-11-17 15:11:47,314 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 208 transitions. [2023-11-17 15:11:47,315 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 208 transitions. [2023-11-17 15:11:47,315 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:11:47,315 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 208 transitions. [2023-11-17 15:11:47,315 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 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 15:11:47,316 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 160.0) internal successors, (640), 4 states have internal predecessors, (640), 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 15:11:47,316 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 160.0) internal successors, (640), 4 states have internal predecessors, (640), 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 15:11:47,316 INFO L175 Difference]: Start difference. First operand has 58 places, 47 transitions, 186 flow. Second operand 3 states and 208 transitions. [2023-11-17 15:11:47,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 61 transitions, 346 flow [2023-11-17 15:11:47,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 61 transitions, 338 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 15:11:47,385 INFO L231 Difference]: Finished difference. Result has 53 places, 47 transitions, 199 flow [2023-11-17 15:11:47,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=199, PETRI_PLACES=53, PETRI_TRANSITIONS=47} [2023-11-17 15:11:47,386 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -3 predicate places. [2023-11-17 15:11:47,386 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 47 transitions, 199 flow [2023-11-17 15:11:47,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 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 15:11:47,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:11:47,386 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:11:47,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-17 15:11:47,386 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2023-11-17 15:11:47,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:11:47,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1969052655, now seen corresponding path program 1 times [2023-11-17 15:11:47,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:11:47,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372136363] [2023-11-17 15:11:47,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:11:47,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:11:47,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:11:47,404 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:11:47,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:11:47,428 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:11:47,429 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:11:47,429 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 9 remaining) [2023-11-17 15:11:47,429 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (7 of 9 remaining) [2023-11-17 15:11:47,429 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 9 remaining) [2023-11-17 15:11:47,429 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 9 remaining) [2023-11-17 15:11:47,429 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 9 remaining) [2023-11-17 15:11:47,429 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 9 remaining) [2023-11-17 15:11:47,430 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 9 remaining) [2023-11-17 15:11:47,430 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 9 remaining) [2023-11-17 15:11:47,430 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 9 remaining) [2023-11-17 15:11:47,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-17 15:11:47,430 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-17 15:11:47,432 WARN L233 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:11:47,432 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2023-11-17 15:11:47,456 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:11:47,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 97 transitions, 282 flow [2023-11-17 15:11:47,472 INFO L124 PetriNetUnfolderBase]: 17/199 cut-off events. [2023-11-17 15:11:47,472 INFO L125 PetriNetUnfolderBase]: For 112/112 co-relation queries the response was YES. [2023-11-17 15:11:47,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 252 conditions, 199 events. 17/199 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 314 event pairs, 0 based on Foata normal form. 0/165 useless extension candidates. Maximal degree in co-relation 211. Up to 18 conditions per place. [2023-11-17 15:11:47,474 INFO L82 GeneralOperation]: Start removeDead. Operand has 105 places, 97 transitions, 282 flow [2023-11-17 15:11:47,475 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 105 places, 97 transitions, 282 flow [2023-11-17 15:11:47,475 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:11:47,475 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 105 places, 97 transitions, 282 flow [2023-11-17 15:11:47,477 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 105 places, 97 transitions, 282 flow [2023-11-17 15:11:47,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 97 transitions, 282 flow [2023-11-17 15:11:47,490 INFO L124 PetriNetUnfolderBase]: 17/199 cut-off events. [2023-11-17 15:11:47,490 INFO L125 PetriNetUnfolderBase]: For 112/112 co-relation queries the response was YES. [2023-11-17 15:11:47,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 252 conditions, 199 events. 17/199 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 314 event pairs, 0 based on Foata normal form. 0/165 useless extension candidates. Maximal degree in co-relation 211. Up to 18 conditions per place. [2023-11-17 15:11:47,495 INFO L119 LiptonReduction]: Number of co-enabled transitions 5824 [2023-11-17 15:11:48,719 INFO L134 LiptonReduction]: Checked pairs total: 12790 [2023-11-17 15:11:48,719 INFO L136 LiptonReduction]: Total number of compositions: 74 [2023-11-17 15:11:48,721 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:11:48,721 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;@153fbfe1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:11:48,721 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2023-11-17 15:11:48,722 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:11:48,722 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2023-11-17 15:11:48,722 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:11:48,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:11:48,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 15:11:48,722 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-11-17 15:11:48,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:11:48,723 INFO L85 PathProgramCache]: Analyzing trace with hash 33724289, now seen corresponding path program 1 times [2023-11-17 15:11:48,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:11:48,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853372220] [2023-11-17 15:11:48,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:11:48,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:11:48,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:11:48,881 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 15:11:48,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:11:48,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853372220] [2023-11-17 15:11:48,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853372220] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:11:48,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:11:48,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 15:11:48,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872879037] [2023-11-17 15:11:48,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:11:48,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:11:48,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:11:48,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:11:48,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:11:48,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 171 [2023-11-17 15:11:48,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 49 transitions, 186 flow. Second operand has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 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 15:11:48,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:11:48,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 171 [2023-11-17 15:11:48,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand