/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-RepeatedSemanticLbe.epf --traceabstraction.use.on-demand.petri.net.difference true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-divine/ring_2w1r-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.repeated-lipton-8d0d62b [2022-12-06 01:39:03,085 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-06 01:39:03,087 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-06 01:39:03,134 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-06 01:39:03,134 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-06 01:39:03,135 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-06 01:39:03,136 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-06 01:39:03,137 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-06 01:39:03,138 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-06 01:39:03,139 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-06 01:39:03,139 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-06 01:39:03,140 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-06 01:39:03,140 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-06 01:39:03,141 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-06 01:39:03,142 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-06 01:39:03,142 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-06 01:39:03,143 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-06 01:39:03,143 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-06 01:39:03,144 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-06 01:39:03,146 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-06 01:39:03,146 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-06 01:39:03,147 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-06 01:39:03,148 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-06 01:39:03,149 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-06 01:39:03,151 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-06 01:39:03,151 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-06 01:39:03,152 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-06 01:39:03,152 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-06 01:39:03,153 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-06 01:39:03,154 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-06 01:39:03,154 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-06 01:39:03,154 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-06 01:39:03,155 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-06 01:39:03,156 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-06 01:39:03,156 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-06 01:39:03,156 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-06 01:39:03,157 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-06 01:39:03,157 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-06 01:39:03,157 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-06 01:39:03,158 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-06 01:39:03,158 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-06 01:39:03,160 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-RepeatedSemanticLbe.epf [2022-12-06 01:39:03,181 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-06 01:39:03,182 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-06 01:39:03,183 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-06 01:39:03,183 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-06 01:39:03,183 INFO L138 SettingsManager]: * Use SBE=true [2022-12-06 01:39:03,184 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-06 01:39:03,184 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-06 01:39:03,184 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-06 01:39:03,184 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-06 01:39:03,185 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-06 01:39:03,185 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-06 01:39:03,185 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-06 01:39:03,185 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-06 01:39:03,185 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-06 01:39:03,186 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-06 01:39:03,186 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-06 01:39:03,186 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-06 01:39:03,186 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-06 01:39:03,186 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-06 01:39:03,186 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-12-06 01:39:03,186 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-06 01:39:03,186 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-06 01:39:03,186 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-06 01:39:03,186 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-06 01:39:03,187 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-06 01:39:03,187 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-06 01:39:03,187 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-06 01:39:03,187 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=REPEATED_LIPTON_PN [2022-12-06 01:39:03,187 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use on-demand Petri net difference -> true [2022-12-06 01:39:03,430 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-06 01:39:03,444 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-06 01:39:03,446 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-06 01:39:03,446 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-06 01:39:03,446 INFO L275 PluginConnector]: CDTParser initialized [2022-12-06 01:39:03,447 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-divine/ring_2w1r-1.i [2022-12-06 01:39:04,463 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-06 01:39:04,798 INFO L351 CDTParser]: Found 1 translation units. [2022-12-06 01:39:04,799 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-divine/ring_2w1r-1.i [2022-12-06 01:39:04,823 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d64eb0a8/258e58fb0cc3456b92af52994f9bdacb/FLAGb91209ca9 [2022-12-06 01:39:04,834 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d64eb0a8/258e58fb0cc3456b92af52994f9bdacb [2022-12-06 01:39:04,837 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-06 01:39:04,838 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-12-06 01:39:04,841 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-06 01:39:04,841 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-06 01:39:04,843 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-06 01:39:04,844 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 01:39:04" (1/1) ... [2022-12-06 01:39:04,845 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48287c28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 01:39:04, skipping insertion in model container [2022-12-06 01:39:04,845 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 01:39:04" (1/1) ... [2022-12-06 01:39:04,849 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-06 01:39:04,894 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-06 01:39:05,017 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-12-06 01:39:05,167 WARN L237 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] [2022-12-06 01:39:05,170 WARN L237 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] [2022-12-06 01:39:05,171 WARN L237 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] [2022-12-06 01:39:05,223 WARN L237 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] [2022-12-06 01:39:05,223 WARN L237 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] [2022-12-06 01:39:05,227 WARN L237 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] [2022-12-06 01:39:05,228 WARN L237 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] [2022-12-06 01:39:05,236 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-06 01:39:05,244 INFO L203 MainTranslator]: Completed pre-run [2022-12-06 01:39:05,265 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-12-06 01:39:05,299 WARN L237 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] [2022-12-06 01:39:05,300 WARN L237 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] [2022-12-06 01:39:05,300 WARN L237 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] [2022-12-06 01:39:05,311 WARN L237 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] [2022-12-06 01:39:05,312 WARN L237 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] [2022-12-06 01:39:05,313 WARN L237 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] [2022-12-06 01:39:05,314 WARN L237 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] [2022-12-06 01:39:05,317 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-06 01:39:05,373 INFO L208 MainTranslator]: Completed translation [2022-12-06 01:39:05,374 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 01:39:05 WrapperNode [2022-12-06 01:39:05,374 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-06 01:39:05,375 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-06 01:39:05,375 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-06 01:39:05,375 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-06 01:39:05,380 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 01:39:05" (1/1) ... [2022-12-06 01:39:05,396 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 01:39:05" (1/1) ... [2022-12-06 01:39:05,426 INFO L138 Inliner]: procedures = 310, calls = 70, calls flagged for inlining = 10, calls inlined = 8, statements flattened = 203 [2022-12-06 01:39:05,426 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-06 01:39:05,427 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-06 01:39:05,427 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-06 01:39:05,427 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-06 01:39:05,433 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 01:39:05" (1/1) ... [2022-12-06 01:39:05,434 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 01:39:05" (1/1) ... [2022-12-06 01:39:05,437 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 01:39:05" (1/1) ... [2022-12-06 01:39:05,438 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 01:39:05" (1/1) ... [2022-12-06 01:39:05,452 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 01:39:05" (1/1) ... [2022-12-06 01:39:05,456 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 01:39:05" (1/1) ... [2022-12-06 01:39:05,458 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 01:39:05" (1/1) ... [2022-12-06 01:39:05,467 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 01:39:05" (1/1) ... [2022-12-06 01:39:05,469 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-06 01:39:05,470 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-06 01:39:05,470 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-06 01:39:05,470 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-06 01:39:05,471 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 01:39:05" (1/1) ... [2022-12-06 01:39:05,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-06 01:39:05,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-06 01:39:05,512 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) [2022-12-06 01:39:05,540 INFO L130 BoogieDeclarations]: Found specification of procedure reader_two [2022-12-06 01:39:05,540 INFO L138 BoogieDeclarations]: Found implementation of procedure reader_two [2022-12-06 01:39:05,540 INFO L130 BoogieDeclarations]: Found specification of procedure writer_fn [2022-12-06 01:39:05,540 INFO L138 BoogieDeclarations]: Found implementation of procedure writer_fn [2022-12-06 01:39:05,541 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-06 01:39:05,541 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-06 01:39:05,541 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-06 01:39:05,541 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-06 01:39:05,541 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-12-06 01:39:05,541 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-06 01:39:05,541 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-06 01:39:05,542 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-06 01:39:05,542 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-06 01:39:05,518 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 [2022-12-06 01:39:05,545 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2022-12-06 01:39:05,708 INFO L236 CfgBuilder]: Building ICFG [2022-12-06 01:39:05,710 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-06 01:39:06,049 INFO L277 CfgBuilder]: Performing block encoding [2022-12-06 01:39:06,055 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-06 01:39:06,055 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2022-12-06 01:39:06,056 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 01:39:06 BoogieIcfgContainer [2022-12-06 01:39:06,057 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-06 01:39:06,058 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-06 01:39:06,058 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-06 01:39:06,062 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-06 01:39:06,062 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 01:39:04" (1/3) ... [2022-12-06 01:39:06,063 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bc5578b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 01:39:06, skipping insertion in model container [2022-12-06 01:39:06,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 01:39:05" (2/3) ... [2022-12-06 01:39:06,063 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bc5578b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 01:39:06, skipping insertion in model container [2022-12-06 01:39:06,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 01:39:06" (3/3) ... [2022-12-06 01:39:06,064 INFO L112 eAbstractionObserver]: Analyzing ICFG ring_2w1r-1.i [2022-12-06 01:39:06,079 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-06 01:39:06,079 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2022-12-06 01:39:06,079 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-06 01:39:06,154 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-06 01:39:06,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 207 places, 217 transitions, 450 flow [2022-12-06 01:39:06,302 INFO L130 PetriNetUnfolder]: 17/215 cut-off events. [2022-12-06 01:39:06,302 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-06 01:39:06,313 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. [2022-12-06 01:39:06,313 INFO L82 GeneralOperation]: Start removeDead. Operand has 207 places, 217 transitions, 450 flow [2022-12-06 01:39:06,322 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 195 places, 205 transitions, 419 flow [2022-12-06 01:39:06,324 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-06 01:39:06,343 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 195 places, 205 transitions, 419 flow [2022-12-06 01:39:06,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 195 places, 205 transitions, 419 flow [2022-12-06 01:39:06,382 INFO L130 PetriNetUnfolder]: 17/205 cut-off events. [2022-12-06 01:39:06,382 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-06 01:39:06,383 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. [2022-12-06 01:39:06,396 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 195 places, 205 transitions, 419 flow [2022-12-06 01:39:06,396 INFO L188 LiptonReduction]: Number of co-enabled transitions 16824 [2022-12-06 01:39:11,423 INFO L203 LiptonReduction]: Total number of compositions: 162 [2022-12-06 01:39:11,441 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-06 01:39:11,446 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=REPEATED_LIPTON_PN, 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;@79d28d78, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-06 01:39:11,446 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2022-12-06 01:39:11,454 INFO L130 PetriNetUnfolder]: 9/47 cut-off events. [2022-12-06 01:39:11,454 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-06 01:39:11,455 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 01:39:11,456 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-06 01:39:11,456 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION === [reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2022-12-06 01:39:11,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 01:39:11,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1887210253, now seen corresponding path program 1 times [2022-12-06 01:39:11,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 01:39:11,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213525918] [2022-12-06 01:39:11,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 01:39:11,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 01:39:11,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 01:39:11,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 01:39:11,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-06 01:39:11,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213525918] [2022-12-06 01:39:11,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213525918] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-06 01:39:11,608 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-06 01:39:11,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-06 01:39:11,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905026162] [2022-12-06 01:39:11,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-06 01:39:11,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-06 01:39:11,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-06 01:39:11,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-06 01:39:11,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-06 01:39:11,635 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 63 [2022-12-06 01:39:11,636 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 63 transitions, 135 flow. Second operand has 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 01:39:11,637 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-06 01:39:11,637 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 63 [2022-12-06 01:39:11,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-06 01:39:11,928 INFO L130 PetriNetUnfolder]: 1926/2897 cut-off events. [2022-12-06 01:39:11,929 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2022-12-06 01:39:11,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5631 conditions, 2897 events. 1926/2897 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 14489 event pairs, 1279 based on Foata normal form. 303/2440 useless extension candidates. Maximal degree in co-relation 5563. Up to 2687 conditions per place. [2022-12-06 01:39:11,946 INFO L137 encePairwiseOnDemand]: 57/63 looper letters, 36 selfloop transitions, 0 changer transitions 3/57 dead transitions. [2022-12-06 01:39:11,946 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 57 transitions, 201 flow [2022-12-06 01:39:11,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-06 01:39:11,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-12-06 01:39:11,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 81 transitions. [2022-12-06 01:39:11,956 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2022-12-06 01:39:11,959 INFO L294 CegarLoopForPetriNet]: 57 programPoint places, 1 predicate places. [2022-12-06 01:39:11,960 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-06 01:39:11,960 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 58 places, 57 transitions, 201 flow [2022-12-06 01:39:11,979 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 58 places, 57 transitions, 201 flow [2022-12-06 01:39:11,980 INFO L188 LiptonReduction]: Number of co-enabled transitions 988 [2022-12-06 01:39:12,464 INFO L203 LiptonReduction]: Total number of compositions: 15 [2022-12-06 01:39:12,466 INFO L143 eatedLiptonReduction]: Time needed for LBE in milliseconds: 507 [2022-12-06 01:39:12,466 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 44 transitions, 175 flow [2022-12-06 01:39:12,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 01:39:12,466 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 01:39:12,466 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-06 01:39:12,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-06 01:39:12,467 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)] === [2022-12-06 01:39:12,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 01:39:12,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1510832504, now seen corresponding path program 1 times [2022-12-06 01:39:12,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 01:39:12,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837480855] [2022-12-06 01:39:12,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 01:39:12,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 01:39:12,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 01:39:13,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 01:39:13,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-06 01:39:13,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837480855] [2022-12-06 01:39:13,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837480855] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-06 01:39:13,057 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-06 01:39:13,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-06 01:39:13,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647794499] [2022-12-06 01:39:13,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-06 01:39:13,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-06 01:39:13,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-06 01:39:13,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-06 01:39:13,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-06 01:39:13,059 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 44 [2022-12-06 01:39:13,059 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 44 transitions, 175 flow. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 01:39:13,059 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-06 01:39:13,059 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 44 [2022-12-06 01:39:13,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-06 01:39:13,558 INFO L130 PetriNetUnfolder]: 2529/3664 cut-off events. [2022-12-06 01:39:13,558 INFO L131 PetriNetUnfolder]: For 114/114 co-relation queries the response was YES. [2022-12-06 01:39:13,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10730 conditions, 3664 events. 2529/3664 cut-off events. For 114/114 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 15773 event pairs, 1454 based on Foata normal form. 58/2685 useless extension candidates. Maximal degree in co-relation 10527. Up to 3360 conditions per place. [2022-12-06 01:39:13,574 INFO L137 encePairwiseOnDemand]: 36/44 looper letters, 52 selfloop transitions, 12 changer transitions 9/76 dead transitions. [2022-12-06 01:39:13,574 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 76 transitions, 451 flow [2022-12-06 01:39:13,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-06 01:39:13,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-06 01:39:13,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 99 transitions. [2022-12-06 01:39:13,576 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.28125 [2022-12-06 01:39:13,577 INFO L294 CegarLoopForPetriNet]: 57 programPoint places, -5 predicate places. [2022-12-06 01:39:13,577 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-06 01:39:13,577 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 52 places, 76 transitions, 451 flow [2022-12-06 01:39:13,589 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 52 places, 76 transitions, 451 flow [2022-12-06 01:39:13,589 INFO L188 LiptonReduction]: Number of co-enabled transitions 200 [2022-12-06 01:39:15,065 INFO L203 LiptonReduction]: Total number of compositions: 2 [2022-12-06 01:39:15,066 INFO L143 eatedLiptonReduction]: Time needed for LBE in milliseconds: 1489 [2022-12-06 01:39:15,067 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 75 transitions, 451 flow [2022-12-06 01:39:15,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 01:39:15,067 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 01:39:15,067 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-06 01:39:15,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-06 01:39:15,067 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)] === [2022-12-06 01:39:15,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 01:39:15,068 INFO L85 PathProgramCache]: Analyzing trace with hash 348873019, now seen corresponding path program 1 times [2022-12-06 01:39:15,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 01:39:15,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334146393] [2022-12-06 01:39:15,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 01:39:15,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 01:39:15,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 01:39:15,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 01:39:15,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-06 01:39:15,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334146393] [2022-12-06 01:39:15,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334146393] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-06 01:39:15,467 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-06 01:39:15,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-06 01:39:15,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843543890] [2022-12-06 01:39:15,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-06 01:39:15,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-06 01:39:15,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-06 01:39:15,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-06 01:39:15,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-06 01:39:15,468 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 45 [2022-12-06 01:39:15,468 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 75 transitions, 451 flow. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 01:39:15,468 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-06 01:39:15,469 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 45 [2022-12-06 01:39:15,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-06 01:39:16,200 INFO L130 PetriNetUnfolder]: 3561/5171 cut-off events. [2022-12-06 01:39:16,201 INFO L131 PetriNetUnfolder]: For 246/246 co-relation queries the response was YES. [2022-12-06 01:39:16,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20154 conditions, 5171 events. 3561/5171 cut-off events. For 246/246 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 24017 event pairs, 494 based on Foata normal form. 92/3770 useless extension candidates. Maximal degree in co-relation 19668. Up to 4682 conditions per place. [2022-12-06 01:39:16,229 INFO L137 encePairwiseOnDemand]: 32/45 looper letters, 110 selfloop transitions, 24 changer transitions 47/183 dead transitions. [2022-12-06 01:39:16,230 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 183 transitions, 1456 flow [2022-12-06 01:39:16,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-06 01:39:16,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-06 01:39:16,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2022-12-06 01:39:16,234 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.45 [2022-12-06 01:39:16,235 INFO L294 CegarLoopForPetriNet]: 57 programPoint places, 1 predicate places. [2022-12-06 01:39:16,236 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-06 01:39:16,236 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 58 places, 183 transitions, 1456 flow [2022-12-06 01:39:16,255 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 58 places, 183 transitions, 1456 flow [2022-12-06 01:39:16,255 INFO L188 LiptonReduction]: Number of co-enabled transitions 392 [2022-12-06 01:39:16,258 INFO L203 LiptonReduction]: Total number of compositions: 0 [2022-12-06 01:39:16,259 INFO L143 eatedLiptonReduction]: Time needed for LBE in milliseconds: 23 [2022-12-06 01:39:16,259 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 183 transitions, 1456 flow [2022-12-06 01:39:16,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 01:39:16,259 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 01:39:16,260 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-06 01:39:16,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-06 01:39:16,260 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)] === [2022-12-06 01:39:16,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 01:39:16,260 INFO L85 PathProgramCache]: Analyzing trace with hash -39005801, now seen corresponding path program 2 times [2022-12-06 01:39:16,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 01:39:16,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447535028] [2022-12-06 01:39:16,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 01:39:16,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 01:39:16,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 01:39:16,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 01:39:16,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-06 01:39:16,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447535028] [2022-12-06 01:39:16,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447535028] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-06 01:39:16,603 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-06 01:39:16,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-06 01:39:16,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523313205] [2022-12-06 01:39:16,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-06 01:39:16,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-06 01:39:16,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-06 01:39:16,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-06 01:39:16,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-06 01:39:16,604 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 44 [2022-12-06 01:39:16,604 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 183 transitions, 1456 flow. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 01:39:16,604 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-06 01:39:16,604 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 44 [2022-12-06 01:39:16,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-06 01:39:17,273 INFO L130 PetriNetUnfolder]: 3332/4890 cut-off events. [2022-12-06 01:39:17,273 INFO L131 PetriNetUnfolder]: For 180/180 co-relation queries the response was YES. [2022-12-06 01:39:17,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23823 conditions, 4890 events. 3332/4890 cut-off events. For 180/180 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 22313 event pairs, 586 based on Foata normal form. 92/3560 useless extension candidates. Maximal degree in co-relation 23222. Up to 4409 conditions per place. [2022-12-06 01:39:17,296 INFO L137 encePairwiseOnDemand]: 34/44 looper letters, 119 selfloop transitions, 23 changer transitions 80/224 dead transitions. [2022-12-06 01:39:17,296 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 224 transitions, 2216 flow [2022-12-06 01:39:17,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-06 01:39:17,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-06 01:39:17,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2022-12-06 01:39:17,297 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.4375 [2022-12-06 01:39:17,298 INFO L294 CegarLoopForPetriNet]: 57 programPoint places, 8 predicate places. [2022-12-06 01:39:17,298 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-06 01:39:17,298 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 65 places, 224 transitions, 2216 flow [2022-12-06 01:39:17,318 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 65 places, 224 transitions, 2216 flow [2022-12-06 01:39:17,318 INFO L188 LiptonReduction]: Number of co-enabled transitions 466 [2022-12-06 01:45:20,810 INFO L203 LiptonReduction]: Total number of compositions: 1 [2022-12-06 01:45:20,811 INFO L143 eatedLiptonReduction]: Time needed for LBE in milliseconds: 363513 [2022-12-06 01:45:20,811 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 224 transitions, 2224 flow [2022-12-06 01:45:20,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 01:45:20,812 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 01:45:20,812 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-06 01:45:20,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-06 01:45:20,812 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)] === [2022-12-06 01:45:20,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 01:45:20,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1636947910, now seen corresponding path program 1 times [2022-12-06 01:45:20,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 01:45:20,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739629864] [2022-12-06 01:45:20,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 01:45:20,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 01:45:20,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 01:45:21,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 01:45:21,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-06 01:45:21,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739629864] [2022-12-06 01:45:21,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739629864] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-06 01:45:21,527 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-06 01:45:21,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-12-06 01:45:21,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105390021] [2022-12-06 01:45:21,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-06 01:45:21,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-06 01:45:21,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-06 01:45:21,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-06 01:45:21,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-12-06 01:45:21,530 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 46 [2022-12-06 01:45:21,530 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 224 transitions, 2224 flow. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 01:45:21,530 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-06 01:45:21,530 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 46 [2022-12-06 01:45:21,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-06 01:45:22,752 INFO L130 PetriNetUnfolder]: 3517/5157 cut-off events. [2022-12-06 01:45:22,752 INFO L131 PetriNetUnfolder]: For 219/219 co-relation queries the response was YES. [2022-12-06 01:45:22,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30041 conditions, 5157 events. 3517/5157 cut-off events. For 219/219 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 23362 event pairs, 455 based on Foata normal form. 55/3776 useless extension candidates. Maximal degree in co-relation 29325. Up to 4619 conditions per place. [2022-12-06 01:45:22,778 INFO L137 encePairwiseOnDemand]: 33/46 looper letters, 245 selfloop transitions, 65 changer transitions 49/361 dead transitions. [2022-12-06 01:45:22,778 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 361 transitions, 4266 flow [2022-12-06 01:45:22,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-06 01:45:22,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-06 01:45:22,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 220 transitions. [2022-12-06 01:45:22,780 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.36789297658862874 [2022-12-06 01:45:22,782 INFO L294 CegarLoopForPetriNet]: 57 programPoint places, 20 predicate places. [2022-12-06 01:45:22,783 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-06 01:45:22,783 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 77 places, 361 transitions, 4266 flow [2022-12-06 01:45:22,813 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 77 places, 361 transitions, 4266 flow [2022-12-06 01:45:22,813 INFO L188 LiptonReduction]: Number of co-enabled transitions 474 [2022-12-06 01:45:22,816 INFO L203 LiptonReduction]: Total number of compositions: 0 [2022-12-06 01:45:22,819 INFO L143 eatedLiptonReduction]: Time needed for LBE in milliseconds: 37 [2022-12-06 01:45:22,819 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 361 transitions, 4266 flow [2022-12-06 01:45:22,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 01:45:22,819 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 01:45:22,819 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-06 01:45:22,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-06 01:45:22,819 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)] === [2022-12-06 01:45:22,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 01:45:22,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1017306663, now seen corresponding path program 1 times [2022-12-06 01:45:22,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 01:45:22,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796327228] [2022-12-06 01:45:22,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 01:45:22,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 01:45:22,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 01:45:23,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 01:45:23,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-06 01:45:23,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796327228] [2022-12-06 01:45:23,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796327228] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-06 01:45:23,585 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-06 01:45:23,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-12-06 01:45:23,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648520356] [2022-12-06 01:45:23,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-06 01:45:23,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-06 01:45:23,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-06 01:45:23,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-06 01:45:23,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2022-12-06 01:45:23,586 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 44 [2022-12-06 01:45:23,587 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 361 transitions, 4266 flow. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 01:45:23,587 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-06 01:45:23,587 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 44 [2022-12-06 01:45:23,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-06 01:45:25,720 INFO L130 PetriNetUnfolder]: 3641/5356 cut-off events. [2022-12-06 01:45:25,721 INFO L131 PetriNetUnfolder]: For 228/228 co-relation queries the response was YES. [2022-12-06 01:45:25,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36634 conditions, 5356 events. 3641/5356 cut-off events. For 228/228 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 24507 event pairs, 517 based on Foata normal form. 48/3960 useless extension candidates. Maximal degree in co-relation 35773. Up to 4821 conditions per place. [2022-12-06 01:45:25,748 INFO L137 encePairwiseOnDemand]: 28/44 looper letters, 384 selfloop transitions, 239 changer transitions 128/753 dead transitions. [2022-12-06 01:45:25,748 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 753 transitions, 10420 flow [2022-12-06 01:45:25,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-06 01:45:25,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-12-06 01:45:25,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 289 transitions. [2022-12-06 01:45:25,749 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.32840909090909093 [2022-12-06 01:45:25,750 INFO L294 CegarLoopForPetriNet]: 57 programPoint places, 39 predicate places. [2022-12-06 01:45:25,750 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-06 01:45:25,750 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 96 places, 753 transitions, 10420 flow [2022-12-06 01:45:25,783 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 96 places, 753 transitions, 10420 flow [2022-12-06 01:45:25,783 INFO L188 LiptonReduction]: Number of co-enabled transitions 574 [2022-12-06 01:45:25,787 INFO L203 LiptonReduction]: Total number of compositions: 0 [2022-12-06 01:45:25,792 INFO L143 eatedLiptonReduction]: Time needed for LBE in milliseconds: 42 [2022-12-06 01:45:25,792 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 753 transitions, 10420 flow [2022-12-06 01:45:25,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 01:45:25,792 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 01:45:25,792 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-06 01:45:25,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-06 01:45:25,793 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)] === [2022-12-06 01:45:25,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 01:45:25,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1902648829, now seen corresponding path program 2 times [2022-12-06 01:45:25,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 01:45:25,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254711997] [2022-12-06 01:45:25,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 01:45:25,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 01:45:25,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 01:45:26,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 01:45:26,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-06 01:45:26,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254711997] [2022-12-06 01:45:26,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254711997] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-06 01:45:26,436 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-06 01:45:26,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-12-06 01:45:26,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879818363] [2022-12-06 01:45:26,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-06 01:45:26,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-06 01:45:26,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-06 01:45:26,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-06 01:45:26,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-12-06 01:45:26,437 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 44 [2022-12-06 01:45:26,437 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 753 transitions, 10420 flow. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 01:45:26,437 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-06 01:45:26,437 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 44 [2022-12-06 01:45:26,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-06 01:45:28,987 INFO L130 PetriNetUnfolder]: 4199/6223 cut-off events. [2022-12-06 01:45:28,987 INFO L131 PetriNetUnfolder]: For 297/297 co-relation queries the response was YES. [2022-12-06 01:45:28,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48663 conditions, 6223 events. 4199/6223 cut-off events. For 297/297 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 29989 event pairs, 468 based on Foata normal form. 54/4609 useless extension candidates. Maximal degree in co-relation 47223. Up to 5587 conditions per place. [2022-12-06 01:45:29,021 INFO L137 encePairwiseOnDemand]: 28/44 looper letters, 528 selfloop transitions, 326 changer transitions 209/1065 dead transitions. [2022-12-06 01:45:29,022 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 1065 transitions, 16890 flow [2022-12-06 01:45:29,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-06 01:45:29,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-12-06 01:45:29,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 351 transitions. [2022-12-06 01:45:29,023 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.3468379446640316 [2022-12-06 01:45:29,024 INFO L294 CegarLoopForPetriNet]: 57 programPoint places, 61 predicate places. [2022-12-06 01:45:29,024 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-06 01:45:29,025 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 118 places, 1065 transitions, 16890 flow [2022-12-06 01:45:29,063 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 118 places, 1065 transitions, 16890 flow [2022-12-06 01:45:29,063 INFO L188 LiptonReduction]: Number of co-enabled transitions 792 [2022-12-06 01:45:29,068 INFO L203 LiptonReduction]: Total number of compositions: 0 [2022-12-06 01:45:29,070 INFO L143 eatedLiptonReduction]: Time needed for LBE in milliseconds: 46 [2022-12-06 01:45:29,070 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 1065 transitions, 16890 flow [2022-12-06 01:45:29,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 01:45:29,071 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 01:45:29,071 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-06 01:45:29,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-06 01:45:29,071 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)] === [2022-12-06 01:45:29,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 01:45:29,071 INFO L85 PathProgramCache]: Analyzing trace with hash -405102938, now seen corresponding path program 2 times [2022-12-06 01:45:29,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 01:45:29,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963888646] [2022-12-06 01:45:29,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 01:45:29,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 01:45:29,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 01:45:29,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 01:45:29,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-06 01:45:29,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963888646] [2022-12-06 01:45:29,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963888646] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-06 01:45:29,595 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-06 01:45:29,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-12-06 01:45:29,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625562546] [2022-12-06 01:45:29,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-06 01:45:29,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-06 01:45:29,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-06 01:45:29,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-06 01:45:29,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-12-06 01:45:29,597 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 44 [2022-12-06 01:45:29,597 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 1065 transitions, 16890 flow. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 01:45:29,597 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-06 01:45:29,597 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 44 [2022-12-06 01:45:29,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-06 01:45:31,387 INFO L130 PetriNetUnfolder]: 4927/7363 cut-off events. [2022-12-06 01:45:31,387 INFO L131 PetriNetUnfolder]: For 472/472 co-relation queries the response was YES. [2022-12-06 01:45:31,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64521 conditions, 7363 events. 4927/7363 cut-off events. For 472/472 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 37564 event pairs, 390 based on Foata normal form. 55/5476 useless extension candidates. Maximal degree in co-relation 62390. Up to 6564 conditions per place. [2022-12-06 01:45:31,420 INFO L137 encePairwiseOnDemand]: 28/44 looper letters, 749 selfloop transitions, 401 changer transitions 285/1437 dead transitions. [2022-12-06 01:45:31,421 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 1437 transitions, 25660 flow [2022-12-06 01:45:31,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-06 01:45:31,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-12-06 01:45:31,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 260 transitions. [2022-12-06 01:45:31,422 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.3939393939393939 [2022-12-06 01:45:31,422 INFO L294 CegarLoopForPetriNet]: 57 programPoint places, 75 predicate places. [2022-12-06 01:45:31,423 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-06 01:45:31,423 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 132 places, 1437 transitions, 25660 flow [2022-12-06 01:45:31,465 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 132 places, 1437 transitions, 25660 flow [2022-12-06 01:45:31,465 INFO L188 LiptonReduction]: Number of co-enabled transitions 1048 [2022-12-06 01:45:31,469 INFO L203 LiptonReduction]: Total number of compositions: 0 [2022-12-06 01:45:31,470 INFO L143 eatedLiptonReduction]: Time needed for LBE in milliseconds: 48 [2022-12-06 01:45:31,470 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 1437 transitions, 25660 flow [2022-12-06 01:45:31,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 01:45:31,470 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 01:45:31,470 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-06 01:45:31,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-06 01:45:31,471 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)] === [2022-12-06 01:45:31,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 01:45:31,471 INFO L85 PathProgramCache]: Analyzing trace with hash -9870608, now seen corresponding path program 3 times [2022-12-06 01:45:31,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 01:45:31,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532380983] [2022-12-06 01:45:31,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 01:45:31,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 01:45:31,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 01:45:31,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 01:45:31,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-06 01:45:31,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532380983] [2022-12-06 01:45:31,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532380983] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-06 01:45:31,983 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-06 01:45:31,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-12-06 01:45:31,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644296054] [2022-12-06 01:45:31,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-06 01:45:31,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-06 01:45:31,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-06 01:45:31,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-06 01:45:31,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-12-06 01:45:31,984 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 44 [2022-12-06 01:45:31,984 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 1437 transitions, 25660 flow. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 01:45:31,984 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-06 01:45:31,984 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 44 [2022-12-06 01:45:31,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-06 01:45:33,927 INFO L130 PetriNetUnfolder]: 5110/7638 cut-off events. [2022-12-06 01:45:33,927 INFO L131 PetriNetUnfolder]: For 377/377 co-relation queries the response was YES. [2022-12-06 01:45:33,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74531 conditions, 7638 events. 5110/7638 cut-off events. For 377/377 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 39374 event pairs, 395 based on Foata normal form. 55/5685 useless extension candidates. Maximal degree in co-relation 72171. Up to 6818 conditions per place. [2022-12-06 01:45:33,969 INFO L137 encePairwiseOnDemand]: 32/44 looper letters, 828 selfloop transitions, 386 changer transitions 312/1528 dead transitions. [2022-12-06 01:45:33,970 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 1528 transitions, 30324 flow [2022-12-06 01:45:33,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-06 01:45:33,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-06 01:45:33,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 209 transitions. [2022-12-06 01:45:33,971 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2022-12-06 01:45:33,971 INFO L294 CegarLoopForPetriNet]: 57 programPoint places, 86 predicate places. [2022-12-06 01:45:33,971 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-06 01:45:33,972 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 143 places, 1528 transitions, 30324 flow [2022-12-06 01:45:34,030 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 143 places, 1528 transitions, 30324 flow [2022-12-06 01:45:34,031 INFO L188 LiptonReduction]: Number of co-enabled transitions 1110 [2022-12-06 01:45:34,035 INFO L203 LiptonReduction]: Total number of compositions: 0 [2022-12-06 01:45:34,035 INFO L143 eatedLiptonReduction]: Time needed for LBE in milliseconds: 64 [2022-12-06 01:45:34,035 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 1528 transitions, 30324 flow [2022-12-06 01:45:34,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 01:45:34,036 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 01:45:34,036 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-06 01:45:34,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-06 01:45:34,036 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)] === [2022-12-06 01:45:34,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 01:45:34,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1801032168, now seen corresponding path program 4 times [2022-12-06 01:45:34,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 01:45:34,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127813824] [2022-12-06 01:45:34,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 01:45:34,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 01:45:34,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 01:45:34,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 01:45:34,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-06 01:45:34,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127813824] [2022-12-06 01:45:34,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127813824] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-06 01:45:34,581 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-06 01:45:34,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-12-06 01:45:34,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913146861] [2022-12-06 01:45:34,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-06 01:45:34,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-06 01:45:34,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-06 01:45:34,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-06 01:45:34,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-12-06 01:45:34,584 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 44 [2022-12-06 01:45:34,585 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 1528 transitions, 30324 flow. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 01:45:34,585 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-06 01:45:34,585 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 44 [2022-12-06 01:45:34,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-06 01:45:37,006 INFO L130 PetriNetUnfolder]: 5135/7697 cut-off events. [2022-12-06 01:45:37,006 INFO L131 PetriNetUnfolder]: For 429/429 co-relation queries the response was YES. [2022-12-06 01:45:37,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82698 conditions, 7697 events. 5135/7697 cut-off events. For 429/429 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 39824 event pairs, 545 based on Foata normal form. 55/5726 useless extension candidates. Maximal degree in co-relation 80107. Up to 6868 conditions per place. [2022-12-06 01:45:37,047 INFO L137 encePairwiseOnDemand]: 32/44 looper letters, 838 selfloop transitions, 387 changer transitions 337/1564 dead transitions. [2022-12-06 01:45:37,048 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 1564 transitions, 34158 flow [2022-12-06 01:45:37,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-06 01:45:37,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-12-06 01:45:37,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 252 transitions. [2022-12-06 01:45:37,052 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.38181818181818183 [2022-12-06 01:45:37,053 INFO L294 CegarLoopForPetriNet]: 57 programPoint places, 100 predicate places. [2022-12-06 01:45:37,053 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-06 01:45:37,053 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 157 places, 1564 transitions, 34158 flow [2022-12-06 01:45:37,114 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 157 places, 1564 transitions, 34158 flow [2022-12-06 01:45:37,114 INFO L188 LiptonReduction]: Number of co-enabled transitions 1140 [2022-12-06 01:45:37,120 INFO L203 LiptonReduction]: Total number of compositions: 0 [2022-12-06 01:45:37,120 INFO L143 eatedLiptonReduction]: Time needed for LBE in milliseconds: 67 [2022-12-06 01:45:37,120 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 1564 transitions, 34158 flow [2022-12-06 01:45:37,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 01:45:37,121 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 01:45:37,121 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-06 01:45:37,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-06 01:45:37,121 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION === [reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2022-12-06 01:45:37,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 01:45:37,122 INFO L85 PathProgramCache]: Analyzing trace with hash 373213967, now seen corresponding path program 3 times [2022-12-06 01:45:37,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 01:45:37,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028301012] [2022-12-06 01:45:37,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 01:45:37,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 01:45:37,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 01:45:37,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 01:45:37,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-06 01:45:37,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028301012] [2022-12-06 01:45:37,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028301012] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-06 01:45:37,760 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-06 01:45:37,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-12-06 01:45:37,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787542929] [2022-12-06 01:45:37,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-06 01:45:37,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-06 01:45:37,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-06 01:45:37,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-06 01:45:37,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-12-06 01:45:37,761 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 44 [2022-12-06 01:45:37,761 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 1564 transitions, 34158 flow. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 01:45:37,762 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-06 01:45:37,762 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 44 [2022-12-06 01:45:37,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-06 01:45:40,769 INFO L130 PetriNetUnfolder]: 6461/9709 cut-off events. [2022-12-06 01:45:40,770 INFO L131 PetriNetUnfolder]: For 623/623 co-relation queries the response was YES. [2022-12-06 01:45:40,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113588 conditions, 9709 events. 6461/9709 cut-off events. For 623/623 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 53331 event pairs, 761 based on Foata normal form. 48/7260 useless extension candidates. Maximal degree in co-relation 109790. Up to 8564 conditions per place. [2022-12-06 01:45:40,824 INFO L137 encePairwiseOnDemand]: 29/44 looper letters, 1282 selfloop transitions, 663 changer transitions 434/2381 dead transitions. [2022-12-06 01:45:40,824 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 2381 transitions, 56702 flow [2022-12-06 01:45:40,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-06 01:45:40,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-12-06 01:45:40,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 289 transitions. [2022-12-06 01:45:40,825 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.3456937799043062 [2022-12-06 01:45:40,825 INFO L294 CegarLoopForPetriNet]: 57 programPoint places, 118 predicate places. [2022-12-06 01:45:40,826 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-06 01:45:40,826 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 175 places, 2381 transitions, 56702 flow [2022-12-06 01:45:40,908 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 175 places, 2381 transitions, 56702 flow [2022-12-06 01:45:40,908 INFO L188 LiptonReduction]: Number of co-enabled transitions 1642 [2022-12-06 01:45:41,031 INFO L203 LiptonReduction]: Total number of compositions: 0 [2022-12-06 01:45:41,032 INFO L143 eatedLiptonReduction]: Time needed for LBE in milliseconds: 207 [2022-12-06 01:45:41,032 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 2381 transitions, 56702 flow [2022-12-06 01:45:41,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 01:45:41,032 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 01:45:41,032 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-06 01:45:41,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-06 01:45:41,032 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION === [reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2022-12-06 01:45:41,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 01:45:41,033 INFO L85 PathProgramCache]: Analyzing trace with hash 723741508, now seen corresponding path program 1 times [2022-12-06 01:45:41,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 01:45:41,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815341636] [2022-12-06 01:45:41,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 01:45:41,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 01:45:41,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 01:45:41,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 01:45:41,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-06 01:45:41,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815341636] [2022-12-06 01:45:41,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815341636] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-06 01:45:41,711 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-06 01:45:41,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-12-06 01:45:41,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754219735] [2022-12-06 01:45:41,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-06 01:45:41,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-06 01:45:41,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-06 01:45:41,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-06 01:45:41,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-12-06 01:45:41,714 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 44 [2022-12-06 01:45:41,714 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 2381 transitions, 56702 flow. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 01:45:41,714 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-06 01:45:41,714 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 44 [2022-12-06 01:45:41,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-06 01:45:44,983 INFO L130 PetriNetUnfolder]: 6874/10384 cut-off events. [2022-12-06 01:45:44,983 INFO L131 PetriNetUnfolder]: For 684/684 co-relation queries the response was YES. [2022-12-06 01:45:44,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131611 conditions, 10384 events. 6874/10384 cut-off events. For 684/684 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 58057 event pairs, 504 based on Foata normal form. 55/7828 useless extension candidates. Maximal degree in co-relation 127506. Up to 9141 conditions per place. [2022-12-06 01:45:45,038 INFO L137 encePairwiseOnDemand]: 28/44 looper letters, 1400 selfloop transitions, 835 changer transitions 486/2723 dead transitions. [2022-12-06 01:45:45,038 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 2723 transitions, 70256 flow [2022-12-06 01:45:45,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-06 01:45:45,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-06 01:45:45,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 190 transitions. [2022-12-06 01:45:45,039 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.3925619834710744 [2022-12-06 01:45:45,040 INFO L294 CegarLoopForPetriNet]: 57 programPoint places, 128 predicate places. [2022-12-06 01:45:45,040 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-06 01:45:45,040 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 185 places, 2723 transitions, 70256 flow [2022-12-06 01:45:45,255 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 185 places, 2723 transitions, 70256 flow [2022-12-06 01:45:45,256 INFO L188 LiptonReduction]: Number of co-enabled transitions 1882 Received shutdown request... [2022-12-06 01:53:37,281 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-12-06 01:53:38,292 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Cannot interrupt operation gracefully because timeout expired. Forcing shutdown