/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-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread/fib_unsafe-5.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-?-0612a5f-m [2022-09-20 20:14:58,610 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-09-20 20:14:58,612 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-09-20 20:14:58,641 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-09-20 20:14:58,642 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-09-20 20:14:58,642 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-09-20 20:14:58,648 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-09-20 20:14:58,651 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-09-20 20:14:58,652 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-09-20 20:14:58,655 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-09-20 20:14:58,657 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-09-20 20:14:58,659 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-09-20 20:14:58,659 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-09-20 20:14:58,661 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-09-20 20:14:58,662 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-09-20 20:14:58,662 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-09-20 20:14:58,663 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-09-20 20:14:58,664 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-09-20 20:14:58,668 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-09-20 20:14:58,672 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-09-20 20:14:58,672 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-09-20 20:14:58,674 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-09-20 20:14:58,675 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-09-20 20:14:58,676 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-09-20 20:14:58,680 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-09-20 20:14:58,680 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-09-20 20:14:58,680 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-09-20 20:14:58,681 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-09-20 20:14:58,681 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-09-20 20:14:58,681 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-09-20 20:14:58,682 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-09-20 20:14:58,682 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-09-20 20:14:58,682 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-09-20 20:14:58,683 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-09-20 20:14:58,687 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-09-20 20:14:58,687 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-09-20 20:14:58,688 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-09-20 20:14:58,688 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-09-20 20:14:58,688 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-09-20 20:14:58,689 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-09-20 20:14:58,689 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-09-20 20:14:58,690 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-NoLbe.epf [2022-09-20 20:14:58,712 INFO L113 SettingsManager]: Loading preferences was successful [2022-09-20 20:14:58,713 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-09-20 20:14:58,714 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-09-20 20:14:58,714 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-09-20 20:14:58,715 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-09-20 20:14:58,715 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-09-20 20:14:58,715 INFO L138 SettingsManager]: * Use SBE=true [2022-09-20 20:14:58,715 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-09-20 20:14:58,715 INFO L138 SettingsManager]: * sizeof long=4 [2022-09-20 20:14:58,715 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-09-20 20:14:58,716 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-09-20 20:14:58,716 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-09-20 20:14:58,716 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-09-20 20:14:58,716 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-09-20 20:14:58,716 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-09-20 20:14:58,716 INFO L138 SettingsManager]: * sizeof long double=12 [2022-09-20 20:14:58,716 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-09-20 20:14:58,716 INFO L138 SettingsManager]: * Use constant arrays=true [2022-09-20 20:14:58,717 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-09-20 20:14:58,717 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-09-20 20:14:58,717 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-09-20 20:14:58,717 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-09-20 20:14:58,717 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-09-20 20:14:58,717 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-09-20 20:14:58,717 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-09-20 20:14:58,717 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-09-20 20:14:58,717 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-09-20 20:14:58,717 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-09-20 20:14:58,717 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-09-20 20:14:58,717 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-09-20 20:14:58,718 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-09-20 20:14:58,718 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-09-20 20:14:58,927 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-09-20 20:14:58,950 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-09-20 20:14:58,951 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-09-20 20:14:58,952 INFO L271 PluginConnector]: Initializing CDTParser... [2022-09-20 20:14:58,953 INFO L275 PluginConnector]: CDTParser initialized [2022-09-20 20:14:58,953 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_unsafe-5.i [2022-09-20 20:14:58,997 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/640150658/9048963278bb49249208dcee1bef2b41/FLAG0099453bc [2022-09-20 20:14:59,356 INFO L306 CDTParser]: Found 1 translation units. [2022-09-20 20:14:59,356 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_unsafe-5.i [2022-09-20 20:14:59,374 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/640150658/9048963278bb49249208dcee1bef2b41/FLAG0099453bc [2022-09-20 20:14:59,389 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/640150658/9048963278bb49249208dcee1bef2b41 [2022-09-20 20:14:59,392 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-09-20 20:14:59,393 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-09-20 20:14:59,394 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-09-20 20:14:59,395 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-09-20 20:14:59,397 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-09-20 20:14:59,397 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 08:14:59" (1/1) ... [2022-09-20 20:14:59,398 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28b6f959 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:14:59, skipping insertion in model container [2022-09-20 20:14:59,398 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 08:14:59" (1/1) ... [2022-09-20 20:14:59,403 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-09-20 20:14:59,443 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-09-20 20:14:59,732 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_unsafe-5.i[30819,30832] [2022-09-20 20:14:59,734 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-09-20 20:14:59,740 INFO L203 MainTranslator]: Completed pre-run [2022-09-20 20:14:59,776 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_unsafe-5.i[30819,30832] [2022-09-20 20:14:59,780 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-09-20 20:14:59,802 INFO L208 MainTranslator]: Completed translation [2022-09-20 20:14:59,802 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:14:59 WrapperNode [2022-09-20 20:14:59,802 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-09-20 20:14:59,803 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-09-20 20:14:59,803 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-09-20 20:14:59,803 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-09-20 20:14:59,808 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:14:59" (1/1) ... [2022-09-20 20:14:59,816 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:14:59" (1/1) ... [2022-09-20 20:14:59,834 INFO L138 Inliner]: procedures = 164, calls = 26, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 71 [2022-09-20 20:14:59,834 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-09-20 20:14:59,835 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-09-20 20:14:59,835 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-09-20 20:14:59,835 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-09-20 20:14:59,840 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:14:59" (1/1) ... [2022-09-20 20:14:59,841 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:14:59" (1/1) ... [2022-09-20 20:14:59,843 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:14:59" (1/1) ... [2022-09-20 20:14:59,843 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:14:59" (1/1) ... [2022-09-20 20:14:59,855 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:14:59" (1/1) ... [2022-09-20 20:14:59,857 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:14:59" (1/1) ... [2022-09-20 20:14:59,858 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:14:59" (1/1) ... [2022-09-20 20:14:59,860 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-09-20 20:14:59,860 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-09-20 20:14:59,860 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-09-20 20:14:59,860 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-09-20 20:14:59,861 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:14:59" (1/1) ... [2022-09-20 20:14:59,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-09-20 20:14:59,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 20:14:59,889 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) [2022-09-20 20:14:59,895 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 [2022-09-20 20:14:59,916 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-09-20 20:14:59,916 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-09-20 20:14:59,916 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-09-20 20:14:59,916 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-09-20 20:14:59,917 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-09-20 20:14:59,917 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-09-20 20:14:59,917 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-09-20 20:14:59,917 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-09-20 20:14:59,917 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-09-20 20:14:59,917 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-09-20 20:14:59,918 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-09-20 20:14:59,918 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-09-20 20:14:59,918 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-09-20 20:14:59,919 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-09-20 20:15:00,041 INFO L234 CfgBuilder]: Building ICFG [2022-09-20 20:15:00,042 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-09-20 20:15:00,227 INFO L275 CfgBuilder]: Performing block encoding [2022-09-20 20:15:00,231 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-09-20 20:15:00,232 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-09-20 20:15:00,233 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 08:15:00 BoogieIcfgContainer [2022-09-20 20:15:00,233 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-09-20 20:15:00,234 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-09-20 20:15:00,235 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-09-20 20:15:00,237 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-09-20 20:15:00,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 08:14:59" (1/3) ... [2022-09-20 20:15:00,237 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d4ffdf7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 08:15:00, skipping insertion in model container [2022-09-20 20:15:00,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:14:59" (2/3) ... [2022-09-20 20:15:00,238 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d4ffdf7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 08:15:00, skipping insertion in model container [2022-09-20 20:15:00,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 08:15:00" (3/3) ... [2022-09-20 20:15:00,238 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_unsafe-5.i [2022-09-20 20:15:00,258 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-09-20 20:15:00,258 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-09-20 20:15:00,258 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-09-20 20:15:00,316 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-09-20 20:15:00,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 96 places, 96 transitions, 202 flow [2022-09-20 20:15:00,377 INFO L130 PetriNetUnfolder]: 7/94 cut-off events. [2022-09-20 20:15:00,377 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-09-20 20:15:00,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101 conditions, 94 events. 7/94 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 71 event pairs, 0 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 64. Up to 2 conditions per place. [2022-09-20 20:15:00,380 INFO L82 GeneralOperation]: Start removeDead. Operand has 96 places, 96 transitions, 202 flow [2022-09-20 20:15:00,383 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 94 places, 94 transitions, 194 flow [2022-09-20 20:15:00,389 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-09-20 20:15:00,395 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;@7696e41d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-09-20 20:15:00,395 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-09-20 20:15:00,427 INFO L130 PetriNetUnfolder]: 6/84 cut-off events. [2022-09-20 20:15:00,427 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-09-20 20:15:00,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 20:15:00,428 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 20:15:00,428 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 20:15:00,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 20:15:00,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1927097680, now seen corresponding path program 1 times [2022-09-20 20:15:00,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 20:15:00,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786453511] [2022-09-20 20:15:00,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 20:15:00,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 20:15:00,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 20:15:00,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 20:15:00,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 20:15:00,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786453511] [2022-09-20 20:15:00,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786453511] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 20:15:00,641 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 20:15:00,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-09-20 20:15:00,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760941603] [2022-09-20 20:15:00,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 20:15:00,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-09-20 20:15:00,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 20:15:00,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-09-20 20:15:00,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-09-20 20:15:00,684 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 96 [2022-09-20 20:15:00,688 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 94 transitions, 194 flow. Second operand has 2 states, 2 states have (on average 90.5) internal successors, (181), 2 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 20:15:00,688 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 20:15:00,688 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 96 [2022-09-20 20:15:00,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 20:15:00,736 INFO L130 PetriNetUnfolder]: 3/89 cut-off events. [2022-09-20 20:15:00,737 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-09-20 20:15:00,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99 conditions, 89 events. 3/89 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 66 event pairs, 0 based on Foata normal form. 5/90 useless extension candidates. Maximal degree in co-relation 60. Up to 3 conditions per place. [2022-09-20 20:15:00,738 INFO L137 encePairwiseOnDemand]: 92/96 looper letters, 2 selfloop transitions, 0 changer transitions 0/89 dead transitions. [2022-09-20 20:15:00,739 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 89 transitions, 188 flow [2022-09-20 20:15:00,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-09-20 20:15:00,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-09-20 20:15:00,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 184 transitions. [2022-09-20 20:15:00,748 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9583333333333334 [2022-09-20 20:15:00,749 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 184 transitions. [2022-09-20 20:15:00,749 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 184 transitions. [2022-09-20 20:15:00,751 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 20:15:00,752 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 184 transitions. [2022-09-20 20:15:00,757 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 92.0) internal successors, (184), 2 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 20:15:00,764 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 96.0) internal successors, (288), 3 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 20:15:00,765 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 96.0) internal successors, (288), 3 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 20:15:00,766 INFO L175 Difference]: Start difference. First operand has 94 places, 94 transitions, 194 flow. Second operand 2 states and 184 transitions. [2022-09-20 20:15:00,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 89 transitions, 188 flow [2022-09-20 20:15:00,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 89 transitions, 186 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-09-20 20:15:00,773 INFO L231 Difference]: Finished difference. Result has 92 places, 89 transitions, 182 flow [2022-09-20 20:15:00,775 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=182, PETRI_PLACES=92, PETRI_TRANSITIONS=89} [2022-09-20 20:15:00,778 INFO L287 CegarLoopForPetriNet]: 94 programPoint places, -2 predicate places. [2022-09-20 20:15:00,778 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 89 transitions, 182 flow [2022-09-20 20:15:00,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 90.5) internal successors, (181), 2 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 20:15:00,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 20:15:00,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 20:15:00,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-09-20 20:15:00,780 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 20:15:00,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 20:15:00,781 INFO L85 PathProgramCache]: Analyzing trace with hash 560415153, now seen corresponding path program 1 times [2022-09-20 20:15:00,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 20:15:00,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451398314] [2022-09-20 20:15:00,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 20:15:00,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 20:15:00,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 20:15:00,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 20:15:00,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 20:15:00,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451398314] [2022-09-20 20:15:00,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451398314] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 20:15:00,889 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 20:15:00,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-09-20 20:15:00,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310528826] [2022-09-20 20:15:00,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 20:15:00,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-09-20 20:15:00,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 20:15:00,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-09-20 20:15:00,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-09-20 20:15:00,893 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 96 [2022-09-20 20:15:00,893 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 89 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 20:15:00,893 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 20:15:00,894 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 96 [2022-09-20 20:15:00,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 20:15:00,933 INFO L130 PetriNetUnfolder]: 3/95 cut-off events. [2022-09-20 20:15:00,934 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-09-20 20:15:00,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113 conditions, 95 events. 3/95 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 63 event pairs, 0 based on Foata normal form. 0/91 useless extension candidates. Maximal degree in co-relation 110. Up to 6 conditions per place. [2022-09-20 20:15:00,938 INFO L137 encePairwiseOnDemand]: 93/96 looper letters, 9 selfloop transitions, 2 changer transitions 0/92 dead transitions. [2022-09-20 20:15:00,938 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 92 transitions, 210 flow [2022-09-20 20:15:00,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-09-20 20:15:00,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-09-20 20:15:00,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 261 transitions. [2022-09-20 20:15:00,940 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.90625 [2022-09-20 20:15:00,940 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 261 transitions. [2022-09-20 20:15:00,940 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 261 transitions. [2022-09-20 20:15:00,941 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 20:15:00,941 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 261 transitions. [2022-09-20 20:15:00,941 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 20:15:00,942 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 96.0) internal successors, (384), 4 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 20:15:00,942 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 96.0) internal successors, (384), 4 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 20:15:00,943 INFO L175 Difference]: Start difference. First operand has 92 places, 89 transitions, 182 flow. Second operand 3 states and 261 transitions. [2022-09-20 20:15:00,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 92 transitions, 210 flow [2022-09-20 20:15:00,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 92 transitions, 210 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-09-20 20:15:00,947 INFO L231 Difference]: Finished difference. Result has 95 places, 90 transitions, 194 flow [2022-09-20 20:15:00,947 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=194, PETRI_PLACES=95, PETRI_TRANSITIONS=90} [2022-09-20 20:15:00,948 INFO L287 CegarLoopForPetriNet]: 94 programPoint places, 1 predicate places. [2022-09-20 20:15:00,948 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 90 transitions, 194 flow [2022-09-20 20:15:00,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 20:15:00,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 20:15:00,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 20:15:00,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-09-20 20:15:00,949 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 20:15:00,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 20:15:00,952 INFO L85 PathProgramCache]: Analyzing trace with hash -951035470, now seen corresponding path program 1 times [2022-09-20 20:15:00,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 20:15:00,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263924562] [2022-09-20 20:15:00,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 20:15:00,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 20:15:00,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 20:15:01,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 20:15:01,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 20:15:01,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263924562] [2022-09-20 20:15:01,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263924562] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 20:15:01,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101941765] [2022-09-20 20:15:01,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 20:15:01,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 20:15:01,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 20:15:01,065 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) [2022-09-20 20:15:01,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-09-20 20:15:01,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 20:15:01,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 4 conjunts are in the unsatisfiable core [2022-09-20 20:15:01,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 20:15:01,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 20:15:01,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 20:15:01,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 20:15:01,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101941765] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 20:15:01,261 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 20:15:01,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-09-20 20:15:01,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905706454] [2022-09-20 20:15:01,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 20:15:01,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-09-20 20:15:01,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 20:15:01,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-09-20 20:15:01,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-09-20 20:15:01,263 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 96 [2022-09-20 20:15:01,264 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 90 transitions, 194 flow. Second operand has 10 states, 10 states have (on average 83.0) internal successors, (830), 10 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 20:15:01,264 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 20:15:01,264 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 96 [2022-09-20 20:15:01,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 20:15:01,344 INFO L130 PetriNetUnfolder]: 3/104 cut-off events. [2022-09-20 20:15:01,345 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-09-20 20:15:01,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138 conditions, 104 events. 3/104 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 53 event pairs, 0 based on Foata normal form. 2/103 useless extension candidates. Maximal degree in co-relation 133. Up to 6 conditions per place. [2022-09-20 20:15:01,346 INFO L137 encePairwiseOnDemand]: 90/96 looper letters, 10 selfloop transitions, 9 changer transitions 0/98 dead transitions. [2022-09-20 20:15:01,346 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 98 transitions, 250 flow [2022-09-20 20:15:01,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-09-20 20:15:01,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-09-20 20:15:01,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 750 transitions. [2022-09-20 20:15:01,349 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8680555555555556 [2022-09-20 20:15:01,349 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 750 transitions. [2022-09-20 20:15:01,349 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 750 transitions. [2022-09-20 20:15:01,349 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 20:15:01,349 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 750 transitions. [2022-09-20 20:15:01,351 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 83.33333333333333) internal successors, (750), 9 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 20:15:01,353 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 96.0) internal successors, (960), 10 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 20:15:01,353 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 96.0) internal successors, (960), 10 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 20:15:01,353 INFO L175 Difference]: Start difference. First operand has 95 places, 90 transitions, 194 flow. Second operand 9 states and 750 transitions. [2022-09-20 20:15:01,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 98 transitions, 250 flow [2022-09-20 20:15:01,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 98 transitions, 248 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-09-20 20:15:01,355 INFO L231 Difference]: Finished difference. Result has 105 places, 96 transitions, 242 flow [2022-09-20 20:15:01,356 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=242, PETRI_PLACES=105, PETRI_TRANSITIONS=96} [2022-09-20 20:15:01,356 INFO L287 CegarLoopForPetriNet]: 94 programPoint places, 11 predicate places. [2022-09-20 20:15:01,356 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 96 transitions, 242 flow [2022-09-20 20:15:01,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 83.0) internal successors, (830), 10 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 20:15:01,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 20:15:01,357 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 20:15:01,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-09-20 20:15:01,575 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 [2022-09-20 20:15:01,575 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 20:15:01,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 20:15:01,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1666707666, now seen corresponding path program 2 times [2022-09-20 20:15:01,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 20:15:01,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437156384] [2022-09-20 20:15:01,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 20:15:01,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 20:15:01,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 20:15:01,669 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 20:15:01,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 20:15:01,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437156384] [2022-09-20 20:15:01,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437156384] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 20:15:01,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515836194] [2022-09-20 20:15:01,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-09-20 20:15:01,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 20:15:01,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 20:15:01,689 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) [2022-09-20 20:15:01,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-09-20 20:15:01,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-09-20 20:15:01,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 20:15:01,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 8 conjunts are in the unsatisfiable core [2022-09-20 20:15:01,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 20:15:01,813 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 20:15:01,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 20:15:01,881 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 20:15:01,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515836194] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 20:15:01,881 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 20:15:01,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-09-20 20:15:01,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788702800] [2022-09-20 20:15:01,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 20:15:01,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-09-20 20:15:01,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 20:15:01,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-09-20 20:15:01,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-09-20 20:15:01,884 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 96 [2022-09-20 20:15:01,885 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 96 transitions, 242 flow. Second operand has 18 states, 18 states have (on average 83.0) internal successors, (1494), 18 states have internal predecessors, (1494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 20:15:01,885 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 20:15:01,885 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 96 [2022-09-20 20:15:01,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 20:15:02,021 INFO L130 PetriNetUnfolder]: 3/132 cut-off events. [2022-09-20 20:15:02,021 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-09-20 20:15:02,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 231 conditions, 132 events. 3/132 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 54 event pairs, 0 based on Foata normal form. 4/133 useless extension candidates. Maximal degree in co-relation 224. Up to 11 conditions per place. [2022-09-20 20:15:02,023 INFO L137 encePairwiseOnDemand]: 90/96 looper letters, 14 selfloop transitions, 21 changer transitions 0/114 dead transitions. [2022-09-20 20:15:02,023 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 114 transitions, 408 flow [2022-09-20 20:15:02,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-09-20 20:15:02,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-09-20 20:15:02,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1740 transitions. [2022-09-20 20:15:02,027 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8630952380952381 [2022-09-20 20:15:02,027 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1740 transitions. [2022-09-20 20:15:02,027 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1740 transitions. [2022-09-20 20:15:02,028 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 20:15:02,028 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1740 transitions. [2022-09-20 20:15:02,031 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 82.85714285714286) internal successors, (1740), 21 states have internal predecessors, (1740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 20:15:02,033 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 96.0) internal successors, (2112), 22 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 20:15:02,034 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 96.0) internal successors, (2112), 22 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 20:15:02,034 INFO L175 Difference]: Start difference. First operand has 105 places, 96 transitions, 242 flow. Second operand 21 states and 1740 transitions. [2022-09-20 20:15:02,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 114 transitions, 408 flow [2022-09-20 20:15:02,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 114 transitions, 394 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-09-20 20:15:02,037 INFO L231 Difference]: Finished difference. Result has 129 places, 109 transitions, 366 flow [2022-09-20 20:15:02,037 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=366, PETRI_PLACES=129, PETRI_TRANSITIONS=109} [2022-09-20 20:15:02,038 INFO L287 CegarLoopForPetriNet]: 94 programPoint places, 35 predicate places. [2022-09-20 20:15:02,038 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 109 transitions, 366 flow [2022-09-20 20:15:02,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 83.0) internal successors, (1494), 18 states have internal predecessors, (1494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 20:15:02,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 20:15:02,039 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 20:15:02,057 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-09-20 20:15:02,255 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 [2022-09-20 20:15:02,257 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 20:15:02,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 20:15:02,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1283180782, now seen corresponding path program 3 times [2022-09-20 20:15:02,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 20:15:02,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408712664] [2022-09-20 20:15:02,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 20:15:02,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 20:15:02,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 20:15:02,465 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 20:15:02,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 20:15:02,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408712664] [2022-09-20 20:15:02,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408712664] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 20:15:02,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758791557] [2022-09-20 20:15:02,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-09-20 20:15:02,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 20:15:02,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 20:15:02,467 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) [2022-09-20 20:15:02,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-09-20 20:15:02,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-09-20 20:15:02,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 20:15:02,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 16 conjunts are in the unsatisfiable core [2022-09-20 20:15:02,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 20:15:02,620 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 20:15:02,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 20:15:02,813 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 20:15:02,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758791557] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 20:15:02,814 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 20:15:02,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 27 [2022-09-20 20:15:02,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151796613] [2022-09-20 20:15:02,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 20:15:02,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-09-20 20:15:02,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 20:15:02,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-09-20 20:15:02,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=507, Unknown=0, NotChecked=0, Total=702 [2022-09-20 20:15:02,818 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 96 [2022-09-20 20:15:02,819 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 109 transitions, 366 flow. Second operand has 27 states, 27 states have (on average 83.07407407407408) internal successors, (2243), 27 states have internal predecessors, (2243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 20:15:02,819 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 20:15:02,819 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 96 [2022-09-20 20:15:02,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 20:15:03,144 INFO L130 PetriNetUnfolder]: 3/167 cut-off events. [2022-09-20 20:15:03,144 INFO L131 PetriNetUnfolder]: For 184/184 co-relation queries the response was YES. [2022-09-20 20:15:03,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 381 conditions, 167 events. 3/167 cut-off events. For 184/184 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 53 event pairs, 0 based on Foata normal form. 5/169 useless extension candidates. Maximal degree in co-relation 369. Up to 21 conditions per place. [2022-09-20 20:15:03,145 INFO L137 encePairwiseOnDemand]: 90/96 looper letters, 19 selfloop transitions, 36 changer transitions 0/134 dead transitions. [2022-09-20 20:15:03,145 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 134 transitions, 668 flow [2022-09-20 20:15:03,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-09-20 20:15:03,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-09-20 20:15:03,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2976 transitions. [2022-09-20 20:15:03,151 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8611111111111112 [2022-09-20 20:15:03,151 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2976 transitions. [2022-09-20 20:15:03,151 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2976 transitions. [2022-09-20 20:15:03,152 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 20:15:03,153 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2976 transitions. [2022-09-20 20:15:03,157 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 82.66666666666667) internal successors, (2976), 36 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 20:15:03,162 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 96.0) internal successors, (3552), 37 states have internal predecessors, (3552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 20:15:03,163 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 96.0) internal successors, (3552), 37 states have internal predecessors, (3552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 20:15:03,163 INFO L175 Difference]: Start difference. First operand has 129 places, 109 transitions, 366 flow. Second operand 36 states and 2976 transitions. [2022-09-20 20:15:03,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 134 transitions, 668 flow [2022-09-20 20:15:03,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 134 transitions, 634 flow, removed 11 selfloop flow, removed 6 redundant places. [2022-09-20 20:15:03,169 INFO L231 Difference]: Finished difference. Result has 164 places, 125 transitions, 554 flow [2022-09-20 20:15:03,169 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=554, PETRI_PLACES=164, PETRI_TRANSITIONS=125} [2022-09-20 20:15:03,169 INFO L287 CegarLoopForPetriNet]: 94 programPoint places, 70 predicate places. [2022-09-20 20:15:03,170 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 125 transitions, 554 flow [2022-09-20 20:15:03,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 83.07407407407408) internal successors, (2243), 27 states have internal predecessors, (2243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 20:15:03,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 20:15:03,170 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 20:15:03,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-09-20 20:15:03,383 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 [2022-09-20 20:15:03,384 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 20:15:03,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 20:15:03,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1938020081, now seen corresponding path program 4 times [2022-09-20 20:15:03,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 20:15:03,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90823644] [2022-09-20 20:15:03,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 20:15:03,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 20:15:03,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 20:15:04,309 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 0 proven. 474 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 20:15:04,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 20:15:04,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90823644] [2022-09-20 20:15:04,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90823644] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 20:15:04,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171582831] [2022-09-20 20:15:04,310 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-09-20 20:15:04,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 20:15:04,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 20:15:04,312 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) [2022-09-20 20:15:04,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-09-20 20:15:04,386 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-09-20 20:15:04,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 20:15:04,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 41 conjunts are in the unsatisfiable core [2022-09-20 20:15:04,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 20:15:06,506 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 335 proven. 139 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 20:15:06,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 20:15:09,006 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 0 proven. 474 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 20:15:09,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171582831] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 20:15:09,006 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 20:15:09,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 121 [2022-09-20 20:15:09,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66679198] [2022-09-20 20:15:09,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 20:15:09,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2022-09-20 20:15:09,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 20:15:09,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2022-09-20 20:15:09,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=947, Invalid=13573, Unknown=0, NotChecked=0, Total=14520 [2022-09-20 20:15:09,016 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 96 [2022-09-20 20:15:09,022 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 125 transitions, 554 flow. Second operand has 121 states, 121 states have (on average 69.27272727272727) internal successors, (8382), 121 states have internal predecessors, (8382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 20:15:09,022 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 20:15:09,022 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 96 [2022-09-20 20:15:09,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 20:16:45,290 INFO L130 PetriNetUnfolder]: 20861/70670 cut-off events. [2022-09-20 20:16:45,291 INFO L131 PetriNetUnfolder]: For 27326/27326 co-relation queries the response was YES. [2022-09-20 20:16:45,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127869 conditions, 70670 events. 20861/70670 cut-off events. For 27326/27326 co-relation queries the response was YES. Maximal size of possible extension queue 1090. Compared 923812 event pairs, 0 based on Foata normal form. 0/66088 useless extension candidates. Maximal degree in co-relation 127851. Up to 10556 conditions per place. [2022-09-20 20:16:45,850 INFO L137 encePairwiseOnDemand]: 81/96 looper letters, 703 selfloop transitions, 1725 changer transitions 329/2851 dead transitions. [2022-09-20 20:16:45,850 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 815 places, 2851 transitions, 11516 flow [2022-09-20 20:16:45,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 652 states. [2022-09-20 20:16:45,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 652 states. [2022-09-20 20:16:45,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 47100 transitions. [2022-09-20 20:16:45,894 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7524923312883436 [2022-09-20 20:16:45,894 INFO L72 ComplementDD]: Start complementDD. Operand 652 states and 47100 transitions. [2022-09-20 20:16:45,894 INFO L73 IsDeterministic]: Start isDeterministic. Operand 652 states and 47100 transitions. [2022-09-20 20:16:45,909 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 20:16:45,909 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 652 states and 47100 transitions. [2022-09-20 20:16:45,981 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 653 states, 652 states have (on average 72.23926380368098) internal successors, (47100), 652 states have internal predecessors, (47100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 20:16:46,060 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 653 states, 653 states have (on average 96.0) internal successors, (62688), 653 states have internal predecessors, (62688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 20:16:46,083 INFO L81 ComplementDD]: Finished complementDD. Result has 653 states, 653 states have (on average 96.0) internal successors, (62688), 653 states have internal predecessors, (62688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 20:16:46,083 INFO L175 Difference]: Start difference. First operand has 164 places, 125 transitions, 554 flow. Second operand 652 states and 47100 transitions. [2022-09-20 20:16:46,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 815 places, 2851 transitions, 11516 flow [2022-09-20 20:16:46,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 797 places, 2851 transitions, 11466 flow, removed 7 selfloop flow, removed 18 redundant places. [2022-09-20 20:16:46,550 INFO L231 Difference]: Finished difference. Result has 872 places, 1874 transitions, 8046 flow [2022-09-20 20:16:46,551 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=504, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=652, PETRI_FLOW=8046, PETRI_PLACES=872, PETRI_TRANSITIONS=1874} [2022-09-20 20:16:46,552 INFO L287 CegarLoopForPetriNet]: 94 programPoint places, 778 predicate places. [2022-09-20 20:16:46,553 INFO L495 AbstractCegarLoop]: Abstraction has has 872 places, 1874 transitions, 8046 flow [2022-09-20 20:16:46,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 69.27272727272727) internal successors, (8382), 121 states have internal predecessors, (8382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 20:16:46,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 20:16:46,554 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 20:16:46,573 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-09-20 20:16:46,771 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 [2022-09-20 20:16:46,772 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 20:16:46,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 20:16:46,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1030920209, now seen corresponding path program 1 times [2022-09-20 20:16:46,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 20:16:46,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205924125] [2022-09-20 20:16:46,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 20:16:46,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 20:16:46,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 20:16:47,744 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 0 proven. 474 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 20:16:47,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 20:16:47,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205924125] [2022-09-20 20:16:47,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205924125] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 20:16:47,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185472649] [2022-09-20 20:16:47,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 20:16:47,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 20:16:47,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 20:16:47,746 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) [2022-09-20 20:16:47,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-09-20 20:16:47,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 20:16:47,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 43 conjunts are in the unsatisfiable core [2022-09-20 20:16:47,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 20:16:50,074 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 325 proven. 149 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 20:16:50,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 20:16:52,775 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 0 proven. 474 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 20:16:52,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185472649] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 20:16:52,775 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 20:16:52,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 127 [2022-09-20 20:16:52,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682312848] [2022-09-20 20:16:52,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 20:16:52,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 127 states [2022-09-20 20:16:52,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 20:16:52,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2022-09-20 20:16:52,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=955, Invalid=15047, Unknown=0, NotChecked=0, Total=16002 [2022-09-20 20:16:52,783 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 96 [2022-09-20 20:16:52,787 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 872 places, 1874 transitions, 8046 flow. Second operand has 127 states, 127 states have (on average 69.25984251968504) internal successors, (8796), 127 states have internal predecessors, (8796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 20:16:52,787 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 20:16:52,787 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 96 [2022-09-20 20:16:52,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand