/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 INSUFFICIENT_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-divine/ring_2w1r-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 06:14:45,161 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 06:14:45,245 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 06:14:45,255 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 06:14:45,256 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 06:14:45,287 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 06:14:45,288 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 06:14:45,288 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 06:14:45,289 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 06:14:45,292 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 06:14:45,292 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 06:14:45,293 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 06:14:45,293 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 06:14:45,294 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 06:14:45,294 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 06:14:45,294 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 06:14:45,294 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 06:14:45,295 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 06:14:45,295 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 06:14:45,295 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 06:14:45,295 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 06:14:45,296 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 06:14:45,296 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 06:14:45,297 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 06:14:45,297 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 06:14:45,297 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 06:14:45,297 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 06:14:45,297 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 06:14:45,298 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 06:14:45,298 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 06:14:45,299 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 06:14:45,299 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 06:14:45,299 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 06:14:45,299 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 06:14:45,299 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 06:14:45,300 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-24 06:14:45,589 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 06:14:45,614 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 06:14:45,616 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 06:14:45,617 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 06:14:45,617 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 06:14:45,618 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-divine/ring_2w1r-1.i [2023-08-24 06:14:46,850 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 06:14:47,159 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 06:14:47,160 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-divine/ring_2w1r-1.i [2023-08-24 06:14:47,174 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc7b330c6/c4dd2b59a5b545de97eac796e09d25cb/FLAG350c3f0f2 [2023-08-24 06:14:47,188 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc7b330c6/c4dd2b59a5b545de97eac796e09d25cb [2023-08-24 06:14:47,192 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 06:14:47,193 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 06:14:47,195 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 06:14:47,196 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 06:14:47,198 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 06:14:47,199 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 06:14:47" (1/1) ... [2023-08-24 06:14:47,200 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d4c9c16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:14:47, skipping insertion in model container [2023-08-24 06:14:47,200 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 06:14:47" (1/1) ... [2023-08-24 06:14:47,258 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 06:14:47,409 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-24 06:14:47,628 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-divine/ring_2w1r-1.i[39095,39108] [2023-08-24 06:14:47,629 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-divine/ring_2w1r-1.i[39180,39193] [2023-08-24 06:14:47,630 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-divine/ring_2w1r-1.i[39232,39245] [2023-08-24 06:14:47,672 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-divine/ring_2w1r-1.i[49388,49401] [2023-08-24 06:14:47,673 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-divine/ring_2w1r-1.i[49437,49450] [2023-08-24 06:14:47,675 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-divine/ring_2w1r-1.i[49565,49578] [2023-08-24 06:14:47,675 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-divine/ring_2w1r-1.i[49623,49636] [2023-08-24 06:14:47,682 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 06:14:47,691 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 06:14:47,705 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-24 06:14:47,711 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [250] [2023-08-24 06:14:47,712 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [250] [2023-08-24 06:14:47,729 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: volatile long [805] [2023-08-24 06:14:47,730 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: long [806] [2023-08-24 06:14:47,730 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: volatile long [807] [2023-08-24 06:14:47,730 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: long [809] [2023-08-24 06:14:47,732 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: long [814] [2023-08-24 06:14:47,732 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: long [815] [2023-08-24 06:14:47,734 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: long [827] [2023-08-24 06:14:47,735 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-divine/ring_2w1r-1.i[39095,39108] [2023-08-24 06:14:47,736 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-divine/ring_2w1r-1.i[39180,39193] [2023-08-24 06:14:47,737 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-divine/ring_2w1r-1.i[39232,39245] [2023-08-24 06:14:47,738 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: long [843] [2023-08-24 06:14:47,740 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned short [899] [2023-08-24 06:14:47,744 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: long [1054] [2023-08-24 06:14:47,747 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-divine/ring_2w1r-1.i[49388,49401] [2023-08-24 06:14:47,748 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-divine/ring_2w1r-1.i[49437,49450] [2023-08-24 06:14:47,749 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-divine/ring_2w1r-1.i[49565,49578] [2023-08-24 06:14:47,749 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-divine/ring_2w1r-1.i[49623,49636] [2023-08-24 06:14:47,752 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: long [1078] [2023-08-24 06:14:47,753 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 06:14:47,816 WARN L669 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 06:14:47,822 INFO L206 MainTranslator]: Completed translation [2023-08-24 06:14:47,823 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:14:47 WrapperNode [2023-08-24 06:14:47,823 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 06:14:47,824 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 06:14:47,824 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 06:14:47,824 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 06:14:47,830 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:14:47" (1/1) ... [2023-08-24 06:14:47,855 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:14:47" (1/1) ... [2023-08-24 06:14:47,882 INFO L138 Inliner]: procedures = 310, calls = 70, calls flagged for inlining = 10, calls inlined = 8, statements flattened = 206 [2023-08-24 06:14:47,882 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 06:14:47,883 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 06:14:47,883 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 06:14:47,883 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 06:14:47,890 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:14:47" (1/1) ... [2023-08-24 06:14:47,891 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:14:47" (1/1) ... [2023-08-24 06:14:47,895 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:14:47" (1/1) ... [2023-08-24 06:14:47,895 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:14:47" (1/1) ... [2023-08-24 06:14:47,904 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:14:47" (1/1) ... [2023-08-24 06:14:47,907 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:14:47" (1/1) ... [2023-08-24 06:14:47,909 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:14:47" (1/1) ... [2023-08-24 06:14:47,910 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:14:47" (1/1) ... [2023-08-24 06:14:47,913 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 06:14:47,914 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 06:14:47,914 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 06:14:47,914 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 06:14:47,915 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:14:47" (1/1) ... [2023-08-24 06:14:47,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 06:14:47,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 06:14:47,943 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 06:14:47,945 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 06:14:47,967 INFO L130 BoogieDeclarations]: Found specification of procedure reader_two [2023-08-24 06:14:47,968 INFO L138 BoogieDeclarations]: Found implementation of procedure reader_two [2023-08-24 06:14:47,968 INFO L130 BoogieDeclarations]: Found specification of procedure writer_fn [2023-08-24 06:14:47,968 INFO L138 BoogieDeclarations]: Found implementation of procedure writer_fn [2023-08-24 06:14:47,968 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 06:14:47,968 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 06:14:47,968 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 06:14:47,968 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 06:14:47,969 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-24 06:14:47,969 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 06:14:47,969 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 06:14:47,969 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 06:14:47,969 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 06:14:47,970 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 06:14:48,105 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 06:14:48,106 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 06:14:48,459 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 06:14:48,470 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 06:14:48,470 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-24 06:14:48,472 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 06:14:48 BoogieIcfgContainer [2023-08-24 06:14:48,473 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 06:14:48,475 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 06:14:48,475 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 06:14:48,478 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 06:14:48,478 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 06:14:47" (1/3) ... [2023-08-24 06:14:48,479 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6734bd00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 06:14:48, skipping insertion in model container [2023-08-24 06:14:48,479 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:14:47" (2/3) ... [2023-08-24 06:14:48,479 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6734bd00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 06:14:48, skipping insertion in model container [2023-08-24 06:14:48,479 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 06:14:48" (3/3) ... [2023-08-24 06:14:48,480 INFO L112 eAbstractionObserver]: Analyzing ICFG ring_2w1r-1.i [2023-08-24 06:14:48,495 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 06:14:48,495 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2023-08-24 06:14:48,495 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 06:14:48,593 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-24 06:14:48,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 210 places, 220 transitions, 456 flow [2023-08-24 06:14:48,710 INFO L124 PetriNetUnfolderBase]: 17/218 cut-off events. [2023-08-24 06:14:48,710 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 06:14:48,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 227 conditions, 218 events. 17/218 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 468 event pairs, 0 based on Foata normal form. 0/197 useless extension candidates. Maximal degree in co-relation 172. Up to 2 conditions per place. [2023-08-24 06:14:48,721 INFO L82 GeneralOperation]: Start removeDead. Operand has 210 places, 220 transitions, 456 flow [2023-08-24 06:14:48,727 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 198 places, 208 transitions, 425 flow [2023-08-24 06:14:48,730 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 06:14:48,737 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 198 places, 208 transitions, 425 flow [2023-08-24 06:14:48,739 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 198 places, 208 transitions, 425 flow [2023-08-24 06:14:48,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 198 places, 208 transitions, 425 flow [2023-08-24 06:14:48,793 INFO L124 PetriNetUnfolderBase]: 17/208 cut-off events. [2023-08-24 06:14:48,793 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-24 06:14:48,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 216 conditions, 208 events. 17/208 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 421 event pairs, 0 based on Foata normal form. 0/187 useless extension candidates. Maximal degree in co-relation 172. Up to 2 conditions per place. [2023-08-24 06:14:48,803 INFO L119 LiptonReduction]: Number of co-enabled transitions 17492 [2023-08-24 06:14:53,882 INFO L134 LiptonReduction]: Checked pairs total: 30229 [2023-08-24 06:14:53,882 INFO L136 LiptonReduction]: Total number of compositions: 184 [2023-08-24 06:14:53,894 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 06:14:53,899 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;@3106ca5d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 06:14:53,899 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2023-08-24 06:14:53,907 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 06:14:53,907 INFO L124 PetriNetUnfolderBase]: 8/48 cut-off events. [2023-08-24 06:14:53,908 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-24 06:14:53,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:14:53,908 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 06:14:53,909 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION === [reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-08-24 06:14:53,912 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:14:53,913 INFO L85 PathProgramCache]: Analyzing trace with hash 783077020, now seen corresponding path program 1 times [2023-08-24 06:14:53,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:14:53,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082608010] [2023-08-24 06:14:53,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:14:53,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:14:54,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 06:14:54,931 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 06:14:54,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 06:14:54,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082608010] [2023-08-24 06:14:54,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082608010] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 06:14:54,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 06:14:54,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 06:14:54,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392314301] [2023-08-24 06:14:54,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 06:14:54,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-24 06:14:54,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 06:14:54,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-24 06:14:54,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-08-24 06:14:54,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 404 [2023-08-24 06:14:54,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 59 transitions, 127 flow. Second operand has 6 states, 6 states have (on average 144.66666666666666) internal successors, (868), 6 states have internal predecessors, (868), 0 states have call successors, (0), 0 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 06:14:54,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 06:14:54,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 404 [2023-08-24 06:14:54,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 06:14:55,912 INFO L124 PetriNetUnfolderBase]: 5862/8420 cut-off events. [2023-08-24 06:14:55,912 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2023-08-24 06:14:55,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16905 conditions, 8420 events. 5862/8420 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 38166 event pairs, 3643 based on Foata normal form. 203/6709 useless extension candidates. Maximal degree in co-relation 16801. Up to 8407 conditions per place. [2023-08-24 06:14:55,960 INFO L140 encePairwiseOnDemand]: 393/404 looper letters, 54 selfloop transitions, 8 changer transitions 5/68 dead transitions. [2023-08-24 06:14:55,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 68 transitions, 279 flow [2023-08-24 06:14:55,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 06:14:55,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 06:14:55,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 925 transitions. [2023-08-24 06:14:55,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3816006600660066 [2023-08-24 06:14:55,979 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 925 transitions. [2023-08-24 06:14:55,979 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 925 transitions. [2023-08-24 06:14:55,982 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 06:14:55,984 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 925 transitions. [2023-08-24 06:14:55,989 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 154.16666666666666) internal successors, (925), 6 states have internal predecessors, (925), 0 states have call successors, (0), 0 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 06:14:55,996 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 404.0) internal successors, (2828), 7 states have internal predecessors, (2828), 0 states have call successors, (0), 0 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 06:14:55,997 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 404.0) internal successors, (2828), 7 states have internal predecessors, (2828), 0 states have call successors, (0), 0 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 06:14:55,999 INFO L175 Difference]: Start difference. First operand has 55 places, 59 transitions, 127 flow. Second operand 6 states and 925 transitions. [2023-08-24 06:14:56,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 68 transitions, 279 flow [2023-08-24 06:14:56,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 68 transitions, 274 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-24 06:14:56,005 INFO L231 Difference]: Finished difference. Result has 60 places, 56 transitions, 149 flow [2023-08-24 06:14:56,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=149, PETRI_PLACES=60, PETRI_TRANSITIONS=56} [2023-08-24 06:14:56,009 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 5 predicate places. [2023-08-24 06:14:56,009 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 56 transitions, 149 flow [2023-08-24 06:14:56,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 144.66666666666666) internal successors, (868), 6 states have internal predecessors, (868), 0 states have call successors, (0), 0 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 06:14:56,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:14:56,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 06:14:56,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 06:14:56,011 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION === [reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-08-24 06:14:56,011 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:14:56,011 INFO L85 PathProgramCache]: Analyzing trace with hash 580708536, now seen corresponding path program 1 times [2023-08-24 06:14:56,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:14:56,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760305371] [2023-08-24 06:14:56,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:14:56,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:14:56,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 06:14:56,658 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 06:14:56,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 06:14:56,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760305371] [2023-08-24 06:14:56,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760305371] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 06:14:56,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 06:14:56,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-24 06:14:56,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734029834] [2023-08-24 06:14:56,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 06:14:56,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 06:14:56,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 06:14:56,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 06:14:56,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-08-24 06:14:56,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 404 [2023-08-24 06:14:56,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 56 transitions, 149 flow. Second operand has 7 states, 7 states have (on average 141.42857142857142) internal successors, (990), 7 states have internal predecessors, (990), 0 states have call successors, (0), 0 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 06:14:56,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 06:14:56,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 404 [2023-08-24 06:14:56,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 06:14:57,722 INFO L124 PetriNetUnfolderBase]: 7114/10233 cut-off events. [2023-08-24 06:14:57,724 INFO L125 PetriNetUnfolderBase]: For 358/358 co-relation queries the response was YES. [2023-08-24 06:14:57,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21257 conditions, 10233 events. 7114/10233 cut-off events. For 358/358 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 48187 event pairs, 1356 based on Foata normal form. 0/8136 useless extension candidates. Maximal degree in co-relation 16521. Up to 7924 conditions per place. [2023-08-24 06:14:57,783 INFO L140 encePairwiseOnDemand]: 392/404 looper letters, 106 selfloop transitions, 18 changer transitions 0/125 dead transitions. [2023-08-24 06:14:57,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 125 transitions, 551 flow [2023-08-24 06:14:57,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 06:14:57,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 06:14:57,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 956 transitions. [2023-08-24 06:14:57,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3943894389438944 [2023-08-24 06:14:57,787 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 956 transitions. [2023-08-24 06:14:57,787 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 956 transitions. [2023-08-24 06:14:57,788 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 06:14:57,788 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 956 transitions. [2023-08-24 06:14:57,790 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 159.33333333333334) internal successors, (956), 6 states have internal predecessors, (956), 0 states have call successors, (0), 0 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 06:14:57,794 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 404.0) internal successors, (2828), 7 states have internal predecessors, (2828), 0 states have call successors, (0), 0 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 06:14:57,795 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 404.0) internal successors, (2828), 7 states have internal predecessors, (2828), 0 states have call successors, (0), 0 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 06:14:57,795 INFO L175 Difference]: Start difference. First operand has 60 places, 56 transitions, 149 flow. Second operand 6 states and 956 transitions. [2023-08-24 06:14:57,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 125 transitions, 551 flow [2023-08-24 06:14:57,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 125 transitions, 541 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-24 06:14:57,813 INFO L231 Difference]: Finished difference. Result has 61 places, 68 transitions, 247 flow [2023-08-24 06:14:57,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=247, PETRI_PLACES=61, PETRI_TRANSITIONS=68} [2023-08-24 06:14:57,814 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 6 predicate places. [2023-08-24 06:14:57,814 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 68 transitions, 247 flow [2023-08-24 06:14:57,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 141.42857142857142) internal successors, (990), 7 states have internal predecessors, (990), 0 states have call successors, (0), 0 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 06:14:57,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:14:57,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 06:14:57,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-24 06:14:57,816 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION === [reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-08-24 06:14:57,817 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:14:57,817 INFO L85 PathProgramCache]: Analyzing trace with hash -962420307, now seen corresponding path program 1 times [2023-08-24 06:14:57,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:14:57,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973658463] [2023-08-24 06:14:57,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:14:57,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:14:57,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 06:14:58,450 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 06:14:58,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 06:14:58,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973658463] [2023-08-24 06:14:58,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973658463] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 06:14:58,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 06:14:58,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-24 06:14:58,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244056694] [2023-08-24 06:14:58,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 06:14:58,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 06:14:58,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 06:14:58,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 06:14:58,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-24 06:14:58,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 404 [2023-08-24 06:14:58,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 68 transitions, 247 flow. Second operand has 7 states, 7 states have (on average 141.42857142857142) internal successors, (990), 7 states have internal predecessors, (990), 0 states have call successors, (0), 0 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 06:14:58,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 06:14:58,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 404 [2023-08-24 06:14:58,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 06:14:59,440 INFO L124 PetriNetUnfolderBase]: 6466/9355 cut-off events. [2023-08-24 06:14:59,440 INFO L125 PetriNetUnfolderBase]: For 2017/2047 co-relation queries the response was YES. [2023-08-24 06:14:59,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21322 conditions, 9355 events. 6466/9355 cut-off events. For 2017/2047 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 42608 event pairs, 1400 based on Foata normal form. 26/7558 useless extension candidates. Maximal degree in co-relation 20715. Up to 7644 conditions per place. [2023-08-24 06:14:59,486 INFO L140 encePairwiseOnDemand]: 396/404 looper letters, 101 selfloop transitions, 17 changer transitions 0/119 dead transitions. [2023-08-24 06:14:59,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 119 transitions, 590 flow [2023-08-24 06:14:59,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 06:14:59,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 06:14:59,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 947 transitions. [2023-08-24 06:14:59,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39067656765676567 [2023-08-24 06:14:59,490 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 947 transitions. [2023-08-24 06:14:59,490 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 947 transitions. [2023-08-24 06:14:59,490 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 06:14:59,490 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 947 transitions. [2023-08-24 06:14:59,493 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 157.83333333333334) internal successors, (947), 6 states have internal predecessors, (947), 0 states have call successors, (0), 0 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 06:14:59,496 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 404.0) internal successors, (2828), 7 states have internal predecessors, (2828), 0 states have call successors, (0), 0 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 06:14:59,499 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 404.0) internal successors, (2828), 7 states have internal predecessors, (2828), 0 states have call successors, (0), 0 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 06:14:59,499 INFO L175 Difference]: Start difference. First operand has 61 places, 68 transitions, 247 flow. Second operand 6 states and 947 transitions. [2023-08-24 06:14:59,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 119 transitions, 590 flow [2023-08-24 06:14:59,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 119 transitions, 572 flow, removed 8 selfloop flow, removed 1 redundant places. [2023-08-24 06:14:59,529 INFO L231 Difference]: Finished difference. Result has 66 places, 68 transitions, 277 flow [2023-08-24 06:14:59,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=277, PETRI_PLACES=66, PETRI_TRANSITIONS=68} [2023-08-24 06:14:59,530 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 11 predicate places. [2023-08-24 06:14:59,530 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 68 transitions, 277 flow [2023-08-24 06:14:59,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 141.42857142857142) internal successors, (990), 7 states have internal predecessors, (990), 0 states have call successors, (0), 0 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 06:14:59,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:14:59,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 06:14:59,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-24 06:14:59,532 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION === [reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-08-24 06:14:59,532 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:14:59,532 INFO L85 PathProgramCache]: Analyzing trace with hash 175845992, now seen corresponding path program 1 times [2023-08-24 06:14:59,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:14:59,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447971962] [2023-08-24 06:14:59,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:14:59,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:14:59,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 06:15:00,587 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 06:15:00,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 06:15:00,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447971962] [2023-08-24 06:15:00,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447971962] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 06:15:00,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 06:15:00,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-08-24 06:15:00,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761059448] [2023-08-24 06:15:00,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 06:15:00,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-24 06:15:00,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 06:15:00,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-24 06:15:00,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2023-08-24 06:15:00,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 404 [2023-08-24 06:15:00,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 68 transitions, 277 flow. Second operand has 13 states, 13 states have (on average 130.84615384615384) internal successors, (1701), 13 states have internal predecessors, (1701), 0 states have call successors, (0), 0 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 06:15:00,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 06:15:00,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 404 [2023-08-24 06:15:00,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 06:15:03,227 INFO L124 PetriNetUnfolderBase]: 8466/12275 cut-off events. [2023-08-24 06:15:03,227 INFO L125 PetriNetUnfolderBase]: For 5448/5450 co-relation queries the response was YES. [2023-08-24 06:15:03,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28844 conditions, 12275 events. 8466/12275 cut-off events. For 5448/5450 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 60922 event pairs, 760 based on Foata normal form. 2/10143 useless extension candidates. Maximal degree in co-relation 25556. Up to 7919 conditions per place. [2023-08-24 06:15:03,295 INFO L140 encePairwiseOnDemand]: 385/404 looper letters, 273 selfloop transitions, 91 changer transitions 0/365 dead transitions. [2023-08-24 06:15:03,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 365 transitions, 2035 flow [2023-08-24 06:15:03,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-24 06:15:03,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-24 06:15:03,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2914 transitions. [2023-08-24 06:15:03,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36064356435643563 [2023-08-24 06:15:03,304 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2914 transitions. [2023-08-24 06:15:03,304 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2914 transitions. [2023-08-24 06:15:03,305 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 06:15:03,305 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2914 transitions. [2023-08-24 06:15:03,311 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 145.7) internal successors, (2914), 20 states have internal predecessors, (2914), 0 states have call successors, (0), 0 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 06:15:03,323 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 404.0) internal successors, (8484), 21 states have internal predecessors, (8484), 0 states have call successors, (0), 0 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 06:15:03,325 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 404.0) internal successors, (8484), 21 states have internal predecessors, (8484), 0 states have call successors, (0), 0 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 06:15:03,325 INFO L175 Difference]: Start difference. First operand has 66 places, 68 transitions, 277 flow. Second operand 20 states and 2914 transitions. [2023-08-24 06:15:03,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 365 transitions, 2035 flow [2023-08-24 06:15:03,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 365 transitions, 1969 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-08-24 06:15:03,346 INFO L231 Difference]: Finished difference. Result has 88 places, 151 transitions, 1084 flow [2023-08-24 06:15:03,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=257, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1084, PETRI_PLACES=88, PETRI_TRANSITIONS=151} [2023-08-24 06:15:03,349 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 33 predicate places. [2023-08-24 06:15:03,349 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 151 transitions, 1084 flow [2023-08-24 06:15:03,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 130.84615384615384) internal successors, (1701), 13 states have internal predecessors, (1701), 0 states have call successors, (0), 0 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 06:15:03,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:15:03,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 06:15:03,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-24 06:15:03,355 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION === [reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-08-24 06:15:03,355 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:15:03,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1114646708, now seen corresponding path program 2 times [2023-08-24 06:15:03,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:15:03,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748835411] [2023-08-24 06:15:03,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:15:03,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:15:03,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 06:15:04,290 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 06:15:04,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 06:15:04,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748835411] [2023-08-24 06:15:04,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748835411] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 06:15:04,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 06:15:04,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-08-24 06:15:04,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821169362] [2023-08-24 06:15:04,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 06:15:04,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-24 06:15:04,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 06:15:04,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-24 06:15:04,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2023-08-24 06:15:04,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 404 [2023-08-24 06:15:04,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 151 transitions, 1084 flow. Second operand has 12 states, 12 states have (on average 131.0) internal successors, (1572), 12 states have internal predecessors, (1572), 0 states have call successors, (0), 0 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 06:15:04,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 06:15:04,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 404 [2023-08-24 06:15:04,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 06:15:06,319 INFO L124 PetriNetUnfolderBase]: 9590/13973 cut-off events. [2023-08-24 06:15:06,319 INFO L125 PetriNetUnfolderBase]: For 11310/11384 co-relation queries the response was YES. [2023-08-24 06:15:06,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39128 conditions, 13973 events. 9590/13973 cut-off events. For 11310/11384 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 70854 event pairs, 1532 based on Foata normal form. 74/12377 useless extension candidates. Maximal degree in co-relation 37513. Up to 8589 conditions per place. [2023-08-24 06:15:06,404 INFO L140 encePairwiseOnDemand]: 386/404 looper letters, 202 selfloop transitions, 126 changer transitions 0/329 dead transitions. [2023-08-24 06:15:06,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 329 transitions, 2407 flow [2023-08-24 06:15:06,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-24 06:15:06,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-24 06:15:06,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2044 transitions. [2023-08-24 06:15:06,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3613861386138614 [2023-08-24 06:15:06,409 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2044 transitions. [2023-08-24 06:15:06,409 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2044 transitions. [2023-08-24 06:15:06,410 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 06:15:06,410 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2044 transitions. [2023-08-24 06:15:06,414 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 146.0) internal successors, (2044), 14 states have internal predecessors, (2044), 0 states have call successors, (0), 0 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 06:15:06,420 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 404.0) internal successors, (6060), 15 states have internal predecessors, (6060), 0 states have call successors, (0), 0 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 06:15:06,421 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 404.0) internal successors, (6060), 15 states have internal predecessors, (6060), 0 states have call successors, (0), 0 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 06:15:06,421 INFO L175 Difference]: Start difference. First operand has 88 places, 151 transitions, 1084 flow. Second operand 14 states and 2044 transitions. [2023-08-24 06:15:06,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 329 transitions, 2407 flow [2023-08-24 06:15:06,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 329 transitions, 2341 flow, removed 32 selfloop flow, removed 1 redundant places. [2023-08-24 06:15:06,620 INFO L231 Difference]: Finished difference. Result has 106 places, 199 transitions, 1788 flow [2023-08-24 06:15:06,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=1034, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1788, PETRI_PLACES=106, PETRI_TRANSITIONS=199} [2023-08-24 06:15:06,622 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 51 predicate places. [2023-08-24 06:15:06,622 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 199 transitions, 1788 flow [2023-08-24 06:15:06,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 131.0) internal successors, (1572), 12 states have internal predecessors, (1572), 0 states have call successors, (0), 0 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 06:15:06,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:15:06,623 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 06:15:06,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-24 06:15:06,624 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION === [reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-08-24 06:15:06,624 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:15:06,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1893333899, now seen corresponding path program 1 times [2023-08-24 06:15:06,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:15:06,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283267049] [2023-08-24 06:15:06,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:15:06,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:15:06,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 06:15:07,433 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 06:15:07,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 06:15:07,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283267049] [2023-08-24 06:15:07,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283267049] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 06:15:07,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 06:15:07,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-08-24 06:15:07,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500506087] [2023-08-24 06:15:07,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 06:15:07,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-24 06:15:07,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 06:15:07,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-24 06:15:07,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2023-08-24 06:15:07,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 404 [2023-08-24 06:15:07,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 199 transitions, 1788 flow. Second operand has 13 states, 13 states have (on average 130.84615384615384) internal successors, (1701), 13 states have internal predecessors, (1701), 0 states have call successors, (0), 0 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 06:15:07,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 06:15:07,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 404 [2023-08-24 06:15:07,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 06:15:10,710 INFO L124 PetriNetUnfolderBase]: 10348/15221 cut-off events. [2023-08-24 06:15:10,710 INFO L125 PetriNetUnfolderBase]: For 24990/25010 co-relation queries the response was YES. [2023-08-24 06:15:10,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47015 conditions, 15221 events. 10348/15221 cut-off events. For 24990/25010 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 80166 event pairs, 1592 based on Foata normal form. 20/13749 useless extension candidates. Maximal degree in co-relation 46370. Up to 9677 conditions per place. [2023-08-24 06:15:10,794 INFO L140 encePairwiseOnDemand]: 385/404 looper letters, 453 selfloop transitions, 298 changer transitions 0/752 dead transitions. [2023-08-24 06:15:10,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 752 transitions, 8105 flow [2023-08-24 06:15:10,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-24 06:15:10,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-24 06:15:10,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3306 transitions. [2023-08-24 06:15:10,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3557899268187688 [2023-08-24 06:15:10,804 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3306 transitions. [2023-08-24 06:15:10,804 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3306 transitions. [2023-08-24 06:15:10,806 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 06:15:10,806 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3306 transitions. [2023-08-24 06:15:10,811 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 143.7391304347826) internal successors, (3306), 23 states have internal predecessors, (3306), 0 states have call successors, (0), 0 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 06:15:10,823 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 404.0) internal successors, (9696), 24 states have internal predecessors, (9696), 0 states have call successors, (0), 0 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 06:15:10,825 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 404.0) internal successors, (9696), 24 states have internal predecessors, (9696), 0 states have call successors, (0), 0 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 06:15:10,826 INFO L175 Difference]: Start difference. First operand has 106 places, 199 transitions, 1788 flow. Second operand 23 states and 3306 transitions. [2023-08-24 06:15:10,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 752 transitions, 8105 flow [2023-08-24 06:15:11,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 752 transitions, 8065 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-24 06:15:11,080 INFO L231 Difference]: Finished difference. Result has 132 places, 414 transitions, 5185 flow [2023-08-24 06:15:11,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=1773, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=5185, PETRI_PLACES=132, PETRI_TRANSITIONS=414} [2023-08-24 06:15:11,083 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 77 predicate places. [2023-08-24 06:15:11,083 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 414 transitions, 5185 flow [2023-08-24 06:15:11,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 130.84615384615384) internal successors, (1701), 13 states have internal predecessors, (1701), 0 states have call successors, (0), 0 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 06:15:11,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:15:11,084 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 06:15:11,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-24 06:15:11,084 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION === [reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-08-24 06:15:11,085 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:15:11,085 INFO L85 PathProgramCache]: Analyzing trace with hash 527367123, now seen corresponding path program 2 times [2023-08-24 06:15:11,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:15:11,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641888647] [2023-08-24 06:15:11,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:15:11,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:15:11,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 06:15:11,957 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 06:15:11,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 06:15:11,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641888647] [2023-08-24 06:15:11,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641888647] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 06:15:11,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 06:15:11,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-24 06:15:11,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876872598] [2023-08-24 06:15:11,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 06:15:11,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-24 06:15:11,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 06:15:11,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-24 06:15:11,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2023-08-24 06:15:11,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 404 [2023-08-24 06:15:11,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 414 transitions, 5185 flow. Second operand has 14 states, 14 states have (on average 130.71428571428572) internal successors, (1830), 14 states have internal predecessors, (1830), 0 states have call successors, (0), 0 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 06:15:11,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 06:15:11,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 404 [2023-08-24 06:15:11,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 06:15:14,913 INFO L124 PetriNetUnfolderBase]: 11659/17176 cut-off events. [2023-08-24 06:15:14,913 INFO L125 PetriNetUnfolderBase]: For 41566/41590 co-relation queries the response was YES. [2023-08-24 06:15:14,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61573 conditions, 17176 events. 11659/17176 cut-off events. For 41566/41590 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 93284 event pairs, 2213 based on Foata normal form. 24/16522 useless extension candidates. Maximal degree in co-relation 60569. Up to 10496 conditions per place. [2023-08-24 06:15:15,029 INFO L140 encePairwiseOnDemand]: 386/404 looper letters, 307 selfloop transitions, 427 changer transitions 0/735 dead transitions. [2023-08-24 06:15:15,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 735 transitions, 9678 flow [2023-08-24 06:15:15,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-24 06:15:15,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-24 06:15:15,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2319 transitions. [2023-08-24 06:15:15,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3587561881188119 [2023-08-24 06:15:15,036 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2319 transitions. [2023-08-24 06:15:15,036 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2319 transitions. [2023-08-24 06:15:15,037 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 06:15:15,038 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2319 transitions. [2023-08-24 06:15:15,042 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 144.9375) internal successors, (2319), 16 states have internal predecessors, (2319), 0 states have call successors, (0), 0 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 06:15:15,050 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 404.0) internal successors, (6868), 17 states have internal predecessors, (6868), 0 states have call successors, (0), 0 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 06:15:15,052 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 404.0) internal successors, (6868), 17 states have internal predecessors, (6868), 0 states have call successors, (0), 0 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 06:15:15,052 INFO L175 Difference]: Start difference. First operand has 132 places, 414 transitions, 5185 flow. Second operand 16 states and 2319 transitions. [2023-08-24 06:15:15,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 735 transitions, 9678 flow [2023-08-24 06:15:15,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 735 transitions, 9622 flow, removed 27 selfloop flow, removed 1 redundant places. [2023-08-24 06:15:15,716 INFO L231 Difference]: Finished difference. Result has 154 places, 556 transitions, 8269 flow [2023-08-24 06:15:15,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=5149, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=292, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=8269, PETRI_PLACES=154, PETRI_TRANSITIONS=556} [2023-08-24 06:15:15,717 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 99 predicate places. [2023-08-24 06:15:15,717 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 556 transitions, 8269 flow [2023-08-24 06:15:15,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 130.71428571428572) internal successors, (1830), 14 states have internal predecessors, (1830), 0 states have call successors, (0), 0 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 06:15:15,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:15:15,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 06:15:15,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-24 06:15:15,719 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION === [reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-08-24 06:15:15,719 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:15:15,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1462617299, now seen corresponding path program 3 times [2023-08-24 06:15:15,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:15:15,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814624851] [2023-08-24 06:15:15,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:15:15,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:15:15,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 06:15:16,547 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 06:15:16,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 06:15:16,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814624851] [2023-08-24 06:15:16,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814624851] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 06:15:16,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 06:15:16,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-24 06:15:16,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808886489] [2023-08-24 06:15:16,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 06:15:16,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-24 06:15:16,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 06:15:16,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-24 06:15:16,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2023-08-24 06:15:16,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 404 [2023-08-24 06:15:16,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 556 transitions, 8269 flow. Second operand has 14 states, 14 states have (on average 130.71428571428572) internal successors, (1830), 14 states have internal predecessors, (1830), 0 states have call successors, (0), 0 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 06:15:16,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 06:15:16,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 404 [2023-08-24 06:15:16,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 06:15:19,451 INFO L124 PetriNetUnfolderBase]: 11557/17144 cut-off events. [2023-08-24 06:15:19,451 INFO L125 PetriNetUnfolderBase]: For 53064/53108 co-relation queries the response was YES. [2023-08-24 06:15:19,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66050 conditions, 17144 events. 11557/17144 cut-off events. For 53064/53108 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 92557 event pairs, 3525 based on Foata normal form. 44/16552 useless extension candidates. Maximal degree in co-relation 63752. Up to 11304 conditions per place. [2023-08-24 06:15:19,560 INFO L140 encePairwiseOnDemand]: 390/404 looper letters, 264 selfloop transitions, 491 changer transitions 0/756 dead transitions. [2023-08-24 06:15:19,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 756 transitions, 12074 flow [2023-08-24 06:15:19,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 06:15:19,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 06:15:19,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1713 transitions. [2023-08-24 06:15:19,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3533415841584158 [2023-08-24 06:15:19,565 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1713 transitions. [2023-08-24 06:15:19,565 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1713 transitions. [2023-08-24 06:15:19,566 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 06:15:19,566 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1713 transitions. [2023-08-24 06:15:19,570 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 142.75) internal successors, (1713), 12 states have internal predecessors, (1713), 0 states have call successors, (0), 0 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 06:15:19,575 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 404.0) internal successors, (5252), 13 states have internal predecessors, (5252), 0 states have call successors, (0), 0 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 06:15:19,576 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 404.0) internal successors, (5252), 13 states have internal predecessors, (5252), 0 states have call successors, (0), 0 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 06:15:19,576 INFO L175 Difference]: Start difference. First operand has 154 places, 556 transitions, 8269 flow. Second operand 12 states and 1713 transitions. [2023-08-24 06:15:19,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 756 transitions, 12074 flow [2023-08-24 06:15:20,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 756 transitions, 11694 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-24 06:15:20,342 INFO L231 Difference]: Finished difference. Result has 169 places, 650 transitions, 10866 flow [2023-08-24 06:15:20,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=7909, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=394, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=10866, PETRI_PLACES=169, PETRI_TRANSITIONS=650} [2023-08-24 06:15:20,343 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 114 predicate places. [2023-08-24 06:15:20,344 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 650 transitions, 10866 flow [2023-08-24 06:15:20,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 130.71428571428572) internal successors, (1830), 14 states have internal predecessors, (1830), 0 states have call successors, (0), 0 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 06:15:20,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:15:20,344 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 06:15:20,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-24 06:15:20,345 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION === [reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-08-24 06:15:20,345 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:15:20,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1064228212, now seen corresponding path program 3 times [2023-08-24 06:15:20,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:15:20,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257489444] [2023-08-24 06:15:20,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:15:20,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:15:20,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 06:15:21,071 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 06:15:21,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 06:15:21,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257489444] [2023-08-24 06:15:21,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257489444] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 06:15:21,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 06:15:21,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-08-24 06:15:21,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818085307] [2023-08-24 06:15:21,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 06:15:21,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-24 06:15:21,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 06:15:21,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-24 06:15:21,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2023-08-24 06:15:21,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 404 [2023-08-24 06:15:21,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 650 transitions, 10866 flow. Second operand has 13 states, 13 states have (on average 130.84615384615384) internal successors, (1701), 13 states have internal predecessors, (1701), 0 states have call successors, (0), 0 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 06:15:21,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 06:15:21,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 404 [2023-08-24 06:15:21,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 06:15:23,672 INFO L124 PetriNetUnfolderBase]: 11719/17410 cut-off events. [2023-08-24 06:15:23,672 INFO L125 PetriNetUnfolderBase]: For 65650/65694 co-relation queries the response was YES. [2023-08-24 06:15:23,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70974 conditions, 17410 events. 11719/17410 cut-off events. For 65650/65694 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 94308 event pairs, 3788 based on Foata normal form. 44/16860 useless extension candidates. Maximal degree in co-relation 69445. Up to 11198 conditions per place. [2023-08-24 06:15:23,813 INFO L140 encePairwiseOnDemand]: 390/404 looper letters, 306 selfloop transitions, 607 changer transitions 0/914 dead transitions. [2023-08-24 06:15:23,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 914 transitions, 16286 flow [2023-08-24 06:15:23,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-24 06:15:23,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-24 06:15:23,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1575 transitions. [2023-08-24 06:15:23,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3544104410441044 [2023-08-24 06:15:23,817 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1575 transitions. [2023-08-24 06:15:23,817 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1575 transitions. [2023-08-24 06:15:23,817 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 06:15:23,817 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1575 transitions. [2023-08-24 06:15:23,819 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 143.1818181818182) internal successors, (1575), 11 states have internal predecessors, (1575), 0 states have call successors, (0), 0 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 06:15:23,824 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 404.0) internal successors, (4848), 12 states have internal predecessors, (4848), 0 states have call successors, (0), 0 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 06:15:23,824 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 404.0) internal successors, (4848), 12 states have internal predecessors, (4848), 0 states have call successors, (0), 0 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 06:15:23,824 INFO L175 Difference]: Start difference. First operand has 169 places, 650 transitions, 10866 flow. Second operand 11 states and 1575 transitions. [2023-08-24 06:15:23,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 914 transitions, 16286 flow [2023-08-24 06:15:24,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 914 transitions, 15096 flow, removed 15 selfloop flow, removed 5 redundant places. [2023-08-24 06:15:25,000 INFO L231 Difference]: Finished difference. Result has 179 places, 785 transitions, 13878 flow [2023-08-24 06:15:25,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=9884, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=647, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=469, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=13878, PETRI_PLACES=179, PETRI_TRANSITIONS=785} [2023-08-24 06:15:25,001 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 124 predicate places. [2023-08-24 06:15:25,001 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 785 transitions, 13878 flow [2023-08-24 06:15:25,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 130.84615384615384) internal successors, (1701), 13 states have internal predecessors, (1701), 0 states have call successors, (0), 0 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 06:15:25,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:15:25,002 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 06:15:25,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-24 06:15:25,002 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION === [reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-08-24 06:15:25,003 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:15:25,003 INFO L85 PathProgramCache]: Analyzing trace with hash 814000538, now seen corresponding path program 1 times [2023-08-24 06:15:25,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:15:25,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769597580] [2023-08-24 06:15:25,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:15:25,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:15:25,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 06:15:25,961 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 06:15:25,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 06:15:25,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769597580] [2023-08-24 06:15:25,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769597580] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 06:15:25,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 06:15:25,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-24 06:15:25,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677873423] [2023-08-24 06:15:25,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 06:15:25,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-24 06:15:25,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 06:15:25,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-24 06:15:25,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2023-08-24 06:15:25,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 404 [2023-08-24 06:15:25,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 785 transitions, 13878 flow. Second operand has 15 states, 15 states have (on average 122.73333333333333) internal successors, (1841), 15 states have internal predecessors, (1841), 0 states have call successors, (0), 0 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 06:15:25,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 06:15:25,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 404 [2023-08-24 06:15:25,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 06:15:30,485 INFO L124 PetriNetUnfolderBase]: 15781/23065 cut-off events. [2023-08-24 06:15:30,485 INFO L125 PetriNetUnfolderBase]: For 81015/81037 co-relation queries the response was YES. [2023-08-24 06:15:30,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90845 conditions, 23065 events. 15781/23065 cut-off events. For 81015/81037 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 124967 event pairs, 2977 based on Foata normal form. 191/22114 useless extension candidates. Maximal degree in co-relation 89324. Up to 10109 conditions per place. [2023-08-24 06:15:30,647 INFO L140 encePairwiseOnDemand]: 387/404 looper letters, 851 selfloop transitions, 286 changer transitions 0/1138 dead transitions. [2023-08-24 06:15:30,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 1138 transitions, 18566 flow [2023-08-24 06:15:30,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-24 06:15:30,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-24 06:15:30,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2515 transitions. [2023-08-24 06:15:30,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34584708470847086 [2023-08-24 06:15:30,652 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2515 transitions. [2023-08-24 06:15:30,652 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2515 transitions. [2023-08-24 06:15:30,652 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 06:15:30,652 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2515 transitions. [2023-08-24 06:15:30,656 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 139.72222222222223) internal successors, (2515), 18 states have internal predecessors, (2515), 0 states have call successors, (0), 0 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 06:15:30,663 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 404.0) internal successors, (7676), 19 states have internal predecessors, (7676), 0 states have call successors, (0), 0 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 06:15:30,664 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 404.0) internal successors, (7676), 19 states have internal predecessors, (7676), 0 states have call successors, (0), 0 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 06:15:30,664 INFO L175 Difference]: Start difference. First operand has 179 places, 785 transitions, 13878 flow. Second operand 18 states and 2515 transitions. [2023-08-24 06:15:30,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 1138 transitions, 18566 flow [2023-08-24 06:15:32,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 1138 transitions, 17890 flow, removed 9 selfloop flow, removed 4 redundant places. [2023-08-24 06:15:32,063 INFO L231 Difference]: Finished difference. Result has 196 places, 810 transitions, 13949 flow [2023-08-24 06:15:32,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=13202, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=785, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=270, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=514, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=13949, PETRI_PLACES=196, PETRI_TRANSITIONS=810} [2023-08-24 06:15:32,064 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 141 predicate places. [2023-08-24 06:15:32,064 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 810 transitions, 13949 flow [2023-08-24 06:15:32,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 122.73333333333333) internal successors, (1841), 15 states have internal predecessors, (1841), 0 states have call successors, (0), 0 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 06:15:32,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:15:32,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 06:15:32,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-24 06:15:32,065 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION === [reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-08-24 06:15:32,066 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:15:32,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1729072997, now seen corresponding path program 1 times [2023-08-24 06:15:32,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:15:32,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961097740] [2023-08-24 06:15:32,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:15:32,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:15:32,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 06:15:32,967 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 06:15:32,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 06:15:32,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961097740] [2023-08-24 06:15:32,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961097740] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 06:15:32,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 06:15:32,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-24 06:15:32,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432595567] [2023-08-24 06:15:32,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 06:15:32,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-24 06:15:32,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 06:15:32,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-24 06:15:32,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2023-08-24 06:15:32,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 404 [2023-08-24 06:15:32,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 810 transitions, 13949 flow. Second operand has 15 states, 15 states have (on average 122.73333333333333) internal successors, (1841), 15 states have internal predecessors, (1841), 0 states have call successors, (0), 0 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 06:15:32,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 06:15:32,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 404 [2023-08-24 06:15:32,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 06:15:39,076 INFO L124 PetriNetUnfolderBase]: 21539/31459 cut-off events. [2023-08-24 06:15:39,076 INFO L125 PetriNetUnfolderBase]: For 116248/116286 co-relation queries the response was YES. [2023-08-24 06:15:39,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127974 conditions, 31459 events. 21539/31459 cut-off events. For 116248/116286 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 178000 event pairs, 4448 based on Foata normal form. 458/30654 useless extension candidates. Maximal degree in co-relation 126519. Up to 17559 conditions per place. [2023-08-24 06:15:39,382 INFO L140 encePairwiseOnDemand]: 387/404 looper letters, 976 selfloop transitions, 304 changer transitions 0/1281 dead transitions. [2023-08-24 06:15:39,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 1281 transitions, 21531 flow [2023-08-24 06:15:39,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-24 06:15:39,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-24 06:15:39,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2514 transitions. [2023-08-24 06:15:39,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3457095709570957 [2023-08-24 06:15:39,386 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2514 transitions. [2023-08-24 06:15:39,386 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2514 transitions. [2023-08-24 06:15:39,386 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 06:15:39,387 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2514 transitions. [2023-08-24 06:15:39,390 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 139.66666666666666) internal successors, (2514), 18 states have internal predecessors, (2514), 0 states have call successors, (0), 0 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 06:15:39,395 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 404.0) internal successors, (7676), 19 states have internal predecessors, (7676), 0 states have call successors, (0), 0 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 06:15:39,396 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 404.0) internal successors, (7676), 19 states have internal predecessors, (7676), 0 states have call successors, (0), 0 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 06:15:39,396 INFO L175 Difference]: Start difference. First operand has 196 places, 810 transitions, 13949 flow. Second operand 18 states and 2514 transitions. [2023-08-24 06:15:39,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 1281 transitions, 21531 flow [2023-08-24 06:15:41,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 1281 transitions, 21149 flow, removed 21 selfloop flow, removed 7 redundant places. [2023-08-24 06:15:41,822 INFO L231 Difference]: Finished difference. Result has 213 places, 894 transitions, 15555 flow [2023-08-24 06:15:41,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=13619, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=810, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=228, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=571, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=15555, PETRI_PLACES=213, PETRI_TRANSITIONS=894} [2023-08-24 06:15:41,823 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 158 predicate places. [2023-08-24 06:15:41,823 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 894 transitions, 15555 flow [2023-08-24 06:15:41,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 122.73333333333333) internal successors, (1841), 15 states have internal predecessors, (1841), 0 states have call successors, (0), 0 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 06:15:41,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:15:41,824 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 06:15:41,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-24 06:15:41,824 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION === [reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-08-24 06:15:41,824 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:15:41,825 INFO L85 PathProgramCache]: Analyzing trace with hash 372971985, now seen corresponding path program 2 times [2023-08-24 06:15:41,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:15:41,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035398914] [2023-08-24 06:15:41,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:15:41,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:15:41,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 06:15:42,691 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 06:15:42,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 06:15:42,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035398914] [2023-08-24 06:15:42,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035398914] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 06:15:42,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 06:15:42,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-24 06:15:42,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522377470] [2023-08-24 06:15:42,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 06:15:42,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-24 06:15:42,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 06:15:42,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-24 06:15:42,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2023-08-24 06:15:42,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 404 [2023-08-24 06:15:42,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 894 transitions, 15555 flow. Second operand has 15 states, 15 states have (on average 122.73333333333333) internal successors, (1841), 15 states have internal predecessors, (1841), 0 states have call successors, (0), 0 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 06:15:42,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 06:15:42,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 404 [2023-08-24 06:15:42,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 06:15:50,524 INFO L124 PetriNetUnfolderBase]: 27021/39368 cut-off events. [2023-08-24 06:15:50,524 INFO L125 PetriNetUnfolderBase]: For 160151/160264 co-relation queries the response was YES. [2023-08-24 06:15:50,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 166727 conditions, 39368 events. 27021/39368 cut-off events. For 160151/160264 co-relation queries the response was YES. Maximal size of possible extension queue 598. Compared 231200 event pairs, 4738 based on Foata normal form. 387/38083 useless extension candidates. Maximal degree in co-relation 165268. Up to 23964 conditions per place. [2023-08-24 06:15:51,023 INFO L140 encePairwiseOnDemand]: 387/404 looper letters, 1058 selfloop transitions, 383 changer transitions 0/1442 dead transitions. [2023-08-24 06:15:51,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 1442 transitions, 24040 flow [2023-08-24 06:15:51,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-24 06:15:51,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-24 06:15:51,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2646 transitions. [2023-08-24 06:15:51,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3447107868681605 [2023-08-24 06:15:51,026 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2646 transitions. [2023-08-24 06:15:51,026 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2646 transitions. [2023-08-24 06:15:51,026 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 06:15:51,026 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2646 transitions. [2023-08-24 06:15:51,031 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 139.26315789473685) internal successors, (2646), 19 states have internal predecessors, (2646), 0 states have call successors, (0), 0 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 06:15:51,036 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 404.0) internal successors, (8080), 20 states have internal predecessors, (8080), 0 states have call successors, (0), 0 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 06:15:51,036 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 404.0) internal successors, (8080), 20 states have internal predecessors, (8080), 0 states have call successors, (0), 0 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 06:15:51,036 INFO L175 Difference]: Start difference. First operand has 213 places, 894 transitions, 15555 flow. Second operand 19 states and 2646 transitions. [2023-08-24 06:15:51,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 1442 transitions, 24040 flow [2023-08-24 06:15:54,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 1442 transitions, 23832 flow, removed 51 selfloop flow, removed 4 redundant places. [2023-08-24 06:15:54,683 INFO L231 Difference]: Finished difference. Result has 232 places, 971 transitions, 17483 flow [2023-08-24 06:15:54,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=15347, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=894, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=314, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=574, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=17483, PETRI_PLACES=232, PETRI_TRANSITIONS=971} [2023-08-24 06:15:54,684 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 177 predicate places. [2023-08-24 06:15:54,684 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 971 transitions, 17483 flow [2023-08-24 06:15:54,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 122.73333333333333) internal successors, (1841), 15 states have internal predecessors, (1841), 0 states have call successors, (0), 0 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 06:15:54,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:15:54,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 06:15:54,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-24 06:15:54,685 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION === [reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-08-24 06:15:54,686 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:15:54,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1967284911, now seen corresponding path program 3 times [2023-08-24 06:15:54,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:15:54,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481722237] [2023-08-24 06:15:54,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:15:54,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:15:54,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 06:15:55,510 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 06:15:55,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 06:15:55,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481722237] [2023-08-24 06:15:55,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481722237] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 06:15:55,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 06:15:55,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-24 06:15:55,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805217903] [2023-08-24 06:15:55,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 06:15:55,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-24 06:15:55,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 06:15:55,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-24 06:15:55,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2023-08-24 06:15:55,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 404 [2023-08-24 06:15:55,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 971 transitions, 17483 flow. Second operand has 15 states, 15 states have (on average 122.73333333333333) internal successors, (1841), 15 states have internal predecessors, (1841), 0 states have call successors, (0), 0 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 06:15:55,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 06:15:55,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 404 [2023-08-24 06:15:55,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 06:16:04,697 INFO L124 PetriNetUnfolderBase]: 31241/45494 cut-off events. [2023-08-24 06:16:04,697 INFO L125 PetriNetUnfolderBase]: For 211351/211483 co-relation queries the response was YES. [2023-08-24 06:16:05,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 196369 conditions, 45494 events. 31241/45494 cut-off events. For 211351/211483 co-relation queries the response was YES. Maximal size of possible extension queue 655. Compared 271615 event pairs, 6057 based on Foata normal form. 406/43819 useless extension candidates. Maximal degree in co-relation 194860. Up to 27883 conditions per place. [2023-08-24 06:16:05,312 INFO L140 encePairwiseOnDemand]: 388/404 looper letters, 995 selfloop transitions, 399 changer transitions 0/1395 dead transitions. [2023-08-24 06:16:05,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 1395 transitions, 23409 flow [2023-08-24 06:16:05,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-24 06:16:05,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-24 06:16:05,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2508 transitions. [2023-08-24 06:16:05,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3448844884488449 [2023-08-24 06:16:05,316 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2508 transitions. [2023-08-24 06:16:05,316 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2508 transitions. [2023-08-24 06:16:05,316 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 06:16:05,316 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2508 transitions. [2023-08-24 06:16:05,319 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 139.33333333333334) internal successors, (2508), 18 states have internal predecessors, (2508), 0 states have call successors, (0), 0 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 06:16:05,323 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 404.0) internal successors, (7676), 19 states have internal predecessors, (7676), 0 states have call successors, (0), 0 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 06:16:05,324 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 404.0) internal successors, (7676), 19 states have internal predecessors, (7676), 0 states have call successors, (0), 0 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 06:16:05,324 INFO L175 Difference]: Start difference. First operand has 232 places, 971 transitions, 17483 flow. Second operand 18 states and 2508 transitions. [2023-08-24 06:16:05,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 1395 transitions, 23409 flow [2023-08-24 06:16:09,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 1395 transitions, 23096 flow, removed 101 selfloop flow, removed 5 redundant places. [2023-08-24 06:16:09,122 INFO L231 Difference]: Finished difference. Result has 247 places, 997 transitions, 18319 flow [2023-08-24 06:16:09,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=17186, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=971, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=381, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=589, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=18319, PETRI_PLACES=247, PETRI_TRANSITIONS=997} [2023-08-24 06:16:09,123 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 192 predicate places. [2023-08-24 06:16:09,123 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 997 transitions, 18319 flow [2023-08-24 06:16:09,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 122.73333333333333) internal successors, (1841), 15 states have internal predecessors, (1841), 0 states have call successors, (0), 0 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 06:16:09,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:16:09,124 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 06:16:09,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-24 06:16:09,124 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION === [reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-08-24 06:16:09,124 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:16:09,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1197017553, now seen corresponding path program 4 times [2023-08-24 06:16:09,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:16:09,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164631411] [2023-08-24 06:16:09,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:16:09,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:16:09,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 06:16:09,900 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 06:16:09,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 06:16:09,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164631411] [2023-08-24 06:16:09,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164631411] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 06:16:09,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 06:16:09,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-24 06:16:09,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124007920] [2023-08-24 06:16:09,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 06:16:09,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-24 06:16:09,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 06:16:09,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-24 06:16:09,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2023-08-24 06:16:09,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 404 [2023-08-24 06:16:09,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 997 transitions, 18319 flow. Second operand has 15 states, 15 states have (on average 122.73333333333333) internal successors, (1841), 15 states have internal predecessors, (1841), 0 states have call successors, (0), 0 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 06:16:09,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 06:16:09,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 404 [2023-08-24 06:16:09,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 06:16:18,800 INFO L124 PetriNetUnfolderBase]: 30882/45135 cut-off events. [2023-08-24 06:16:18,800 INFO L125 PetriNetUnfolderBase]: For 213433/213473 co-relation queries the response was YES. [2023-08-24 06:16:19,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 194372 conditions, 45135 events. 30882/45135 cut-off events. For 213433/213473 co-relation queries the response was YES. Maximal size of possible extension queue 639. Compared 269216 event pairs, 7541 based on Foata normal form. 126/43180 useless extension candidates. Maximal degree in co-relation 192827. Up to 29611 conditions per place. [2023-08-24 06:16:19,452 INFO L140 encePairwiseOnDemand]: 389/404 looper letters, 941 selfloop transitions, 380 changer transitions 0/1322 dead transitions. [2023-08-24 06:16:19,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 1322 transitions, 23291 flow [2023-08-24 06:16:19,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-24 06:16:19,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-24 06:16:19,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2508 transitions. [2023-08-24 06:16:19,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3448844884488449 [2023-08-24 06:16:19,455 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2508 transitions. [2023-08-24 06:16:19,455 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2508 transitions. [2023-08-24 06:16:19,455 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 06:16:19,455 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2508 transitions. [2023-08-24 06:16:19,458 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 139.33333333333334) internal successors, (2508), 18 states have internal predecessors, (2508), 0 states have call successors, (0), 0 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 06:16:19,462 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 404.0) internal successors, (7676), 19 states have internal predecessors, (7676), 0 states have call successors, (0), 0 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 06:16:19,463 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 404.0) internal successors, (7676), 19 states have internal predecessors, (7676), 0 states have call successors, (0), 0 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 06:16:19,463 INFO L175 Difference]: Start difference. First operand has 247 places, 997 transitions, 18319 flow. Second operand 18 states and 2508 transitions. [2023-08-24 06:16:19,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 1322 transitions, 23291 flow [2023-08-24 06:16:23,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 1322 transitions, 22740 flow, removed 99 selfloop flow, removed 7 redundant places. [2023-08-24 06:16:23,167 INFO L231 Difference]: Finished difference. Result has 257 places, 994 transitions, 18512 flow [2023-08-24 06:16:23,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=17752, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=994, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=380, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=614, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=18512, PETRI_PLACES=257, PETRI_TRANSITIONS=994} [2023-08-24 06:16:23,168 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 202 predicate places. [2023-08-24 06:16:23,168 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 994 transitions, 18512 flow [2023-08-24 06:16:23,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 122.73333333333333) internal successors, (1841), 15 states have internal predecessors, (1841), 0 states have call successors, (0), 0 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 06:16:23,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:16:23,168 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 06:16:23,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-24 06:16:23,169 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION === [reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-08-24 06:16:23,169 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:16:23,169 INFO L85 PathProgramCache]: Analyzing trace with hash -43978566, now seen corresponding path program 1 times [2023-08-24 06:16:23,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:16:23,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189410586] [2023-08-24 06:16:23,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:16:23,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:16:23,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 06:16:23,898 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 06:16:23,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 06:16:23,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189410586] [2023-08-24 06:16:23,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189410586] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 06:16:23,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 06:16:23,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-08-24 06:16:23,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517507596] [2023-08-24 06:16:23,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 06:16:23,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-24 06:16:23,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 06:16:23,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-24 06:16:23,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2023-08-24 06:16:23,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 404 [2023-08-24 06:16:23,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 994 transitions, 18512 flow. Second operand has 14 states, 14 states have (on average 122.85714285714286) internal successors, (1720), 14 states have internal predecessors, (1720), 0 states have call successors, (0), 0 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 06:16:23,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 06:16:23,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 404 [2023-08-24 06:16:23,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 06:16:33,264 INFO L124 PetriNetUnfolderBase]: 34450/50143 cut-off events. [2023-08-24 06:16:33,265 INFO L125 PetriNetUnfolderBase]: For 241727/241942 co-relation queries the response was YES. [2023-08-24 06:16:34,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 212206 conditions, 50143 events. 34450/50143 cut-off events. For 241727/241942 co-relation queries the response was YES. Maximal size of possible extension queue 675. Compared 303144 event pairs, 7902 based on Foata normal form. 798/48451 useless extension candidates. Maximal degree in co-relation 210742. Up to 35188 conditions per place. [2023-08-24 06:16:34,193 INFO L140 encePairwiseOnDemand]: 387/404 looper letters, 989 selfloop transitions, 380 changer transitions 0/1370 dead transitions. [2023-08-24 06:16:34,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 1370 transitions, 24740 flow [2023-08-24 06:16:34,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-24 06:16:34,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-24 06:16:34,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2370 transitions. [2023-08-24 06:16:34,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34507862550960977 [2023-08-24 06:16:34,195 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2370 transitions. [2023-08-24 06:16:34,195 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2370 transitions. [2023-08-24 06:16:34,196 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 06:16:34,196 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2370 transitions. [2023-08-24 06:16:34,198 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 139.41176470588235) internal successors, (2370), 17 states have internal predecessors, (2370), 0 states have call successors, (0), 0 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 06:16:34,203 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 404.0) internal successors, (7272), 18 states have internal predecessors, (7272), 0 states have call successors, (0), 0 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 06:16:34,203 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 404.0) internal successors, (7272), 18 states have internal predecessors, (7272), 0 states have call successors, (0), 0 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 06:16:34,203 INFO L175 Difference]: Start difference. First operand has 257 places, 994 transitions, 18512 flow. Second operand 17 states and 2370 transitions. [2023-08-24 06:16:34,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 1370 transitions, 24740 flow [2023-08-24 06:16:37,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 1370 transitions, 23762 flow, removed 0 selfloop flow, removed 16 redundant places. [2023-08-24 06:16:38,010 INFO L231 Difference]: Finished difference. Result has 261 places, 1016 transitions, 18856 flow [2023-08-24 06:16:38,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=17758, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=994, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=366, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=627, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=18856, PETRI_PLACES=261, PETRI_TRANSITIONS=1016} [2023-08-24 06:16:38,011 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 206 predicate places. [2023-08-24 06:16:38,011 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 1016 transitions, 18856 flow [2023-08-24 06:16:38,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 122.85714285714286) internal successors, (1720), 14 states have internal predecessors, (1720), 0 states have call successors, (0), 0 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 06:16:38,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:16:38,011 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 06:16:38,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-24 06:16:38,012 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION === [reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-08-24 06:16:38,012 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:16:38,012 INFO L85 PathProgramCache]: Analyzing trace with hash 81182322, now seen corresponding path program 2 times [2023-08-24 06:16:38,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:16:38,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824652215] [2023-08-24 06:16:38,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:16:38,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:16:38,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 06:16:38,719 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 06:16:38,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 06:16:38,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824652215] [2023-08-24 06:16:38,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824652215] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 06:16:38,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 06:16:38,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-24 06:16:38,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891900480] [2023-08-24 06:16:38,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 06:16:38,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-24 06:16:38,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 06:16:38,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-24 06:16:38,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2023-08-24 06:16:38,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 404 [2023-08-24 06:16:38,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 1016 transitions, 18856 flow. Second operand has 15 states, 15 states have (on average 122.73333333333333) internal successors, (1841), 15 states have internal predecessors, (1841), 0 states have call successors, (0), 0 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 06:16:38,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 06:16:38,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 404 [2023-08-24 06:16:38,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 06:16:48,541 INFO L124 PetriNetUnfolderBase]: 34187/49790 cut-off events. [2023-08-24 06:16:48,541 INFO L125 PetriNetUnfolderBase]: For 261804/261930 co-relation queries the response was YES. [2023-08-24 06:16:49,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 217704 conditions, 49790 events. 34187/49790 cut-off events. For 261804/261930 co-relation queries the response was YES. Maximal size of possible extension queue 667. Compared 302454 event pairs, 7681 based on Foata normal form. 212/47561 useless extension candidates. Maximal degree in co-relation 216220. Up to 35419 conditions per place. [2023-08-24 06:16:49,341 INFO L140 encePairwiseOnDemand]: 389/404 looper letters, 1102 selfloop transitions, 381 changer transitions 0/1484 dead transitions. [2023-08-24 06:16:49,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 1484 transitions, 26545 flow [2023-08-24 06:16:49,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-24 06:16:49,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-24 06:16:49,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2642 transitions. [2023-08-24 06:16:49,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34418968212610734 [2023-08-24 06:16:49,345 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2642 transitions. [2023-08-24 06:16:49,345 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2642 transitions. [2023-08-24 06:16:49,346 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 06:16:49,346 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2642 transitions. [2023-08-24 06:16:49,349 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 139.05263157894737) internal successors, (2642), 19 states have internal predecessors, (2642), 0 states have call successors, (0), 0 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 06:16:49,354 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 404.0) internal successors, (8080), 20 states have internal predecessors, (8080), 0 states have call successors, (0), 0 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 06:16:49,355 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 404.0) internal successors, (8080), 20 states have internal predecessors, (8080), 0 states have call successors, (0), 0 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 06:16:49,355 INFO L175 Difference]: Start difference. First operand has 261 places, 1016 transitions, 18856 flow. Second operand 19 states and 2642 transitions. [2023-08-24 06:16:49,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 1484 transitions, 26545 flow [2023-08-24 06:16:54,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 1484 transitions, 25950 flow, removed 37 selfloop flow, removed 6 redundant places. [2023-08-24 06:16:54,113 INFO L231 Difference]: Finished difference. Result has 274 places, 1014 transitions, 19181 flow [2023-08-24 06:16:54,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=18411, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1014, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=381, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=633, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=19181, PETRI_PLACES=274, PETRI_TRANSITIONS=1014} [2023-08-24 06:16:54,115 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 219 predicate places. [2023-08-24 06:16:54,115 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 1014 transitions, 19181 flow [2023-08-24 06:16:54,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 122.73333333333333) internal successors, (1841), 15 states have internal predecessors, (1841), 0 states have call successors, (0), 0 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 06:16:54,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:16:54,115 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 06:16:54,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-24 06:16:54,116 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION === [reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-08-24 06:16:54,116 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:16:54,116 INFO L85 PathProgramCache]: Analyzing trace with hash 522817811, now seen corresponding path program 5 times [2023-08-24 06:16:54,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:16:54,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44842117] [2023-08-24 06:16:54,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:16:54,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:16:54,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 06:16:54,866 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 06:16:54,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 06:16:54,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44842117] [2023-08-24 06:16:54,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44842117] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 06:16:54,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 06:16:54,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-24 06:16:54,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574407915] [2023-08-24 06:16:54,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 06:16:54,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-24 06:16:54,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 06:16:54,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-24 06:16:54,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2023-08-24 06:16:54,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 404 [2023-08-24 06:16:54,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 1014 transitions, 19181 flow. Second operand has 15 states, 15 states have (on average 122.73333333333333) internal successors, (1841), 15 states have internal predecessors, (1841), 0 states have call successors, (0), 0 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 06:16:54,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 06:16:54,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 404 [2023-08-24 06:16:54,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 06:17:06,277 INFO L124 PetriNetUnfolderBase]: 39346/57170 cut-off events. [2023-08-24 06:17:06,277 INFO L125 PetriNetUnfolderBase]: For 320280/320406 co-relation queries the response was YES. [2023-08-24 06:17:07,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 251596 conditions, 57170 events. 39346/57170 cut-off events. For 320280/320406 co-relation queries the response was YES. Maximal size of possible extension queue 782. Compared 353863 event pairs, 7332 based on Foata normal form. 400/54699 useless extension candidates. Maximal degree in co-relation 250091. Up to 35572 conditions per place. [2023-08-24 06:17:07,217 INFO L140 encePairwiseOnDemand]: 388/404 looper letters, 1010 selfloop transitions, 433 changer transitions 0/1444 dead transitions. [2023-08-24 06:17:07,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 1444 transitions, 25530 flow [2023-08-24 06:17:07,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-24 06:17:07,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-24 06:17:07,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2657 transitions. [2023-08-24 06:17:07,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3461438249088067 [2023-08-24 06:17:07,220 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2657 transitions. [2023-08-24 06:17:07,220 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2657 transitions. [2023-08-24 06:17:07,221 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 06:17:07,221 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2657 transitions. [2023-08-24 06:17:07,224 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 139.8421052631579) internal successors, (2657), 19 states have internal predecessors, (2657), 0 states have call successors, (0), 0 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 06:17:07,228 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 404.0) internal successors, (8080), 20 states have internal predecessors, (8080), 0 states have call successors, (0), 0 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 06:17:07,229 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 404.0) internal successors, (8080), 20 states have internal predecessors, (8080), 0 states have call successors, (0), 0 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 06:17:07,229 INFO L175 Difference]: Start difference. First operand has 274 places, 1014 transitions, 19181 flow. Second operand 19 states and 2657 transitions. [2023-08-24 06:17:07,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 1444 transitions, 25530 flow [2023-08-24 06:17:12,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 1444 transitions, 24801 flow, removed 0 selfloop flow, removed 17 redundant places. [2023-08-24 06:17:12,480 INFO L231 Difference]: Finished difference. Result has 281 places, 1048 transitions, 19971 flow [2023-08-24 06:17:12,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=18452, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1014, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=409, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=601, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=19971, PETRI_PLACES=281, PETRI_TRANSITIONS=1048} [2023-08-24 06:17:12,481 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 226 predicate places. [2023-08-24 06:17:12,482 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 1048 transitions, 19971 flow [2023-08-24 06:17:12,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 122.73333333333333) internal successors, (1841), 15 states have internal predecessors, (1841), 0 states have call successors, (0), 0 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 06:17:12,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:17:12,482 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 06:17:12,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-24 06:17:12,482 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION === [reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-08-24 06:17:12,483 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:17:12,483 INFO L85 PathProgramCache]: Analyzing trace with hash -962456401, now seen corresponding path program 6 times [2023-08-24 06:17:12,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:17:12,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714851877] [2023-08-24 06:17:12,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:17:12,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:17:12,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 06:17:13,252 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 06:17:13,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 06:17:13,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714851877] [2023-08-24 06:17:13,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714851877] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 06:17:13,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 06:17:13,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-24 06:17:13,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143208151] [2023-08-24 06:17:13,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 06:17:13,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-24 06:17:13,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 06:17:13,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-24 06:17:13,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2023-08-24 06:17:13,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 404 [2023-08-24 06:17:13,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 1048 transitions, 19971 flow. Second operand has 15 states, 15 states have (on average 122.73333333333333) internal successors, (1841), 15 states have internal predecessors, (1841), 0 states have call successors, (0), 0 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 06:17:13,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 06:17:13,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 404 [2023-08-24 06:17:13,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 06:17:25,849 INFO L124 PetriNetUnfolderBase]: 42592/61888 cut-off events. [2023-08-24 06:17:25,849 INFO L125 PetriNetUnfolderBase]: For 401201/401288 co-relation queries the response was YES. [2023-08-24 06:17:26,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 276475 conditions, 61888 events. 42592/61888 cut-off events. For 401201/401288 co-relation queries the response was YES. Maximal size of possible extension queue 905. Compared 386350 event pairs, 10719 based on Foata normal form. 361/58990 useless extension candidates. Maximal degree in co-relation 274953. Up to 47405 conditions per place. [2023-08-24 06:17:26,979 INFO L140 encePairwiseOnDemand]: 388/404 looper letters, 1202 selfloop transitions, 352 changer transitions 0/1555 dead transitions. [2023-08-24 06:17:26,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 1555 transitions, 29186 flow [2023-08-24 06:17:26,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-24 06:17:26,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-24 06:17:26,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2510 transitions. [2023-08-24 06:17:26,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34515951595159516 [2023-08-24 06:17:26,982 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2510 transitions. [2023-08-24 06:17:26,982 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2510 transitions. [2023-08-24 06:17:26,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 06:17:26,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2510 transitions. [2023-08-24 06:17:26,986 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 139.44444444444446) internal successors, (2510), 18 states have internal predecessors, (2510), 0 states have call successors, (0), 0 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 06:17:26,991 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 404.0) internal successors, (7676), 19 states have internal predecessors, (7676), 0 states have call successors, (0), 0 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 06:17:26,992 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 404.0) internal successors, (7676), 19 states have internal predecessors, (7676), 0 states have call successors, (0), 0 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 06:17:26,992 INFO L175 Difference]: Start difference. First operand has 281 places, 1048 transitions, 19971 flow. Second operand 18 states and 2510 transitions. [2023-08-24 06:17:26,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 1555 transitions, 29186 flow [2023-08-24 06:17:33,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 1555 transitions, 28517 flow, removed 163 selfloop flow, removed 6 redundant places. [2023-08-24 06:17:33,721 INFO L231 Difference]: Finished difference. Result has 294 places, 1065 transitions, 20306 flow [2023-08-24 06:17:33,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=19253, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1046, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=341, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=704, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=20306, PETRI_PLACES=294, PETRI_TRANSITIONS=1065} [2023-08-24 06:17:33,722 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 239 predicate places. [2023-08-24 06:17:33,722 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 1065 transitions, 20306 flow [2023-08-24 06:17:33,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 122.73333333333333) internal successors, (1841), 15 states have internal predecessors, (1841), 0 states have call successors, (0), 0 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 06:17:33,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:17:33,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 06:17:33,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-24 06:17:33,722 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION === [reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-08-24 06:17:33,723 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:17:33,723 INFO L85 PathProgramCache]: Analyzing trace with hash 601648512, now seen corresponding path program 2 times [2023-08-24 06:17:33,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:17:33,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705314441] [2023-08-24 06:17:33,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:17:33,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:17:33,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 06:17:34,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 06:17:34,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 06:17:34,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705314441] [2023-08-24 06:17:34,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705314441] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 06:17:34,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 06:17:34,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-08-24 06:17:34,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460320590] [2023-08-24 06:17:34,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 06:17:34,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-24 06:17:34,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 06:17:34,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-24 06:17:34,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2023-08-24 06:17:34,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 404 [2023-08-24 06:17:34,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 1065 transitions, 20306 flow. Second operand has 14 states, 14 states have (on average 122.85714285714286) internal successors, (1720), 14 states have internal predecessors, (1720), 0 states have call successors, (0), 0 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 06:17:34,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 06:17:34,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 404 [2023-08-24 06:17:34,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 06:17:49,809 INFO L124 PetriNetUnfolderBase]: 47863/69539 cut-off events. [2023-08-24 06:17:49,809 INFO L125 PetriNetUnfolderBase]: For 472039/472318 co-relation queries the response was YES. [2023-08-24 06:17:50,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 312358 conditions, 69539 events. 47863/69539 cut-off events. For 472039/472318 co-relation queries the response was YES. Maximal size of possible extension queue 1016. Compared 441861 event pairs, 12894 based on Foata normal form. 686/66557 useless extension candidates. Maximal degree in co-relation 310833. Up to 53870 conditions per place. [2023-08-24 06:17:51,126 INFO L140 encePairwiseOnDemand]: 387/404 looper letters, 1154 selfloop transitions, 417 changer transitions 0/1572 dead transitions. [2023-08-24 06:17:51,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 1572 transitions, 29510 flow [2023-08-24 06:17:51,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-24 06:17:51,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-24 06:17:51,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2508 transitions. [2023-08-24 06:17:51,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3448844884488449 [2023-08-24 06:17:51,129 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2508 transitions. [2023-08-24 06:17:51,129 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2508 transitions. [2023-08-24 06:17:51,129 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 06:17:51,129 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2508 transitions. [2023-08-24 06:17:51,131 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 139.33333333333334) internal successors, (2508), 18 states have internal predecessors, (2508), 0 states have call successors, (0), 0 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 06:17:51,136 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 404.0) internal successors, (7676), 19 states have internal predecessors, (7676), 0 states have call successors, (0), 0 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 06:17:51,136 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 404.0) internal successors, (7676), 19 states have internal predecessors, (7676), 0 states have call successors, (0), 0 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 06:17:51,136 INFO L175 Difference]: Start difference. First operand has 294 places, 1065 transitions, 20306 flow. Second operand 18 states and 2508 transitions. [2023-08-24 06:17:51,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 1572 transitions, 29510 flow [2023-08-24 06:17:58,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 1572 transitions, 28093 flow, removed 191 selfloop flow, removed 14 redundant places. [2023-08-24 06:17:58,902 INFO L231 Difference]: Finished difference. Result has 303 places, 1147 transitions, 22305 flow [2023-08-24 06:17:58,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=19477, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1065, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=343, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=715, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=22305, PETRI_PLACES=303, PETRI_TRANSITIONS=1147} [2023-08-24 06:17:58,903 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 248 predicate places. [2023-08-24 06:17:58,903 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 1147 transitions, 22305 flow [2023-08-24 06:17:58,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 122.85714285714286) internal successors, (1720), 14 states have internal predecessors, (1720), 0 states have call successors, (0), 0 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 06:17:58,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:17:58,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 06:17:58,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-24 06:17:58,903 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION === [reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-08-24 06:17:58,904 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:17:58,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1357840904, now seen corresponding path program 3 times [2023-08-24 06:17:58,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:17:58,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263225643] [2023-08-24 06:17:58,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:17:58,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:17:58,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 06:17:59,627 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 06:17:59,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 06:17:59,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263225643] [2023-08-24 06:17:59,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263225643] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 06:17:59,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 06:17:59,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-08-24 06:17:59,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639031679] [2023-08-24 06:17:59,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 06:17:59,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-24 06:17:59,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 06:17:59,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-24 06:17:59,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2023-08-24 06:17:59,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 404 [2023-08-24 06:17:59,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 1147 transitions, 22305 flow. Second operand has 14 states, 14 states have (on average 122.85714285714286) internal successors, (1720), 14 states have internal predecessors, (1720), 0 states have call successors, (0), 0 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 06:17:59,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 06:17:59,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 404 [2023-08-24 06:17:59,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 06:18:15,051 INFO L124 PetriNetUnfolderBase]: 52147/75729 cut-off events. [2023-08-24 06:18:15,052 INFO L125 PetriNetUnfolderBase]: For 570215/570506 co-relation queries the response was YES. [2023-08-24 06:18:16,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 346846 conditions, 75729 events. 52147/75729 cut-off events. For 570215/570506 co-relation queries the response was YES. Maximal size of possible extension queue 1140. Compared 486225 event pairs, 13653 based on Foata normal form. 548/72200 useless extension candidates. Maximal degree in co-relation 345310. Up to 57848 conditions per place. [2023-08-24 06:18:16,435 INFO L140 encePairwiseOnDemand]: 388/404 looper letters, 1133 selfloop transitions, 441 changer transitions 0/1575 dead transitions. [2023-08-24 06:18:16,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 1575 transitions, 29099 flow [2023-08-24 06:18:16,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-24 06:18:16,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-24 06:18:16,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2372 transitions. [2023-08-24 06:18:16,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34536983110075714 [2023-08-24 06:18:16,437 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2372 transitions. [2023-08-24 06:18:16,437 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2372 transitions. [2023-08-24 06:18:16,437 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 06:18:16,437 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2372 transitions. [2023-08-24 06:18:16,439 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 139.52941176470588) internal successors, (2372), 17 states have internal predecessors, (2372), 0 states have call successors, (0), 0 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 06:18:16,442 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 404.0) internal successors, (7272), 18 states have internal predecessors, (7272), 0 states have call successors, (0), 0 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 06:18:16,442 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 404.0) internal successors, (7272), 18 states have internal predecessors, (7272), 0 states have call successors, (0), 0 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 06:18:16,442 INFO L175 Difference]: Start difference. First operand has 303 places, 1147 transitions, 22305 flow. Second operand 17 states and 2372 transitions. [2023-08-24 06:18:16,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 1575 transitions, 29099 flow [2023-08-24 06:18:26,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 1575 transitions, 28811 flow, removed 92 selfloop flow, removed 4 redundant places. [2023-08-24 06:18:26,220 INFO L231 Difference]: Finished difference. Result has 318 places, 1173 transitions, 23422 flow [2023-08-24 06:18:26,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=22025, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=423, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=723, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=23422, PETRI_PLACES=318, PETRI_TRANSITIONS=1173} [2023-08-24 06:18:26,221 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 263 predicate places. [2023-08-24 06:18:26,221 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 1173 transitions, 23422 flow [2023-08-24 06:18:26,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 122.85714285714286) internal successors, (1720), 14 states have internal predecessors, (1720), 0 states have call successors, (0), 0 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 06:18:26,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:18:26,221 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 06:18:26,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-24 06:18:26,221 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION === [reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-08-24 06:18:26,221 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:18:26,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1332005844, now seen corresponding path program 4 times [2023-08-24 06:18:26,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:18:26,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886590213] [2023-08-24 06:18:26,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:18:26,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:18:26,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 06:18:26,899 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 06:18:26,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 06:18:26,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886590213] [2023-08-24 06:18:26,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886590213] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 06:18:26,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 06:18:26,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-08-24 06:18:26,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001380799] [2023-08-24 06:18:26,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 06:18:26,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-24 06:18:26,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 06:18:26,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-24 06:18:26,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2023-08-24 06:18:26,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 404 [2023-08-24 06:18:26,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 1173 transitions, 23422 flow. Second operand has 14 states, 14 states have (on average 122.85714285714286) internal successors, (1720), 14 states have internal predecessors, (1720), 0 states have call successors, (0), 0 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 06:18:26,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 06:18:26,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 404 [2023-08-24 06:18:26,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 06:18:44,491 INFO L124 PetriNetUnfolderBase]: 57440/83243 cut-off events. [2023-08-24 06:18:44,491 INFO L125 PetriNetUnfolderBase]: For 716734/717025 co-relation queries the response was YES. [2023-08-24 06:18:45,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 388292 conditions, 83243 events. 57440/83243 cut-off events. For 716734/717025 co-relation queries the response was YES. Maximal size of possible extension queue 1274. Compared 541696 event pairs, 14593 based on Foata normal form. 548/79284 useless extension candidates. Maximal degree in co-relation 386715. Up to 61451 conditions per place. [2023-08-24 06:18:46,118 INFO L140 encePairwiseOnDemand]: 388/404 looper letters, 1142 selfloop transitions, 468 changer transitions 0/1611 dead transitions. [2023-08-24 06:18:46,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 1611 transitions, 30513 flow [2023-08-24 06:18:46,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-24 06:18:46,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-24 06:18:46,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2521 transitions. [2023-08-24 06:18:46,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34667216721672167 [2023-08-24 06:18:46,121 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2521 transitions. [2023-08-24 06:18:46,121 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2521 transitions. [2023-08-24 06:18:46,121 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 06:18:46,121 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2521 transitions. [2023-08-24 06:18:46,123 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 140.05555555555554) internal successors, (2521), 18 states have internal predecessors, (2521), 0 states have call successors, (0), 0 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 06:18:46,127 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 404.0) internal successors, (7676), 19 states have internal predecessors, (7676), 0 states have call successors, (0), 0 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 06:18:46,127 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 404.0) internal successors, (7676), 19 states have internal predecessors, (7676), 0 states have call successors, (0), 0 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 06:18:46,128 INFO L175 Difference]: Start difference. First operand has 318 places, 1173 transitions, 23422 flow. Second operand 18 states and 2521 transitions. [2023-08-24 06:18:46,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 1611 transitions, 30513 flow [2023-08-24 06:18:57,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 1611 transitions, 29899 flow, removed 123 selfloop flow, removed 6 redundant places. [2023-08-24 06:18:57,058 INFO L231 Difference]: Finished difference. Result has 335 places, 1207 transitions, 24616 flow [2023-08-24 06:18:57,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=22832, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=444, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=725, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=24616, PETRI_PLACES=335, PETRI_TRANSITIONS=1207} [2023-08-24 06:18:57,059 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 280 predicate places. [2023-08-24 06:18:57,059 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 1207 transitions, 24616 flow [2023-08-24 06:18:57,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 122.85714285714286) internal successors, (1720), 14 states have internal predecessors, (1720), 0 states have call successors, (0), 0 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 06:18:57,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:18:57,059 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 06:18:57,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-24 06:18:57,059 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION === [reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-08-24 06:18:57,059 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:18:57,060 INFO L85 PathProgramCache]: Analyzing trace with hash 198905401, now seen corresponding path program 1 times [2023-08-24 06:18:57,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:18:57,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153325264] [2023-08-24 06:18:57,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:18:57,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:18:57,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 06:18:57,682 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 06:18:57,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 06:18:57,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153325264] [2023-08-24 06:18:57,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153325264] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 06:18:57,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 06:18:57,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-08-24 06:18:57,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445161388] [2023-08-24 06:18:57,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 06:18:57,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-24 06:18:57,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 06:18:57,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-24 06:18:57,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2023-08-24 06:18:57,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 404 [2023-08-24 06:18:57,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 1207 transitions, 24616 flow. Second operand has 14 states, 14 states have (on average 122.85714285714286) internal successors, (1720), 14 states have internal predecessors, (1720), 0 states have call successors, (0), 0 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 06:18:57,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 06:18:57,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 404 [2023-08-24 06:18:57,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 06:19:17,137 INFO L124 PetriNetUnfolderBase]: 60803/88078 cut-off events. [2023-08-24 06:19:17,137 INFO L125 PetriNetUnfolderBase]: For 821300/821553 co-relation queries the response was YES. [2023-08-24 06:19:18,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 419338 conditions, 88078 events. 60803/88078 cut-off events. For 821300/821553 co-relation queries the response was YES. Maximal size of possible extension queue 1391. Compared 576913 event pairs, 18389 based on Foata normal form. 371/83554 useless extension candidates. Maximal degree in co-relation 417719. Up to 71809 conditions per place. [2023-08-24 06:19:19,298 INFO L140 encePairwiseOnDemand]: 388/404 looper letters, 1169 selfloop transitions, 397 changer transitions 0/1567 dead transitions. [2023-08-24 06:19:19,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 1567 transitions, 31020 flow [2023-08-24 06:19:19,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-24 06:19:19,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-24 06:19:19,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2374 transitions. [2023-08-24 06:19:19,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3456610366919045 [2023-08-24 06:19:19,300 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2374 transitions. [2023-08-24 06:19:19,300 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2374 transitions. [2023-08-24 06:19:19,301 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 06:19:19,301 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2374 transitions. [2023-08-24 06:19:19,303 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 139.64705882352942) internal successors, (2374), 17 states have internal predecessors, (2374), 0 states have call successors, (0), 0 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 06:19:19,306 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 404.0) internal successors, (7272), 18 states have internal predecessors, (7272), 0 states have call successors, (0), 0 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 06:19:19,306 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 404.0) internal successors, (7272), 18 states have internal predecessors, (7272), 0 states have call successors, (0), 0 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 06:19:19,306 INFO L175 Difference]: Start difference. First operand has 335 places, 1207 transitions, 24616 flow. Second operand 17 states and 2374 transitions. [2023-08-24 06:19:19,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 1567 transitions, 31020 flow [2023-08-24 06:19:32,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 1567 transitions, 29954 flow, removed 186 selfloop flow, removed 6 redundant places. [2023-08-24 06:19:32,875 INFO L231 Difference]: Finished difference. Result has 347 places, 1227 transitions, 24884 flow [2023-08-24 06:19:32,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=23503, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=385, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=820, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=24884, PETRI_PLACES=347, PETRI_TRANSITIONS=1227} [2023-08-24 06:19:32,876 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 292 predicate places. [2023-08-24 06:19:32,877 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 1227 transitions, 24884 flow [2023-08-24 06:19:32,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 122.85714285714286) internal successors, (1720), 14 states have internal predecessors, (1720), 0 states have call successors, (0), 0 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 06:19:32,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:19:32,877 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 06:19:32,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-24 06:19:32,877 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION === [reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-08-24 06:19:32,878 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:19:32,878 INFO L85 PathProgramCache]: Analyzing trace with hash 198905402, now seen corresponding path program 5 times [2023-08-24 06:19:32,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:19:32,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328461304] [2023-08-24 06:19:32,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:19:32,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:19:32,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 06:19:33,504 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 06:19:33,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 06:19:33,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328461304] [2023-08-24 06:19:33,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328461304] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 06:19:33,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 06:19:33,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-08-24 06:19:33,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288560858] [2023-08-24 06:19:33,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 06:19:33,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-24 06:19:33,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 06:19:33,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-24 06:19:33,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2023-08-24 06:19:33,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 404 [2023-08-24 06:19:33,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 1227 transitions, 24884 flow. Second operand has 14 states, 14 states have (on average 122.85714285714286) internal successors, (1720), 14 states have internal predecessors, (1720), 0 states have call successors, (0), 0 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 06:19:33,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 06:19:33,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 404 [2023-08-24 06:19:33,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand