/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-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.repeated-lipton-a802222-m [2022-12-12 14:58:01,202 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-12 14:58:01,204 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-12 14:58:01,241 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-12 14:58:01,241 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-12 14:58:01,244 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-12 14:58:01,247 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-12 14:58:01,251 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-12 14:58:01,255 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-12 14:58:01,259 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-12 14:58:01,260 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-12 14:58:01,262 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-12 14:58:01,262 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-12 14:58:01,264 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-12 14:58:01,267 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-12 14:58:01,269 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-12 14:58:01,270 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-12 14:58:01,271 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-12 14:58:01,273 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-12 14:58:01,278 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-12 14:58:01,279 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-12 14:58:01,280 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-12 14:58:01,280 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-12 14:58:01,281 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-12 14:58:01,286 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-12 14:58:01,286 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-12 14:58:01,287 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-12 14:58:01,288 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-12 14:58:01,289 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-12 14:58:01,289 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-12 14:58:01,290 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-12 14:58:01,291 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-12 14:58:01,292 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-12 14:58:01,293 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-12 14:58:01,294 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-12 14:58:01,294 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-12 14:58:01,294 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-12 14:58:01,294 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-12 14:58:01,295 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-12 14:58:01,295 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-12 14:58:01,296 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-12 14:58:01,297 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-SemanticLbe.epf [2022-12-12 14:58:01,327 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-12 14:58:01,327 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-12 14:58:01,329 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-12 14:58:01,329 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-12 14:58:01,330 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-12 14:58:01,331 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-12 14:58:01,331 INFO L138 SettingsManager]: * Use SBE=true [2022-12-12 14:58:01,331 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-12 14:58:01,331 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-12 14:58:01,332 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-12 14:58:01,332 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-12 14:58:01,332 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-12 14:58:01,333 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-12 14:58:01,333 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-12 14:58:01,333 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-12 14:58:01,333 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-12 14:58:01,333 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-12 14:58:01,333 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-12 14:58:01,333 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-12 14:58:01,334 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-12 14:58:01,334 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-12 14:58:01,334 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-12-12 14:58:01,334 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-12 14:58:01,334 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-12 14:58:01,334 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-12 14:58:01,334 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-12 14:58:01,335 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-12 14:58:01,335 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-12 14:58:01,335 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-12 14:58:01,335 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-12 14:58:01,335 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-12-12 14:58:01,631 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-12 14:58:01,653 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-12 14:58:01,655 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-12 14:58:01,656 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-12 14:58:01,656 INFO L275 PluginConnector]: CDTParser initialized [2022-12-12 14:58:01,657 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i [2022-12-12 14:58:02,814 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-12 14:58:03,135 INFO L351 CDTParser]: Found 1 translation units. [2022-12-12 14:58:03,136 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i [2022-12-12 14:58:03,148 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/11bf7ddc9/ad52b6558f694d51b7171d08b69478c4/FLAG4850b8bae [2022-12-12 14:58:03,164 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/11bf7ddc9/ad52b6558f694d51b7171d08b69478c4 [2022-12-12 14:58:03,166 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-12 14:58:03,167 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-12-12 14:58:03,168 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-12 14:58:03,168 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-12 14:58:03,170 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-12 14:58:03,170 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.12 02:58:03" (1/1) ... [2022-12-12 14:58:03,171 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4797be51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 02:58:03, skipping insertion in model container [2022-12-12 14:58:03,171 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.12 02:58:03" (1/1) ... [2022-12-12 14:58:03,176 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-12 14:58:03,221 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-12 14:58:03,338 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-C-DAC/pthread-demo-datarace-1.i[820,833] [2022-12-12 14:58:03,635 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-12 14:58:03,645 INFO L203 MainTranslator]: Completed pre-run [2022-12-12 14:58:03,655 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-C-DAC/pthread-demo-datarace-1.i[820,833] [2022-12-12 14:58:03,692 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-12 14:58:03,781 INFO L208 MainTranslator]: Completed translation [2022-12-12 14:58:03,781 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 02:58:03 WrapperNode [2022-12-12 14:58:03,782 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-12 14:58:03,784 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-12 14:58:03,784 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-12 14:58:03,784 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-12 14:58:03,790 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 02:58:03" (1/1) ... [2022-12-12 14:58:03,824 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 02:58:03" (1/1) ... [2022-12-12 14:58:03,841 INFO L138 Inliner]: procedures = 364, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 62 [2022-12-12 14:58:03,841 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-12 14:58:03,842 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-12 14:58:03,842 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-12 14:58:03,842 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-12 14:58:03,849 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 02:58:03" (1/1) ... [2022-12-12 14:58:03,849 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 02:58:03" (1/1) ... [2022-12-12 14:58:03,855 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 02:58:03" (1/1) ... [2022-12-12 14:58:03,855 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 02:58:03" (1/1) ... [2022-12-12 14:58:03,866 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 02:58:03" (1/1) ... [2022-12-12 14:58:03,869 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 02:58:03" (1/1) ... [2022-12-12 14:58:03,877 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 02:58:03" (1/1) ... [2022-12-12 14:58:03,878 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 02:58:03" (1/1) ... [2022-12-12 14:58:03,880 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-12 14:58:03,881 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-12 14:58:03,881 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-12 14:58:03,881 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-12 14:58:03,882 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 02:58:03" (1/1) ... [2022-12-12 14:58:03,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-12 14:58:03,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 14:58:03,908 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) [2022-12-12 14:58:03,919 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 [2022-12-12 14:58:03,939 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-12 14:58:03,939 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-12 14:58:03,939 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-12 14:58:03,939 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-12 14:58:03,939 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-12-12 14:58:03,940 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-12 14:58:03,940 INFO L130 BoogieDeclarations]: Found specification of procedure thread_function_mutex [2022-12-12 14:58:03,940 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_function_mutex [2022-12-12 14:58:03,940 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-12 14:58:03,940 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-12 14:58:03,940 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-12 14:58:03,941 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2022-12-12 14:58:04,056 INFO L236 CfgBuilder]: Building ICFG [2022-12-12 14:58:04,058 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-12 14:58:04,247 INFO L277 CfgBuilder]: Performing block encoding [2022-12-12 14:58:04,253 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-12 14:58:04,253 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-12 14:58:04,259 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.12 02:58:04 BoogieIcfgContainer [2022-12-12 14:58:04,259 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-12 14:58:04,261 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-12 14:58:04,261 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-12 14:58:04,264 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-12 14:58:04,264 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.12 02:58:03" (1/3) ... [2022-12-12 14:58:04,264 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67d441c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.12 02:58:04, skipping insertion in model container [2022-12-12 14:58:04,264 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 02:58:03" (2/3) ... [2022-12-12 14:58:04,265 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67d441c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.12 02:58:04, skipping insertion in model container [2022-12-12 14:58:04,265 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.12 02:58:04" (3/3) ... [2022-12-12 14:58:04,266 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-demo-datarace-1.i [2022-12-12 14:58:04,282 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-12 14:58:04,282 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-12 14:58:04,282 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-12 14:58:04,354 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-12-12 14:58:04,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 83 places, 86 transitions, 180 flow [2022-12-12 14:58:04,440 INFO L130 PetriNetUnfolder]: 7/85 cut-off events. [2022-12-12 14:58:04,440 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-12 14:58:04,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90 conditions, 85 events. 7/85 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 82 event pairs, 0 based on Foata normal form. 0/77 useless extension candidates. Maximal degree in co-relation 38. Up to 2 conditions per place. [2022-12-12 14:58:04,444 INFO L82 GeneralOperation]: Start removeDead. Operand has 83 places, 86 transitions, 180 flow [2022-12-12 14:58:04,447 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 75 places, 77 transitions, 160 flow [2022-12-12 14:58:04,449 INFO L203 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-12 14:58:04,466 INFO L174 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 75 places, 77 transitions, 160 flow [2022-12-12 14:58:04,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 75 places, 77 transitions, 160 flow [2022-12-12 14:58:04,499 INFO L130 PetriNetUnfolder]: 6/77 cut-off events. [2022-12-12 14:58:04,499 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-12 14:58:04,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82 conditions, 77 events. 6/77 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 77 event pairs, 0 based on Foata normal form. 0/71 useless extension candidates. Maximal degree in co-relation 38. Up to 2 conditions per place. [2022-12-12 14:58:04,502 INFO L222 LiptonReduction]: Starting Lipton reduction on Petri net that has 75 places, 77 transitions, 160 flow [2022-12-12 14:58:04,502 INFO L226 LiptonReduction]: Number of co-enabled transitions 722 [2022-12-12 14:58:06,358 INFO L241 LiptonReduction]: Total number of compositions: 62 [2022-12-12 14:58:06,371 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-12 14:58:06,376 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@75aae5d8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-12 14:58:06,376 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-12 14:58:06,380 INFO L130 PetriNetUnfolder]: 2/14 cut-off events. [2022-12-12 14:58:06,380 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-12 14:58:06,380 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 14:58:06,381 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 14:58:06,381 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 14:58:06,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 14:58:06,385 INFO L85 PathProgramCache]: Analyzing trace with hash 89472530, now seen corresponding path program 1 times [2022-12-12 14:58:06,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 14:58:06,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762461239] [2022-12-12 14:58:06,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 14:58:06,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 14:58:06,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 14:58:06,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 14:58:06,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 14:58:06,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762461239] [2022-12-12 14:58:06,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762461239] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 14:58:06,582 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 14:58:06,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-12 14:58:06,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849952027] [2022-12-12 14:58:06,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 14:58:06,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-12 14:58:06,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 14:58:06,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-12 14:58:06,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-12 14:58:06,606 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 15 [2022-12-12 14:58:06,608 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 17 places, 15 transitions, 36 flow. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 14:58:06,608 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 14:58:06,608 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 15 [2022-12-12 14:58:06,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 14:58:06,649 INFO L130 PetriNetUnfolder]: 41/86 cut-off events. [2022-12-12 14:58:06,650 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-12 14:58:06,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 176 conditions, 86 events. 41/86 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 206 event pairs, 15 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 162. Up to 53 conditions per place. [2022-12-12 14:58:06,651 INFO L137 encePairwiseOnDemand]: 12/15 looper letters, 20 selfloop transitions, 2 changer transitions 0/23 dead transitions. [2022-12-12 14:58:06,651 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 19 places, 23 transitions, 96 flow [2022-12-12 14:58:06,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-12 14:58:06,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-12 14:58:06,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 26 transitions. [2022-12-12 14:58:06,662 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5777777777777777 [2022-12-12 14:58:06,663 INFO L175 Difference]: Start difference. First operand has 17 places, 15 transitions, 36 flow. Second operand 3 states and 26 transitions. [2022-12-12 14:58:06,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 19 places, 23 transitions, 96 flow [2022-12-12 14:58:06,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 17 places, 23 transitions, 92 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-12 14:58:06,667 INFO L231 Difference]: Finished difference. Result has 18 places, 16 transitions, 44 flow [2022-12-12 14:58:06,668 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=32, PETRI_DIFFERENCE_MINUEND_PLACES=15, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=44, PETRI_PLACES=18, PETRI_TRANSITIONS=16} [2022-12-12 14:58:06,671 INFO L295 CegarLoopForPetriNet]: 17 programPoint places, 1 predicate places. [2022-12-12 14:58:06,671 INFO L495 AbstractCegarLoop]: Abstraction has has 18 places, 16 transitions, 44 flow [2022-12-12 14:58:06,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 14:58:06,672 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 14:58:06,672 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 14:58:06,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-12 14:58:06,672 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 14:58:06,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 14:58:06,673 INFO L85 PathProgramCache]: Analyzing trace with hash -683595234, now seen corresponding path program 1 times [2022-12-12 14:58:06,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 14:58:06,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438224968] [2022-12-12 14:58:06,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 14:58:06,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 14:58:06,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 14:58:06,734 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 14:58:06,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 14:58:06,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438224968] [2022-12-12 14:58:06,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438224968] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 14:58:06,735 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 14:58:06,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-12 14:58:06,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990505632] [2022-12-12 14:58:06,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 14:58:06,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-12 14:58:06,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 14:58:06,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-12 14:58:06,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-12 14:58:06,737 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 15 [2022-12-12 14:58:06,738 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 16 transitions, 44 flow. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 14:58:06,738 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 14:58:06,738 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 15 [2022-12-12 14:58:06,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 14:58:06,795 INFO L130 PetriNetUnfolder]: 61/143 cut-off events. [2022-12-12 14:58:06,796 INFO L131 PetriNetUnfolder]: For 28/28 co-relation queries the response was YES. [2022-12-12 14:58:06,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 302 conditions, 143 events. 61/143 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 496 event pairs, 27 based on Foata normal form. 0/133 useless extension candidates. Maximal degree in co-relation 92. Up to 85 conditions per place. [2022-12-12 14:58:06,799 INFO L137 encePairwiseOnDemand]: 12/15 looper letters, 22 selfloop transitions, 2 changer transitions 0/25 dead transitions. [2022-12-12 14:58:06,799 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 25 transitions, 120 flow [2022-12-12 14:58:06,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-12 14:58:06,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-12 14:58:06,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 26 transitions. [2022-12-12 14:58:06,802 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5777777777777777 [2022-12-12 14:58:06,802 INFO L175 Difference]: Start difference. First operand has 18 places, 16 transitions, 44 flow. Second operand 3 states and 26 transitions. [2022-12-12 14:58:06,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 25 transitions, 120 flow [2022-12-12 14:58:06,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 25 transitions, 116 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-12 14:58:06,803 INFO L231 Difference]: Finished difference. Result has 20 places, 17 transitions, 54 flow [2022-12-12 14:58:06,803 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=54, PETRI_PLACES=20, PETRI_TRANSITIONS=17} [2022-12-12 14:58:06,804 INFO L295 CegarLoopForPetriNet]: 17 programPoint places, 3 predicate places. [2022-12-12 14:58:06,804 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 17 transitions, 54 flow [2022-12-12 14:58:06,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 14:58:06,804 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 14:58:06,805 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 14:58:06,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-12 14:58:06,805 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 14:58:06,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 14:58:06,806 INFO L85 PathProgramCache]: Analyzing trace with hash 468442048, now seen corresponding path program 1 times [2022-12-12 14:58:06,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 14:58:06,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271733316] [2022-12-12 14:58:06,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 14:58:06,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 14:58:06,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 14:58:06,924 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 14:58:06,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 14:58:06,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271733316] [2022-12-12 14:58:06,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271733316] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 14:58:06,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402925363] [2022-12-12 14:58:06,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 14:58:06,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 14:58:06,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 14:58:06,931 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 14:58:06,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-12 14:58:07,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 14:58:07,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-12 14:58:07,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 14:58:07,122 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 14:58:07,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 14:58:07,143 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 14:58:07,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402925363] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 14:58:07,143 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 14:58:07,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-12-12 14:58:07,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093693250] [2022-12-12 14:58:07,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 14:58:07,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-12 14:58:07,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 14:58:07,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-12 14:58:07,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-12 14:58:07,145 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 15 [2022-12-12 14:58:07,145 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 17 transitions, 54 flow. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 14:58:07,145 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 14:58:07,145 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 15 [2022-12-12 14:58:07,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 14:58:07,285 INFO L130 PetriNetUnfolder]: 111/264 cut-off events. [2022-12-12 14:58:07,286 INFO L131 PetriNetUnfolder]: For 113/113 co-relation queries the response was YES. [2022-12-12 14:58:07,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 608 conditions, 264 events. 111/264 cut-off events. For 113/113 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 930 event pairs, 18 based on Foata normal form. 30/294 useless extension candidates. Maximal degree in co-relation 198. Up to 55 conditions per place. [2022-12-12 14:58:07,288 INFO L137 encePairwiseOnDemand]: 11/15 looper letters, 44 selfloop transitions, 6 changer transitions 0/51 dead transitions. [2022-12-12 14:58:07,288 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 51 transitions, 258 flow [2022-12-12 14:58:07,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-12 14:58:07,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-12 14:58:07,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 54 transitions. [2022-12-12 14:58:07,290 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.6 [2022-12-12 14:58:07,290 INFO L175 Difference]: Start difference. First operand has 20 places, 17 transitions, 54 flow. Second operand 6 states and 54 transitions. [2022-12-12 14:58:07,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 51 transitions, 258 flow [2022-12-12 14:58:07,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 51 transitions, 256 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-12 14:58:07,291 INFO L231 Difference]: Finished difference. Result has 28 places, 20 transitions, 92 flow [2022-12-12 14:58:07,292 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=92, PETRI_PLACES=28, PETRI_TRANSITIONS=20} [2022-12-12 14:58:07,292 INFO L295 CegarLoopForPetriNet]: 17 programPoint places, 11 predicate places. [2022-12-12 14:58:07,292 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 20 transitions, 92 flow [2022-12-12 14:58:07,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 14:58:07,293 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 14:58:07,293 INFO L214 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 14:58:07,310 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-12 14:58:07,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 14:58:07,498 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 14:58:07,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 14:58:07,498 INFO L85 PathProgramCache]: Analyzing trace with hash 2064556268, now seen corresponding path program 2 times [2022-12-12 14:58:07,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 14:58:07,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086729166] [2022-12-12 14:58:07,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 14:58:07,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 14:58:07,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 14:58:07,581 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-12 14:58:07,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 14:58:07,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086729166] [2022-12-12 14:58:07,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086729166] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 14:58:07,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96214305] [2022-12-12 14:58:07,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 14:58:07,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 14:58:07,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 14:58:07,584 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 14:58:07,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-12 14:58:07,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 14:58:07,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 14:58:07,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-12 14:58:07,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 14:58:07,737 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 14:58:07,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 14:58:07,813 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 14:58:07,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96214305] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 14:58:07,814 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 14:58:07,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2022-12-12 14:58:07,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246274274] [2022-12-12 14:58:07,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 14:58:07,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-12 14:58:07,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 14:58:07,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-12 14:58:07,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-12-12 14:58:07,818 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 15 [2022-12-12 14:58:07,818 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 20 transitions, 92 flow. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 14:58:07,818 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 14:58:07,818 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 15 [2022-12-12 14:58:07,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 14:58:08,275 INFO L130 PetriNetUnfolder]: 323/748 cut-off events. [2022-12-12 14:58:08,276 INFO L131 PetriNetUnfolder]: For 1511/1511 co-relation queries the response was YES. [2022-12-12 14:58:08,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2276 conditions, 748 events. 323/748 cut-off events. For 1511/1511 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3109 event pairs, 10 based on Foata normal form. 107/855 useless extension candidates. Maximal degree in co-relation 588. Up to 168 conditions per place. [2022-12-12 14:58:08,283 INFO L137 encePairwiseOnDemand]: 8/15 looper letters, 158 selfloop transitions, 69 changer transitions 0/228 dead transitions. [2022-12-12 14:58:08,283 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 228 transitions, 1346 flow [2022-12-12 14:58:08,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-12-12 14:58:08,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-12-12 14:58:08,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 290 transitions. [2022-12-12 14:58:08,286 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5686274509803921 [2022-12-12 14:58:08,286 INFO L175 Difference]: Start difference. First operand has 28 places, 20 transitions, 92 flow. Second operand 34 states and 290 transitions. [2022-12-12 14:58:08,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 228 transitions, 1346 flow [2022-12-12 14:58:08,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 228 transitions, 1286 flow, removed 27 selfloop flow, removed 1 redundant places. [2022-12-12 14:58:08,298 INFO L231 Difference]: Finished difference. Result has 85 places, 82 transitions, 724 flow [2022-12-12 14:58:08,298 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=724, PETRI_PLACES=85, PETRI_TRANSITIONS=82} [2022-12-12 14:58:08,304 INFO L295 CegarLoopForPetriNet]: 17 programPoint places, 68 predicate places. [2022-12-12 14:58:08,304 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 82 transitions, 724 flow [2022-12-12 14:58:08,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 14:58:08,304 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 14:58:08,304 INFO L214 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 14:58:08,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-12 14:58:08,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-12-12 14:58:08,511 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 14:58:08,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 14:58:08,511 INFO L85 PathProgramCache]: Analyzing trace with hash 614689770, now seen corresponding path program 3 times [2022-12-12 14:58:08,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 14:58:08,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010294743] [2022-12-12 14:58:08,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 14:58:08,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 14:58:08,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 14:58:08,648 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-12-12 14:58:08,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 14:58:08,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010294743] [2022-12-12 14:58:08,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010294743] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 14:58:08,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788941132] [2022-12-12 14:58:08,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 14:58:08,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 14:58:08,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 14:58:08,651 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 14:58:08,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-12 14:58:08,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-12 14:58:08,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 14:58:08,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-12 14:58:08,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 14:58:08,819 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-12-12 14:58:08,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 14:58:08,905 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-12-12 14:58:08,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788941132] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 14:58:08,905 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 14:58:08,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-12-12 14:58:08,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548883207] [2022-12-12 14:58:08,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 14:58:08,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-12 14:58:08,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 14:58:08,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-12 14:58:08,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-12-12 14:58:08,907 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 15 [2022-12-12 14:58:08,907 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 82 transitions, 724 flow. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 14:58:08,907 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 14:58:08,907 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 15 [2022-12-12 14:58:08,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 14:58:09,141 INFO L130 PetriNetUnfolder]: 622/1302 cut-off events. [2022-12-12 14:58:09,141 INFO L131 PetriNetUnfolder]: For 19882/19882 co-relation queries the response was YES. [2022-12-12 14:58:09,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6869 conditions, 1302 events. 622/1302 cut-off events. For 19882/19882 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 6262 event pairs, 84 based on Foata normal form. 92/1394 useless extension candidates. Maximal degree in co-relation 5483. Up to 324 conditions per place. [2022-12-12 14:58:09,156 INFO L137 encePairwiseOnDemand]: 11/15 looper letters, 128 selfloop transitions, 38 changer transitions 0/167 dead transitions. [2022-12-12 14:58:09,156 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 167 transitions, 1986 flow [2022-12-12 14:58:09,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-12 14:58:09,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-12 14:58:09,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 71 transitions. [2022-12-12 14:58:09,158 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5916666666666667 [2022-12-12 14:58:09,158 INFO L175 Difference]: Start difference. First operand has 85 places, 82 transitions, 724 flow. Second operand 8 states and 71 transitions. [2022-12-12 14:58:09,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 167 transitions, 1986 flow [2022-12-12 14:58:09,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 167 transitions, 1900 flow, removed 11 selfloop flow, removed 4 redundant places. [2022-12-12 14:58:09,191 INFO L231 Difference]: Finished difference. Result has 93 places, 86 transitions, 860 flow [2022-12-12 14:58:09,191 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=662, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=860, PETRI_PLACES=93, PETRI_TRANSITIONS=86} [2022-12-12 14:58:09,192 INFO L295 CegarLoopForPetriNet]: 17 programPoint places, 76 predicate places. [2022-12-12 14:58:09,192 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 86 transitions, 860 flow [2022-12-12 14:58:09,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 14:58:09,192 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 14:58:09,192 INFO L214 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 14:58:09,198 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-12 14:58:09,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 14:58:09,398 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 14:58:09,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 14:58:09,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1406674066, now seen corresponding path program 4 times [2022-12-12 14:58:09,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 14:58:09,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239477584] [2022-12-12 14:58:09,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 14:58:09,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 14:58:09,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 14:58:09,643 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 10 proven. 66 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-12-12 14:58:09,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 14:58:09,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239477584] [2022-12-12 14:58:09,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239477584] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 14:58:09,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998275475] [2022-12-12 14:58:09,644 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 14:58:09,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 14:58:09,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 14:58:09,646 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 14:58:09,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-12 14:58:09,795 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 14:58:09,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 14:58:09,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-12 14:58:09,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 14:58:09,871 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 10 proven. 66 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-12-12 14:58:09,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 14:58:09,996 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 10 proven. 66 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-12-12 14:58:09,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998275475] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 14:58:09,996 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 14:58:09,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-12-12 14:58:09,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940746683] [2022-12-12 14:58:09,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 14:58:09,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-12 14:58:09,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 14:58:09,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-12 14:58:09,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-12-12 14:58:09,998 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 15 [2022-12-12 14:58:09,998 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 86 transitions, 860 flow. Second operand has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 14:58:09,998 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 14:58:09,998 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 15 [2022-12-12 14:58:09,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 14:58:10,555 INFO L130 PetriNetUnfolder]: 1358/2774 cut-off events. [2022-12-12 14:58:10,556 INFO L131 PetriNetUnfolder]: For 52612/52612 co-relation queries the response was YES. [2022-12-12 14:58:10,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16291 conditions, 2774 events. 1358/2774 cut-off events. For 52612/52612 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 14460 event pairs, 84 based on Foata normal form. 184/2958 useless extension candidates. Maximal degree in co-relation 13086. Up to 708 conditions per place. [2022-12-12 14:58:10,633 INFO L137 encePairwiseOnDemand]: 11/15 looper letters, 272 selfloop transitions, 46 changer transitions 0/319 dead transitions. [2022-12-12 14:58:10,634 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 319 transitions, 3996 flow [2022-12-12 14:58:10,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-12 14:58:10,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-12-12 14:58:10,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 147 transitions. [2022-12-12 14:58:10,636 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.6125 [2022-12-12 14:58:10,636 INFO L175 Difference]: Start difference. First operand has 93 places, 86 transitions, 860 flow. Second operand 16 states and 147 transitions. [2022-12-12 14:58:10,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 319 transitions, 3996 flow [2022-12-12 14:58:10,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 319 transitions, 3832 flow, removed 60 selfloop flow, removed 2 redundant places. [2022-12-12 14:58:10,692 INFO L231 Difference]: Finished difference. Result has 115 places, 95 transitions, 1082 flow [2022-12-12 14:58:10,692 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=776, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1082, PETRI_PLACES=115, PETRI_TRANSITIONS=95} [2022-12-12 14:58:10,693 INFO L295 CegarLoopForPetriNet]: 17 programPoint places, 98 predicate places. [2022-12-12 14:58:10,693 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 95 transitions, 1082 flow [2022-12-12 14:58:10,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 14:58:10,693 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 14:58:10,693 INFO L214 CegarLoopForPetriNet]: trace histogram [14, 14, 14, 14, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 14:58:10,702 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-12 14:58:10,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 14:58:10,899 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 14:58:10,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 14:58:10,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1510009216, now seen corresponding path program 5 times [2022-12-12 14:58:10,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 14:58:10,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688196814] [2022-12-12 14:58:10,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 14:58:10,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 14:58:10,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 14:58:11,389 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-12-12 14:58:11,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 14:58:11,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688196814] [2022-12-12 14:58:11,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688196814] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 14:58:11,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427676064] [2022-12-12 14:58:11,390 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 14:58:11,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 14:58:11,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 14:58:11,392 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 14:58:11,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-12 14:58:11,582 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2022-12-12 14:58:11,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 14:58:11,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-12 14:58:11,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 14:58:11,746 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 14 proven. 145 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-12-12 14:58:11,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 14:58:12,003 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 14 proven. 145 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-12-12 14:58:12,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427676064] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 14:58:12,004 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 14:58:12,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 13] total 37 [2022-12-12 14:58:12,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505058612] [2022-12-12 14:58:12,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 14:58:12,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-12-12 14:58:12,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 14:58:12,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-12-12 14:58:12,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=366, Invalid=966, Unknown=0, NotChecked=0, Total=1332 [2022-12-12 14:58:12,005 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 15 [2022-12-12 14:58:12,006 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 95 transitions, 1082 flow. Second operand has 37 states, 37 states have (on average 4.081081081081081) internal successors, (151), 37 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 14:58:12,006 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 14:58:12,006 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 15 [2022-12-12 14:58:12,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 14:58:25,366 INFO L130 PetriNetUnfolder]: 2839/5880 cut-off events. [2022-12-12 14:58:25,366 INFO L131 PetriNetUnfolder]: For 235464/235464 co-relation queries the response was YES. [2022-12-12 14:58:25,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32965 conditions, 5880 events. 2839/5880 cut-off events. For 235464/235464 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 35028 event pairs, 10 based on Foata normal form. 703/6583 useless extension candidates. Maximal degree in co-relation 30511. Up to 1452 conditions per place. [2022-12-12 14:58:25,425 INFO L137 encePairwiseOnDemand]: 8/15 looper letters, 1390 selfloop transitions, 718 changer transitions 0/2109 dead transitions. [2022-12-12 14:58:25,425 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 2109 transitions, 23792 flow [2022-12-12 14:58:25,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 337 states. [2022-12-12 14:58:25,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 337 states. [2022-12-12 14:58:25,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 2596 transitions. [2022-12-12 14:58:25,437 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5135509396636994 [2022-12-12 14:58:25,437 INFO L175 Difference]: Start difference. First operand has 115 places, 95 transitions, 1082 flow. Second operand 337 states and 2596 transitions. [2022-12-12 14:58:25,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 2109 transitions, 23792 flow [2022-12-12 14:58:25,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 2109 transitions, 23532 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-12-12 14:58:25,686 INFO L231 Difference]: Finished difference. Result has 632 places, 756 transitions, 13786 flow [2022-12-12 14:58:25,686 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=1022, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=337, PETRI_FLOW=13786, PETRI_PLACES=632, PETRI_TRANSITIONS=756} [2022-12-12 14:58:25,687 INFO L295 CegarLoopForPetriNet]: 17 programPoint places, 615 predicate places. [2022-12-12 14:58:25,687 INFO L495 AbstractCegarLoop]: Abstraction has has 632 places, 756 transitions, 13786 flow [2022-12-12 14:58:25,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 4.081081081081081) internal successors, (151), 37 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 14:58:25,688 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 14:58:25,688 INFO L214 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 14:58:25,702 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-12 14:58:25,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 14:58:25,894 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 14:58:25,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 14:58:25,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1950423628, now seen corresponding path program 6 times [2022-12-12 14:58:25,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 14:58:25,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439371591] [2022-12-12 14:58:25,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 14:58:25,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 14:58:25,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 14:58:26,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1025 backedges. 20 proven. 435 refuted. 0 times theorem prover too weak. 570 trivial. 0 not checked. [2022-12-12 14:58:26,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 14:58:26,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439371591] [2022-12-12 14:58:26,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439371591] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 14:58:26,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712399960] [2022-12-12 14:58:26,440 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 14:58:26,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 14:58:26,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 14:58:26,444 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 14:58:26,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-12 14:58:26,968 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2022-12-12 14:58:26,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 14:58:26,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 681 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-12 14:58:26,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 14:58:27,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1025 backedges. 20 proven. 435 refuted. 0 times theorem prover too weak. 570 trivial. 0 not checked. [2022-12-12 14:58:27,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 14:58:27,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1025 backedges. 20 proven. 435 refuted. 0 times theorem prover too weak. 570 trivial. 0 not checked. [2022-12-12 14:58:27,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712399960] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 14:58:27,484 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 14:58:27,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 23 [2022-12-12 14:58:27,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988226884] [2022-12-12 14:58:27,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 14:58:27,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-12 14:58:27,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 14:58:27,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-12 14:58:27,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2022-12-12 14:58:27,485 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 15 [2022-12-12 14:58:27,485 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 632 places, 756 transitions, 13786 flow. Second operand has 23 states, 23 states have (on average 5.173913043478261) internal successors, (119), 23 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 14:58:27,486 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 14:58:27,486 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 15 [2022-12-12 14:58:27,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 14:58:31,254 INFO L130 PetriNetUnfolder]: 3570/7246 cut-off events. [2022-12-12 14:58:31,255 INFO L131 PetriNetUnfolder]: For 1751500/1751502 co-relation queries the response was YES. [2022-12-12 14:58:31,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70441 conditions, 7246 events. 3570/7246 cut-off events. For 1751500/1751502 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 44155 event pairs, 149 based on Foata normal form. 217/7463 useless extension candidates. Maximal degree in co-relation 67048. Up to 1826 conditions per place. [2022-12-12 14:58:31,549 INFO L137 encePairwiseOnDemand]: 11/15 looper letters, 611 selfloop transitions, 472 changer transitions 0/1084 dead transitions. [2022-12-12 14:58:31,549 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 653 places, 1084 transitions, 28042 flow [2022-12-12 14:58:31,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-12 14:58:31,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-12-12 14:58:31,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 198 transitions. [2022-12-12 14:58:31,552 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.6 [2022-12-12 14:58:31,552 INFO L175 Difference]: Start difference. First operand has 632 places, 756 transitions, 13786 flow. Second operand 22 states and 198 transitions. [2022-12-12 14:58:31,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 653 places, 1084 transitions, 28042 flow [2022-12-12 14:58:40,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 615 places, 1084 transitions, 23628 flow, removed 1755 selfloop flow, removed 38 redundant places. [2022-12-12 14:58:40,391 INFO L231 Difference]: Finished difference. Result has 621 places, 841 transitions, 12876 flow [2022-12-12 14:58:40,391 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=9462, PETRI_DIFFERENCE_MINUEND_PLACES=594, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=756, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=387, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=12876, PETRI_PLACES=621, PETRI_TRANSITIONS=841} [2022-12-12 14:58:40,392 INFO L295 CegarLoopForPetriNet]: 17 programPoint places, 604 predicate places. [2022-12-12 14:58:40,392 INFO L495 AbstractCegarLoop]: Abstraction has has 621 places, 841 transitions, 12876 flow [2022-12-12 14:58:40,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.173913043478261) internal successors, (119), 23 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 14:58:40,392 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 14:58:40,392 INFO L214 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 14:58:40,398 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-12 14:58:40,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 14:58:40,594 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 14:58:40,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 14:58:40,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1511874564, now seen corresponding path program 7 times [2022-12-12 14:58:40,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 14:58:40,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407084375] [2022-12-12 14:58:40,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 14:58:40,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 14:58:40,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 14:58:43,772 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 14:58:43,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 14:58:43,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407084375] [2022-12-12 14:58:43,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407084375] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 14:58:43,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343338381] [2022-12-12 14:58:43,772 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-12 14:58:43,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 14:58:43,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 14:58:43,775 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 14:58:43,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-12 14:58:43,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 14:58:43,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 776 conjuncts, 128 conjunts are in the unsatisfiable core [2022-12-12 14:58:43,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 14:58:44,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 14:58:44,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 14:58:44,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 14:58:44,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343338381] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 14:58:44,861 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 14:58:44,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 61 [2022-12-12 14:58:44,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264857372] [2022-12-12 14:58:44,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 14:58:44,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-12-12 14:58:44,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 14:58:44,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-12-12 14:58:44,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2022-12-12 14:58:44,866 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-12 14:58:44,867 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 621 places, 841 transitions, 12876 flow. Second operand has 63 states, 62 states have (on average 2.3870967741935485) internal successors, (148), 62 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 14:58:44,867 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 14:58:44,867 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-12 14:58:44,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:00:29,811 INFO L130 PetriNetUnfolder]: 34486/68977 cut-off events. [2022-12-12 15:00:29,811 INFO L131 PetriNetUnfolder]: For 118883878/118883878 co-relation queries the response was YES. [2022-12-12 15:00:33,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1684920 conditions, 68977 events. 34486/68977 cut-off events. For 118883878/118883878 co-relation queries the response was YES. Maximal size of possible extension queue 993. Compared 613780 event pairs, 2167 based on Foata normal form. 1/68978 useless extension candidates. Maximal degree in co-relation 1679185. Up to 16121 conditions per place. [2022-12-12 15:00:34,128 INFO L137 encePairwiseOnDemand]: 10/15 looper letters, 9624 selfloop transitions, 793 changer transitions 1/10418 dead transitions. [2022-12-12 15:00:34,128 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 913 places, 10418 transitions, 261958 flow [2022-12-12 15:00:34,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 293 states. [2022-12-12 15:00:34,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 293 states. [2022-12-12 15:00:34,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 2269 transitions. [2022-12-12 15:00:34,164 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.516268486916951 [2022-12-12 15:00:34,164 INFO L175 Difference]: Start difference. First operand has 621 places, 841 transitions, 12876 flow. Second operand 293 states and 2269 transitions. [2022-12-12 15:00:34,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 913 places, 10418 transitions, 261958 flow Received shutdown request... [2022-12-12 15:09:59,259 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 [2022-12-12 15:09:59,259 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-12-12 15:10:00,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 [2022-12-12 15:10:00,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 Cannot interrupt operation gracefully because timeout expired. Forcing shutdown