/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.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-divine/ring_2w1r-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-28 01:26:04,316 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-28 01:26:04,317 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-28 01:26:04,345 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-28 01:26:04,345 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-28 01:26:04,347 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-28 01:26:04,349 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-28 01:26:04,351 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-28 01:26:04,352 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-28 01:26:04,355 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-28 01:26:04,356 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-28 01:26:04,357 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-28 01:26:04,357 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-28 01:26:04,359 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-28 01:26:04,359 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-28 01:26:04,360 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-28 01:26:04,361 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-28 01:26:04,361 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-28 01:26:04,363 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-28 01:26:04,366 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-28 01:26:04,367 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-28 01:26:04,368 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-28 01:26:04,368 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-28 01:26:04,369 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-28 01:26:04,375 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-01-28 01:26:04,375 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-01-28 01:26:04,375 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-01-28 01:26:04,376 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-01-28 01:26:04,376 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-01-28 01:26:04,377 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-01-28 01:26:04,377 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-28 01:26:04,377 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-28 01:26:04,378 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-28 01:26:04,378 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-28 01:26:04,379 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-28 01:26:04,379 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-28 01:26:04,379 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-28 01:26:04,379 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-28 01:26:04,379 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-28 01:26:04,380 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-28 01:26:04,380 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-28 01:26:04,381 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-01-28 01:26:04,401 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-28 01:26:04,401 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-28 01:26:04,402 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-28 01:26:04,402 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-28 01:26:04,402 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-28 01:26:04,403 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-28 01:26:04,403 INFO L138 SettingsManager]: * Use SBE=true [2023-01-28 01:26:04,403 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-28 01:26:04,403 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-28 01:26:04,403 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-28 01:26:04,403 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-28 01:26:04,403 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-28 01:26:04,404 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-28 01:26:04,404 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-28 01:26:04,404 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-28 01:26:04,404 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-28 01:26:04,404 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-28 01:26:04,404 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-28 01:26:04,404 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-28 01:26:04,404 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-28 01:26:04,404 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-28 01:26:04,404 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-28 01:26:04,404 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-28 01:26:04,404 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 01:26:04,405 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-28 01:26:04,405 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-28 01:26:04,405 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-28 01:26:04,405 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-28 01:26:04,405 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-28 01:26:04,405 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-28 01:26:04,405 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-28 01:26:04,405 INFO L138 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-01-28 01:26:04,577 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-28 01:26:04,592 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-28 01:26:04,594 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-28 01:26:04,594 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-28 01:26:04,595 INFO L275 PluginConnector]: CDTParser initialized [2023-01-28 01:26:04,596 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-divine/ring_2w1r-1.i [2023-01-28 01:26:05,539 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-28 01:26:05,774 INFO L351 CDTParser]: Found 1 translation units. [2023-01-28 01:26:05,774 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-divine/ring_2w1r-1.i [2023-01-28 01:26:05,785 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc802fca4/c9909f23a0944ffeb2438ecd4ef39077/FLAGb53607f5c [2023-01-28 01:26:05,793 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc802fca4/c9909f23a0944ffeb2438ecd4ef39077 [2023-01-28 01:26:05,795 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-28 01:26:05,796 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-28 01:26:05,796 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-28 01:26:05,797 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-28 01:26:05,798 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-28 01:26:05,799 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 01:26:05" (1/1) ... [2023-01-28 01:26:05,800 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1dce129d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 01:26:05, skipping insertion in model container [2023-01-28 01:26:05,800 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 01:26:05" (1/1) ... [2023-01-28 01:26:05,804 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-28 01:26:05,845 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-28 01:26:05,949 WARN L633 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-01-28 01:26:06,131 WARN L247 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] [2023-01-28 01:26:06,135 WARN L247 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] [2023-01-28 01:26:06,136 WARN L247 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] [2023-01-28 01:26:06,192 WARN L247 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] [2023-01-28 01:26:06,193 WARN L247 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] [2023-01-28 01:26:06,195 WARN L247 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] [2023-01-28 01:26:06,196 WARN L247 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] [2023-01-28 01:26:06,202 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 01:26:06,209 INFO L203 MainTranslator]: Completed pre-run [2023-01-28 01:26:06,222 WARN L633 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-01-28 01:26:06,240 WARN L247 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] [2023-01-28 01:26:06,241 WARN L247 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] [2023-01-28 01:26:06,241 WARN L247 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] [2023-01-28 01:26:06,255 WARN L247 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] [2023-01-28 01:26:06,258 WARN L247 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] [2023-01-28 01:26:06,259 WARN L247 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] [2023-01-28 01:26:06,259 WARN L247 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] [2023-01-28 01:26:06,262 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 01:26:06,311 WARN L667 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-01-28 01:26:06,316 INFO L208 MainTranslator]: Completed translation [2023-01-28 01:26:06,317 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 01:26:06 WrapperNode [2023-01-28 01:26:06,317 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-28 01:26:06,318 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-28 01:26:06,318 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-28 01:26:06,318 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-28 01:26:06,324 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 01:26:06" (1/1) ... [2023-01-28 01:26:06,352 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 01:26:06" (1/1) ... [2023-01-28 01:26:06,380 INFO L138 Inliner]: procedures = 310, calls = 70, calls flagged for inlining = 10, calls inlined = 8, statements flattened = 203 [2023-01-28 01:26:06,380 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-28 01:26:06,381 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-28 01:26:06,381 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-28 01:26:06,382 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-28 01:26:06,390 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 01:26:06" (1/1) ... [2023-01-28 01:26:06,391 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 01:26:06" (1/1) ... [2023-01-28 01:26:06,399 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 01:26:06" (1/1) ... [2023-01-28 01:26:06,399 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 01:26:06" (1/1) ... [2023-01-28 01:26:06,404 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 01:26:06" (1/1) ... [2023-01-28 01:26:06,414 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 01:26:06" (1/1) ... [2023-01-28 01:26:06,415 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 01:26:06" (1/1) ... [2023-01-28 01:26:06,416 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 01:26:06" (1/1) ... [2023-01-28 01:26:06,418 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-28 01:26:06,419 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-28 01:26:06,419 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-28 01:26:06,419 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-28 01:26:06,420 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 01:26:06" (1/1) ... [2023-01-28 01:26:06,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 01:26:06,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 01:26:06,444 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) [2023-01-28 01:26:06,445 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 [2023-01-28 01:26:06,473 INFO L130 BoogieDeclarations]: Found specification of procedure reader_two [2023-01-28 01:26:06,473 INFO L138 BoogieDeclarations]: Found implementation of procedure reader_two [2023-01-28 01:26:06,474 INFO L130 BoogieDeclarations]: Found specification of procedure writer_fn [2023-01-28 01:26:06,474 INFO L138 BoogieDeclarations]: Found implementation of procedure writer_fn [2023-01-28 01:26:06,474 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-28 01:26:06,474 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-28 01:26:06,474 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-28 01:26:06,474 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-28 01:26:06,474 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-01-28 01:26:06,474 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-28 01:26:06,474 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-28 01:26:06,474 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-28 01:26:06,475 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-28 01:26:06,476 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-01-28 01:26:06,648 INFO L236 CfgBuilder]: Building ICFG [2023-01-28 01:26:06,649 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-28 01:26:06,907 INFO L277 CfgBuilder]: Performing block encoding [2023-01-28 01:26:06,915 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-28 01:26:06,916 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-01-28 01:26:06,917 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 01:26:06 BoogieIcfgContainer [2023-01-28 01:26:06,917 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-28 01:26:06,918 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-28 01:26:06,918 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-28 01:26:06,920 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-28 01:26:06,920 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.01 01:26:05" (1/3) ... [2023-01-28 01:26:06,921 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50ec5e7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 01:26:06, skipping insertion in model container [2023-01-28 01:26:06,921 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 01:26:06" (2/3) ... [2023-01-28 01:26:06,921 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50ec5e7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 01:26:06, skipping insertion in model container [2023-01-28 01:26:06,921 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 01:26:06" (3/3) ... [2023-01-28 01:26:06,922 INFO L112 eAbstractionObserver]: Analyzing ICFG ring_2w1r-1.i [2023-01-28 01:26:06,933 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-28 01:26:06,934 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2023-01-28 01:26:06,934 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-28 01:26:07,020 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-28 01:26:07,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 207 places, 217 transitions, 450 flow [2023-01-28 01:26:07,108 INFO L130 PetriNetUnfolder]: 17/215 cut-off events. [2023-01-28 01:26:07,109 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 01:26:07,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 224 conditions, 215 events. 17/215 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 447 event pairs, 0 based on Foata normal form. 0/194 useless extension candidates. Maximal degree in co-relation 169. Up to 2 conditions per place. [2023-01-28 01:26:07,123 INFO L82 GeneralOperation]: Start removeDead. Operand has 207 places, 217 transitions, 450 flow [2023-01-28 01:26:07,127 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 195 places, 205 transitions, 419 flow [2023-01-28 01:26:07,129 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 01:26:07,134 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 195 places, 205 transitions, 419 flow [2023-01-28 01:26:07,141 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 195 places, 205 transitions, 419 flow [2023-01-28 01:26:07,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 195 places, 205 transitions, 419 flow [2023-01-28 01:26:07,190 INFO L130 PetriNetUnfolder]: 17/205 cut-off events. [2023-01-28 01:26:07,191 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-28 01:26:07,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213 conditions, 205 events. 17/205 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 405 event pairs, 0 based on Foata normal form. 0/184 useless extension candidates. Maximal degree in co-relation 169. Up to 2 conditions per place. [2023-01-28 01:26:07,199 INFO L119 LiptonReduction]: Number of co-enabled transitions 16824 [2023-01-28 01:26:11,313 INFO L134 LiptonReduction]: Checked pairs total: 29990 [2023-01-28 01:26:11,313 INFO L136 LiptonReduction]: Total number of compositions: 183 [2023-01-28 01:26:11,323 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 01:26:11,326 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;@2572be6f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 01:26:11,326 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2023-01-28 01:26:11,340 INFO L130 PetriNetUnfolder]: 8/49 cut-off events. [2023-01-28 01:26:11,340 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-28 01:26:11,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:26:11,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 01:26:11,341 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION === [reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-01-28 01:26:11,347 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:26:11,347 INFO L85 PathProgramCache]: Analyzing trace with hash 450394825, now seen corresponding path program 1 times [2023-01-28 01:26:11,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:26:11,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844045141] [2023-01-28 01:26:11,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:26:11,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:26:11,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:26:12,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 01:26:12,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 01:26:12,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844045141] [2023-01-28 01:26:12,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844045141] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 01:26:12,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 01:26:12,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 01:26:12,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700100473] [2023-01-28 01:26:12,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 01:26:12,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-28 01:26:12,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 01:26:12,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-28 01:26:12,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-01-28 01:26:12,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 400 [2023-01-28 01:26:12,152 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 59 transitions, 127 flow. Second operand has 6 states, 6 states have (on average 141.66666666666666) internal successors, (850), 6 states have internal predecessors, (850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:26:12,152 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 01:26:12,152 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 400 [2023-01-28 01:26:12,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 01:26:12,825 INFO L130 PetriNetUnfolder]: 5862/8420 cut-off events. [2023-01-28 01:26:12,825 INFO L131 PetriNetUnfolder]: For 28/28 co-relation queries the response was YES. [2023-01-28 01:26:12,830 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 38129 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. [2023-01-28 01:26:12,853 INFO L137 encePairwiseOnDemand]: 389/400 looper letters, 54 selfloop transitions, 8 changer transitions 5/68 dead transitions. [2023-01-28 01:26:12,853 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 68 transitions, 279 flow [2023-01-28 01:26:12,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 01:26:12,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 01:26:12,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 907 transitions. [2023-01-28 01:26:12,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3779166666666667 [2023-01-28 01:26:12,867 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 907 transitions. [2023-01-28 01:26:12,868 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 907 transitions. [2023-01-28 01:26:12,870 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 01:26:12,872 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 907 transitions. [2023-01-28 01:26:12,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 151.16666666666666) internal successors, (907), 6 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:26:12,882 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 400.0) internal successors, (2800), 7 states have internal predecessors, (2800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:26:12,883 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 400.0) internal successors, (2800), 7 states have internal predecessors, (2800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:26:12,884 INFO L175 Difference]: Start difference. First operand has 55 places, 59 transitions, 127 flow. Second operand 6 states and 907 transitions. [2023-01-28 01:26:12,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 68 transitions, 279 flow [2023-01-28 01:26:12,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 68 transitions, 274 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-01-28 01:26:12,890 INFO L231 Difference]: Finished difference. Result has 60 places, 56 transitions, 149 flow [2023-01-28 01:26:12,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, 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} [2023-01-28 01:26:12,893 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 5 predicate places. [2023-01-28 01:26:12,893 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 56 transitions, 149 flow [2023-01-28 01:26:12,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 141.66666666666666) internal successors, (850), 6 states have internal predecessors, (850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:26:12,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:26:12,894 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 01:26:12,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-28 01:26:12,894 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION === [reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-01-28 01:26:12,894 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:26:12,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1357457834, now seen corresponding path program 1 times [2023-01-28 01:26:12,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:26:12,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633763761] [2023-01-28 01:26:12,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:26:12,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:26:12,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:26:13,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 01:26:13,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 01:26:13,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633763761] [2023-01-28 01:26:13,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633763761] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 01:26:13,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 01:26:13,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-01-28 01:26:13,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418056953] [2023-01-28 01:26:13,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 01:26:13,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 01:26:13,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 01:26:13,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 01:26:13,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-01-28 01:26:13,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 400 [2023-01-28 01:26:13,343 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 56 transitions, 149 flow. Second operand has 7 states, 7 states have (on average 138.42857142857142) internal successors, (969), 7 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:26:13,344 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 01:26:13,344 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 400 [2023-01-28 01:26:13,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 01:26:14,053 INFO L130 PetriNetUnfolder]: 7142/10261 cut-off events. [2023-01-28 01:26:14,053 INFO L131 PetriNetUnfolder]: For 457/457 co-relation queries the response was YES. [2023-01-28 01:26:14,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21339 conditions, 10261 events. 7142/10261 cut-off events. For 457/457 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 47912 event pairs, 1921 based on Foata normal form. 0/8149 useless extension candidates. Maximal degree in co-relation 20207. Up to 7938 conditions per place. [2023-01-28 01:26:14,093 INFO L137 encePairwiseOnDemand]: 388/400 looper letters, 106 selfloop transitions, 18 changer transitions 0/125 dead transitions. [2023-01-28 01:26:14,093 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 125 transitions, 551 flow [2023-01-28 01:26:14,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 01:26:14,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 01:26:14,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 938 transitions. [2023-01-28 01:26:14,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3908333333333333 [2023-01-28 01:26:14,095 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 938 transitions. [2023-01-28 01:26:14,095 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 938 transitions. [2023-01-28 01:26:14,096 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 01:26:14,096 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 938 transitions. [2023-01-28 01:26:14,097 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 156.33333333333334) internal successors, (938), 6 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:26:14,100 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 400.0) internal successors, (2800), 7 states have internal predecessors, (2800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:26:14,101 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 400.0) internal successors, (2800), 7 states have internal predecessors, (2800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:26:14,101 INFO L175 Difference]: Start difference. First operand has 60 places, 56 transitions, 149 flow. Second operand 6 states and 938 transitions. [2023-01-28 01:26:14,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 125 transitions, 551 flow [2023-01-28 01:26:14,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 125 transitions, 541 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-01-28 01:26:14,111 INFO L231 Difference]: Finished difference. Result has 61 places, 68 transitions, 247 flow [2023-01-28 01:26:14,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, 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} [2023-01-28 01:26:14,112 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 6 predicate places. [2023-01-28 01:26:14,112 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 68 transitions, 247 flow [2023-01-28 01:26:14,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 138.42857142857142) internal successors, (969), 7 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:26:14,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:26:14,113 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 01:26:14,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-28 01:26:14,113 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)] === [2023-01-28 01:26:14,115 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:26:14,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1513644026, now seen corresponding path program 2 times [2023-01-28 01:26:14,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:26:14,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414198205] [2023-01-28 01:26:14,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:26:14,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:26:14,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:26:14,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 01:26:14,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 01:26:14,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414198205] [2023-01-28 01:26:14,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414198205] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 01:26:14,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 01:26:14,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-01-28 01:26:14,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22580390] [2023-01-28 01:26:14,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 01:26:14,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 01:26:14,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 01:26:14,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 01:26:14,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-01-28 01:26:14,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 400 [2023-01-28 01:26:14,529 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 68 transitions, 247 flow. Second operand has 7 states, 7 states have (on average 138.42857142857142) internal successors, (969), 7 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:26:14,529 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 01:26:14,529 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 400 [2023-01-28 01:26:14,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 01:26:15,243 INFO L130 PetriNetUnfolder]: 6466/9355 cut-off events. [2023-01-28 01:26:15,243 INFO L131 PetriNetUnfolder]: For 2017/2047 co-relation queries the response was YES. [2023-01-28 01:26:15,251 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 42627 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. [2023-01-28 01:26:15,272 INFO L137 encePairwiseOnDemand]: 392/400 looper letters, 101 selfloop transitions, 17 changer transitions 0/119 dead transitions. [2023-01-28 01:26:15,272 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 119 transitions, 590 flow [2023-01-28 01:26:15,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 01:26:15,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 01:26:15,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 929 transitions. [2023-01-28 01:26:15,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38708333333333333 [2023-01-28 01:26:15,274 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 929 transitions. [2023-01-28 01:26:15,274 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 929 transitions. [2023-01-28 01:26:15,275 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 01:26:15,275 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 929 transitions. [2023-01-28 01:26:15,276 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 154.83333333333334) internal successors, (929), 6 states have internal predecessors, (929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:26:15,279 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 400.0) internal successors, (2800), 7 states have internal predecessors, (2800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:26:15,280 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 400.0) internal successors, (2800), 7 states have internal predecessors, (2800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:26:15,280 INFO L175 Difference]: Start difference. First operand has 61 places, 68 transitions, 247 flow. Second operand 6 states and 929 transitions. [2023-01-28 01:26:15,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 119 transitions, 590 flow [2023-01-28 01:26:15,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 119 transitions, 572 flow, removed 8 selfloop flow, removed 1 redundant places. [2023-01-28 01:26:15,304 INFO L231 Difference]: Finished difference. Result has 66 places, 68 transitions, 277 flow [2023-01-28 01:26:15,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, 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} [2023-01-28 01:26:15,304 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 11 predicate places. [2023-01-28 01:26:15,304 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 68 transitions, 277 flow [2023-01-28 01:26:15,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 138.42857142857142) internal successors, (969), 7 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:26:15,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:26:15,305 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] [2023-01-28 01:26:15,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-28 01:26:15,305 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)] === [2023-01-28 01:26:15,306 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:26:15,306 INFO L85 PathProgramCache]: Analyzing trace with hash -52548506, now seen corresponding path program 1 times [2023-01-28 01:26:15,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:26:15,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203158222] [2023-01-28 01:26:15,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:26:15,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:26:15,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:26:16,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 01:26:16,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 01:26:16,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203158222] [2023-01-28 01:26:16,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203158222] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 01:26:16,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 01:26:16,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-01-28 01:26:16,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085609540] [2023-01-28 01:26:16,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 01:26:16,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-28 01:26:16,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 01:26:16,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-28 01:26:16,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2023-01-28 01:26:16,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 400 [2023-01-28 01:26:16,043 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 68 transitions, 277 flow. Second operand has 13 states, 13 states have (on average 127.84615384615384) internal successors, (1662), 13 states have internal predecessors, (1662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:26:16,043 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 01:26:16,043 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 400 [2023-01-28 01:26:16,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 01:26:18,303 INFO L130 PetriNetUnfolder]: 8481/12290 cut-off events. [2023-01-28 01:26:18,303 INFO L131 PetriNetUnfolder]: For 5821/5823 co-relation queries the response was YES. [2023-01-28 01:26:18,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28912 conditions, 12290 events. 8481/12290 cut-off events. For 5821/5823 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 61112 event pairs, 745 based on Foata normal form. 2/10156 useless extension candidates. Maximal degree in co-relation 25549. Up to 7920 conditions per place. [2023-01-28 01:26:18,346 INFO L137 encePairwiseOnDemand]: 381/400 looper letters, 290 selfloop transitions, 94 changer transitions 0/385 dead transitions. [2023-01-28 01:26:18,346 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 385 transitions, 2164 flow [2023-01-28 01:26:18,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-01-28 01:26:18,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-01-28 01:26:18,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3251 transitions. [2023-01-28 01:26:18,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3533695652173913 [2023-01-28 01:26:18,352 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3251 transitions. [2023-01-28 01:26:18,352 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3251 transitions. [2023-01-28 01:26:18,354 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 01:26:18,354 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3251 transitions. [2023-01-28 01:26:18,358 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 141.34782608695653) internal successors, (3251), 23 states have internal predecessors, (3251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:26:18,365 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 400.0) internal successors, (9600), 24 states have internal predecessors, (9600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:26:18,366 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 400.0) internal successors, (9600), 24 states have internal predecessors, (9600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:26:18,366 INFO L175 Difference]: Start difference. First operand has 66 places, 68 transitions, 277 flow. Second operand 23 states and 3251 transitions. [2023-01-28 01:26:18,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 385 transitions, 2164 flow [2023-01-28 01:26:18,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 385 transitions, 2097 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-01-28 01:26:18,381 INFO L231 Difference]: Finished difference. Result has 91 places, 155 transitions, 1141 flow [2023-01-28 01:26:18,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, 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=23, PETRI_FLOW=1141, PETRI_PLACES=91, PETRI_TRANSITIONS=155} [2023-01-28 01:26:18,382 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 36 predicate places. [2023-01-28 01:26:18,382 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 155 transitions, 1141 flow [2023-01-28 01:26:18,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 127.84615384615384) internal successors, (1662), 13 states have internal predecessors, (1662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:26:18,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:26:18,383 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] [2023-01-28 01:26:18,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-01-28 01:26:18,383 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)] === [2023-01-28 01:26:18,383 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:26:18,383 INFO L85 PathProgramCache]: Analyzing trace with hash 2058476084, now seen corresponding path program 2 times [2023-01-28 01:26:18,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:26:18,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986721678] [2023-01-28 01:26:18,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:26:18,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:26:18,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:26:18,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 01:26:18,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 01:26:18,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986721678] [2023-01-28 01:26:18,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986721678] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 01:26:18,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 01:26:18,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-01-28 01:26:18,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476290164] [2023-01-28 01:26:18,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 01:26:18,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-28 01:26:18,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 01:26:18,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-28 01:26:18,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2023-01-28 01:26:18,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 400 [2023-01-28 01:26:18,995 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 155 transitions, 1141 flow. Second operand has 13 states, 13 states have (on average 127.84615384615384) internal successors, (1662), 13 states have internal predecessors, (1662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:26:18,995 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 01:26:18,995 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 400 [2023-01-28 01:26:18,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 01:26:20,966 INFO L130 PetriNetUnfolder]: 9563/13946 cut-off events. [2023-01-28 01:26:20,966 INFO L131 PetriNetUnfolder]: For 12107/12153 co-relation queries the response was YES. [2023-01-28 01:26:20,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38455 conditions, 13946 events. 9563/13946 cut-off events. For 12107/12153 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 70545 event pairs, 1563 based on Foata normal form. 46/12362 useless extension candidates. Maximal degree in co-relation 36476. Up to 8513 conditions per place. [2023-01-28 01:26:21,024 INFO L137 encePairwiseOnDemand]: 386/400 looper letters, 216 selfloop transitions, 137 changer transitions 0/354 dead transitions. [2023-01-28 01:26:21,025 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 354 transitions, 2571 flow [2023-01-28 01:26:21,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-01-28 01:26:21,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-01-28 01:26:21,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2269 transitions. [2023-01-28 01:26:21,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35453125 [2023-01-28 01:26:21,031 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2269 transitions. [2023-01-28 01:26:21,031 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2269 transitions. [2023-01-28 01:26:21,032 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 01:26:21,032 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2269 transitions. [2023-01-28 01:26:21,035 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 141.8125) internal successors, (2269), 16 states have internal predecessors, (2269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:26:21,042 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 400.0) internal successors, (6800), 17 states have internal predecessors, (6800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:26:21,043 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 400.0) internal successors, (6800), 17 states have internal predecessors, (6800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:26:21,043 INFO L175 Difference]: Start difference. First operand has 91 places, 155 transitions, 1141 flow. Second operand 16 states and 2269 transitions. [2023-01-28 01:26:21,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 354 transitions, 2571 flow [2023-01-28 01:26:21,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 354 transitions, 2485 flow, removed 42 selfloop flow, removed 1 redundant places. [2023-01-28 01:26:21,183 INFO L231 Difference]: Finished difference. Result has 113 places, 209 transitions, 1924 flow [2023-01-28 01:26:21,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=1060, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1924, PETRI_PLACES=113, PETRI_TRANSITIONS=209} [2023-01-28 01:26:21,184 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 58 predicate places. [2023-01-28 01:26:21,185 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 209 transitions, 1924 flow [2023-01-28 01:26:21,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 127.84615384615384) internal successors, (1662), 13 states have internal predecessors, (1662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:26:21,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:26:21,185 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] [2023-01-28 01:26:21,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-01-28 01:26:21,186 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)] === [2023-01-28 01:26:21,186 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:26:21,186 INFO L85 PathProgramCache]: Analyzing trace with hash -2036158078, now seen corresponding path program 1 times [2023-01-28 01:26:21,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:26:21,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281887101] [2023-01-28 01:26:21,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:26:21,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:26:21,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:26:21,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 01:26:21,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 01:26:21,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281887101] [2023-01-28 01:26:21,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281887101] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 01:26:21,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 01:26:21,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-01-28 01:26:21,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059671435] [2023-01-28 01:26:21,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 01:26:21,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-28 01:26:21,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 01:26:21,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-28 01:26:21,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-01-28 01:26:21,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 400 [2023-01-28 01:26:21,823 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 209 transitions, 1924 flow. Second operand has 12 states, 12 states have (on average 128.0) internal successors, (1536), 12 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:26:21,823 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 01:26:21,823 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 400 [2023-01-28 01:26:21,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 01:26:23,823 INFO L130 PetriNetUnfolder]: 10665/15668 cut-off events. [2023-01-28 01:26:23,823 INFO L131 PetriNetUnfolder]: For 27084/27111 co-relation queries the response was YES. [2023-01-28 01:26:23,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47642 conditions, 15668 events. 10665/15668 cut-off events. For 27084/27111 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 83108 event pairs, 1646 based on Foata normal form. 11/14114 useless extension candidates. Maximal degree in co-relation 46861. Up to 9430 conditions per place. [2023-01-28 01:26:23,883 INFO L137 encePairwiseOnDemand]: 385/400 looper letters, 289 selfloop transitions, 317 changer transitions 0/607 dead transitions. [2023-01-28 01:26:23,884 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 607 transitions, 6810 flow [2023-01-28 01:26:23,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-28 01:26:23,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-28 01:26:23,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1986 transitions. [2023-01-28 01:26:23,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35464285714285715 [2023-01-28 01:26:23,889 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1986 transitions. [2023-01-28 01:26:23,889 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1986 transitions. [2023-01-28 01:26:23,889 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 01:26:23,889 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1986 transitions. [2023-01-28 01:26:23,892 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 141.85714285714286) internal successors, (1986), 14 states have internal predecessors, (1986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:26:23,897 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 400.0) internal successors, (6000), 15 states have internal predecessors, (6000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:26:23,898 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 400.0) internal successors, (6000), 15 states have internal predecessors, (6000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:26:23,898 INFO L175 Difference]: Start difference. First operand has 113 places, 209 transitions, 1924 flow. Second operand 14 states and 1986 transitions. [2023-01-28 01:26:23,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 607 transitions, 6810 flow [2023-01-28 01:26:24,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 607 transitions, 6794 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-01-28 01:26:24,056 INFO L231 Difference]: Finished difference. Result has 132 places, 421 transitions, 5686 flow [2023-01-28 01:26:24,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=1908, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=5686, PETRI_PLACES=132, PETRI_TRANSITIONS=421} [2023-01-28 01:26:24,057 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 77 predicate places. [2023-01-28 01:26:24,057 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 421 transitions, 5686 flow [2023-01-28 01:26:24,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 128.0) internal successors, (1536), 12 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:26:24,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:26:24,058 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] [2023-01-28 01:26:24,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-01-28 01:26:24,058 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)] === [2023-01-28 01:26:24,058 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:26:24,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1553150430, now seen corresponding path program 2 times [2023-01-28 01:26:24,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:26:24,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699185402] [2023-01-28 01:26:24,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:26:24,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:26:24,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:26:24,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 01:26:24,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 01:26:24,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699185402] [2023-01-28 01:26:24,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699185402] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 01:26:24,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 01:26:24,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-01-28 01:26:24,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197196972] [2023-01-28 01:26:24,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 01:26:24,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-28 01:26:24,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 01:26:24,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-28 01:26:24,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2023-01-28 01:26:24,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 400 [2023-01-28 01:26:24,735 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 421 transitions, 5686 flow. Second operand has 12 states, 12 states have (on average 128.0) internal successors, (1536), 12 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:26:24,735 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 01:26:24,735 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 400 [2023-01-28 01:26:24,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 01:26:27,883 INFO L130 PetriNetUnfolder]: 11348/16725 cut-off events. [2023-01-28 01:26:27,883 INFO L131 PetriNetUnfolder]: For 42309/42353 co-relation queries the response was YES. [2023-01-28 01:26:27,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61410 conditions, 16725 events. 11348/16725 cut-off events. For 42309/42353 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 89773 event pairs, 1633 based on Foata normal form. 36/15875 useless extension candidates. Maximal degree in co-relation 60431. Up to 9545 conditions per place. [2023-01-28 01:26:27,971 INFO L137 encePairwiseOnDemand]: 384/400 looper letters, 433 selfloop transitions, 393 changer transitions 0/827 dead transitions. [2023-01-28 01:26:27,971 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 827 transitions, 10672 flow [2023-01-28 01:26:27,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-01-28 01:26:27,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-01-28 01:26:27,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2833 transitions. [2023-01-28 01:26:27,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.354125 [2023-01-28 01:26:27,979 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2833 transitions. [2023-01-28 01:26:27,979 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2833 transitions. [2023-01-28 01:26:27,981 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 01:26:27,981 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2833 transitions. [2023-01-28 01:26:27,986 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 141.65) internal successors, (2833), 20 states have internal predecessors, (2833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:26:27,995 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 400.0) internal successors, (8400), 21 states have internal predecessors, (8400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:26:27,996 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 400.0) internal successors, (8400), 21 states have internal predecessors, (8400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:26:27,997 INFO L175 Difference]: Start difference. First operand has 132 places, 421 transitions, 5686 flow. Second operand 20 states and 2833 transitions. [2023-01-28 01:26:27,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 827 transitions, 10672 flow [2023-01-28 01:26:28,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 827 transitions, 10632 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-01-28 01:26:28,451 INFO L231 Difference]: Finished difference. Result has 156 places, 575 transitions, 8873 flow [2023-01-28 01:26:28,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=5670, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=245, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=8873, PETRI_PLACES=156, PETRI_TRANSITIONS=575} [2023-01-28 01:26:28,451 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 101 predicate places. [2023-01-28 01:26:28,452 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 575 transitions, 8873 flow [2023-01-28 01:26:28,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 128.0) internal successors, (1536), 12 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:26:28,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:26:28,452 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] [2023-01-28 01:26:28,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-01-28 01:26:28,453 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)] === [2023-01-28 01:26:28,453 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:26:28,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1767103903, now seen corresponding path program 1 times [2023-01-28 01:26:28,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:26:28,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766698446] [2023-01-28 01:26:28,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:26:28,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:26:28,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:26:29,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 01:26:29,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 01:26:29,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766698446] [2023-01-28 01:26:29,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766698446] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 01:26:29,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 01:26:29,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-01-28 01:26:29,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19817761] [2023-01-28 01:26:29,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 01:26:29,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-28 01:26:29,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 01:26:29,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-28 01:26:29,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2023-01-28 01:26:29,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 400 [2023-01-28 01:26:29,130 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 575 transitions, 8873 flow. Second operand has 15 states, 15 states have (on average 120.73333333333333) internal successors, (1811), 15 states have internal predecessors, (1811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:26:29,130 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 01:26:29,130 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 400 [2023-01-28 01:26:29,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 01:26:32,871 INFO L130 PetriNetUnfolder]: 15110/22106 cut-off events. [2023-01-28 01:26:32,871 INFO L131 PetriNetUnfolder]: For 76772/76840 co-relation queries the response was YES. [2023-01-28 01:26:32,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88285 conditions, 22106 events. 15110/22106 cut-off events. For 76772/76840 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 119188 event pairs, 2813 based on Foata normal form. 155/21258 useless extension candidates. Maximal degree in co-relation 87330. Up to 10277 conditions per place. [2023-01-28 01:26:33,019 INFO L137 encePairwiseOnDemand]: 383/400 looper letters, 655 selfloop transitions, 212 changer transitions 0/868 dead transitions. [2023-01-28 01:26:33,019 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 868 transitions, 12347 flow [2023-01-28 01:26:33,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-01-28 01:26:33,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-01-28 01:26:33,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2478 transitions. [2023-01-28 01:26:33,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3441666666666667 [2023-01-28 01:26:33,025 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2478 transitions. [2023-01-28 01:26:33,025 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2478 transitions. [2023-01-28 01:26:33,026 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 01:26:33,026 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2478 transitions. [2023-01-28 01:26:33,031 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 137.66666666666666) internal successors, (2478), 18 states have internal predecessors, (2478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:26:33,037 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 400.0) internal successors, (7600), 19 states have internal predecessors, (7600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:26:33,038 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 400.0) internal successors, (7600), 19 states have internal predecessors, (7600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:26:33,038 INFO L175 Difference]: Start difference. First operand has 156 places, 575 transitions, 8873 flow. Second operand 18 states and 2478 transitions. [2023-01-28 01:26:33,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 868 transitions, 12347 flow [2023-01-28 01:26:34,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 868 transitions, 12279 flow, removed 33 selfloop flow, removed 1 redundant places. [2023-01-28 01:26:34,284 INFO L231 Difference]: Finished difference. Result has 176 places, 597 transitions, 9429 flow [2023-01-28 01:26:34,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=8847, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=9429, PETRI_PLACES=176, PETRI_TRANSITIONS=597} [2023-01-28 01:26:34,286 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 121 predicate places. [2023-01-28 01:26:34,286 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 597 transitions, 9429 flow [2023-01-28 01:26:34,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 120.73333333333333) internal successors, (1811), 15 states have internal predecessors, (1811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:26:34,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:26:34,287 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] [2023-01-28 01:26:34,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-01-28 01:26:34,287 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)] === [2023-01-28 01:26:34,288 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:26:34,288 INFO L85 PathProgramCache]: Analyzing trace with hash 410730475, now seen corresponding path program 1 times [2023-01-28 01:26:34,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:26:34,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290946553] [2023-01-28 01:26:34,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:26:34,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:26:34,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:26:34,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 01:26:34,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 01:26:34,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290946553] [2023-01-28 01:26:34,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290946553] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 01:26:34,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 01:26:34,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-01-28 01:26:34,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899217329] [2023-01-28 01:26:34,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 01:26:34,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-01-28 01:26:34,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 01:26:34,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-01-28 01:26:34,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2023-01-28 01:26:34,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 400 [2023-01-28 01:26:34,892 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 597 transitions, 9429 flow. Second operand has 14 states, 14 states have (on average 120.85714285714286) internal successors, (1692), 14 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:26:34,892 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 01:26:34,892 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 400 [2023-01-28 01:26:34,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 01:26:39,217 INFO L130 PetriNetUnfolder]: 18764/27320 cut-off events. [2023-01-28 01:26:39,217 INFO L131 PetriNetUnfolder]: For 92403/92507 co-relation queries the response was YES. [2023-01-28 01:26:39,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110162 conditions, 27320 events. 18764/27320 cut-off events. For 92403/92507 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 150657 event pairs, 3503 based on Foata normal form. 405/26412 useless extension candidates. Maximal degree in co-relation 109257. Up to 15889 conditions per place. [2023-01-28 01:26:39,383 INFO L137 encePairwiseOnDemand]: 383/400 looper letters, 678 selfloop transitions, 212 changer transitions 0/891 dead transitions. [2023-01-28 01:26:39,383 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 891 transitions, 13007 flow [2023-01-28 01:26:39,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-28 01:26:39,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-28 01:26:39,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2342 transitions. [2023-01-28 01:26:39,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34441176470588236 [2023-01-28 01:26:39,386 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2342 transitions. [2023-01-28 01:26:39,386 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2342 transitions. [2023-01-28 01:26:39,387 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 01:26:39,387 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2342 transitions. [2023-01-28 01:26:39,389 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 137.76470588235293) internal successors, (2342), 17 states have internal predecessors, (2342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:26:39,393 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 400.0) internal successors, (7200), 18 states have internal predecessors, (7200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:26:39,394 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 400.0) internal successors, (7200), 18 states have internal predecessors, (7200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:26:39,394 INFO L175 Difference]: Start difference. First operand has 176 places, 597 transitions, 9429 flow. Second operand 17 states and 2342 transitions. [2023-01-28 01:26:39,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 891 transitions, 13007 flow [2023-01-28 01:26:40,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 891 transitions, 12649 flow, removed 21 selfloop flow, removed 7 redundant places. [2023-01-28 01:26:40,381 INFO L231 Difference]: Finished difference. Result has 189 places, 619 transitions, 9793 flow [2023-01-28 01:26:40,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=9167, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=9793, PETRI_PLACES=189, PETRI_TRANSITIONS=619} [2023-01-28 01:26:40,382 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 134 predicate places. [2023-01-28 01:26:40,382 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 619 transitions, 9793 flow [2023-01-28 01:26:40,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 120.85714285714286) internal successors, (1692), 14 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:26:40,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:26:40,383 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] [2023-01-28 01:26:40,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-01-28 01:26:40,383 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)] === [2023-01-28 01:26:40,383 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:26:40,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1450695237, now seen corresponding path program 2 times [2023-01-28 01:26:40,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:26:40,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66411459] [2023-01-28 01:26:40,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:26:40,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:26:40,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:26:41,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 01:26:41,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 01:26:41,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66411459] [2023-01-28 01:26:41,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66411459] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 01:26:41,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 01:26:41,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-01-28 01:26:41,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792649569] [2023-01-28 01:26:41,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 01:26:41,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-01-28 01:26:41,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 01:26:41,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-01-28 01:26:41,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2023-01-28 01:26:41,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 400 [2023-01-28 01:26:41,135 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 619 transitions, 9793 flow. Second operand has 14 states, 14 states have (on average 120.85714285714286) internal successors, (1692), 14 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:26:41,135 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 01:26:41,135 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 400 [2023-01-28 01:26:41,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 01:26:47,054 INFO L130 PetriNetUnfolder]: 23689/34384 cut-off events. [2023-01-28 01:26:47,054 INFO L131 PetriNetUnfolder]: For 123237/123342 co-relation queries the response was YES. [2023-01-28 01:26:47,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144527 conditions, 34384 events. 23689/34384 cut-off events. For 123237/123342 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 195841 event pairs, 4796 based on Foata normal form. 170/32832 useless extension candidates. Maximal degree in co-relation 143587. Up to 22399 conditions per place. [2023-01-28 01:26:47,272 INFO L137 encePairwiseOnDemand]: 383/400 looper letters, 779 selfloop transitions, 235 changer transitions 0/1015 dead transitions. [2023-01-28 01:26:47,273 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 1015 transitions, 15045 flow [2023-01-28 01:26:47,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-01-28 01:26:47,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-01-28 01:26:47,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2480 transitions. [2023-01-28 01:26:47,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34444444444444444 [2023-01-28 01:26:47,275 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2480 transitions. [2023-01-28 01:26:47,276 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2480 transitions. [2023-01-28 01:26:47,276 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 01:26:47,276 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2480 transitions. [2023-01-28 01:26:47,278 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 137.77777777777777) internal successors, (2480), 18 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:26:47,283 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 400.0) internal successors, (7600), 19 states have internal predecessors, (7600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:26:47,284 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 400.0) internal successors, (7600), 19 states have internal predecessors, (7600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:26:47,284 INFO L175 Difference]: Start difference. First operand has 189 places, 619 transitions, 9793 flow. Second operand 18 states and 2480 transitions. [2023-01-28 01:26:47,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 1015 transitions, 15045 flow [2023-01-28 01:26:48,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 1015 transitions, 14763 flow, removed 25 selfloop flow, removed 6 redundant places. [2023-01-28 01:26:48,757 INFO L231 Difference]: Finished difference. Result has 206 places, 678 transitions, 10905 flow [2023-01-28 01:26:48,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=9535, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=619, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=10905, PETRI_PLACES=206, PETRI_TRANSITIONS=678} [2023-01-28 01:26:48,758 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 151 predicate places. [2023-01-28 01:26:48,758 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 678 transitions, 10905 flow [2023-01-28 01:26:48,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 120.85714285714286) internal successors, (1692), 14 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:26:48,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:26:48,759 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] [2023-01-28 01:26:48,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-01-28 01:26:48,759 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)] === [2023-01-28 01:26:48,759 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:26:48,759 INFO L85 PathProgramCache]: Analyzing trace with hash -817633448, now seen corresponding path program 1 times [2023-01-28 01:26:48,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:26:48,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910591518] [2023-01-28 01:26:48,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:26:48,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:26:48,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:26:49,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 01:26:49,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 01:26:49,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910591518] [2023-01-28 01:26:49,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910591518] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 01:26:49,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 01:26:49,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-01-28 01:26:49,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558946423] [2023-01-28 01:26:49,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 01:26:49,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-01-28 01:26:49,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 01:26:49,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-01-28 01:26:49,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2023-01-28 01:26:49,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 400 [2023-01-28 01:26:49,326 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 678 transitions, 10905 flow. Second operand has 14 states, 14 states have (on average 120.85714285714286) internal successors, (1692), 14 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:26:49,326 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 01:26:49,326 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 400 [2023-01-28 01:26:49,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 01:26:56,141 INFO L130 PetriNetUnfolder]: 28177/40868 cut-off events. [2023-01-28 01:26:56,141 INFO L131 PetriNetUnfolder]: For 175941/176048 co-relation queries the response was YES. [2023-01-28 01:26:56,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177540 conditions, 40868 events. 28177/40868 cut-off events. For 175941/176048 co-relation queries the response was YES. Maximal size of possible extension queue 563. Compared 237910 event pairs, 5838 based on Foata normal form. 232/39068 useless extension candidates. Maximal degree in co-relation 176568. Up to 27157 conditions per place. [2023-01-28 01:26:56,470 INFO L137 encePairwiseOnDemand]: 384/400 looper letters, 766 selfloop transitions, 249 changer transitions 0/1016 dead transitions. [2023-01-28 01:26:56,471 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 1016 transitions, 15091 flow [2023-01-28 01:26:56,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-28 01:26:56,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-28 01:26:56,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2343 transitions. [2023-01-28 01:26:56,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34455882352941175 [2023-01-28 01:26:56,475 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2343 transitions. [2023-01-28 01:26:56,475 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2343 transitions. [2023-01-28 01:26:56,475 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 01:26:56,475 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2343 transitions. [2023-01-28 01:26:56,478 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 137.8235294117647) internal successors, (2343), 17 states have internal predecessors, (2343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:26:56,485 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 400.0) internal successors, (7200), 18 states have internal predecessors, (7200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:26:56,485 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 400.0) internal successors, (7200), 18 states have internal predecessors, (7200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:26:56,485 INFO L175 Difference]: Start difference. First operand has 206 places, 678 transitions, 10905 flow. Second operand 17 states and 2343 transitions. [2023-01-28 01:26:56,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 1016 transitions, 15091 flow [2023-01-28 01:26:58,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 1016 transitions, 14878 flow, removed 76 selfloop flow, removed 4 redundant places. [2023-01-28 01:26:58,538 INFO L231 Difference]: Finished difference. Result has 221 places, 706 transitions, 11559 flow [2023-01-28 01:26:58,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=10700, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=678, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=229, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=11559, PETRI_PLACES=221, PETRI_TRANSITIONS=706} [2023-01-28 01:26:58,539 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 166 predicate places. [2023-01-28 01:26:58,539 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 706 transitions, 11559 flow [2023-01-28 01:26:58,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 120.85714285714286) internal successors, (1692), 14 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:26:58,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:26:58,539 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] [2023-01-28 01:26:58,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-01-28 01:26:58,539 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)] === [2023-01-28 01:26:58,539 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:26:58,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1847199192, now seen corresponding path program 2 times [2023-01-28 01:26:58,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:26:58,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289448671] [2023-01-28 01:26:58,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:26:58,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:26:58,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:26:59,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 01:26:59,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 01:26:59,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289448671] [2023-01-28 01:26:59,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289448671] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 01:26:59,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 01:26:59,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-01-28 01:26:59,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587792220] [2023-01-28 01:26:59,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 01:26:59,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-28 01:26:59,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 01:26:59,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-28 01:26:59,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2023-01-28 01:26:59,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 400 [2023-01-28 01:26:59,046 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 706 transitions, 11559 flow. Second operand has 13 states, 13 states have (on average 125.0) internal successors, (1625), 13 states have internal predecessors, (1625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:26:59,046 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 01:26:59,046 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 400 [2023-01-28 01:26:59,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 01:27:06,852 INFO L130 PetriNetUnfolder]: 33353/48265 cut-off events. [2023-01-28 01:27:06,852 INFO L131 PetriNetUnfolder]: For 235254/235359 co-relation queries the response was YES. [2023-01-28 01:27:07,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 212601 conditions, 48265 events. 33353/48265 cut-off events. For 235254/235359 co-relation queries the response was YES. Maximal size of possible extension queue 684. Compared 286921 event pairs, 6301 based on Foata normal form. 230/45984 useless extension candidates. Maximal degree in co-relation 211597. Up to 30069 conditions per place. [2023-01-28 01:27:07,271 INFO L137 encePairwiseOnDemand]: 386/400 looper letters, 768 selfloop transitions, 262 changer transitions 0/1031 dead transitions. [2023-01-28 01:27:07,271 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 1031 transitions, 15776 flow [2023-01-28 01:27:07,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-28 01:27:07,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-28 01:27:07,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2423 transitions. [2023-01-28 01:27:07,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3563235294117647 [2023-01-28 01:27:07,274 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2423 transitions. [2023-01-28 01:27:07,274 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2423 transitions. [2023-01-28 01:27:07,275 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 01:27:07,275 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2423 transitions. [2023-01-28 01:27:07,277 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 142.52941176470588) internal successors, (2423), 17 states have internal predecessors, (2423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:27:07,280 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 400.0) internal successors, (7200), 18 states have internal predecessors, (7200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:27:07,281 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 400.0) internal successors, (7200), 18 states have internal predecessors, (7200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:27:07,281 INFO L175 Difference]: Start difference. First operand has 221 places, 706 transitions, 11559 flow. Second operand 17 states and 2423 transitions. [2023-01-28 01:27:07,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 1031 transitions, 15776 flow [2023-01-28 01:27:09,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 1031 transitions, 15367 flow, removed 105 selfloop flow, removed 6 redundant places. [2023-01-28 01:27:09,748 INFO L231 Difference]: Finished difference. Result has 237 places, 743 transitions, 12323 flow [2023-01-28 01:27:09,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=11166, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=706, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=236, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=12323, PETRI_PLACES=237, PETRI_TRANSITIONS=743} [2023-01-28 01:27:09,749 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 182 predicate places. [2023-01-28 01:27:09,749 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 743 transitions, 12323 flow [2023-01-28 01:27:09,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 125.0) internal successors, (1625), 13 states have internal predecessors, (1625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:27:09,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:27:09,750 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] [2023-01-28 01:27:09,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-01-28 01:27:09,750 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION === [reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-01-28 01:27:09,750 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:27:09,750 INFO L85 PathProgramCache]: Analyzing trace with hash -328851623, now seen corresponding path program 3 times [2023-01-28 01:27:09,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:27:09,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037520903] [2023-01-28 01:27:09,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:27:09,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:27:09,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:27:10,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 01:27:10,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 01:27:10,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037520903] [2023-01-28 01:27:10,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037520903] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 01:27:10,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 01:27:10,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-01-28 01:27:10,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803035919] [2023-01-28 01:27:10,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 01:27:10,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-01-28 01:27:10,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 01:27:10,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-01-28 01:27:10,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2023-01-28 01:27:10,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 400 [2023-01-28 01:27:10,390 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 743 transitions, 12323 flow. Second operand has 14 states, 14 states have (on average 120.85714285714286) internal successors, (1692), 14 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:27:10,390 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 01:27:10,390 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 400 [2023-01-28 01:27:10,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 01:27:19,384 INFO L130 PetriNetUnfolder]: 36871/53345 cut-off events. [2023-01-28 01:27:19,385 INFO L131 PetriNetUnfolder]: For 301155/301244 co-relation queries the response was YES. [2023-01-28 01:27:19,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 239019 conditions, 53345 events. 36871/53345 cut-off events. For 301155/301244 co-relation queries the response was YES. Maximal size of possible extension queue 800. Compared 322204 event pairs, 9073 based on Foata normal form. 214/50660 useless extension candidates. Maximal degree in co-relation 237996. Up to 41200 conditions per place. [2023-01-28 01:27:19,900 INFO L137 encePairwiseOnDemand]: 384/400 looper letters, 825 selfloop transitions, 220 changer transitions 0/1046 dead transitions. [2023-01-28 01:27:19,900 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 1046 transitions, 16769 flow [2023-01-28 01:27:19,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-28 01:27:19,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-28 01:27:19,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2345 transitions. [2023-01-28 01:27:19,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3448529411764706 [2023-01-28 01:27:19,902 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2345 transitions. [2023-01-28 01:27:19,902 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2345 transitions. [2023-01-28 01:27:19,903 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 01:27:19,903 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2345 transitions. [2023-01-28 01:27:19,905 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 137.94117647058823) internal successors, (2345), 17 states have internal predecessors, (2345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:27:19,908 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 400.0) internal successors, (7200), 18 states have internal predecessors, (7200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:27:19,908 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 400.0) internal successors, (7200), 18 states have internal predecessors, (7200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:27:19,909 INFO L175 Difference]: Start difference. First operand has 237 places, 743 transitions, 12323 flow. Second operand 17 states and 2345 transitions. [2023-01-28 01:27:19,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 1046 transitions, 16769 flow [2023-01-28 01:27:23,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 1046 transitions, 16264 flow, removed 176 selfloop flow, removed 4 redundant places. [2023-01-28 01:27:23,885 INFO L231 Difference]: Finished difference. Result has 251 places, 762 transitions, 12591 flow [2023-01-28 01:27:23,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=11812, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=742, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=208, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=12591, PETRI_PLACES=251, PETRI_TRANSITIONS=762} [2023-01-28 01:27:23,889 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 196 predicate places. [2023-01-28 01:27:23,889 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 762 transitions, 12591 flow [2023-01-28 01:27:23,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 120.85714285714286) internal successors, (1692), 14 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:27:23,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:27:23,889 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] [2023-01-28 01:27:23,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-01-28 01:27:23,889 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)] === [2023-01-28 01:27:23,890 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:27:23,890 INFO L85 PathProgramCache]: Analyzing trace with hash 375493628, now seen corresponding path program 1 times [2023-01-28 01:27:23,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:27:23,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567040880] [2023-01-28 01:27:23,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:27:23,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:27:23,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:27:24,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 01:27:24,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 01:27:24,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567040880] [2023-01-28 01:27:24,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567040880] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 01:27:24,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 01:27:24,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-01-28 01:27:24,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526704642] [2023-01-28 01:27:24,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 01:27:24,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-28 01:27:24,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 01:27:24,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-28 01:27:24,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2023-01-28 01:27:24,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 400 [2023-01-28 01:27:24,389 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 762 transitions, 12591 flow. Second operand has 15 states, 15 states have (on average 120.73333333333333) internal successors, (1811), 15 states have internal predecessors, (1811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:27:24,389 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 01:27:24,389 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 400 [2023-01-28 01:27:24,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 01:27:34,859 INFO L130 PetriNetUnfolder]: 42926/62100 cut-off events. [2023-01-28 01:27:34,859 INFO L131 PetriNetUnfolder]: For 391624/391714 co-relation queries the response was YES. [2023-01-28 01:27:35,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 281996 conditions, 62100 events. 42926/62100 cut-off events. For 391624/391714 co-relation queries the response was YES. Maximal size of possible extension queue 929. Compared 385037 event pairs, 11414 based on Foata normal form. 379/59032 useless extension candidates. Maximal degree in co-relation 280964. Up to 47270 conditions per place. [2023-01-28 01:27:35,570 INFO L137 encePairwiseOnDemand]: 383/400 looper letters, 981 selfloop transitions, 291 changer transitions 0/1273 dead transitions. [2023-01-28 01:27:35,571 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 1273 transitions, 21619 flow [2023-01-28 01:27:35,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-01-28 01:27:35,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-01-28 01:27:35,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2469 transitions. [2023-01-28 01:27:35,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34291666666666665 [2023-01-28 01:27:35,573 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2469 transitions. [2023-01-28 01:27:35,573 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2469 transitions. [2023-01-28 01:27:35,573 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 01:27:35,574 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2469 transitions. [2023-01-28 01:27:35,575 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 137.16666666666666) internal successors, (2469), 18 states have internal predecessors, (2469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:27:35,579 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 400.0) internal successors, (7600), 19 states have internal predecessors, (7600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:27:35,579 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 400.0) internal successors, (7600), 19 states have internal predecessors, (7600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:27:35,579 INFO L175 Difference]: Start difference. First operand has 251 places, 762 transitions, 12591 flow. Second operand 18 states and 2469 transitions. [2023-01-28 01:27:35,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 1273 transitions, 21619 flow [2023-01-28 01:27:39,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 1273 transitions, 21063 flow, removed 162 selfloop flow, removed 6 redundant places. [2023-01-28 01:27:39,089 INFO L231 Difference]: Finished difference. Result has 268 places, 855 transitions, 15005 flow [2023-01-28 01:27:39,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=12259, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=762, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=546, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=15005, PETRI_PLACES=268, PETRI_TRANSITIONS=855} [2023-01-28 01:27:39,090 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 213 predicate places. [2023-01-28 01:27:39,090 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 855 transitions, 15005 flow [2023-01-28 01:27:39,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 120.73333333333333) internal successors, (1811), 15 states have internal predecessors, (1811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:27:39,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:27:39,090 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] [2023-01-28 01:27:39,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-01-28 01:27:39,090 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION === [reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-01-28 01:27:39,091 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:27:39,091 INFO L85 PathProgramCache]: Analyzing trace with hash 631734289, now seen corresponding path program 2 times [2023-01-28 01:27:39,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:27:39,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7321691] [2023-01-28 01:27:39,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:27:39,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:27:39,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:27:39,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 01:27:39,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 01:27:39,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7321691] [2023-01-28 01:27:39,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7321691] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 01:27:39,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 01:27:39,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-01-28 01:27:39,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48434306] [2023-01-28 01:27:39,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 01:27:39,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-28 01:27:39,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 01:27:39,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-28 01:27:39,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2023-01-28 01:27:39,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 400 [2023-01-28 01:27:39,786 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 855 transitions, 15005 flow. Second operand has 15 states, 15 states have (on average 120.73333333333333) internal successors, (1811), 15 states have internal predecessors, (1811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:27:39,786 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 01:27:39,787 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 400 [2023-01-28 01:27:39,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 01:27:52,055 INFO L130 PetriNetUnfolder]: 47347/68517 cut-off events. [2023-01-28 01:27:52,056 INFO L131 PetriNetUnfolder]: For 501008/501098 co-relation queries the response was YES. [2023-01-28 01:27:52,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 320393 conditions, 68517 events. 47347/68517 cut-off events. For 501008/501098 co-relation queries the response was YES. Maximal size of possible extension queue 1060. Compared 430329 event pairs, 12418 based on Foata normal form. 229/65029 useless extension candidates. Maximal degree in co-relation 319331. Up to 52331 conditions per place. [2023-01-28 01:27:52,899 INFO L137 encePairwiseOnDemand]: 384/400 looper letters, 946 selfloop transitions, 307 changer transitions 0/1254 dead transitions. [2023-01-28 01:27:52,899 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 1254 transitions, 21062 flow [2023-01-28 01:27:52,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-01-28 01:27:52,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-01-28 01:27:52,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2467 transitions. [2023-01-28 01:27:52,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3426388888888889 [2023-01-28 01:27:52,902 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2467 transitions. [2023-01-28 01:27:52,902 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2467 transitions. [2023-01-28 01:27:52,903 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 01:27:52,903 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2467 transitions. [2023-01-28 01:27:52,905 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 137.05555555555554) internal successors, (2467), 18 states have internal predecessors, (2467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:27:52,908 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 400.0) internal successors, (7600), 19 states have internal predecessors, (7600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:27:52,908 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 400.0) internal successors, (7600), 19 states have internal predecessors, (7600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:27:52,908 INFO L175 Difference]: Start difference. First operand has 268 places, 855 transitions, 15005 flow. Second operand 18 states and 2467 transitions. [2023-01-28 01:27:52,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 1254 transitions, 21062 flow [2023-01-28 01:27:57,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 1254 transitions, 20767 flow, removed 110 selfloop flow, removed 5 redundant places. [2023-01-28 01:27:57,896 INFO L231 Difference]: Finished difference. Result has 283 places, 883 transitions, 15883 flow [2023-01-28 01:27:57,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=14718, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=855, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=287, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=566, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=15883, PETRI_PLACES=283, PETRI_TRANSITIONS=883} [2023-01-28 01:27:57,898 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 228 predicate places. [2023-01-28 01:27:57,898 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 883 transitions, 15883 flow [2023-01-28 01:27:57,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 120.73333333333333) internal successors, (1811), 15 states have internal predecessors, (1811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:27:57,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:27:57,898 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] [2023-01-28 01:27:57,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-01-28 01:27:57,898 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)] === [2023-01-28 01:27:57,898 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:27:57,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1681702791, now seen corresponding path program 3 times [2023-01-28 01:27:57,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:27:57,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779832801] [2023-01-28 01:27:57,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:27:57,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:27:57,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:27:58,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 01:27:58,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 01:27:58,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779832801] [2023-01-28 01:27:58,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779832801] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 01:27:58,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 01:27:58,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-01-28 01:27:58,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773829927] [2023-01-28 01:27:58,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 01:27:58,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-28 01:27:58,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 01:27:58,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-28 01:27:58,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2023-01-28 01:27:58,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 400 [2023-01-28 01:27:58,518 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 883 transitions, 15883 flow. Second operand has 15 states, 15 states have (on average 120.73333333333333) internal successors, (1811), 15 states have internal predecessors, (1811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:27:58,518 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 01:27:58,518 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 400 [2023-01-28 01:27:58,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 01:28:11,118 INFO L130 PetriNetUnfolder]: 47148/68318 cut-off events. [2023-01-28 01:28:11,118 INFO L131 PetriNetUnfolder]: For 520122/520212 co-relation queries the response was YES. [2023-01-28 01:28:11,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 321648 conditions, 68318 events. 47148/68318 cut-off events. For 520122/520212 co-relation queries the response was YES. Maximal size of possible extension queue 1057. Compared 430449 event pairs, 12930 based on Foata normal form. 229/64830 useless extension candidates. Maximal degree in co-relation 320560. Up to 53119 conditions per place. [2023-01-28 01:28:12,005 INFO L137 encePairwiseOnDemand]: 384/400 looper letters, 1006 selfloop transitions, 291 changer transitions 0/1298 dead transitions. [2023-01-28 01:28:12,153 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 1298 transitions, 22738 flow [2023-01-28 01:28:12,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-01-28 01:28:12,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-01-28 01:28:12,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2465 transitions. [2023-01-28 01:28:12,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3423611111111111 [2023-01-28 01:28:12,163 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2465 transitions. [2023-01-28 01:28:12,163 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2465 transitions. [2023-01-28 01:28:12,163 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 01:28:12,163 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2465 transitions. [2023-01-28 01:28:12,165 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 136.94444444444446) internal successors, (2465), 18 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:28:12,169 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 400.0) internal successors, (7600), 19 states have internal predecessors, (7600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:28:12,169 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 400.0) internal successors, (7600), 19 states have internal predecessors, (7600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:28:12,169 INFO L175 Difference]: Start difference. First operand has 283 places, 883 transitions, 15883 flow. Second operand 18 states and 2465 transitions. [2023-01-28 01:28:12,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 1298 transitions, 22738 flow [2023-01-28 01:28:17,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 1298 transitions, 22195 flow, removed 136 selfloop flow, removed 7 redundant places. [2023-01-28 01:28:17,198 INFO L231 Difference]: Finished difference. Result has 293 places, 880 transitions, 15883 flow [2023-01-28 01:28:17,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=15301, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=880, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=291, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=589, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=15883, PETRI_PLACES=293, PETRI_TRANSITIONS=880} [2023-01-28 01:28:17,199 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 238 predicate places. [2023-01-28 01:28:17,199 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 880 transitions, 15883 flow [2023-01-28 01:28:17,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 120.73333333333333) internal successors, (1811), 15 states have internal predecessors, (1811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:28:17,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:28:17,199 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] [2023-01-28 01:28:17,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-01-28 01:28:17,200 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)] === [2023-01-28 01:28:17,200 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:28:17,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1060812850, now seen corresponding path program 2 times [2023-01-28 01:28:17,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:28:17,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195497301] [2023-01-28 01:28:17,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:28:17,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:28:17,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:28:17,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 01:28:17,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 01:28:17,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195497301] [2023-01-28 01:28:17,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195497301] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 01:28:17,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 01:28:17,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2023-01-28 01:28:17,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030557328] [2023-01-28 01:28:17,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 01:28:17,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-01-28 01:28:17,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 01:28:17,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-01-28 01:28:17,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2023-01-28 01:28:17,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 400 [2023-01-28 01:28:17,935 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 880 transitions, 15883 flow. Second operand has 17 states, 17 states have (on average 116.52941176470588) internal successors, (1981), 17 states have internal predecessors, (1981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:28:17,935 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 01:28:17,936 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 400 [2023-01-28 01:28:17,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 01:28:32,950 INFO L130 PetriNetUnfolder]: 53110/77049 cut-off events. [2023-01-28 01:28:32,950 INFO L131 PetriNetUnfolder]: For 637204/637276 co-relation queries the response was YES. [2023-01-28 01:28:33,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 366953 conditions, 77049 events. 53110/77049 cut-off events. For 637204/637276 co-relation queries the response was YES. Maximal size of possible extension queue 1166. Compared 494090 event pairs, 15075 based on Foata normal form. 350/73322 useless extension candidates. Maximal degree in co-relation 365858. Up to 60745 conditions per place. [2023-01-28 01:28:33,959 INFO L137 encePairwiseOnDemand]: 381/400 looper letters, 816 selfloop transitions, 671 changer transitions 0/1488 dead transitions. [2023-01-28 01:28:33,959 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 1488 transitions, 26801 flow [2023-01-28 01:28:33,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-01-28 01:28:33,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-01-28 01:28:33,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 4028 transitions. [2023-01-28 01:28:33,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32483870967741935 [2023-01-28 01:28:33,963 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 4028 transitions. [2023-01-28 01:28:33,963 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 4028 transitions. [2023-01-28 01:28:33,963 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 01:28:33,963 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 4028 transitions. [2023-01-28 01:28:33,966 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 129.93548387096774) internal successors, (4028), 31 states have internal predecessors, (4028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:28:33,972 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 400.0) internal successors, (12800), 32 states have internal predecessors, (12800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:28:33,973 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 400.0) internal successors, (12800), 32 states have internal predecessors, (12800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:28:33,973 INFO L175 Difference]: Start difference. First operand has 293 places, 880 transitions, 15883 flow. Second operand 31 states and 4028 transitions. [2023-01-28 01:28:33,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 1488 transitions, 26801 flow [2023-01-28 01:28:40,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 1488 transitions, 26419 flow, removed 0 selfloop flow, removed 14 redundant places. [2023-01-28 01:28:40,167 INFO L231 Difference]: Finished difference. Result has 322 places, 1119 transitions, 22695 flow [2023-01-28 01:28:40,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=15563, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=880, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=442, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=22695, PETRI_PLACES=322, PETRI_TRANSITIONS=1119} [2023-01-28 01:28:40,167 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 267 predicate places. [2023-01-28 01:28:40,168 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 1119 transitions, 22695 flow [2023-01-28 01:28:40,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 116.52941176470588) internal successors, (1981), 17 states have internal predecessors, (1981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:28:40,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:28:40,168 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] [2023-01-28 01:28:40,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-01-28 01:28:40,168 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)] === [2023-01-28 01:28:40,168 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:28:40,169 INFO L85 PathProgramCache]: Analyzing trace with hash 631734288, now seen corresponding path program 3 times [2023-01-28 01:28:40,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:28:40,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929649370] [2023-01-28 01:28:40,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:28:40,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:28:40,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:28:40,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 01:28:40,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 01:28:40,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929649370] [2023-01-28 01:28:40,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929649370] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 01:28:40,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 01:28:40,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-01-28 01:28:40,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997820461] [2023-01-28 01:28:40,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 01:28:40,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-28 01:28:40,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 01:28:40,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-28 01:28:40,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2023-01-28 01:28:40,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 400 [2023-01-28 01:28:40,805 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 1119 transitions, 22695 flow. Second operand has 15 states, 15 states have (on average 120.73333333333333) internal successors, (1811), 15 states have internal predecessors, (1811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:28:40,805 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 01:28:40,805 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 400 [2023-01-28 01:28:40,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 01:28:57,058 INFO L130 PetriNetUnfolder]: 53014/76863 cut-off events. [2023-01-28 01:28:57,059 INFO L131 PetriNetUnfolder]: For 686818/686972 co-relation queries the response was YES. [2023-01-28 01:28:57,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 380209 conditions, 76863 events. 53014/76863 cut-off events. For 686818/686972 co-relation queries the response was YES. Maximal size of possible extension queue 1160. Compared 492801 event pairs, 13444 based on Foata normal form. 293/73079 useless extension candidates. Maximal degree in co-relation 379090. Up to 57564 conditions per place. [2023-01-28 01:28:58,179 INFO L137 encePairwiseOnDemand]: 384/400 looper letters, 1110 selfloop transitions, 381 changer transitions 0/1492 dead transitions. [2023-01-28 01:28:58,179 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 1492 transitions, 28719 flow [2023-01-28 01:28:58,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-01-28 01:28:58,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-01-28 01:28:58,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2465 transitions. [2023-01-28 01:28:58,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3423611111111111 [2023-01-28 01:28:58,182 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2465 transitions. [2023-01-28 01:28:58,182 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2465 transitions. [2023-01-28 01:28:58,182 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 01:28:58,182 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2465 transitions. [2023-01-28 01:28:58,184 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 136.94444444444446) internal successors, (2465), 18 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:28:58,187 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 400.0) internal successors, (7600), 19 states have internal predecessors, (7600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:28:58,188 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 400.0) internal successors, (7600), 19 states have internal predecessors, (7600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:28:58,188 INFO L175 Difference]: Start difference. First operand has 322 places, 1119 transitions, 22695 flow. Second operand 18 states and 2465 transitions. [2023-01-28 01:28:58,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 1492 transitions, 28719 flow [2023-01-28 01:29:05,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 1492 transitions, 28275 flow, removed 162 selfloop flow, removed 7 redundant places. [2023-01-28 01:29:05,749 INFO L231 Difference]: Finished difference. Result has 333 places, 1117 transitions, 23005 flow [2023-01-28 01:29:05,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=22229, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=381, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=736, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=23005, PETRI_PLACES=333, PETRI_TRANSITIONS=1117} [2023-01-28 01:29:05,750 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 278 predicate places. [2023-01-28 01:29:05,750 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 1117 transitions, 23005 flow [2023-01-28 01:29:05,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 120.73333333333333) internal successors, (1811), 15 states have internal predecessors, (1811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:29:05,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:29:05,750 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] [2023-01-28 01:29:05,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-01-28 01:29:05,750 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION === [reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-01-28 01:29:05,750 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:29:05,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1530501521, now seen corresponding path program 4 times [2023-01-28 01:29:05,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:29:05,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482206186] [2023-01-28 01:29:05,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:29:05,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:29:05,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:29:06,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 01:29:06,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 01:29:06,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482206186] [2023-01-28 01:29:06,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482206186] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 01:29:06,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 01:29:06,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-01-28 01:29:06,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853335887] [2023-01-28 01:29:06,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 01:29:06,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-28 01:29:06,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 01:29:06,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-28 01:29:06,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2023-01-28 01:29:06,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 400 [2023-01-28 01:29:06,260 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 1117 transitions, 23005 flow. Second operand has 15 states, 15 states have (on average 120.73333333333333) internal successors, (1811), 15 states have internal predecessors, (1811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:29:06,260 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 01:29:06,260 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 400 [2023-01-28 01:29:06,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 01:29:24,375 INFO L130 PetriNetUnfolder]: 58275/84345 cut-off events. [2023-01-28 01:29:24,375 INFO L131 PetriNetUnfolder]: For 829136/829290 co-relation queries the response was YES. [2023-01-28 01:29:25,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 419104 conditions, 84345 events. 58275/84345 cut-off events. For 829136/829290 co-relation queries the response was YES. Maximal size of possible extension queue 1295. Compared 547705 event pairs, 14658 based on Foata normal form. 432/80270 useless extension candidates. Maximal degree in co-relation 417951. Up to 61018 conditions per place. [2023-01-28 01:29:25,652 INFO L137 encePairwiseOnDemand]: 384/400 looper letters, 1102 selfloop transitions, 411 changer transitions 0/1514 dead transitions. [2023-01-28 01:29:25,653 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 1514 transitions, 29639 flow [2023-01-28 01:29:25,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-01-28 01:29:25,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-01-28 01:29:25,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2614 transitions. [2023-01-28 01:29:25,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3439473684210526 [2023-01-28 01:29:25,655 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2614 transitions. [2023-01-28 01:29:25,655 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2614 transitions. [2023-01-28 01:29:25,656 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 01:29:25,656 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2614 transitions. [2023-01-28 01:29:25,658 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 137.57894736842104) internal successors, (2614), 19 states have internal predecessors, (2614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:29:25,661 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 400.0) internal successors, (8000), 20 states have internal predecessors, (8000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:29:25,662 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 400.0) internal successors, (8000), 20 states have internal predecessors, (8000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:29:25,662 INFO L175 Difference]: Start difference. First operand has 333 places, 1117 transitions, 23005 flow. Second operand 19 states and 2614 transitions. [2023-01-28 01:29:25,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 1514 transitions, 29639 flow [2023-01-28 01:29:34,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 1514 transitions, 29192 flow, removed 2 selfloop flow, removed 17 redundant places. [2023-01-28 01:29:34,386 INFO L231 Difference]: Finished difference. Result has 340 places, 1151 transitions, 24246 flow [2023-01-28 01:29:34,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=22561, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=387, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=726, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=24246, PETRI_PLACES=340, PETRI_TRANSITIONS=1151} [2023-01-28 01:29:34,387 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 285 predicate places. [2023-01-28 01:29:34,387 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 1151 transitions, 24246 flow [2023-01-28 01:29:34,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 120.73333333333333) internal successors, (1811), 15 states have internal predecessors, (1811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:29:34,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:29:34,387 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] [2023-01-28 01:29:34,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-01-28 01:29:34,387 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)] === [2023-01-28 01:29:34,387 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:29:34,388 INFO L85 PathProgramCache]: Analyzing trace with hash 11780390, now seen corresponding path program 3 times [2023-01-28 01:29:34,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:29:34,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618404981] [2023-01-28 01:29:34,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:29:34,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:29:34,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:29:34,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 01:29:34,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 01:29:34,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618404981] [2023-01-28 01:29:34,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618404981] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 01:29:34,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 01:29:34,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-01-28 01:29:34,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232337845] [2023-01-28 01:29:34,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 01:29:34,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-01-28 01:29:34,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 01:29:34,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-01-28 01:29:34,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2023-01-28 01:29:34,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 400 [2023-01-28 01:29:34,903 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 1151 transitions, 24246 flow. Second operand has 14 states, 14 states have (on average 120.85714285714286) internal successors, (1692), 14 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:29:34,903 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 01:29:34,904 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 400 [2023-01-28 01:29:34,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 01:29:53,167 INFO L130 PetriNetUnfolder]: 58251/84321 cut-off events. [2023-01-28 01:29:53,168 INFO L131 PetriNetUnfolder]: For 811378/811589 co-relation queries the response was YES. [2023-01-28 01:29:54,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 427557 conditions, 84321 events. 58251/84321 cut-off events. For 811378/811589 co-relation queries the response was YES. Maximal size of possible extension queue 1271. Compared 547630 event pairs, 17100 based on Foata normal form. 324/80138 useless extension candidates. Maximal degree in co-relation 426380. Up to 68259 conditions per place. [2023-01-28 01:29:54,844 INFO L137 encePairwiseOnDemand]: 385/400 looper letters, 1245 selfloop transitions, 348 changer transitions 0/1594 dead transitions. [2023-01-28 01:29:54,845 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 1594 transitions, 32436 flow [2023-01-28 01:29:54,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-01-28 01:29:54,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-01-28 01:29:54,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2468 transitions. [2023-01-28 01:29:54,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3427777777777778 [2023-01-28 01:29:54,847 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2468 transitions. [2023-01-28 01:29:54,847 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2468 transitions. [2023-01-28 01:29:54,847 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 01:29:54,847 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2468 transitions. [2023-01-28 01:29:54,849 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 137.11111111111111) internal successors, (2468), 18 states have internal predecessors, (2468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:29:54,868 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 400.0) internal successors, (7600), 19 states have internal predecessors, (7600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:29:54,868 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 400.0) internal successors, (7600), 19 states have internal predecessors, (7600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:29:54,868 INFO L175 Difference]: Start difference. First operand has 340 places, 1151 transitions, 24246 flow. Second operand 18 states and 2468 transitions. [2023-01-28 01:29:54,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 1594 transitions, 32436 flow [2023-01-28 01:30:07,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 1594 transitions, 30872 flow, removed 211 selfloop flow, removed 8 redundant places. [2023-01-28 01:30:07,544 INFO L231 Difference]: Finished difference. Result has 349 places, 1148 transitions, 23706 flow [2023-01-28 01:30:07,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=23010, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=348, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=800, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=23706, PETRI_PLACES=349, PETRI_TRANSITIONS=1148} [2023-01-28 01:30:07,545 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 294 predicate places. [2023-01-28 01:30:07,545 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 1148 transitions, 23706 flow [2023-01-28 01:30:07,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 120.85714285714286) internal successors, (1692), 14 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:30:07,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:30:07,545 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] [2023-01-28 01:30:07,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-01-28 01:30:07,545 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION === [reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-01-28 01:30:07,546 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:30:07,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1030404897, now seen corresponding path program 5 times [2023-01-28 01:30:07,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:30:07,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58507032] [2023-01-28 01:30:07,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:30:07,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:30:07,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:30:08,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 01:30:08,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 01:30:08,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58507032] [2023-01-28 01:30:08,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58507032] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 01:30:08,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 01:30:08,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-01-28 01:30:08,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884788812] [2023-01-28 01:30:08,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 01:30:08,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-28 01:30:08,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 01:30:08,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-28 01:30:08,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2023-01-28 01:30:08,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 400 [2023-01-28 01:30:08,061 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 1148 transitions, 23706 flow. Second operand has 15 states, 15 states have (on average 120.73333333333333) internal successors, (1811), 15 states have internal predecessors, (1811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:30:08,061 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 01:30:08,061 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 400 [2023-01-28 01:30:08,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 01:30:27,325 INFO L130 PetriNetUnfolder]: 61249/88728 cut-off events. [2023-01-28 01:30:27,326 INFO L131 PetriNetUnfolder]: For 918464/918502 co-relation queries the response was YES. [2023-01-28 01:30:28,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 443422 conditions, 88728 events. 61249/88728 cut-off events. For 918464/918502 co-relation queries the response was YES. Maximal size of possible extension queue 1406. Compared 580093 event pairs, 19885 based on Foata normal form. 177/84010 useless extension candidates. Maximal degree in co-relation 442336. Up to 71899 conditions per place. [2023-01-28 01:30:28,791 INFO L137 encePairwiseOnDemand]: 384/400 looper letters, 1115 selfloop transitions, 344 changer transitions 0/1460 dead transitions. [2023-01-28 01:30:28,791 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 1460 transitions, 29453 flow [2023-01-28 01:30:28,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-01-28 01:30:28,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-01-28 01:30:28,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2470 transitions. [2023-01-28 01:30:28,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34305555555555556 [2023-01-28 01:30:28,793 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2470 transitions. [2023-01-28 01:30:28,794 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2470 transitions. [2023-01-28 01:30:28,794 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 01:30:28,794 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2470 transitions. [2023-01-28 01:30:28,796 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 137.22222222222223) internal successors, (2470), 18 states have internal predecessors, (2470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:30:28,799 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 400.0) internal successors, (7600), 19 states have internal predecessors, (7600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:30:28,799 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 400.0) internal successors, (7600), 19 states have internal predecessors, (7600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:30:28,799 INFO L175 Difference]: Start difference. First operand has 349 places, 1148 transitions, 23706 flow. Second operand 18 states and 2470 transitions. [2023-01-28 01:30:28,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 1460 transitions, 29453 flow [2023-01-28 01:30:37,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 1460 transitions, 28620 flow, removed 0 selfloop flow, removed 15 redundant places. [2023-01-28 01:30:37,195 INFO L231 Difference]: Finished difference. Result has 353 places, 1168 transitions, 24295 flow [2023-01-28 01:30:37,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=23014, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=332, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=814, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=24295, PETRI_PLACES=353, PETRI_TRANSITIONS=1168} [2023-01-28 01:30:37,196 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 298 predicate places. [2023-01-28 01:30:37,196 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 1168 transitions, 24295 flow [2023-01-28 01:30:37,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 120.73333333333333) internal successors, (1811), 15 states have internal predecessors, (1811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:30:37,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:30:37,197 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] [2023-01-28 01:30:37,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-01-28 01:30:37,197 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION === [reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-01-28 01:30:37,197 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:30:37,197 INFO L85 PathProgramCache]: Analyzing trace with hash 770688840, now seen corresponding path program 4 times [2023-01-28 01:30:37,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:30:37,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845220472] [2023-01-28 01:30:37,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:30:37,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:30:37,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:30:37,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 01:30:37,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 01:30:37,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845220472] [2023-01-28 01:30:37,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845220472] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 01:30:37,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 01:30:37,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-01-28 01:30:37,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107170761] [2023-01-28 01:30:37,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 01:30:37,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-01-28 01:30:37,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 01:30:37,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-01-28 01:30:37,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2023-01-28 01:30:37,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 400 [2023-01-28 01:30:37,722 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 1168 transitions, 24295 flow. Second operand has 14 states, 14 states have (on average 120.85714285714286) internal successors, (1692), 14 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:30:37,722 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 01:30:37,722 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 400 [2023-01-28 01:30:37,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 01:30:57,267 INFO L130 PetriNetUnfolder]: 61464/88916 cut-off events. [2023-01-28 01:30:57,267 INFO L131 PetriNetUnfolder]: For 909492/909655 co-relation queries the response was YES. [2023-01-28 01:30:58,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 445529 conditions, 88916 events. 61464/88916 cut-off events. For 909492/909655 co-relation queries the response was YES. Maximal size of possible extension queue 1392. Compared 581325 event pairs, 18922 based on Foata normal form. 276/84297 useless extension candidates. Maximal degree in co-relation 444380. Up to 72828 conditions per place. [2023-01-28 01:30:58,780 INFO L137 encePairwiseOnDemand]: 385/400 looper letters, 1207 selfloop transitions, 334 changer transitions 0/1542 dead transitions. [2023-01-28 01:30:58,780 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 1542 transitions, 31437 flow [2023-01-28 01:30:58,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-28 01:30:58,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-28 01:30:58,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2336 transitions. [2023-01-28 01:30:58,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34352941176470586 [2023-01-28 01:30:58,782 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2336 transitions. [2023-01-28 01:30:58,782 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2336 transitions. [2023-01-28 01:30:58,783 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 01:30:58,783 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2336 transitions. [2023-01-28 01:30:58,784 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 137.41176470588235) internal successors, (2336), 17 states have internal predecessors, (2336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:30:58,787 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 400.0) internal successors, (7200), 18 states have internal predecessors, (7200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:30:58,787 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 400.0) internal successors, (7200), 18 states have internal predecessors, (7200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:30:58,787 INFO L175 Difference]: Start difference. First operand has 353 places, 1168 transitions, 24295 flow. Second operand 17 states and 2336 transitions. [2023-01-28 01:30:58,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 1542 transitions, 31437 flow [2023-01-28 01:31:09,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 1542 transitions, 29635 flow, removed 276 selfloop flow, removed 19 redundant places. [2023-01-28 01:31:09,313 INFO L231 Difference]: Finished difference. Result has 351 places, 1166 transitions, 23553 flow [2023-01-28 01:31:09,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=22877, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=334, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=832, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=23553, PETRI_PLACES=351, PETRI_TRANSITIONS=1166} [2023-01-28 01:31:09,314 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 296 predicate places. [2023-01-28 01:31:09,314 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 1166 transitions, 23553 flow [2023-01-28 01:31:09,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 120.85714285714286) internal successors, (1692), 14 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:31:09,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:31:09,314 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] [2023-01-28 01:31:09,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-01-28 01:31:09,314 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)] === [2023-01-28 01:31:09,315 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:31:09,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1030404896, now seen corresponding path program 4 times [2023-01-28 01:31:09,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:31:09,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569909748] [2023-01-28 01:31:09,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:31:09,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:31:09,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:31:09,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 01:31:09,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 01:31:09,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569909748] [2023-01-28 01:31:09,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569909748] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 01:31:09,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 01:31:09,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-01-28 01:31:09,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957302071] [2023-01-28 01:31:09,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 01:31:09,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-28 01:31:09,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 01:31:09,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-28 01:31:09,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2023-01-28 01:31:09,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 400 [2023-01-28 01:31:09,782 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 1166 transitions, 23553 flow. Second operand has 15 states, 15 states have (on average 120.73333333333333) internal successors, (1811), 15 states have internal predecessors, (1811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:31:09,783 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 01:31:09,783 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 400 [2023-01-28 01:31:09,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand