/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-deagle/circular_buffer_bad.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-27 23:24:22,441 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-27 23:24:22,443 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-27 23:24:22,469 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-27 23:24:22,469 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-27 23:24:22,470 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-27 23:24:22,471 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-27 23:24:22,473 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-27 23:24:22,476 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-27 23:24:22,479 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-27 23:24:22,480 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-27 23:24:22,482 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-27 23:24:22,482 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-27 23:24:22,485 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-27 23:24:22,486 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-27 23:24:22,490 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-27 23:24:22,490 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-27 23:24:22,491 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-27 23:24:22,493 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-27 23:24:22,496 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-27 23:24:22,497 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-27 23:24:22,498 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-27 23:24:22,499 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-27 23:24:22,499 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-27 23:24:22,501 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-01-27 23:24:22,502 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-27 23:24:22,502 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-27 23:24:22,503 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-27 23:24:22,503 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-27 23:24:22,504 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-27 23:24:22,504 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-27 23:24:22,504 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-27 23:24:22,504 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-27 23:24:22,504 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-27 23:24:22,505 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-27 23:24:22,513 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-27 23:24:22,517 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 23:24:22,540 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-27 23:24:22,541 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-27 23:24:22,541 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-27 23:24:22,541 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-27 23:24:22,542 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-27 23:24:22,542 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-27 23:24:22,542 INFO L138 SettingsManager]: * Use SBE=true [2023-01-27 23:24:22,542 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-27 23:24:22,543 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-27 23:24:22,543 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-27 23:24:22,543 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-27 23:24:22,543 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-27 23:24:22,543 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-27 23:24:22,544 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-27 23:24:22,544 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-27 23:24:22,544 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-27 23:24:22,544 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-27 23:24:22,544 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-27 23:24:22,544 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-27 23:24:22,544 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-27 23:24:22,544 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-27 23:24:22,544 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-27 23:24:22,544 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-27 23:24:22,544 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 23:24:22,545 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-27 23:24:22,545 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-27 23:24:22,545 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-27 23:24:22,545 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-27 23:24:22,545 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-27 23:24:22,545 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-27 23:24:22,545 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-27 23:24:22,545 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-01-27 23:24:22,696 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-27 23:24:22,709 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-27 23:24:22,711 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-27 23:24:22,712 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-27 23:24:22,712 INFO L275 PluginConnector]: CDTParser initialized [2023-01-27 23:24:22,713 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-deagle/circular_buffer_bad.i [2023-01-27 23:24:23,631 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-27 23:24:23,838 INFO L351 CDTParser]: Found 1 translation units. [2023-01-27 23:24:23,838 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/circular_buffer_bad.i [2023-01-27 23:24:23,853 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/457999e2f/402538d602314326998427e70d7889a5/FLAGbd83e387c [2023-01-27 23:24:24,198 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/457999e2f/402538d602314326998427e70d7889a5 [2023-01-27 23:24:24,199 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-27 23:24:24,200 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-27 23:24:24,202 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-27 23:24:24,202 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-27 23:24:24,203 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-27 23:24:24,204 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 11:24:24" (1/1) ... [2023-01-27 23:24:24,204 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@da6a526 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:24:24, skipping insertion in model container [2023-01-27 23:24:24,205 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 11:24:24" (1/1) ... [2023-01-27 23:24:24,209 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-27 23:24:24,231 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-27 23:24:24,380 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-deagle/circular_buffer_bad.i[30440,30453] [2023-01-27 23:24:24,385 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-deagle/circular_buffer_bad.i[30895,30908] [2023-01-27 23:24:24,388 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 23:24:24,396 INFO L203 MainTranslator]: Completed pre-run [2023-01-27 23:24:24,442 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-deagle/circular_buffer_bad.i[30440,30453] [2023-01-27 23:24:24,444 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-deagle/circular_buffer_bad.i[30895,30908] [2023-01-27 23:24:24,446 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 23:24:24,474 INFO L208 MainTranslator]: Completed translation [2023-01-27 23:24:24,474 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:24:24 WrapperNode [2023-01-27 23:24:24,474 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-27 23:24:24,475 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-27 23:24:24,475 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-27 23:24:24,475 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-27 23:24:24,479 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:24:24" (1/1) ... [2023-01-27 23:24:24,506 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:24:24" (1/1) ... [2023-01-27 23:24:24,523 INFO L138 Inliner]: procedures = 168, calls = 36, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 135 [2023-01-27 23:24:24,523 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-27 23:24:24,523 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-27 23:24:24,523 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-27 23:24:24,524 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-27 23:24:24,530 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:24:24" (1/1) ... [2023-01-27 23:24:24,530 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:24:24" (1/1) ... [2023-01-27 23:24:24,556 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:24:24" (1/1) ... [2023-01-27 23:24:24,556 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:24:24" (1/1) ... [2023-01-27 23:24:24,564 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:24:24" (1/1) ... [2023-01-27 23:24:24,566 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:24:24" (1/1) ... [2023-01-27 23:24:24,567 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:24:24" (1/1) ... [2023-01-27 23:24:24,568 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:24:24" (1/1) ... [2023-01-27 23:24:24,570 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-27 23:24:24,570 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-27 23:24:24,570 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-27 23:24:24,570 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-27 23:24:24,571 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:24:24" (1/1) ... [2023-01-27 23:24:24,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 23:24:24,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:24:24,592 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 23:24:24,594 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 23:24:24,626 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-27 23:24:24,626 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-01-27 23:24:24,626 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-01-27 23:24:24,626 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-01-27 23:24:24,626 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-01-27 23:24:24,626 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-27 23:24:24,626 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-01-27 23:24:24,627 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-27 23:24:24,627 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-27 23:24:24,627 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-27 23:24:24,627 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-01-27 23:24:24,627 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-27 23:24:24,627 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-27 23:24:24,627 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-27 23:24:24,628 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 23:24:24,787 INFO L236 CfgBuilder]: Building ICFG [2023-01-27 23:24:24,788 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-27 23:24:24,991 INFO L277 CfgBuilder]: Performing block encoding [2023-01-27 23:24:24,997 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-27 23:24:24,997 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-01-27 23:24:24,998 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 11:24:24 BoogieIcfgContainer [2023-01-27 23:24:24,998 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-27 23:24:25,000 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-27 23:24:25,000 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-27 23:24:25,002 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-27 23:24:25,002 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 11:24:24" (1/3) ... [2023-01-27 23:24:25,002 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f8fac80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 11:24:25, skipping insertion in model container [2023-01-27 23:24:25,002 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:24:24" (2/3) ... [2023-01-27 23:24:25,002 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f8fac80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 11:24:25, skipping insertion in model container [2023-01-27 23:24:25,003 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 11:24:24" (3/3) ... [2023-01-27 23:24:25,003 INFO L112 eAbstractionObserver]: Analyzing ICFG circular_buffer_bad.i [2023-01-27 23:24:25,028 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-27 23:24:25,028 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-01-27 23:24:25,028 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-27 23:24:25,098 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-27 23:24:25,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 137 places, 140 transitions, 296 flow [2023-01-27 23:24:25,164 INFO L130 PetriNetUnfolder]: 10/138 cut-off events. [2023-01-27 23:24:25,165 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 23:24:25,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147 conditions, 138 events. 10/138 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 251 event pairs, 0 based on Foata normal form. 0/126 useless extension candidates. Maximal degree in co-relation 86. Up to 2 conditions per place. [2023-01-27 23:24:25,170 INFO L82 GeneralOperation]: Start removeDead. Operand has 137 places, 140 transitions, 296 flow [2023-01-27 23:24:25,173 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 126 places, 129 transitions, 267 flow [2023-01-27 23:24:25,175 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 23:24:25,181 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 126 places, 129 transitions, 267 flow [2023-01-27 23:24:25,183 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 126 places, 129 transitions, 267 flow [2023-01-27 23:24:25,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 126 places, 129 transitions, 267 flow [2023-01-27 23:24:25,208 INFO L130 PetriNetUnfolder]: 10/129 cut-off events. [2023-01-27 23:24:25,208 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-27 23:24:25,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137 conditions, 129 events. 10/129 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 235 event pairs, 0 based on Foata normal form. 0/117 useless extension candidates. Maximal degree in co-relation 86. Up to 2 conditions per place. [2023-01-27 23:24:25,211 INFO L119 LiptonReduction]: Number of co-enabled transitions 3840 [2023-01-27 23:24:28,807 INFO L134 LiptonReduction]: Checked pairs total: 8363 [2023-01-27 23:24:28,808 INFO L136 LiptonReduction]: Total number of compositions: 111 [2023-01-27 23:24:28,820 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 23:24:28,824 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;@21adb567, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 23:24:28,824 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-01-27 23:24:28,842 INFO L130 PetriNetUnfolder]: 2/21 cut-off events. [2023-01-27 23:24:28,842 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-27 23:24:28,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:24:28,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:24:28,842 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 23:24:28,845 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:24:28,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1708763483, now seen corresponding path program 1 times [2023-01-27 23:24:28,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:24:28,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446388840] [2023-01-27 23:24:28,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:24:28,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:24:28,954 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-01-27 23:24:28,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [267353141] [2023-01-27 23:24:28,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:24:28,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:24:28,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:24:28,959 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 23:24:28,964 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 23:24:29,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:24:29,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 4 conjunts are in the unsatisfiable core [2023-01-27 23:24:29,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:24:29,053 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 23:24:29,053 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-27 23:24:29,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:24:29,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446388840] [2023-01-27 23:24:29,054 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-01-27 23:24:29,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267353141] [2023-01-27 23:24:29,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267353141] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 23:24:29,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 23:24:29,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 23:24:29,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135280889] [2023-01-27 23:24:29,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 23:24:29,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 23:24:29,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:24:29,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 23:24:29,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 23:24:29,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 251 [2023-01-27 23:24:29,087 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 34 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 119.33333333333333) internal successors, (358), 3 states have internal predecessors, (358), 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 23:24:29,087 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:24:29,087 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 251 [2023-01-27 23:24:29,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:24:29,230 INFO L130 PetriNetUnfolder]: 417/682 cut-off events. [2023-01-27 23:24:29,230 INFO L131 PetriNetUnfolder]: For 35/35 co-relation queries the response was YES. [2023-01-27 23:24:29,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1344 conditions, 682 events. 417/682 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2735 event pairs, 297 based on Foata normal form. 0/521 useless extension candidates. Maximal degree in co-relation 1238. Up to 626 conditions per place. [2023-01-27 23:24:29,238 INFO L137 encePairwiseOnDemand]: 249/251 looper letters, 28 selfloop transitions, 1 changer transitions 0/33 dead transitions. [2023-01-27 23:24:29,238 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 33 transitions, 133 flow [2023-01-27 23:24:29,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 23:24:29,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 23:24:29,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 381 transitions. [2023-01-27 23:24:29,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5059760956175299 [2023-01-27 23:24:29,257 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 381 transitions. [2023-01-27 23:24:29,257 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 381 transitions. [2023-01-27 23:24:29,259 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:24:29,261 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 381 transitions. [2023-01-27 23:24:29,265 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 127.0) internal successors, (381), 3 states have internal predecessors, (381), 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 23:24:29,273 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 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 23:24:29,297 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 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 23:24:29,298 INFO L175 Difference]: Start difference. First operand has 35 places, 34 transitions, 77 flow. Second operand 3 states and 381 transitions. [2023-01-27 23:24:29,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 33 transitions, 133 flow [2023-01-27 23:24:29,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 33 transitions, 128 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-01-27 23:24:29,303 INFO L231 Difference]: Finished difference. Result has 33 places, 33 transitions, 72 flow [2023-01-27 23:24:29,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=72, PETRI_PLACES=33, PETRI_TRANSITIONS=33} [2023-01-27 23:24:29,307 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, -2 predicate places. [2023-01-27 23:24:29,307 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 33 transitions, 72 flow [2023-01-27 23:24:29,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 119.33333333333333) internal successors, (358), 3 states have internal predecessors, (358), 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 23:24:29,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:24:29,308 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:24:29,313 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 23:24:29,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-01-27 23:24:29,515 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 23:24:29,515 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:24:29,516 INFO L85 PathProgramCache]: Analyzing trace with hash 306299020, now seen corresponding path program 1 times [2023-01-27 23:24:29,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:24:29,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993891344] [2023-01-27 23:24:29,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:24:29,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:24:29,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:24:29,743 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 23:24:29,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:24:29,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993891344] [2023-01-27 23:24:29,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993891344] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 23:24:29,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 23:24:29,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 23:24:29,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710663999] [2023-01-27 23:24:29,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 23:24:29,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 23:24:29,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:24:29,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 23:24:29,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 23:24:29,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 251 [2023-01-27 23:24:29,746 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 33 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 127.0) internal successors, (381), 3 states have internal predecessors, (381), 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 23:24:29,746 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:24:29,746 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 251 [2023-01-27 23:24:29,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:24:29,853 INFO L130 PetriNetUnfolder]: 592/999 cut-off events. [2023-01-27 23:24:29,854 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-01-27 23:24:29,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2001 conditions, 999 events. 592/999 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 3921 event pairs, 228 based on Foata normal form. 0/782 useless extension candidates. Maximal degree in co-relation 1995. Up to 585 conditions per place. [2023-01-27 23:24:29,857 INFO L137 encePairwiseOnDemand]: 247/251 looper letters, 46 selfloop transitions, 3 changer transitions 2/54 dead transitions. [2023-01-27 23:24:29,857 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 54 transitions, 219 flow [2023-01-27 23:24:29,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 23:24:29,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 23:24:29,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 424 transitions. [2023-01-27 23:24:29,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5630810092961488 [2023-01-27 23:24:29,859 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 424 transitions. [2023-01-27 23:24:29,859 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 424 transitions. [2023-01-27 23:24:29,859 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:24:29,860 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 424 transitions. [2023-01-27 23:24:29,860 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 141.33333333333334) internal successors, (424), 3 states have internal predecessors, (424), 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 23:24:29,862 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 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 23:24:29,862 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 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 23:24:29,862 INFO L175 Difference]: Start difference. First operand has 33 places, 33 transitions, 72 flow. Second operand 3 states and 424 transitions. [2023-01-27 23:24:29,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 54 transitions, 219 flow [2023-01-27 23:24:29,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 54 transitions, 218 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-27 23:24:29,864 INFO L231 Difference]: Finished difference. Result has 35 places, 33 transitions, 84 flow [2023-01-27 23:24:29,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=71, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=35, PETRI_TRANSITIONS=33} [2023-01-27 23:24:29,865 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 0 predicate places. [2023-01-27 23:24:29,865 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 33 transitions, 84 flow [2023-01-27 23:24:29,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 127.0) internal successors, (381), 3 states have internal predecessors, (381), 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 23:24:29,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:24:29,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:24:29,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-27 23:24:29,866 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-01-27 23:24:29,867 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:24:29,867 INFO L85 PathProgramCache]: Analyzing trace with hash 501019712, now seen corresponding path program 1 times [2023-01-27 23:24:29,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:24:29,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416617476] [2023-01-27 23:24:29,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:24:29,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:24:29,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:24:30,011 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 23:24:30,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:24:30,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416617476] [2023-01-27 23:24:30,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416617476] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 23:24:30,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 23:24:30,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 23:24:30,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857574960] [2023-01-27 23:24:30,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 23:24:30,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 23:24:30,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:24:30,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 23:24:30,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 23:24:30,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 251 [2023-01-27 23:24:30,014 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 33 transitions, 84 flow. Second operand has 3 states, 3 states have (on average 120.33333333333333) internal successors, (361), 3 states have internal predecessors, (361), 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 23:24:30,014 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:24:30,014 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 251 [2023-01-27 23:24:30,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:24:30,080 INFO L130 PetriNetUnfolder]: 342/599 cut-off events. [2023-01-27 23:24:30,080 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2023-01-27 23:24:30,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1261 conditions, 599 events. 342/599 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 2266 event pairs, 64 based on Foata normal form. 26/569 useless extension candidates. Maximal degree in co-relation 1253. Up to 416 conditions per place. [2023-01-27 23:24:30,083 INFO L137 encePairwiseOnDemand]: 247/251 looper letters, 36 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2023-01-27 23:24:30,083 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 43 transitions, 187 flow [2023-01-27 23:24:30,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 23:24:30,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 23:24:30,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 390 transitions. [2023-01-27 23:24:30,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5179282868525896 [2023-01-27 23:24:30,084 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 390 transitions. [2023-01-27 23:24:30,084 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 390 transitions. [2023-01-27 23:24:30,085 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:24:30,085 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 390 transitions. [2023-01-27 23:24:30,085 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 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 23:24:30,086 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 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 23:24:30,087 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 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 23:24:30,087 INFO L175 Difference]: Start difference. First operand has 35 places, 33 transitions, 84 flow. Second operand 3 states and 390 transitions. [2023-01-27 23:24:30,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 43 transitions, 187 flow [2023-01-27 23:24:30,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 43 transitions, 184 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-27 23:24:30,089 INFO L231 Difference]: Finished difference. Result has 35 places, 33 transitions, 89 flow [2023-01-27 23:24:30,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=81, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=89, PETRI_PLACES=35, PETRI_TRANSITIONS=33} [2023-01-27 23:24:30,090 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 0 predicate places. [2023-01-27 23:24:30,090 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 33 transitions, 89 flow [2023-01-27 23:24:30,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 120.33333333333333) internal successors, (361), 3 states have internal predecessors, (361), 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 23:24:30,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:24:30,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:24:30,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-27 23:24:30,091 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-01-27 23:24:30,092 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:24:30,092 INFO L85 PathProgramCache]: Analyzing trace with hash 944092763, now seen corresponding path program 1 times [2023-01-27 23:24:30,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:24:30,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579447092] [2023-01-27 23:24:30,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:24:30,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:24:30,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:24:30,272 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 23:24:30,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:24:30,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579447092] [2023-01-27 23:24:30,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579447092] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 23:24:30,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 23:24:30,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 23:24:30,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656463679] [2023-01-27 23:24:30,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 23:24:30,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 23:24:30,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:24:30,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 23:24:30,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 23:24:30,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 251 [2023-01-27 23:24:30,275 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 33 transitions, 89 flow. Second operand has 3 states, 3 states have (on average 121.33333333333333) internal successors, (364), 3 states have internal predecessors, (364), 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 23:24:30,275 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:24:30,276 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 251 [2023-01-27 23:24:30,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:24:30,386 INFO L130 PetriNetUnfolder]: 344/643 cut-off events. [2023-01-27 23:24:30,393 INFO L131 PetriNetUnfolder]: For 41/41 co-relation queries the response was YES. [2023-01-27 23:24:30,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1382 conditions, 643 events. 344/643 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 2376 event pairs, 129 based on Foata normal form. 0/601 useless extension candidates. Maximal degree in co-relation 1374. Up to 415 conditions per place. [2023-01-27 23:24:30,396 INFO L137 encePairwiseOnDemand]: 248/251 looper letters, 39 selfloop transitions, 2 changer transitions 3/49 dead transitions. [2023-01-27 23:24:30,396 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 49 transitions, 216 flow [2023-01-27 23:24:30,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 23:24:30,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 23:24:30,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 396 transitions. [2023-01-27 23:24:30,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5258964143426295 [2023-01-27 23:24:30,398 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 396 transitions. [2023-01-27 23:24:30,398 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 396 transitions. [2023-01-27 23:24:30,398 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:24:30,398 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 396 transitions. [2023-01-27 23:24:30,399 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 132.0) internal successors, (396), 3 states have internal predecessors, (396), 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 23:24:30,400 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 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 23:24:30,400 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 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 23:24:30,400 INFO L175 Difference]: Start difference. First operand has 35 places, 33 transitions, 89 flow. Second operand 3 states and 396 transitions. [2023-01-27 23:24:30,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 49 transitions, 216 flow [2023-01-27 23:24:30,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 49 transitions, 210 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-27 23:24:30,403 INFO L231 Difference]: Finished difference. Result has 37 places, 34 transitions, 97 flow [2023-01-27 23:24:30,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=97, PETRI_PLACES=37, PETRI_TRANSITIONS=34} [2023-01-27 23:24:30,404 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 2 predicate places. [2023-01-27 23:24:30,404 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 34 transitions, 97 flow [2023-01-27 23:24:30,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.33333333333333) internal successors, (364), 3 states have internal predecessors, (364), 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 23:24:30,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:24:30,405 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 23:24:30,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-01-27 23:24:30,405 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 23:24:30,406 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:24:30,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1856592171, now seen corresponding path program 1 times [2023-01-27 23:24:30,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:24:30,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716097579] [2023-01-27 23:24:30,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:24:30,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:24:30,418 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-01-27 23:24:30,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1997126422] [2023-01-27 23:24:30,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:24:30,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:24:30,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:24:30,420 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 23:24:30,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-01-27 23:24:30,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:24:30,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-27 23:24:30,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:24:30,701 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 23:24:30,702 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-27 23:24:30,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:24:30,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716097579] [2023-01-27 23:24:30,702 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-01-27 23:24:30,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997126422] [2023-01-27 23:24:30,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997126422] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 23:24:30,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 23:24:30,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 23:24:30,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812256838] [2023-01-27 23:24:30,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 23:24:30,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-27 23:24:30,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:24:30,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-27 23:24:30,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-27 23:24:30,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 251 [2023-01-27 23:24:30,707 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 34 transitions, 97 flow. Second operand has 4 states, 4 states have (on average 116.75) internal successors, (467), 4 states have internal predecessors, (467), 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 23:24:30,707 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:24:30,707 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 251 [2023-01-27 23:24:30,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:24:30,805 INFO L130 PetriNetUnfolder]: 454/847 cut-off events. [2023-01-27 23:24:30,806 INFO L131 PetriNetUnfolder]: For 51/51 co-relation queries the response was YES. [2023-01-27 23:24:30,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1812 conditions, 847 events. 454/847 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 3324 event pairs, 115 based on Foata normal form. 8/818 useless extension candidates. Maximal degree in co-relation 1801. Up to 408 conditions per place. [2023-01-27 23:24:30,808 INFO L137 encePairwiseOnDemand]: 246/251 looper letters, 56 selfloop transitions, 4 changer transitions 3/68 dead transitions. [2023-01-27 23:24:30,808 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 68 transitions, 305 flow [2023-01-27 23:24:30,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-27 23:24:30,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-27 23:24:30,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 517 transitions. [2023-01-27 23:24:30,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5149402390438247 [2023-01-27 23:24:30,810 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 517 transitions. [2023-01-27 23:24:30,810 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 517 transitions. [2023-01-27 23:24:30,810 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:24:30,810 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 517 transitions. [2023-01-27 23:24:30,811 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 129.25) internal successors, (517), 4 states have internal predecessors, (517), 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 23:24:30,812 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 251.0) internal successors, (1255), 5 states have internal predecessors, (1255), 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 23:24:30,813 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 251.0) internal successors, (1255), 5 states have internal predecessors, (1255), 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 23:24:30,813 INFO L175 Difference]: Start difference. First operand has 37 places, 34 transitions, 97 flow. Second operand 4 states and 517 transitions. [2023-01-27 23:24:30,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 68 transitions, 305 flow [2023-01-27 23:24:30,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 68 transitions, 303 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-27 23:24:30,814 INFO L231 Difference]: Finished difference. Result has 40 places, 36 transitions, 120 flow [2023-01-27 23:24:30,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=120, PETRI_PLACES=40, PETRI_TRANSITIONS=36} [2023-01-27 23:24:30,815 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 5 predicate places. [2023-01-27 23:24:30,815 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 36 transitions, 120 flow [2023-01-27 23:24:30,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 116.75) internal successors, (467), 4 states have internal predecessors, (467), 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 23:24:30,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:24:30,815 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 23:24:30,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-01-27 23:24:31,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:24:31,022 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 23:24:31,022 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:24:31,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1719788797, now seen corresponding path program 1 times [2023-01-27 23:24:31,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:24:31,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144351513] [2023-01-27 23:24:31,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:24:31,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:24:31,033 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-01-27 23:24:31,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [54471228] [2023-01-27 23:24:31,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:24:31,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:24:31,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:24:31,034 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 23:24:31,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-01-27 23:24:31,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:24:31,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 32 conjunts are in the unsatisfiable core [2023-01-27 23:24:31,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:24:31,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 23:24:31,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 12 [2023-01-27 23:24:31,223 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-01-27 23:24:31,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2023-01-27 23:24:31,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-01-27 23:24:31,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 44 [2023-01-27 23:24:31,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 53 [2023-01-27 23:24:31,481 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 23:24:31,482 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-27 23:24:31,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:24:31,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144351513] [2023-01-27 23:24:31,482 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-01-27 23:24:31,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54471228] [2023-01-27 23:24:31,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54471228] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 23:24:31,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 23:24:31,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-01-27 23:24:31,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811714373] [2023-01-27 23:24:31,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 23:24:31,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-01-27 23:24:31,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:24:31,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-01-27 23:24:31,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-01-27 23:24:31,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 251 [2023-01-27 23:24:31,484 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 36 transitions, 120 flow. Second operand has 9 states, 9 states have (on average 89.77777777777777) internal successors, (808), 9 states have internal predecessors, (808), 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 23:24:31,484 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:24:31,484 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 251 [2023-01-27 23:24:31,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:24:31,925 INFO L130 PetriNetUnfolder]: 1041/1922 cut-off events. [2023-01-27 23:24:31,925 INFO L131 PetriNetUnfolder]: For 254/262 co-relation queries the response was YES. [2023-01-27 23:24:31,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4170 conditions, 1922 events. 1041/1922 cut-off events. For 254/262 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 9485 event pairs, 266 based on Foata normal form. 34/1876 useless extension candidates. Maximal degree in co-relation 4157. Up to 635 conditions per place. [2023-01-27 23:24:31,932 INFO L137 encePairwiseOnDemand]: 239/251 looper letters, 106 selfloop transitions, 24 changer transitions 3/138 dead transitions. [2023-01-27 23:24:31,932 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 138 transitions, 663 flow [2023-01-27 23:24:31,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-27 23:24:31,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-27 23:24:31,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1013 transitions. [2023-01-27 23:24:31,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40358565737051794 [2023-01-27 23:24:31,935 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1013 transitions. [2023-01-27 23:24:31,935 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1013 transitions. [2023-01-27 23:24:31,935 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:24:31,935 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1013 transitions. [2023-01-27 23:24:31,937 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 101.3) internal successors, (1013), 10 states have internal predecessors, (1013), 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 23:24:31,940 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 251.0) internal successors, (2761), 11 states have internal predecessors, (2761), 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 23:24:31,940 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 251.0) internal successors, (2761), 11 states have internal predecessors, (2761), 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 23:24:31,940 INFO L175 Difference]: Start difference. First operand has 40 places, 36 transitions, 120 flow. Second operand 10 states and 1013 transitions. [2023-01-27 23:24:31,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 138 transitions, 663 flow [2023-01-27 23:24:31,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 138 transitions, 650 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-01-27 23:24:31,945 INFO L231 Difference]: Finished difference. Result has 53 places, 61 transitions, 290 flow [2023-01-27 23:24:31,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=290, PETRI_PLACES=53, PETRI_TRANSITIONS=61} [2023-01-27 23:24:31,946 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 18 predicate places. [2023-01-27 23:24:31,947 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 61 transitions, 290 flow [2023-01-27 23:24:31,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 89.77777777777777) internal successors, (808), 9 states have internal predecessors, (808), 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 23:24:31,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:24:31,947 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 23:24:31,954 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-01-27 23:24:32,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:24:32,153 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 23:24:32,153 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:24:32,154 INFO L85 PathProgramCache]: Analyzing trace with hash -304123085, now seen corresponding path program 2 times [2023-01-27 23:24:32,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:24:32,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074854926] [2023-01-27 23:24:32,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:24:32,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:24:32,168 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-01-27 23:24:32,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2076806159] [2023-01-27 23:24:32,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 23:24:32,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:24:32,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:24:32,169 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 23:24:32,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-01-27 23:24:32,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-01-27 23:24:32,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:24:32,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 32 conjunts are in the unsatisfiable core [2023-01-27 23:24:32,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:24:32,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 23:24:32,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 12 [2023-01-27 23:24:32,390 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-01-27 23:24:32,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2023-01-27 23:24:32,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-01-27 23:24:32,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 44 [2023-01-27 23:24:32,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 53 [2023-01-27 23:24:32,638 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 23:24:32,638 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-27 23:24:32,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:24:32,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074854926] [2023-01-27 23:24:32,638 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-01-27 23:24:32,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076806159] [2023-01-27 23:24:32,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076806159] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 23:24:32,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 23:24:32,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-01-27 23:24:32,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90744920] [2023-01-27 23:24:32,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 23:24:32,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-01-27 23:24:32,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:24:32,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-01-27 23:24:32,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-01-27 23:24:32,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 251 [2023-01-27 23:24:32,640 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 61 transitions, 290 flow. Second operand has 9 states, 9 states have (on average 89.77777777777777) internal successors, (808), 9 states have internal predecessors, (808), 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 23:24:32,640 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:24:32,640 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 251 [2023-01-27 23:24:32,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:24:33,163 INFO L130 PetriNetUnfolder]: 1710/3167 cut-off events. [2023-01-27 23:24:33,163 INFO L131 PetriNetUnfolder]: For 3910/3941 co-relation queries the response was YES. [2023-01-27 23:24:33,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9412 conditions, 3167 events. 1710/3167 cut-off events. For 3910/3941 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 17481 event pairs, 356 based on Foata normal form. 41/3182 useless extension candidates. Maximal degree in co-relation 9393. Up to 769 conditions per place. [2023-01-27 23:24:33,176 INFO L137 encePairwiseOnDemand]: 240/251 looper letters, 132 selfloop transitions, 44 changer transitions 3/184 dead transitions. [2023-01-27 23:24:33,176 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 184 transitions, 1174 flow [2023-01-27 23:24:33,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-01-27 23:24:33,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-01-27 23:24:33,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1214 transitions. [2023-01-27 23:24:33,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4030544488711819 [2023-01-27 23:24:33,179 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1214 transitions. [2023-01-27 23:24:33,179 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1214 transitions. [2023-01-27 23:24:33,179 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:24:33,180 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1214 transitions. [2023-01-27 23:24:33,181 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 101.16666666666667) internal successors, (1214), 12 states have internal predecessors, (1214), 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 23:24:33,184 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 251.0) internal successors, (3263), 13 states have internal predecessors, (3263), 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 23:24:33,184 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 251.0) internal successors, (3263), 13 states have internal predecessors, (3263), 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 23:24:33,184 INFO L175 Difference]: Start difference. First operand has 53 places, 61 transitions, 290 flow. Second operand 12 states and 1214 transitions. [2023-01-27 23:24:33,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 184 transitions, 1174 flow [2023-01-27 23:24:33,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 184 transitions, 1172 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-01-27 23:24:33,190 INFO L231 Difference]: Finished difference. Result has 72 places, 83 transitions, 616 flow [2023-01-27 23:24:33,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=616, PETRI_PLACES=72, PETRI_TRANSITIONS=83} [2023-01-27 23:24:33,191 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 37 predicate places. [2023-01-27 23:24:33,191 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 83 transitions, 616 flow [2023-01-27 23:24:33,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 89.77777777777777) internal successors, (808), 9 states have internal predecessors, (808), 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 23:24:33,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:24:33,191 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:24:33,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-01-27 23:24:33,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:24:33,397 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 23:24:33,397 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:24:33,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1084291500, now seen corresponding path program 1 times [2023-01-27 23:24:33,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:24:33,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180792314] [2023-01-27 23:24:33,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:24:33,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:24:33,408 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-01-27 23:24:33,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [602850332] [2023-01-27 23:24:33,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:24:33,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:24:33,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:24:33,423 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 23:24:33,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-01-27 23:24:33,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 23:24:33,548 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 23:24:33,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 23:24:33,604 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 23:24:33,605 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 23:24:33,605 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 6 remaining) [2023-01-27 23:24:33,606 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 6 remaining) [2023-01-27 23:24:33,606 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2023-01-27 23:24:33,606 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-01-27 23:24:33,607 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-01-27 23:24:33,607 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-01-27 23:24:33,614 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-01-27 23:24:33,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:24:33,807 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1] [2023-01-27 23:24:33,811 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-01-27 23:24:33,811 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-01-27 23:24:33,855 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.01 11:24:33 BasicIcfg [2023-01-27 23:24:33,855 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-01-27 23:24:33,855 INFO L158 Benchmark]: Toolchain (without parser) took 9655.31ms. Allocated memory was 348.1MB in the beginning and 608.2MB in the end (delta: 260.0MB). Free memory was 286.1MB in the beginning and 549.4MB in the end (delta: -263.3MB). There was no memory consumed. Max. memory is 16.0GB. [2023-01-27 23:24:33,855 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 348.1MB. Free memory is still 296.4MB. There was no memory consumed. Max. memory is 16.0GB. [2023-01-27 23:24:33,856 INFO L158 Benchmark]: CACSL2BoogieTranslator took 272.89ms. Allocated memory is still 348.1MB. Free memory was 286.0MB in the beginning and 265.7MB in the end (delta: 20.2MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. [2023-01-27 23:24:33,856 INFO L158 Benchmark]: Boogie Procedure Inliner took 47.76ms. Allocated memory is still 348.1MB. Free memory was 265.7MB in the beginning and 263.3MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-27 23:24:33,856 INFO L158 Benchmark]: Boogie Preprocessor took 46.48ms. Allocated memory was 348.1MB in the beginning and 497.0MB in the end (delta: 148.9MB). Free memory was 263.3MB in the beginning and 462.4MB in the end (delta: -199.1MB). Peak memory consumption was 9.2MB. Max. memory is 16.0GB. [2023-01-27 23:24:33,856 INFO L158 Benchmark]: RCFGBuilder took 428.05ms. Allocated memory is still 497.0MB. Free memory was 462.4MB in the beginning and 444.6MB in the end (delta: 17.8MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-01-27 23:24:33,856 INFO L158 Benchmark]: TraceAbstraction took 8855.39ms. Allocated memory was 497.0MB in the beginning and 608.2MB in the end (delta: 111.1MB). Free memory was 443.5MB in the beginning and 549.4MB in the end (delta: -105.9MB). Peak memory consumption was 5.2MB. Max. memory is 16.0GB. [2023-01-27 23:24:33,857 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 348.1MB. Free memory is still 296.4MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 272.89ms. Allocated memory is still 348.1MB. Free memory was 286.0MB in the beginning and 265.7MB in the end (delta: 20.2MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 47.76ms. Allocated memory is still 348.1MB. Free memory was 265.7MB in the beginning and 263.3MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 46.48ms. Allocated memory was 348.1MB in the beginning and 497.0MB in the end (delta: 148.9MB). Free memory was 263.3MB in the beginning and 462.4MB in the end (delta: -199.1MB). Peak memory consumption was 9.2MB. Max. memory is 16.0GB. * RCFGBuilder took 428.05ms. Allocated memory is still 497.0MB. Free memory was 462.4MB in the beginning and 444.6MB in the end (delta: 17.8MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * TraceAbstraction took 8855.39ms. Allocated memory was 497.0MB in the beginning and 608.2MB in the end (delta: 111.1MB). Free memory was 443.5MB in the beginning and 549.4MB in the end (delta: -105.9MB). Peak memory consumption was 5.2MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.6s, 126 PlacesBefore, 35 PlacesAfterwards, 129 TransitionsBefore, 34 TransitionsAfterwards, 3840 CoEnabledTransitionPairs, 7 FixpointIterations, 41 TrivialSequentialCompositions, 53 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 13 ConcurrentYvCompositions, 4 ChoiceCompositions, 111 TotalNumberOfCompositions, 8363 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 4886, independent: 4600, independent conditional: 0, independent unconditional: 4600, dependent: 286, dependent conditional: 0, dependent unconditional: 286, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 2137, independent: 2098, independent conditional: 0, independent unconditional: 2098, dependent: 39, dependent conditional: 0, dependent unconditional: 39, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 4886, independent: 2502, independent conditional: 0, independent unconditional: 2502, dependent: 247, dependent conditional: 0, dependent unconditional: 247, unknown: 2137, unknown conditional: 0, unknown unconditional: 2137] , Statistics on independence cache: Total cache size (in pairs): 171, Positive cache size: 154, Positive conditional cache size: 0, Positive unconditional cache size: 154, 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: 746]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L682] 0 static char buffer[10]; [L683] 0 static unsigned int first; [L684] 0 static unsigned int next; [L685] 0 static int buffer_size; [L686] 0 _Bool send, receive; [L687] 0 pthread_mutex_t m; [L756] 0 pthread_t id1, id2; [L758] CALL 0 initLog(10) [L690] 0 buffer_size = max [L691] EXPR 0 next = 0 [L691] 0 first = next = 0 [L758] RET 0 initLog(10) [L759] 0 send=1 [L760] 0 receive=0 [L761] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [buffer={3:0}, buffer_size=10, first=0, id1={5:0}, id2={6:0}, m={4:0}, next=0, pthread_create(&id1, ((void *)0), t1, ((void *)0))=-2, receive=0, send=1] [L762] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [buffer={3:0}, buffer_size=10, first=0, id1={5:0}, id2={6:0}, m={4:0}, next=0, pthread_create(&id2, ((void *)0), t2, ((void *)0))=-1, receive=0, send=1] [L739] 2 int i; [L740] 2 i=0 VAL [arg={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=0, i=0, m={4:0}, next=0, receive=0, send=1] [L740] COND TRUE 2 i<7 [L743] COND FALSE 2 !(\read(receive)) VAL [arg={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=0, i=0, m={4:0}, next=0, receive=0, send=1] [L740] 2 i++ VAL [arg={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=0, i=1, m={4:0}, next=0, receive=0, send=1] [L723] 1 int i; [L724] 1 i=0 VAL [arg={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=0, i=0, m={4:0}, next=0, receive=0, send=1] [L724] COND TRUE 1 i<7 [L727] COND TRUE 1 \read(send) [L729] CALL 1 insertLogElement(i) [L707] COND TRUE 1 next < buffer_size && buffer_size > 0 [L709] 1 buffer[next] = b VAL [\old(b)=0, b=0, buffer={3:0}, buffer_size=10, first=0, m={4:0}, next=0, receive=0, send=1] [L710] 1 next = (next+1)%buffer_size [L712] COND TRUE 1 next 0 && first < buffer_size [L697] 2 first++ [L698] EXPR 2 buffer[first-1] [L698] 2 return buffer[first-1]; [L745] RET, EXPR 2 removeLogElement() [L745] COND FALSE 2 !(removeLogElement()==i) [L746] 2 reach_error() VAL [arg={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=1, i=1, m={4:0}, next=1, receive=1, send=0] - UnprovableResult [Line: 761]: 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: 762]: 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: 713]: 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, 199 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: 8.7s, OverallIterations: 8, TraceHistogramMax: 2, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 1.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.7s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 425 SdHoareTripleChecker+Valid, 0.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 425 mSDsluCounter, 1 SdHoareTripleChecker+Invalid, 0.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 25 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 959 IncrementalHoareTripleChecker+Invalid, 984 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 25 mSolverCounterUnsat, 1 mSDtfsCounter, 959 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 80 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=616occurred in iteration=7, InterpolantAutomatonStates: 38, 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: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 120 NumberOfCodeBlocks, 120 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 91 ConstructedInterpolants, 18 QuantifiedInterpolants, 1018 SizeOfPredicates, 24 NumberOfNonLiveVariables, 840 ConjunctsInSsa, 82 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 PerfectInterpolantSequences, 0/0 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 23:24:33,873 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...