/usr/bin/java -Xmx16000000000 -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-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-ext/09_fmaxsym.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 11:15:55,436 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 11:15:55,509 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-VariableLbe.epf [2023-08-24 11:15:55,516 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 11:15:55,517 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 11:15:55,551 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 11:15:55,552 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 11:15:55,552 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 11:15:55,553 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 11:15:55,557 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 11:15:55,557 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 11:15:55,557 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 11:15:55,557 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 11:15:55,559 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 11:15:55,559 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 11:15:55,559 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 11:15:55,559 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 11:15:55,559 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 11:15:55,560 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 11:15:55,560 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 11:15:55,560 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 11:15:55,561 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 11:15:55,561 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 11:15:55,562 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 11:15:55,562 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 11:15:55,562 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 11:15:55,562 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 11:15:55,562 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 11:15:55,563 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 11:15:55,563 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 11:15:55,564 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 11:15:55,564 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 11:15:55,564 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 11:15:55,564 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 11:15:55,564 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 11:15:55,565 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-24 11:15:55,897 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 11:15:55,923 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 11:15:55,926 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 11:15:55,927 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 11:15:55,927 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 11:15:55,929 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/09_fmaxsym.i [2023-08-24 11:15:57,126 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 11:15:57,379 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 11:15:57,380 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/09_fmaxsym.i [2023-08-24 11:15:57,398 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33679fcda/db308c9f74af483f9416ab704481020c/FLAG19fa6fa46 [2023-08-24 11:15:57,415 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33679fcda/db308c9f74af483f9416ab704481020c [2023-08-24 11:15:57,420 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 11:15:57,421 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 11:15:57,424 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 11:15:57,424 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 11:15:57,427 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 11:15:57,428 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 11:15:57" (1/1) ... [2023-08-24 11:15:57,429 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@151b0318 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:15:57, skipping insertion in model container [2023-08-24 11:15:57,430 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 11:15:57" (1/1) ... [2023-08-24 11:15:57,479 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 11:15:57,803 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/09_fmaxsym.i[30422,30435] [2023-08-24 11:15:57,812 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 11:15:57,824 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 11:15:57,851 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [254] [2023-08-24 11:15:57,852 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [254] [2023-08-24 11:15:57,863 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/09_fmaxsym.i[30422,30435] [2023-08-24 11:15:57,875 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 11:15:57,917 INFO L206 MainTranslator]: Completed translation [2023-08-24 11:15:57,917 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:15:57 WrapperNode [2023-08-24 11:15:57,918 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 11:15:57,919 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 11:15:57,919 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 11:15:57,919 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 11:15:57,926 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:15:57" (1/1) ... [2023-08-24 11:15:57,942 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:15:57" (1/1) ... [2023-08-24 11:15:57,969 INFO L138 Inliner]: procedures = 171, calls = 24, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 78 [2023-08-24 11:15:57,969 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 11:15:57,970 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 11:15:57,970 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 11:15:57,970 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 11:15:57,977 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:15:57" (1/1) ... [2023-08-24 11:15:57,978 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:15:57" (1/1) ... [2023-08-24 11:15:57,985 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:15:57" (1/1) ... [2023-08-24 11:15:57,986 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:15:57" (1/1) ... [2023-08-24 11:15:57,991 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:15:57" (1/1) ... [2023-08-24 11:15:57,994 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:15:57" (1/1) ... [2023-08-24 11:15:57,999 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:15:57" (1/1) ... [2023-08-24 11:15:58,000 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:15:57" (1/1) ... [2023-08-24 11:15:58,005 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 11:15:58,006 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 11:15:58,006 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 11:15:58,006 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 11:15:58,006 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:15:57" (1/1) ... [2023-08-24 11:15:58,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 11:15:58,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 11:15:58,034 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) [2023-08-24 11:15:58,049 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 [2023-08-24 11:15:58,074 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 11:15:58,074 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-24 11:15:58,074 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-24 11:15:58,075 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 11:15:58,075 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 11:15:58,075 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 11:15:58,075 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 11:15:58,075 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 11:15:58,076 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 11:15:58,076 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 11:15:58,077 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-24 11:15:58,200 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 11:15:58,201 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 11:15:58,405 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 11:15:58,430 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 11:15:58,431 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-24 11:15:58,433 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 11:15:58 BoogieIcfgContainer [2023-08-24 11:15:58,433 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 11:15:58,435 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 11:15:58,435 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 11:15:58,438 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 11:15:58,438 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 11:15:57" (1/3) ... [2023-08-24 11:15:58,439 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@203d52ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 11:15:58, skipping insertion in model container [2023-08-24 11:15:58,439 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:15:57" (2/3) ... [2023-08-24 11:15:58,439 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@203d52ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 11:15:58, skipping insertion in model container [2023-08-24 11:15:58,440 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 11:15:58" (3/3) ... [2023-08-24 11:15:58,441 INFO L112 eAbstractionObserver]: Analyzing ICFG 09_fmaxsym.i [2023-08-24 11:15:58,459 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 11:15:58,459 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 11:15:58,459 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 11:15:58,534 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-24 11:15:58,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 69 places, 72 transitions, 149 flow [2023-08-24 11:15:58,617 INFO L124 PetriNetUnfolderBase]: 7/82 cut-off events. [2023-08-24 11:15:58,617 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 11:15:58,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 82 events. 7/82 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 67 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 50. Up to 4 conditions per place. [2023-08-24 11:15:58,622 INFO L82 GeneralOperation]: Start removeDead. Operand has 69 places, 72 transitions, 149 flow [2023-08-24 11:15:58,625 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 69 places, 72 transitions, 149 flow [2023-08-24 11:15:58,628 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 11:15:58,636 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 69 places, 72 transitions, 149 flow [2023-08-24 11:15:58,638 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 69 places, 72 transitions, 149 flow [2023-08-24 11:15:58,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 69 places, 72 transitions, 149 flow [2023-08-24 11:15:58,657 INFO L124 PetriNetUnfolderBase]: 7/82 cut-off events. [2023-08-24 11:15:58,657 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 11:15:58,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 82 events. 7/82 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 67 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 50. Up to 4 conditions per place. [2023-08-24 11:15:58,659 INFO L119 LiptonReduction]: Number of co-enabled transitions 988 [2023-08-24 11:16:01,254 INFO L134 LiptonReduction]: Checked pairs total: 1018 [2023-08-24 11:16:01,255 INFO L136 LiptonReduction]: Total number of compositions: 77 [2023-08-24 11:16:01,266 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 11:16:01,272 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=LoopsAndPotentialCycles, 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;@94b62c2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 11:16:01,272 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-24 11:16:01,275 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 11:16:01,276 INFO L124 PetriNetUnfolderBase]: 1/10 cut-off events. [2023-08-24 11:16:01,276 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 11:16:01,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:16:01,276 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-24 11:16:01,277 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 11:16:01,280 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:16:01,281 INFO L85 PathProgramCache]: Analyzing trace with hash 339243402, now seen corresponding path program 1 times [2023-08-24 11:16:01,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:16:01,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600737633] [2023-08-24 11:16:01,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:16:01,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:16:01,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:16:01,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 11:16:01,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:16:01,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600737633] [2023-08-24 11:16:01,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600737633] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 11:16:01,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 11:16:01,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-24 11:16:01,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112554007] [2023-08-24 11:16:01,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 11:16:01,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-24 11:16:01,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:16:01,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-24 11:16:01,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-24 11:16:01,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 149 [2023-08-24 11:16:01,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 12 places, 10 transitions, 25 flow. Second operand has 2 states, 2 states have (on average 65.5) internal successors, (131), 2 states have internal predecessors, (131), 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) [2023-08-24 11:16:01,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:16:01,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 149 [2023-08-24 11:16:01,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:16:01,485 INFO L124 PetriNetUnfolderBase]: 7/19 cut-off events. [2023-08-24 11:16:01,485 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 11:16:01,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43 conditions, 19 events. 7/19 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 23 event pairs, 4 based on Foata normal form. 0/16 useless extension candidates. Maximal degree in co-relation 30. Up to 19 conditions per place. [2023-08-24 11:16:01,486 INFO L140 encePairwiseOnDemand]: 147/149 looper letters, 0 selfloop transitions, 0 changer transitions 8/8 dead transitions. [2023-08-24 11:16:01,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 11 places, 8 transitions, 35 flow [2023-08-24 11:16:01,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-24 11:16:01,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-24 11:16:01,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 135 transitions. [2023-08-24 11:16:01,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45302013422818793 [2023-08-24 11:16:01,505 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 135 transitions. [2023-08-24 11:16:01,505 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 135 transitions. [2023-08-24 11:16:01,507 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 11:16:01,509 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 135 transitions. [2023-08-24 11:16:01,516 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 67.5) internal successors, (135), 2 states have internal predecessors, (135), 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) [2023-08-24 11:16:01,520 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 149.0) internal successors, (447), 3 states have internal predecessors, (447), 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) [2023-08-24 11:16:01,521 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 149.0) internal successors, (447), 3 states have internal predecessors, (447), 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) [2023-08-24 11:16:01,523 INFO L175 Difference]: Start difference. First operand has 12 places, 10 transitions, 25 flow. Second operand 2 states and 135 transitions. [2023-08-24 11:16:01,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 11 places, 8 transitions, 35 flow [2023-08-24 11:16:01,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 11 places, 8 transitions, 35 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 11:16:01,526 INFO L231 Difference]: Finished difference. Result has 11 places, 0 transitions, 0 flow [2023-08-24 11:16:01,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=149, PETRI_DIFFERENCE_MINUEND_FLOW=21, PETRI_DIFFERENCE_MINUEND_PLACES=10, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=8, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=0, PETRI_PLACES=11, PETRI_TRANSITIONS=0} [2023-08-24 11:16:01,530 INFO L281 CegarLoopForPetriNet]: 12 programPoint places, -1 predicate places. [2023-08-24 11:16:01,531 INFO L495 AbstractCegarLoop]: Abstraction has has 11 places, 0 transitions, 0 flow [2023-08-24 11:16:01,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 65.5) internal successors, (131), 2 states have internal predecessors, (131), 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) [2023-08-24 11:16:01,533 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2023-08-24 11:16:01,534 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-08-24 11:16:01,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 11:16:01,534 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-24 11:16:01,536 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE (1/2) [2023-08-24 11:16:01,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 69 places, 72 transitions, 149 flow [2023-08-24 11:16:01,552 INFO L124 PetriNetUnfolderBase]: 7/82 cut-off events. [2023-08-24 11:16:01,552 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 11:16:01,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 82 events. 7/82 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 67 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 50. Up to 4 conditions per place. [2023-08-24 11:16:01,553 INFO L82 GeneralOperation]: Start removeDead. Operand has 69 places, 72 transitions, 149 flow [2023-08-24 11:16:01,554 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 69 places, 72 transitions, 149 flow [2023-08-24 11:16:01,554 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 11:16:01,554 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 69 places, 72 transitions, 149 flow [2023-08-24 11:16:01,554 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 69 places, 72 transitions, 149 flow [2023-08-24 11:16:01,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 69 places, 72 transitions, 149 flow [2023-08-24 11:16:01,564 INFO L124 PetriNetUnfolderBase]: 7/82 cut-off events. [2023-08-24 11:16:01,564 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 11:16:01,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 82 events. 7/82 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 67 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 50. Up to 4 conditions per place. [2023-08-24 11:16:01,570 INFO L119 LiptonReduction]: Number of co-enabled transitions 988 [2023-08-24 11:16:03,641 INFO L134 LiptonReduction]: Checked pairs total: 1008 [2023-08-24 11:16:03,641 INFO L136 LiptonReduction]: Total number of compositions: 77 [2023-08-24 11:16:03,643 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-24 11:16:03,644 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=LoopsAndPotentialCycles, 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;@94b62c2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 11:16:03,644 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 11:16:03,647 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 11:16:03,647 INFO L124 PetriNetUnfolderBase]: 1/11 cut-off events. [2023-08-24 11:16:03,647 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 11:16:03,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:16:03,647 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-24 11:16:03,648 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 11:16:03,648 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:16:03,648 INFO L85 PathProgramCache]: Analyzing trace with hash -62301113, now seen corresponding path program 1 times [2023-08-24 11:16:03,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:16:03,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428753701] [2023-08-24 11:16:03,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:16:03,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:16:03,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 11:16:03,673 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 11:16:03,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 11:16:03,718 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 11:16:03,718 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 11:16:03,719 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-24 11:16:03,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-24 11:16:03,719 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-24 11:16:03,724 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-24 11:16:03,725 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 11:16:03,725 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-24 11:16:03,751 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-24 11:16:03,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 111 transitions, 234 flow [2023-08-24 11:16:03,771 INFO L124 PetriNetUnfolderBase]: 13/133 cut-off events. [2023-08-24 11:16:03,772 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 11:16:03,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143 conditions, 133 events. 13/133 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 221 event pairs, 0 based on Foata normal form. 0/115 useless extension candidates. Maximal degree in co-relation 88. Up to 6 conditions per place. [2023-08-24 11:16:03,773 INFO L82 GeneralOperation]: Start removeDead. Operand has 105 places, 111 transitions, 234 flow [2023-08-24 11:16:03,774 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 105 places, 111 transitions, 234 flow [2023-08-24 11:16:03,774 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 11:16:03,775 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 105 places, 111 transitions, 234 flow [2023-08-24 11:16:03,775 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 105 places, 111 transitions, 234 flow [2023-08-24 11:16:03,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 111 transitions, 234 flow [2023-08-24 11:16:03,791 INFO L124 PetriNetUnfolderBase]: 13/133 cut-off events. [2023-08-24 11:16:03,791 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 11:16:03,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143 conditions, 133 events. 13/133 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 221 event pairs, 0 based on Foata normal form. 0/115 useless extension candidates. Maximal degree in co-relation 88. Up to 6 conditions per place. [2023-08-24 11:16:03,795 INFO L119 LiptonReduction]: Number of co-enabled transitions 4940 [2023-08-24 11:16:05,570 INFO L134 LiptonReduction]: Checked pairs total: 8769 [2023-08-24 11:16:05,570 INFO L136 LiptonReduction]: Total number of compositions: 101 [2023-08-24 11:16:05,572 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 11:16:05,573 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=LoopsAndPotentialCycles, 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;@94b62c2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 11:16:05,573 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-24 11:16:05,577 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 11:16:05,577 INFO L124 PetriNetUnfolderBase]: 2/20 cut-off events. [2023-08-24 11:16:05,577 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-24 11:16:05,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:16:05,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 11:16:05,578 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 11:16:05,578 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:16:05,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1422340461, now seen corresponding path program 1 times [2023-08-24 11:16:05,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:16:05,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667634005] [2023-08-24 11:16:05,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:16:05,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:16:05,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:16:05,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 11:16:05,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:16:05,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667634005] [2023-08-24 11:16:05,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667634005] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 11:16:05,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 11:16:05,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 11:16:05,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827765960] [2023-08-24 11:16:05,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 11:16:05,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 11:16:05,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:16:05,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 11:16:05,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 11:16:05,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 212 [2023-08-24 11:16:05,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 28 transitions, 68 flow. Second operand has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 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) [2023-08-24 11:16:05,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:16:05,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 212 [2023-08-24 11:16:05,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:16:05,792 INFO L124 PetriNetUnfolderBase]: 409/676 cut-off events. [2023-08-24 11:16:05,792 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2023-08-24 11:16:05,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1381 conditions, 676 events. 409/676 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 3108 event pairs, 181 based on Foata normal form. 0/515 useless extension candidates. Maximal degree in co-relation 854. Up to 428 conditions per place. [2023-08-24 11:16:05,796 INFO L140 encePairwiseOnDemand]: 205/212 looper letters, 34 selfloop transitions, 5 changer transitions 1/43 dead transitions. [2023-08-24 11:16:05,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 43 transitions, 183 flow [2023-08-24 11:16:05,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 11:16:05,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 11:16:05,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 286 transitions. [2023-08-24 11:16:05,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.449685534591195 [2023-08-24 11:16:05,799 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 286 transitions. [2023-08-24 11:16:05,799 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 286 transitions. [2023-08-24 11:16:05,800 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 11:16:05,800 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 286 transitions. [2023-08-24 11:16:05,801 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 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) [2023-08-24 11:16:05,803 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 212.0) internal successors, (848), 4 states have internal predecessors, (848), 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) [2023-08-24 11:16:05,803 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 212.0) internal successors, (848), 4 states have internal predecessors, (848), 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) [2023-08-24 11:16:05,803 INFO L175 Difference]: Start difference. First operand has 29 places, 28 transitions, 68 flow. Second operand 3 states and 286 transitions. [2023-08-24 11:16:05,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 43 transitions, 183 flow [2023-08-24 11:16:05,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 43 transitions, 181 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-24 11:16:05,805 INFO L231 Difference]: Finished difference. Result has 32 places, 30 transitions, 98 flow [2023-08-24 11:16:05,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=32, PETRI_TRANSITIONS=30} [2023-08-24 11:16:05,806 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 3 predicate places. [2023-08-24 11:16:05,806 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 30 transitions, 98 flow [2023-08-24 11:16:05,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 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) [2023-08-24 11:16:05,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:16:05,807 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 11:16:05,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-24 11:16:05,807 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 11:16:05,808 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:16:05,808 INFO L85 PathProgramCache]: Analyzing trace with hash -646009066, now seen corresponding path program 1 times [2023-08-24 11:16:05,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:16:05,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181428437] [2023-08-24 11:16:05,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:16:05,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:16:05,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:16:05,864 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 11:16:05,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:16:05,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181428437] [2023-08-24 11:16:05,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181428437] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 11:16:05,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 11:16:05,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 11:16:05,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327739886] [2023-08-24 11:16:05,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 11:16:05,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 11:16:05,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:16:05,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 11:16:05,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 11:16:05,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 212 [2023-08-24 11:16:05,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 30 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 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) [2023-08-24 11:16:05,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:16:05,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 212 [2023-08-24 11:16:05,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:16:05,981 INFO L124 PetriNetUnfolderBase]: 501/824 cut-off events. [2023-08-24 11:16:05,981 INFO L125 PetriNetUnfolderBase]: For 304/304 co-relation queries the response was YES. [2023-08-24 11:16:05,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1968 conditions, 824 events. 501/824 cut-off events. For 304/304 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3808 event pairs, 221 based on Foata normal form. 0/730 useless extension candidates. Maximal degree in co-relation 1362. Up to 508 conditions per place. [2023-08-24 11:16:05,987 INFO L140 encePairwiseOnDemand]: 206/212 looper letters, 36 selfloop transitions, 6 changer transitions 2/47 dead transitions. [2023-08-24 11:16:05,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 47 transitions, 242 flow [2023-08-24 11:16:05,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 11:16:05,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 11:16:05,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 283 transitions. [2023-08-24 11:16:05,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4449685534591195 [2023-08-24 11:16:05,990 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 283 transitions. [2023-08-24 11:16:05,990 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 283 transitions. [2023-08-24 11:16:05,991 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 11:16:05,991 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 283 transitions. [2023-08-24 11:16:05,992 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 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) [2023-08-24 11:16:05,994 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 212.0) internal successors, (848), 4 states have internal predecessors, (848), 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) [2023-08-24 11:16:05,995 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 212.0) internal successors, (848), 4 states have internal predecessors, (848), 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) [2023-08-24 11:16:05,996 INFO L175 Difference]: Start difference. First operand has 32 places, 30 transitions, 98 flow. Second operand 3 states and 283 transitions. [2023-08-24 11:16:05,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 47 transitions, 242 flow [2023-08-24 11:16:05,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 47 transitions, 224 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-24 11:16:05,999 INFO L231 Difference]: Finished difference. Result has 34 places, 33 transitions, 128 flow [2023-08-24 11:16:05,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=34, PETRI_TRANSITIONS=33} [2023-08-24 11:16:06,001 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 5 predicate places. [2023-08-24 11:16:06,001 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 33 transitions, 128 flow [2023-08-24 11:16:06,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 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) [2023-08-24 11:16:06,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:16:06,002 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 11:16:06,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-24 11:16:06,002 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 11:16:06,004 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:16:06,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1399925076, now seen corresponding path program 1 times [2023-08-24 11:16:06,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:16:06,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886733724] [2023-08-24 11:16:06,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:16:06,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:16:06,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:16:06,133 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 11:16:06,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:16:06,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886733724] [2023-08-24 11:16:06,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886733724] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 11:16:06,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 11:16:06,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 11:16:06,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180300685] [2023-08-24 11:16:06,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 11:16:06,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 11:16:06,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:16:06,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 11:16:06,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 11:16:06,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 212 [2023-08-24 11:16:06,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 33 transitions, 128 flow. Second operand has 5 states, 5 states have (on average 81.0) internal successors, (405), 5 states have internal predecessors, (405), 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) [2023-08-24 11:16:06,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:16:06,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 212 [2023-08-24 11:16:06,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:16:06,353 INFO L124 PetriNetUnfolderBase]: 727/1198 cut-off events. [2023-08-24 11:16:06,353 INFO L125 PetriNetUnfolderBase]: For 530/530 co-relation queries the response was YES. [2023-08-24 11:16:06,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3121 conditions, 1198 events. 727/1198 cut-off events. For 530/530 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 6026 event pairs, 227 based on Foata normal form. 0/1177 useless extension candidates. Maximal degree in co-relation 2454. Up to 538 conditions per place. [2023-08-24 11:16:06,359 INFO L140 encePairwiseOnDemand]: 203/212 looper letters, 54 selfloop transitions, 16 changer transitions 6/79 dead transitions. [2023-08-24 11:16:06,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 79 transitions, 445 flow [2023-08-24 11:16:06,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 11:16:06,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 11:16:06,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 538 transitions. [2023-08-24 11:16:06,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4229559748427673 [2023-08-24 11:16:06,362 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 538 transitions. [2023-08-24 11:16:06,362 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 538 transitions. [2023-08-24 11:16:06,363 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 11:16:06,363 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 538 transitions. [2023-08-24 11:16:06,364 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 89.66666666666667) internal successors, (538), 6 states have internal predecessors, (538), 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) [2023-08-24 11:16:06,366 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 212.0) internal successors, (1484), 7 states have internal predecessors, (1484), 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) [2023-08-24 11:16:06,367 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 212.0) internal successors, (1484), 7 states have internal predecessors, (1484), 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) [2023-08-24 11:16:06,367 INFO L175 Difference]: Start difference. First operand has 34 places, 33 transitions, 128 flow. Second operand 6 states and 538 transitions. [2023-08-24 11:16:06,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 79 transitions, 445 flow [2023-08-24 11:16:06,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 79 transitions, 415 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-24 11:16:06,371 INFO L231 Difference]: Finished difference. Result has 41 places, 45 transitions, 240 flow [2023-08-24 11:16:06,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=240, PETRI_PLACES=41, PETRI_TRANSITIONS=45} [2023-08-24 11:16:06,372 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 12 predicate places. [2023-08-24 11:16:06,372 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 45 transitions, 240 flow [2023-08-24 11:16:06,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 81.0) internal successors, (405), 5 states have internal predecessors, (405), 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) [2023-08-24 11:16:06,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:16:06,373 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 11:16:06,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-24 11:16:06,373 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 11:16:06,373 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:16:06,373 INFO L85 PathProgramCache]: Analyzing trace with hash -822908724, now seen corresponding path program 2 times [2023-08-24 11:16:06,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:16:06,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502242864] [2023-08-24 11:16:06,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:16:06,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:16:06,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:16:06,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 11:16:06,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:16:06,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502242864] [2023-08-24 11:16:06,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502242864] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 11:16:06,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 11:16:06,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 11:16:06,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52341040] [2023-08-24 11:16:06,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 11:16:06,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 11:16:06,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:16:06,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 11:16:06,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-24 11:16:06,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 212 [2023-08-24 11:16:06,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 45 transitions, 240 flow. Second operand has 5 states, 5 states have (on average 81.0) internal successors, (405), 5 states have internal predecessors, (405), 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) [2023-08-24 11:16:06,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:16:06,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 212 [2023-08-24 11:16:06,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:16:06,770 INFO L124 PetriNetUnfolderBase]: 1059/1750 cut-off events. [2023-08-24 11:16:06,770 INFO L125 PetriNetUnfolderBase]: For 1856/1856 co-relation queries the response was YES. [2023-08-24 11:16:06,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5166 conditions, 1750 events. 1059/1750 cut-off events. For 1856/1856 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 9501 event pairs, 481 based on Foata normal form. 22/1764 useless extension candidates. Maximal degree in co-relation 4470. Up to 1140 conditions per place. [2023-08-24 11:16:06,778 INFO L140 encePairwiseOnDemand]: 203/212 looper letters, 65 selfloop transitions, 37 changer transitions 5/110 dead transitions. [2023-08-24 11:16:06,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 110 transitions, 795 flow [2023-08-24 11:16:06,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 11:16:06,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 11:16:06,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 618 transitions. [2023-08-24 11:16:06,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4164420485175202 [2023-08-24 11:16:06,781 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 618 transitions. [2023-08-24 11:16:06,781 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 618 transitions. [2023-08-24 11:16:06,781 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 11:16:06,781 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 618 transitions. [2023-08-24 11:16:06,783 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 88.28571428571429) internal successors, (618), 7 states have internal predecessors, (618), 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) [2023-08-24 11:16:06,785 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 212.0) internal successors, (1696), 8 states have internal predecessors, (1696), 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) [2023-08-24 11:16:06,787 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 212.0) internal successors, (1696), 8 states have internal predecessors, (1696), 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) [2023-08-24 11:16:06,787 INFO L175 Difference]: Start difference. First operand has 41 places, 45 transitions, 240 flow. Second operand 7 states and 618 transitions. [2023-08-24 11:16:06,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 110 transitions, 795 flow [2023-08-24 11:16:06,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 110 transitions, 795 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 11:16:06,795 INFO L231 Difference]: Finished difference. Result has 52 places, 76 transitions, 638 flow [2023-08-24 11:16:06,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=638, PETRI_PLACES=52, PETRI_TRANSITIONS=76} [2023-08-24 11:16:06,796 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 23 predicate places. [2023-08-24 11:16:06,796 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 76 transitions, 638 flow [2023-08-24 11:16:06,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 81.0) internal successors, (405), 5 states have internal predecessors, (405), 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) [2023-08-24 11:16:06,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:16:06,797 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 11:16:06,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-24 11:16:06,797 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 11:16:06,797 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:16:06,798 INFO L85 PathProgramCache]: Analyzing trace with hash -992714895, now seen corresponding path program 1 times [2023-08-24 11:16:06,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:16:06,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048952236] [2023-08-24 11:16:06,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:16:06,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:16:06,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:16:06,866 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 11:16:06,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:16:06,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048952236] [2023-08-24 11:16:06,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048952236] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 11:16:06,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 11:16:06,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 11:16:06,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496225527] [2023-08-24 11:16:06,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 11:16:06,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 11:16:06,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:16:06,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 11:16:06,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-24 11:16:06,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 212 [2023-08-24 11:16:06,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 76 transitions, 638 flow. Second operand has 5 states, 5 states have (on average 81.0) internal successors, (405), 5 states have internal predecessors, (405), 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) [2023-08-24 11:16:06,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:16:06,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 212 [2023-08-24 11:16:06,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:16:07,185 INFO L124 PetriNetUnfolderBase]: 1317/2184 cut-off events. [2023-08-24 11:16:07,185 INFO L125 PetriNetUnfolderBase]: For 4282/4282 co-relation queries the response was YES. [2023-08-24 11:16:07,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7358 conditions, 2184 events. 1317/2184 cut-off events. For 4282/4282 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 12695 event pairs, 701 based on Foata normal form. 22/2199 useless extension candidates. Maximal degree in co-relation 6668. Up to 1724 conditions per place. [2023-08-24 11:16:07,199 INFO L140 encePairwiseOnDemand]: 203/212 looper letters, 101 selfloop transitions, 22 changer transitions 5/131 dead transitions. [2023-08-24 11:16:07,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 131 transitions, 1173 flow [2023-08-24 11:16:07,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 11:16:07,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 11:16:07,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 619 transitions. [2023-08-24 11:16:07,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4171159029649596 [2023-08-24 11:16:07,202 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 619 transitions. [2023-08-24 11:16:07,202 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 619 transitions. [2023-08-24 11:16:07,203 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 11:16:07,203 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 619 transitions. [2023-08-24 11:16:07,204 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 88.42857142857143) internal successors, (619), 7 states have internal predecessors, (619), 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) [2023-08-24 11:16:07,207 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 212.0) internal successors, (1696), 8 states have internal predecessors, (1696), 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) [2023-08-24 11:16:07,207 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 212.0) internal successors, (1696), 8 states have internal predecessors, (1696), 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) [2023-08-24 11:16:07,207 INFO L175 Difference]: Start difference. First operand has 52 places, 76 transitions, 638 flow. Second operand 7 states and 619 transitions. [2023-08-24 11:16:07,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 131 transitions, 1173 flow [2023-08-24 11:16:07,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 131 transitions, 1169 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-08-24 11:16:07,223 INFO L231 Difference]: Finished difference. Result has 62 places, 98 transitions, 904 flow [2023-08-24 11:16:07,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=636, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=904, PETRI_PLACES=62, PETRI_TRANSITIONS=98} [2023-08-24 11:16:07,224 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 33 predicate places. [2023-08-24 11:16:07,224 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 98 transitions, 904 flow [2023-08-24 11:16:07,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 81.0) internal successors, (405), 5 states have internal predecessors, (405), 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) [2023-08-24 11:16:07,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:16:07,224 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 11:16:07,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-24 11:16:07,225 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 11:16:07,225 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:16:07,225 INFO L85 PathProgramCache]: Analyzing trace with hash -822015939, now seen corresponding path program 2 times [2023-08-24 11:16:07,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:16:07,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531356393] [2023-08-24 11:16:07,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:16:07,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:16:07,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:16:07,276 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 11:16:07,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:16:07,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531356393] [2023-08-24 11:16:07,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531356393] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 11:16:07,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 11:16:07,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 11:16:07,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643517711] [2023-08-24 11:16:07,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 11:16:07,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 11:16:07,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:16:07,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 11:16:07,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 11:16:07,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 212 [2023-08-24 11:16:07,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 98 transitions, 904 flow. Second operand has 5 states, 5 states have (on average 81.0) internal successors, (405), 5 states have internal predecessors, (405), 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) [2023-08-24 11:16:07,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:16:07,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 212 [2023-08-24 11:16:07,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:16:07,653 INFO L124 PetriNetUnfolderBase]: 1617/2676 cut-off events. [2023-08-24 11:16:07,653 INFO L125 PetriNetUnfolderBase]: For 6922/6922 co-relation queries the response was YES. [2023-08-24 11:16:07,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9781 conditions, 2676 events. 1617/2676 cut-off events. For 6922/6922 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 16266 event pairs, 441 based on Foata normal form. 22/2690 useless extension candidates. Maximal degree in co-relation 9216. Up to 1182 conditions per place. [2023-08-24 11:16:07,671 INFO L140 encePairwiseOnDemand]: 203/212 looper letters, 105 selfloop transitions, 51 changer transitions 6/165 dead transitions. [2023-08-24 11:16:07,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 165 transitions, 1715 flow [2023-08-24 11:16:07,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 11:16:07,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 11:16:07,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 537 transitions. [2023-08-24 11:16:07,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4221698113207547 [2023-08-24 11:16:07,674 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 537 transitions. [2023-08-24 11:16:07,674 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 537 transitions. [2023-08-24 11:16:07,675 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 11:16:07,675 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 537 transitions. [2023-08-24 11:16:07,676 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 89.5) internal successors, (537), 6 states have internal predecessors, (537), 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) [2023-08-24 11:16:07,678 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 212.0) internal successors, (1484), 7 states have internal predecessors, (1484), 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) [2023-08-24 11:16:07,679 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 212.0) internal successors, (1484), 7 states have internal predecessors, (1484), 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) [2023-08-24 11:16:07,679 INFO L175 Difference]: Start difference. First operand has 62 places, 98 transitions, 904 flow. Second operand 6 states and 537 transitions. [2023-08-24 11:16:07,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 165 transitions, 1715 flow [2023-08-24 11:16:07,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 165 transitions, 1665 flow, removed 25 selfloop flow, removed 0 redundant places. [2023-08-24 11:16:07,705 INFO L231 Difference]: Finished difference. Result has 72 places, 123 transitions, 1333 flow [2023-08-24 11:16:07,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=876, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1333, PETRI_PLACES=72, PETRI_TRANSITIONS=123} [2023-08-24 11:16:07,705 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 43 predicate places. [2023-08-24 11:16:07,706 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 123 transitions, 1333 flow [2023-08-24 11:16:07,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 81.0) internal successors, (405), 5 states have internal predecessors, (405), 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) [2023-08-24 11:16:07,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:16:07,706 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 11:16:07,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-24 11:16:07,706 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 11:16:07,707 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:16:07,707 INFO L85 PathProgramCache]: Analyzing trace with hash 447898056, now seen corresponding path program 1 times [2023-08-24 11:16:07,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:16:07,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324447161] [2023-08-24 11:16:07,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:16:07,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:16:07,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:16:07,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 11:16:07,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:16:07,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324447161] [2023-08-24 11:16:07,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324447161] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 11:16:07,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 11:16:07,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-24 11:16:07,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186115231] [2023-08-24 11:16:07,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 11:16:07,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 11:16:07,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:16:07,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 11:16:07,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 11:16:07,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 212 [2023-08-24 11:16:07,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 123 transitions, 1333 flow. Second operand has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 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) [2023-08-24 11:16:07,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:16:07,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 212 [2023-08-24 11:16:07,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:16:07,923 INFO L124 PetriNetUnfolderBase]: 668/1209 cut-off events. [2023-08-24 11:16:07,924 INFO L125 PetriNetUnfolderBase]: For 4240/4244 co-relation queries the response was YES. [2023-08-24 11:16:07,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4710 conditions, 1209 events. 668/1209 cut-off events. For 4240/4244 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 6488 event pairs, 310 based on Foata normal form. 4/1202 useless extension candidates. Maximal degree in co-relation 4618. Up to 799 conditions per place. [2023-08-24 11:16:07,929 INFO L140 encePairwiseOnDemand]: 208/212 looper letters, 0 selfloop transitions, 0 changer transitions 103/103 dead transitions. [2023-08-24 11:16:07,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 103 transitions, 1116 flow [2023-08-24 11:16:07,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 11:16:07,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 11:16:07,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 310 transitions. [2023-08-24 11:16:07,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48742138364779874 [2023-08-24 11:16:07,931 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 310 transitions. [2023-08-24 11:16:07,931 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 310 transitions. [2023-08-24 11:16:07,931 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 11:16:07,931 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 310 transitions. [2023-08-24 11:16:07,932 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 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) [2023-08-24 11:16:07,933 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 212.0) internal successors, (848), 4 states have internal predecessors, (848), 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) [2023-08-24 11:16:07,934 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 212.0) internal successors, (848), 4 states have internal predecessors, (848), 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) [2023-08-24 11:16:07,934 INFO L175 Difference]: Start difference. First operand has 72 places, 123 transitions, 1333 flow. Second operand 3 states and 310 transitions. [2023-08-24 11:16:07,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 103 transitions, 1116 flow [2023-08-24 11:16:07,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 103 transitions, 967 flow, removed 39 selfloop flow, removed 8 redundant places. [2023-08-24 11:16:07,947 INFO L231 Difference]: Finished difference. Result has 64 places, 0 transitions, 0 flow [2023-08-24 11:16:07,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=627, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=64, PETRI_TRANSITIONS=0} [2023-08-24 11:16:07,948 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 35 predicate places. [2023-08-24 11:16:07,948 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 0 transitions, 0 flow [2023-08-24 11:16:07,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 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) [2023-08-24 11:16:07,948 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-08-24 11:16:07,948 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-08-24 11:16:07,948 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-08-24 11:16:07,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-24 11:16:07,949 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1] [2023-08-24 11:16:07,949 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE (1/2) [2023-08-24 11:16:07,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 111 transitions, 234 flow [2023-08-24 11:16:07,959 INFO L124 PetriNetUnfolderBase]: 13/133 cut-off events. [2023-08-24 11:16:07,959 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 11:16:07,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143 conditions, 133 events. 13/133 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 221 event pairs, 0 based on Foata normal form. 0/115 useless extension candidates. Maximal degree in co-relation 88. Up to 6 conditions per place. [2023-08-24 11:16:07,960 INFO L82 GeneralOperation]: Start removeDead. Operand has 105 places, 111 transitions, 234 flow [2023-08-24 11:16:07,961 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 105 places, 111 transitions, 234 flow [2023-08-24 11:16:07,961 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 11:16:07,961 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 105 places, 111 transitions, 234 flow [2023-08-24 11:16:07,961 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 105 places, 111 transitions, 234 flow [2023-08-24 11:16:07,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 111 transitions, 234 flow [2023-08-24 11:16:07,969 INFO L124 PetriNetUnfolderBase]: 13/133 cut-off events. [2023-08-24 11:16:07,970 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 11:16:07,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143 conditions, 133 events. 13/133 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 221 event pairs, 0 based on Foata normal form. 0/115 useless extension candidates. Maximal degree in co-relation 88. Up to 6 conditions per place. [2023-08-24 11:16:07,972 INFO L119 LiptonReduction]: Number of co-enabled transitions 4940 [2023-08-24 11:16:09,751 INFO L134 LiptonReduction]: Checked pairs total: 8245 [2023-08-24 11:16:09,751 INFO L136 LiptonReduction]: Total number of compositions: 100 [2023-08-24 11:16:09,753 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-24 11:16:09,753 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=LoopsAndPotentialCycles, 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;@94b62c2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 11:16:09,753 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 11:16:09,756 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 11:16:09,756 INFO L124 PetriNetUnfolderBase]: 2/27 cut-off events. [2023-08-24 11:16:09,756 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 11:16:09,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:16:09,756 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-24 11:16:09,756 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 11:16:09,757 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:16:09,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1514129062, now seen corresponding path program 1 times [2023-08-24 11:16:09,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:16:09,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234236905] [2023-08-24 11:16:09,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:16:09,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:16:09,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 11:16:09,766 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 11:16:09,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 11:16:09,774 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 11:16:09,774 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 11:16:09,775 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-24 11:16:09,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-24 11:16:09,775 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-24 11:16:09,775 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-24 11:16:09,775 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 11:16:09,776 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-24 11:16:09,794 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-24 11:16:09,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 141 places, 150 transitions, 321 flow [2023-08-24 11:16:09,809 INFO L124 PetriNetUnfolderBase]: 19/184 cut-off events. [2023-08-24 11:16:09,809 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-24 11:16:09,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 200 conditions, 184 events. 19/184 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 421 event pairs, 0 based on Foata normal form. 0/158 useless extension candidates. Maximal degree in co-relation 137. Up to 8 conditions per place. [2023-08-24 11:16:09,810 INFO L82 GeneralOperation]: Start removeDead. Operand has 141 places, 150 transitions, 321 flow [2023-08-24 11:16:09,812 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 141 places, 150 transitions, 321 flow [2023-08-24 11:16:09,812 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 11:16:09,812 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 141 places, 150 transitions, 321 flow [2023-08-24 11:16:09,812 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 141 places, 150 transitions, 321 flow [2023-08-24 11:16:09,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 141 places, 150 transitions, 321 flow [2023-08-24 11:16:09,826 INFO L124 PetriNetUnfolderBase]: 19/184 cut-off events. [2023-08-24 11:16:09,826 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-24 11:16:09,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 200 conditions, 184 events. 19/184 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 421 event pairs, 0 based on Foata normal form. 0/158 useless extension candidates. Maximal degree in co-relation 137. Up to 8 conditions per place. [2023-08-24 11:16:09,832 INFO L119 LiptonReduction]: Number of co-enabled transitions 11856 [2023-08-24 11:16:12,096 INFO L134 LiptonReduction]: Checked pairs total: 20368 [2023-08-24 11:16:12,096 INFO L136 LiptonReduction]: Total number of compositions: 138 [2023-08-24 11:16:12,097 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 11:16:12,097 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=LoopsAndPotentialCycles, 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;@94b62c2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 11:16:12,097 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-24 11:16:12,099 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 11:16:12,100 INFO L124 PetriNetUnfolderBase]: 2/23 cut-off events. [2023-08-24 11:16:12,100 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-24 11:16:12,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:16:12,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 11:16:12,100 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 11:16:12,100 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:16:12,100 INFO L85 PathProgramCache]: Analyzing trace with hash -26515803, now seen corresponding path program 1 times [2023-08-24 11:16:12,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:16:12,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545829730] [2023-08-24 11:16:12,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:16:12,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:16:12,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:16:12,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 11:16:12,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:16:12,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545829730] [2023-08-24 11:16:12,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545829730] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 11:16:12,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 11:16:12,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 11:16:12,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815557057] [2023-08-24 11:16:12,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 11:16:12,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 11:16:12,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:16:12,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 11:16:12,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 11:16:12,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 288 [2023-08-24 11:16:12,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 39 transitions, 99 flow. Second operand has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 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) [2023-08-24 11:16:12,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:16:12,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 288 [2023-08-24 11:16:12,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:16:12,739 INFO L124 PetriNetUnfolderBase]: 6403/8855 cut-off events. [2023-08-24 11:16:12,740 INFO L125 PetriNetUnfolderBase]: For 787/787 co-relation queries the response was YES. [2023-08-24 11:16:12,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18191 conditions, 8855 events. 6403/8855 cut-off events. For 787/787 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 47938 event pairs, 3065 based on Foata normal form. 0/6602 useless extension candidates. Maximal degree in co-relation 6462. Up to 5896 conditions per place. [2023-08-24 11:16:12,793 INFO L140 encePairwiseOnDemand]: 280/288 looper letters, 56 selfloop transitions, 6 changer transitions 0/65 dead transitions. [2023-08-24 11:16:12,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 65 transitions, 287 flow [2023-08-24 11:16:12,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 11:16:12,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 11:16:12,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 389 transitions. [2023-08-24 11:16:12,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45023148148148145 [2023-08-24 11:16:12,795 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 389 transitions. [2023-08-24 11:16:12,795 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 389 transitions. [2023-08-24 11:16:12,795 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 11:16:12,795 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 389 transitions. [2023-08-24 11:16:12,796 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 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) [2023-08-24 11:16:12,798 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 288.0) internal successors, (1152), 4 states have internal predecessors, (1152), 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) [2023-08-24 11:16:12,798 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 288.0) internal successors, (1152), 4 states have internal predecessors, (1152), 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) [2023-08-24 11:16:12,798 INFO L175 Difference]: Start difference. First operand has 40 places, 39 transitions, 99 flow. Second operand 3 states and 389 transitions. [2023-08-24 11:16:12,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 65 transitions, 287 flow [2023-08-24 11:16:12,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 65 transitions, 279 flow, removed 4 selfloop flow, removed 0 redundant places. [2023-08-24 11:16:12,801 INFO L231 Difference]: Finished difference. Result has 43 places, 42 transitions, 133 flow [2023-08-24 11:16:12,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=133, PETRI_PLACES=43, PETRI_TRANSITIONS=42} [2023-08-24 11:16:12,802 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 3 predicate places. [2023-08-24 11:16:12,802 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 42 transitions, 133 flow [2023-08-24 11:16:12,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 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) [2023-08-24 11:16:12,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:16:12,803 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 11:16:12,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-24 11:16:12,803 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 11:16:12,804 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:16:12,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1801319534, now seen corresponding path program 1 times [2023-08-24 11:16:12,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:16:12,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214848980] [2023-08-24 11:16:12,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:16:12,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:16:12,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:16:12,832 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 11:16:12,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:16:12,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214848980] [2023-08-24 11:16:12,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214848980] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 11:16:12,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 11:16:12,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 11:16:12,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340404555] [2023-08-24 11:16:12,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 11:16:12,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 11:16:12,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:16:12,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 11:16:12,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 11:16:12,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 288 [2023-08-24 11:16:12,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 42 transitions, 133 flow. Second operand has 3 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 states have internal predecessors, (334), 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) [2023-08-24 11:16:12,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:16:12,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 288 [2023-08-24 11:16:12,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:16:13,794 INFO L124 PetriNetUnfolderBase]: 9575/13279 cut-off events. [2023-08-24 11:16:13,794 INFO L125 PetriNetUnfolderBase]: For 4918/4918 co-relation queries the response was YES. [2023-08-24 11:16:13,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30757 conditions, 13279 events. 9575/13279 cut-off events. For 4918/4918 co-relation queries the response was YES. Maximal size of possible extension queue 610. Compared 75228 event pairs, 4266 based on Foata normal form. 0/11115 useless extension candidates. Maximal degree in co-relation 22358. Up to 8137 conditions per place. [2023-08-24 11:16:13,863 INFO L140 encePairwiseOnDemand]: 281/288 looper letters, 61 selfloop transitions, 8 changer transitions 0/72 dead transitions. [2023-08-24 11:16:13,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 72 transitions, 364 flow [2023-08-24 11:16:13,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 11:16:13,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 11:16:13,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 387 transitions. [2023-08-24 11:16:13,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4479166666666667 [2023-08-24 11:16:13,866 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 387 transitions. [2023-08-24 11:16:13,866 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 387 transitions. [2023-08-24 11:16:13,866 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 11:16:13,866 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 387 transitions. [2023-08-24 11:16:13,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 129.0) internal successors, (387), 3 states have internal predecessors, (387), 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) [2023-08-24 11:16:13,868 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 288.0) internal successors, (1152), 4 states have internal predecessors, (1152), 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) [2023-08-24 11:16:13,869 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 288.0) internal successors, (1152), 4 states have internal predecessors, (1152), 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) [2023-08-24 11:16:13,870 INFO L175 Difference]: Start difference. First operand has 43 places, 42 transitions, 133 flow. Second operand 3 states and 387 transitions. [2023-08-24 11:16:13,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 72 transitions, 364 flow [2023-08-24 11:16:13,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 72 transitions, 342 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-24 11:16:13,877 INFO L231 Difference]: Finished difference. Result has 45 places, 47 transitions, 181 flow [2023-08-24 11:16:13,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=121, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=181, PETRI_PLACES=45, PETRI_TRANSITIONS=47} [2023-08-24 11:16:13,879 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 5 predicate places. [2023-08-24 11:16:13,879 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 47 transitions, 181 flow [2023-08-24 11:16:13,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 states have internal predecessors, (334), 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) [2023-08-24 11:16:13,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:16:13,879 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 11:16:13,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-24 11:16:13,879 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 11:16:13,880 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:16:13,880 INFO L85 PathProgramCache]: Analyzing trace with hash -2131348444, now seen corresponding path program 1 times [2023-08-24 11:16:13,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:16:13,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582630829] [2023-08-24 11:16:13,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:16:13,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:16:13,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:16:13,914 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-24 11:16:13,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:16:13,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582630829] [2023-08-24 11:16:13,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582630829] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 11:16:13,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 11:16:13,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 11:16:13,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417441004] [2023-08-24 11:16:13,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 11:16:13,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 11:16:13,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:16:13,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 11:16:13,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 11:16:13,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 288 [2023-08-24 11:16:13,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 47 transitions, 181 flow. Second operand has 3 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 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) [2023-08-24 11:16:13,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:16:13,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 288 [2023-08-24 11:16:13,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:16:15,076 INFO L124 PetriNetUnfolderBase]: 13315/18407 cut-off events. [2023-08-24 11:16:15,076 INFO L125 PetriNetUnfolderBase]: For 9524/9524 co-relation queries the response was YES. [2023-08-24 11:16:15,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45608 conditions, 18407 events. 13315/18407 cut-off events. For 9524/9524 co-relation queries the response was YES. Maximal size of possible extension queue 901. Compared 107894 event pairs, 6049 based on Foata normal form. 0/15995 useless extension candidates. Maximal degree in co-relation 33534. Up to 11232 conditions per place. [2023-08-24 11:16:15,192 INFO L140 encePairwiseOnDemand]: 281/288 looper letters, 65 selfloop transitions, 11 changer transitions 0/79 dead transitions. [2023-08-24 11:16:15,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 79 transitions, 449 flow [2023-08-24 11:16:15,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 11:16:15,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 11:16:15,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 386 transitions. [2023-08-24 11:16:15,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44675925925925924 [2023-08-24 11:16:15,194 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 386 transitions. [2023-08-24 11:16:15,194 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 386 transitions. [2023-08-24 11:16:15,195 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 11:16:15,195 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 386 transitions. [2023-08-24 11:16:15,196 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 128.66666666666666) internal successors, (386), 3 states have internal predecessors, (386), 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) [2023-08-24 11:16:15,198 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 288.0) internal successors, (1152), 4 states have internal predecessors, (1152), 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) [2023-08-24 11:16:15,198 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 288.0) internal successors, (1152), 4 states have internal predecessors, (1152), 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) [2023-08-24 11:16:15,198 INFO L175 Difference]: Start difference. First operand has 45 places, 47 transitions, 181 flow. Second operand 3 states and 386 transitions. [2023-08-24 11:16:15,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 79 transitions, 449 flow [2023-08-24 11:16:15,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 79 transitions, 421 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-24 11:16:15,224 INFO L231 Difference]: Finished difference. Result has 47 places, 53 transitions, 251 flow [2023-08-24 11:16:15,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=251, PETRI_PLACES=47, PETRI_TRANSITIONS=53} [2023-08-24 11:16:15,224 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 7 predicate places. [2023-08-24 11:16:15,224 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 53 transitions, 251 flow [2023-08-24 11:16:15,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 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) [2023-08-24 11:16:15,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:16:15,225 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 11:16:15,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-24 11:16:15,225 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 11:16:15,225 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:16:15,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1250805983, now seen corresponding path program 1 times [2023-08-24 11:16:15,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:16:15,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533991346] [2023-08-24 11:16:15,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:16:15,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:16:15,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:16:15,280 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 11:16:15,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:16:15,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533991346] [2023-08-24 11:16:15,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533991346] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 11:16:15,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 11:16:15,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 11:16:15,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055298432] [2023-08-24 11:16:15,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 11:16:15,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 11:16:15,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:16:15,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 11:16:15,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 11:16:15,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 288 [2023-08-24 11:16:15,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 53 transitions, 251 flow. Second operand has 5 states, 5 states have (on average 108.0) internal successors, (540), 5 states have internal predecessors, (540), 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) [2023-08-24 11:16:15,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:16:15,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 288 [2023-08-24 11:16:15,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:16:17,320 INFO L124 PetriNetUnfolderBase]: 21666/30040 cut-off events. [2023-08-24 11:16:17,321 INFO L125 PetriNetUnfolderBase]: For 20006/20006 co-relation queries the response was YES. [2023-08-24 11:16:17,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79623 conditions, 30040 events. 21666/30040 cut-off events. For 20006/20006 co-relation queries the response was YES. Maximal size of possible extension queue 1241. Compared 189511 event pairs, 7151 based on Foata normal form. 0/26843 useless extension candidates. Maximal degree in co-relation 66828. Up to 12778 conditions per place. [2023-08-24 11:16:17,476 INFO L140 encePairwiseOnDemand]: 277/288 looper letters, 146 selfloop transitions, 39 changer transitions 0/188 dead transitions. [2023-08-24 11:16:17,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 188 transitions, 1190 flow [2023-08-24 11:16:17,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 11:16:17,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 11:16:17,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 888 transitions. [2023-08-24 11:16:17,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2023-08-24 11:16:17,479 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 888 transitions. [2023-08-24 11:16:17,479 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 888 transitions. [2023-08-24 11:16:17,480 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 11:16:17,480 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 888 transitions. [2023-08-24 11:16:17,481 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 126.85714285714286) internal successors, (888), 7 states have internal predecessors, (888), 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) [2023-08-24 11:16:17,485 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 288.0) internal successors, (2304), 8 states have internal predecessors, (2304), 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) [2023-08-24 11:16:17,485 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 288.0) internal successors, (2304), 8 states have internal predecessors, (2304), 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) [2023-08-24 11:16:17,485 INFO L175 Difference]: Start difference. First operand has 47 places, 53 transitions, 251 flow. Second operand 7 states and 888 transitions. [2023-08-24 11:16:17,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 188 transitions, 1190 flow [2023-08-24 11:16:17,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 188 transitions, 1112 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-24 11:16:17,562 INFO L231 Difference]: Finished difference. Result has 57 places, 84 transitions, 603 flow [2023-08-24 11:16:17,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=603, PETRI_PLACES=57, PETRI_TRANSITIONS=84} [2023-08-24 11:16:17,563 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 17 predicate places. [2023-08-24 11:16:17,563 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 84 transitions, 603 flow [2023-08-24 11:16:17,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 108.0) internal successors, (540), 5 states have internal predecessors, (540), 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) [2023-08-24 11:16:17,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:16:17,563 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 11:16:17,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-24 11:16:17,563 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 11:16:17,566 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:16:17,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1259429587, now seen corresponding path program 2 times [2023-08-24 11:16:17,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:16:17,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180477916] [2023-08-24 11:16:17,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:16:17,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:16:17,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:16:17,625 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 11:16:17,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:16:17,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180477916] [2023-08-24 11:16:17,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180477916] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 11:16:17,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 11:16:17,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 11:16:17,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910622610] [2023-08-24 11:16:17,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 11:16:17,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 11:16:17,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:16:17,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 11:16:17,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-24 11:16:17,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 288 [2023-08-24 11:16:17,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 84 transitions, 603 flow. Second operand has 5 states, 5 states have (on average 108.0) internal successors, (540), 5 states have internal predecessors, (540), 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) [2023-08-24 11:16:17,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:16:17,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 288 [2023-08-24 11:16:17,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:16:21,190 INFO L124 PetriNetUnfolderBase]: 34407/48051 cut-off events. [2023-08-24 11:16:21,190 INFO L125 PetriNetUnfolderBase]: For 73582/73582 co-relation queries the response was YES. [2023-08-24 11:16:21,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145372 conditions, 48051 events. 34407/48051 cut-off events. For 73582/73582 co-relation queries the response was YES. Maximal size of possible extension queue 2065. Compared 325400 event pairs, 15547 based on Foata normal form. 374/43897 useless extension candidates. Maximal degree in co-relation 130796. Up to 29630 conditions per place. [2023-08-24 11:16:21,475 INFO L140 encePairwiseOnDemand]: 277/288 looper letters, 192 selfloop transitions, 90 changer transitions 0/285 dead transitions. [2023-08-24 11:16:21,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 285 transitions, 2382 flow [2023-08-24 11:16:21,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 11:16:21,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 11:16:21,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1007 transitions. [2023-08-24 11:16:21,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4370659722222222 [2023-08-24 11:16:21,479 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1007 transitions. [2023-08-24 11:16:21,479 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1007 transitions. [2023-08-24 11:16:21,479 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 11:16:21,479 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1007 transitions. [2023-08-24 11:16:21,482 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 125.875) internal successors, (1007), 8 states have internal predecessors, (1007), 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) [2023-08-24 11:16:21,485 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 288.0) internal successors, (2592), 9 states have internal predecessors, (2592), 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) [2023-08-24 11:16:21,485 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 288.0) internal successors, (2592), 9 states have internal predecessors, (2592), 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) [2023-08-24 11:16:21,485 INFO L175 Difference]: Start difference. First operand has 57 places, 84 transitions, 603 flow. Second operand 8 states and 1007 transitions. [2023-08-24 11:16:21,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 285 transitions, 2382 flow [2023-08-24 11:16:21,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 285 transitions, 2382 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 11:16:21,734 INFO L231 Difference]: Finished difference. Result has 70 places, 169 transitions, 1838 flow [2023-08-24 11:16:21,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=603, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1838, PETRI_PLACES=70, PETRI_TRANSITIONS=169} [2023-08-24 11:16:21,735 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 30 predicate places. [2023-08-24 11:16:21,735 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 169 transitions, 1838 flow [2023-08-24 11:16:21,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 108.0) internal successors, (540), 5 states have internal predecessors, (540), 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) [2023-08-24 11:16:21,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:16:21,735 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 11:16:21,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-24 11:16:21,735 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 11:16:21,736 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:16:21,736 INFO L85 PathProgramCache]: Analyzing trace with hash -558021625, now seen corresponding path program 1 times [2023-08-24 11:16:21,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:16:21,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572557235] [2023-08-24 11:16:21,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:16:21,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:16:21,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:16:21,795 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 11:16:21,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:16:21,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572557235] [2023-08-24 11:16:21,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572557235] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 11:16:21,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 11:16:21,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 11:16:21,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488121076] [2023-08-24 11:16:21,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 11:16:21,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 11:16:21,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:16:21,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 11:16:21,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-24 11:16:21,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 288 [2023-08-24 11:16:21,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 169 transitions, 1838 flow. Second operand has 5 states, 5 states have (on average 108.0) internal successors, (540), 5 states have internal predecessors, (540), 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) [2023-08-24 11:16:21,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:16:21,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 288 [2023-08-24 11:16:21,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:16:27,247 INFO L124 PetriNetUnfolderBase]: 46600/65359 cut-off events. [2023-08-24 11:16:27,247 INFO L125 PetriNetUnfolderBase]: For 183502/183502 co-relation queries the response was YES. [2023-08-24 11:16:27,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 223237 conditions, 65359 events. 46600/65359 cut-off events. For 183502/183502 co-relation queries the response was YES. Maximal size of possible extension queue 3014. Compared 468711 event pairs, 24306 based on Foata normal form. 344/59177 useless extension candidates. Maximal degree in co-relation 207370. Up to 47899 conditions per place. [2023-08-24 11:16:27,818 INFO L140 encePairwiseOnDemand]: 277/288 looper letters, 283 selfloop transitions, 71 changer transitions 0/357 dead transitions. [2023-08-24 11:16:27,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 357 transitions, 3830 flow [2023-08-24 11:16:27,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 11:16:27,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 11:16:27,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1010 transitions. [2023-08-24 11:16:27,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4383680555555556 [2023-08-24 11:16:27,822 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1010 transitions. [2023-08-24 11:16:27,822 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1010 transitions. [2023-08-24 11:16:27,822 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 11:16:27,823 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1010 transitions. [2023-08-24 11:16:27,825 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 126.25) internal successors, (1010), 8 states have internal predecessors, (1010), 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) [2023-08-24 11:16:27,828 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 288.0) internal successors, (2592), 9 states have internal predecessors, (2592), 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) [2023-08-24 11:16:27,828 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 288.0) internal successors, (2592), 9 states have internal predecessors, (2592), 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) [2023-08-24 11:16:27,828 INFO L175 Difference]: Start difference. First operand has 70 places, 169 transitions, 1838 flow. Second operand 8 states and 1010 transitions. [2023-08-24 11:16:27,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 357 transitions, 3830 flow [2023-08-24 11:16:29,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 357 transitions, 3752 flow, removed 39 selfloop flow, removed 0 redundant places. [2023-08-24 11:16:29,024 INFO L231 Difference]: Finished difference. Result has 83 places, 240 transitions, 2942 flow [2023-08-24 11:16:29,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=1776, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2942, PETRI_PLACES=83, PETRI_TRANSITIONS=240} [2023-08-24 11:16:29,025 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 43 predicate places. [2023-08-24 11:16:29,025 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 240 transitions, 2942 flow [2023-08-24 11:16:29,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 108.0) internal successors, (540), 5 states have internal predecessors, (540), 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) [2023-08-24 11:16:29,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:16:29,025 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 11:16:29,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-24 11:16:29,026 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 11:16:29,026 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:16:29,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1258536795, now seen corresponding path program 2 times [2023-08-24 11:16:29,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:16:29,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191005180] [2023-08-24 11:16:29,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:16:29,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:16:29,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:16:29,081 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 11:16:29,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:16:29,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191005180] [2023-08-24 11:16:29,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191005180] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 11:16:29,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 11:16:29,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 11:16:29,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292873482] [2023-08-24 11:16:29,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 11:16:29,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 11:16:29,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:16:29,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 11:16:29,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 11:16:29,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 288 [2023-08-24 11:16:29,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 240 transitions, 2942 flow. Second operand has 5 states, 5 states have (on average 108.0) internal successors, (540), 5 states have internal predecessors, (540), 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) [2023-08-24 11:16:29,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:16:29,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 288 [2023-08-24 11:16:29,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:16:37,300 INFO L124 PetriNetUnfolderBase]: 60710/85146 cut-off events. [2023-08-24 11:16:37,300 INFO L125 PetriNetUnfolderBase]: For 331797/331797 co-relation queries the response was YES. [2023-08-24 11:16:37,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 311973 conditions, 85146 events. 60710/85146 cut-off events. For 331797/331797 co-relation queries the response was YES. Maximal size of possible extension queue 4188. Compared 632587 event pairs, 18404 based on Foata normal form. 330/76500 useless extension candidates. Maximal degree in co-relation 294571. Up to 36253 conditions per place. [2023-08-24 11:16:38,142 INFO L140 encePairwiseOnDemand]: 277/288 looper letters, 280 selfloop transitions, 160 changer transitions 0/443 dead transitions. [2023-08-24 11:16:38,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 443 transitions, 5628 flow [2023-08-24 11:16:38,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 11:16:38,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 11:16:38,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 889 transitions. [2023-08-24 11:16:38,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4409722222222222 [2023-08-24 11:16:38,145 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 889 transitions. [2023-08-24 11:16:38,145 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 889 transitions. [2023-08-24 11:16:38,145 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 11:16:38,146 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 889 transitions. [2023-08-24 11:16:38,147 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 127.0) internal successors, (889), 7 states have internal predecessors, (889), 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) [2023-08-24 11:16:38,150 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 288.0) internal successors, (2304), 8 states have internal predecessors, (2304), 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) [2023-08-24 11:16:38,150 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 288.0) internal successors, (2304), 8 states have internal predecessors, (2304), 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) [2023-08-24 11:16:38,150 INFO L175 Difference]: Start difference. First operand has 83 places, 240 transitions, 2942 flow. Second operand 7 states and 889 transitions. [2023-08-24 11:16:38,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 443 transitions, 5628 flow [2023-08-24 11:16:42,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 443 transitions, 5374 flow, removed 127 selfloop flow, removed 0 redundant places. [2023-08-24 11:16:42,223 INFO L231 Difference]: Finished difference. Result has 95 places, 315 transitions, 4499 flow [2023-08-24 11:16:42,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=2796, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4499, PETRI_PLACES=95, PETRI_TRANSITIONS=315} [2023-08-24 11:16:42,224 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 55 predicate places. [2023-08-24 11:16:42,224 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 315 transitions, 4499 flow [2023-08-24 11:16:42,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 108.0) internal successors, (540), 5 states have internal predecessors, (540), 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) [2023-08-24 11:16:42,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:16:42,225 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 11:16:42,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-24 11:16:42,225 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 11:16:42,225 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:16:42,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1441415360, now seen corresponding path program 1 times [2023-08-24 11:16:42,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:16:42,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120683775] [2023-08-24 11:16:42,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:16:42,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:16:42,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:16:42,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 11:16:42,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:16:42,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120683775] [2023-08-24 11:16:42,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120683775] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 11:16:42,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 11:16:42,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-24 11:16:42,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116556918] [2023-08-24 11:16:42,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 11:16:42,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 11:16:42,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:16:42,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 11:16:42,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 11:16:42,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 288 [2023-08-24 11:16:42,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 315 transitions, 4499 flow. Second operand has 3 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 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) [2023-08-24 11:16:42,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:16:42,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 288 [2023-08-24 11:16:42,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:16:46,140 INFO L124 PetriNetUnfolderBase]: 24061/37396 cut-off events. [2023-08-24 11:16:46,140 INFO L125 PetriNetUnfolderBase]: For 207103/207281 co-relation queries the response was YES. [2023-08-24 11:16:46,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141741 conditions, 37396 events. 24061/37396 cut-off events. For 207103/207281 co-relation queries the response was YES. Maximal size of possible extension queue 1889. Compared 291790 event pairs, 11013 based on Foata normal form. 1250/33732 useless extension candidates. Maximal degree in co-relation 128523. Up to 22234 conditions per place. [2023-08-24 11:16:46,522 INFO L140 encePairwiseOnDemand]: 282/288 looper letters, 159 selfloop transitions, 37 changer transitions 0/295 dead transitions. [2023-08-24 11:16:46,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 295 transitions, 4196 flow [2023-08-24 11:16:46,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 11:16:46,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 11:16:46,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 425 transitions. [2023-08-24 11:16:46,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49189814814814814 [2023-08-24 11:16:46,524 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 425 transitions. [2023-08-24 11:16:46,524 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 425 transitions. [2023-08-24 11:16:46,525 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 11:16:46,525 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 425 transitions. [2023-08-24 11:16:46,526 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 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) [2023-08-24 11:16:46,527 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 288.0) internal successors, (1152), 4 states have internal predecessors, (1152), 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) [2023-08-24 11:16:46,527 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 288.0) internal successors, (1152), 4 states have internal predecessors, (1152), 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) [2023-08-24 11:16:46,527 INFO L175 Difference]: Start difference. First operand has 95 places, 315 transitions, 4499 flow. Second operand 3 states and 425 transitions. [2023-08-24 11:16:46,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 295 transitions, 4196 flow [2023-08-24 11:16:48,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 295 transitions, 3960 flow, removed 110 selfloop flow, removed 2 redundant places. [2023-08-24 11:16:48,194 INFO L231 Difference]: Finished difference. Result has 95 places, 219 transitions, 2828 flow [2023-08-24 11:16:48,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=2754, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2828, PETRI_PLACES=95, PETRI_TRANSITIONS=219} [2023-08-24 11:16:48,195 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 55 predicate places. [2023-08-24 11:16:48,195 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 219 transitions, 2828 flow [2023-08-24 11:16:48,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 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) [2023-08-24 11:16:48,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:16:48,196 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 11:16:48,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-24 11:16:48,196 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 11:16:48,196 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:16:48,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1341924707, now seen corresponding path program 1 times [2023-08-24 11:16:48,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:16:48,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830312109] [2023-08-24 11:16:48,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:16:48,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:16:48,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:16:48,260 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 11:16:48,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:16:48,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830312109] [2023-08-24 11:16:48,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830312109] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 11:16:48,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 11:16:48,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 11:16:48,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974196083] [2023-08-24 11:16:48,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 11:16:48,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 11:16:48,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:16:48,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 11:16:48,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 11:16:48,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 288 [2023-08-24 11:16:48,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 219 transitions, 2828 flow. Second operand has 5 states, 5 states have (on average 108.4) internal successors, (542), 5 states have internal predecessors, (542), 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) [2023-08-24 11:16:48,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:16:48,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 288 [2023-08-24 11:16:48,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:16:55,168 INFO L124 PetriNetUnfolderBase]: 46154/66723 cut-off events. [2023-08-24 11:16:55,168 INFO L125 PetriNetUnfolderBase]: For 334195/334195 co-relation queries the response was YES. [2023-08-24 11:16:55,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 257312 conditions, 66723 events. 46154/66723 cut-off events. For 334195/334195 co-relation queries the response was YES. Maximal size of possible extension queue 2804. Compared 497901 event pairs, 14877 based on Foata normal form. 718/58798 useless extension candidates. Maximal degree in co-relation 252281. Up to 27216 conditions per place. [2023-08-24 11:16:55,684 INFO L140 encePairwiseOnDemand]: 277/288 looper letters, 356 selfloop transitions, 166 changer transitions 1/526 dead transitions. [2023-08-24 11:16:55,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 526 transitions, 7323 flow [2023-08-24 11:16:55,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 11:16:55,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 11:16:55,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 878 transitions. [2023-08-24 11:16:55,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.435515873015873 [2023-08-24 11:16:55,687 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 878 transitions. [2023-08-24 11:16:55,687 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 878 transitions. [2023-08-24 11:16:55,688 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 11:16:55,688 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 878 transitions. [2023-08-24 11:16:55,690 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 125.42857142857143) internal successors, (878), 7 states have internal predecessors, (878), 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) [2023-08-24 11:16:55,692 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 288.0) internal successors, (2304), 8 states have internal predecessors, (2304), 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) [2023-08-24 11:16:55,693 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 288.0) internal successors, (2304), 8 states have internal predecessors, (2304), 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) [2023-08-24 11:16:55,693 INFO L175 Difference]: Start difference. First operand has 95 places, 219 transitions, 2828 flow. Second operand 7 states and 878 transitions. [2023-08-24 11:16:55,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 526 transitions, 7323 flow [2023-08-24 11:16:58,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 526 transitions, 7131 flow, removed 41 selfloop flow, removed 1 redundant places. [2023-08-24 11:16:58,009 INFO L231 Difference]: Finished difference. Result has 106 places, 320 transitions, 4785 flow [2023-08-24 11:16:58,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=2656, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4785, PETRI_PLACES=106, PETRI_TRANSITIONS=320} [2023-08-24 11:16:58,010 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 66 predicate places. [2023-08-24 11:16:58,010 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 320 transitions, 4785 flow [2023-08-24 11:16:58,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 108.4) internal successors, (542), 5 states have internal predecessors, (542), 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) [2023-08-24 11:16:58,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:16:58,011 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 11:16:58,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-24 11:16:58,011 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 11:16:58,011 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:16:58,011 INFO L85 PathProgramCache]: Analyzing trace with hash 218583753, now seen corresponding path program 1 times [2023-08-24 11:16:58,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:16:58,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204018018] [2023-08-24 11:16:58,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:16:58,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:16:58,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:16:58,055 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-24 11:16:58,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:16:58,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204018018] [2023-08-24 11:16:58,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204018018] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 11:16:58,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 11:16:58,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 11:16:58,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96948473] [2023-08-24 11:16:58,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 11:16:58,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 11:16:58,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:16:58,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 11:16:58,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 11:16:58,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 288 [2023-08-24 11:16:58,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 320 transitions, 4785 flow. Second operand has 5 states, 5 states have (on average 108.2) internal successors, (541), 5 states have internal predecessors, (541), 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) [2023-08-24 11:16:58,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:16:58,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 288 [2023-08-24 11:16:58,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:17:08,112 INFO L124 PetriNetUnfolderBase]: 59329/85862 cut-off events. [2023-08-24 11:17:08,112 INFO L125 PetriNetUnfolderBase]: For 524511/524511 co-relation queries the response was YES. [2023-08-24 11:17:08,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 354488 conditions, 85862 events. 59329/85862 cut-off events. For 524511/524511 co-relation queries the response was YES. Maximal size of possible extension queue 3946. Compared 662668 event pairs, 18630 based on Foata normal form. 684/76073 useless extension candidates. Maximal degree in co-relation 347249. Up to 34433 conditions per place. [2023-08-24 11:17:09,088 INFO L140 encePairwiseOnDemand]: 277/288 looper letters, 484 selfloop transitions, 160 changer transitions 0/647 dead transitions. [2023-08-24 11:17:09,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 647 transitions, 10215 flow [2023-08-24 11:17:09,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 11:17:09,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 11:17:09,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 876 transitions. [2023-08-24 11:17:09,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2023-08-24 11:17:09,091 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 876 transitions. [2023-08-24 11:17:09,091 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 876 transitions. [2023-08-24 11:17:09,092 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 11:17:09,092 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 876 transitions. [2023-08-24 11:17:09,094 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 125.14285714285714) internal successors, (876), 7 states have internal predecessors, (876), 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) [2023-08-24 11:17:09,097 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 288.0) internal successors, (2304), 8 states have internal predecessors, (2304), 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) [2023-08-24 11:17:09,098 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 288.0) internal successors, (2304), 8 states have internal predecessors, (2304), 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) [2023-08-24 11:17:09,098 INFO L175 Difference]: Start difference. First operand has 106 places, 320 transitions, 4785 flow. Second operand 7 states and 876 transitions. [2023-08-24 11:17:09,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 647 transitions, 10215 flow [2023-08-24 11:17:12,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 647 transitions, 10203 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-08-24 11:17:12,526 INFO L231 Difference]: Finished difference. Result has 118 places, 393 transitions, 6690 flow [2023-08-24 11:17:12,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=4773, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6690, PETRI_PLACES=118, PETRI_TRANSITIONS=393} [2023-08-24 11:17:12,527 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 78 predicate places. [2023-08-24 11:17:12,527 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 393 transitions, 6690 flow [2023-08-24 11:17:12,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 108.2) internal successors, (541), 5 states have internal predecessors, (541), 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) [2023-08-24 11:17:12,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:17:12,527 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 11:17:12,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-24 11:17:12,527 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 11:17:12,527 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:17:12,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1567051187, now seen corresponding path program 1 times [2023-08-24 11:17:12,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:17:12,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377112208] [2023-08-24 11:17:12,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:17:12,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:17:12,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:17:12,603 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-24 11:17:12,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:17:12,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377112208] [2023-08-24 11:17:12,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377112208] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 11:17:12,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 11:17:12,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 11:17:12,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648055004] [2023-08-24 11:17:12,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 11:17:12,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 11:17:12,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:17:12,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 11:17:12,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 11:17:12,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 288 [2023-08-24 11:17:12,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 393 transitions, 6690 flow. Second operand has 5 states, 5 states have (on average 108.2) internal successors, (541), 5 states have internal predecessors, (541), 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) [2023-08-24 11:17:12,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:17:12,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 288 [2023-08-24 11:17:12,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:17:28,580 INFO L124 PetriNetUnfolderBase]: 81352/117987 cut-off events. [2023-08-24 11:17:28,580 INFO L125 PetriNetUnfolderBase]: For 944019/944019 co-relation queries the response was YES. [2023-08-24 11:17:29,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 519158 conditions, 117987 events. 81352/117987 cut-off events. For 944019/944019 co-relation queries the response was YES. Maximal size of possible extension queue 5533. Compared 954042 event pairs, 26006 based on Foata normal form. 980/103701 useless extension candidates. Maximal degree in co-relation 509151. Up to 41321 conditions per place. [2023-08-24 11:17:29,621 INFO L140 encePairwiseOnDemand]: 277/288 looper letters, 604 selfloop transitions, 219 changer transitions 1/827 dead transitions. [2023-08-24 11:17:29,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 827 transitions, 14598 flow [2023-08-24 11:17:29,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 11:17:29,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 11:17:29,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 880 transitions. [2023-08-24 11:17:29,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2023-08-24 11:17:29,623 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 880 transitions. [2023-08-24 11:17:29,623 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 880 transitions. [2023-08-24 11:17:29,623 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 11:17:29,624 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 880 transitions. [2023-08-24 11:17:29,625 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 125.71428571428571) internal successors, (880), 7 states have internal predecessors, (880), 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) [2023-08-24 11:17:29,628 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 288.0) internal successors, (2304), 8 states have internal predecessors, (2304), 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) [2023-08-24 11:17:29,628 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 288.0) internal successors, (2304), 8 states have internal predecessors, (2304), 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) [2023-08-24 11:17:29,628 INFO L175 Difference]: Start difference. First operand has 118 places, 393 transitions, 6690 flow. Second operand 7 states and 880 transitions. [2023-08-24 11:17:29,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 827 transitions, 14598 flow [2023-08-24 11:17:37,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 827 transitions, 14428 flow, removed 85 selfloop flow, removed 0 redundant places. [2023-08-24 11:17:37,562 INFO L231 Difference]: Finished difference. Result has 130 places, 499 transitions, 9268 flow [2023-08-24 11:17:37,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=6369, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9268, PETRI_PLACES=130, PETRI_TRANSITIONS=499} [2023-08-24 11:17:37,563 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 90 predicate places. [2023-08-24 11:17:37,563 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 499 transitions, 9268 flow [2023-08-24 11:17:37,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 108.2) internal successors, (541), 5 states have internal predecessors, (541), 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) [2023-08-24 11:17:37,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:17:37,563 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 11:17:37,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-24 11:17:37,563 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 11:17:37,564 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:17:37,564 INFO L85 PathProgramCache]: Analyzing trace with hash 59114835, now seen corresponding path program 1 times [2023-08-24 11:17:37,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:17:37,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267898948] [2023-08-24 11:17:37,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:17:37,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:17:37,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:17:37,617 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-24 11:17:37,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:17:37,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267898948] [2023-08-24 11:17:37,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267898948] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 11:17:37,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 11:17:37,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 11:17:37,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350640037] [2023-08-24 11:17:37,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 11:17:37,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 11:17:37,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:17:37,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 11:17:37,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 11:17:37,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 288 [2023-08-24 11:17:37,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 499 transitions, 9268 flow. Second operand has 5 states, 5 states have (on average 108.2) internal successors, (541), 5 states have internal predecessors, (541), 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) [2023-08-24 11:17:37,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:17:37,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 288 [2023-08-24 11:17:37,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:18:01,618 INFO L124 PetriNetUnfolderBase]: 101988/147915 cut-off events. [2023-08-24 11:18:01,618 INFO L125 PetriNetUnfolderBase]: For 1443149/1443149 co-relation queries the response was YES. [2023-08-24 11:18:02,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 689592 conditions, 147915 events. 101988/147915 cut-off events. For 1443149/1443149 co-relation queries the response was YES. Maximal size of possible extension queue 7153. Compared 1230325 event pairs, 29955 based on Foata normal form. 982/129046 useless extension candidates. Maximal degree in co-relation 676103. Up to 62205 conditions per place. [2023-08-24 11:18:03,308 INFO L140 encePairwiseOnDemand]: 277/288 looper letters, 712 selfloop transitions, 255 changer transitions 1/971 dead transitions. [2023-08-24 11:18:03,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 971 transitions, 18756 flow [2023-08-24 11:18:03,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 11:18:03,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 11:18:03,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 879 transitions. [2023-08-24 11:18:03,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43601190476190477 [2023-08-24 11:18:03,310 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 879 transitions. [2023-08-24 11:18:03,310 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 879 transitions. [2023-08-24 11:18:03,310 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 11:18:03,310 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 879 transitions. [2023-08-24 11:18:03,311 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 125.57142857142857) internal successors, (879), 7 states have internal predecessors, (879), 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) [2023-08-24 11:18:03,314 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 288.0) internal successors, (2304), 8 states have internal predecessors, (2304), 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) [2023-08-24 11:18:03,314 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 288.0) internal successors, (2304), 8 states have internal predecessors, (2304), 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) [2023-08-24 11:18:03,314 INFO L175 Difference]: Start difference. First operand has 130 places, 499 transitions, 9268 flow. Second operand 7 states and 879 transitions. [2023-08-24 11:18:03,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 971 transitions, 18756 flow [2023-08-24 11:18:15,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 971 transitions, 18644 flow, removed 56 selfloop flow, removed 0 redundant places. [2023-08-24 11:18:15,182 INFO L231 Difference]: Finished difference. Result has 142 places, 607 transitions, 12569 flow [2023-08-24 11:18:15,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=9118, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12569, PETRI_PLACES=142, PETRI_TRANSITIONS=607} [2023-08-24 11:18:15,183 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 102 predicate places. [2023-08-24 11:18:15,183 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 607 transitions, 12569 flow [2023-08-24 11:18:15,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 108.2) internal successors, (541), 5 states have internal predecessors, (541), 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) [2023-08-24 11:18:15,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:18:15,183 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 11:18:15,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-24 11:18:15,183 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 11:18:15,184 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:18:15,184 INFO L85 PathProgramCache]: Analyzing trace with hash 285113267, now seen corresponding path program 1 times [2023-08-24 11:18:15,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:18:15,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795773633] [2023-08-24 11:18:15,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:18:15,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:18:15,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:18:15,259 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 11:18:15,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:18:15,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795773633] [2023-08-24 11:18:15,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795773633] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 11:18:15,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 11:18:15,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-24 11:18:15,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821128697] [2023-08-24 11:18:15,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 11:18:15,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 11:18:15,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:18:15,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 11:18:15,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-24 11:18:15,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 288 [2023-08-24 11:18:15,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 607 transitions, 12569 flow. Second operand has 7 states, 7 states have (on average 105.14285714285714) internal successors, (736), 7 states have internal predecessors, (736), 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) [2023-08-24 11:18:15,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:18:15,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 288 [2023-08-24 11:18:15,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:18:50,464 INFO L124 PetriNetUnfolderBase]: 129779/186535 cut-off events. [2023-08-24 11:18:50,464 INFO L125 PetriNetUnfolderBase]: For 2216687/2216687 co-relation queries the response was YES. [2023-08-24 11:18:51,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 924706 conditions, 186535 events. 129779/186535 cut-off events. For 2216687/2216687 co-relation queries the response was YES. Maximal size of possible extension queue 7576. Compared 1555502 event pairs, 36212 based on Foata normal form. 1096/163402 useless extension candidates. Maximal degree in co-relation 895435. Up to 67429 conditions per place. [2023-08-24 11:18:52,421 INFO L140 encePairwiseOnDemand]: 274/288 looper letters, 674 selfloop transitions, 500 changer transitions 12/1189 dead transitions. [2023-08-24 11:18:52,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 1189 transitions, 23966 flow [2023-08-24 11:18:52,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-24 11:18:52,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-24 11:18:52,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1563 transitions. [2023-08-24 11:18:52,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41746794871794873 [2023-08-24 11:18:52,424 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1563 transitions. [2023-08-24 11:18:52,424 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1563 transitions. [2023-08-24 11:18:52,424 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 11:18:52,425 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1563 transitions. [2023-08-24 11:18:52,427 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 120.23076923076923) internal successors, (1563), 13 states have internal predecessors, (1563), 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) [2023-08-24 11:18:52,431 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 288.0) internal successors, (4032), 14 states have internal predecessors, (4032), 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) [2023-08-24 11:18:52,432 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 288.0) internal successors, (4032), 14 states have internal predecessors, (4032), 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) [2023-08-24 11:18:52,432 INFO L175 Difference]: Start difference. First operand has 142 places, 607 transitions, 12569 flow. Second operand 13 states and 1563 transitions. [2023-08-24 11:18:52,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 1189 transitions, 23966 flow [2023-08-24 11:19:14,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 1189 transitions, 23633 flow, removed 145 selfloop flow, removed 1 redundant places. [2023-08-24 11:19:14,875 INFO L231 Difference]: Finished difference. Result has 164 places, 861 transitions, 19287 flow [2023-08-24 11:19:14,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=12194, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=600, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=274, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=19287, PETRI_PLACES=164, PETRI_TRANSITIONS=861} [2023-08-24 11:19:14,876 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 124 predicate places. [2023-08-24 11:19:14,876 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 861 transitions, 19287 flow [2023-08-24 11:19:14,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 105.14285714285714) internal successors, (736), 7 states have internal predecessors, (736), 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) [2023-08-24 11:19:14,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:19:14,877 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 11:19:14,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-24 11:19:14,877 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 11:19:14,877 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:19:14,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1658596953, now seen corresponding path program 1 times [2023-08-24 11:19:14,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:19:14,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82193823] [2023-08-24 11:19:14,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:19:14,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:19:14,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:19:14,951 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-24 11:19:14,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:19:14,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82193823] [2023-08-24 11:19:14,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82193823] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 11:19:14,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 11:19:14,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-24 11:19:14,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764133672] [2023-08-24 11:19:14,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 11:19:14,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 11:19:14,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:19:14,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 11:19:14,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-24 11:19:14,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 288 [2023-08-24 11:19:14,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 861 transitions, 19287 flow. Second operand has 7 states, 7 states have (on average 105.14285714285714) internal successors, (736), 7 states have internal predecessors, (736), 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) [2023-08-24 11:19:14,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:19:14,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 288 [2023-08-24 11:19:14,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand