./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/pthread/singleton_with-uninit-problems.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/pthread/singleton_with-uninit-problems.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9556b3eb7217f056a72a299bf0514e64606a248fa454b59dcc03e4a2e74c7c90 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-31 22:16:18,730 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 22:16:18,731 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 22:16:18,754 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 22:16:18,754 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 22:16:18,755 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 22:16:18,756 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 22:16:18,757 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 22:16:18,759 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 22:16:18,760 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 22:16:18,760 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 22:16:18,761 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 22:16:18,762 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 22:16:18,763 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 22:16:18,763 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 22:16:18,764 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 22:16:18,765 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 22:16:18,766 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 22:16:18,767 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 22:16:18,768 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 22:16:18,777 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 22:16:18,778 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 22:16:18,779 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 22:16:18,780 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 22:16:18,783 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 22:16:18,783 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 22:16:18,784 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 22:16:18,784 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 22:16:18,785 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 22:16:18,786 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 22:16:18,786 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 22:16:18,787 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 22:16:18,787 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 22:16:18,788 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 22:16:18,789 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 22:16:18,789 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 22:16:18,790 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 22:16:18,790 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 22:16:18,790 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 22:16:18,791 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 22:16:18,792 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 22:16:18,794 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-31 22:16:18,823 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 22:16:18,824 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 22:16:18,825 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 22:16:18,825 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 22:16:18,826 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 22:16:18,826 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 22:16:18,826 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 22:16:18,827 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 22:16:18,827 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 22:16:18,827 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 22:16:18,828 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 22:16:18,828 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-31 22:16:18,828 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 22:16:18,828 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 22:16:18,828 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 22:16:18,829 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-31 22:16:18,829 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-31 22:16:18,829 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-31 22:16:18,829 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 22:16:18,829 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-31 22:16:18,830 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 22:16:18,830 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 22:16:18,830 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 22:16:18,830 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 22:16:18,830 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 22:16:18,831 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 22:16:18,831 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 22:16:18,831 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 22:16:18,831 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 22:16:18,831 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 22:16:18,831 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 22:16:18,832 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 22:16:18,832 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 22:16:18,832 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 22:16:18,832 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9556b3eb7217f056a72a299bf0514e64606a248fa454b59dcc03e4a2e74c7c90 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-08-31 22:16:19,129 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 22:16:19,147 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 22:16:19,149 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 22:16:19,150 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 22:16:19,151 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 22:16:19,152 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/singleton_with-uninit-problems.i [2023-08-31 22:16:20,339 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 22:16:20,602 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 22:16:20,602 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/singleton_with-uninit-problems.i [2023-08-31 22:16:20,620 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a0d531498/9eb25f50de5f40c09b8713508d1690ec/FLAG43851ef89 [2023-08-31 22:16:20,634 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a0d531498/9eb25f50de5f40c09b8713508d1690ec [2023-08-31 22:16:20,636 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 22:16:20,637 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 22:16:20,638 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 22:16:20,638 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 22:16:20,642 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 22:16:20,642 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 10:16:20" (1/1) ... [2023-08-31 22:16:20,643 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@459ce6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:16:20, skipping insertion in model container [2023-08-31 22:16:20,643 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 10:16:20" (1/1) ... [2023-08-31 22:16:20,649 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 22:16:20,693 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 22:16:20,866 WARN L633 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-31 22:16:21,085 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/singleton_with-uninit-problems.i[55568,55581] [2023-08-31 22:16:21,115 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 22:16:21,126 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 22:16:21,155 WARN L633 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-31 22:16:21,168 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/singleton_with-uninit-problems.i[55568,55581] [2023-08-31 22:16:21,188 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 22:16:21,266 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-31 22:16:21,266 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-31 22:16:21,266 WARN L667 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-08-31 22:16:21,272 INFO L208 MainTranslator]: Completed translation [2023-08-31 22:16:21,272 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:16:21 WrapperNode [2023-08-31 22:16:21,273 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 22:16:21,274 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 22:16:21,274 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 22:16:21,274 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 22:16:21,280 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:16:21" (1/1) ... [2023-08-31 22:16:21,310 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:16:21" (1/1) ... [2023-08-31 22:16:21,336 INFO L138 Inliner]: procedures = 325, calls = 53, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 41 [2023-08-31 22:16:21,336 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 22:16:21,337 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 22:16:21,337 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 22:16:21,337 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 22:16:21,345 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:16:21" (1/1) ... [2023-08-31 22:16:21,345 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:16:21" (1/1) ... [2023-08-31 22:16:21,359 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:16:21" (1/1) ... [2023-08-31 22:16:21,364 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:16:21" (1/1) ... [2023-08-31 22:16:21,370 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:16:21" (1/1) ... [2023-08-31 22:16:21,373 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:16:21" (1/1) ... [2023-08-31 22:16:21,374 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:16:21" (1/1) ... [2023-08-31 22:16:21,375 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:16:21" (1/1) ... [2023-08-31 22:16:21,378 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 22:16:21,378 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 22:16:21,379 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 22:16:21,379 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 22:16:21,379 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:16:21" (1/1) ... [2023-08-31 22:16:21,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 22:16:21,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 22:16:21,410 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) [2023-08-31 22:16:21,418 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 [2023-08-31 22:16:21,436 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-31 22:16:21,436 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 22:16:21,436 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 22:16:21,436 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-31 22:16:21,436 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 22:16:21,436 INFO L130 BoogieDeclarations]: Found specification of procedure thread0 [2023-08-31 22:16:21,437 INFO L138 BoogieDeclarations]: Found implementation of procedure thread0 [2023-08-31 22:16:21,437 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-31 22:16:21,437 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-31 22:16:21,437 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-31 22:16:21,437 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-31 22:16:21,437 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-31 22:16:21,437 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-31 22:16:21,438 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 22:16:21,438 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-31 22:16:21,438 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 22:16:21,438 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 22:16:21,438 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 22:16:21,438 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 22:16:21,439 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-31 22:16:21,559 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 22:16:21,561 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 22:16:21,925 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 22:16:21,931 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 22:16:21,931 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-08-31 22:16:21,933 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 10:16:21 BoogieIcfgContainer [2023-08-31 22:16:21,933 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 22:16:21,935 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 22:16:21,935 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 22:16:21,941 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 22:16:21,941 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 10:16:20" (1/3) ... [2023-08-31 22:16:21,942 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c0c632a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 10:16:21, skipping insertion in model container [2023-08-31 22:16:21,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:16:21" (2/3) ... [2023-08-31 22:16:21,942 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c0c632a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 10:16:21, skipping insertion in model container [2023-08-31 22:16:21,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 10:16:21" (3/3) ... [2023-08-31 22:16:21,944 INFO L112 eAbstractionObserver]: Analyzing ICFG singleton_with-uninit-problems.i [2023-08-31 22:16:21,959 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 22:16:21,959 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 34 error locations. [2023-08-31 22:16:21,959 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 22:16:22,161 INFO L144 ThreadInstanceAdder]: Constructed 21 joinOtherThreadTransitions. [2023-08-31 22:16:22,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 260 places, 251 transitions, 609 flow [2023-08-31 22:16:22,288 INFO L130 PetriNetUnfolder]: 7/172 cut-off events. [2023-08-31 22:16:22,288 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-31 22:16:22,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 202 conditions, 172 events. 7/172 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 188 event pairs, 0 based on Foata normal form. 0/127 useless extension candidates. Maximal degree in co-relation 146. Up to 3 conditions per place. [2023-08-31 22:16:22,297 INFO L82 GeneralOperation]: Start removeDead. Operand has 260 places, 251 transitions, 609 flow [2023-08-31 22:16:22,308 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 180 places, 168 transitions, 387 flow [2023-08-31 22:16:22,312 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:16:22,331 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 180 places, 168 transitions, 387 flow [2023-08-31 22:16:22,337 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 180 places, 168 transitions, 387 flow [2023-08-31 22:16:22,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 180 places, 168 transitions, 387 flow [2023-08-31 22:16:22,398 INFO L130 PetriNetUnfolder]: 7/168 cut-off events. [2023-08-31 22:16:22,399 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-31 22:16:22,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 198 conditions, 168 events. 7/168 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 186 event pairs, 0 based on Foata normal form. 0/124 useless extension candidates. Maximal degree in co-relation 143. Up to 3 conditions per place. [2023-08-31 22:16:22,403 INFO L119 LiptonReduction]: Number of co-enabled transitions 2920 [2023-08-31 22:16:26,323 INFO L134 LiptonReduction]: Checked pairs total: 6675 [2023-08-31 22:16:26,323 INFO L136 LiptonReduction]: Total number of compositions: 138 [2023-08-31 22:16:26,335 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 22:16:26,340 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=All, 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;@30b2ef7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:16:26,340 INFO L358 AbstractCegarLoop]: Starting to check reachability of 73 error locations. [2023-08-31 22:16:26,342 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-31 22:16:26,342 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 22:16:26,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:16:26,342 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-31 22:16:26,343 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-08-31 22:16:26,346 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:16:26,346 INFO L85 PathProgramCache]: Analyzing trace with hash 642, now seen corresponding path program 1 times [2023-08-31 22:16:26,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:16:26,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476611747] [2023-08-31 22:16:26,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:16:26,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:16:26,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:16:26,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:16:26,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:16:26,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476611747] [2023-08-31 22:16:26,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476611747] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:16:26,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:16:26,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-31 22:16:26,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199904012] [2023-08-31 22:16:26,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:16:26,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-31 22:16:26,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:16:26,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-31 22:16:26,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-31 22:16:26,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 391 [2023-08-31 22:16:26,533 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 87 transitions, 225 flow. Second operand has 2 states, 2 states have (on average 220.5) internal successors, (441), 2 states have internal predecessors, (441), 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) [2023-08-31 22:16:26,533 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:16:26,534 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 391 [2023-08-31 22:16:26,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:16:28,966 INFO L130 PetriNetUnfolder]: 19439/26681 cut-off events. [2023-08-31 22:16:28,966 INFO L131 PetriNetUnfolder]: For 529/529 co-relation queries the response was YES. [2023-08-31 22:16:29,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53377 conditions, 26681 events. 19439/26681 cut-off events. For 529/529 co-relation queries the response was YES. Maximal size of possible extension queue 1699. Compared 145279 event pairs, 19095 based on Foata normal form. 0/9506 useless extension candidates. Maximal degree in co-relation 53352. Up to 25310 conditions per place. [2023-08-31 22:16:29,156 INFO L137 encePairwiseOnDemand]: 387/391 looper letters, 64 selfloop transitions, 0 changer transitions 0/83 dead transitions. [2023-08-31 22:16:29,157 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 83 transitions, 345 flow [2023-08-31 22:16:29,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-31 22:16:29,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-31 22:16:29,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 508 transitions. [2023-08-31 22:16:29,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.649616368286445 [2023-08-31 22:16:29,177 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 508 transitions. [2023-08-31 22:16:29,177 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 508 transitions. [2023-08-31 22:16:29,180 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:16:29,182 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 508 transitions. [2023-08-31 22:16:29,187 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 254.0) internal successors, (508), 2 states have internal predecessors, (508), 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) [2023-08-31 22:16:29,192 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 391.0) internal successors, (1173), 3 states have internal predecessors, (1173), 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) [2023-08-31 22:16:29,193 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 391.0) internal successors, (1173), 3 states have internal predecessors, (1173), 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) [2023-08-31 22:16:29,194 INFO L175 Difference]: Start difference. First operand has 101 places, 87 transitions, 225 flow. Second operand 2 states and 508 transitions. [2023-08-31 22:16:29,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 83 transitions, 345 flow [2023-08-31 22:16:29,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 83 transitions, 311 flow, removed 0 selfloop flow, removed 12 redundant places. [2023-08-31 22:16:29,267 INFO L231 Difference]: Finished difference. Result has 86 places, 83 transitions, 183 flow [2023-08-31 22:16:29,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=391, PETRI_DIFFERENCE_MINUEND_FLOW=183, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=183, PETRI_PLACES=86, PETRI_TRANSITIONS=83} [2023-08-31 22:16:29,274 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -15 predicate places. [2023-08-31 22:16:29,275 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 83 transitions, 183 flow [2023-08-31 22:16:29,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 220.5) internal successors, (441), 2 states have internal predecessors, (441), 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) [2023-08-31 22:16:29,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:16:29,276 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-31 22:16:29,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 22:16:29,276 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-08-31 22:16:29,284 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:16:29,285 INFO L85 PathProgramCache]: Analyzing trace with hash 632141, now seen corresponding path program 1 times [2023-08-31 22:16:29,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:16:29,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199565692] [2023-08-31 22:16:29,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:16:29,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:16:29,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:16:29,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:16:29,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:16:29,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199565692] [2023-08-31 22:16:29,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199565692] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:16:29,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:16:29,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-31 22:16:29,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371550066] [2023-08-31 22:16:29,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:16:29,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:16:29,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:16:29,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:16:29,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:16:29,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 391 [2023-08-31 22:16:29,593 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 83 transitions, 183 flow. Second operand has 3 states, 3 states have (on average 203.0) internal successors, (609), 3 states have internal predecessors, (609), 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) [2023-08-31 22:16:29,594 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:16:29,594 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 391 [2023-08-31 22:16:29,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:16:30,917 INFO L130 PetriNetUnfolder]: 14219/19666 cut-off events. [2023-08-31 22:16:30,918 INFO L131 PetriNetUnfolder]: For 63/63 co-relation queries the response was YES. [2023-08-31 22:16:30,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38568 conditions, 19666 events. 14219/19666 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 1284. Compared 104268 event pairs, 13951 based on Foata normal form. 0/7508 useless extension candidates. Maximal degree in co-relation 38565. Up to 18601 conditions per place. [2023-08-31 22:16:31,019 INFO L137 encePairwiseOnDemand]: 382/391 looper letters, 68 selfloop transitions, 8 changer transitions 0/94 dead transitions. [2023-08-31 22:16:31,019 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 94 transitions, 358 flow [2023-08-31 22:16:31,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:16:31,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:16:31,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 683 transitions. [2023-08-31 22:16:31,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5822676896845694 [2023-08-31 22:16:31,022 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 683 transitions. [2023-08-31 22:16:31,022 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 683 transitions. [2023-08-31 22:16:31,023 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:16:31,023 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 683 transitions. [2023-08-31 22:16:31,025 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 227.66666666666666) internal successors, (683), 3 states have internal predecessors, (683), 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) [2023-08-31 22:16:31,027 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 391.0) internal successors, (1564), 4 states have internal predecessors, (1564), 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) [2023-08-31 22:16:31,028 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 391.0) internal successors, (1564), 4 states have internal predecessors, (1564), 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) [2023-08-31 22:16:31,028 INFO L175 Difference]: Start difference. First operand has 86 places, 83 transitions, 183 flow. Second operand 3 states and 683 transitions. [2023-08-31 22:16:31,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 94 transitions, 358 flow [2023-08-31 22:16:31,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 94 transitions, 358 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 22:16:31,031 INFO L231 Difference]: Finished difference. Result has 90 places, 89 transitions, 241 flow [2023-08-31 22:16:31,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=391, PETRI_DIFFERENCE_MINUEND_FLOW=183, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=241, PETRI_PLACES=90, PETRI_TRANSITIONS=89} [2023-08-31 22:16:31,032 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -11 predicate places. [2023-08-31 22:16:31,032 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 89 transitions, 241 flow [2023-08-31 22:16:31,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 203.0) internal successors, (609), 3 states have internal predecessors, (609), 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) [2023-08-31 22:16:31,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:16:31,033 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-31 22:16:31,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-31 22:16:31,034 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-08-31 22:16:31,034 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:16:31,034 INFO L85 PathProgramCache]: Analyzing trace with hash 632142, now seen corresponding path program 1 times [2023-08-31 22:16:31,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:16:31,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920902701] [2023-08-31 22:16:31,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:16:31,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:16:31,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:16:31,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:16:31,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:16:31,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920902701] [2023-08-31 22:16:31,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920902701] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:16:31,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:16:31,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-31 22:16:31,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612435862] [2023-08-31 22:16:31,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:16:31,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:16:31,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:16:31,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:16:31,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:16:31,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 391 [2023-08-31 22:16:31,220 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 89 transitions, 241 flow. Second operand has 3 states, 3 states have (on average 208.0) internal successors, (624), 3 states have internal predecessors, (624), 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) [2023-08-31 22:16:31,220 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:16:31,220 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 391 [2023-08-31 22:16:31,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:16:33,072 INFO L130 PetriNetUnfolder]: 17984/25240 cut-off events. [2023-08-31 22:16:33,072 INFO L131 PetriNetUnfolder]: For 1569/1569 co-relation queries the response was YES. [2023-08-31 22:16:33,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50992 conditions, 25240 events. 17984/25240 cut-off events. For 1569/1569 co-relation queries the response was YES. Maximal size of possible extension queue 1699. Compared 143915 event pairs, 16168 based on Foata normal form. 1/10995 useless extension candidates. Maximal degree in co-relation 50987. Up to 17180 conditions per place. [2023-08-31 22:16:33,208 INFO L137 encePairwiseOnDemand]: 379/391 looper letters, 121 selfloop transitions, 13 changer transitions 0/151 dead transitions. [2023-08-31 22:16:33,208 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 151 transitions, 663 flow [2023-08-31 22:16:33,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:16:33,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:16:33,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 751 transitions. [2023-08-31 22:16:33,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6402387041773231 [2023-08-31 22:16:33,211 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 751 transitions. [2023-08-31 22:16:33,211 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 751 transitions. [2023-08-31 22:16:33,211 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:16:33,212 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 751 transitions. [2023-08-31 22:16:33,213 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 250.33333333333334) internal successors, (751), 3 states have internal predecessors, (751), 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) [2023-08-31 22:16:33,215 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 391.0) internal successors, (1564), 4 states have internal predecessors, (1564), 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) [2023-08-31 22:16:33,216 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 391.0) internal successors, (1564), 4 states have internal predecessors, (1564), 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) [2023-08-31 22:16:33,216 INFO L175 Difference]: Start difference. First operand has 90 places, 89 transitions, 241 flow. Second operand 3 states and 751 transitions. [2023-08-31 22:16:33,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 151 transitions, 663 flow [2023-08-31 22:16:33,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 151 transitions, 645 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 22:16:33,222 INFO L231 Difference]: Finished difference. Result has 92 places, 98 transitions, 319 flow [2023-08-31 22:16:33,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=391, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=319, PETRI_PLACES=92, PETRI_TRANSITIONS=98} [2023-08-31 22:16:33,224 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -9 predicate places. [2023-08-31 22:16:33,226 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 98 transitions, 319 flow [2023-08-31 22:16:33,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 208.0) internal successors, (624), 3 states have internal predecessors, (624), 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) [2023-08-31 22:16:33,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:16:33,227 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-31 22:16:33,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-31 22:16:33,228 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-08-31 22:16:33,228 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:16:33,229 INFO L85 PathProgramCache]: Analyzing trace with hash 19594966, now seen corresponding path program 1 times [2023-08-31 22:16:33,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:16:33,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915260177] [2023-08-31 22:16:33,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:16:33,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:16:33,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:16:33,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:16:33,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:16:33,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915260177] [2023-08-31 22:16:33,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915260177] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:16:33,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:16:33,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 22:16:33,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849812065] [2023-08-31 22:16:33,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:16:33,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 22:16:33,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:16:33,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 22:16:33,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-31 22:16:33,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 391 [2023-08-31 22:16:33,629 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 98 transitions, 319 flow. Second operand has 4 states, 4 states have (on average 200.0) internal successors, (800), 4 states have internal predecessors, (800), 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) [2023-08-31 22:16:33,629 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:16:33,629 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 391 [2023-08-31 22:16:33,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:16:34,499 INFO L130 PetriNetUnfolder]: 12756/18205 cut-off events. [2023-08-31 22:16:34,499 INFO L131 PetriNetUnfolder]: For 10326/10326 co-relation queries the response was YES. [2023-08-31 22:16:34,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40142 conditions, 18205 events. 12756/18205 cut-off events. For 10326/10326 co-relation queries the response was YES. Maximal size of possible extension queue 1284. Compared 102811 event pairs, 12482 based on Foata normal form. 1469/8987 useless extension candidates. Maximal degree in co-relation 40136. Up to 17141 conditions per place. [2023-08-31 22:16:34,698 INFO L137 encePairwiseOnDemand]: 382/391 looper letters, 70 selfloop transitions, 10 changer transitions 0/101 dead transitions. [2023-08-31 22:16:34,699 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 101 transitions, 484 flow [2023-08-31 22:16:34,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 22:16:34,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 22:16:34,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 872 transitions. [2023-08-31 22:16:34,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5575447570332481 [2023-08-31 22:16:34,707 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 872 transitions. [2023-08-31 22:16:34,707 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 872 transitions. [2023-08-31 22:16:34,709 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:16:34,709 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 872 transitions. [2023-08-31 22:16:34,713 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 218.0) internal successors, (872), 4 states have internal predecessors, (872), 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) [2023-08-31 22:16:34,716 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 391.0) internal successors, (1955), 5 states have internal predecessors, (1955), 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) [2023-08-31 22:16:34,717 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 391.0) internal successors, (1955), 5 states have internal predecessors, (1955), 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) [2023-08-31 22:16:34,717 INFO L175 Difference]: Start difference. First operand has 92 places, 98 transitions, 319 flow. Second operand 4 states and 872 transitions. [2023-08-31 22:16:34,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 101 transitions, 484 flow [2023-08-31 22:16:34,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 101 transitions, 458 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 22:16:34,727 INFO L231 Difference]: Finished difference. Result has 92 places, 97 transitions, 309 flow [2023-08-31 22:16:34,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=391, PETRI_DIFFERENCE_MINUEND_FLOW=289, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=309, PETRI_PLACES=92, PETRI_TRANSITIONS=97} [2023-08-31 22:16:34,729 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -9 predicate places. [2023-08-31 22:16:34,729 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 97 transitions, 309 flow [2023-08-31 22:16:34,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 200.0) internal successors, (800), 4 states have internal predecessors, (800), 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) [2023-08-31 22:16:34,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:16:34,730 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:16:34,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-31 22:16:34,731 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-08-31 22:16:34,731 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:16:34,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1439893220, now seen corresponding path program 1 times [2023-08-31 22:16:34,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:16:34,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156188645] [2023-08-31 22:16:34,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:16:34,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:16:34,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:16:34,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:16:34,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:16:34,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156188645] [2023-08-31 22:16:34,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156188645] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:16:34,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:16:34,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 22:16:34,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393403653] [2023-08-31 22:16:34,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:16:34,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:16:34,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:16:34,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:16:34,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:16:35,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 391 [2023-08-31 22:16:35,055 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 97 transitions, 309 flow. Second operand has 3 states, 3 states have (on average 204.66666666666666) internal successors, (614), 3 states have internal predecessors, (614), 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) [2023-08-31 22:16:35,055 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:16:35,055 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 391 [2023-08-31 22:16:35,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:16:35,998 INFO L130 PetriNetUnfolder]: 12751/18192 cut-off events. [2023-08-31 22:16:35,999 INFO L131 PetriNetUnfolder]: For 4476/4476 co-relation queries the response was YES. [2023-08-31 22:16:36,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38640 conditions, 18192 events. 12751/18192 cut-off events. For 4476/4476 co-relation queries the response was YES. Maximal size of possible extension queue 1284. Compared 102771 event pairs, 12479 based on Foata normal form. 0/7515 useless extension candidates. Maximal degree in co-relation 38634. Up to 17118 conditions per place. [2023-08-31 22:16:36,108 INFO L137 encePairwiseOnDemand]: 387/391 looper letters, 72 selfloop transitions, 2 changer transitions 0/94 dead transitions. [2023-08-31 22:16:36,109 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 94 transitions, 447 flow [2023-08-31 22:16:36,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:16:36,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:16:36,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 675 transitions. [2023-08-31 22:16:36,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5754475703324808 [2023-08-31 22:16:36,111 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 675 transitions. [2023-08-31 22:16:36,111 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 675 transitions. [2023-08-31 22:16:36,112 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:16:36,112 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 675 transitions. [2023-08-31 22:16:36,113 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 225.0) internal successors, (675), 3 states have internal predecessors, (675), 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) [2023-08-31 22:16:36,116 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 391.0) internal successors, (1564), 4 states have internal predecessors, (1564), 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) [2023-08-31 22:16:36,116 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 391.0) internal successors, (1564), 4 states have internal predecessors, (1564), 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) [2023-08-31 22:16:36,116 INFO L175 Difference]: Start difference. First operand has 92 places, 97 transitions, 309 flow. Second operand 3 states and 675 transitions. [2023-08-31 22:16:36,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 94 transitions, 447 flow [2023-08-31 22:16:36,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 94 transitions, 435 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 22:16:36,125 INFO L231 Difference]: Finished difference. Result has 90 places, 94 transitions, 291 flow [2023-08-31 22:16:36,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=391, PETRI_DIFFERENCE_MINUEND_FLOW=287, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=291, PETRI_PLACES=90, PETRI_TRANSITIONS=94} [2023-08-31 22:16:36,127 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -11 predicate places. [2023-08-31 22:16:36,127 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 94 transitions, 291 flow [2023-08-31 22:16:36,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 204.66666666666666) internal successors, (614), 3 states have internal predecessors, (614), 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) [2023-08-31 22:16:36,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:16:36,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:16:36,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-31 22:16:36,129 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-08-31 22:16:36,129 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:16:36,130 INFO L85 PathProgramCache]: Analyzing trace with hash 1439893221, now seen corresponding path program 1 times [2023-08-31 22:16:36,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:16:36,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569358839] [2023-08-31 22:16:36,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:16:36,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:16:36,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:16:36,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:16:36,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:16:36,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569358839] [2023-08-31 22:16:36,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569358839] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:16:36,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:16:36,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 22:16:36,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928215161] [2023-08-31 22:16:36,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:16:36,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 22:16:36,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:16:36,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 22:16:36,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-31 22:16:36,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 391 [2023-08-31 22:16:36,496 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 94 transitions, 291 flow. Second operand has 4 states, 4 states have (on average 201.5) internal successors, (806), 4 states have internal predecessors, (806), 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) [2023-08-31 22:16:36,496 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:16:36,496 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 391 [2023-08-31 22:16:36,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:16:37,507 INFO L130 PetriNetUnfolder]: 12745/18177 cut-off events. [2023-08-31 22:16:37,507 INFO L131 PetriNetUnfolder]: For 4468/4468 co-relation queries the response was YES. [2023-08-31 22:16:37,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38594 conditions, 18177 events. 12745/18177 cut-off events. For 4468/4468 co-relation queries the response was YES. Maximal size of possible extension queue 1284. Compared 102288 event pairs, 12475 based on Foata normal form. 0/7509 useless extension candidates. Maximal degree in co-relation 38588. Up to 17103 conditions per place. [2023-08-31 22:16:37,566 INFO L137 encePairwiseOnDemand]: 387/391 looper letters, 69 selfloop transitions, 2 changer transitions 0/91 dead transitions. [2023-08-31 22:16:37,566 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 91 transitions, 423 flow [2023-08-31 22:16:37,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:16:37,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:16:37,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 664 transitions. [2023-08-31 22:16:37,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.566069906223359 [2023-08-31 22:16:37,569 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 664 transitions. [2023-08-31 22:16:37,569 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 664 transitions. [2023-08-31 22:16:37,569 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:16:37,569 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 664 transitions. [2023-08-31 22:16:37,571 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 221.33333333333334) internal successors, (664), 3 states have internal predecessors, (664), 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) [2023-08-31 22:16:37,573 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 391.0) internal successors, (1564), 4 states have internal predecessors, (1564), 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) [2023-08-31 22:16:37,574 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 391.0) internal successors, (1564), 4 states have internal predecessors, (1564), 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) [2023-08-31 22:16:37,574 INFO L175 Difference]: Start difference. First operand has 90 places, 94 transitions, 291 flow. Second operand 3 states and 664 transitions. [2023-08-31 22:16:37,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 91 transitions, 423 flow [2023-08-31 22:16:37,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 91 transitions, 419 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 22:16:37,578 INFO L231 Difference]: Finished difference. Result has 88 places, 91 transitions, 281 flow [2023-08-31 22:16:37,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=391, PETRI_DIFFERENCE_MINUEND_FLOW=277, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=281, PETRI_PLACES=88, PETRI_TRANSITIONS=91} [2023-08-31 22:16:37,579 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -13 predicate places. [2023-08-31 22:16:37,579 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 91 transitions, 281 flow [2023-08-31 22:16:37,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 201.5) internal successors, (806), 4 states have internal predecessors, (806), 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) [2023-08-31 22:16:37,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:16:37,580 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:16:37,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-31 22:16:37,580 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread0Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-08-31 22:16:37,581 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:16:37,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1496705849, now seen corresponding path program 1 times [2023-08-31 22:16:37,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:16:37,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528027718] [2023-08-31 22:16:37,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:16:37,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:16:37,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:16:37,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:16:37,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:16:37,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528027718] [2023-08-31 22:16:37,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528027718] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:16:37,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:16:37,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 22:16:37,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750951896] [2023-08-31 22:16:37,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:16:37,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 22:16:37,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:16:37,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 22:16:37,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-31 22:16:38,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 391 [2023-08-31 22:16:38,207 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 91 transitions, 281 flow. Second operand has 5 states, 5 states have (on average 202.2) internal successors, (1011), 5 states have internal predecessors, (1011), 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) [2023-08-31 22:16:38,208 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:16:38,208 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 391 [2023-08-31 22:16:38,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:16:38,700 INFO L130 PetriNetUnfolder]: 7622/11511 cut-off events. [2023-08-31 22:16:38,700 INFO L131 PetriNetUnfolder]: For 2921/2921 co-relation queries the response was YES. [2023-08-31 22:16:38,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24233 conditions, 11511 events. 7622/11511 cut-off events. For 2921/2921 co-relation queries the response was YES. Maximal size of possible extension queue 624. Compared 66036 event pairs, 7348 based on Foata normal form. 0/5456 useless extension candidates. Maximal degree in co-relation 24227. Up to 10435 conditions per place. [2023-08-31 22:16:38,738 INFO L137 encePairwiseOnDemand]: 384/391 looper letters, 66 selfloop transitions, 5 changer transitions 0/90 dead transitions. [2023-08-31 22:16:38,738 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 90 transitions, 432 flow [2023-08-31 22:16:38,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 22:16:38,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 22:16:38,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 864 transitions. [2023-08-31 22:16:38,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5524296675191815 [2023-08-31 22:16:38,741 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 864 transitions. [2023-08-31 22:16:38,741 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 864 transitions. [2023-08-31 22:16:38,741 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:16:38,741 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 864 transitions. [2023-08-31 22:16:38,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 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) [2023-08-31 22:16:38,745 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 391.0) internal successors, (1955), 5 states have internal predecessors, (1955), 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) [2023-08-31 22:16:38,746 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 391.0) internal successors, (1955), 5 states have internal predecessors, (1955), 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) [2023-08-31 22:16:38,746 INFO L175 Difference]: Start difference. First operand has 88 places, 91 transitions, 281 flow. Second operand 4 states and 864 transitions. [2023-08-31 22:16:38,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 90 transitions, 432 flow [2023-08-31 22:16:38,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 90 transitions, 428 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 22:16:38,750 INFO L231 Difference]: Finished difference. Result has 85 places, 87 transitions, 279 flow [2023-08-31 22:16:38,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=391, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=279, PETRI_PLACES=85, PETRI_TRANSITIONS=87} [2023-08-31 22:16:38,751 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -16 predicate places. [2023-08-31 22:16:38,751 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 87 transitions, 279 flow [2023-08-31 22:16:38,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 202.2) internal successors, (1011), 5 states have internal predecessors, (1011), 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) [2023-08-31 22:16:38,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:16:38,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:16:38,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-31 22:16:38,752 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread0Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-08-31 22:16:38,752 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:16:38,753 INFO L85 PathProgramCache]: Analyzing trace with hash 479736861, now seen corresponding path program 1 times [2023-08-31 22:16:38,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:16:38,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784909422] [2023-08-31 22:16:38,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:16:38,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:16:38,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:16:38,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:16:38,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:16:38,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784909422] [2023-08-31 22:16:38,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784909422] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:16:38,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:16:38,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 22:16:38,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050715011] [2023-08-31 22:16:38,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:16:38,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:16:38,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:16:38,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:16:38,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:16:38,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 391 [2023-08-31 22:16:38,995 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 87 transitions, 279 flow. Second operand has 3 states, 3 states have (on average 207.0) internal successors, (621), 3 states have internal predecessors, (621), 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) [2023-08-31 22:16:38,995 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:16:38,995 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 391 [2023-08-31 22:16:38,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:16:39,520 INFO L130 PetriNetUnfolder]: 8105/11790 cut-off events. [2023-08-31 22:16:39,521 INFO L131 PetriNetUnfolder]: For 3054/3054 co-relation queries the response was YES. [2023-08-31 22:16:39,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25301 conditions, 11790 events. 8105/11790 cut-off events. For 3054/3054 co-relation queries the response was YES. Maximal size of possible extension queue 624. Compared 62997 event pairs, 7835 based on Foata normal form. 0/5849 useless extension candidates. Maximal degree in co-relation 25295. Up to 11097 conditions per place. [2023-08-31 22:16:39,576 INFO L137 encePairwiseOnDemand]: 387/391 looper letters, 66 selfloop transitions, 3 changer transitions 0/86 dead transitions. [2023-08-31 22:16:39,576 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 86 transitions, 419 flow [2023-08-31 22:16:39,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:16:39,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:16:39,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 669 transitions. [2023-08-31 22:16:39,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5703324808184144 [2023-08-31 22:16:39,579 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 669 transitions. [2023-08-31 22:16:39,579 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 669 transitions. [2023-08-31 22:16:39,580 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:16:39,580 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 669 transitions. [2023-08-31 22:16:39,581 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 223.0) internal successors, (669), 3 states have internal predecessors, (669), 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) [2023-08-31 22:16:39,583 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 391.0) internal successors, (1564), 4 states have internal predecessors, (1564), 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) [2023-08-31 22:16:39,583 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 391.0) internal successors, (1564), 4 states have internal predecessors, (1564), 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) [2023-08-31 22:16:39,584 INFO L175 Difference]: Start difference. First operand has 85 places, 87 transitions, 279 flow. Second operand 3 states and 669 transitions. [2023-08-31 22:16:39,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 86 transitions, 419 flow [2023-08-31 22:16:39,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 86 transitions, 409 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-31 22:16:39,587 INFO L231 Difference]: Finished difference. Result has 82 places, 85 transitions, 271 flow [2023-08-31 22:16:39,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=391, PETRI_DIFFERENCE_MINUEND_FLOW=265, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=271, PETRI_PLACES=82, PETRI_TRANSITIONS=85} [2023-08-31 22:16:39,588 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -19 predicate places. [2023-08-31 22:16:39,588 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 85 transitions, 271 flow [2023-08-31 22:16:39,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 207.0) internal successors, (621), 3 states have internal predecessors, (621), 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) [2023-08-31 22:16:39,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:16:39,589 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:16:39,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-31 22:16:39,589 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread0Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-08-31 22:16:39,590 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:16:39,590 INFO L85 PathProgramCache]: Analyzing trace with hash 479736860, now seen corresponding path program 1 times [2023-08-31 22:16:39,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:16:39,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291098996] [2023-08-31 22:16:39,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:16:39,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:16:39,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:16:39,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:16:39,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:16:39,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291098996] [2023-08-31 22:16:39,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291098996] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:16:39,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:16:39,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 22:16:39,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386323608] [2023-08-31 22:16:39,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:16:39,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 22:16:39,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:16:39,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 22:16:39,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-31 22:16:40,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 391 [2023-08-31 22:16:40,164 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 85 transitions, 271 flow. Second operand has 5 states, 5 states have (on average 202.4) internal successors, (1012), 5 states have internal predecessors, (1012), 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) [2023-08-31 22:16:40,164 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:16:40,164 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 391 [2023-08-31 22:16:40,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:16:40,865 INFO L130 PetriNetUnfolder]: 8092/11573 cut-off events. [2023-08-31 22:16:40,866 INFO L131 PetriNetUnfolder]: For 3042/3042 co-relation queries the response was YES. [2023-08-31 22:16:40,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25046 conditions, 11573 events. 8092/11573 cut-off events. For 3042/3042 co-relation queries the response was YES. Maximal size of possible extension queue 624. Compared 59724 event pairs, 7819 based on Foata normal form. 0/5650 useless extension candidates. Maximal degree in co-relation 25040. Up to 11072 conditions per place. [2023-08-31 22:16:40,915 INFO L137 encePairwiseOnDemand]: 386/391 looper letters, 65 selfloop transitions, 5 changer transitions 0/86 dead transitions. [2023-08-31 22:16:40,915 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 86 transitions, 424 flow [2023-08-31 22:16:40,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 22:16:40,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 22:16:40,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 861 transitions. [2023-08-31 22:16:40,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5505115089514067 [2023-08-31 22:16:40,918 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 861 transitions. [2023-08-31 22:16:40,918 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 861 transitions. [2023-08-31 22:16:40,919 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:16:40,919 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 861 transitions. [2023-08-31 22:16:40,920 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 215.25) internal successors, (861), 4 states have internal predecessors, (861), 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) [2023-08-31 22:16:40,923 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 391.0) internal successors, (1955), 5 states have internal predecessors, (1955), 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) [2023-08-31 22:16:40,923 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 391.0) internal successors, (1955), 5 states have internal predecessors, (1955), 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) [2023-08-31 22:16:40,923 INFO L175 Difference]: Start difference. First operand has 82 places, 85 transitions, 271 flow. Second operand 4 states and 861 transitions. [2023-08-31 22:16:40,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 86 transitions, 424 flow [2023-08-31 22:16:40,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 86 transitions, 418 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 22:16:40,928 INFO L231 Difference]: Finished difference. Result has 81 places, 83 transitions, 271 flow [2023-08-31 22:16:40,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=391, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=271, PETRI_PLACES=81, PETRI_TRANSITIONS=83} [2023-08-31 22:16:40,929 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -20 predicate places. [2023-08-31 22:16:40,929 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 83 transitions, 271 flow [2023-08-31 22:16:40,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 202.4) internal successors, (1012), 5 states have internal predecessors, (1012), 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) [2023-08-31 22:16:40,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:16:40,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:16:40,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-31 22:16:40,930 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-08-31 22:16:40,931 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:16:40,931 INFO L85 PathProgramCache]: Analyzing trace with hash 479736785, now seen corresponding path program 1 times [2023-08-31 22:16:40,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:16:40,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565361394] [2023-08-31 22:16:40,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:16:40,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:16:40,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:16:40,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:16:40,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:16:40,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565361394] [2023-08-31 22:16:40,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565361394] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:16:40,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:16:40,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 22:16:40,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736220084] [2023-08-31 22:16:40,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:16:40,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:16:40,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:16:40,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:16:40,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:16:41,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 391 [2023-08-31 22:16:41,094 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 83 transitions, 271 flow. Second operand has 3 states, 3 states have (on average 210.66666666666666) internal successors, (632), 3 states have internal predecessors, (632), 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) [2023-08-31 22:16:41,094 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:16:41,094 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 391 [2023-08-31 22:16:41,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:16:41,364 INFO L130 PetriNetUnfolder]: 2562/4003 cut-off events. [2023-08-31 22:16:41,364 INFO L131 PetriNetUnfolder]: For 1155/1155 co-relation queries the response was YES. [2023-08-31 22:16:41,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8629 conditions, 4003 events. 2562/4003 cut-off events. For 1155/1155 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 19192 event pairs, 2424 based on Foata normal form. 0/2436 useless extension candidates. Maximal degree in co-relation 8623. Up to 3654 conditions per place. [2023-08-31 22:16:41,376 INFO L137 encePairwiseOnDemand]: 385/391 looper letters, 63 selfloop transitions, 2 changer transitions 0/80 dead transitions. [2023-08-31 22:16:41,377 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 80 transitions, 399 flow [2023-08-31 22:16:41,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:16:41,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:16:41,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 676 transitions. [2023-08-31 22:16:41,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5763000852514919 [2023-08-31 22:16:41,379 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 676 transitions. [2023-08-31 22:16:41,379 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 676 transitions. [2023-08-31 22:16:41,380 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:16:41,380 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 676 transitions. [2023-08-31 22:16:41,381 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 225.33333333333334) internal successors, (676), 3 states have internal predecessors, (676), 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) [2023-08-31 22:16:41,383 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 391.0) internal successors, (1564), 4 states have internal predecessors, (1564), 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) [2023-08-31 22:16:41,384 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 391.0) internal successors, (1564), 4 states have internal predecessors, (1564), 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) [2023-08-31 22:16:41,384 INFO L175 Difference]: Start difference. First operand has 81 places, 83 transitions, 271 flow. Second operand 3 states and 676 transitions. [2023-08-31 22:16:41,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 80 transitions, 399 flow [2023-08-31 22:16:41,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 80 transitions, 389 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-31 22:16:41,387 INFO L231 Difference]: Finished difference. Result has 75 places, 78 transitions, 255 flow [2023-08-31 22:16:41,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=391, PETRI_DIFFERENCE_MINUEND_FLOW=251, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=255, PETRI_PLACES=75, PETRI_TRANSITIONS=78} [2023-08-31 22:16:41,388 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -26 predicate places. [2023-08-31 22:16:41,388 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 78 transitions, 255 flow [2023-08-31 22:16:41,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 210.66666666666666) internal successors, (632), 3 states have internal predecessors, (632), 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) [2023-08-31 22:16:41,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:16:41,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:16:41,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-31 22:16:41,389 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-08-31 22:16:41,389 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:16:41,390 INFO L85 PathProgramCache]: Analyzing trace with hash 479736784, now seen corresponding path program 1 times [2023-08-31 22:16:41,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:16:41,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272460216] [2023-08-31 22:16:41,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:16:41,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:16:41,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:16:41,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:16:41,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:16:41,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272460216] [2023-08-31 22:16:41,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272460216] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:16:41,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:16:41,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 22:16:41,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443278622] [2023-08-31 22:16:41,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:16:41,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:16:41,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:16:41,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:16:41,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:16:41,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 391 [2023-08-31 22:16:41,541 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 78 transitions, 255 flow. Second operand has 3 states, 3 states have (on average 198.66666666666666) internal successors, (596), 3 states have internal predecessors, (596), 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) [2023-08-31 22:16:41,541 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:16:41,541 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 391 [2023-08-31 22:16:41,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:16:41,653 INFO L130 PetriNetUnfolder]: 566/1062 cut-off events. [2023-08-31 22:16:41,653 INFO L131 PetriNetUnfolder]: For 380/380 co-relation queries the response was YES. [2023-08-31 22:16:41,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2343 conditions, 1062 events. 566/1062 cut-off events. For 380/380 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 4178 event pairs, 503 based on Foata normal form. 0/902 useless extension candidates. Maximal degree in co-relation 2337. Up to 862 conditions per place. [2023-08-31 22:16:41,656 INFO L137 encePairwiseOnDemand]: 384/391 looper letters, 53 selfloop transitions, 4 changer transitions 0/76 dead transitions. [2023-08-31 22:16:41,656 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 76 transitions, 369 flow [2023-08-31 22:16:41,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:16:41,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:16:41,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 636 transitions. [2023-08-31 22:16:41,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5421994884910486 [2023-08-31 22:16:41,658 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 636 transitions. [2023-08-31 22:16:41,658 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 636 transitions. [2023-08-31 22:16:41,659 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:16:41,659 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 636 transitions. [2023-08-31 22:16:41,660 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 212.0) internal successors, (636), 3 states have internal predecessors, (636), 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) [2023-08-31 22:16:41,662 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 391.0) internal successors, (1564), 4 states have internal predecessors, (1564), 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) [2023-08-31 22:16:41,662 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 391.0) internal successors, (1564), 4 states have internal predecessors, (1564), 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) [2023-08-31 22:16:41,662 INFO L175 Difference]: Start difference. First operand has 75 places, 78 transitions, 255 flow. Second operand 3 states and 636 transitions. [2023-08-31 22:16:41,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 76 transitions, 369 flow [2023-08-31 22:16:41,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 76 transitions, 367 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 22:16:41,665 INFO L231 Difference]: Finished difference. Result has 72 places, 74 transitions, 253 flow [2023-08-31 22:16:41,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=391, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=253, PETRI_PLACES=72, PETRI_TRANSITIONS=74} [2023-08-31 22:16:41,666 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -29 predicate places. [2023-08-31 22:16:41,666 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 74 transitions, 253 flow [2023-08-31 22:16:41,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 198.66666666666666) internal successors, (596), 3 states have internal predecessors, (596), 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) [2023-08-31 22:16:41,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:16:41,666 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:16:41,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-31 22:16:41,667 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread0Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-08-31 22:16:41,667 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:16:41,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1465638315, now seen corresponding path program 1 times [2023-08-31 22:16:41,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:16:41,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141916253] [2023-08-31 22:16:41,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:16:41,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:16:41,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:16:41,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:16:41,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:16:41,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141916253] [2023-08-31 22:16:41,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141916253] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:16:41,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:16:41,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 22:16:41,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652551242] [2023-08-31 22:16:41,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:16:41,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:16:41,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:16:41,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:16:41,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:16:41,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 391 [2023-08-31 22:16:41,863 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 74 transitions, 253 flow. Second operand has 3 states, 3 states have (on average 207.66666666666666) internal successors, (623), 3 states have internal predecessors, (623), 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) [2023-08-31 22:16:41,864 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:16:41,864 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 391 [2023-08-31 22:16:41,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:16:41,985 INFO L130 PetriNetUnfolder]: 566/1038 cut-off events. [2023-08-31 22:16:41,985 INFO L131 PetriNetUnfolder]: For 379/379 co-relation queries the response was YES. [2023-08-31 22:16:41,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2334 conditions, 1038 events. 566/1038 cut-off events. For 379/379 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3934 event pairs, 506 based on Foata normal form. 0/917 useless extension candidates. Maximal degree in co-relation 2328. Up to 875 conditions per place. [2023-08-31 22:16:41,989 INFO L137 encePairwiseOnDemand]: 387/391 looper letters, 55 selfloop transitions, 3 changer transitions 0/73 dead transitions. [2023-08-31 22:16:41,989 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 73 transitions, 371 flow [2023-08-31 22:16:41,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:16:41,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:16:41,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 658 transitions. [2023-08-31 22:16:41,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609548167092924 [2023-08-31 22:16:41,991 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 658 transitions. [2023-08-31 22:16:41,991 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 658 transitions. [2023-08-31 22:16:41,992 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:16:41,992 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 658 transitions. [2023-08-31 22:16:41,993 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 219.33333333333334) internal successors, (658), 3 states have internal predecessors, (658), 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) [2023-08-31 22:16:41,996 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 391.0) internal successors, (1564), 4 states have internal predecessors, (1564), 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) [2023-08-31 22:16:41,996 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 391.0) internal successors, (1564), 4 states have internal predecessors, (1564), 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) [2023-08-31 22:16:41,996 INFO L175 Difference]: Start difference. First operand has 72 places, 74 transitions, 253 flow. Second operand 3 states and 658 transitions. [2023-08-31 22:16:41,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 73 transitions, 371 flow [2023-08-31 22:16:41,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 73 transitions, 363 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 22:16:41,999 INFO L231 Difference]: Finished difference. Result has 70 places, 72 transitions, 247 flow [2023-08-31 22:16:41,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=391, PETRI_DIFFERENCE_MINUEND_FLOW=241, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=247, PETRI_PLACES=70, PETRI_TRANSITIONS=72} [2023-08-31 22:16:42,002 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -31 predicate places. [2023-08-31 22:16:42,002 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 72 transitions, 247 flow [2023-08-31 22:16:42,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 207.66666666666666) internal successors, (623), 3 states have internal predecessors, (623), 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) [2023-08-31 22:16:42,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:16:42,003 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:16:42,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-31 22:16:42,003 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread0Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-08-31 22:16:42,003 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:16:42,003 INFO L85 PathProgramCache]: Analyzing trace with hash -646933216, now seen corresponding path program 1 times [2023-08-31 22:16:42,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:16:42,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147017123] [2023-08-31 22:16:42,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:16:42,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:16:42,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:16:42,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:16:42,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:16:42,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147017123] [2023-08-31 22:16:42,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147017123] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:16:42,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:16:42,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 22:16:42,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769786871] [2023-08-31 22:16:42,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:16:42,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 22:16:42,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:16:42,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 22:16:42,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-31 22:16:42,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 391 [2023-08-31 22:16:42,426 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 72 transitions, 247 flow. Second operand has 5 states, 5 states have (on average 202.8) internal successors, (1014), 5 states have internal predecessors, (1014), 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) [2023-08-31 22:16:42,426 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:16:42,426 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 391 [2023-08-31 22:16:42,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:16:42,565 INFO L130 PetriNetUnfolder]: 550/998 cut-off events. [2023-08-31 22:16:42,565 INFO L131 PetriNetUnfolder]: For 360/360 co-relation queries the response was YES. [2023-08-31 22:16:42,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2252 conditions, 998 events. 550/998 cut-off events. For 360/360 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3697 event pairs, 489 based on Foata normal form. 0/886 useless extension candidates. Maximal degree in co-relation 2246. Up to 847 conditions per place. [2023-08-31 22:16:42,569 INFO L137 encePairwiseOnDemand]: 386/391 looper letters, 54 selfloop transitions, 5 changer transitions 0/73 dead transitions. [2023-08-31 22:16:42,569 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 73 transitions, 378 flow [2023-08-31 22:16:42,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 22:16:42,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 22:16:42,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 850 transitions. [2023-08-31 22:16:42,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5434782608695652 [2023-08-31 22:16:42,572 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 850 transitions. [2023-08-31 22:16:42,572 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 850 transitions. [2023-08-31 22:16:42,573 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:16:42,573 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 850 transitions. [2023-08-31 22:16:42,574 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 212.5) internal successors, (850), 4 states have internal predecessors, (850), 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) [2023-08-31 22:16:42,576 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 391.0) internal successors, (1955), 5 states have internal predecessors, (1955), 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) [2023-08-31 22:16:42,577 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 391.0) internal successors, (1955), 5 states have internal predecessors, (1955), 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) [2023-08-31 22:16:42,577 INFO L175 Difference]: Start difference. First operand has 70 places, 72 transitions, 247 flow. Second operand 4 states and 850 transitions. [2023-08-31 22:16:42,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 73 transitions, 378 flow [2023-08-31 22:16:42,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 73 transitions, 372 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 22:16:42,580 INFO L231 Difference]: Finished difference. Result has 69 places, 70 transitions, 247 flow [2023-08-31 22:16:42,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=391, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=247, PETRI_PLACES=69, PETRI_TRANSITIONS=70} [2023-08-31 22:16:42,580 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -32 predicate places. [2023-08-31 22:16:42,581 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 70 transitions, 247 flow [2023-08-31 22:16:42,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 202.8) internal successors, (1014), 5 states have internal predecessors, (1014), 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) [2023-08-31 22:16:42,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:16:42,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:16:42,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-31 22:16:42,582 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread0Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-08-31 22:16:42,582 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:16:42,582 INFO L85 PathProgramCache]: Analyzing trace with hash -270838657, now seen corresponding path program 1 times [2023-08-31 22:16:42,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:16:42,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386547595] [2023-08-31 22:16:42,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:16:42,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:16:42,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:16:42,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:16:42,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:16:42,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386547595] [2023-08-31 22:16:42,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386547595] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:16:42,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:16:42,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 22:16:42,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106271185] [2023-08-31 22:16:42,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:16:42,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 22:16:42,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:16:42,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 22:16:42,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-31 22:16:42,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 391 [2023-08-31 22:16:42,902 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 70 transitions, 247 flow. Second operand has 4 states, 4 states have (on average 203.75) internal successors, (815), 4 states have internal predecessors, (815), 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) [2023-08-31 22:16:42,902 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:16:42,902 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 391 [2023-08-31 22:16:42,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:16:42,996 INFO L130 PetriNetUnfolder]: 451/839 cut-off events. [2023-08-31 22:16:42,996 INFO L131 PetriNetUnfolder]: For 310/310 co-relation queries the response was YES. [2023-08-31 22:16:42,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1906 conditions, 839 events. 451/839 cut-off events. For 310/310 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2940 event pairs, 390 based on Foata normal form. 0/787 useless extension candidates. Maximal degree in co-relation 1900. Up to 690 conditions per place. [2023-08-31 22:16:43,000 INFO L137 encePairwiseOnDemand]: 384/391 looper letters, 50 selfloop transitions, 5 changer transitions 0/69 dead transitions. [2023-08-31 22:16:43,000 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 69 transitions, 366 flow [2023-08-31 22:16:43,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 22:16:43,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 22:16:43,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 849 transitions. [2023-08-31 22:16:43,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5428388746803069 [2023-08-31 22:16:43,003 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 849 transitions. [2023-08-31 22:16:43,003 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 849 transitions. [2023-08-31 22:16:43,003 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:16:43,003 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 849 transitions. [2023-08-31 22:16:43,005 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 212.25) internal successors, (849), 4 states have internal predecessors, (849), 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) [2023-08-31 22:16:43,007 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 391.0) internal successors, (1955), 5 states have internal predecessors, (1955), 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) [2023-08-31 22:16:43,008 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 391.0) internal successors, (1955), 5 states have internal predecessors, (1955), 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) [2023-08-31 22:16:43,008 INFO L175 Difference]: Start difference. First operand has 69 places, 70 transitions, 247 flow. Second operand 4 states and 849 transitions. [2023-08-31 22:16:43,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 69 transitions, 366 flow [2023-08-31 22:16:43,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 69 transitions, 356 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-31 22:16:43,010 INFO L231 Difference]: Finished difference. Result has 65 places, 66 transitions, 239 flow [2023-08-31 22:16:43,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=391, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=239, PETRI_PLACES=65, PETRI_TRANSITIONS=66} [2023-08-31 22:16:43,011 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -36 predicate places. [2023-08-31 22:16:43,011 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 66 transitions, 239 flow [2023-08-31 22:16:43,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 203.75) internal successors, (815), 4 states have internal predecessors, (815), 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) [2023-08-31 22:16:43,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:16:43,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:16:43,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-31 22:16:43,012 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-08-31 22:16:43,013 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:16:43,013 INFO L85 PathProgramCache]: Analyzing trace with hash -2064658219, now seen corresponding path program 1 times [2023-08-31 22:16:43,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:16:43,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244257138] [2023-08-31 22:16:43,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:16:43,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:16:43,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:16:43,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:16:43,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:16:43,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244257138] [2023-08-31 22:16:43,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244257138] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:16:43,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:16:43,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-31 22:16:43,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414842859] [2023-08-31 22:16:43,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:16:43,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-31 22:16:43,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:16:43,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-31 22:16:43,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2023-08-31 22:16:45,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 391 [2023-08-31 22:16:45,243 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 66 transitions, 239 flow. Second operand has 15 states, 15 states have (on average 176.13333333333333) internal successors, (2642), 15 states have internal predecessors, (2642), 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) [2023-08-31 22:16:45,243 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:16:45,243 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 391 [2023-08-31 22:16:45,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:16:45,530 INFO L130 PetriNetUnfolder]: 494/881 cut-off events. [2023-08-31 22:16:45,530 INFO L131 PetriNetUnfolder]: For 316/316 co-relation queries the response was YES. [2023-08-31 22:16:45,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2037 conditions, 881 events. 494/881 cut-off events. For 316/316 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2982 event pairs, 431 based on Foata normal form. 1/830 useless extension candidates. Maximal degree in co-relation 2031. Up to 746 conditions per place. [2023-08-31 22:16:45,533 INFO L137 encePairwiseOnDemand]: 379/391 looper letters, 52 selfloop transitions, 14 changer transitions 0/73 dead transitions. [2023-08-31 22:16:45,534 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 73 transitions, 399 flow [2023-08-31 22:16:45,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-31 22:16:45,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-31 22:16:45,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1277 transitions. [2023-08-31 22:16:45,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46656923639020825 [2023-08-31 22:16:45,537 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1277 transitions. [2023-08-31 22:16:45,537 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1277 transitions. [2023-08-31 22:16:45,538 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:16:45,538 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1277 transitions. [2023-08-31 22:16:45,541 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 182.42857142857142) internal successors, (1277), 7 states have internal predecessors, (1277), 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) [2023-08-31 22:16:45,544 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 391.0) internal successors, (3128), 8 states have internal predecessors, (3128), 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) [2023-08-31 22:16:45,545 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 391.0) internal successors, (3128), 8 states have internal predecessors, (3128), 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) [2023-08-31 22:16:45,545 INFO L175 Difference]: Start difference. First operand has 65 places, 66 transitions, 239 flow. Second operand 7 states and 1277 transitions. [2023-08-31 22:16:45,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 73 transitions, 399 flow [2023-08-31 22:16:45,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 73 transitions, 389 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-31 22:16:45,547 INFO L231 Difference]: Finished difference. Result has 70 places, 67 transitions, 281 flow [2023-08-31 22:16:45,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=391, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=281, PETRI_PLACES=70, PETRI_TRANSITIONS=67} [2023-08-31 22:16:45,549 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -31 predicate places. [2023-08-31 22:16:45,549 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 67 transitions, 281 flow [2023-08-31 22:16:45,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 176.13333333333333) internal successors, (2642), 15 states have internal predecessors, (2642), 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) [2023-08-31 22:16:45,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:16:45,550 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:16:45,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-31 22:16:45,551 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-08-31 22:16:45,551 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:16:45,551 INFO L85 PathProgramCache]: Analyzing trace with hash 420102470, now seen corresponding path program 1 times [2023-08-31 22:16:45,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:16:45,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048756688] [2023-08-31 22:16:45,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:16:45,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:16:45,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:16:46,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:16:46,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:16:46,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048756688] [2023-08-31 22:16:46,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048756688] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:16:46,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:16:46,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-31 22:16:46,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587606335] [2023-08-31 22:16:46,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:16:46,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-31 22:16:46,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:16:46,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-31 22:16:46,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2023-08-31 22:16:47,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 391 [2023-08-31 22:16:47,011 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 67 transitions, 281 flow. Second operand has 15 states, 15 states have (on average 176.26666666666668) internal successors, (2644), 15 states have internal predecessors, (2644), 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) [2023-08-31 22:16:47,011 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:16:47,011 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 391 [2023-08-31 22:16:47,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:16:47,195 INFO L130 PetriNetUnfolder]: 444/830 cut-off events. [2023-08-31 22:16:47,195 INFO L131 PetriNetUnfolder]: For 340/340 co-relation queries the response was YES. [2023-08-31 22:16:47,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1915 conditions, 830 events. 444/830 cut-off events. For 340/340 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2927 event pairs, 381 based on Foata normal form. 1/779 useless extension candidates. Maximal degree in co-relation 1908. Up to 667 conditions per place. [2023-08-31 22:16:47,197 INFO L137 encePairwiseOnDemand]: 376/391 looper letters, 47 selfloop transitions, 21 changer transitions 0/77 dead transitions. [2023-08-31 22:16:47,197 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 77 transitions, 466 flow [2023-08-31 22:16:47,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-31 22:16:47,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-31 22:16:47,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1974 transitions. [2023-08-31 22:16:47,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4589630318530574 [2023-08-31 22:16:47,202 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1974 transitions. [2023-08-31 22:16:47,202 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1974 transitions. [2023-08-31 22:16:47,203 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:16:47,203 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1974 transitions. [2023-08-31 22:16:47,206 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 179.45454545454547) internal successors, (1974), 11 states have internal predecessors, (1974), 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) [2023-08-31 22:16:47,212 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 391.0) internal successors, (4692), 12 states have internal predecessors, (4692), 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) [2023-08-31 22:16:47,212 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 391.0) internal successors, (4692), 12 states have internal predecessors, (4692), 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) [2023-08-31 22:16:47,212 INFO L175 Difference]: Start difference. First operand has 70 places, 67 transitions, 281 flow. Second operand 11 states and 1974 transitions. [2023-08-31 22:16:47,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 77 transitions, 466 flow [2023-08-31 22:16:47,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 77 transitions, 451 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-31 22:16:47,215 INFO L231 Difference]: Finished difference. Result has 78 places, 68 transitions, 335 flow [2023-08-31 22:16:47,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=391, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=335, PETRI_PLACES=78, PETRI_TRANSITIONS=68} [2023-08-31 22:16:47,217 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -23 predicate places. [2023-08-31 22:16:47,217 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 68 transitions, 335 flow [2023-08-31 22:16:47,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 176.26666666666668) internal successors, (2644), 15 states have internal predecessors, (2644), 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) [2023-08-31 22:16:47,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:16:47,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:16:47,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-31 22:16:47,219 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-08-31 22:16:47,219 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:16:47,219 INFO L85 PathProgramCache]: Analyzing trace with hash 138273493, now seen corresponding path program 1 times [2023-08-31 22:16:47,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:16:47,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049456550] [2023-08-31 22:16:47,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:16:47,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:16:47,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:16:47,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:16:47,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:16:47,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049456550] [2023-08-31 22:16:47,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049456550] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:16:47,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:16:47,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-31 22:16:47,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965881430] [2023-08-31 22:16:47,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:16:47,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-31 22:16:47,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:16:47,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-31 22:16:47,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2023-08-31 22:16:48,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 391 [2023-08-31 22:16:48,811 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 68 transitions, 335 flow. Second operand has 15 states, 15 states have (on average 176.26666666666668) internal successors, (2644), 15 states have internal predecessors, (2644), 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) [2023-08-31 22:16:48,811 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:16:48,811 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 391 [2023-08-31 22:16:48,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:16:49,021 INFO L130 PetriNetUnfolder]: 448/833 cut-off events. [2023-08-31 22:16:49,021 INFO L131 PetriNetUnfolder]: For 376/376 co-relation queries the response was YES. [2023-08-31 22:16:49,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1966 conditions, 833 events. 448/833 cut-off events. For 376/376 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2928 event pairs, 385 based on Foata normal form. 1/782 useless extension candidates. Maximal degree in co-relation 1957. Up to 678 conditions per place. [2023-08-31 22:16:49,023 INFO L137 encePairwiseOnDemand]: 377/391 looper letters, 49 selfloop transitions, 20 changer transitions 0/77 dead transitions. [2023-08-31 22:16:49,024 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 77 transitions, 519 flow [2023-08-31 22:16:49,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-31 22:16:49,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-31 22:16:49,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1974 transitions. [2023-08-31 22:16:49,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4589630318530574 [2023-08-31 22:16:49,027 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1974 transitions. [2023-08-31 22:16:49,027 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1974 transitions. [2023-08-31 22:16:49,028 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:16:49,028 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1974 transitions. [2023-08-31 22:16:49,031 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 179.45454545454547) internal successors, (1974), 11 states have internal predecessors, (1974), 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) [2023-08-31 22:16:49,036 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 391.0) internal successors, (4692), 12 states have internal predecessors, (4692), 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) [2023-08-31 22:16:49,037 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 391.0) internal successors, (4692), 12 states have internal predecessors, (4692), 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) [2023-08-31 22:16:49,037 INFO L175 Difference]: Start difference. First operand has 78 places, 68 transitions, 335 flow. Second operand 11 states and 1974 transitions. [2023-08-31 22:16:49,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 77 transitions, 519 flow [2023-08-31 22:16:49,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 77 transitions, 488 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-08-31 22:16:49,040 INFO L231 Difference]: Finished difference. Result has 82 places, 69 transitions, 373 flow [2023-08-31 22:16:49,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=391, PETRI_DIFFERENCE_MINUEND_FLOW=304, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=373, PETRI_PLACES=82, PETRI_TRANSITIONS=69} [2023-08-31 22:16:49,041 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -19 predicate places. [2023-08-31 22:16:49,041 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 69 transitions, 373 flow [2023-08-31 22:16:49,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 176.26666666666668) internal successors, (2644), 15 states have internal predecessors, (2644), 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) [2023-08-31 22:16:49,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:16:49,042 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:16:49,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-31 22:16:49,042 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-08-31 22:16:49,042 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:16:49,042 INFO L85 PathProgramCache]: Analyzing trace with hash -8493953, now seen corresponding path program 1 times [2023-08-31 22:16:49,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:16:49,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632546146] [2023-08-31 22:16:49,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:16:49,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:16:49,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:16:49,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:16:49,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:16:49,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632546146] [2023-08-31 22:16:49,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632546146] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:16:49,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:16:49,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-31 22:16:49,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307231864] [2023-08-31 22:16:49,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:16:49,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-31 22:16:49,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:16:49,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-31 22:16:49,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2023-08-31 22:16:50,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 391 [2023-08-31 22:16:50,356 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 69 transitions, 373 flow. Second operand has 15 states, 15 states have (on average 176.26666666666668) internal successors, (2644), 15 states have internal predecessors, (2644), 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) [2023-08-31 22:16:50,357 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:16:50,357 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 391 [2023-08-31 22:16:50,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:16:50,512 INFO L130 PetriNetUnfolder]: 442/826 cut-off events. [2023-08-31 22:16:50,512 INFO L131 PetriNetUnfolder]: For 402/402 co-relation queries the response was YES. [2023-08-31 22:16:50,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1960 conditions, 826 events. 442/826 cut-off events. For 402/402 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2909 event pairs, 379 based on Foata normal form. 1/775 useless extension candidates. Maximal degree in co-relation 1949. Up to 667 conditions per place. [2023-08-31 22:16:50,515 INFO L137 encePairwiseOnDemand]: 377/391 looper letters, 49 selfloop transitions, 21 changer transitions 0/79 dead transitions. [2023-08-31 22:16:50,515 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 79 transitions, 568 flow [2023-08-31 22:16:50,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-31 22:16:50,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-31 22:16:50,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2322 transitions. [2023-08-31 22:16:50,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45681684044855403 [2023-08-31 22:16:50,524 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2322 transitions. [2023-08-31 22:16:50,524 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2322 transitions. [2023-08-31 22:16:50,525 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:16:50,525 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2322 transitions. [2023-08-31 22:16:50,528 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 178.6153846153846) internal successors, (2322), 13 states have internal predecessors, (2322), 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) [2023-08-31 22:16:50,533 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 391.0) internal successors, (5474), 14 states have internal predecessors, (5474), 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) [2023-08-31 22:16:50,534 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 391.0) internal successors, (5474), 14 states have internal predecessors, (5474), 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) [2023-08-31 22:16:50,534 INFO L175 Difference]: Start difference. First operand has 82 places, 69 transitions, 373 flow. Second operand 13 states and 2322 transitions. [2023-08-31 22:16:50,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 79 transitions, 568 flow [2023-08-31 22:16:50,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 79 transitions, 537 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-08-31 22:16:50,537 INFO L231 Difference]: Finished difference. Result has 88 places, 70 transitions, 413 flow [2023-08-31 22:16:50,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=391, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=413, PETRI_PLACES=88, PETRI_TRANSITIONS=70} [2023-08-31 22:16:50,538 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -13 predicate places. [2023-08-31 22:16:50,538 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 70 transitions, 413 flow [2023-08-31 22:16:50,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 176.26666666666668) internal successors, (2644), 15 states have internal predecessors, (2644), 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) [2023-08-31 22:16:50,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:16:50,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:16:50,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-31 22:16:50,539 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-08-31 22:16:50,540 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:16:50,540 INFO L85 PathProgramCache]: Analyzing trace with hash -263312089, now seen corresponding path program 1 times [2023-08-31 22:16:50,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:16:50,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072685842] [2023-08-31 22:16:50,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:16:50,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:16:50,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:16:51,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:16:51,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:16:51,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072685842] [2023-08-31 22:16:51,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072685842] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:16:51,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:16:51,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-31 22:16:51,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906147051] [2023-08-31 22:16:51,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:16:51,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-31 22:16:51,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:16:51,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-31 22:16:51,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2023-08-31 22:16:51,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 391 [2023-08-31 22:16:51,989 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 70 transitions, 413 flow. Second operand has 15 states, 15 states have (on average 176.26666666666668) internal successors, (2644), 15 states have internal predecessors, (2644), 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) [2023-08-31 22:16:51,989 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:16:51,989 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 391 [2023-08-31 22:16:51,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:16:52,176 INFO L130 PetriNetUnfolder]: 442/825 cut-off events. [2023-08-31 22:16:52,177 INFO L131 PetriNetUnfolder]: For 434/434 co-relation queries the response was YES. [2023-08-31 22:16:52,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1972 conditions, 825 events. 442/825 cut-off events. For 434/434 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2907 event pairs, 379 based on Foata normal form. 1/774 useless extension candidates. Maximal degree in co-relation 1959. Up to 667 conditions per place. [2023-08-31 22:16:52,180 INFO L137 encePairwiseOnDemand]: 378/391 looper letters, 44 selfloop transitions, 22 changer transitions 0/75 dead transitions. [2023-08-31 22:16:52,180 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 75 transitions, 565 flow [2023-08-31 22:16:52,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-31 22:16:52,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-31 22:16:52,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2142 transitions. [2023-08-31 22:16:52,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45652173913043476 [2023-08-31 22:16:52,184 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2142 transitions. [2023-08-31 22:16:52,185 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2142 transitions. [2023-08-31 22:16:52,185 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:16:52,186 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2142 transitions. [2023-08-31 22:16:52,188 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 178.5) internal successors, (2142), 12 states have internal predecessors, (2142), 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) [2023-08-31 22:16:52,193 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 391.0) internal successors, (5083), 13 states have internal predecessors, (5083), 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) [2023-08-31 22:16:52,194 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 391.0) internal successors, (5083), 13 states have internal predecessors, (5083), 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) [2023-08-31 22:16:52,194 INFO L175 Difference]: Start difference. First operand has 88 places, 70 transitions, 413 flow. Second operand 12 states and 2142 transitions. [2023-08-31 22:16:52,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 75 transitions, 565 flow [2023-08-31 22:16:52,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 75 transitions, 509 flow, removed 0 selfloop flow, removed 14 redundant places. [2023-08-31 22:16:52,197 INFO L231 Difference]: Finished difference. Result has 84 places, 69 transitions, 389 flow [2023-08-31 22:16:52,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=391, PETRI_DIFFERENCE_MINUEND_FLOW=345, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=389, PETRI_PLACES=84, PETRI_TRANSITIONS=69} [2023-08-31 22:16:52,198 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -17 predicate places. [2023-08-31 22:16:52,198 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 69 transitions, 389 flow [2023-08-31 22:16:52,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 176.26666666666668) internal successors, (2644), 15 states have internal predecessors, (2644), 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) [2023-08-31 22:16:52,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:16:52,199 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:16:52,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-31 22:16:52,199 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-08-31 22:16:52,199 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:16:52,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1357972025, now seen corresponding path program 1 times [2023-08-31 22:16:52,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:16:52,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405520126] [2023-08-31 22:16:52,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:16:52,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:16:52,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:16:52,248 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:16:52,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:16:52,316 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:16:52,317 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:16:52,318 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK (72 of 73 remaining) [2023-08-31 22:16:52,319 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (71 of 73 remaining) [2023-08-31 22:16:52,320 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (70 of 73 remaining) [2023-08-31 22:16:52,320 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (69 of 73 remaining) [2023-08-31 22:16:52,320 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (68 of 73 remaining) [2023-08-31 22:16:52,321 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (67 of 73 remaining) [2023-08-31 22:16:52,321 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (66 of 73 remaining) [2023-08-31 22:16:52,321 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (65 of 73 remaining) [2023-08-31 22:16:52,321 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (64 of 73 remaining) [2023-08-31 22:16:52,321 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (63 of 73 remaining) [2023-08-31 22:16:52,321 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (62 of 73 remaining) [2023-08-31 22:16:52,322 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (61 of 73 remaining) [2023-08-31 22:16:52,322 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (60 of 73 remaining) [2023-08-31 22:16:52,322 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 73 remaining) [2023-08-31 22:16:52,322 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (58 of 73 remaining) [2023-08-31 22:16:52,323 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 73 remaining) [2023-08-31 22:16:52,323 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 73 remaining) [2023-08-31 22:16:52,323 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (55 of 73 remaining) [2023-08-31 22:16:52,324 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 73 remaining) [2023-08-31 22:16:52,324 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 73 remaining) [2023-08-31 22:16:52,324 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 73 remaining) [2023-08-31 22:16:52,324 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (51 of 73 remaining) [2023-08-31 22:16:52,324 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err6INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (50 of 73 remaining) [2023-08-31 22:16:52,324 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err7INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (49 of 73 remaining) [2023-08-31 22:16:52,324 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err8INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (48 of 73 remaining) [2023-08-31 22:16:52,325 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err10INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (47 of 73 remaining) [2023-08-31 22:16:52,325 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 73 remaining) [2023-08-31 22:16:52,325 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 73 remaining) [2023-08-31 22:16:52,325 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 73 remaining) [2023-08-31 22:16:52,325 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 73 remaining) [2023-08-31 22:16:52,325 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 73 remaining) [2023-08-31 22:16:52,325 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 73 remaining) [2023-08-31 22:16:52,326 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 73 remaining) [2023-08-31 22:16:52,326 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 73 remaining) [2023-08-31 22:16:52,326 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 73 remaining) [2023-08-31 22:16:52,326 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 73 remaining) [2023-08-31 22:16:52,326 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 73 remaining) [2023-08-31 22:16:52,326 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 73 remaining) [2023-08-31 22:16:52,326 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (34 of 73 remaining) [2023-08-31 22:16:52,326 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (33 of 73 remaining) [2023-08-31 22:16:52,327 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 73 remaining) [2023-08-31 22:16:52,327 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 73 remaining) [2023-08-31 22:16:52,327 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 73 remaining) [2023-08-31 22:16:52,327 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 73 remaining) [2023-08-31 22:16:52,327 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 73 remaining) [2023-08-31 22:16:52,328 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 73 remaining) [2023-08-31 22:16:52,328 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 73 remaining) [2023-08-31 22:16:52,328 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 73 remaining) [2023-08-31 22:16:52,328 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 73 remaining) [2023-08-31 22:16:52,328 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 73 remaining) [2023-08-31 22:16:52,328 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 73 remaining) [2023-08-31 22:16:52,328 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 73 remaining) [2023-08-31 22:16:52,329 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 73 remaining) [2023-08-31 22:16:52,329 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 73 remaining) [2023-08-31 22:16:52,329 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 73 remaining) [2023-08-31 22:16:52,329 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 73 remaining) [2023-08-31 22:16:52,329 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 73 remaining) [2023-08-31 22:16:52,329 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 73 remaining) [2023-08-31 22:16:52,329 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 73 remaining) [2023-08-31 22:16:52,330 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 73 remaining) [2023-08-31 22:16:52,330 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Thread1of1ForFork2Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 73 remaining) [2023-08-31 22:16:52,330 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Thread1of1ForFork2Err2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (11 of 73 remaining) [2023-08-31 22:16:52,330 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Thread1of1ForFork2Err4INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (10 of 73 remaining) [2023-08-31 22:16:52,330 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Thread1of1ForFork2Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 73 remaining) [2023-08-31 22:16:52,330 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Thread1of1ForFork2Err9INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 73 remaining) [2023-08-31 22:16:52,330 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 73 remaining) [2023-08-31 22:16:52,330 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 73 remaining) [2023-08-31 22:16:52,331 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 73 remaining) [2023-08-31 22:16:52,331 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 73 remaining) [2023-08-31 22:16:52,331 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 73 remaining) [2023-08-31 22:16:52,331 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 73 remaining) [2023-08-31 22:16:52,331 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 73 remaining) [2023-08-31 22:16:52,331 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 73 remaining) [2023-08-31 22:16:52,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-31 22:16:52,332 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:16:52,338 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-31 22:16:52,338 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-31 22:16:52,434 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.08 10:16:52 BasicIcfg [2023-08-31 22:16:52,434 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-31 22:16:52,434 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-08-31 22:16:52,434 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-08-31 22:16:52,435 INFO L275 PluginConnector]: Witness Printer initialized [2023-08-31 22:16:52,435 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 10:16:21" (3/4) ... [2023-08-31 22:16:52,437 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-08-31 22:16:52,437 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-08-31 22:16:52,438 INFO L158 Benchmark]: Toolchain (without parser) took 31800.46ms. Allocated memory was 86.0MB in the beginning and 6.4GB in the end (delta: 6.3GB). Free memory was 64.8MB in the beginning and 4.6GB in the end (delta: -4.6GB). Peak memory consumption was 1.7GB. Max. memory is 16.1GB. [2023-08-31 22:16:52,438 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 65.0MB. Free memory is still 42.9MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-31 22:16:52,438 INFO L158 Benchmark]: CACSL2BoogieTranslator took 634.74ms. Allocated memory is still 86.0MB. Free memory was 64.5MB in the beginning and 50.4MB in the end (delta: 14.2MB). Peak memory consumption was 25.0MB. Max. memory is 16.1GB. [2023-08-31 22:16:52,438 INFO L158 Benchmark]: Boogie Procedure Inliner took 62.58ms. Allocated memory is still 86.0MB. Free memory was 50.4MB in the beginning and 48.0MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-31 22:16:52,439 INFO L158 Benchmark]: Boogie Preprocessor took 40.84ms. Allocated memory is still 86.0MB. Free memory was 48.0MB in the beginning and 46.3MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-31 22:16:52,439 INFO L158 Benchmark]: RCFGBuilder took 554.85ms. Allocated memory is still 86.0MB. Free memory was 46.3MB in the beginning and 49.2MB in the end (delta: -2.9MB). Peak memory consumption was 12.5MB. Max. memory is 16.1GB. [2023-08-31 22:16:52,439 INFO L158 Benchmark]: TraceAbstraction took 30499.13ms. Allocated memory was 86.0MB in the beginning and 6.4GB in the end (delta: 6.3GB). Free memory was 48.4MB in the beginning and 4.6GB in the end (delta: -4.6GB). Peak memory consumption was 1.7GB. Max. memory is 16.1GB. [2023-08-31 22:16:52,441 INFO L158 Benchmark]: Witness Printer took 2.90ms. Allocated memory is still 6.4GB. Free memory is still 4.6GB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-31 22:16:52,442 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 65.0MB. Free memory is still 42.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 634.74ms. Allocated memory is still 86.0MB. Free memory was 64.5MB in the beginning and 50.4MB in the end (delta: 14.2MB). Peak memory consumption was 25.0MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 62.58ms. Allocated memory is still 86.0MB. Free memory was 50.4MB in the beginning and 48.0MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 40.84ms. Allocated memory is still 86.0MB. Free memory was 48.0MB in the beginning and 46.3MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 554.85ms. Allocated memory is still 86.0MB. Free memory was 46.3MB in the beginning and 49.2MB in the end (delta: -2.9MB). Peak memory consumption was 12.5MB. Max. memory is 16.1GB. * TraceAbstraction took 30499.13ms. Allocated memory was 86.0MB in the beginning and 6.4GB in the end (delta: 6.3GB). Free memory was 48.4MB in the beginning and 4.6GB in the end (delta: -4.6GB). Peak memory consumption was 1.7GB. Max. memory is 16.1GB. * Witness Printer took 2.90ms. Allocated memory is still 6.4GB. Free memory is still 4.6GB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.0s, 180 PlacesBefore, 101 PlacesAfterwards, 168 TransitionsBefore, 87 TransitionsAfterwards, 2920 CoEnabledTransitionPairs, 5 FixpointIterations, 48 TrivialSequentialCompositions, 81 ConcurrentSequentialCompositions, 7 TrivialYvCompositions, 0 ConcurrentYvCompositions, 2 ChoiceCompositions, 138 TotalNumberOfCompositions, 6675 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 4629, independent: 4385, independent conditional: 0, independent unconditional: 4385, dependent: 244, dependent conditional: 0, dependent unconditional: 244, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1295, independent: 1230, independent conditional: 0, independent unconditional: 1230, dependent: 65, dependent conditional: 0, dependent unconditional: 65, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 4629, independent: 3155, independent conditional: 0, independent unconditional: 3155, dependent: 179, dependent conditional: 0, dependent unconditional: 179, unknown: 1295, unknown conditional: 0, unknown unconditional: 1295] , Statistics on independence cache: Total cache size (in pairs): 189, Positive cache size: 162, Positive conditional cache size: 0, Positive unconditional cache size: 162, Negative cache size: 27, Negative conditional cache size: 0, Negative unconditional cache size: 27, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - UnprovableResult [Line: 1159]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 1159. Possible FailurePath: [L1124] 0 char *v; [L1161] 0 pthread_t t; [L1162] FCALL, FORK 0 pthread_create(&t, 0, thread0, 0) VAL [arg={0:0}, pthread_create(&t, 0, thread0, 0)=14, t={9:0}, v={0:0}] [L1146] 1 pthread_t t1, t2, t3, t4, t5; [L1147] FCALL, FORK 1 pthread_create(&t1, 0, thread1, 0) VAL [arg={0:0}, arg={0:0}, arg={0:0}, pthread_create(&t1, 0, thread1, 0)=15, t1={10:0}, t2={11:0}, t3={12:0}, t4={13:0}, t5={8:0}, v={0:0}] [L1148] 1 \read(t1) VAL [\read(t1)=15, arg={0:0}, arg={0:0}, arg={0:0}, t1={10:0}, t2={11:0}, t3={12:0}, t4={13:0}, t5={8:0}, v={0:0}] [L1127] 2 v = malloc(sizeof(char)) [L1128] 2 return 0; [L1163] 0 \read(t) VAL [\read(t)=14, \read(t1)=15, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t1={10:0}, t2={11:0}, t3={12:0}, t4={13:0}, t5={8:0}, t={9:0}, v={6:0}] [L1148] FCALL, JOIN 2 pthread_join(t1, 0) VAL [\read(t1)=15, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t1={10:0}, t2={11:0}, t3={12:0}, t4={13:0}, t5={8:0}, v={6:0}] [L1149] FCALL, FORK 1 pthread_create(&t2, 0, thread2, 0) VAL [\result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, pthread_create(&t2, 0, thread2, 0)=16, t1={10:0}, t2={11:0}, t3={12:0}, t4={13:0}, t5={8:0}, v={6:0}] [L1133] 3 v[0] = 'X' [L1135] 3 return 0; [L1150] FCALL, FORK 1 pthread_create(&t3, 0, thread3, 0) VAL [\result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, pthread_create(&t3, 0, thread3, 0)=17, t1={10:0}, t2={11:0}, t3={12:0}, t4={13:0}, t5={8:0}, v={6:0}] [L1140] 4 v[0] = 'Y' [L1142] 4 return 0; [L1151] FCALL, FORK 1 pthread_create(&t4, 0, thread2, 0) VAL [\result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, pthread_create(&t4, 0, thread2, 0)=18, t1={10:0}, t2={11:0}, t3={12:0}, t4={13:0}, t5={8:0}, v={6:0}] [L1133] 5 v[0] = 'X' [L1135] 5 return 0; [L1152] FCALL, FORK 1 pthread_create(&t5, 0, thread2, 0) VAL [\result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, pthread_create(&t5, 0, thread2, 0)=19, t1={10:0}, t2={11:0}, t3={12:0}, t4={13:0}, t5={8:0}, v={6:0}] [L1133] 6 v[0] = 'X' [L1135] 6 return 0; [L1153] 1 \read(t2) VAL [\read(t2)=16, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t1={10:0}, t2={11:0}, t3={12:0}, t4={13:0}, t5={8:0}, v={6:0}] [L1153] FCALL, JOIN 3 pthread_join(t2, 0) VAL [\read(t2)=16, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t1={10:0}, t2={11:0}, t3={12:0}, t4={13:0}, t5={8:0}, v={6:0}] [L1154] 1 \read(t3) VAL [\read(t3)=17, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t1={10:0}, t2={11:0}, t3={12:0}, t4={13:0}, t5={8:0}, v={6:0}] [L1154] FCALL, JOIN 4 pthread_join(t3, 0) VAL [\read(t3)=17, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t1={10:0}, t2={11:0}, t3={12:0}, t4={13:0}, t5={8:0}, v={6:0}] [L1155] 1 \read(t4) VAL [\read(t4)=18, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t1={10:0}, t2={11:0}, t3={12:0}, t4={13:0}, t5={8:0}, v={6:0}] [L1155] FCALL, JOIN 5 pthread_join(t4, 0) VAL [\read(t4)=18, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t1={10:0}, t2={11:0}, t3={12:0}, t4={13:0}, t5={8:0}, v={6:0}] [L1156] 1 \read(t5) VAL [\read(t5)=19, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t1={10:0}, t2={11:0}, t3={12:0}, t4={13:0}, t5={8:0}, v={6:0}] [L1156] FCALL, JOIN 6 pthread_join(t5, 0) VAL [\read(t5)=19, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t1={10:0}, t2={11:0}, t3={12:0}, t4={13:0}, t5={8:0}, v={6:0}] [L1157] 1 return 0; [L1157] 1 return 0; VAL [\result={0:0}, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t2={11:0}, t3={12:0}, t4={13:0}, t5={8:0}, v={6:0}] [L1157] 1 return 0; VAL [\result={0:0}, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t3={12:0}, t4={13:0}, t5={8:0}, v={6:0}] [L1157] 1 return 0; VAL [\result={0:0}, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t4={13:0}, t5={8:0}, v={6:0}] [L1157] 1 return 0; [L1157] 1 return 0; [L1163] FCALL, JOIN 1 pthread_join(t, 0) VAL [\read(t)=14, \result={0:0}, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t={9:0}, v={6:0}] [L1164] EXPR 0 v[0] [L1164] EXPR 0 v[0] == 'X' || v[0] == 'Y' [L1164] CALL 0 __VERIFIER_assert(v[0] == 'X' || v[0] == 'Y') [L1123] COND FALSE 0 !(!expression) [L1164] RET 0 __VERIFIER_assert(v[0] == 'X' || v[0] == 'Y') [L1165] 0 return 0; [L1165] 0 return 0; - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1151]: 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: 1152]: 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: 1150]: 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: 1149]: 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: 1147]: 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: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1123]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1162]: 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: 1150]: 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: 1152]: 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: 1149]: 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: 1151]: 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: 1147]: 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. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 11 procedures, 288 locations, 73 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: 30.1s, OverallIterations: 20, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 20.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 9664 SdHoareTripleChecker+Valid, 8.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 6946 mSDsluCounter, 1697 SdHoareTripleChecker+Invalid, 6.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1323 mSDsCounter, 600 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 14352 IncrementalHoareTripleChecker+Invalid, 14952 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 600 mSolverCounterUnsat, 374 mSDtfsCounter, 14352 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 130 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=413occurred in iteration=18, InterpolantAutomatonStates: 100, 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, 0.3s SatisfiabilityAnalysisTime, 4.8s InterpolantComputationTime, 411 NumberOfCodeBlocks, 411 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 347 ConstructedInterpolants, 0 QuantifiedInterpolants, 6097 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 19 InterpolantComputations, 19 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 could not prove your program: unable to determine feasibility of some traces [2023-08-31 22:16:52,470 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... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/pthread/singleton_with-uninit-problems.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9556b3eb7217f056a72a299bf0514e64606a248fa454b59dcc03e4a2e74c7c90 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-31 22:16:54,606 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 22:16:54,608 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 22:16:54,649 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 22:16:54,651 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 22:16:54,654 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 22:16:54,656 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 22:16:54,658 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 22:16:54,661 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 22:16:54,665 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 22:16:54,666 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 22:16:54,668 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 22:16:54,668 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 22:16:54,670 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 22:16:54,671 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 22:16:54,675 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 22:16:54,675 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 22:16:54,677 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 22:16:54,678 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 22:16:54,682 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 22:16:54,683 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 22:16:54,684 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 22:16:54,685 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 22:16:54,685 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 22:16:54,691 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 22:16:54,692 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 22:16:54,692 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 22:16:54,694 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 22:16:54,694 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 22:16:54,695 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 22:16:54,695 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 22:16:54,700 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 22:16:54,702 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 22:16:54,702 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 22:16:54,703 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 22:16:54,703 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 22:16:54,704 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 22:16:54,704 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 22:16:54,704 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 22:16:54,715 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 22:16:54,716 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 22:16:54,721 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-31 22:16:54,752 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 22:16:54,752 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 22:16:54,753 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 22:16:54,753 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 22:16:54,754 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 22:16:54,755 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 22:16:54,755 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 22:16:54,755 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 22:16:54,756 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 22:16:54,756 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 22:16:54,757 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 22:16:54,757 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-31 22:16:54,757 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 22:16:54,757 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 22:16:54,757 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 22:16:54,758 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-31 22:16:54,758 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-31 22:16:54,758 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-31 22:16:54,758 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 22:16:54,759 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-31 22:16:54,759 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-31 22:16:54,759 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-31 22:16:54,759 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 22:16:54,759 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 22:16:54,760 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 22:16:54,760 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 22:16:54,760 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 22:16:54,760 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 22:16:54,761 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 22:16:54,761 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 22:16:54,761 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-31 22:16:54,761 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-31 22:16:54,762 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 22:16:54,762 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 22:16:54,762 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 22:16:54,762 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-31 22:16:54,762 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 22:16:54,763 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9556b3eb7217f056a72a299bf0514e64606a248fa454b59dcc03e4a2e74c7c90 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-08-31 22:16:55,088 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 22:16:55,108 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 22:16:55,110 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 22:16:55,111 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 22:16:55,111 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 22:16:55,113 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/singleton_with-uninit-problems.i [2023-08-31 22:16:56,242 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 22:16:56,571 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 22:16:56,571 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/singleton_with-uninit-problems.i [2023-08-31 22:16:56,588 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa23077c6/53a09f8bd670458da5b50aba2009cd6a/FLAGb9ad7efa0 [2023-08-31 22:16:56,609 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa23077c6/53a09f8bd670458da5b50aba2009cd6a [2023-08-31 22:16:56,612 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 22:16:56,613 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 22:16:56,615 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 22:16:56,615 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 22:16:56,618 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 22:16:56,618 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 10:16:56" (1/1) ... [2023-08-31 22:16:56,620 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e0cd77d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:16:56, skipping insertion in model container [2023-08-31 22:16:56,620 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 10:16:56" (1/1) ... [2023-08-31 22:16:56,625 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 22:16:56,667 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 22:16:56,846 WARN L633 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-31 22:16:57,065 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/singleton_with-uninit-problems.i[55568,55581] [2023-08-31 22:16:57,091 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 22:16:57,105 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 22:16:57,134 WARN L633 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-31 22:16:57,155 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/singleton_with-uninit-problems.i[55568,55581] [2023-08-31 22:16:57,168 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 22:16:57,297 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-31 22:16:57,297 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-31 22:16:57,298 WARN L667 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-08-31 22:16:57,303 INFO L208 MainTranslator]: Completed translation [2023-08-31 22:16:57,304 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:16:57 WrapperNode [2023-08-31 22:16:57,304 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 22:16:57,305 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 22:16:57,305 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 22:16:57,306 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 22:16:57,312 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:16:57" (1/1) ... [2023-08-31 22:16:57,346 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:16:57" (1/1) ... [2023-08-31 22:16:57,372 INFO L138 Inliner]: procedures = 328, calls = 53, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 42 [2023-08-31 22:16:57,373 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 22:16:57,373 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 22:16:57,374 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 22:16:57,374 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 22:16:57,381 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:16:57" (1/1) ... [2023-08-31 22:16:57,382 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:16:57" (1/1) ... [2023-08-31 22:16:57,396 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:16:57" (1/1) ... [2023-08-31 22:16:57,397 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:16:57" (1/1) ... [2023-08-31 22:16:57,409 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:16:57" (1/1) ... [2023-08-31 22:16:57,417 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:16:57" (1/1) ... [2023-08-31 22:16:57,419 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:16:57" (1/1) ... [2023-08-31 22:16:57,429 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:16:57" (1/1) ... [2023-08-31 22:16:57,432 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 22:16:57,435 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 22:16:57,436 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 22:16:57,436 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 22:16:57,437 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:16:57" (1/1) ... [2023-08-31 22:16:57,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 22:16:57,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 22:16:57,470 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) [2023-08-31 22:16:57,496 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 [2023-08-31 22:16:57,510 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2023-08-31 22:16:57,510 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-31 22:16:57,510 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-31 22:16:57,510 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 22:16:57,511 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2023-08-31 22:16:57,511 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 22:16:57,511 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-31 22:16:57,511 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-31 22:16:57,511 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-31 22:16:57,511 INFO L130 BoogieDeclarations]: Found specification of procedure thread0 [2023-08-31 22:16:57,512 INFO L138 BoogieDeclarations]: Found implementation of procedure thread0 [2023-08-31 22:16:57,512 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-31 22:16:57,512 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-31 22:16:57,512 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-31 22:16:57,512 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-31 22:16:57,513 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-31 22:16:57,513 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-31 22:16:57,513 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-31 22:16:57,514 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 22:16:57,514 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 22:16:57,514 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 22:16:57,515 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-31 22:16:57,687 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 22:16:57,688 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 22:16:58,081 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 22:16:58,087 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 22:16:58,089 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-08-31 22:16:58,091 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 10:16:58 BoogieIcfgContainer [2023-08-31 22:16:58,100 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 22:16:58,102 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 22:16:58,102 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 22:16:58,104 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 22:16:58,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 10:16:56" (1/3) ... [2023-08-31 22:16:58,105 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16d1662b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 10:16:58, skipping insertion in model container [2023-08-31 22:16:58,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:16:57" (2/3) ... [2023-08-31 22:16:58,106 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16d1662b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 10:16:58, skipping insertion in model container [2023-08-31 22:16:58,106 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 10:16:58" (3/3) ... [2023-08-31 22:16:58,107 INFO L112 eAbstractionObserver]: Analyzing ICFG singleton_with-uninit-problems.i [2023-08-31 22:16:58,121 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 22:16:58,121 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 34 error locations. [2023-08-31 22:16:58,122 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 22:16:58,303 INFO L144 ThreadInstanceAdder]: Constructed 21 joinOtherThreadTransitions. [2023-08-31 22:16:58,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 261 places, 252 transitions, 611 flow [2023-08-31 22:16:58,424 INFO L130 PetriNetUnfolder]: 7/173 cut-off events. [2023-08-31 22:16:58,424 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-31 22:16:58,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 203 conditions, 173 events. 7/173 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 188 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 146. Up to 3 conditions per place. [2023-08-31 22:16:58,429 INFO L82 GeneralOperation]: Start removeDead. Operand has 261 places, 252 transitions, 611 flow [2023-08-31 22:16:58,440 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 181 places, 169 transitions, 389 flow [2023-08-31 22:16:58,444 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:16:58,455 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 181 places, 169 transitions, 389 flow [2023-08-31 22:16:58,459 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 181 places, 169 transitions, 389 flow [2023-08-31 22:16:58,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 181 places, 169 transitions, 389 flow [2023-08-31 22:16:58,520 INFO L130 PetriNetUnfolder]: 7/169 cut-off events. [2023-08-31 22:16:58,520 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-31 22:16:58,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 199 conditions, 169 events. 7/169 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 184 event pairs, 0 based on Foata normal form. 0/125 useless extension candidates. Maximal degree in co-relation 143. Up to 3 conditions per place. [2023-08-31 22:16:58,524 INFO L119 LiptonReduction]: Number of co-enabled transitions 2920 [2023-08-31 22:17:07,748 INFO L134 LiptonReduction]: Checked pairs total: 6789 [2023-08-31 22:17:07,748 INFO L136 LiptonReduction]: Total number of compositions: 141 [2023-08-31 22:17:07,760 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 22:17:07,765 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=All, 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;@6f04ccff, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:17:07,765 INFO L358 AbstractCegarLoop]: Starting to check reachability of 73 error locations. [2023-08-31 22:17:07,767 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2023-08-31 22:17:07,767 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 22:17:07,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:17:07,768 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-31 22:17:07,768 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-08-31 22:17:07,772 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:17:07,772 INFO L85 PathProgramCache]: Analyzing trace with hash 647, now seen corresponding path program 1 times [2023-08-31 22:17:07,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:17:07,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1253811626] [2023-08-31 22:17:07,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:17:07,782 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:17:07,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:17:07,789 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-31 22:17:07,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-08-31 22:17:07,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:17:07,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 3 conjuncts, 1 conjunts are in the unsatisfiable core [2023-08-31 22:17:07,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:17:07,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:17:07,866 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 22:17:07,866 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:17:07,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1253811626] [2023-08-31 22:17:07,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1253811626] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:17:07,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:17:07,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-31 22:17:07,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973374577] [2023-08-31 22:17:07,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:17:07,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-31 22:17:07,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:17:07,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-31 22:17:07,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-31 22:17:07,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 395 [2023-08-31 22:17:07,908 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 87 transitions, 225 flow. Second operand has 2 states, 2 states have (on average 221.5) internal successors, (443), 2 states have internal predecessors, (443), 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) [2023-08-31 22:17:07,909 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:17:07,909 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 395 [2023-08-31 22:17:07,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:17:10,628 INFO L130 PetriNetUnfolder]: 19442/26684 cut-off events. [2023-08-31 22:17:10,628 INFO L131 PetriNetUnfolder]: For 721/721 co-relation queries the response was YES. [2023-08-31 22:17:10,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53387 conditions, 26684 events. 19442/26684 cut-off events. For 721/721 co-relation queries the response was YES. Maximal size of possible extension queue 1699. Compared 145360 event pairs, 19098 based on Foata normal form. 0/9507 useless extension candidates. Maximal degree in co-relation 53362. Up to 25317 conditions per place. [2023-08-31 22:17:10,922 INFO L137 encePairwiseOnDemand]: 391/395 looper letters, 65 selfloop transitions, 0 changer transitions 0/83 dead transitions. [2023-08-31 22:17:10,922 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 83 transitions, 347 flow [2023-08-31 22:17:10,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-31 22:17:10,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-31 22:17:10,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 511 transitions. [2023-08-31 22:17:10,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6468354430379747 [2023-08-31 22:17:10,946 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 511 transitions. [2023-08-31 22:17:10,948 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 511 transitions. [2023-08-31 22:17:10,951 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:17:10,954 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 511 transitions. [2023-08-31 22:17:10,959 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 255.5) internal successors, (511), 2 states have internal predecessors, (511), 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) [2023-08-31 22:17:10,965 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 395.0) internal successors, (1185), 3 states have internal predecessors, (1185), 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) [2023-08-31 22:17:10,966 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 395.0) internal successors, (1185), 3 states have internal predecessors, (1185), 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) [2023-08-31 22:17:10,967 INFO L175 Difference]: Start difference. First operand has 101 places, 87 transitions, 225 flow. Second operand 2 states and 511 transitions. [2023-08-31 22:17:10,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 83 transitions, 347 flow [2023-08-31 22:17:11,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 83 transitions, 313 flow, removed 0 selfloop flow, removed 12 redundant places. [2023-08-31 22:17:11,036 INFO L231 Difference]: Finished difference. Result has 86 places, 83 transitions, 183 flow [2023-08-31 22:17:11,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, PETRI_DIFFERENCE_MINUEND_FLOW=183, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=183, PETRI_PLACES=86, PETRI_TRANSITIONS=83} [2023-08-31 22:17:11,044 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -15 predicate places. [2023-08-31 22:17:11,044 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 83 transitions, 183 flow [2023-08-31 22:17:11,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 221.5) internal successors, (443), 2 states have internal predecessors, (443), 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) [2023-08-31 22:17:11,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:17:11,045 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-31 22:17:11,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-08-31 22:17:11,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:17:11,262 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-08-31 22:17:11,262 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:17:11,263 INFO L85 PathProgramCache]: Analyzing trace with hash 637139, now seen corresponding path program 1 times [2023-08-31 22:17:11,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:17:11,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [576214670] [2023-08-31 22:17:11,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:17:11,264 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:17:11,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:17:11,265 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-31 22:17:11,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-08-31 22:17:11,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:17:11,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-31 22:17:11,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:17:11,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 22:17:11,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:17:11,395 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 22:17:11,395 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:17:11,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [576214670] [2023-08-31 22:17:11,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [576214670] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:17:11,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:17:11,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-31 22:17:11,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107998543] [2023-08-31 22:17:11,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:17:11,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:17:11,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:17:11,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:17:11,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:17:11,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 395 [2023-08-31 22:17:11,694 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 83 transitions, 183 flow. Second operand has 3 states, 3 states have (on average 216.0) internal successors, (648), 3 states have internal predecessors, (648), 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) [2023-08-31 22:17:11,694 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:17:11,694 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 395 [2023-08-31 22:17:11,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:17:13,507 INFO L130 PetriNetUnfolder]: 19430/26659 cut-off events. [2023-08-31 22:17:13,507 INFO L131 PetriNetUnfolder]: For 85/85 co-relation queries the response was YES. [2023-08-31 22:17:13,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52301 conditions, 26659 events. 19430/26659 cut-off events. For 85/85 co-relation queries the response was YES. Maximal size of possible extension queue 1699. Compared 145257 event pairs, 16158 based on Foata normal form. 0/9495 useless extension candidates. Maximal degree in co-relation 52298. Up to 25252 conditions per place. [2023-08-31 22:17:13,665 INFO L137 encePairwiseOnDemand]: 392/395 looper letters, 68 selfloop transitions, 2 changer transitions 0/88 dead transitions. [2023-08-31 22:17:13,665 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 88 transitions, 333 flow [2023-08-31 22:17:13,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:17:13,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:17:13,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 716 transitions. [2023-08-31 22:17:13,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6042194092827005 [2023-08-31 22:17:13,668 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 716 transitions. [2023-08-31 22:17:13,669 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 716 transitions. [2023-08-31 22:17:13,669 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:17:13,669 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 716 transitions. [2023-08-31 22:17:13,671 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 238.66666666666666) internal successors, (716), 3 states have internal predecessors, (716), 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) [2023-08-31 22:17:13,673 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 395.0) internal successors, (1580), 4 states have internal predecessors, (1580), 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) [2023-08-31 22:17:13,674 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 395.0) internal successors, (1580), 4 states have internal predecessors, (1580), 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) [2023-08-31 22:17:13,674 INFO L175 Difference]: Start difference. First operand has 86 places, 83 transitions, 183 flow. Second operand 3 states and 716 transitions. [2023-08-31 22:17:13,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 88 transitions, 333 flow [2023-08-31 22:17:13,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 88 transitions, 333 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 22:17:13,677 INFO L231 Difference]: Finished difference. Result has 89 places, 83 transitions, 191 flow [2023-08-31 22:17:13,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, PETRI_DIFFERENCE_MINUEND_FLOW=183, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=191, PETRI_PLACES=89, PETRI_TRANSITIONS=83} [2023-08-31 22:17:13,679 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -12 predicate places. [2023-08-31 22:17:13,679 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 83 transitions, 191 flow [2023-08-31 22:17:13,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 216.0) internal successors, (648), 3 states have internal predecessors, (648), 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) [2023-08-31 22:17:13,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:17:13,680 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-31 22:17:13,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-08-31 22:17:13,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:17:13,891 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-08-31 22:17:13,891 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:17:13,891 INFO L85 PathProgramCache]: Analyzing trace with hash 637138, now seen corresponding path program 1 times [2023-08-31 22:17:13,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:17:13,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1765651593] [2023-08-31 22:17:13,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:17:13,892 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:17:13,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:17:13,894 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-31 22:17:13,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-08-31 22:17:13,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:17:13,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-31 22:17:13,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:17:13,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-31 22:17:13,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:17:13,983 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 22:17:13,983 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:17:13,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1765651593] [2023-08-31 22:17:13,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1765651593] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:17:13,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:17:13,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-31 22:17:13,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062823] [2023-08-31 22:17:13,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:17:13,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:17:13,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:17:13,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:17:13,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:17:14,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 395 [2023-08-31 22:17:14,187 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 83 transitions, 191 flow. Second operand has 3 states, 3 states have (on average 204.0) internal successors, (612), 3 states have internal predecessors, (612), 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) [2023-08-31 22:17:14,187 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:17:14,187 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 395 [2023-08-31 22:17:14,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:17:15,449 INFO L130 PetriNetUnfolder]: 14207/19641 cut-off events. [2023-08-31 22:17:15,449 INFO L131 PetriNetUnfolder]: For 1527/1527 co-relation queries the response was YES. [2023-08-31 22:17:15,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39998 conditions, 19641 events. 14207/19641 cut-off events. For 1527/1527 co-relation queries the response was YES. Maximal size of possible extension queue 1284. Compared 104182 event pairs, 13939 based on Foata normal form. 0/8954 useless extension candidates. Maximal degree in co-relation 39993. Up to 18580 conditions per place. [2023-08-31 22:17:15,555 INFO L137 encePairwiseOnDemand]: 386/395 looper letters, 68 selfloop transitions, 8 changer transitions 0/94 dead transitions. [2023-08-31 22:17:15,555 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 94 transitions, 368 flow [2023-08-31 22:17:15,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:17:15,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:17:15,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 686 transitions. [2023-08-31 22:17:15,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5789029535864979 [2023-08-31 22:17:15,558 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 686 transitions. [2023-08-31 22:17:15,558 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 686 transitions. [2023-08-31 22:17:15,559 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:17:15,559 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 686 transitions. [2023-08-31 22:17:15,560 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 228.66666666666666) internal successors, (686), 3 states have internal predecessors, (686), 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) [2023-08-31 22:17:15,562 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 395.0) internal successors, (1580), 4 states have internal predecessors, (1580), 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) [2023-08-31 22:17:15,563 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 395.0) internal successors, (1580), 4 states have internal predecessors, (1580), 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) [2023-08-31 22:17:15,563 INFO L175 Difference]: Start difference. First operand has 89 places, 83 transitions, 191 flow. Second operand 3 states and 686 transitions. [2023-08-31 22:17:15,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 94 transitions, 368 flow [2023-08-31 22:17:15,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 94 transitions, 364 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 22:17:15,566 INFO L231 Difference]: Finished difference. Result has 91 places, 89 transitions, 245 flow [2023-08-31 22:17:15,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=245, PETRI_PLACES=91, PETRI_TRANSITIONS=89} [2023-08-31 22:17:15,567 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -10 predicate places. [2023-08-31 22:17:15,567 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 89 transitions, 245 flow [2023-08-31 22:17:15,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 204.0) internal successors, (612), 3 states have internal predecessors, (612), 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) [2023-08-31 22:17:15,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:17:15,568 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:17:15,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-08-31 22:17:15,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:17:15,777 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-08-31 22:17:15,777 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:17:15,777 INFO L85 PathProgramCache]: Analyzing trace with hash -64964974, now seen corresponding path program 1 times [2023-08-31 22:17:15,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:17:15,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1153749735] [2023-08-31 22:17:15,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:17:15,778 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:17:15,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:17:15,779 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-31 22:17:15,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-08-31 22:17:15,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:17:15,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-31 22:17:15,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:17:15,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-31 22:17:15,903 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-31 22:17:15,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-31 22:17:15,984 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2023-08-31 22:17:15,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2023-08-31 22:17:16,117 INFO L321 Elim1Store]: treesize reduction 66, result has 34.0 percent of original size [2023-08-31 22:17:16,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 59 [2023-08-31 22:17:16,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:17:16,162 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 22:17:16,162 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:17:16,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1153749735] [2023-08-31 22:17:16,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1153749735] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:17:16,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:17:16,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 22:17:16,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431991266] [2023-08-31 22:17:16,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:17:16,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 22:17:16,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:17:16,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 22:17:16,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-31 22:17:16,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 395 [2023-08-31 22:17:16,959 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 89 transitions, 245 flow. Second operand has 5 states, 5 states have (on average 197.4) internal successors, (987), 5 states have internal predecessors, (987), 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) [2023-08-31 22:17:16,959 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:17:16,959 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 395 [2023-08-31 22:17:16,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:17:18,045 INFO L130 PetriNetUnfolder]: 14205/19632 cut-off events. [2023-08-31 22:17:18,045 INFO L131 PetriNetUnfolder]: For 2994/2994 co-relation queries the response was YES. [2023-08-31 22:17:18,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41490 conditions, 19632 events. 14205/19632 cut-off events. For 2994/2994 co-relation queries the response was YES. Maximal size of possible extension queue 1284. Compared 104144 event pairs, 12475 based on Foata normal form. 0/8959 useless extension candidates. Maximal degree in co-relation 41484. Up to 18561 conditions per place. [2023-08-31 22:17:18,145 INFO L137 encePairwiseOnDemand]: 389/395 looper letters, 73 selfloop transitions, 4 changer transitions 0/91 dead transitions. [2023-08-31 22:17:18,145 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 91 transitions, 411 flow [2023-08-31 22:17:18,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 22:17:18,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 22:17:18,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1053 transitions. [2023-08-31 22:17:18,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5331645569620254 [2023-08-31 22:17:18,151 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1053 transitions. [2023-08-31 22:17:18,151 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1053 transitions. [2023-08-31 22:17:18,153 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:17:18,153 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1053 transitions. [2023-08-31 22:17:18,156 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 210.6) internal successors, (1053), 5 states have internal predecessors, (1053), 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) [2023-08-31 22:17:18,160 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 395.0) internal successors, (2370), 6 states have internal predecessors, (2370), 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) [2023-08-31 22:17:18,161 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 395.0) internal successors, (2370), 6 states have internal predecessors, (2370), 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) [2023-08-31 22:17:18,161 INFO L175 Difference]: Start difference. First operand has 91 places, 89 transitions, 245 flow. Second operand 5 states and 1053 transitions. [2023-08-31 22:17:18,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 91 transitions, 411 flow [2023-08-31 22:17:18,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 91 transitions, 395 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 22:17:18,168 INFO L231 Difference]: Finished difference. Result has 91 places, 87 transitions, 233 flow [2023-08-31 22:17:18,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=233, PETRI_PLACES=91, PETRI_TRANSITIONS=87} [2023-08-31 22:17:18,170 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -10 predicate places. [2023-08-31 22:17:18,170 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 87 transitions, 233 flow [2023-08-31 22:17:18,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 197.4) internal successors, (987), 5 states have internal predecessors, (987), 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) [2023-08-31 22:17:18,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:17:18,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:17:18,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-08-31 22:17:18,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:17:18,381 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-08-31 22:17:18,381 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:17:18,381 INFO L85 PathProgramCache]: Analyzing trace with hash -64964973, now seen corresponding path program 1 times [2023-08-31 22:17:18,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:17:18,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [125528879] [2023-08-31 22:17:18,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:17:18,382 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:17:18,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:17:18,383 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-31 22:17:18,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-08-31 22:17:18,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:17:18,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-31 22:17:18,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:17:18,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-31 22:17:18,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 22:17:18,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 22:17:18,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 14 [2023-08-31 22:17:18,545 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-31 22:17:18,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-31 22:17:18,641 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2023-08-31 22:17:18,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2023-08-31 22:17:18,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-31 22:17:18,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 22:17:18,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 22:17:18,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2023-08-31 22:17:18,816 INFO L321 Elim1Store]: treesize reduction 18, result has 41.9 percent of original size [2023-08-31 22:17:18,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 31 [2023-08-31 22:17:18,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:17:18,848 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 22:17:18,848 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:17:18,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [125528879] [2023-08-31 22:17:18,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [125528879] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:17:18,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:17:18,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 22:17:18,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027761536] [2023-08-31 22:17:18,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:17:18,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-31 22:17:18,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:17:18,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-31 22:17:18,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-31 22:17:19,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 395 [2023-08-31 22:17:19,682 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 87 transitions, 233 flow. Second operand has 6 states, 6 states have (on average 193.16666666666666) internal successors, (1159), 6 states have internal predecessors, (1159), 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) [2023-08-31 22:17:19,682 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:17:19,682 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 395 [2023-08-31 22:17:19,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:17:21,018 INFO L130 PetriNetUnfolder]: 14199/19619 cut-off events. [2023-08-31 22:17:21,018 INFO L131 PetriNetUnfolder]: For 2987/2987 co-relation queries the response was YES. [2023-08-31 22:17:21,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41453 conditions, 19619 events. 14199/19619 cut-off events. For 2987/2987 co-relation queries the response was YES. Maximal size of possible extension queue 1284. Compared 104122 event pairs, 12468 based on Foata normal form. 0/8948 useless extension candidates. Maximal degree in co-relation 41447. Up to 18548 conditions per place. [2023-08-31 22:17:21,104 INFO L137 encePairwiseOnDemand]: 388/395 looper letters, 72 selfloop transitions, 6 changer transitions 0/92 dead transitions. [2023-08-31 22:17:21,104 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 92 transitions, 413 flow [2023-08-31 22:17:21,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 22:17:21,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 22:17:21,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1226 transitions. [2023-08-31 22:17:21,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5172995780590718 [2023-08-31 22:17:21,107 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1226 transitions. [2023-08-31 22:17:21,107 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1226 transitions. [2023-08-31 22:17:21,108 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:17:21,108 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1226 transitions. [2023-08-31 22:17:21,111 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 204.33333333333334) internal successors, (1226), 6 states have internal predecessors, (1226), 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) [2023-08-31 22:17:21,115 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 395.0) internal successors, (2765), 7 states have internal predecessors, (2765), 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) [2023-08-31 22:17:21,116 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 395.0) internal successors, (2765), 7 states have internal predecessors, (2765), 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) [2023-08-31 22:17:21,116 INFO L175 Difference]: Start difference. First operand has 91 places, 87 transitions, 233 flow. Second operand 6 states and 1226 transitions. [2023-08-31 22:17:21,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 92 transitions, 413 flow [2023-08-31 22:17:21,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 92 transitions, 405 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-31 22:17:21,121 INFO L231 Difference]: Finished difference. Result has 90 places, 85 transitions, 233 flow [2023-08-31 22:17:21,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=233, PETRI_PLACES=90, PETRI_TRANSITIONS=85} [2023-08-31 22:17:21,122 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -11 predicate places. [2023-08-31 22:17:21,122 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 85 transitions, 233 flow [2023-08-31 22:17:21,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 193.16666666666666) internal successors, (1159), 6 states have internal predecessors, (1159), 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) [2023-08-31 22:17:21,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:17:21,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:17:21,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-08-31 22:17:21,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:17:21,326 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-08-31 22:17:21,328 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:17:21,328 INFO L85 PathProgramCache]: Analyzing trace with hash -153582422, now seen corresponding path program 1 times [2023-08-31 22:17:21,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:17:21,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1447024441] [2023-08-31 22:17:21,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:17:21,331 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:17:21,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:17:21,332 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-31 22:17:21,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-08-31 22:17:21,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:17:21,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-31 22:17:21,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:17:21,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-31 22:17:21,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 22:17:21,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 22:17:21,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 14 [2023-08-31 22:17:21,613 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-31 22:17:21,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-31 22:17:21,717 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2023-08-31 22:17:21,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2023-08-31 22:17:21,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-31 22:17:21,809 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2023-08-31 22:17:21,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2023-08-31 22:17:21,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-31 22:17:21,875 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-08-31 22:17:21,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 12 treesize of output 14 [2023-08-31 22:17:21,914 INFO L321 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2023-08-31 22:17:21,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 32 [2023-08-31 22:17:21,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 22:17:21,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-31 22:17:21,999 INFO L321 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2023-08-31 22:17:22,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2023-08-31 22:17:22,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 22:17:22,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-31 22:17:22,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:17:22,162 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 22:17:22,162 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:17:22,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1447024441] [2023-08-31 22:17:22,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1447024441] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:17:22,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:17:22,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 22:17:22,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963302822] [2023-08-31 22:17:22,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:17:22,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-31 22:17:22,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:17:22,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-31 22:17:22,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-31 22:17:24,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 395 [2023-08-31 22:17:24,722 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 85 transitions, 233 flow. Second operand has 6 states, 6 states have (on average 191.66666666666666) internal successors, (1150), 6 states have internal predecessors, (1150), 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) [2023-08-31 22:17:24,722 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:17:24,722 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 395 [2023-08-31 22:17:24,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:17:25,880 INFO L130 PetriNetUnfolder]: 8985/12611 cut-off events. [2023-08-31 22:17:25,881 INFO L131 PetriNetUnfolder]: For 2963/2963 co-relation queries the response was YES. [2023-08-31 22:17:25,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26229 conditions, 12611 events. 8985/12611 cut-off events. For 2963/2963 co-relation queries the response was YES. Maximal size of possible extension queue 869. Compared 64799 event pairs, 7350 based on Foata normal form. 1456/6950 useless extension candidates. Maximal degree in co-relation 26223. Up to 11892 conditions per place. [2023-08-31 22:17:25,929 INFO L137 encePairwiseOnDemand]: 385/395 looper letters, 64 selfloop transitions, 10 changer transitions 0/89 dead transitions. [2023-08-31 22:17:25,930 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 89 transitions, 390 flow [2023-08-31 22:17:25,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 22:17:25,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 22:17:25,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1216 transitions. [2023-08-31 22:17:25,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5130801687763713 [2023-08-31 22:17:25,935 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1216 transitions. [2023-08-31 22:17:25,939 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1216 transitions. [2023-08-31 22:17:25,949 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:17:25,950 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1216 transitions. [2023-08-31 22:17:25,952 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 202.66666666666666) internal successors, (1216), 6 states have internal predecessors, (1216), 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) [2023-08-31 22:17:25,955 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 395.0) internal successors, (2765), 7 states have internal predecessors, (2765), 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) [2023-08-31 22:17:25,955 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 395.0) internal successors, (2765), 7 states have internal predecessors, (2765), 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) [2023-08-31 22:17:25,956 INFO L175 Difference]: Start difference. First operand has 90 places, 85 transitions, 233 flow. Second operand 6 states and 1216 transitions. [2023-08-31 22:17:25,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 89 transitions, 390 flow [2023-08-31 22:17:25,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 89 transitions, 376 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-31 22:17:25,958 INFO L231 Difference]: Finished difference. Result has 88 places, 84 transitions, 235 flow [2023-08-31 22:17:25,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=235, PETRI_PLACES=88, PETRI_TRANSITIONS=84} [2023-08-31 22:17:25,959 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -13 predicate places. [2023-08-31 22:17:25,959 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 84 transitions, 235 flow [2023-08-31 22:17:25,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 191.66666666666666) internal successors, (1150), 6 states have internal predecessors, (1150), 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) [2023-08-31 22:17:25,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:17:25,960 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:17:25,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-08-31 22:17:26,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:17:26,170 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread0Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-08-31 22:17:26,170 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:17:26,170 INFO L85 PathProgramCache]: Analyzing trace with hash -1256894222, now seen corresponding path program 1 times [2023-08-31 22:17:26,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:17:26,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [117946489] [2023-08-31 22:17:26,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:17:26,171 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:17:26,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:17:26,172 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-31 22:17:26,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-08-31 22:17:26,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:17:26,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-31 22:17:26,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:17:26,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-31 22:17:26,296 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-31 22:17:26,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-31 22:17:26,360 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-31 22:17:26,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-31 22:17:26,384 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-31 22:17:26,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-31 22:17:26,406 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-31 22:17:26,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-31 22:17:26,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:17:26,416 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 22:17:26,417 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:17:26,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [117946489] [2023-08-31 22:17:26,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [117946489] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:17:26,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:17:26,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 22:17:26,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754880863] [2023-08-31 22:17:26,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:17:26,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:17:26,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:17:26,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:17:26,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:17:26,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 395 [2023-08-31 22:17:26,571 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 84 transitions, 235 flow. Second operand has 3 states, 3 states have (on average 207.33333333333334) internal successors, (622), 3 states have internal predecessors, (622), 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) [2023-08-31 22:17:26,571 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:17:26,571 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 395 [2023-08-31 22:17:26,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:17:27,235 INFO L130 PetriNetUnfolder]: 7190/10302 cut-off events. [2023-08-31 22:17:27,235 INFO L131 PetriNetUnfolder]: For 1254/1254 co-relation queries the response was YES. [2023-08-31 22:17:27,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21347 conditions, 10302 events. 7190/10302 cut-off events. For 1254/1254 co-relation queries the response was YES. Maximal size of possible extension queue 649. Compared 52737 event pairs, 5815 based on Foata normal form. 0/4728 useless extension candidates. Maximal degree in co-relation 21342. Up to 9576 conditions per place. [2023-08-31 22:17:27,277 INFO L137 encePairwiseOnDemand]: 391/395 looper letters, 64 selfloop transitions, 2 changer transitions 0/83 dead transitions. [2023-08-31 22:17:27,277 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 83 transitions, 367 flow [2023-08-31 22:17:27,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:17:27,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:17:27,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 674 transitions. [2023-08-31 22:17:27,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5687763713080168 [2023-08-31 22:17:27,280 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 674 transitions. [2023-08-31 22:17:27,280 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 674 transitions. [2023-08-31 22:17:27,280 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:17:27,280 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 674 transitions. [2023-08-31 22:17:27,282 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 224.66666666666666) internal successors, (674), 3 states have internal predecessors, (674), 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) [2023-08-31 22:17:27,284 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 395.0) internal successors, (1580), 4 states have internal predecessors, (1580), 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) [2023-08-31 22:17:27,284 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 395.0) internal successors, (1580), 4 states have internal predecessors, (1580), 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) [2023-08-31 22:17:27,284 INFO L175 Difference]: Start difference. First operand has 88 places, 84 transitions, 235 flow. Second operand 3 states and 674 transitions. [2023-08-31 22:17:27,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 83 transitions, 367 flow [2023-08-31 22:17:27,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 83 transitions, 360 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-31 22:17:27,286 INFO L231 Difference]: Finished difference. Result has 85 places, 82 transitions, 228 flow [2023-08-31 22:17:27,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=228, PETRI_PLACES=85, PETRI_TRANSITIONS=82} [2023-08-31 22:17:27,287 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -16 predicate places. [2023-08-31 22:17:27,287 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 82 transitions, 228 flow [2023-08-31 22:17:27,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 207.33333333333334) internal successors, (622), 3 states have internal predecessors, (622), 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) [2023-08-31 22:17:27,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:17:27,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:17:27,297 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2023-08-31 22:17:27,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:17:27,497 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread0Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-08-31 22:17:27,497 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:17:27,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1256894221, now seen corresponding path program 1 times [2023-08-31 22:17:27,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:17:27,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1041079908] [2023-08-31 22:17:27,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:17:27,498 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:17:27,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:17:27,499 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-31 22:17:27,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-08-31 22:17:27,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:17:27,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-31 22:17:27,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:17:27,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-31 22:17:27,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 22:17:27,682 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-31 22:17:27,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-31 22:17:27,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 14 [2023-08-31 22:17:27,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 22:17:27,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 14 [2023-08-31 22:17:27,743 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-31 22:17:27,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-31 22:17:27,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 22:17:27,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 14 [2023-08-31 22:17:27,795 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-31 22:17:27,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-31 22:17:27,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 22:17:27,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 14 [2023-08-31 22:17:27,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:17:27,904 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 22:17:27,904 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:17:27,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1041079908] [2023-08-31 22:17:27,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1041079908] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:17:27,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:17:27,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 22:17:27,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684557094] [2023-08-31 22:17:27,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:17:27,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-31 22:17:27,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:17:27,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-31 22:17:27,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-08-31 22:17:28,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 395 [2023-08-31 22:17:28,626 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 82 transitions, 228 flow. Second operand has 6 states, 6 states have (on average 201.66666666666666) internal successors, (1210), 6 states have internal predecessors, (1210), 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) [2023-08-31 22:17:28,626 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:17:28,626 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 395 [2023-08-31 22:17:28,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:17:29,204 INFO L130 PetriNetUnfolder]: 5397/7995 cut-off events. [2023-08-31 22:17:29,204 INFO L131 PetriNetUnfolder]: For 996/996 co-relation queries the response was YES. [2023-08-31 22:17:29,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16475 conditions, 7995 events. 5397/7995 cut-off events. For 996/996 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 41505 event pairs, 4276 based on Foata normal form. 0/3959 useless extension candidates. Maximal degree in co-relation 16470. Up to 7269 conditions per place. [2023-08-31 22:17:29,235 INFO L137 encePairwiseOnDemand]: 389/395 looper letters, 61 selfloop transitions, 5 changer transitions 0/83 dead transitions. [2023-08-31 22:17:29,235 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 83 transitions, 370 flow [2023-08-31 22:17:29,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 22:17:29,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 22:17:29,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1062 transitions. [2023-08-31 22:17:29,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5377215189873418 [2023-08-31 22:17:29,239 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1062 transitions. [2023-08-31 22:17:29,239 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1062 transitions. [2023-08-31 22:17:29,240 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:17:29,240 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1062 transitions. [2023-08-31 22:17:29,242 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 212.4) internal successors, (1062), 5 states have internal predecessors, (1062), 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) [2023-08-31 22:17:29,244 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 395.0) internal successors, (2370), 6 states have internal predecessors, (2370), 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) [2023-08-31 22:17:29,245 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 395.0) internal successors, (2370), 6 states have internal predecessors, (2370), 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) [2023-08-31 22:17:29,245 INFO L175 Difference]: Start difference. First operand has 85 places, 82 transitions, 228 flow. Second operand 5 states and 1062 transitions. [2023-08-31 22:17:29,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 83 transitions, 370 flow [2023-08-31 22:17:29,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 83 transitions, 366 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 22:17:29,249 INFO L231 Difference]: Finished difference. Result has 85 places, 80 transitions, 230 flow [2023-08-31 22:17:29,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=230, PETRI_PLACES=85, PETRI_TRANSITIONS=80} [2023-08-31 22:17:29,249 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -16 predicate places. [2023-08-31 22:17:29,250 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 80 transitions, 230 flow [2023-08-31 22:17:29,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 201.66666666666666) internal successors, (1210), 6 states have internal predecessors, (1210), 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) [2023-08-31 22:17:29,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:17:29,251 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:17:29,268 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2023-08-31 22:17:29,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:17:29,460 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread0Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-08-31 22:17:29,460 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:17:29,460 INFO L85 PathProgramCache]: Analyzing trace with hash -989523521, now seen corresponding path program 1 times [2023-08-31 22:17:29,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:17:29,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1290307251] [2023-08-31 22:17:29,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:17:29,461 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:17:29,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:17:29,462 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-31 22:17:29,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-08-31 22:17:29,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:17:29,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-31 22:17:29,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:17:29,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-31 22:17:29,595 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-31 22:17:29,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-31 22:17:29,617 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-31 22:17:29,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-31 22:17:29,634 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-31 22:17:29,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-31 22:17:29,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:17:29,646 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 22:17:29,646 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:17:29,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1290307251] [2023-08-31 22:17:29,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1290307251] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:17:29,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:17:29,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 22:17:29,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517795124] [2023-08-31 22:17:29,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:17:29,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:17:29,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:17:29,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:17:29,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:17:29,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 395 [2023-08-31 22:17:29,801 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 80 transitions, 230 flow. Second operand has 3 states, 3 states have (on average 208.0) internal successors, (624), 3 states have internal predecessors, (624), 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) [2023-08-31 22:17:29,801 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:17:29,801 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 395 [2023-08-31 22:17:29,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:17:30,328 INFO L130 PetriNetUnfolder]: 5739/8201 cut-off events. [2023-08-31 22:17:30,328 INFO L131 PetriNetUnfolder]: For 1025/1025 co-relation queries the response was YES. [2023-08-31 22:17:30,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17208 conditions, 8201 events. 5739/8201 cut-off events. For 1025/1025 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 39697 event pairs, 4561 based on Foata normal form. 0/4241 useless extension candidates. Maximal degree in co-relation 17203. Up to 7731 conditions per place. [2023-08-31 22:17:30,359 INFO L137 encePairwiseOnDemand]: 391/395 looper letters, 62 selfloop transitions, 2 changer transitions 0/79 dead transitions. [2023-08-31 22:17:30,360 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 79 transitions, 358 flow [2023-08-31 22:17:30,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:17:30,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:17:30,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 672 transitions. [2023-08-31 22:17:30,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5670886075949367 [2023-08-31 22:17:30,363 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 672 transitions. [2023-08-31 22:17:30,363 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 672 transitions. [2023-08-31 22:17:30,363 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:17:30,363 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 672 transitions. [2023-08-31 22:17:30,365 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 224.0) internal successors, (672), 3 states have internal predecessors, (672), 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) [2023-08-31 22:17:30,366 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 395.0) internal successors, (1580), 4 states have internal predecessors, (1580), 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) [2023-08-31 22:17:30,367 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 395.0) internal successors, (1580), 4 states have internal predecessors, (1580), 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) [2023-08-31 22:17:30,367 INFO L175 Difference]: Start difference. First operand has 85 places, 80 transitions, 230 flow. Second operand 3 states and 672 transitions. [2023-08-31 22:17:30,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 79 transitions, 358 flow [2023-08-31 22:17:30,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 79 transitions, 348 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-31 22:17:30,370 INFO L231 Difference]: Finished difference. Result has 81 places, 78 transitions, 220 flow [2023-08-31 22:17:30,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=220, PETRI_PLACES=81, PETRI_TRANSITIONS=78} [2023-08-31 22:17:30,371 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -20 predicate places. [2023-08-31 22:17:30,371 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 78 transitions, 220 flow [2023-08-31 22:17:30,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 208.0) internal successors, (624), 3 states have internal predecessors, (624), 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) [2023-08-31 22:17:30,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:17:30,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:17:30,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-08-31 22:17:30,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:17:30,581 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread0Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-08-31 22:17:30,582 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:17:30,582 INFO L85 PathProgramCache]: Analyzing trace with hash -989523523, now seen corresponding path program 1 times [2023-08-31 22:17:30,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:17:30,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [145639460] [2023-08-31 22:17:30,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:17:30,582 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:17:30,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:17:30,583 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-31 22:17:30,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-08-31 22:17:30,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:17:30,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-31 22:17:30,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:17:30,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 22:17:30,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-31 22:17:30,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 22:17:30,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 14 [2023-08-31 22:17:30,760 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-31 22:17:30,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-31 22:17:30,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 22:17:30,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-31 22:17:30,847 INFO L321 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2023-08-31 22:17:30,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2023-08-31 22:17:30,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 22:17:30,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 14 [2023-08-31 22:17:30,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:17:30,960 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 22:17:30,960 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:17:30,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [145639460] [2023-08-31 22:17:30,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [145639460] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:17:30,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:17:30,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 22:17:30,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987254703] [2023-08-31 22:17:30,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:17:30,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-31 22:17:30,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:17:30,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-31 22:17:30,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-31 22:17:31,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 395 [2023-08-31 22:17:31,975 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 78 transitions, 220 flow. Second operand has 6 states, 6 states have (on average 193.33333333333334) internal successors, (1160), 6 states have internal predecessors, (1160), 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) [2023-08-31 22:17:31,976 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:17:31,976 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 395 [2023-08-31 22:17:31,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:17:32,697 INFO L130 PetriNetUnfolder]: 5731/8057 cut-off events. [2023-08-31 22:17:32,697 INFO L131 PetriNetUnfolder]: For 1022/1022 co-relation queries the response was YES. [2023-08-31 22:17:32,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17045 conditions, 8057 events. 5731/8057 cut-off events. For 1022/1022 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 37637 event pairs, 4552 based on Foata normal form. 0/4109 useless extension candidates. Maximal degree in co-relation 17040. Up to 7701 conditions per place. [2023-08-31 22:17:32,726 INFO L137 encePairwiseOnDemand]: 388/395 looper letters, 64 selfloop transitions, 6 changer transitions 0/82 dead transitions. [2023-08-31 22:17:32,726 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 82 transitions, 380 flow [2023-08-31 22:17:32,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 22:17:32,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 22:17:32,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1212 transitions. [2023-08-31 22:17:32,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5113924050632911 [2023-08-31 22:17:32,730 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1212 transitions. [2023-08-31 22:17:32,730 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1212 transitions. [2023-08-31 22:17:32,731 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:17:32,731 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1212 transitions. [2023-08-31 22:17:32,733 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 202.0) internal successors, (1212), 6 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:17:32,736 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 395.0) internal successors, (2765), 7 states have internal predecessors, (2765), 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) [2023-08-31 22:17:32,736 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 395.0) internal successors, (2765), 7 states have internal predecessors, (2765), 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) [2023-08-31 22:17:32,736 INFO L175 Difference]: Start difference. First operand has 81 places, 78 transitions, 220 flow. Second operand 6 states and 1212 transitions. [2023-08-31 22:17:32,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 82 transitions, 380 flow [2023-08-31 22:17:32,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 82 transitions, 376 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 22:17:32,740 INFO L231 Difference]: Finished difference. Result has 82 places, 76 transitions, 224 flow [2023-08-31 22:17:32,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=224, PETRI_PLACES=82, PETRI_TRANSITIONS=76} [2023-08-31 22:17:32,741 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -19 predicate places. [2023-08-31 22:17:32,741 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 76 transitions, 224 flow [2023-08-31 22:17:32,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 193.33333333333334) internal successors, (1160), 6 states have internal predecessors, (1160), 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) [2023-08-31 22:17:32,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:17:32,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:17:32,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-08-31 22:17:32,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:17:32,951 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-08-31 22:17:32,951 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:17:32,951 INFO L85 PathProgramCache]: Analyzing trace with hash -989523568, now seen corresponding path program 1 times [2023-08-31 22:17:32,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:17:32,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [224361539] [2023-08-31 22:17:32,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:17:32,952 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:17:32,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:17:32,953 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-31 22:17:32,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-08-31 22:17:33,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:17:33,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-31 22:17:33,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:17:33,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-31 22:17:33,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:17:33,046 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 22:17:33,046 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:17:33,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [224361539] [2023-08-31 22:17:33,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [224361539] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:17:33,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:17:33,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 22:17:33,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690404569] [2023-08-31 22:17:33,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:17:33,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:17:33,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:17:33,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:17:33,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:17:33,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 395 [2023-08-31 22:17:33,202 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 76 transitions, 224 flow. Second operand has 3 states, 3 states have (on average 199.66666666666666) internal successors, (599), 3 states have internal predecessors, (599), 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) [2023-08-31 22:17:33,202 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:17:33,202 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 395 [2023-08-31 22:17:33,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:17:33,468 INFO L130 PetriNetUnfolder]: 1829/2797 cut-off events. [2023-08-31 22:17:33,468 INFO L131 PetriNetUnfolder]: For 401/401 co-relation queries the response was YES. [2023-08-31 22:17:33,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5883 conditions, 2797 events. 1829/2797 cut-off events. For 401/401 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 11912 event pairs, 1384 based on Foata normal form. 0/1751 useless extension candidates. Maximal degree in co-relation 5878. Up to 2530 conditions per place. [2023-08-31 22:17:33,479 INFO L137 encePairwiseOnDemand]: 388/395 looper letters, 55 selfloop transitions, 3 changer transitions 0/74 dead transitions. [2023-08-31 22:17:33,479 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 74 transitions, 338 flow [2023-08-31 22:17:33,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:17:33,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:17:33,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 644 transitions. [2023-08-31 22:17:33,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5434599156118144 [2023-08-31 22:17:33,482 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 644 transitions. [2023-08-31 22:17:33,483 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 644 transitions. [2023-08-31 22:17:33,483 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:17:33,483 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 644 transitions. [2023-08-31 22:17:33,484 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 214.66666666666666) internal successors, (644), 3 states have internal predecessors, (644), 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) [2023-08-31 22:17:33,486 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 395.0) internal successors, (1580), 4 states have internal predecessors, (1580), 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) [2023-08-31 22:17:33,486 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 395.0) internal successors, (1580), 4 states have internal predecessors, (1580), 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) [2023-08-31 22:17:33,487 INFO L175 Difference]: Start difference. First operand has 82 places, 76 transitions, 224 flow. Second operand 3 states and 644 transitions. [2023-08-31 22:17:33,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 74 transitions, 338 flow [2023-08-31 22:17:33,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 74 transitions, 326 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-31 22:17:33,489 INFO L231 Difference]: Finished difference. Result has 75 places, 72 transitions, 210 flow [2023-08-31 22:17:33,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=210, PETRI_PLACES=75, PETRI_TRANSITIONS=72} [2023-08-31 22:17:33,490 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -26 predicate places. [2023-08-31 22:17:33,490 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 72 transitions, 210 flow [2023-08-31 22:17:33,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 199.66666666666666) internal successors, (599), 3 states have internal predecessors, (599), 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) [2023-08-31 22:17:33,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:17:33,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:17:33,502 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2023-08-31 22:17:33,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:17:33,699 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-08-31 22:17:33,700 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:17:33,700 INFO L85 PathProgramCache]: Analyzing trace with hash -989523569, now seen corresponding path program 1 times [2023-08-31 22:17:33,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:17:33,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [647083190] [2023-08-31 22:17:33,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:17:33,700 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:17:33,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:17:33,702 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-31 22:17:33,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-08-31 22:17:33,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:17:33,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-31 22:17:33,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:17:33,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 22:17:33,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:17:33,824 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 22:17:33,824 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:17:33,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [647083190] [2023-08-31 22:17:33,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [647083190] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:17:33,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:17:33,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 22:17:33,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144591835] [2023-08-31 22:17:33,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:17:33,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:17:33,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:17:33,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:17:33,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:17:34,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 395 [2023-08-31 22:17:34,058 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 72 transitions, 210 flow. Second operand has 3 states, 3 states have (on average 211.66666666666666) internal successors, (635), 3 states have internal predecessors, (635), 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) [2023-08-31 22:17:34,058 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:17:34,058 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 395 [2023-08-31 22:17:34,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:17:34,183 INFO L130 PetriNetUnfolder]: 417/753 cut-off events. [2023-08-31 22:17:34,183 INFO L131 PetriNetUnfolder]: For 138/138 co-relation queries the response was YES. [2023-08-31 22:17:34,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1619 conditions, 753 events. 417/753 cut-off events. For 138/138 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2459 event pairs, 275 based on Foata normal form. 0/649 useless extension candidates. Maximal degree in co-relation 1614. Up to 643 conditions per place. [2023-08-31 22:17:34,185 INFO L137 encePairwiseOnDemand]: 389/395 looper letters, 55 selfloop transitions, 1 changer transitions 0/69 dead transitions. [2023-08-31 22:17:34,185 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 69 transitions, 318 flow [2023-08-31 22:17:34,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:17:34,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:17:34,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 676 transitions. [2023-08-31 22:17:34,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.570464135021097 [2023-08-31 22:17:34,188 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 676 transitions. [2023-08-31 22:17:34,188 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 676 transitions. [2023-08-31 22:17:34,188 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:17:34,188 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 676 transitions. [2023-08-31 22:17:34,190 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 225.33333333333334) internal successors, (676), 3 states have internal predecessors, (676), 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) [2023-08-31 22:17:34,191 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 395.0) internal successors, (1580), 4 states have internal predecessors, (1580), 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) [2023-08-31 22:17:34,192 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 395.0) internal successors, (1580), 4 states have internal predecessors, (1580), 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) [2023-08-31 22:17:34,192 INFO L175 Difference]: Start difference. First operand has 75 places, 72 transitions, 210 flow. Second operand 3 states and 676 transitions. [2023-08-31 22:17:34,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 69 transitions, 318 flow [2023-08-31 22:17:34,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 69 transitions, 312 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 22:17:34,194 INFO L231 Difference]: Finished difference. Result has 70 places, 67 transitions, 196 flow [2023-08-31 22:17:34,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=196, PETRI_PLACES=70, PETRI_TRANSITIONS=67} [2023-08-31 22:17:34,194 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -31 predicate places. [2023-08-31 22:17:34,195 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 67 transitions, 196 flow [2023-08-31 22:17:34,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 211.66666666666666) internal successors, (635), 3 states have internal predecessors, (635), 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) [2023-08-31 22:17:34,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:17:34,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:17:34,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-08-31 22:17:34,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:17:34,404 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread0Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-08-31 22:17:34,404 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:17:34,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1744317545, now seen corresponding path program 1 times [2023-08-31 22:17:34,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:17:34,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1647631960] [2023-08-31 22:17:34,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:17:34,405 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:17:34,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:17:34,406 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-31 22:17:34,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-08-31 22:17:34,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:17:34,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-31 22:17:34,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:17:34,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-31 22:17:34,550 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-31 22:17:34,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-31 22:17:34,573 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-31 22:17:34,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-31 22:17:34,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:17:34,596 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 22:17:34,596 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:17:34,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1647631960] [2023-08-31 22:17:34,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1647631960] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:17:34,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:17:34,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 22:17:34,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417300877] [2023-08-31 22:17:34,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:17:34,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:17:34,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:17:34,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:17:34,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:17:34,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 395 [2023-08-31 22:17:34,751 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 67 transitions, 196 flow. Second operand has 3 states, 3 states have (on average 208.66666666666666) internal successors, (626), 3 states have internal predecessors, (626), 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) [2023-08-31 22:17:34,751 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:17:34,751 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 395 [2023-08-31 22:17:34,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:17:34,905 INFO L130 PetriNetUnfolder]: 415/735 cut-off events. [2023-08-31 22:17:34,905 INFO L131 PetriNetUnfolder]: For 128/128 co-relation queries the response was YES. [2023-08-31 22:17:34,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1589 conditions, 735 events. 415/735 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2324 event pairs, 271 based on Foata normal form. 0/653 useless extension candidates. Maximal degree in co-relation 1584. Up to 619 conditions per place. [2023-08-31 22:17:34,907 INFO L137 encePairwiseOnDemand]: 391/395 looper letters, 51 selfloop transitions, 2 changer transitions 0/66 dead transitions. [2023-08-31 22:17:34,907 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 66 transitions, 302 flow [2023-08-31 22:17:34,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:17:34,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:17:34,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 661 transitions. [2023-08-31 22:17:34,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5578059071729958 [2023-08-31 22:17:34,909 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 661 transitions. [2023-08-31 22:17:34,909 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 661 transitions. [2023-08-31 22:17:34,910 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:17:34,910 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 661 transitions. [2023-08-31 22:17:34,911 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 220.33333333333334) internal successors, (661), 3 states have internal predecessors, (661), 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) [2023-08-31 22:17:34,912 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 395.0) internal successors, (1580), 4 states have internal predecessors, (1580), 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) [2023-08-31 22:17:34,926 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 395.0) internal successors, (1580), 4 states have internal predecessors, (1580), 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) [2023-08-31 22:17:34,927 INFO L175 Difference]: Start difference. First operand has 70 places, 67 transitions, 196 flow. Second operand 3 states and 661 transitions. [2023-08-31 22:17:34,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 66 transitions, 302 flow [2023-08-31 22:17:34,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 66 transitions, 301 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 22:17:34,929 INFO L231 Difference]: Finished difference. Result has 69 places, 65 transitions, 195 flow [2023-08-31 22:17:34,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=195, PETRI_PLACES=69, PETRI_TRANSITIONS=65} [2023-08-31 22:17:34,930 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -32 predicate places. [2023-08-31 22:17:34,930 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 65 transitions, 195 flow [2023-08-31 22:17:34,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 208.66666666666666) internal successors, (626), 3 states have internal predecessors, (626), 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) [2023-08-31 22:17:34,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:17:34,931 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:17:34,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-08-31 22:17:35,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:17:35,141 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread0Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-08-31 22:17:35,141 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:17:35,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1744317546, now seen corresponding path program 1 times [2023-08-31 22:17:35,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:17:35,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1223521719] [2023-08-31 22:17:35,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:17:35,142 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:17:35,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:17:35,143 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-31 22:17:35,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-08-31 22:17:35,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:17:35,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-31 22:17:35,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:17:35,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 22:17:35,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-31 22:17:35,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 22:17:35,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 14 [2023-08-31 22:17:35,301 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-31 22:17:35,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-31 22:17:35,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 22:17:35,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 14 [2023-08-31 22:17:35,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:17:35,437 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 22:17:35,437 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:17:35,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1223521719] [2023-08-31 22:17:35,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1223521719] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:17:35,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:17:35,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 22:17:35,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281553822] [2023-08-31 22:17:35,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:17:35,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 22:17:35,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:17:35,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 22:17:35,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-31 22:17:36,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 395 [2023-08-31 22:17:36,133 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 65 transitions, 195 flow. Second operand has 5 states, 5 states have (on average 201.8) internal successors, (1009), 5 states have internal predecessors, (1009), 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) [2023-08-31 22:17:36,133 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:17:36,134 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 395 [2023-08-31 22:17:36,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:17:36,369 INFO L130 PetriNetUnfolder]: 403/707 cut-off events. [2023-08-31 22:17:36,369 INFO L131 PetriNetUnfolder]: For 128/128 co-relation queries the response was YES. [2023-08-31 22:17:36,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1541 conditions, 707 events. 403/707 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2180 event pairs, 260 based on Foata normal form. 0/633 useless extension candidates. Maximal degree in co-relation 1536. Up to 587 conditions per place. [2023-08-31 22:17:36,371 INFO L137 encePairwiseOnDemand]: 389/395 looper letters, 51 selfloop transitions, 5 changer transitions 0/68 dead transitions. [2023-08-31 22:17:36,371 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 68 transitions, 323 flow [2023-08-31 22:17:36,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 22:17:36,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 22:17:36,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1047 transitions. [2023-08-31 22:17:36,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.530126582278481 [2023-08-31 22:17:36,374 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1047 transitions. [2023-08-31 22:17:36,374 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1047 transitions. [2023-08-31 22:17:36,374 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:17:36,374 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1047 transitions. [2023-08-31 22:17:36,376 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 209.4) internal successors, (1047), 5 states have internal predecessors, (1047), 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) [2023-08-31 22:17:36,378 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 395.0) internal successors, (2370), 6 states have internal predecessors, (2370), 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) [2023-08-31 22:17:36,378 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 395.0) internal successors, (2370), 6 states have internal predecessors, (2370), 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) [2023-08-31 22:17:36,379 INFO L175 Difference]: Start difference. First operand has 69 places, 65 transitions, 195 flow. Second operand 5 states and 1047 transitions. [2023-08-31 22:17:36,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 68 transitions, 323 flow [2023-08-31 22:17:36,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 68 transitions, 319 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 22:17:36,381 INFO L231 Difference]: Finished difference. Result has 69 places, 63 transitions, 197 flow [2023-08-31 22:17:36,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=197, PETRI_PLACES=69, PETRI_TRANSITIONS=63} [2023-08-31 22:17:36,381 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -32 predicate places. [2023-08-31 22:17:36,381 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 63 transitions, 197 flow [2023-08-31 22:17:36,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 201.8) internal successors, (1009), 5 states have internal predecessors, (1009), 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) [2023-08-31 22:17:36,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:17:36,382 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:17:36,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-08-31 22:17:36,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:17:36,592 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread0Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-08-31 22:17:36,592 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:17:36,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1251902500, now seen corresponding path program 1 times [2023-08-31 22:17:36,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:17:36,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1355162579] [2023-08-31 22:17:36,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:17:36,593 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:17:36,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:17:36,594 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-31 22:17:36,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-08-31 22:17:36,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:17:36,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-31 22:17:36,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:17:36,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-31 22:17:36,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 22:17:36,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 22:17:36,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 14 [2023-08-31 22:17:36,758 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-31 22:17:36,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-31 22:17:36,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:17:36,795 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 22:17:36,795 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:17:36,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1355162579] [2023-08-31 22:17:36,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1355162579] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:17:36,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:17:36,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 22:17:36,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241243596] [2023-08-31 22:17:36,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:17:36,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 22:17:36,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:17:36,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 22:17:36,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-31 22:17:37,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 395 [2023-08-31 22:17:37,077 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 63 transitions, 197 flow. Second operand has 4 states, 4 states have (on average 204.75) internal successors, (819), 4 states have internal predecessors, (819), 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) [2023-08-31 22:17:37,077 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:17:37,077 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 395 [2023-08-31 22:17:37,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:17:37,222 INFO L130 PetriNetUnfolder]: 330/594 cut-off events. [2023-08-31 22:17:37,222 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-08-31 22:17:37,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1306 conditions, 594 events. 330/594 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1722 event pairs, 208 based on Foata normal form. 0/560 useless extension candidates. Maximal degree in co-relation 1301. Up to 488 conditions per place. [2023-08-31 22:17:37,224 INFO L137 encePairwiseOnDemand]: 388/395 looper letters, 47 selfloop transitions, 4 changer transitions 0/62 dead transitions. [2023-08-31 22:17:37,224 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 62 transitions, 305 flow [2023-08-31 22:17:37,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 22:17:37,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 22:17:37,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 853 transitions. [2023-08-31 22:17:37,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.539873417721519 [2023-08-31 22:17:37,225 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 853 transitions. [2023-08-31 22:17:37,226 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 853 transitions. [2023-08-31 22:17:37,226 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:17:37,226 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 853 transitions. [2023-08-31 22:17:37,227 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 213.25) internal successors, (853), 4 states have internal predecessors, (853), 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) [2023-08-31 22:17:37,228 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 395.0) internal successors, (1975), 5 states have internal predecessors, (1975), 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) [2023-08-31 22:17:37,229 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 395.0) internal successors, (1975), 5 states have internal predecessors, (1975), 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) [2023-08-31 22:17:37,229 INFO L175 Difference]: Start difference. First operand has 69 places, 63 transitions, 197 flow. Second operand 4 states and 853 transitions. [2023-08-31 22:17:37,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 62 transitions, 305 flow [2023-08-31 22:17:37,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 62 transitions, 295 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-31 22:17:37,230 INFO L231 Difference]: Finished difference. Result has 64 places, 59 transitions, 187 flow [2023-08-31 22:17:37,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, PETRI_DIFFERENCE_MINUEND_FLOW=179, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=187, PETRI_PLACES=64, PETRI_TRANSITIONS=59} [2023-08-31 22:17:37,231 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -37 predicate places. [2023-08-31 22:17:37,231 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 59 transitions, 187 flow [2023-08-31 22:17:37,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 204.75) internal successors, (819), 4 states have internal predecessors, (819), 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) [2023-08-31 22:17:37,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:17:37,231 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:17:37,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-08-31 22:17:37,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:17:37,432 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-08-31 22:17:37,432 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:17:37,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1643534116, now seen corresponding path program 1 times [2023-08-31 22:17:37,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:17:37,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1005744542] [2023-08-31 22:17:37,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:17:37,433 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:17:37,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:17:37,434 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-31 22:17:37,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-08-31 22:17:37,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:17:37,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-31 22:17:37,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:17:37,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-31 22:17:37,656 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-31 22:17:37,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-31 22:17:37,704 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2023-08-31 22:17:37,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2023-08-31 22:17:37,751 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2023-08-31 22:17:37,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2023-08-31 22:17:37,789 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2023-08-31 22:17:37,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2023-08-31 22:17:37,838 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2023-08-31 22:17:37,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2023-08-31 22:17:37,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 22:17:37,882 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-08-31 22:17:37,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 36 [2023-08-31 22:17:38,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 41 [2023-08-31 22:17:38,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:17:38,780 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 22:17:38,780 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:17:38,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1005744542] [2023-08-31 22:17:38,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1005744542] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:17:38,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:17:38,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 22:17:38,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939743803] [2023-08-31 22:17:38,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:17:38,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-31 22:17:38,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:17:38,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-31 22:17:38,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-31 22:17:39,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 395 [2023-08-31 22:17:39,863 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 59 transitions, 187 flow. Second operand has 6 states, 6 states have (on average 203.5) internal successors, (1221), 6 states have internal predecessors, (1221), 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) [2023-08-31 22:17:39,863 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:17:39,863 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 395 [2023-08-31 22:17:39,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:17:40,122 INFO L130 PetriNetUnfolder]: 325/588 cut-off events. [2023-08-31 22:17:40,123 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-08-31 22:17:40,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1282 conditions, 588 events. 325/588 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1713 event pairs, 205 based on Foata normal form. 1/555 useless extension candidates. Maximal degree in co-relation 1277. Up to 483 conditions per place. [2023-08-31 22:17:40,125 INFO L137 encePairwiseOnDemand]: 390/395 looper letters, 44 selfloop transitions, 5 changer transitions 0/61 dead transitions. [2023-08-31 22:17:40,125 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 61 transitions, 295 flow [2023-08-31 22:17:40,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 22:17:40,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 22:17:40,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 840 transitions. [2023-08-31 22:17:40,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5316455696202531 [2023-08-31 22:17:40,127 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 840 transitions. [2023-08-31 22:17:40,127 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 840 transitions. [2023-08-31 22:17:40,128 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:17:40,128 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 840 transitions. [2023-08-31 22:17:40,129 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 210.0) internal successors, (840), 4 states have internal predecessors, (840), 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) [2023-08-31 22:17:40,131 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 395.0) internal successors, (1975), 5 states have internal predecessors, (1975), 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) [2023-08-31 22:17:40,131 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 395.0) internal successors, (1975), 5 states have internal predecessors, (1975), 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) [2023-08-31 22:17:40,131 INFO L175 Difference]: Start difference. First operand has 64 places, 59 transitions, 187 flow. Second operand 4 states and 840 transitions. [2023-08-31 22:17:40,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 61 transitions, 295 flow [2023-08-31 22:17:40,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 61 transitions, 287 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-31 22:17:40,133 INFO L231 Difference]: Finished difference. Result has 65 places, 59 transitions, 196 flow [2023-08-31 22:17:40,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, PETRI_DIFFERENCE_MINUEND_FLOW=179, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=196, PETRI_PLACES=65, PETRI_TRANSITIONS=59} [2023-08-31 22:17:40,134 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -36 predicate places. [2023-08-31 22:17:40,134 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 59 transitions, 196 flow [2023-08-31 22:17:40,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 203.5) internal successors, (1221), 6 states have internal predecessors, (1221), 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) [2023-08-31 22:17:40,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:17:40,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:17:40,144 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Ended with exit code 0 [2023-08-31 22:17:40,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:17:40,344 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-08-31 22:17:40,344 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:17:40,345 INFO L85 PathProgramCache]: Analyzing trace with hash -826696940, now seen corresponding path program 1 times [2023-08-31 22:17:40,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:17:40,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1326264715] [2023-08-31 22:17:40,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:17:40,345 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:17:40,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:17:40,346 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-31 22:17:40,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-08-31 22:17:40,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:17:40,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-31 22:17:40,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:17:40,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-31 22:17:40,560 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-31 22:17:40,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-31 22:17:40,619 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2023-08-31 22:17:40,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2023-08-31 22:17:40,710 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2023-08-31 22:17:40,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2023-08-31 22:17:40,776 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2023-08-31 22:17:40,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2023-08-31 22:17:40,834 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2023-08-31 22:17:40,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2023-08-31 22:17:40,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 22:17:40,928 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-08-31 22:17:40,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 36 [2023-08-31 22:17:41,998 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 41 [2023-08-31 22:17:42,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 14 treesize of output 20 [2023-08-31 22:17:42,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:17:42,132 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 22:17:42,132 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:17:42,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1326264715] [2023-08-31 22:17:42,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1326264715] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:17:42,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:17:42,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-31 22:17:42,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137229413] [2023-08-31 22:17:42,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:17:42,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-31 22:17:42,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:17:42,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-31 22:17:42,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-31 22:17:44,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 395 [2023-08-31 22:17:44,464 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 59 transitions, 196 flow. Second operand has 8 states, 8 states have (on average 198.625) internal successors, (1589), 8 states have internal predecessors, (1589), 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) [2023-08-31 22:17:44,464 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:17:44,465 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 395 [2023-08-31 22:17:44,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:17:44,895 INFO L130 PetriNetUnfolder]: 325/587 cut-off events. [2023-08-31 22:17:44,895 INFO L131 PetriNetUnfolder]: For 121/121 co-relation queries the response was YES. [2023-08-31 22:17:44,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1290 conditions, 587 events. 325/587 cut-off events. For 121/121 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1703 event pairs, 204 based on Foata normal form. 1/554 useless extension candidates. Maximal degree in co-relation 1284. Up to 483 conditions per place. [2023-08-31 22:17:44,897 INFO L137 encePairwiseOnDemand]: 389/395 looper letters, 45 selfloop transitions, 6 changer transitions 0/62 dead transitions. [2023-08-31 22:17:44,897 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 62 transitions, 312 flow [2023-08-31 22:17:44,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 22:17:44,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 22:17:44,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1217 transitions. [2023-08-31 22:17:44,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5135021097046414 [2023-08-31 22:17:44,899 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1217 transitions. [2023-08-31 22:17:44,899 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1217 transitions. [2023-08-31 22:17:44,899 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:17:44,900 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1217 transitions. [2023-08-31 22:17:44,901 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 202.83333333333334) internal successors, (1217), 6 states have internal predecessors, (1217), 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) [2023-08-31 22:17:44,902 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 395.0) internal successors, (2765), 7 states have internal predecessors, (2765), 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) [2023-08-31 22:17:44,903 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 395.0) internal successors, (2765), 7 states have internal predecessors, (2765), 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) [2023-08-31 22:17:44,903 INFO L175 Difference]: Start difference. First operand has 65 places, 59 transitions, 196 flow. Second operand 6 states and 1217 transitions. [2023-08-31 22:17:44,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 62 transitions, 312 flow [2023-08-31 22:17:44,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 62 transitions, 302 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-31 22:17:44,904 INFO L231 Difference]: Finished difference. Result has 68 places, 59 transitions, 203 flow [2023-08-31 22:17:44,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=203, PETRI_PLACES=68, PETRI_TRANSITIONS=59} [2023-08-31 22:17:44,905 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -33 predicate places. [2023-08-31 22:17:44,905 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 59 transitions, 203 flow [2023-08-31 22:17:44,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 198.625) internal successors, (1589), 8 states have internal predecessors, (1589), 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) [2023-08-31 22:17:44,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:17:44,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:17:44,912 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Ended with exit code 0 [2023-08-31 22:17:45,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:17:45,109 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-08-31 22:17:45,109 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:17:45,109 INFO L85 PathProgramCache]: Analyzing trace with hash 142196399, now seen corresponding path program 1 times [2023-08-31 22:17:45,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:17:45,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2082795091] [2023-08-31 22:17:45,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:17:45,110 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:17:45,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:17:45,111 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-31 22:17:45,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-08-31 22:17:45,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:17:45,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-31 22:17:45,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:17:45,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-31 22:17:45,331 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-31 22:17:45,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-31 22:17:45,382 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2023-08-31 22:17:45,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2023-08-31 22:17:45,451 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2023-08-31 22:17:45,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2023-08-31 22:17:45,557 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2023-08-31 22:17:45,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2023-08-31 22:17:45,655 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2023-08-31 22:17:45,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2023-08-31 22:17:45,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 22:17:45,806 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-08-31 22:17:45,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 36 [2023-08-31 22:17:47,204 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 41 [2023-08-31 22:17:47,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2023-08-31 22:17:47,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 14 treesize of output 20 [2023-08-31 22:17:47,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:17:47,375 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 22:17:47,376 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:17:47,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2082795091] [2023-08-31 22:17:47,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2082795091] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:17:47,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:17:47,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-31 22:17:47,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020284615] [2023-08-31 22:17:47,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:17:47,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-31 22:17:47,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:17:47,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-31 22:17:47,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2023-08-31 22:17:49,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 395 [2023-08-31 22:17:49,406 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 59 transitions, 203 flow. Second operand has 10 states, 10 states have (on average 194.1) internal successors, (1941), 10 states have internal predecessors, (1941), 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) [2023-08-31 22:17:49,406 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:17:49,406 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 395 [2023-08-31 22:17:49,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:17:49,913 INFO L130 PetriNetUnfolder]: 325/586 cut-off events. [2023-08-31 22:17:49,913 INFO L131 PetriNetUnfolder]: For 134/134 co-relation queries the response was YES. [2023-08-31 22:17:49,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1296 conditions, 586 events. 325/586 cut-off events. For 134/134 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1700 event pairs, 203 based on Foata normal form. 1/553 useless extension candidates. Maximal degree in co-relation 1289. Up to 483 conditions per place. [2023-08-31 22:17:49,915 INFO L137 encePairwiseOnDemand]: 387/395 looper letters, 45 selfloop transitions, 9 changer transitions 0/64 dead transitions. [2023-08-31 22:17:49,915 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 64 transitions, 335 flow [2023-08-31 22:17:49,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-31 22:17:49,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-31 22:17:49,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1578 transitions. [2023-08-31 22:17:49,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49936708860759493 [2023-08-31 22:17:49,918 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1578 transitions. [2023-08-31 22:17:49,918 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1578 transitions. [2023-08-31 22:17:49,919 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:17:49,919 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1578 transitions. [2023-08-31 22:17:49,920 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 197.25) internal successors, (1578), 8 states have internal predecessors, (1578), 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) [2023-08-31 22:17:49,923 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 395.0) internal successors, (3555), 9 states have internal predecessors, (3555), 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) [2023-08-31 22:17:49,923 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 395.0) internal successors, (3555), 9 states have internal predecessors, (3555), 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) [2023-08-31 22:17:49,923 INFO L175 Difference]: Start difference. First operand has 68 places, 59 transitions, 203 flow. Second operand 8 states and 1578 transitions. [2023-08-31 22:17:49,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 64 transitions, 335 flow [2023-08-31 22:17:49,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 64 transitions, 323 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-31 22:17:49,924 INFO L231 Difference]: Finished difference. Result has 71 places, 59 transitions, 215 flow [2023-08-31 22:17:49,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=215, PETRI_PLACES=71, PETRI_TRANSITIONS=59} [2023-08-31 22:17:49,925 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -30 predicate places. [2023-08-31 22:17:49,925 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 59 transitions, 215 flow [2023-08-31 22:17:49,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 194.1) internal successors, (1941), 10 states have internal predecessors, (1941), 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) [2023-08-31 22:17:49,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:17:49,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:17:49,933 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Ended with exit code 0 [2023-08-31 22:17:50,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:17:50,126 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-08-31 22:17:50,126 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:17:50,126 INFO L85 PathProgramCache]: Analyzing trace with hash 113119549, now seen corresponding path program 1 times [2023-08-31 22:17:50,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:17:50,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [814795018] [2023-08-31 22:17:50,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:17:50,127 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:17:50,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:17:50,128 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-31 22:17:50,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-08-31 22:17:50,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:17:50,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-31 22:17:50,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:17:50,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-31 22:17:50,366 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-31 22:17:50,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-31 22:17:50,417 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-31 22:17:50,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-31 22:17:50,479 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-31 22:17:50,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-31 22:17:50,551 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-31 22:17:50,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-31 22:17:50,616 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-31 22:17:50,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-31 22:17:50,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 22:17:50,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2023-08-31 22:17:51,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2023-08-31 22:17:51,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2023-08-31 22:17:51,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2023-08-31 22:17:51,647 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 14 treesize of output 20 [2023-08-31 22:17:51,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:17:51,675 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 22:17:51,675 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:17:51,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [814795018] [2023-08-31 22:17:51,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [814795018] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:17:51,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:17:51,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-08-31 22:17:51,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641147753] [2023-08-31 22:17:51,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:17:51,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-31 22:17:51,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:17:51,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-31 22:17:51,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-08-31 22:17:53,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 395 [2023-08-31 22:17:53,894 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 59 transitions, 215 flow. Second operand has 12 states, 12 states have (on average 189.75) internal successors, (2277), 12 states have internal predecessors, (2277), 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) [2023-08-31 22:17:53,894 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:17:53,895 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 395 [2023-08-31 22:17:53,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:17:54,371 INFO L130 PetriNetUnfolder]: 325/585 cut-off events. [2023-08-31 22:17:54,372 INFO L131 PetriNetUnfolder]: For 142/142 co-relation queries the response was YES. [2023-08-31 22:17:54,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1303 conditions, 585 events. 325/585 cut-off events. For 142/142 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1695 event pairs, 202 based on Foata normal form. 1/552 useless extension candidates. Maximal degree in co-relation 1295. Up to 486 conditions per place. [2023-08-31 22:17:54,373 INFO L137 encePairwiseOnDemand]: 385/395 looper letters, 45 selfloop transitions, 13 changer transitions 0/67 dead transitions. [2023-08-31 22:17:54,374 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 67 transitions, 371 flow [2023-08-31 22:17:54,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-31 22:17:54,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-31 22:17:54,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1923 transitions. [2023-08-31 22:17:54,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48683544303797466 [2023-08-31 22:17:54,378 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1923 transitions. [2023-08-31 22:17:54,378 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1923 transitions. [2023-08-31 22:17:54,379 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:17:54,379 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1923 transitions. [2023-08-31 22:17:54,381 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 192.3) internal successors, (1923), 10 states have internal predecessors, (1923), 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) [2023-08-31 22:17:54,383 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 395.0) internal successors, (4345), 11 states have internal predecessors, (4345), 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) [2023-08-31 22:17:54,384 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 395.0) internal successors, (4345), 11 states have internal predecessors, (4345), 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) [2023-08-31 22:17:54,384 INFO L175 Difference]: Start difference. First operand has 71 places, 59 transitions, 215 flow. Second operand 10 states and 1923 transitions. [2023-08-31 22:17:54,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 67 transitions, 371 flow [2023-08-31 22:17:54,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 67 transitions, 353 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-08-31 22:17:54,386 INFO L231 Difference]: Finished difference. Result has 74 places, 59 transitions, 229 flow [2023-08-31 22:17:54,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, PETRI_DIFFERENCE_MINUEND_FLOW=197, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=229, PETRI_PLACES=74, PETRI_TRANSITIONS=59} [2023-08-31 22:17:54,387 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -27 predicate places. [2023-08-31 22:17:54,387 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 59 transitions, 229 flow [2023-08-31 22:17:54,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 189.75) internal successors, (2277), 12 states have internal predecessors, (2277), 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) [2023-08-31 22:17:54,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:17:54,388 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:17:54,398 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2023-08-31 22:17:54,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:17:54,598 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-08-31 22:17:54,598 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:17:54,598 INFO L85 PathProgramCache]: Analyzing trace with hash -788260631, now seen corresponding path program 1 times [2023-08-31 22:17:54,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:17:54,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [945306474] [2023-08-31 22:17:54,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:17:54,598 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:17:54,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:17:54,599 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-31 22:17:54,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-08-31 22:17:54,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:17:54,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-31 22:17:54,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:17:54,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-31 22:17:54,804 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-31 22:17:54,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-31 22:17:54,857 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2023-08-31 22:17:54,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2023-08-31 22:17:54,970 INFO L321 Elim1Store]: treesize reduction 66, result has 34.0 percent of original size [2023-08-31 22:17:54,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 59 [2023-08-31 22:17:55,095 INFO L321 Elim1Store]: treesize reduction 66, result has 34.0 percent of original size [2023-08-31 22:17:55,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 59 [2023-08-31 22:17:55,292 INFO L321 Elim1Store]: treesize reduction 66, result has 34.0 percent of original size [2023-08-31 22:17:55,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 59 [2023-08-31 22:17:55,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 22:17:55,854 INFO L321 Elim1Store]: treesize reduction 24, result has 48.9 percent of original size [2023-08-31 22:17:55,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 13 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 52 [2023-08-31 22:18:00,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 67 [2023-08-31 22:18:00,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 41 [2023-08-31 22:18:00,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2023-08-31 22:18:00,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2023-08-31 22:18:00,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 14 treesize of output 20 [2023-08-31 22:18:00,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:18:00,768 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 22:18:00,768 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:18:00,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [945306474] [2023-08-31 22:18:00,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [945306474] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:18:00,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:18:00,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-08-31 22:18:00,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018889855] [2023-08-31 22:18:00,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:18:00,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-31 22:18:00,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:18:00,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-31 22:18:00,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2023-08-31 22:18:04,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 395 [2023-08-31 22:18:04,653 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 59 transitions, 229 flow. Second operand has 14 states, 14 states have (on average 185.42857142857142) internal successors, (2596), 14 states have internal predecessors, (2596), 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) [2023-08-31 22:18:04,653 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:18:04,653 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 395 [2023-08-31 22:18:04,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:18:05,609 INFO L130 PetriNetUnfolder]: 325/584 cut-off events. [2023-08-31 22:18:05,609 INFO L131 PetriNetUnfolder]: For 133/133 co-relation queries the response was YES. [2023-08-31 22:18:05,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1307 conditions, 584 events. 325/584 cut-off events. For 133/133 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1691 event pairs, 202 based on Foata normal form. 1/551 useless extension candidates. Maximal degree in co-relation 1298. Up to 480 conditions per place. [2023-08-31 22:18:05,612 INFO L137 encePairwiseOnDemand]: 383/395 looper letters, 42 selfloop transitions, 15 changer transitions 0/66 dead transitions. [2023-08-31 22:18:05,612 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 66 transitions, 369 flow [2023-08-31 22:18:05,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-31 22:18:05,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-31 22:18:05,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2065 transitions. [2023-08-31 22:18:05,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.475258918296893 [2023-08-31 22:18:05,616 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2065 transitions. [2023-08-31 22:18:05,616 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2065 transitions. [2023-08-31 22:18:05,617 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:18:05,617 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2065 transitions. [2023-08-31 22:18:05,619 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 187.72727272727272) internal successors, (2065), 11 states have internal predecessors, (2065), 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) [2023-08-31 22:18:05,622 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 395.0) internal successors, (4740), 12 states have internal predecessors, (4740), 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) [2023-08-31 22:18:05,623 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 395.0) internal successors, (4740), 12 states have internal predecessors, (4740), 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) [2023-08-31 22:18:05,623 INFO L175 Difference]: Start difference. First operand has 74 places, 59 transitions, 229 flow. Second operand 11 states and 2065 transitions. [2023-08-31 22:18:05,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 66 transitions, 369 flow [2023-08-31 22:18:05,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 66 transitions, 327 flow, removed 0 selfloop flow, removed 13 redundant places. [2023-08-31 22:18:05,624 INFO L231 Difference]: Finished difference. Result has 70 places, 58 transitions, 205 flow [2023-08-31 22:18:05,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, PETRI_DIFFERENCE_MINUEND_FLOW=175, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=205, PETRI_PLACES=70, PETRI_TRANSITIONS=58} [2023-08-31 22:18:05,625 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -31 predicate places. [2023-08-31 22:18:05,625 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 58 transitions, 205 flow [2023-08-31 22:18:05,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 185.42857142857142) internal successors, (2596), 14 states have internal predecessors, (2596), 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) [2023-08-31 22:18:05,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:18:05,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:18:05,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2023-08-31 22:18:05,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:18:05,826 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-08-31 22:18:05,826 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:18:05,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1604208097, now seen corresponding path program 1 times [2023-08-31 22:18:05,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:18:05,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2011040028] [2023-08-31 22:18:05,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:18:05,827 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:18:05,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:18:05,828 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-31 22:18:05,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-08-31 22:18:06,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:18:06,087 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:18:06,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:18:06,290 INFO L130 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2023-08-31 22:18:06,290 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:18:06,291 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK (72 of 73 remaining) [2023-08-31 22:18:06,293 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (71 of 73 remaining) [2023-08-31 22:18:06,293 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (70 of 73 remaining) [2023-08-31 22:18:06,293 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (69 of 73 remaining) [2023-08-31 22:18:06,293 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (68 of 73 remaining) [2023-08-31 22:18:06,293 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (67 of 73 remaining) [2023-08-31 22:18:06,293 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (66 of 73 remaining) [2023-08-31 22:18:06,294 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (65 of 73 remaining) [2023-08-31 22:18:06,294 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (64 of 73 remaining) [2023-08-31 22:18:06,294 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (63 of 73 remaining) [2023-08-31 22:18:06,294 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (62 of 73 remaining) [2023-08-31 22:18:06,294 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (61 of 73 remaining) [2023-08-31 22:18:06,294 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (60 of 73 remaining) [2023-08-31 22:18:06,294 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 73 remaining) [2023-08-31 22:18:06,295 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (58 of 73 remaining) [2023-08-31 22:18:06,295 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 73 remaining) [2023-08-31 22:18:06,295 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 73 remaining) [2023-08-31 22:18:06,295 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (55 of 73 remaining) [2023-08-31 22:18:06,295 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 73 remaining) [2023-08-31 22:18:06,295 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 73 remaining) [2023-08-31 22:18:06,295 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 73 remaining) [2023-08-31 22:18:06,296 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (51 of 73 remaining) [2023-08-31 22:18:06,296 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err4INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (50 of 73 remaining) [2023-08-31 22:18:06,296 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err7INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (49 of 73 remaining) [2023-08-31 22:18:06,296 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err8INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (48 of 73 remaining) [2023-08-31 22:18:06,296 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err9INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (47 of 73 remaining) [2023-08-31 22:18:06,296 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 73 remaining) [2023-08-31 22:18:06,297 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 73 remaining) [2023-08-31 22:18:06,297 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 73 remaining) [2023-08-31 22:18:06,297 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 73 remaining) [2023-08-31 22:18:06,297 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 73 remaining) [2023-08-31 22:18:06,297 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 73 remaining) [2023-08-31 22:18:06,297 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 73 remaining) [2023-08-31 22:18:06,297 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 73 remaining) [2023-08-31 22:18:06,298 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 73 remaining) [2023-08-31 22:18:06,298 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 73 remaining) [2023-08-31 22:18:06,298 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 73 remaining) [2023-08-31 22:18:06,298 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 73 remaining) [2023-08-31 22:18:06,298 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (34 of 73 remaining) [2023-08-31 22:18:06,298 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (33 of 73 remaining) [2023-08-31 22:18:06,298 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 73 remaining) [2023-08-31 22:18:06,299 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 73 remaining) [2023-08-31 22:18:06,299 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 73 remaining) [2023-08-31 22:18:06,299 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 73 remaining) [2023-08-31 22:18:06,299 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 73 remaining) [2023-08-31 22:18:06,299 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 73 remaining) [2023-08-31 22:18:06,299 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 73 remaining) [2023-08-31 22:18:06,300 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 73 remaining) [2023-08-31 22:18:06,300 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 73 remaining) [2023-08-31 22:18:06,300 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 73 remaining) [2023-08-31 22:18:06,300 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 73 remaining) [2023-08-31 22:18:06,300 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 73 remaining) [2023-08-31 22:18:06,300 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 73 remaining) [2023-08-31 22:18:06,300 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 73 remaining) [2023-08-31 22:18:06,301 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 73 remaining) [2023-08-31 22:18:06,301 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 73 remaining) [2023-08-31 22:18:06,301 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 73 remaining) [2023-08-31 22:18:06,301 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 73 remaining) [2023-08-31 22:18:06,301 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 73 remaining) [2023-08-31 22:18:06,301 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 73 remaining) [2023-08-31 22:18:06,301 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Thread1of1ForFork4Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 73 remaining) [2023-08-31 22:18:06,302 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Thread1of1ForFork4Err2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (11 of 73 remaining) [2023-08-31 22:18:06,302 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Thread1of1ForFork4Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (10 of 73 remaining) [2023-08-31 22:18:06,302 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Thread1of1ForFork4Err6INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 73 remaining) [2023-08-31 22:18:06,302 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Thread1of1ForFork4Err10INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 73 remaining) [2023-08-31 22:18:06,302 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 73 remaining) [2023-08-31 22:18:06,302 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 73 remaining) [2023-08-31 22:18:06,302 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 73 remaining) [2023-08-31 22:18:06,303 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 73 remaining) [2023-08-31 22:18:06,303 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 73 remaining) [2023-08-31 22:18:06,303 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 73 remaining) [2023-08-31 22:18:06,303 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 73 remaining) [2023-08-31 22:18:06,303 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 73 remaining) [2023-08-31 22:18:06,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2023-08-31 22:18:06,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:18:06,515 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:18:06,520 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-31 22:18:06,520 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-31 22:18:06,630 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.08 10:18:06 BasicIcfg [2023-08-31 22:18:06,634 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-31 22:18:06,634 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-08-31 22:18:06,634 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-08-31 22:18:06,634 INFO L275 PluginConnector]: Witness Printer initialized [2023-08-31 22:18:06,635 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 10:16:58" (3/4) ... [2023-08-31 22:18:06,637 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-08-31 22:18:06,637 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-08-31 22:18:06,637 INFO L158 Benchmark]: Toolchain (without parser) took 70024.70ms. Allocated memory was 73.4MB in the beginning and 5.4GB in the end (delta: 5.4GB). Free memory was 49.8MB in the beginning and 4.5GB in the end (delta: -4.5GB). Peak memory consumption was 918.7MB. Max. memory is 16.1GB. [2023-08-31 22:18:06,638 INFO L158 Benchmark]: CDTParser took 0.86ms. Allocated memory is still 73.4MB. Free memory is still 51.9MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-31 22:18:06,638 INFO L158 Benchmark]: CACSL2BoogieTranslator took 689.55ms. Allocated memory was 73.4MB in the beginning and 102.8MB in the end (delta: 29.4MB). Free memory was 49.5MB in the beginning and 67.3MB in the end (delta: -17.8MB). Peak memory consumption was 27.4MB. Max. memory is 16.1GB. [2023-08-31 22:18:06,638 INFO L158 Benchmark]: Boogie Procedure Inliner took 67.65ms. Allocated memory is still 102.8MB. Free memory was 66.7MB in the beginning and 64.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-31 22:18:06,639 INFO L158 Benchmark]: Boogie Preprocessor took 61.30ms. Allocated memory is still 102.8MB. Free memory was 64.6MB in the beginning and 62.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-31 22:18:06,639 INFO L158 Benchmark]: RCFGBuilder took 664.47ms. Allocated memory is still 102.8MB. Free memory was 62.5MB in the beginning and 77.4MB in the end (delta: -14.9MB). Peak memory consumption was 30.1MB. Max. memory is 16.1GB. [2023-08-31 22:18:06,640 INFO L158 Benchmark]: TraceAbstraction took 68531.98ms. Allocated memory was 102.8MB in the beginning and 5.4GB in the end (delta: 5.3GB). Free memory was 76.8MB in the beginning and 4.5GB in the end (delta: -4.4GB). Peak memory consumption was 913.6MB. Max. memory is 16.1GB. [2023-08-31 22:18:06,640 INFO L158 Benchmark]: Witness Printer took 2.94ms. Allocated memory is still 5.4GB. Free memory was 4.5GB in the beginning and 4.5GB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-31 22:18:06,642 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.86ms. Allocated memory is still 73.4MB. Free memory is still 51.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 689.55ms. Allocated memory was 73.4MB in the beginning and 102.8MB in the end (delta: 29.4MB). Free memory was 49.5MB in the beginning and 67.3MB in the end (delta: -17.8MB). Peak memory consumption was 27.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 67.65ms. Allocated memory is still 102.8MB. Free memory was 66.7MB in the beginning and 64.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 61.30ms. Allocated memory is still 102.8MB. Free memory was 64.6MB in the beginning and 62.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 664.47ms. Allocated memory is still 102.8MB. Free memory was 62.5MB in the beginning and 77.4MB in the end (delta: -14.9MB). Peak memory consumption was 30.1MB. Max. memory is 16.1GB. * TraceAbstraction took 68531.98ms. Allocated memory was 102.8MB in the beginning and 5.4GB in the end (delta: 5.3GB). Free memory was 76.8MB in the beginning and 4.5GB in the end (delta: -4.4GB). Peak memory consumption was 913.6MB. Max. memory is 16.1GB. * Witness Printer took 2.94ms. Allocated memory is still 5.4GB. Free memory was 4.5GB in the beginning and 4.5GB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 9.3s, 181 PlacesBefore, 101 PlacesAfterwards, 169 TransitionsBefore, 87 TransitionsAfterwards, 2920 CoEnabledTransitionPairs, 5 FixpointIterations, 49 TrivialSequentialCompositions, 83 ConcurrentSequentialCompositions, 7 TrivialYvCompositions, 0 ConcurrentYvCompositions, 2 ChoiceCompositions, 141 TotalNumberOfCompositions, 6789 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 4383, independent: 4139, independent conditional: 0, independent unconditional: 4139, dependent: 244, dependent conditional: 0, dependent unconditional: 244, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1276, independent: 1216, independent conditional: 0, independent unconditional: 1216, dependent: 60, dependent conditional: 0, dependent unconditional: 60, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 4383, independent: 2923, independent conditional: 0, independent unconditional: 2923, dependent: 184, dependent conditional: 0, dependent unconditional: 184, unknown: 1276, unknown conditional: 0, unknown unconditional: 1276] , Statistics on independence cache: Total cache size (in pairs): 151, Positive cache size: 125, Positive conditional cache size: 0, Positive unconditional cache size: 125, Negative cache size: 26, Negative conditional cache size: 0, Negative unconditional cache size: 26, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - UnprovableResult [Line: 1159]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 1159. Possible FailurePath: [L1124] 0 char *v; [L1161] 0 pthread_t t; [L1162] FCALL, FORK 0 pthread_create(&t, 0, thread0, 0) VAL [arg={0:0}, pthread_create(&t, 0, thread0, 0)=2, t={-1073741801:0}, v={0:0}] [L1146] 1 pthread_t t1, t2, t3, t4, t5; [L1147] FCALL, FORK 1 pthread_create(&t1, 0, thread1, 0) VAL [arg={0:0}, arg={0:0}, arg={0:0}, pthread_create(&t1, 0, thread1, 0)=3, t1={15:0}, t2={13:0}, t3={23:0}, t4={-2147483637:0}, t5={-2147483625:0}, v={0:0}] [L1148] 1 \read(t1) VAL [\read(t1)=3, arg={0:0}, arg={0:0}, arg={0:0}, t1={15:0}, t2={13:0}, t3={23:0}, t4={-2147483637:0}, t5={-2147483625:0}, v={0:0}] [L1127] 2 v = malloc(sizeof(char)) [L1128] 2 return 0; [L1148] FCALL, JOIN 2 pthread_join(t1, 0) VAL [\read(t1)=3, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t1={15:0}, t2={13:0}, t3={23:0}, t4={-2147483637:0}, t5={-2147483625:0}, v={3:0}] [L1149] FCALL, FORK 1 pthread_create(&t2, 0, thread2, 0) VAL [\result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, pthread_create(&t2, 0, thread2, 0)=4, t1={15:0}, t2={13:0}, t3={23:0}, t4={-2147483637:0}, t5={-2147483625:0}, v={3:0}] [L1133] 3 v[0] = 'X' [L1135] 3 return 0; [L1150] FCALL, FORK 1 pthread_create(&t3, 0, thread3, 0) VAL [\result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, pthread_create(&t3, 0, thread3, 0)=5, t1={15:0}, t2={13:0}, t3={23:0}, t4={-2147483637:0}, t5={-2147483625:0}, v={3:0}] [L1140] 4 v[0] = 'Y' [L1142] 4 return 0; [L1151] FCALL, FORK 1 pthread_create(&t4, 0, thread2, 0) VAL [\result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, pthread_create(&t4, 0, thread2, 0)=6, t1={15:0}, t2={13:0}, t3={23:0}, t4={-2147483637:0}, t5={-2147483625:0}, v={3:0}] [L1133] 5 v[0] = 'X' [L1135] 5 return 0; [L1152] FCALL, FORK 1 pthread_create(&t5, 0, thread2, 0) VAL [\result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, pthread_create(&t5, 0, thread2, 0)=7, t1={15:0}, t2={13:0}, t3={23:0}, t4={-2147483637:0}, t5={-2147483625:0}, v={3:0}] [L1133] 6 v[0] = 'X' [L1135] 6 return 0; [L1153] 1 \read(t2) VAL [\read(t2)=4, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t1={15:0}, t2={13:0}, t3={23:0}, t4={-2147483637:0}, t5={-2147483625:0}, v={3:0}] [L1153] FCALL, JOIN 3 pthread_join(t2, 0) VAL [\read(t2)=4, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t1={15:0}, t2={13:0}, t3={23:0}, t4={-2147483637:0}, t5={-2147483625:0}, v={3:0}] [L1154] 1 \read(t3) VAL [\read(t3)=5, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t1={15:0}, t2={13:0}, t3={23:0}, t4={-2147483637:0}, t5={-2147483625:0}, v={3:0}] [L1154] FCALL, JOIN 4 pthread_join(t3, 0) VAL [\read(t3)=5, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t1={15:0}, t2={13:0}, t3={23:0}, t4={-2147483637:0}, t5={-2147483625:0}, v={3:0}] [L1155] 1 \read(t4) VAL [\read(t4)=6, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t1={15:0}, t2={13:0}, t3={23:0}, t4={-2147483637:0}, t5={-2147483625:0}, v={3:0}] [L1155] FCALL, JOIN 5 pthread_join(t4, 0) VAL [\read(t4)=6, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t1={15:0}, t2={13:0}, t3={23:0}, t4={-2147483637:0}, t5={-2147483625:0}, v={3:0}] [L1156] 1 \read(t5) VAL [\read(t5)=7, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t1={15:0}, t2={13:0}, t3={23:0}, t4={-2147483637:0}, t5={-2147483625:0}, v={3:0}] [L1156] FCALL, JOIN 6 pthread_join(t5, 0) VAL [\read(t5)=7, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t1={15:0}, t2={13:0}, t3={23:0}, t4={-2147483637:0}, t5={-2147483625:0}, v={3:0}] [L1157] 1 return 0; [L1157] 1 return 0; [L1157] 1 return 0; [L1157] 1 return 0; [L1157] 1 return 0; [L1157] 1 return 0; [L1163] 0 \read(t) VAL [\read(t)=2, \result={0:0}, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t={-1073741801:0}, v={3:0}] [L1163] FCALL, JOIN 1 pthread_join(t, 0) VAL [\read(t)=2, \result={0:0}, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t={-1073741801:0}, v={3:0}] [L1164] EXPR 0 v[0] [L1164] EXPR 0 v[0] == 'X' || v[0] == 'Y' [L1164] CALL 0 __VERIFIER_assert(v[0] == 'X' || v[0] == 'Y') [L1123] COND FALSE 0 !(!expression) [L1164] RET 0 __VERIFIER_assert(v[0] == 'X' || v[0] == 'Y') [L1165] 0 return 0; [L1165] 0 return 0; - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1151]: 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: 1152]: 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: 1150]: 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: 1149]: 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: 1147]: 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: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1123]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1162]: 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: 1150]: 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: 1152]: 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: 1149]: 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: 1151]: 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: 1147]: 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. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 11 procedures, 289 locations, 73 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: 68.2s, OverallIterations: 21, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 36.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 9.4s, HoareTripleCheckerStatistics: 8 mSolverCounterUnknown, 8858 SdHoareTripleChecker+Valid, 23.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 6068 mSDsluCounter, 778 SdHoareTripleChecker+Invalid, 21.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 494 mSDsCounter, 512 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 11768 IncrementalHoareTripleChecker+Invalid, 12288 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 512 mSolverCounterUnsat, 284 mSDtfsCounter, 11768 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 403 GetRequests, 289 SyntacticMatches, 5 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 3.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=245occurred in iteration=3, InterpolantAutomatonStates: 99, 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: 0.3s SsaConstructionTime, 1.2s SatisfiabilityAnalysisTime, 14.9s InterpolantComputationTime, 430 NumberOfCodeBlocks, 430 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 365 ConstructedInterpolants, 181 QuantifiedInterpolants, 10915 SizeOfPredicates, 69 NumberOfNonLiveVariables, 2783 ConjunctsInSsa, 253 ConjunctsInUnsatCore, 20 InterpolantComputations, 20 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 could not prove your program: unable to determine feasibility of some traces [2023-08-31 22:18:06,675 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... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample