/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread/stack-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-27 17:42:29,330 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-27 17:42:29,332 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-27 17:42:29,366 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-27 17:42:29,366 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-27 17:42:29,369 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-27 17:42:29,371 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-27 17:42:29,373 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-27 17:42:29,374 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-27 17:42:29,378 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-27 17:42:29,379 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-27 17:42:29,379 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-27 17:42:29,379 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-27 17:42:29,380 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-27 17:42:29,380 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-27 17:42:29,381 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-27 17:42:29,381 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-27 17:42:29,382 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-27 17:42:29,383 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-27 17:42:29,384 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-27 17:42:29,384 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-27 17:42:29,385 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-27 17:42:29,386 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-27 17:42:29,386 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-27 17:42:29,388 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-01-27 17:42:29,389 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-01-27 17:42:29,389 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-01-27 17:42:29,389 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-01-27 17:42:29,389 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-01-27 17:42:29,390 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-01-27 17:42:29,390 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-27 17:42:29,392 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-27 17:42:29,393 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-27 17:42:29,393 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-27 17:42:29,394 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-27 17:42:29,394 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-27 17:42:29,394 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-27 17:42:29,394 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-27 17:42:29,395 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-27 17:42:29,395 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-27 17:42:29,396 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-27 17:42:29,397 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-01-27 17:42:29,421 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-27 17:42:29,421 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-27 17:42:29,422 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-27 17:42:29,422 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-27 17:42:29,422 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-27 17:42:29,422 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-27 17:42:29,423 INFO L138 SettingsManager]: * Use SBE=true [2023-01-27 17:42:29,423 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-27 17:42:29,423 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-27 17:42:29,423 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-27 17:42:29,423 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-27 17:42:29,423 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-27 17:42:29,424 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-27 17:42:29,424 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-27 17:42:29,424 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-27 17:42:29,424 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-27 17:42:29,424 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-27 17:42:29,424 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-27 17:42:29,424 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-27 17:42:29,424 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-27 17:42:29,424 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-27 17:42:29,424 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-27 17:42:29,424 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-27 17:42:29,424 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 17:42:29,425 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-27 17:42:29,425 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-27 17:42:29,425 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-27 17:42:29,425 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-27 17:42:29,425 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-27 17:42:29,425 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-27 17:42:29,425 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-27 17:42:29,425 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-01-27 17:42:29,616 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-27 17:42:29,639 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-27 17:42:29,641 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-27 17:42:29,641 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-27 17:42:29,642 INFO L275 PluginConnector]: CDTParser initialized [2023-01-27 17:42:29,642 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/stack-2.i [2023-01-27 17:42:30,660 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-27 17:42:30,874 INFO L351 CDTParser]: Found 1 translation units. [2023-01-27 17:42:30,875 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack-2.i [2023-01-27 17:42:30,894 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/28bc4bdcf/ec191a38189b4fe1980b6130023bc626/FLAG046ff1063 [2023-01-27 17:42:30,904 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/28bc4bdcf/ec191a38189b4fe1980b6130023bc626 [2023-01-27 17:42:30,906 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-27 17:42:30,907 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-27 17:42:30,908 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-27 17:42:30,908 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-27 17:42:30,910 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-27 17:42:30,910 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 05:42:30" (1/1) ... [2023-01-27 17:42:30,911 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70eaa885 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:42:30, skipping insertion in model container [2023-01-27 17:42:30,911 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 05:42:30" (1/1) ... [2023-01-27 17:42:30,915 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-27 17:42:30,952 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-27 17:42:31,224 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack-2.i[41520,41533] [2023-01-27 17:42:31,248 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 17:42:31,257 INFO L203 MainTranslator]: Completed pre-run [2023-01-27 17:42:31,328 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack-2.i[41520,41533] [2023-01-27 17:42:31,342 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 17:42:31,387 INFO L208 MainTranslator]: Completed translation [2023-01-27 17:42:31,388 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:42:31 WrapperNode [2023-01-27 17:42:31,388 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-27 17:42:31,389 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-27 17:42:31,390 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-27 17:42:31,390 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-27 17:42:31,394 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:42:31" (1/1) ... [2023-01-27 17:42:31,419 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:42:31" (1/1) ... [2023-01-27 17:42:31,442 INFO L138 Inliner]: procedures = 277, calls = 44, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 160 [2023-01-27 17:42:31,442 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-27 17:42:31,443 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-27 17:42:31,443 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-27 17:42:31,443 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-27 17:42:31,449 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:42:31" (1/1) ... [2023-01-27 17:42:31,449 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:42:31" (1/1) ... [2023-01-27 17:42:31,462 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:42:31" (1/1) ... [2023-01-27 17:42:31,462 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:42:31" (1/1) ... [2023-01-27 17:42:31,466 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:42:31" (1/1) ... [2023-01-27 17:42:31,468 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:42:31" (1/1) ... [2023-01-27 17:42:31,469 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:42:31" (1/1) ... [2023-01-27 17:42:31,470 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:42:31" (1/1) ... [2023-01-27 17:42:31,472 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-27 17:42:31,473 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-27 17:42:31,473 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-27 17:42:31,473 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-27 17:42:31,473 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:42:31" (1/1) ... [2023-01-27 17:42:31,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 17:42:31,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 17:42:31,500 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-01-27 17:42:31,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-01-27 17:42:31,523 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-01-27 17:42:31,529 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-01-27 17:42:31,529 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-01-27 17:42:31,529 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-01-27 17:42:31,529 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-27 17:42:31,529 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-27 17:42:31,529 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-27 17:42:31,529 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-27 17:42:31,529 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-01-27 17:42:31,529 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-27 17:42:31,530 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-27 17:42:31,530 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-27 17:42:31,530 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-27 17:42:31,531 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-01-27 17:42:31,623 INFO L236 CfgBuilder]: Building ICFG [2023-01-27 17:42:31,625 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-27 17:42:31,832 INFO L277 CfgBuilder]: Performing block encoding [2023-01-27 17:42:31,838 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-27 17:42:31,838 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-01-27 17:42:31,839 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 05:42:31 BoogieIcfgContainer [2023-01-27 17:42:31,839 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-27 17:42:31,840 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-27 17:42:31,841 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-27 17:42:31,843 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-27 17:42:31,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 05:42:30" (1/3) ... [2023-01-27 17:42:31,843 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14f7ce0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 05:42:31, skipping insertion in model container [2023-01-27 17:42:31,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:42:31" (2/3) ... [2023-01-27 17:42:31,844 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14f7ce0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 05:42:31, skipping insertion in model container [2023-01-27 17:42:31,844 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 05:42:31" (3/3) ... [2023-01-27 17:42:31,844 INFO L112 eAbstractionObserver]: Analyzing ICFG stack-2.i [2023-01-27 17:42:31,856 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-27 17:42:31,856 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-01-27 17:42:31,856 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-27 17:42:31,951 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-27 17:42:31,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 159 places, 162 transitions, 340 flow [2023-01-27 17:42:32,026 INFO L130 PetriNetUnfolder]: 10/160 cut-off events. [2023-01-27 17:42:32,027 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 17:42:32,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169 conditions, 160 events. 10/160 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 379 event pairs, 0 based on Foata normal form. 0/148 useless extension candidates. Maximal degree in co-relation 118. Up to 3 conditions per place. [2023-01-27 17:42:32,035 INFO L82 GeneralOperation]: Start removeDead. Operand has 159 places, 162 transitions, 340 flow [2023-01-27 17:42:32,043 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 148 places, 151 transitions, 311 flow [2023-01-27 17:42:32,047 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 17:42:32,062 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 148 places, 151 transitions, 311 flow [2023-01-27 17:42:32,068 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 148 places, 151 transitions, 311 flow [2023-01-27 17:42:32,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 148 places, 151 transitions, 311 flow [2023-01-27 17:42:32,106 INFO L130 PetriNetUnfolder]: 10/151 cut-off events. [2023-01-27 17:42:32,106 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-27 17:42:32,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159 conditions, 151 events. 10/151 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 311 event pairs, 0 based on Foata normal form. 0/139 useless extension candidates. Maximal degree in co-relation 118. Up to 3 conditions per place. [2023-01-27 17:42:32,110 INFO L119 LiptonReduction]: Number of co-enabled transitions 7334 [2023-01-27 17:42:35,182 INFO L134 LiptonReduction]: Checked pairs total: 9688 [2023-01-27 17:42:35,182 INFO L136 LiptonReduction]: Total number of compositions: 141 [2023-01-27 17:42:35,192 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 17:42:35,213 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;@1d1555ea, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 17:42:35,213 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-01-27 17:42:35,216 INFO L130 PetriNetUnfolder]: 0/13 cut-off events. [2023-01-27 17:42:35,216 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-27 17:42:35,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:42:35,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-01-27 17:42:35,217 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-01-27 17:42:35,220 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:42:35,220 INFO L85 PathProgramCache]: Analyzing trace with hash 2091505467, now seen corresponding path program 1 times [2023-01-27 17:42:35,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:42:35,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134440562] [2023-01-27 17:42:35,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:42:35,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:42:35,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:42:35,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 17:42:35,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:42:35,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134440562] [2023-01-27 17:42:35,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134440562] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:42:35,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:42:35,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 17:42:35,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097206380] [2023-01-27 17:42:35,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:42:35,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 17:42:35,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:42:35,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 17:42:35,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 17:42:35,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 303 [2023-01-27 17:42:35,466 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 143.0) internal successors, (429), 3 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:42:35,467 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:42:35,467 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 303 [2023-01-27 17:42:35,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:42:35,648 INFO L130 PetriNetUnfolder]: 917/1474 cut-off events. [2023-01-27 17:42:35,648 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-01-27 17:42:35,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3012 conditions, 1474 events. 917/1474 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 6122 event pairs, 270 based on Foata normal form. 0/1164 useless extension candidates. Maximal degree in co-relation 2788. Up to 840 conditions per place. [2023-01-27 17:42:35,657 INFO L137 encePairwiseOnDemand]: 298/303 looper letters, 57 selfloop transitions, 4 changer transitions 0/61 dead transitions. [2023-01-27 17:42:35,657 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 61 transitions, 259 flow [2023-01-27 17:42:35,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 17:42:35,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 17:42:35,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 485 transitions. [2023-01-27 17:42:35,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5335533553355336 [2023-01-27 17:42:35,669 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 485 transitions. [2023-01-27 17:42:35,669 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 485 transitions. [2023-01-27 17:42:35,670 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:42:35,671 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 485 transitions. [2023-01-27 17:42:35,675 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:42:35,678 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 303.0) internal successors, (1212), 4 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:42:35,678 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 303.0) internal successors, (1212), 4 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:42:35,679 INFO L175 Difference]: Start difference. First operand has 35 places, 33 transitions, 75 flow. Second operand 3 states and 485 transitions. [2023-01-27 17:42:35,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 61 transitions, 259 flow [2023-01-27 17:42:35,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 61 transitions, 251 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-01-27 17:42:35,683 INFO L231 Difference]: Finished difference. Result has 36 places, 36 transitions, 100 flow [2023-01-27 17:42:35,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=303, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=36, PETRI_TRANSITIONS=36} [2023-01-27 17:42:35,687 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 1 predicate places. [2023-01-27 17:42:35,687 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 36 transitions, 100 flow [2023-01-27 17:42:35,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 143.0) internal successors, (429), 3 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:42:35,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:42:35,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 17:42:35,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-27 17:42:35,688 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-01-27 17:42:35,688 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:42:35,688 INFO L85 PathProgramCache]: Analyzing trace with hash 985591015, now seen corresponding path program 1 times [2023-01-27 17:42:35,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:42:35,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161021576] [2023-01-27 17:42:35,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:42:35,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:42:35,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:42:35,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 17:42:35,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:42:35,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161021576] [2023-01-27 17:42:35,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161021576] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:42:35,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:42:35,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 17:42:35,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936672937] [2023-01-27 17:42:35,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:42:35,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 17:42:35,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:42:35,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 17:42:35,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 17:42:35,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 303 [2023-01-27 17:42:35,802 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 36 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:42:35,802 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:42:35,802 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 303 [2023-01-27 17:42:35,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:42:35,920 INFO L130 PetriNetUnfolder]: 897/1480 cut-off events. [2023-01-27 17:42:35,921 INFO L131 PetriNetUnfolder]: For 191/191 co-relation queries the response was YES. [2023-01-27 17:42:35,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3209 conditions, 1480 events. 897/1480 cut-off events. For 191/191 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 6152 event pairs, 398 based on Foata normal form. 0/1228 useless extension candidates. Maximal degree in co-relation 2952. Up to 1184 conditions per place. [2023-01-27 17:42:35,926 INFO L137 encePairwiseOnDemand]: 300/303 looper letters, 48 selfloop transitions, 2 changer transitions 3/54 dead transitions. [2023-01-27 17:42:35,926 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 54 transitions, 249 flow [2023-01-27 17:42:35,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 17:42:35,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 17:42:35,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 492 transitions. [2023-01-27 17:42:35,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5412541254125413 [2023-01-27 17:42:35,928 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 492 transitions. [2023-01-27 17:42:35,928 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 492 transitions. [2023-01-27 17:42:35,928 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:42:35,928 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 492 transitions. [2023-01-27 17:42:35,929 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 164.0) internal successors, (492), 3 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:42:35,931 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 303.0) internal successors, (1212), 4 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:42:35,931 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 303.0) internal successors, (1212), 4 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:42:35,931 INFO L175 Difference]: Start difference. First operand has 36 places, 36 transitions, 100 flow. Second operand 3 states and 492 transitions. [2023-01-27 17:42:35,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 54 transitions, 249 flow [2023-01-27 17:42:35,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 54 transitions, 239 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-01-27 17:42:35,933 INFO L231 Difference]: Finished difference. Result has 37 places, 37 transitions, 104 flow [2023-01-27 17:42:35,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=303, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=37, PETRI_TRANSITIONS=37} [2023-01-27 17:42:35,934 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 2 predicate places. [2023-01-27 17:42:35,934 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 37 transitions, 104 flow [2023-01-27 17:42:35,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:42:35,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:42:35,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 17:42:35,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-27 17:42:35,935 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-01-27 17:42:35,935 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:42:35,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1796788492, now seen corresponding path program 1 times [2023-01-27 17:42:35,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:42:35,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536379768] [2023-01-27 17:42:35,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:42:35,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:42:35,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:42:35,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 17:42:35,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:42:35,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536379768] [2023-01-27 17:42:35,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536379768] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:42:35,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:42:35,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 17:42:35,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271182751] [2023-01-27 17:42:35,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:42:35,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 17:42:35,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:42:35,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 17:42:35,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 17:42:35,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 303 [2023-01-27 17:42:35,989 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 37 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 148.0) internal successors, (444), 3 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:42:35,989 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:42:35,990 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 303 [2023-01-27 17:42:35,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:42:36,129 INFO L130 PetriNetUnfolder]: 953/1566 cut-off events. [2023-01-27 17:42:36,129 INFO L131 PetriNetUnfolder]: For 147/147 co-relation queries the response was YES. [2023-01-27 17:42:36,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3478 conditions, 1566 events. 953/1566 cut-off events. For 147/147 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 6650 event pairs, 659 based on Foata normal form. 56/1460 useless extension candidates. Maximal degree in co-relation 3214. Up to 1397 conditions per place. [2023-01-27 17:42:36,136 INFO L137 encePairwiseOnDemand]: 300/303 looper letters, 52 selfloop transitions, 4 changer transitions 0/57 dead transitions. [2023-01-27 17:42:36,136 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 57 transitions, 270 flow [2023-01-27 17:42:36,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 17:42:36,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 17:42:36,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 486 transitions. [2023-01-27 17:42:36,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5346534653465347 [2023-01-27 17:42:36,139 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 486 transitions. [2023-01-27 17:42:36,139 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 486 transitions. [2023-01-27 17:42:36,139 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:42:36,139 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 486 transitions. [2023-01-27 17:42:36,140 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 162.0) internal successors, (486), 3 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:42:36,142 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 303.0) internal successors, (1212), 4 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:42:36,142 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 303.0) internal successors, (1212), 4 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:42:36,142 INFO L175 Difference]: Start difference. First operand has 37 places, 37 transitions, 104 flow. Second operand 3 states and 486 transitions. [2023-01-27 17:42:36,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 57 transitions, 270 flow [2023-01-27 17:42:36,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 57 transitions, 268 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-27 17:42:36,144 INFO L231 Difference]: Finished difference. Result has 39 places, 38 transitions, 122 flow [2023-01-27 17:42:36,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=303, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=39, PETRI_TRANSITIONS=38} [2023-01-27 17:42:36,145 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 4 predicate places. [2023-01-27 17:42:36,145 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 38 transitions, 122 flow [2023-01-27 17:42:36,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 148.0) internal successors, (444), 3 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:42:36,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:42:36,145 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 17:42:36,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-27 17:42:36,146 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-01-27 17:42:36,146 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:42:36,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1638577751, now seen corresponding path program 1 times [2023-01-27 17:42:36,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:42:36,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917509858] [2023-01-27 17:42:36,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:42:36,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:42:36,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:42:36,233 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 17:42:36,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:42:36,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917509858] [2023-01-27 17:42:36,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917509858] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 17:42:36,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813356396] [2023-01-27 17:42:36,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:42:36,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 17:42:36,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 17:42:36,236 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) [2023-01-27 17:42:36,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-01-27 17:42:36,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:42:36,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 4 conjunts are in the unsatisfiable core [2023-01-27 17:42:36,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 17:42:36,358 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 17:42:36,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 17:42:36,400 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 17:42:36,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813356396] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 17:42:36,401 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 17:42:36,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-01-27 17:42:36,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560939452] [2023-01-27 17:42:36,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 17:42:36,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-01-27 17:42:36,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:42:36,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-01-27 17:42:36,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-01-27 17:42:36,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 303 [2023-01-27 17:42:36,406 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 38 transitions, 122 flow. Second operand has 8 states, 8 states have (on average 142.375) internal successors, (1139), 8 states have internal predecessors, (1139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:42:36,406 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:42:36,406 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 303 [2023-01-27 17:42:36,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:42:36,849 INFO L130 PetriNetUnfolder]: 1986/3223 cut-off events. [2023-01-27 17:42:36,850 INFO L131 PetriNetUnfolder]: For 1186/1186 co-relation queries the response was YES. [2023-01-27 17:42:36,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7663 conditions, 3223 events. 1986/3223 cut-off events. For 1186/1186 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 15001 event pairs, 399 based on Foata normal form. 52/2955 useless extension candidates. Maximal degree in co-relation 7184. Up to 909 conditions per place. [2023-01-27 17:42:36,863 INFO L137 encePairwiseOnDemand]: 297/303 looper letters, 173 selfloop transitions, 22 changer transitions 0/195 dead transitions. [2023-01-27 17:42:36,863 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 195 transitions, 934 flow [2023-01-27 17:42:36,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-27 17:42:36,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-27 17:42:36,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1584 transitions. [2023-01-27 17:42:36,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5227722772277228 [2023-01-27 17:42:36,872 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1584 transitions. [2023-01-27 17:42:36,872 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1584 transitions. [2023-01-27 17:42:36,872 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:42:36,872 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1584 transitions. [2023-01-27 17:42:36,875 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 158.4) internal successors, (1584), 10 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:42:36,878 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 303.0) internal successors, (3333), 11 states have internal predecessors, (3333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:42:36,879 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 303.0) internal successors, (3333), 11 states have internal predecessors, (3333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:42:36,879 INFO L175 Difference]: Start difference. First operand has 39 places, 38 transitions, 122 flow. Second operand 10 states and 1584 transitions. [2023-01-27 17:42:36,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 195 transitions, 934 flow [2023-01-27 17:42:36,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 195 transitions, 921 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-27 17:42:36,888 INFO L231 Difference]: Finished difference. Result has 51 places, 56 transitions, 280 flow [2023-01-27 17:42:36,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=303, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=280, PETRI_PLACES=51, PETRI_TRANSITIONS=56} [2023-01-27 17:42:36,889 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 16 predicate places. [2023-01-27 17:42:36,889 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 56 transitions, 280 flow [2023-01-27 17:42:36,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 142.375) internal successors, (1139), 8 states have internal predecessors, (1139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:42:36,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:42:36,890 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 17:42:36,895 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-01-27 17:42:37,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 17:42:37,095 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-01-27 17:42:37,096 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:42:37,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1568042570, now seen corresponding path program 1 times [2023-01-27 17:42:37,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:42:37,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474008594] [2023-01-27 17:42:37,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:42:37,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:42:37,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:42:37,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 17:42:37,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:42:37,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474008594] [2023-01-27 17:42:37,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474008594] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:42:37,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:42:37,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 17:42:37,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707638588] [2023-01-27 17:42:37,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:42:37,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 17:42:37,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:42:37,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 17:42:37,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 17:42:37,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 303 [2023-01-27 17:42:37,183 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 56 transitions, 280 flow. Second operand has 3 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:42:37,183 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:42:37,184 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 303 [2023-01-27 17:42:37,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:42:37,290 INFO L130 PetriNetUnfolder]: 606/1135 cut-off events. [2023-01-27 17:42:37,290 INFO L131 PetriNetUnfolder]: For 415/415 co-relation queries the response was YES. [2023-01-27 17:42:37,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2770 conditions, 1135 events. 606/1135 cut-off events. For 415/415 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 4845 event pairs, 98 based on Foata normal form. 0/1055 useless extension candidates. Maximal degree in co-relation 2292. Up to 850 conditions per place. [2023-01-27 17:42:37,294 INFO L137 encePairwiseOnDemand]: 298/303 looper letters, 47 selfloop transitions, 5 changer transitions 0/55 dead transitions. [2023-01-27 17:42:37,294 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 55 transitions, 331 flow [2023-01-27 17:42:37,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 17:42:37,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 17:42:37,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 463 transitions. [2023-01-27 17:42:37,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5093509350935094 [2023-01-27 17:42:37,296 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 463 transitions. [2023-01-27 17:42:37,296 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 463 transitions. [2023-01-27 17:42:37,296 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:42:37,296 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 463 transitions. [2023-01-27 17:42:37,298 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 154.33333333333334) internal successors, (463), 3 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:42:37,299 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 303.0) internal successors, (1212), 4 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:42:37,299 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 303.0) internal successors, (1212), 4 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:42:37,299 INFO L175 Difference]: Start difference. First operand has 51 places, 56 transitions, 280 flow. Second operand 3 states and 463 transitions. [2023-01-27 17:42:37,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 55 transitions, 331 flow [2023-01-27 17:42:37,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 55 transitions, 319 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-01-27 17:42:37,302 INFO L231 Difference]: Finished difference. Result has 49 places, 46 transitions, 204 flow [2023-01-27 17:42:37,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=303, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=204, PETRI_PLACES=49, PETRI_TRANSITIONS=46} [2023-01-27 17:42:37,304 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 14 predicate places. [2023-01-27 17:42:37,305 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 46 transitions, 204 flow [2023-01-27 17:42:37,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:42:37,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:42:37,306 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 17:42:37,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-01-27 17:42:37,306 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-01-27 17:42:37,306 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:42:37,306 INFO L85 PathProgramCache]: Analyzing trace with hash 321710418, now seen corresponding path program 1 times [2023-01-27 17:42:37,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:42:37,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330278428] [2023-01-27 17:42:37,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:42:37,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:42:37,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:42:37,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 17:42:37,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:42:37,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330278428] [2023-01-27 17:42:37,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330278428] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:42:37,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:42:37,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-27 17:42:37,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189389153] [2023-01-27 17:42:37,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:42:37,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 17:42:37,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:42:37,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 17:42:37,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-01-27 17:42:37,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 303 [2023-01-27 17:42:37,382 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 46 transitions, 204 flow. Second operand has 5 states, 5 states have (on average 142.6) internal successors, (713), 5 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:42:37,382 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:42:37,382 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 303 [2023-01-27 17:42:37,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:42:37,562 INFO L130 PetriNetUnfolder]: 718/1317 cut-off events. [2023-01-27 17:42:37,562 INFO L131 PetriNetUnfolder]: For 378/378 co-relation queries the response was YES. [2023-01-27 17:42:37,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3320 conditions, 1317 events. 718/1317 cut-off events. For 378/378 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 5602 event pairs, 236 based on Foata normal form. 18/1335 useless extension candidates. Maximal degree in co-relation 2798. Up to 702 conditions per place. [2023-01-27 17:42:37,567 INFO L137 encePairwiseOnDemand]: 297/303 looper letters, 81 selfloop transitions, 14 changer transitions 0/95 dead transitions. [2023-01-27 17:42:37,568 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 95 transitions, 534 flow [2023-01-27 17:42:37,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 17:42:37,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 17:42:37,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 923 transitions. [2023-01-27 17:42:37,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5077007700770076 [2023-01-27 17:42:37,570 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 923 transitions. [2023-01-27 17:42:37,570 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 923 transitions. [2023-01-27 17:42:37,571 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:42:37,571 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 923 transitions. [2023-01-27 17:42:37,572 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 153.83333333333334) internal successors, (923), 6 states have internal predecessors, (923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:42:37,574 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 303.0) internal successors, (2121), 7 states have internal predecessors, (2121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:42:37,574 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 303.0) internal successors, (2121), 7 states have internal predecessors, (2121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:42:37,574 INFO L175 Difference]: Start difference. First operand has 49 places, 46 transitions, 204 flow. Second operand 6 states and 923 transitions. [2023-01-27 17:42:37,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 95 transitions, 534 flow [2023-01-27 17:42:37,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 95 transitions, 521 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-27 17:42:37,579 INFO L231 Difference]: Finished difference. Result has 56 places, 48 transitions, 271 flow [2023-01-27 17:42:37,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=303, PETRI_DIFFERENCE_MINUEND_FLOW=183, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=271, PETRI_PLACES=56, PETRI_TRANSITIONS=48} [2023-01-27 17:42:37,581 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 21 predicate places. [2023-01-27 17:42:37,581 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 48 transitions, 271 flow [2023-01-27 17:42:37,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 142.6) internal successors, (713), 5 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:42:37,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:42:37,583 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] [2023-01-27 17:42:37,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-01-27 17:42:37,584 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-01-27 17:42:37,585 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:42:37,585 INFO L85 PathProgramCache]: Analyzing trace with hash -2070456889, now seen corresponding path program 1 times [2023-01-27 17:42:37,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:42:37,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470027751] [2023-01-27 17:42:37,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:42:37,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:42:37,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:42:38,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 17:42:38,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:42:38,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470027751] [2023-01-27 17:42:38,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470027751] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:42:38,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:42:38,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-01-27 17:42:38,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844571547] [2023-01-27 17:42:38,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:42:38,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-01-27 17:42:38,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:42:38,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-01-27 17:42:38,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2023-01-27 17:42:38,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 303 [2023-01-27 17:42:38,328 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 48 transitions, 271 flow. Second operand has 16 states, 16 states have (on average 96.375) internal successors, (1542), 16 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:42:38,328 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:42:38,328 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 303 [2023-01-27 17:42:38,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:42:39,096 INFO L130 PetriNetUnfolder]: 1006/1842 cut-off events. [2023-01-27 17:42:39,096 INFO L131 PetriNetUnfolder]: For 1064/1064 co-relation queries the response was YES. [2023-01-27 17:42:39,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4739 conditions, 1842 events. 1006/1842 cut-off events. For 1064/1064 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 8702 event pairs, 306 based on Foata normal form. 4/1828 useless extension candidates. Maximal degree in co-relation 3526. Up to 1181 conditions per place. [2023-01-27 17:42:39,103 INFO L137 encePairwiseOnDemand]: 286/303 looper letters, 136 selfloop transitions, 23 changer transitions 3/162 dead transitions. [2023-01-27 17:42:39,103 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 162 transitions, 917 flow [2023-01-27 17:42:39,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-27 17:42:39,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-27 17:42:39,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1478 transitions. [2023-01-27 17:42:39,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34842055634134844 [2023-01-27 17:42:39,107 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1478 transitions. [2023-01-27 17:42:39,107 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1478 transitions. [2023-01-27 17:42:39,108 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:42:39,108 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1478 transitions. [2023-01-27 17:42:39,110 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 105.57142857142857) internal successors, (1478), 14 states have internal predecessors, (1478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:42:39,114 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 303.0) internal successors, (4545), 15 states have internal predecessors, (4545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:42:39,115 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 303.0) internal successors, (4545), 15 states have internal predecessors, (4545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:42:39,115 INFO L175 Difference]: Start difference. First operand has 56 places, 48 transitions, 271 flow. Second operand 14 states and 1478 transitions. [2023-01-27 17:42:39,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 162 transitions, 917 flow [2023-01-27 17:42:39,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 162 transitions, 894 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-01-27 17:42:39,119 INFO L231 Difference]: Finished difference. Result has 78 places, 70 transitions, 465 flow [2023-01-27 17:42:39,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=303, PETRI_DIFFERENCE_MINUEND_FLOW=255, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=465, PETRI_PLACES=78, PETRI_TRANSITIONS=70} [2023-01-27 17:42:39,119 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 43 predicate places. [2023-01-27 17:42:39,120 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 70 transitions, 465 flow [2023-01-27 17:42:39,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 96.375) internal successors, (1542), 16 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:42:39,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:42:39,120 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] [2023-01-27 17:42:39,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-01-27 17:42:39,120 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-01-27 17:42:39,121 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:42:39,121 INFO L85 PathProgramCache]: Analyzing trace with hash -734851743, now seen corresponding path program 2 times [2023-01-27 17:42:39,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:42:39,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009340945] [2023-01-27 17:42:39,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:42:39,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:42:39,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:42:39,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 17:42:39,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:42:39,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009340945] [2023-01-27 17:42:39,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009340945] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:42:39,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:42:39,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-01-27 17:42:39,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513747330] [2023-01-27 17:42:39,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:42:39,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-01-27 17:42:39,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:42:39,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-01-27 17:42:39,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2023-01-27 17:42:39,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 303 [2023-01-27 17:42:39,904 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 70 transitions, 465 flow. Second operand has 16 states, 16 states have (on average 96.375) internal successors, (1542), 16 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:42:39,904 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:42:39,904 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 303 [2023-01-27 17:42:39,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:42:40,721 INFO L130 PetriNetUnfolder]: 1244/2276 cut-off events. [2023-01-27 17:42:40,722 INFO L131 PetriNetUnfolder]: For 1796/1796 co-relation queries the response was YES. [2023-01-27 17:42:40,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6565 conditions, 2276 events. 1244/2276 cut-off events. For 1796/1796 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 10700 event pairs, 350 based on Foata normal form. 4/2256 useless extension candidates. Maximal degree in co-relation 4346. Up to 1108 conditions per place. [2023-01-27 17:42:40,733 INFO L137 encePairwiseOnDemand]: 287/303 looper letters, 138 selfloop transitions, 36 changer transitions 3/177 dead transitions. [2023-01-27 17:42:40,733 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 177 transitions, 1195 flow [2023-01-27 17:42:40,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-27 17:42:40,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-27 17:42:40,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1478 transitions. [2023-01-27 17:42:40,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34842055634134844 [2023-01-27 17:42:40,736 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1478 transitions. [2023-01-27 17:42:40,736 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1478 transitions. [2023-01-27 17:42:40,737 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:42:40,737 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1478 transitions. [2023-01-27 17:42:40,739 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 105.57142857142857) internal successors, (1478), 14 states have internal predecessors, (1478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:42:40,743 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 303.0) internal successors, (4545), 15 states have internal predecessors, (4545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:42:40,744 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 303.0) internal successors, (4545), 15 states have internal predecessors, (4545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:42:40,744 INFO L175 Difference]: Start difference. First operand has 78 places, 70 transitions, 465 flow. Second operand 14 states and 1478 transitions. [2023-01-27 17:42:40,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 177 transitions, 1195 flow [2023-01-27 17:42:40,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 177 transitions, 1191 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-01-27 17:42:40,751 INFO L231 Difference]: Finished difference. Result has 100 places, 86 transitions, 730 flow [2023-01-27 17:42:40,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=303, PETRI_DIFFERENCE_MINUEND_FLOW=461, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=730, PETRI_PLACES=100, PETRI_TRANSITIONS=86} [2023-01-27 17:42:40,752 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 65 predicate places. [2023-01-27 17:42:40,752 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 86 transitions, 730 flow [2023-01-27 17:42:40,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 96.375) internal successors, (1542), 16 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:42:40,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:42:40,753 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 17:42:40,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-01-27 17:42:40,753 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-01-27 17:42:40,753 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:42:40,753 INFO L85 PathProgramCache]: Analyzing trace with hash -2144319276, now seen corresponding path program 1 times [2023-01-27 17:42:40,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:42:40,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648936863] [2023-01-27 17:42:40,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:42:40,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:42:40,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 17:42:40,772 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 17:42:40,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 17:42:40,800 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 17:42:40,800 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 17:42:40,801 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 6 remaining) [2023-01-27 17:42:40,802 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 6 remaining) [2023-01-27 17:42:40,802 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2023-01-27 17:42:40,802 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-01-27 17:42:40,802 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-01-27 17:42:40,802 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-01-27 17:42:40,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-01-27 17:42:40,802 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 17:42:40,806 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-01-27 17:42:40,806 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-01-27 17:42:40,848 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.01 05:42:40 BasicIcfg [2023-01-27 17:42:40,849 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-01-27 17:42:40,849 INFO L158 Benchmark]: Toolchain (without parser) took 9942.10ms. Allocated memory was 329.3MB in the beginning and 476.1MB in the end (delta: 146.8MB). Free memory was 275.8MB in the beginning and 287.6MB in the end (delta: -11.8MB). Peak memory consumption was 138.1MB. Max. memory is 16.0GB. [2023-01-27 17:42:40,849 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 255.9MB. Free memory is still 213.5MB. There was no memory consumed. Max. memory is 16.0GB. [2023-01-27 17:42:40,849 INFO L158 Benchmark]: CACSL2BoogieTranslator took 481.30ms. Allocated memory is still 329.3MB. Free memory was 275.5MB in the beginning and 290.4MB in the end (delta: -14.9MB). Peak memory consumption was 20.5MB. Max. memory is 16.0GB. [2023-01-27 17:42:40,849 INFO L158 Benchmark]: Boogie Procedure Inliner took 52.97ms. Allocated memory is still 329.3MB. Free memory was 290.4MB in the beginning and 287.7MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-27 17:42:40,850 INFO L158 Benchmark]: Boogie Preprocessor took 29.22ms. Allocated memory is still 329.3MB. Free memory was 287.7MB in the beginning and 286.2MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-27 17:42:40,850 INFO L158 Benchmark]: RCFGBuilder took 366.66ms. Allocated memory is still 329.3MB. Free memory was 286.2MB in the beginning and 268.1MB in the end (delta: 18.1MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. [2023-01-27 17:42:40,850 INFO L158 Benchmark]: TraceAbstraction took 9008.11ms. Allocated memory was 329.3MB in the beginning and 476.1MB in the end (delta: 146.8MB). Free memory was 267.9MB in the beginning and 287.6MB in the end (delta: -19.7MB). Peak memory consumption was 128.1MB. Max. memory is 16.0GB. [2023-01-27 17:42:40,852 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 255.9MB. Free memory is still 213.5MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 481.30ms. Allocated memory is still 329.3MB. Free memory was 275.5MB in the beginning and 290.4MB in the end (delta: -14.9MB). Peak memory consumption was 20.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 52.97ms. Allocated memory is still 329.3MB. Free memory was 290.4MB in the beginning and 287.7MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 29.22ms. Allocated memory is still 329.3MB. Free memory was 287.7MB in the beginning and 286.2MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 366.66ms. Allocated memory is still 329.3MB. Free memory was 286.2MB in the beginning and 268.1MB in the end (delta: 18.1MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. * TraceAbstraction took 9008.11ms. Allocated memory was 329.3MB in the beginning and 476.1MB in the end (delta: 146.8MB). Free memory was 267.9MB in the beginning and 287.6MB in the end (delta: -19.7MB). Peak memory consumption was 128.1MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.1s, 148 PlacesBefore, 35 PlacesAfterwards, 151 TransitionsBefore, 33 TransitionsAfterwards, 7334 CoEnabledTransitionPairs, 6 FixpointIterations, 30 TrivialSequentialCompositions, 84 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 22 ConcurrentYvCompositions, 5 ChoiceCompositions, 141 TotalNumberOfCompositions, 9688 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 6870, independent: 6685, independent conditional: 0, independent unconditional: 6685, dependent: 185, dependent conditional: 0, dependent unconditional: 185, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 4087, independent: 4036, independent conditional: 0, independent unconditional: 4036, dependent: 51, dependent conditional: 0, dependent unconditional: 51, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 6870, independent: 2649, independent conditional: 0, independent unconditional: 2649, dependent: 134, dependent conditional: 0, dependent unconditional: 134, unknown: 4087, unknown conditional: 0, unknown unconditional: 4087] , Statistics on independence cache: Total cache size (in pairs): 168, Positive cache size: 151, Positive conditional cache size: 0, Positive unconditional cache size: 151, Negative cache size: 17, Negative conditional cache size: 0, Negative unconditional cache size: 17, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - CounterExampleResult [Line: 941]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L935] 0 static int top=0; [L936] 0 static unsigned int arr[(5)]; [L937] 0 pthread_mutex_t m; [L938] 0 _Bool flag=(0); [L1021] 0 pthread_t id1, id2; [L1023] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arr={3:0}, flag=0, id1={9:0}, id2={6:0}, m={4:0}, pthread_create(&id1, ((void *)0), t1, ((void *)0))=13, top=0] [L990] 1 int i; [L991] 1 unsigned int tmp; [L992] 1 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L1024] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arr={3:0}, flag=0, id1={9:0}, id2={6:0}, m={4:0}, pthread_create(&id2, ((void *)0), t2, ((void *)0))=14, top=0] [L1006] 2 int i; [L1007] 2 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L992] COND TRUE 1 i<(5) [L995] 1 tmp = __VERIFIER_nondet_uint() [L996] CALL 1 assume_abort_if_not(tmp < (5)) [L23] COND FALSE 1 !(!cond) [L996] RET 1 assume_abort_if_not(tmp < (5)) [L997] CALL, EXPR 1 push(arr,tmp) [L962] COND FALSE 1 !(top==(5)) [L969] CALL, EXPR 1 get_top() [L954] 1 return top; [L969] RET, EXPR 1 get_top() [L969] 1 stack[get_top()] = x [L970] CALL 1 inc_top() [L946] 1 top++ [L970] RET 1 inc_top() [L972] 1 return 0; [L997] RET, EXPR 1 push(arr,tmp) [L997] COND FALSE 1 !(push(arr,tmp)==(-1)) [L999] 1 flag=(1) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=0, m={4:0}, tmp=4, top=1] [L992] 1 i++ VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, tmp=4, top=1] [L1007] COND TRUE 2 i<(5) [L1010] COND TRUE 2 \read(flag) [L1012] CALL, EXPR 2 pop(arr) [L976] CALL, EXPR 2 get_top() [L954] 2 return top; VAL [\result=0, \result=1, arr={3:0}, flag=1, m={4:0}, top=1] [L976] RET, EXPR 2 get_top() [L976] COND FALSE 2 !(get_top()==0) [L983] CALL 2 dec_top() [L950] 2 top-- VAL [arr={3:0}, flag=1, m={4:0}, top=0] [L983] RET 2 dec_top() [L984] CALL, EXPR 2 get_top() [L954] 2 return top; [L984] RET, EXPR 2 get_top() [L984] EXPR 2 stack[get_top()] [L984] 2 return stack[get_top()]; [L1012] RET, EXPR 2 pop(arr) [L1012] COND FALSE 2 !(!(pop(arr)!=(-2))) [L1007] 2 i++ VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, top=0] [L1007] COND TRUE 2 i<(5) [L1010] COND TRUE 2 \read(flag) [L1012] CALL, EXPR 2 pop(arr) [L976] CALL, EXPR 2 get_top() [L954] 2 return top; [L976] RET, EXPR 2 get_top() [L976] COND TRUE 2 get_top()==0 [L979] 2 return (-2); [L1012] RET, EXPR 2 pop(arr) [L1012] COND TRUE 2 !(pop(arr)!=(-2)) [L1013] CALL 2 error() [L941] 2 reach_error() VAL [arr={3:0}, flag=1, m={4:0}, top=0] - UnprovableResult [Line: 1023]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 1024]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 941]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 254 locations, 6 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 8.8s, OverallIterations: 9, TraceHistogramMax: 2, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 3.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.2s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 521 SdHoareTripleChecker+Valid, 1.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 521 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 1.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 26 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3262 IncrementalHoareTripleChecker+Invalid, 3288 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 26 mSolverCounterUnsat, 0 mSDtfsCounter, 3262 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 94 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=730occurred in iteration=8, InterpolantAutomatonStates: 56, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.0s InterpolantComputationTime, 158 NumberOfCodeBlocks, 158 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 136 ConstructedInterpolants, 0 QuantifiedInterpolants, 1281 SizeOfPredicates, 1 NumberOfNonLiveVariables, 193 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 10 InterpolantComputations, 7 PerfectInterpolantSequences, 3/9 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-01-27 17:42:40,868 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 Received shutdown request...