./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 AFTER --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 AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 19:39:06,783 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 19:39:06,784 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 19:39:06,818 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 19:39:06,818 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 19:39:06,819 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 19:39:06,820 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 19:39:06,821 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 19:39:06,822 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 19:39:06,822 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 19:39:06,823 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 19:39:06,824 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 19:39:06,824 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 19:39:06,825 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 19:39:06,825 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 19:39:06,826 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 19:39:06,827 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 19:39:06,827 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 19:39:06,828 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 19:39:06,830 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 19:39:06,831 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 19:39:06,835 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 19:39:06,835 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 19:39:06,836 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 19:39:06,838 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 19:39:06,842 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 19:39:06,843 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 19:39:06,843 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 19:39:06,843 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 19:39:06,844 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 19:39:06,844 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 19:39:06,846 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 19:39:06,846 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 19:39:06,847 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 19:39:06,848 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 19:39:06,850 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 19:39:06,851 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 19:39:06,851 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 19:39:06,851 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 19:39:06,851 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 19:39:06,852 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 19:39:06,855 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-29 19:39:06,875 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 19:39:06,876 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 19:39:06,876 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 19:39:06,876 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 19:39:06,877 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 19:39:06,877 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 19:39:06,878 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 19:39:06,878 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 19:39:06,878 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 19:39:06,878 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 19:39:06,879 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 19:39:06,879 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 19:39:06,879 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 19:39:06,879 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 19:39:06,880 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 19:39:06,880 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 19:39:06,880 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 19:39:06,880 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 19:39:06,880 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 19:39:06,880 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 19:39:06,880 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 19:39:06,880 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 19:39:06,881 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 19:39:06,881 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 19:39:06,881 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 19:39:06,881 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 19:39:06,881 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 19:39:06,881 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 19:39:06,881 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-29 19:39:06,882 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-29 19:39:06,882 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 19:39:06,882 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 19:39:06,882 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 19:39:06,882 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 19:39:06,882 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9556b3eb7217f056a72a299bf0514e64606a248fa454b59dcc03e4a2e74c7c90 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 19:39:07,116 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 19:39:07,130 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 19:39:07,132 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 19:39:07,133 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 19:39:07,133 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 19:39:07,134 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/singleton_with-uninit-problems.i [2023-08-29 19:39:08,115 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 19:39:08,399 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 19:39:08,402 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/singleton_with-uninit-problems.i [2023-08-29 19:39:08,439 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6e6ac336/20bbcb92003240488d5a85ce10c11c1a/FLAGf1b169a7a [2023-08-29 19:39:08,455 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6e6ac336/20bbcb92003240488d5a85ce10c11c1a [2023-08-29 19:39:08,457 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 19:39:08,458 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 19:39:08,460 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 19:39:08,460 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 19:39:08,463 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 19:39:08,463 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 07:39:08" (1/1) ... [2023-08-29 19:39:08,465 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a8ffa6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:39:08, skipping insertion in model container [2023-08-29 19:39:08,466 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 07:39:08" (1/1) ... [2023-08-29 19:39:08,471 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 19:39:08,511 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 19:39:08,686 WARN L633 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-29 19:39:08,816 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] [2023-08-29 19:39:08,845 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 19:39:08,853 INFO L203 MainTranslator]: Completed pre-run [2023-08-29 19:39:08,865 WARN L633 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-29 19:39:08,877 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] [2023-08-29 19:39:08,893 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 19:39:08,939 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-29 19:39:08,939 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-29 19:39:08,939 WARN L667 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-08-29 19:39:08,944 INFO L208 MainTranslator]: Completed translation [2023-08-29 19:39:08,945 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:39:08 WrapperNode [2023-08-29 19:39:08,945 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 19:39:08,946 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-29 19:39:08,946 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-29 19:39:08,946 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-29 19:39:08,950 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:39:08" (1/1) ... [2023-08-29 19:39:08,970 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:39:08" (1/1) ... [2023-08-29 19:39:08,986 INFO L138 Inliner]: procedures = 325, calls = 53, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 41 [2023-08-29 19:39:08,987 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-29 19:39:08,987 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-29 19:39:08,987 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-29 19:39:08,987 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-29 19:39:08,993 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:39:08" (1/1) ... [2023-08-29 19:39:08,994 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:39:08" (1/1) ... [2023-08-29 19:39:08,996 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:39:08" (1/1) ... [2023-08-29 19:39:08,996 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:39:08" (1/1) ... [2023-08-29 19:39:09,001 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:39:08" (1/1) ... [2023-08-29 19:39:09,002 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:39:08" (1/1) ... [2023-08-29 19:39:09,003 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:39:08" (1/1) ... [2023-08-29 19:39:09,004 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:39:08" (1/1) ... [2023-08-29 19:39:09,006 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-29 19:39:09,007 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-29 19:39:09,007 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-29 19:39:09,007 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-29 19:39:09,007 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:39:08" (1/1) ... [2023-08-29 19:39:09,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 19:39:09,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:39:09,049 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) [2023-08-29 19:39:09,101 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 [2023-08-29 19:39:09,114 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-29 19:39:09,114 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-29 19:39:09,114 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-29 19:39:09,114 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-29 19:39:09,114 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-29 19:39:09,115 INFO L130 BoogieDeclarations]: Found specification of procedure thread0 [2023-08-29 19:39:09,115 INFO L138 BoogieDeclarations]: Found implementation of procedure thread0 [2023-08-29 19:39:09,115 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-29 19:39:09,115 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-29 19:39:09,115 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-29 19:39:09,116 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-29 19:39:09,116 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-29 19:39:09,116 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-29 19:39:09,116 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-29 19:39:09,116 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-29 19:39:09,116 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-29 19:39:09,116 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-29 19:39:09,116 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-29 19:39:09,117 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-29 19:39:09,117 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-29 19:39:09,273 INFO L236 CfgBuilder]: Building ICFG [2023-08-29 19:39:09,274 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-29 19:39:09,502 INFO L277 CfgBuilder]: Performing block encoding [2023-08-29 19:39:09,507 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-29 19:39:09,507 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-08-29 19:39:09,509 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 07:39:09 BoogieIcfgContainer [2023-08-29 19:39:09,509 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-29 19:39:09,510 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-29 19:39:09,510 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-29 19:39:09,512 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-29 19:39:09,512 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 07:39:08" (1/3) ... [2023-08-29 19:39:09,513 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6718a855 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 07:39:09, skipping insertion in model container [2023-08-29 19:39:09,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:39:08" (2/3) ... [2023-08-29 19:39:09,513 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6718a855 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 07:39:09, skipping insertion in model container [2023-08-29 19:39:09,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 07:39:09" (3/3) ... [2023-08-29 19:39:09,514 INFO L112 eAbstractionObserver]: Analyzing ICFG singleton_with-uninit-problems.i [2023-08-29 19:39:09,524 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-29 19:39:09,525 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 34 error locations. [2023-08-29 19:39:09,525 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-29 19:39:09,643 INFO L144 ThreadInstanceAdder]: Constructed 21 joinOtherThreadTransitions. [2023-08-29 19:39:09,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 260 places, 251 transitions, 609 flow [2023-08-29 19:39:09,749 INFO L130 PetriNetUnfolder]: 7/172 cut-off events. [2023-08-29 19:39:09,749 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-29 19:39:09,752 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. [2023-08-29 19:39:09,753 INFO L82 GeneralOperation]: Start removeDead. Operand has 260 places, 251 transitions, 609 flow [2023-08-29 19:39:09,761 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 180 places, 168 transitions, 387 flow [2023-08-29 19:39:09,763 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 19:39:09,773 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 180 places, 168 transitions, 387 flow [2023-08-29 19:39:09,778 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 180 places, 168 transitions, 387 flow [2023-08-29 19:39:09,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 180 places, 168 transitions, 387 flow [2023-08-29 19:39:09,815 INFO L130 PetriNetUnfolder]: 7/168 cut-off events. [2023-08-29 19:39:09,815 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-29 19:39:09,816 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. [2023-08-29 19:39:09,818 INFO L119 LiptonReduction]: Number of co-enabled transitions 2920 [2023-08-29 19:39:13,058 INFO L134 LiptonReduction]: Checked pairs total: 6675 [2023-08-29 19:39:13,059 INFO L136 LiptonReduction]: Total number of compositions: 138 [2023-08-29 19:39:13,074 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 19:39:13,078 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;@2f578d10, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 19:39:13,078 INFO L358 AbstractCegarLoop]: Starting to check reachability of 73 error locations. [2023-08-29 19:39:13,080 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-29 19:39:13,080 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 19:39:13,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:39:13,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-29 19:39:13,081 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-08-29 19:39:13,084 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:39:13,084 INFO L85 PathProgramCache]: Analyzing trace with hash 642, now seen corresponding path program 1 times [2023-08-29 19:39:13,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:39:13,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171940039] [2023-08-29 19:39:13,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:39:13,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:39:13,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:39:13,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:39:13,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:39:13,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171940039] [2023-08-29 19:39:13,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171940039] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:39:13,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:39:13,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-29 19:39:13,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647469533] [2023-08-29 19:39:13,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:39:13,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-29 19:39:13,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:39:13,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-29 19:39:13,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-29 19:39:13,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 391 [2023-08-29 19:39:13,183 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) [2023-08-29 19:39:13,183 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:39:13,183 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 391 [2023-08-29 19:39:13,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:39:14,877 INFO L130 PetriNetUnfolder]: 19439/26681 cut-off events. [2023-08-29 19:39:14,877 INFO L131 PetriNetUnfolder]: For 529/529 co-relation queries the response was YES. [2023-08-29 19:39:14,926 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. [2023-08-29 19:39:15,053 INFO L137 encePairwiseOnDemand]: 387/391 looper letters, 64 selfloop transitions, 0 changer transitions 0/83 dead transitions. [2023-08-29 19:39:15,054 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 83 transitions, 345 flow [2023-08-29 19:39:15,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-29 19:39:15,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-29 19:39:15,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 508 transitions. [2023-08-29 19:39:15,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.649616368286445 [2023-08-29 19:39:15,070 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 508 transitions. [2023-08-29 19:39:15,070 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 508 transitions. [2023-08-29 19:39:15,073 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:39:15,075 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 508 transitions. [2023-08-29 19:39:15,078 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) [2023-08-29 19:39:15,083 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) [2023-08-29 19:39:15,084 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) [2023-08-29 19:39:15,085 INFO L175 Difference]: Start difference. First operand has 101 places, 87 transitions, 225 flow. Second operand 2 states and 508 transitions. [2023-08-29 19:39:15,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 83 transitions, 345 flow [2023-08-29 19:39:15,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 83 transitions, 311 flow, removed 0 selfloop flow, removed 12 redundant places. [2023-08-29 19:39:15,145 INFO L231 Difference]: Finished difference. Result has 86 places, 83 transitions, 183 flow [2023-08-29 19:39:15,147 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} [2023-08-29 19:39:15,151 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -15 predicate places. [2023-08-29 19:39:15,152 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 83 transitions, 183 flow [2023-08-29 19:39:15,153 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) [2023-08-29 19:39:15,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:39:15,153 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 19:39:15,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-29 19:39:15,154 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-08-29 19:39:15,160 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:39:15,161 INFO L85 PathProgramCache]: Analyzing trace with hash 632141, now seen corresponding path program 1 times [2023-08-29 19:39:15,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:39:15,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813044227] [2023-08-29 19:39:15,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:39:15,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:39:15,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:39:15,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:39:15,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:39:15,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813044227] [2023-08-29 19:39:15,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813044227] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:39:15,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:39:15,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 19:39:15,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838052961] [2023-08-29 19:39:15,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:39:15,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:39:15,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:39:15,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:39:15,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:39:15,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 391 [2023-08-29 19:39:15,367 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) [2023-08-29 19:39:15,367 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:39:15,367 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 391 [2023-08-29 19:39:15,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:39:16,300 INFO L130 PetriNetUnfolder]: 14219/19666 cut-off events. [2023-08-29 19:39:16,301 INFO L131 PetriNetUnfolder]: For 63/63 co-relation queries the response was YES. [2023-08-29 19:39:16,315 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. [2023-08-29 19:39:16,377 INFO L137 encePairwiseOnDemand]: 382/391 looper letters, 68 selfloop transitions, 8 changer transitions 0/94 dead transitions. [2023-08-29 19:39:16,378 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 94 transitions, 358 flow [2023-08-29 19:39:16,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:39:16,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:39:16,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 683 transitions. [2023-08-29 19:39:16,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5822676896845694 [2023-08-29 19:39:16,380 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 683 transitions. [2023-08-29 19:39:16,380 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 683 transitions. [2023-08-29 19:39:16,380 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:39:16,380 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 683 transitions. [2023-08-29 19:39:16,382 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) [2023-08-29 19:39:16,383 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) [2023-08-29 19:39:16,384 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) [2023-08-29 19:39:16,384 INFO L175 Difference]: Start difference. First operand has 86 places, 83 transitions, 183 flow. Second operand 3 states and 683 transitions. [2023-08-29 19:39:16,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 94 transitions, 358 flow [2023-08-29 19:39:16,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 94 transitions, 358 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 19:39:16,387 INFO L231 Difference]: Finished difference. Result has 90 places, 89 transitions, 241 flow [2023-08-29 19:39:16,387 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} [2023-08-29 19:39:16,387 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -11 predicate places. [2023-08-29 19:39:16,388 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 89 transitions, 241 flow [2023-08-29 19:39:16,388 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) [2023-08-29 19:39:16,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:39:16,388 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 19:39:16,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-29 19:39:16,389 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-08-29 19:39:16,389 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:39:16,389 INFO L85 PathProgramCache]: Analyzing trace with hash 632142, now seen corresponding path program 1 times [2023-08-29 19:39:16,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:39:16,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100288759] [2023-08-29 19:39:16,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:39:16,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:39:16,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:39:16,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:39:16,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:39:16,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100288759] [2023-08-29 19:39:16,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100288759] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:39:16,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:39:16,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 19:39:16,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626346131] [2023-08-29 19:39:16,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:39:16,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:39:16,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:39:16,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:39:16,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:39:16,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 391 [2023-08-29 19:39:16,513 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) [2023-08-29 19:39:16,513 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:39:16,513 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 391 [2023-08-29 19:39:16,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:39:17,627 INFO L130 PetriNetUnfolder]: 17984/25240 cut-off events. [2023-08-29 19:39:17,628 INFO L131 PetriNetUnfolder]: For 1569/1569 co-relation queries the response was YES. [2023-08-29 19:39:17,666 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. [2023-08-29 19:39:17,733 INFO L137 encePairwiseOnDemand]: 379/391 looper letters, 121 selfloop transitions, 13 changer transitions 0/151 dead transitions. [2023-08-29 19:39:17,733 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 151 transitions, 663 flow [2023-08-29 19:39:17,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:39:17,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:39:17,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 751 transitions. [2023-08-29 19:39:17,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6402387041773231 [2023-08-29 19:39:17,736 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 751 transitions. [2023-08-29 19:39:17,736 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 751 transitions. [2023-08-29 19:39:17,736 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:39:17,736 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 751 transitions. [2023-08-29 19:39:17,737 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) [2023-08-29 19:39:17,739 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) [2023-08-29 19:39:17,740 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) [2023-08-29 19:39:17,740 INFO L175 Difference]: Start difference. First operand has 90 places, 89 transitions, 241 flow. Second operand 3 states and 751 transitions. [2023-08-29 19:39:17,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 151 transitions, 663 flow [2023-08-29 19:39:17,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 151 transitions, 645 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:39:17,743 INFO L231 Difference]: Finished difference. Result has 92 places, 98 transitions, 319 flow [2023-08-29 19:39:17,743 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} [2023-08-29 19:39:17,744 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -9 predicate places. [2023-08-29 19:39:17,744 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 98 transitions, 319 flow [2023-08-29 19:39:17,745 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) [2023-08-29 19:39:17,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:39:17,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-29 19:39:17,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-29 19:39:17,745 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-08-29 19:39:17,745 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:39:17,746 INFO L85 PathProgramCache]: Analyzing trace with hash 19594966, now seen corresponding path program 1 times [2023-08-29 19:39:17,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:39:17,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116051329] [2023-08-29 19:39:17,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:39:17,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:39:17,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:39:17,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:39:17,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:39:17,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116051329] [2023-08-29 19:39:17,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116051329] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:39:17,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:39:17,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:39:17,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081180397] [2023-08-29 19:39:17,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:39:17,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 19:39:17,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:39:17,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 19:39:17,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 19:39:18,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 391 [2023-08-29 19:39:18,094 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) [2023-08-29 19:39:18,094 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:39:18,094 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 391 [2023-08-29 19:39:18,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:39:19,044 INFO L130 PetriNetUnfolder]: 12756/18205 cut-off events. [2023-08-29 19:39:19,044 INFO L131 PetriNetUnfolder]: For 10326/10326 co-relation queries the response was YES. [2023-08-29 19:39:19,086 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. [2023-08-29 19:39:19,164 INFO L137 encePairwiseOnDemand]: 382/391 looper letters, 70 selfloop transitions, 10 changer transitions 0/101 dead transitions. [2023-08-29 19:39:19,164 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 101 transitions, 484 flow [2023-08-29 19:39:19,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 19:39:19,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 19:39:19,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 872 transitions. [2023-08-29 19:39:19,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5575447570332481 [2023-08-29 19:39:19,167 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 872 transitions. [2023-08-29 19:39:19,167 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 872 transitions. [2023-08-29 19:39:19,167 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:39:19,167 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 872 transitions. [2023-08-29 19:39:19,169 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) [2023-08-29 19:39:19,171 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) [2023-08-29 19:39:19,172 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) [2023-08-29 19:39:19,172 INFO L175 Difference]: Start difference. First operand has 92 places, 98 transitions, 319 flow. Second operand 4 states and 872 transitions. [2023-08-29 19:39:19,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 101 transitions, 484 flow [2023-08-29 19:39:19,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 101 transitions, 458 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:39:19,179 INFO L231 Difference]: Finished difference. Result has 92 places, 97 transitions, 309 flow [2023-08-29 19:39:19,179 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} [2023-08-29 19:39:19,180 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -9 predicate places. [2023-08-29 19:39:19,180 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 97 transitions, 309 flow [2023-08-29 19:39:19,181 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) [2023-08-29 19:39:19,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:39:19,181 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:39:19,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-29 19:39:19,181 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-08-29 19:39:19,181 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:39:19,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1439893220, now seen corresponding path program 1 times [2023-08-29 19:39:19,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:39:19,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676570621] [2023-08-29 19:39:19,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:39:19,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:39:19,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:39:19,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:39:19,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:39:19,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676570621] [2023-08-29 19:39:19,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676570621] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:39:19,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:39:19,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:39:19,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725205503] [2023-08-29 19:39:19,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:39:19,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:39:19,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:39:19,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:39:19,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:39:19,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 391 [2023-08-29 19:39:19,392 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) [2023-08-29 19:39:19,392 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:39:19,392 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 391 [2023-08-29 19:39:19,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:39:20,141 INFO L130 PetriNetUnfolder]: 12751/18192 cut-off events. [2023-08-29 19:39:20,141 INFO L131 PetriNetUnfolder]: For 4476/4476 co-relation queries the response was YES. [2023-08-29 19:39:20,159 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. [2023-08-29 19:39:20,206 INFO L137 encePairwiseOnDemand]: 387/391 looper letters, 72 selfloop transitions, 2 changer transitions 0/94 dead transitions. [2023-08-29 19:39:20,206 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 94 transitions, 447 flow [2023-08-29 19:39:20,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:39:20,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:39:20,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 675 transitions. [2023-08-29 19:39:20,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5754475703324808 [2023-08-29 19:39:20,208 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 675 transitions. [2023-08-29 19:39:20,208 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 675 transitions. [2023-08-29 19:39:20,208 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:39:20,208 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 675 transitions. [2023-08-29 19:39:20,210 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) [2023-08-29 19:39:20,211 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) [2023-08-29 19:39:20,212 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) [2023-08-29 19:39:20,212 INFO L175 Difference]: Start difference. First operand has 92 places, 97 transitions, 309 flow. Second operand 3 states and 675 transitions. [2023-08-29 19:39:20,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 94 transitions, 447 flow [2023-08-29 19:39:20,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 94 transitions, 435 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:39:20,216 INFO L231 Difference]: Finished difference. Result has 90 places, 94 transitions, 291 flow [2023-08-29 19:39:20,216 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} [2023-08-29 19:39:20,217 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -11 predicate places. [2023-08-29 19:39:20,217 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 94 transitions, 291 flow [2023-08-29 19:39:20,217 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) [2023-08-29 19:39:20,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:39:20,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:39:20,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-29 19:39:20,218 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-08-29 19:39:20,218 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:39:20,218 INFO L85 PathProgramCache]: Analyzing trace with hash 1439893221, now seen corresponding path program 1 times [2023-08-29 19:39:20,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:39:20,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97668891] [2023-08-29 19:39:20,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:39:20,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:39:20,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:39:20,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:39:20,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:39:20,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97668891] [2023-08-29 19:39:20,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97668891] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:39:20,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:39:20,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 19:39:20,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262527252] [2023-08-29 19:39:20,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:39:20,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 19:39:20,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:39:20,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 19:39:20,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 19:39:20,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 391 [2023-08-29 19:39:20,517 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) [2023-08-29 19:39:20,517 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:39:20,517 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 391 [2023-08-29 19:39:20,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:39:21,391 INFO L130 PetriNetUnfolder]: 12745/18177 cut-off events. [2023-08-29 19:39:21,391 INFO L131 PetriNetUnfolder]: For 4468/4468 co-relation queries the response was YES. [2023-08-29 19:39:21,411 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. [2023-08-29 19:39:21,467 INFO L137 encePairwiseOnDemand]: 387/391 looper letters, 69 selfloop transitions, 2 changer transitions 0/91 dead transitions. [2023-08-29 19:39:21,468 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 91 transitions, 423 flow [2023-08-29 19:39:21,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:39:21,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:39:21,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 664 transitions. [2023-08-29 19:39:21,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.566069906223359 [2023-08-29 19:39:21,470 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 664 transitions. [2023-08-29 19:39:21,470 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 664 transitions. [2023-08-29 19:39:21,471 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:39:21,471 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 664 transitions. [2023-08-29 19:39:21,472 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) [2023-08-29 19:39:21,474 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) [2023-08-29 19:39:21,479 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) [2023-08-29 19:39:21,479 INFO L175 Difference]: Start difference. First operand has 90 places, 94 transitions, 291 flow. Second operand 3 states and 664 transitions. [2023-08-29 19:39:21,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 91 transitions, 423 flow [2023-08-29 19:39:21,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 91 transitions, 419 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:39:21,483 INFO L231 Difference]: Finished difference. Result has 88 places, 91 transitions, 281 flow [2023-08-29 19:39:21,484 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} [2023-08-29 19:39:21,484 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -13 predicate places. [2023-08-29 19:39:21,484 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 91 transitions, 281 flow [2023-08-29 19:39:21,485 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) [2023-08-29 19:39:21,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:39:21,485 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:39:21,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-29 19:39:21,485 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread0Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-08-29 19:39:21,485 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:39:21,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1496705849, now seen corresponding path program 1 times [2023-08-29 19:39:21,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:39:21,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282791031] [2023-08-29 19:39:21,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:39:21,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:39:21,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:39:21,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:39:21,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:39:21,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282791031] [2023-08-29 19:39:21,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282791031] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:39:21,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:39:21,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 19:39:21,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241256499] [2023-08-29 19:39:21,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:39:21,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 19:39:21,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:39:21,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 19:39:21,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-29 19:39:21,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 391 [2023-08-29 19:39:21,941 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) [2023-08-29 19:39:21,941 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:39:21,941 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 391 [2023-08-29 19:39:21,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:39:22,462 INFO L130 PetriNetUnfolder]: 7622/11511 cut-off events. [2023-08-29 19:39:22,463 INFO L131 PetriNetUnfolder]: For 2921/2921 co-relation queries the response was YES. [2023-08-29 19:39:22,473 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. [2023-08-29 19:39:22,495 INFO L137 encePairwiseOnDemand]: 384/391 looper letters, 66 selfloop transitions, 5 changer transitions 0/90 dead transitions. [2023-08-29 19:39:22,496 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 90 transitions, 432 flow [2023-08-29 19:39:22,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 19:39:22,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 19:39:22,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 864 transitions. [2023-08-29 19:39:22,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5524296675191815 [2023-08-29 19:39:22,498 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 864 transitions. [2023-08-29 19:39:22,498 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 864 transitions. [2023-08-29 19:39:22,499 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:39:22,499 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 864 transitions. [2023-08-29 19:39:22,500 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) [2023-08-29 19:39:22,502 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) [2023-08-29 19:39:22,502 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) [2023-08-29 19:39:22,502 INFO L175 Difference]: Start difference. First operand has 88 places, 91 transitions, 281 flow. Second operand 4 states and 864 transitions. [2023-08-29 19:39:22,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 90 transitions, 432 flow [2023-08-29 19:39:22,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 90 transitions, 428 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:39:22,505 INFO L231 Difference]: Finished difference. Result has 85 places, 87 transitions, 279 flow [2023-08-29 19:39:22,505 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} [2023-08-29 19:39:22,506 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -16 predicate places. [2023-08-29 19:39:22,506 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 87 transitions, 279 flow [2023-08-29 19:39:22,506 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) [2023-08-29 19:39:22,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:39:22,507 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:39:22,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-29 19:39:22,507 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread0Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-08-29 19:39:22,507 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:39:22,507 INFO L85 PathProgramCache]: Analyzing trace with hash 479736861, now seen corresponding path program 1 times [2023-08-29 19:39:22,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:39:22,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794798923] [2023-08-29 19:39:22,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:39:22,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:39:22,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:39:22,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:39:22,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:39:22,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794798923] [2023-08-29 19:39:22,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794798923] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:39:22,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:39:22,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:39:22,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068900696] [2023-08-29 19:39:22,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:39:22,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:39:22,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:39:22,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:39:22,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:39:22,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 391 [2023-08-29 19:39:22,690 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) [2023-08-29 19:39:22,690 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:39:22,690 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 391 [2023-08-29 19:39:22,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:39:23,146 INFO L130 PetriNetUnfolder]: 8105/11790 cut-off events. [2023-08-29 19:39:23,147 INFO L131 PetriNetUnfolder]: For 3054/3054 co-relation queries the response was YES. [2023-08-29 19:39:23,158 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. [2023-08-29 19:39:23,185 INFO L137 encePairwiseOnDemand]: 387/391 looper letters, 66 selfloop transitions, 3 changer transitions 0/86 dead transitions. [2023-08-29 19:39:23,185 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 86 transitions, 419 flow [2023-08-29 19:39:23,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:39:23,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:39:23,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 669 transitions. [2023-08-29 19:39:23,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5703324808184144 [2023-08-29 19:39:23,187 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 669 transitions. [2023-08-29 19:39:23,188 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 669 transitions. [2023-08-29 19:39:23,188 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:39:23,188 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 669 transitions. [2023-08-29 19:39:23,189 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) [2023-08-29 19:39:23,190 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) [2023-08-29 19:39:23,191 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) [2023-08-29 19:39:23,191 INFO L175 Difference]: Start difference. First operand has 85 places, 87 transitions, 279 flow. Second operand 3 states and 669 transitions. [2023-08-29 19:39:23,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 86 transitions, 419 flow [2023-08-29 19:39:23,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 86 transitions, 409 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 19:39:23,193 INFO L231 Difference]: Finished difference. Result has 82 places, 85 transitions, 271 flow [2023-08-29 19:39:23,193 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} [2023-08-29 19:39:23,194 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -19 predicate places. [2023-08-29 19:39:23,194 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 85 transitions, 271 flow [2023-08-29 19:39:23,194 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) [2023-08-29 19:39:23,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:39:23,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:39:23,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-29 19:39:23,195 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread0Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-08-29 19:39:23,195 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:39:23,195 INFO L85 PathProgramCache]: Analyzing trace with hash 479736860, now seen corresponding path program 1 times [2023-08-29 19:39:23,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:39:23,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119776588] [2023-08-29 19:39:23,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:39:23,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:39:23,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:39:23,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:39:23,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:39:23,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119776588] [2023-08-29 19:39:23,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119776588] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:39:23,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:39:23,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 19:39:23,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865209317] [2023-08-29 19:39:23,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:39:23,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 19:39:23,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:39:23,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 19:39:23,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-29 19:39:23,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 391 [2023-08-29 19:39:23,575 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) [2023-08-29 19:39:23,575 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:39:23,575 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 391 [2023-08-29 19:39:23,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:39:24,032 INFO L130 PetriNetUnfolder]: 8092/11573 cut-off events. [2023-08-29 19:39:24,032 INFO L131 PetriNetUnfolder]: For 3042/3042 co-relation queries the response was YES. [2023-08-29 19:39:24,042 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. [2023-08-29 19:39:24,068 INFO L137 encePairwiseOnDemand]: 386/391 looper letters, 65 selfloop transitions, 5 changer transitions 0/86 dead transitions. [2023-08-29 19:39:24,069 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 86 transitions, 424 flow [2023-08-29 19:39:24,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 19:39:24,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 19:39:24,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 861 transitions. [2023-08-29 19:39:24,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5505115089514067 [2023-08-29 19:39:24,071 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 861 transitions. [2023-08-29 19:39:24,071 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 861 transitions. [2023-08-29 19:39:24,071 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:39:24,072 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 861 transitions. [2023-08-29 19:39:24,073 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) [2023-08-29 19:39:24,074 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) [2023-08-29 19:39:24,075 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) [2023-08-29 19:39:24,075 INFO L175 Difference]: Start difference. First operand has 82 places, 85 transitions, 271 flow. Second operand 4 states and 861 transitions. [2023-08-29 19:39:24,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 86 transitions, 424 flow [2023-08-29 19:39:24,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 86 transitions, 418 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:39:24,078 INFO L231 Difference]: Finished difference. Result has 81 places, 83 transitions, 271 flow [2023-08-29 19:39:24,078 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} [2023-08-29 19:39:24,079 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -20 predicate places. [2023-08-29 19:39:24,079 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 83 transitions, 271 flow [2023-08-29 19:39:24,079 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) [2023-08-29 19:39:24,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:39:24,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:39:24,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-29 19:39:24,080 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-08-29 19:39:24,080 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:39:24,080 INFO L85 PathProgramCache]: Analyzing trace with hash 479736785, now seen corresponding path program 1 times [2023-08-29 19:39:24,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:39:24,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156935022] [2023-08-29 19:39:24,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:39:24,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:39:24,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:39:24,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:39:24,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:39:24,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156935022] [2023-08-29 19:39:24,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156935022] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:39:24,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:39:24,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:39:24,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113548659] [2023-08-29 19:39:24,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:39:24,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:39:24,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:39:24,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:39:24,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:39:24,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 391 [2023-08-29 19:39:24,217 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) [2023-08-29 19:39:24,217 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:39:24,217 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 391 [2023-08-29 19:39:24,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:39:24,400 INFO L130 PetriNetUnfolder]: 2562/4003 cut-off events. [2023-08-29 19:39:24,401 INFO L131 PetriNetUnfolder]: For 1155/1155 co-relation queries the response was YES. [2023-08-29 19:39:24,404 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. [2023-08-29 19:39:24,443 INFO L137 encePairwiseOnDemand]: 385/391 looper letters, 63 selfloop transitions, 2 changer transitions 0/80 dead transitions. [2023-08-29 19:39:24,444 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 80 transitions, 399 flow [2023-08-29 19:39:24,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:39:24,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:39:24,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 676 transitions. [2023-08-29 19:39:24,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5763000852514919 [2023-08-29 19:39:24,446 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 676 transitions. [2023-08-29 19:39:24,446 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 676 transitions. [2023-08-29 19:39:24,446 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:39:24,446 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 676 transitions. [2023-08-29 19:39:24,447 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) [2023-08-29 19:39:24,448 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) [2023-08-29 19:39:24,449 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) [2023-08-29 19:39:24,449 INFO L175 Difference]: Start difference. First operand has 81 places, 83 transitions, 271 flow. Second operand 3 states and 676 transitions. [2023-08-29 19:39:24,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 80 transitions, 399 flow [2023-08-29 19:39:24,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 80 transitions, 389 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 19:39:24,450 INFO L231 Difference]: Finished difference. Result has 75 places, 78 transitions, 255 flow [2023-08-29 19:39:24,450 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} [2023-08-29 19:39:24,451 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -26 predicate places. [2023-08-29 19:39:24,451 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 78 transitions, 255 flow [2023-08-29 19:39:24,451 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) [2023-08-29 19:39:24,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:39:24,451 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:39:24,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-29 19:39:24,451 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-08-29 19:39:24,452 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:39:24,452 INFO L85 PathProgramCache]: Analyzing trace with hash 479736784, now seen corresponding path program 1 times [2023-08-29 19:39:24,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:39:24,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552906588] [2023-08-29 19:39:24,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:39:24,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:39:24,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:39:24,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:39:24,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:39:24,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552906588] [2023-08-29 19:39:24,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552906588] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:39:24,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:39:24,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:39:24,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271162971] [2023-08-29 19:39:24,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:39:24,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:39:24,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:39:24,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:39:24,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:39:24,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 391 [2023-08-29 19:39:24,589 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) [2023-08-29 19:39:24,589 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:39:24,590 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 391 [2023-08-29 19:39:24,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:39:24,673 INFO L130 PetriNetUnfolder]: 566/1062 cut-off events. [2023-08-29 19:39:24,674 INFO L131 PetriNetUnfolder]: For 380/380 co-relation queries the response was YES. [2023-08-29 19:39:24,675 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. [2023-08-29 19:39:24,677 INFO L137 encePairwiseOnDemand]: 384/391 looper letters, 53 selfloop transitions, 4 changer transitions 0/76 dead transitions. [2023-08-29 19:39:24,677 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 76 transitions, 369 flow [2023-08-29 19:39:24,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:39:24,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:39:24,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 636 transitions. [2023-08-29 19:39:24,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5421994884910486 [2023-08-29 19:39:24,678 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 636 transitions. [2023-08-29 19:39:24,679 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 636 transitions. [2023-08-29 19:39:24,679 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:39:24,679 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 636 transitions. [2023-08-29 19:39:24,680 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) [2023-08-29 19:39:24,681 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) [2023-08-29 19:39:24,682 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) [2023-08-29 19:39:24,682 INFO L175 Difference]: Start difference. First operand has 75 places, 78 transitions, 255 flow. Second operand 3 states and 636 transitions. [2023-08-29 19:39:24,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 76 transitions, 369 flow [2023-08-29 19:39:24,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 76 transitions, 367 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 19:39:24,683 INFO L231 Difference]: Finished difference. Result has 72 places, 74 transitions, 253 flow [2023-08-29 19:39:24,684 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} [2023-08-29 19:39:24,684 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -29 predicate places. [2023-08-29 19:39:24,684 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 74 transitions, 253 flow [2023-08-29 19:39:24,685 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) [2023-08-29 19:39:24,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:39:24,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:39:24,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-29 19:39:24,685 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread0Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-08-29 19:39:24,685 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:39:24,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1465638315, now seen corresponding path program 1 times [2023-08-29 19:39:24,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:39:24,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186188466] [2023-08-29 19:39:24,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:39:24,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:39:24,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:39:24,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:39:24,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:39:24,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186188466] [2023-08-29 19:39:24,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186188466] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:39:24,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:39:24,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:39:24,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897227194] [2023-08-29 19:39:24,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:39:24,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:39:24,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:39:24,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:39:24,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:39:24,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 391 [2023-08-29 19:39:24,836 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) [2023-08-29 19:39:24,836 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:39:24,836 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 391 [2023-08-29 19:39:24,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:39:24,916 INFO L130 PetriNetUnfolder]: 566/1038 cut-off events. [2023-08-29 19:39:24,916 INFO L131 PetriNetUnfolder]: For 379/379 co-relation queries the response was YES. [2023-08-29 19:39:24,917 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. [2023-08-29 19:39:24,919 INFO L137 encePairwiseOnDemand]: 387/391 looper letters, 55 selfloop transitions, 3 changer transitions 0/73 dead transitions. [2023-08-29 19:39:24,919 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 73 transitions, 371 flow [2023-08-29 19:39:24,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:39:24,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:39:24,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 658 transitions. [2023-08-29 19:39:24,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609548167092924 [2023-08-29 19:39:24,921 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 658 transitions. [2023-08-29 19:39:24,921 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 658 transitions. [2023-08-29 19:39:24,921 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:39:24,921 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 658 transitions. [2023-08-29 19:39:24,922 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) [2023-08-29 19:39:24,924 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) [2023-08-29 19:39:24,924 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) [2023-08-29 19:39:24,924 INFO L175 Difference]: Start difference. First operand has 72 places, 74 transitions, 253 flow. Second operand 3 states and 658 transitions. [2023-08-29 19:39:24,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 73 transitions, 371 flow [2023-08-29 19:39:24,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 73 transitions, 363 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:39:24,926 INFO L231 Difference]: Finished difference. Result has 70 places, 72 transitions, 247 flow [2023-08-29 19:39:24,926 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} [2023-08-29 19:39:24,926 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -31 predicate places. [2023-08-29 19:39:24,926 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 72 transitions, 247 flow [2023-08-29 19:39:24,927 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) [2023-08-29 19:39:24,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:39:24,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:39:24,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-29 19:39:24,927 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread0Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-08-29 19:39:24,927 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:39:24,928 INFO L85 PathProgramCache]: Analyzing trace with hash -646933216, now seen corresponding path program 1 times [2023-08-29 19:39:24,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:39:24,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844555179] [2023-08-29 19:39:24,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:39:24,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:39:24,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:39:25,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:39:25,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:39:25,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844555179] [2023-08-29 19:39:25,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844555179] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:39:25,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:39:25,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 19:39:25,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699716564] [2023-08-29 19:39:25,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:39:25,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 19:39:25,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:39:25,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 19:39:25,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-29 19:39:25,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 391 [2023-08-29 19:39:25,215 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) [2023-08-29 19:39:25,215 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:39:25,215 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 391 [2023-08-29 19:39:25,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:39:25,305 INFO L130 PetriNetUnfolder]: 550/998 cut-off events. [2023-08-29 19:39:25,305 INFO L131 PetriNetUnfolder]: For 360/360 co-relation queries the response was YES. [2023-08-29 19:39:25,306 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. [2023-08-29 19:39:25,308 INFO L137 encePairwiseOnDemand]: 386/391 looper letters, 54 selfloop transitions, 5 changer transitions 0/73 dead transitions. [2023-08-29 19:39:25,308 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 73 transitions, 378 flow [2023-08-29 19:39:25,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 19:39:25,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 19:39:25,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 850 transitions. [2023-08-29 19:39:25,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5434782608695652 [2023-08-29 19:39:25,310 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 850 transitions. [2023-08-29 19:39:25,310 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 850 transitions. [2023-08-29 19:39:25,311 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:39:25,311 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 850 transitions. [2023-08-29 19:39:25,312 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) [2023-08-29 19:39:25,314 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) [2023-08-29 19:39:25,314 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) [2023-08-29 19:39:25,314 INFO L175 Difference]: Start difference. First operand has 70 places, 72 transitions, 247 flow. Second operand 4 states and 850 transitions. [2023-08-29 19:39:25,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 73 transitions, 378 flow [2023-08-29 19:39:25,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 73 transitions, 372 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:39:25,316 INFO L231 Difference]: Finished difference. Result has 69 places, 70 transitions, 247 flow [2023-08-29 19:39:25,316 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} [2023-08-29 19:39:25,316 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -32 predicate places. [2023-08-29 19:39:25,316 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 70 transitions, 247 flow [2023-08-29 19:39:25,317 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) [2023-08-29 19:39:25,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:39:25,317 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] [2023-08-29 19:39:25,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-29 19:39:25,317 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread0Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-08-29 19:39:25,317 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:39:25,318 INFO L85 PathProgramCache]: Analyzing trace with hash -270838657, now seen corresponding path program 1 times [2023-08-29 19:39:25,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:39:25,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012666593] [2023-08-29 19:39:25,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:39:25,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:39:25,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:39:25,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:39:25,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:39:25,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012666593] [2023-08-29 19:39:25,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012666593] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:39:25,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:39:25,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 19:39:25,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136258158] [2023-08-29 19:39:25,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:39:25,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 19:39:25,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:39:25,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 19:39:25,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 19:39:25,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 391 [2023-08-29 19:39:25,546 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) [2023-08-29 19:39:25,546 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:39:25,546 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 391 [2023-08-29 19:39:25,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:39:25,623 INFO L130 PetriNetUnfolder]: 451/839 cut-off events. [2023-08-29 19:39:25,623 INFO L131 PetriNetUnfolder]: For 310/310 co-relation queries the response was YES. [2023-08-29 19:39:25,624 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. [2023-08-29 19:39:25,626 INFO L137 encePairwiseOnDemand]: 384/391 looper letters, 50 selfloop transitions, 5 changer transitions 0/69 dead transitions. [2023-08-29 19:39:25,626 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 69 transitions, 366 flow [2023-08-29 19:39:25,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 19:39:25,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 19:39:25,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 849 transitions. [2023-08-29 19:39:25,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5428388746803069 [2023-08-29 19:39:25,628 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 849 transitions. [2023-08-29 19:39:25,628 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 849 transitions. [2023-08-29 19:39:25,628 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:39:25,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 849 transitions. [2023-08-29 19:39:25,630 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) [2023-08-29 19:39:25,631 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) [2023-08-29 19:39:25,632 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) [2023-08-29 19:39:25,632 INFO L175 Difference]: Start difference. First operand has 69 places, 70 transitions, 247 flow. Second operand 4 states and 849 transitions. [2023-08-29 19:39:25,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 69 transitions, 366 flow [2023-08-29 19:39:25,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 69 transitions, 356 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 19:39:25,633 INFO L231 Difference]: Finished difference. Result has 65 places, 66 transitions, 239 flow [2023-08-29 19:39:25,633 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} [2023-08-29 19:39:25,634 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -36 predicate places. [2023-08-29 19:39:25,634 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 66 transitions, 239 flow [2023-08-29 19:39:25,634 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) [2023-08-29 19:39:25,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:39:25,635 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] [2023-08-29 19:39:25,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-29 19:39:25,635 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-08-29 19:39:25,635 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:39:25,635 INFO L85 PathProgramCache]: Analyzing trace with hash -2064658219, now seen corresponding path program 1 times [2023-08-29 19:39:25,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:39:25,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364025352] [2023-08-29 19:39:25,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:39:25,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:39:25,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:39:26,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:39:26,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:39:26,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364025352] [2023-08-29 19:39:26,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364025352] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:39:26,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:39:26,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-29 19:39:26,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520871765] [2023-08-29 19:39:26,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:39:26,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-29 19:39:26,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:39:26,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-29 19:39:26,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2023-08-29 19:39:27,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 391 [2023-08-29 19:39:27,397 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) [2023-08-29 19:39:27,397 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:39:27,397 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 391 [2023-08-29 19:39:27,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:39:27,591 INFO L130 PetriNetUnfolder]: 494/881 cut-off events. [2023-08-29 19:39:27,592 INFO L131 PetriNetUnfolder]: For 316/316 co-relation queries the response was YES. [2023-08-29 19:39:27,593 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. [2023-08-29 19:39:27,594 INFO L137 encePairwiseOnDemand]: 379/391 looper letters, 52 selfloop transitions, 14 changer transitions 0/73 dead transitions. [2023-08-29 19:39:27,594 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 73 transitions, 399 flow [2023-08-29 19:39:27,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-29 19:39:27,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-29 19:39:27,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1277 transitions. [2023-08-29 19:39:27,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46656923639020825 [2023-08-29 19:39:27,597 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1277 transitions. [2023-08-29 19:39:27,597 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1277 transitions. [2023-08-29 19:39:27,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:39:27,598 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1277 transitions. [2023-08-29 19:39:27,600 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) [2023-08-29 19:39:27,602 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) [2023-08-29 19:39:27,602 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) [2023-08-29 19:39:27,602 INFO L175 Difference]: Start difference. First operand has 65 places, 66 transitions, 239 flow. Second operand 7 states and 1277 transitions. [2023-08-29 19:39:27,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 73 transitions, 399 flow [2023-08-29 19:39:27,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 73 transitions, 389 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 19:39:27,604 INFO L231 Difference]: Finished difference. Result has 70 places, 67 transitions, 281 flow [2023-08-29 19:39:27,604 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} [2023-08-29 19:39:27,605 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -31 predicate places. [2023-08-29 19:39:27,605 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 67 transitions, 281 flow [2023-08-29 19:39:27,605 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) [2023-08-29 19:39:27,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:39:27,606 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] [2023-08-29 19:39:27,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-29 19:39:27,606 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-08-29 19:39:27,606 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:39:27,606 INFO L85 PathProgramCache]: Analyzing trace with hash 420102470, now seen corresponding path program 1 times [2023-08-29 19:39:27,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:39:27,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133078458] [2023-08-29 19:39:27,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:39:27,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:39:27,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:39:28,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:39:28,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:39:28,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133078458] [2023-08-29 19:39:28,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133078458] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:39:28,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:39:28,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-29 19:39:28,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547961699] [2023-08-29 19:39:28,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:39:28,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-29 19:39:28,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:39:28,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-29 19:39:28,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2023-08-29 19:39:28,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 391 [2023-08-29 19:39:28,748 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) [2023-08-29 19:39:28,748 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:39:28,748 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 391 [2023-08-29 19:39:28,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:39:28,896 INFO L130 PetriNetUnfolder]: 444/830 cut-off events. [2023-08-29 19:39:28,896 INFO L131 PetriNetUnfolder]: For 340/340 co-relation queries the response was YES. [2023-08-29 19:39:28,897 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. [2023-08-29 19:39:28,898 INFO L137 encePairwiseOnDemand]: 376/391 looper letters, 47 selfloop transitions, 21 changer transitions 0/77 dead transitions. [2023-08-29 19:39:28,898 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 77 transitions, 466 flow [2023-08-29 19:39:28,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-29 19:39:28,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-29 19:39:28,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1974 transitions. [2023-08-29 19:39:28,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4589630318530574 [2023-08-29 19:39:28,902 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1974 transitions. [2023-08-29 19:39:28,902 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1974 transitions. [2023-08-29 19:39:28,902 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:39:28,903 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1974 transitions. [2023-08-29 19:39:28,905 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) [2023-08-29 19:39:28,908 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) [2023-08-29 19:39:28,909 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) [2023-08-29 19:39:28,909 INFO L175 Difference]: Start difference. First operand has 70 places, 67 transitions, 281 flow. Second operand 11 states and 1974 transitions. [2023-08-29 19:39:28,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 77 transitions, 466 flow [2023-08-29 19:39:28,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 77 transitions, 451 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-29 19:39:28,911 INFO L231 Difference]: Finished difference. Result has 78 places, 68 transitions, 335 flow [2023-08-29 19:39:28,911 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} [2023-08-29 19:39:28,911 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -23 predicate places. [2023-08-29 19:39:28,911 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 68 transitions, 335 flow [2023-08-29 19:39:28,912 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) [2023-08-29 19:39:28,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:39:28,912 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] [2023-08-29 19:39:28,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-29 19:39:28,912 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-08-29 19:39:28,912 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:39:28,913 INFO L85 PathProgramCache]: Analyzing trace with hash 138273493, now seen corresponding path program 1 times [2023-08-29 19:39:28,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:39:28,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838540751] [2023-08-29 19:39:28,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:39:28,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:39:28,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:39:29,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:39:29,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:39:29,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838540751] [2023-08-29 19:39:29,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838540751] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:39:29,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:39:29,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-29 19:39:29,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138323645] [2023-08-29 19:39:29,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:39:29,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-29 19:39:29,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:39:29,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-29 19:39:29,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2023-08-29 19:39:30,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 391 [2023-08-29 19:39:30,315 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) [2023-08-29 19:39:30,315 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:39:30,315 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 391 [2023-08-29 19:39:30,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:39:30,521 INFO L130 PetriNetUnfolder]: 448/833 cut-off events. [2023-08-29 19:39:30,522 INFO L131 PetriNetUnfolder]: For 376/376 co-relation queries the response was YES. [2023-08-29 19:39:30,523 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. [2023-08-29 19:39:30,524 INFO L137 encePairwiseOnDemand]: 377/391 looper letters, 49 selfloop transitions, 20 changer transitions 0/77 dead transitions. [2023-08-29 19:39:30,530 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 77 transitions, 519 flow [2023-08-29 19:39:30,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-29 19:39:30,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-29 19:39:30,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1974 transitions. [2023-08-29 19:39:30,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4589630318530574 [2023-08-29 19:39:30,533 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1974 transitions. [2023-08-29 19:39:30,533 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1974 transitions. [2023-08-29 19:39:30,534 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:39:30,534 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1974 transitions. [2023-08-29 19:39:30,536 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) [2023-08-29 19:39:30,539 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) [2023-08-29 19:39:30,540 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) [2023-08-29 19:39:30,540 INFO L175 Difference]: Start difference. First operand has 78 places, 68 transitions, 335 flow. Second operand 11 states and 1974 transitions. [2023-08-29 19:39:30,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 77 transitions, 519 flow [2023-08-29 19:39:30,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 77 transitions, 488 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-08-29 19:39:30,542 INFO L231 Difference]: Finished difference. Result has 82 places, 69 transitions, 373 flow [2023-08-29 19:39:30,542 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} [2023-08-29 19:39:30,542 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -19 predicate places. [2023-08-29 19:39:30,543 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 69 transitions, 373 flow [2023-08-29 19:39:30,543 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) [2023-08-29 19:39:30,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:39:30,543 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] [2023-08-29 19:39:30,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-29 19:39:30,544 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-08-29 19:39:30,544 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:39:30,544 INFO L85 PathProgramCache]: Analyzing trace with hash -8493953, now seen corresponding path program 1 times [2023-08-29 19:39:30,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:39:30,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721056012] [2023-08-29 19:39:30,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:39:30,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:39:30,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:39:30,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:39:30,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:39:30,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721056012] [2023-08-29 19:39:30,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721056012] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:39:30,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:39:30,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-29 19:39:30,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895478754] [2023-08-29 19:39:30,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:39:30,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-29 19:39:30,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:39:30,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-29 19:39:30,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2023-08-29 19:39:31,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 391 [2023-08-29 19:39:31,736 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) [2023-08-29 19:39:31,736 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:39:31,736 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 391 [2023-08-29 19:39:31,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:39:31,911 INFO L130 PetriNetUnfolder]: 442/826 cut-off events. [2023-08-29 19:39:31,912 INFO L131 PetriNetUnfolder]: For 402/402 co-relation queries the response was YES. [2023-08-29 19:39:31,912 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. [2023-08-29 19:39:31,914 INFO L137 encePairwiseOnDemand]: 377/391 looper letters, 49 selfloop transitions, 21 changer transitions 0/79 dead transitions. [2023-08-29 19:39:31,914 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 79 transitions, 568 flow [2023-08-29 19:39:31,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-29 19:39:31,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-29 19:39:31,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2322 transitions. [2023-08-29 19:39:31,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45681684044855403 [2023-08-29 19:39:31,917 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2322 transitions. [2023-08-29 19:39:31,917 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2322 transitions. [2023-08-29 19:39:31,918 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:39:31,918 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2322 transitions. [2023-08-29 19:39:31,921 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) [2023-08-29 19:39:31,924 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) [2023-08-29 19:39:31,925 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) [2023-08-29 19:39:31,925 INFO L175 Difference]: Start difference. First operand has 82 places, 69 transitions, 373 flow. Second operand 13 states and 2322 transitions. [2023-08-29 19:39:31,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 79 transitions, 568 flow [2023-08-29 19:39:31,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 79 transitions, 537 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-08-29 19:39:31,927 INFO L231 Difference]: Finished difference. Result has 88 places, 70 transitions, 413 flow [2023-08-29 19:39:31,927 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} [2023-08-29 19:39:31,928 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -13 predicate places. [2023-08-29 19:39:31,928 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 70 transitions, 413 flow [2023-08-29 19:39:31,928 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) [2023-08-29 19:39:31,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:39:31,929 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] [2023-08-29 19:39:31,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-29 19:39:31,929 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-08-29 19:39:31,929 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:39:31,929 INFO L85 PathProgramCache]: Analyzing trace with hash -263312089, now seen corresponding path program 1 times [2023-08-29 19:39:31,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:39:31,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196052164] [2023-08-29 19:39:31,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:39:31,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:39:31,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:39:32,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:39:32,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:39:32,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196052164] [2023-08-29 19:39:32,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196052164] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:39:32,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:39:32,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-29 19:39:32,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464696352] [2023-08-29 19:39:32,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:39:32,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-29 19:39:32,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:39:32,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-29 19:39:32,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2023-08-29 19:39:33,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 391 [2023-08-29 19:39:33,082 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) [2023-08-29 19:39:33,082 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:39:33,082 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 391 [2023-08-29 19:39:33,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:39:33,254 INFO L130 PetriNetUnfolder]: 442/825 cut-off events. [2023-08-29 19:39:33,254 INFO L131 PetriNetUnfolder]: For 434/434 co-relation queries the response was YES. [2023-08-29 19:39:33,255 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. [2023-08-29 19:39:33,257 INFO L137 encePairwiseOnDemand]: 378/391 looper letters, 44 selfloop transitions, 22 changer transitions 0/75 dead transitions. [2023-08-29 19:39:33,257 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 75 transitions, 565 flow [2023-08-29 19:39:33,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-29 19:39:33,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-29 19:39:33,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2142 transitions. [2023-08-29 19:39:33,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45652173913043476 [2023-08-29 19:39:33,261 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2142 transitions. [2023-08-29 19:39:33,261 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2142 transitions. [2023-08-29 19:39:33,262 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:39:33,262 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2142 transitions. [2023-08-29 19:39:33,265 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) [2023-08-29 19:39:33,268 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) [2023-08-29 19:39:33,269 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) [2023-08-29 19:39:33,269 INFO L175 Difference]: Start difference. First operand has 88 places, 70 transitions, 413 flow. Second operand 12 states and 2142 transitions. [2023-08-29 19:39:33,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 75 transitions, 565 flow [2023-08-29 19:39:33,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 75 transitions, 509 flow, removed 0 selfloop flow, removed 14 redundant places. [2023-08-29 19:39:33,271 INFO L231 Difference]: Finished difference. Result has 84 places, 69 transitions, 389 flow [2023-08-29 19:39:33,272 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} [2023-08-29 19:39:33,272 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -17 predicate places. [2023-08-29 19:39:33,272 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 69 transitions, 389 flow [2023-08-29 19:39:33,273 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) [2023-08-29 19:39:33,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:39:33,273 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] [2023-08-29 19:39:33,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-29 19:39:33,273 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-08-29 19:39:33,274 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:39:33,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1357972025, now seen corresponding path program 1 times [2023-08-29 19:39:33,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:39:33,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816578321] [2023-08-29 19:39:33,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:39:33,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:39:33,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 19:39:33,340 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-29 19:39:33,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 19:39:33,414 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-29 19:39:33,415 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-29 19:39:33,415 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK (72 of 73 remaining) [2023-08-29 19:39:33,416 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (71 of 73 remaining) [2023-08-29 19:39:33,417 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (70 of 73 remaining) [2023-08-29 19:39:33,417 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (69 of 73 remaining) [2023-08-29 19:39:33,417 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (68 of 73 remaining) [2023-08-29 19:39:33,417 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (67 of 73 remaining) [2023-08-29 19:39:33,417 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (66 of 73 remaining) [2023-08-29 19:39:33,417 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (65 of 73 remaining) [2023-08-29 19:39:33,417 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (64 of 73 remaining) [2023-08-29 19:39:33,418 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (63 of 73 remaining) [2023-08-29 19:39:33,418 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (62 of 73 remaining) [2023-08-29 19:39:33,418 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (61 of 73 remaining) [2023-08-29 19:39:33,418 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (60 of 73 remaining) [2023-08-29 19:39:33,418 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 73 remaining) [2023-08-29 19:39:33,419 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (58 of 73 remaining) [2023-08-29 19:39:33,419 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 73 remaining) [2023-08-29 19:39:33,419 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 73 remaining) [2023-08-29 19:39:33,419 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (55 of 73 remaining) [2023-08-29 19:39:33,420 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 73 remaining) [2023-08-29 19:39:33,420 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 73 remaining) [2023-08-29 19:39:33,420 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 73 remaining) [2023-08-29 19:39:33,420 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (51 of 73 remaining) [2023-08-29 19:39:33,420 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err6INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (50 of 73 remaining) [2023-08-29 19:39:33,420 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err7INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (49 of 73 remaining) [2023-08-29 19:39:33,420 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err8INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (48 of 73 remaining) [2023-08-29 19:39:33,420 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err10INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (47 of 73 remaining) [2023-08-29 19:39:33,421 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 73 remaining) [2023-08-29 19:39:33,421 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 73 remaining) [2023-08-29 19:39:33,421 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 73 remaining) [2023-08-29 19:39:33,421 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 73 remaining) [2023-08-29 19:39:33,421 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 73 remaining) [2023-08-29 19:39:33,421 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 73 remaining) [2023-08-29 19:39:33,421 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 73 remaining) [2023-08-29 19:39:33,421 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 73 remaining) [2023-08-29 19:39:33,421 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 73 remaining) [2023-08-29 19:39:33,422 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 73 remaining) [2023-08-29 19:39:33,422 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 73 remaining) [2023-08-29 19:39:33,422 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 73 remaining) [2023-08-29 19:39:33,422 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (34 of 73 remaining) [2023-08-29 19:39:33,422 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (33 of 73 remaining) [2023-08-29 19:39:33,422 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 73 remaining) [2023-08-29 19:39:33,422 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 73 remaining) [2023-08-29 19:39:33,422 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 73 remaining) [2023-08-29 19:39:33,423 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 73 remaining) [2023-08-29 19:39:33,423 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 73 remaining) [2023-08-29 19:39:33,423 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 73 remaining) [2023-08-29 19:39:33,423 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 73 remaining) [2023-08-29 19:39:33,423 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 73 remaining) [2023-08-29 19:39:33,423 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 73 remaining) [2023-08-29 19:39:33,423 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 73 remaining) [2023-08-29 19:39:33,424 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 73 remaining) [2023-08-29 19:39:33,424 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 73 remaining) [2023-08-29 19:39:33,424 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 73 remaining) [2023-08-29 19:39:33,424 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 73 remaining) [2023-08-29 19:39:33,424 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 73 remaining) [2023-08-29 19:39:33,424 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 73 remaining) [2023-08-29 19:39:33,424 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 73 remaining) [2023-08-29 19:39:33,424 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 73 remaining) [2023-08-29 19:39:33,424 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 73 remaining) [2023-08-29 19:39:33,425 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 73 remaining) [2023-08-29 19:39:33,425 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Thread1of1ForFork2Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 73 remaining) [2023-08-29 19:39:33,425 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Thread1of1ForFork2Err2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (11 of 73 remaining) [2023-08-29 19:39:33,425 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Thread1of1ForFork2Err4INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (10 of 73 remaining) [2023-08-29 19:39:33,425 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Thread1of1ForFork2Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 73 remaining) [2023-08-29 19:39:33,425 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Thread1of1ForFork2Err9INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 73 remaining) [2023-08-29 19:39:33,425 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 73 remaining) [2023-08-29 19:39:33,425 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 73 remaining) [2023-08-29 19:39:33,426 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 73 remaining) [2023-08-29 19:39:33,426 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 73 remaining) [2023-08-29 19:39:33,426 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 73 remaining) [2023-08-29 19:39:33,426 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 73 remaining) [2023-08-29 19:39:33,426 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 73 remaining) [2023-08-29 19:39:33,426 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 73 remaining) [2023-08-29 19:39:33,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-29 19:39:33,427 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] [2023-08-29 19:39:33,431 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-29 19:39:33,431 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-29 19:39:33,508 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.08 07:39:33 BasicIcfg [2023-08-29 19:39:33,511 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-29 19:39:33,511 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-08-29 19:39:33,511 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-08-29 19:39:33,511 INFO L275 PluginConnector]: Witness Printer initialized [2023-08-29 19:39:33,512 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 07:39:09" (3/4) ... [2023-08-29 19:39:33,513 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-08-29 19:39:33,513 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-08-29 19:39:33,514 INFO L158 Benchmark]: Toolchain (without parser) took 25055.54ms. Allocated memory was 90.2MB in the beginning and 3.5GB in the end (delta: 3.4GB). Free memory was 65.8MB in the beginning and 2.8GB in the end (delta: -2.8GB). Peak memory consumption was 645.6MB. Max. memory is 16.1GB. [2023-08-29 19:39:33,514 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 56.6MB. Free memory is still 34.2MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-29 19:39:33,514 INFO L158 Benchmark]: CACSL2BoogieTranslator took 484.78ms. Allocated memory is still 90.2MB. Free memory was 65.5MB in the beginning and 53.4MB in the end (delta: 12.1MB). Peak memory consumption was 24.9MB. Max. memory is 16.1GB. [2023-08-29 19:39:33,514 INFO L158 Benchmark]: Boogie Procedure Inliner took 41.08ms. Allocated memory is still 90.2MB. Free memory was 53.4MB in the beginning and 51.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-29 19:39:33,515 INFO L158 Benchmark]: Boogie Preprocessor took 18.94ms. Allocated memory is still 90.2MB. Free memory was 51.3MB in the beginning and 49.6MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-29 19:39:33,515 INFO L158 Benchmark]: RCFGBuilder took 502.20ms. Allocated memory was 90.2MB in the beginning and 111.1MB in the end (delta: 21.0MB). Free memory was 49.6MB in the beginning and 75.8MB in the end (delta: -26.2MB). Peak memory consumption was 12.4MB. Max. memory is 16.1GB. [2023-08-29 19:39:33,516 INFO L158 Benchmark]: TraceAbstraction took 24000.52ms. Allocated memory was 111.1MB in the beginning and 3.5GB in the end (delta: 3.4GB). Free memory was 74.8MB in the beginning and 2.8GB in the end (delta: -2.7GB). Peak memory consumption was 631.3MB. Max. memory is 16.1GB. [2023-08-29 19:39:33,517 INFO L158 Benchmark]: Witness Printer took 2.35ms. Allocated memory is still 3.5GB. Free memory was 2.8GB in the beginning and 2.8GB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-29 19:39:33,518 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 56.6MB. Free memory is still 34.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 484.78ms. Allocated memory is still 90.2MB. Free memory was 65.5MB in the beginning and 53.4MB in the end (delta: 12.1MB). Peak memory consumption was 24.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 41.08ms. Allocated memory is still 90.2MB. Free memory was 53.4MB in the beginning and 51.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 18.94ms. Allocated memory is still 90.2MB. Free memory was 51.3MB in the beginning and 49.6MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 502.20ms. Allocated memory was 90.2MB in the beginning and 111.1MB in the end (delta: 21.0MB). Free memory was 49.6MB in the beginning and 75.8MB in the end (delta: -26.2MB). Peak memory consumption was 12.4MB. Max. memory is 16.1GB. * TraceAbstraction took 24000.52ms. Allocated memory was 111.1MB in the beginning and 3.5GB in the end (delta: 3.4GB). Free memory was 74.8MB in the beginning and 2.8GB in the end (delta: -2.7GB). Peak memory consumption was 631.3MB. Max. memory is 16.1GB. * Witness Printer took 2.35ms. Allocated memory is still 3.5GB. Free memory was 2.8GB in the beginning and 2.8GB 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: 3.3s, 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: 23.8s, OverallIterations: 20, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 16.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.4s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 9664 SdHoareTripleChecker+Valid, 7.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 6946 mSDsluCounter, 1697 SdHoareTripleChecker+Invalid, 5.7s 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, 1.0s 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: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 3.4s 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 [2023-08-29 19:39:33,550 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with 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 AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 19:39:35,406 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 19:39:35,407 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 19:39:35,435 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 19:39:35,435 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 19:39:35,438 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 19:39:35,441 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 19:39:35,443 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 19:39:35,444 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 19:39:35,448 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 19:39:35,448 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 19:39:35,450 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 19:39:35,450 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 19:39:35,452 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 19:39:35,454 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 19:39:35,457 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 19:39:35,457 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 19:39:35,458 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 19:39:35,460 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 19:39:35,464 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 19:39:35,464 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 19:39:35,465 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 19:39:35,467 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 19:39:35,468 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 19:39:35,473 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 19:39:35,473 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 19:39:35,473 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 19:39:35,475 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 19:39:35,475 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 19:39:35,476 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 19:39:35,476 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 19:39:35,480 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 19:39:35,481 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 19:39:35,482 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 19:39:35,482 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 19:39:35,483 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 19:39:35,483 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 19:39:35,483 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 19:39:35,484 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 19:39:35,484 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 19:39:35,485 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 19:39:35,486 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-29 19:39:35,515 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 19:39:35,515 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 19:39:35,515 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 19:39:35,515 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 19:39:35,516 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 19:39:35,516 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 19:39:35,517 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 19:39:35,517 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 19:39:35,517 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 19:39:35,517 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 19:39:35,517 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 19:39:35,517 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 19:39:35,524 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 19:39:35,525 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 19:39:35,525 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 19:39:35,525 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 19:39:35,525 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 19:39:35,525 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 19:39:35,526 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 19:39:35,526 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 19:39:35,526 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-29 19:39:35,526 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-29 19:39:35,526 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 19:39:35,526 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 19:39:35,526 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 19:39:35,527 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 19:39:35,527 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 19:39:35,527 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 19:39:35,527 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 19:39:35,527 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 19:39:35,527 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-29 19:39:35,528 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-29 19:39:35,528 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 19:39:35,528 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 19:39:35,528 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 19:39:35,528 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-29 19:39:35,528 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 19:39:35,528 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9556b3eb7217f056a72a299bf0514e64606a248fa454b59dcc03e4a2e74c7c90 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 19:39:35,767 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 19:39:35,783 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 19:39:35,785 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 19:39:35,786 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 19:39:35,786 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 19:39:35,787 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/singleton_with-uninit-problems.i [2023-08-29 19:39:36,743 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 19:39:36,952 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 19:39:36,953 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/singleton_with-uninit-problems.i [2023-08-29 19:39:36,964 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/464b50bcd/bb74914bbe6942aea40ec95d69941ceb/FLAG40a7b5103 [2023-08-29 19:39:36,974 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/464b50bcd/bb74914bbe6942aea40ec95d69941ceb [2023-08-29 19:39:36,976 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 19:39:36,977 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 19:39:36,977 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 19:39:36,977 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 19:39:36,979 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 19:39:36,980 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 07:39:36" (1/1) ... [2023-08-29 19:39:36,981 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f47023b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:39:36, skipping insertion in model container [2023-08-29 19:39:36,981 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 07:39:36" (1/1) ... [2023-08-29 19:39:36,985 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 19:39:37,012 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 19:39:37,138 WARN L633 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-29 19:39:37,311 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] [2023-08-29 19:39:37,327 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 19:39:37,340 INFO L203 MainTranslator]: Completed pre-run [2023-08-29 19:39:37,360 WARN L633 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-29 19:39:37,400 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] [2023-08-29 19:39:37,406 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 19:39:37,445 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-29 19:39:37,445 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-29 19:39:37,445 WARN L667 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-08-29 19:39:37,450 INFO L208 MainTranslator]: Completed translation [2023-08-29 19:39:37,450 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:39:37 WrapperNode [2023-08-29 19:39:37,450 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 19:39:37,451 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-29 19:39:37,451 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-29 19:39:37,451 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-29 19:39:37,456 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:39:37" (1/1) ... [2023-08-29 19:39:37,473 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:39:37" (1/1) ... [2023-08-29 19:39:37,486 INFO L138 Inliner]: procedures = 328, calls = 53, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 42 [2023-08-29 19:39:37,486 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-29 19:39:37,487 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-29 19:39:37,487 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-29 19:39:37,487 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-29 19:39:37,496 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:39:37" (1/1) ... [2023-08-29 19:39:37,496 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:39:37" (1/1) ... [2023-08-29 19:39:37,499 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:39:37" (1/1) ... [2023-08-29 19:39:37,499 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:39:37" (1/1) ... [2023-08-29 19:39:37,513 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:39:37" (1/1) ... [2023-08-29 19:39:37,515 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:39:37" (1/1) ... [2023-08-29 19:39:37,516 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:39:37" (1/1) ... [2023-08-29 19:39:37,517 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:39:37" (1/1) ... [2023-08-29 19:39:37,520 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-29 19:39:37,529 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-29 19:39:37,529 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-29 19:39:37,529 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-29 19:39:37,530 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:39:37" (1/1) ... [2023-08-29 19:39:37,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 19:39:37,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:39:37,558 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) [2023-08-29 19:39:37,578 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 [2023-08-29 19:39:37,586 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2023-08-29 19:39:37,587 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-29 19:39:37,587 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-29 19:39:37,587 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-29 19:39:37,587 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2023-08-29 19:39:37,587 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-29 19:39:37,587 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-29 19:39:37,588 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-29 19:39:37,588 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-29 19:39:37,588 INFO L130 BoogieDeclarations]: Found specification of procedure thread0 [2023-08-29 19:39:37,588 INFO L138 BoogieDeclarations]: Found implementation of procedure thread0 [2023-08-29 19:39:37,588 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-29 19:39:37,588 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-29 19:39:37,588 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-29 19:39:37,588 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-29 19:39:37,589 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-29 19:39:37,589 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-29 19:39:37,589 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-29 19:39:37,589 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-29 19:39:37,590 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-29 19:39:37,590 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-29 19:39:37,591 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-29 19:39:37,755 INFO L236 CfgBuilder]: Building ICFG [2023-08-29 19:39:37,757 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-29 19:39:38,007 INFO L277 CfgBuilder]: Performing block encoding [2023-08-29 19:39:38,012 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-29 19:39:38,013 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-08-29 19:39:38,014 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 07:39:38 BoogieIcfgContainer [2023-08-29 19:39:38,014 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-29 19:39:38,016 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-29 19:39:38,016 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-29 19:39:38,018 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-29 19:39:38,018 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 07:39:36" (1/3) ... [2023-08-29 19:39:38,019 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79816b8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 07:39:38, skipping insertion in model container [2023-08-29 19:39:38,019 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:39:37" (2/3) ... [2023-08-29 19:39:38,019 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79816b8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 07:39:38, skipping insertion in model container [2023-08-29 19:39:38,019 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 07:39:38" (3/3) ... [2023-08-29 19:39:38,020 INFO L112 eAbstractionObserver]: Analyzing ICFG singleton_with-uninit-problems.i [2023-08-29 19:39:38,031 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-29 19:39:38,032 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 34 error locations. [2023-08-29 19:39:38,032 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-29 19:39:38,157 INFO L144 ThreadInstanceAdder]: Constructed 21 joinOtherThreadTransitions. [2023-08-29 19:39:38,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 261 places, 252 transitions, 611 flow [2023-08-29 19:39:38,276 INFO L130 PetriNetUnfolder]: 7/173 cut-off events. [2023-08-29 19:39:38,276 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-29 19:39:38,282 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. [2023-08-29 19:39:38,282 INFO L82 GeneralOperation]: Start removeDead. Operand has 261 places, 252 transitions, 611 flow [2023-08-29 19:39:38,287 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 181 places, 169 transitions, 389 flow [2023-08-29 19:39:38,290 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 19:39:38,307 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 181 places, 169 transitions, 389 flow [2023-08-29 19:39:38,310 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 181 places, 169 transitions, 389 flow [2023-08-29 19:39:38,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 181 places, 169 transitions, 389 flow [2023-08-29 19:39:38,356 INFO L130 PetriNetUnfolder]: 7/169 cut-off events. [2023-08-29 19:39:38,356 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-29 19:39:38,357 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. [2023-08-29 19:39:38,360 INFO L119 LiptonReduction]: Number of co-enabled transitions 2920 [2023-08-29 19:39:46,046 INFO L134 LiptonReduction]: Checked pairs total: 6789 [2023-08-29 19:39:46,046 INFO L136 LiptonReduction]: Total number of compositions: 141 [2023-08-29 19:39:46,055 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 19:39:46,058 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;@57a8c2c7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 19:39:46,059 INFO L358 AbstractCegarLoop]: Starting to check reachability of 73 error locations. [2023-08-29 19:39:46,059 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2023-08-29 19:39:46,060 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 19:39:46,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:39:46,060 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-29 19:39:46,060 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-08-29 19:39:46,063 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:39:46,063 INFO L85 PathProgramCache]: Analyzing trace with hash 647, now seen corresponding path program 1 times [2023-08-29 19:39:46,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 19:39:46,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1233950065] [2023-08-29 19:39:46,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:39:46,074 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 [2023-08-29 19:39:46,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 19:39:46,077 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) [2023-08-29 19:39:46,082 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 [2023-08-29 19:39:46,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:39:46,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 3 conjuncts, 1 conjunts are in the unsatisfiable core [2023-08-29 19:39:46,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:39:46,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:39:46,140 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 19:39:46,141 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 19:39:46,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1233950065] [2023-08-29 19:39:46,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1233950065] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:39:46,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:39:46,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-29 19:39:46,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847967103] [2023-08-29 19:39:46,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:39:46,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-29 19:39:46,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 19:39:46,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-29 19:39:46,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-29 19:39:46,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 395 [2023-08-29 19:39:46,167 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) [2023-08-29 19:39:46,167 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:39:46,167 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 395 [2023-08-29 19:39:46,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:39:48,234 INFO L130 PetriNetUnfolder]: 19442/26684 cut-off events. [2023-08-29 19:39:48,248 INFO L131 PetriNetUnfolder]: For 721/721 co-relation queries the response was YES. [2023-08-29 19:39:48,297 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. [2023-08-29 19:39:48,509 INFO L137 encePairwiseOnDemand]: 391/395 looper letters, 65 selfloop transitions, 0 changer transitions 0/83 dead transitions. [2023-08-29 19:39:48,510 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 83 transitions, 347 flow [2023-08-29 19:39:48,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-29 19:39:48,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-29 19:39:48,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 511 transitions. [2023-08-29 19:39:48,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6468354430379747 [2023-08-29 19:39:48,530 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 511 transitions. [2023-08-29 19:39:48,532 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 511 transitions. [2023-08-29 19:39:48,535 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:39:48,537 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 511 transitions. [2023-08-29 19:39:48,541 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) [2023-08-29 19:39:48,545 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) [2023-08-29 19:39:48,545 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) [2023-08-29 19:39:48,547 INFO L175 Difference]: Start difference. First operand has 101 places, 87 transitions, 225 flow. Second operand 2 states and 511 transitions. [2023-08-29 19:39:48,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 83 transitions, 347 flow [2023-08-29 19:39:48,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 83 transitions, 313 flow, removed 0 selfloop flow, removed 12 redundant places. [2023-08-29 19:39:48,595 INFO L231 Difference]: Finished difference. Result has 86 places, 83 transitions, 183 flow [2023-08-29 19:39:48,600 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} [2023-08-29 19:39:48,605 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -15 predicate places. [2023-08-29 19:39:48,605 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 83 transitions, 183 flow [2023-08-29 19:39:48,606 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) [2023-08-29 19:39:48,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:39:48,606 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 19:39:48,622 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 (2)] Ended with exit code 0 [2023-08-29 19:39:48,813 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 [2023-08-29 19:39:48,813 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-08-29 19:39:48,821 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:39:48,821 INFO L85 PathProgramCache]: Analyzing trace with hash 637139, now seen corresponding path program 1 times [2023-08-29 19:39:48,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 19:39:48,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [20598239] [2023-08-29 19:39:48,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:39:48,824 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 [2023-08-29 19:39:48,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 19:39:48,825 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) [2023-08-29 19:39:48,828 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 [2023-08-29 19:39:48,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:39:48,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-29 19:39:48,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:39:48,938 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 [2023-08-29 19:39:48,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:39:48,952 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 19:39:48,952 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 19:39:48,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [20598239] [2023-08-29 19:39:48,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [20598239] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:39:48,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:39:48,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 19:39:48,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185433237] [2023-08-29 19:39:48,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:39:48,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:39:48,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 19:39:48,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:39:48,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:39:49,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 395 [2023-08-29 19:39:49,186 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) [2023-08-29 19:39:49,186 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:39:49,186 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 395 [2023-08-29 19:39:49,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:39:50,540 INFO L130 PetriNetUnfolder]: 19430/26659 cut-off events. [2023-08-29 19:39:50,540 INFO L131 PetriNetUnfolder]: For 85/85 co-relation queries the response was YES. [2023-08-29 19:39:50,559 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. [2023-08-29 19:39:50,646 INFO L137 encePairwiseOnDemand]: 392/395 looper letters, 68 selfloop transitions, 2 changer transitions 0/88 dead transitions. [2023-08-29 19:39:50,646 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 88 transitions, 333 flow [2023-08-29 19:39:50,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:39:50,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:39:50,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 716 transitions. [2023-08-29 19:39:50,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6042194092827005 [2023-08-29 19:39:50,649 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 716 transitions. [2023-08-29 19:39:50,649 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 716 transitions. [2023-08-29 19:39:50,650 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:39:50,650 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 716 transitions. [2023-08-29 19:39:50,651 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) [2023-08-29 19:39:50,653 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) [2023-08-29 19:39:50,654 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) [2023-08-29 19:39:50,654 INFO L175 Difference]: Start difference. First operand has 86 places, 83 transitions, 183 flow. Second operand 3 states and 716 transitions. [2023-08-29 19:39:50,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 88 transitions, 333 flow [2023-08-29 19:39:50,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 88 transitions, 333 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 19:39:50,657 INFO L231 Difference]: Finished difference. Result has 89 places, 83 transitions, 191 flow [2023-08-29 19:39:50,658 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} [2023-08-29 19:39:50,658 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -12 predicate places. [2023-08-29 19:39:50,658 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 83 transitions, 191 flow [2023-08-29 19:39:50,659 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) [2023-08-29 19:39:50,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:39:50,660 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 19:39:50,680 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 (3)] Ended with exit code 0 [2023-08-29 19:39:50,866 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 [2023-08-29 19:39:50,867 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-08-29 19:39:50,867 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:39:50,867 INFO L85 PathProgramCache]: Analyzing trace with hash 637138, now seen corresponding path program 1 times [2023-08-29 19:39:50,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 19:39:50,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1647024489] [2023-08-29 19:39:50,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:39:50,868 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 [2023-08-29 19:39:50,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 19:39:50,869 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) [2023-08-29 19:39:50,871 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 [2023-08-29 19:39:50,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:39:50,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-29 19:39:50,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:39:50,928 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 [2023-08-29 19:39:50,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:39:50,933 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 19:39:50,933 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 19:39:50,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1647024489] [2023-08-29 19:39:50,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1647024489] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:39:50,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:39:50,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 19:39:50,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431996123] [2023-08-29 19:39:50,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:39:50,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:39:50,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 19:39:50,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:39:50,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:39:51,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 395 [2023-08-29 19:39:51,087 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) [2023-08-29 19:39:51,087 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:39:51,087 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 395 [2023-08-29 19:39:51,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:39:52,311 INFO L130 PetriNetUnfolder]: 14207/19641 cut-off events. [2023-08-29 19:39:52,311 INFO L131 PetriNetUnfolder]: For 1527/1527 co-relation queries the response was YES. [2023-08-29 19:39:52,325 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. [2023-08-29 19:39:52,376 INFO L137 encePairwiseOnDemand]: 386/395 looper letters, 68 selfloop transitions, 8 changer transitions 0/94 dead transitions. [2023-08-29 19:39:52,377 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 94 transitions, 368 flow [2023-08-29 19:39:52,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:39:52,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:39:52,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 686 transitions. [2023-08-29 19:39:52,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5789029535864979 [2023-08-29 19:39:52,379 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 686 transitions. [2023-08-29 19:39:52,379 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 686 transitions. [2023-08-29 19:39:52,380 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:39:52,380 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 686 transitions. [2023-08-29 19:39:52,381 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) [2023-08-29 19:39:52,383 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) [2023-08-29 19:39:52,384 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) [2023-08-29 19:39:52,384 INFO L175 Difference]: Start difference. First operand has 89 places, 83 transitions, 191 flow. Second operand 3 states and 686 transitions. [2023-08-29 19:39:52,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 94 transitions, 368 flow [2023-08-29 19:39:52,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 94 transitions, 364 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:39:52,389 INFO L231 Difference]: Finished difference. Result has 91 places, 89 transitions, 245 flow [2023-08-29 19:39:52,390 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} [2023-08-29 19:39:52,391 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -10 predicate places. [2023-08-29 19:39:52,391 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 89 transitions, 245 flow [2023-08-29 19:39:52,392 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) [2023-08-29 19:39:52,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:39:52,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:39:52,398 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 (4)] Forceful destruction successful, exit code 0 [2023-08-29 19:39:52,598 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 [2023-08-29 19:39:52,599 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-08-29 19:39:52,599 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:39:52,599 INFO L85 PathProgramCache]: Analyzing trace with hash -64964974, now seen corresponding path program 1 times [2023-08-29 19:39:52,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 19:39:52,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1422919017] [2023-08-29 19:39:52,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:39:52,600 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 [2023-08-29 19:39:52,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 19:39:52,601 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) [2023-08-29 19:39:52,605 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 [2023-08-29 19:39:52,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:39:52,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-29 19:39:52,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:39:52,678 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 [2023-08-29 19:39:52,700 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-29 19:39:52,700 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 [2023-08-29 19:39:52,780 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2023-08-29 19:39:52,780 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 [2023-08-29 19:39:52,901 INFO L321 Elim1Store]: treesize reduction 66, result has 34.0 percent of original size [2023-08-29 19:39:52,902 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 [2023-08-29 19:39:52,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:39:52,938 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 19:39:52,938 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 19:39:52,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1422919017] [2023-08-29 19:39:52,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1422919017] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:39:52,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:39:52,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 19:39:52,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629371395] [2023-08-29 19:39:52,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:39:52,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 19:39:52,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 19:39:52,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 19:39:52,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-29 19:39:53,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 395 [2023-08-29 19:39:53,541 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) [2023-08-29 19:39:53,541 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:39:53,541 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 395 [2023-08-29 19:39:53,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:39:54,596 INFO L130 PetriNetUnfolder]: 14205/19632 cut-off events. [2023-08-29 19:39:54,597 INFO L131 PetriNetUnfolder]: For 2994/2994 co-relation queries the response was YES. [2023-08-29 19:39:54,644 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. [2023-08-29 19:39:54,725 INFO L137 encePairwiseOnDemand]: 389/395 looper letters, 73 selfloop transitions, 4 changer transitions 0/91 dead transitions. [2023-08-29 19:39:54,725 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 91 transitions, 411 flow [2023-08-29 19:39:54,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 19:39:54,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 19:39:54,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1053 transitions. [2023-08-29 19:39:54,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5331645569620254 [2023-08-29 19:39:54,728 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1053 transitions. [2023-08-29 19:39:54,728 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1053 transitions. [2023-08-29 19:39:54,729 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:39:54,729 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1053 transitions. [2023-08-29 19:39:54,730 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) [2023-08-29 19:39:54,733 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) [2023-08-29 19:39:54,734 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) [2023-08-29 19:39:54,734 INFO L175 Difference]: Start difference. First operand has 91 places, 89 transitions, 245 flow. Second operand 5 states and 1053 transitions. [2023-08-29 19:39:54,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 91 transitions, 411 flow [2023-08-29 19:39:54,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 91 transitions, 395 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:39:54,739 INFO L231 Difference]: Finished difference. Result has 91 places, 87 transitions, 233 flow [2023-08-29 19:39:54,739 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} [2023-08-29 19:39:54,741 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -10 predicate places. [2023-08-29 19:39:54,741 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 87 transitions, 233 flow [2023-08-29 19:39:54,741 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) [2023-08-29 19:39:54,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:39:54,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:39:54,765 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 (5)] Ended with exit code 0 [2023-08-29 19:39:54,948 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 [2023-08-29 19:39:54,948 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-08-29 19:39:54,948 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:39:54,948 INFO L85 PathProgramCache]: Analyzing trace with hash -64964973, now seen corresponding path program 1 times [2023-08-29 19:39:54,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 19:39:54,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2023779463] [2023-08-29 19:39:54,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:39:54,949 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 [2023-08-29 19:39:54,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 19:39:54,950 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) [2023-08-29 19:39:54,952 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 [2023-08-29 19:39:55,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:39:55,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-29 19:39:55,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:39:55,033 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 [2023-08-29 19:39:55,037 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 [2023-08-29 19:39:55,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 19:39:55,058 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 [2023-08-29 19:39:55,074 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-29 19:39:55,074 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 [2023-08-29 19:39:55,139 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2023-08-29 19:39:55,139 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 [2023-08-29 19:39:55,149 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 [2023-08-29 19:39:55,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 19:39:55,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 19:39:55,238 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 [2023-08-29 19:39:55,303 INFO L321 Elim1Store]: treesize reduction 18, result has 41.9 percent of original size [2023-08-29 19:39:55,303 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 [2023-08-29 19:39:55,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:39:55,336 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 19:39:55,336 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 19:39:55,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2023779463] [2023-08-29 19:39:55,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2023779463] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:39:55,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:39:55,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-29 19:39:55,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550275108] [2023-08-29 19:39:55,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:39:55,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 19:39:55,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 19:39:55,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 19:39:55,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-29 19:39:56,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 395 [2023-08-29 19:39:56,083 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) [2023-08-29 19:39:56,083 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:39:56,083 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 395 [2023-08-29 19:39:56,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:39:57,150 INFO L130 PetriNetUnfolder]: 14199/19619 cut-off events. [2023-08-29 19:39:57,150 INFO L131 PetriNetUnfolder]: For 2987/2987 co-relation queries the response was YES. [2023-08-29 19:39:57,173 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. [2023-08-29 19:39:57,240 INFO L137 encePairwiseOnDemand]: 388/395 looper letters, 72 selfloop transitions, 6 changer transitions 0/92 dead transitions. [2023-08-29 19:39:57,240 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 92 transitions, 413 flow [2023-08-29 19:39:57,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 19:39:57,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 19:39:57,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1226 transitions. [2023-08-29 19:39:57,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5172995780590718 [2023-08-29 19:39:57,244 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1226 transitions. [2023-08-29 19:39:57,244 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1226 transitions. [2023-08-29 19:39:57,245 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:39:57,245 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1226 transitions. [2023-08-29 19:39:57,247 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) [2023-08-29 19:39:57,249 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) [2023-08-29 19:39:57,250 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) [2023-08-29 19:39:57,250 INFO L175 Difference]: Start difference. First operand has 91 places, 87 transitions, 233 flow. Second operand 6 states and 1226 transitions. [2023-08-29 19:39:57,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 92 transitions, 413 flow [2023-08-29 19:39:57,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 92 transitions, 405 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-29 19:39:57,258 INFO L231 Difference]: Finished difference. Result has 90 places, 85 transitions, 233 flow [2023-08-29 19:39:57,258 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} [2023-08-29 19:39:57,260 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -11 predicate places. [2023-08-29 19:39:57,260 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 85 transitions, 233 flow [2023-08-29 19:39:57,261 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) [2023-08-29 19:39:57,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:39:57,261 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:39:57,269 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 [2023-08-29 19:39:57,468 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 [2023-08-29 19:39:57,469 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-08-29 19:39:57,469 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:39:57,469 INFO L85 PathProgramCache]: Analyzing trace with hash -153582422, now seen corresponding path program 1 times [2023-08-29 19:39:57,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 19:39:57,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1381777644] [2023-08-29 19:39:57,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:39:57,470 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 [2023-08-29 19:39:57,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 19:39:57,474 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) [2023-08-29 19:39:57,476 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 [2023-08-29 19:39:57,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:39:57,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-29 19:39:57,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:39:57,597 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 [2023-08-29 19:39:57,605 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 [2023-08-29 19:39:57,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 19:39:57,646 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 [2023-08-29 19:39:57,663 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-29 19:39:57,663 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 [2023-08-29 19:39:57,789 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2023-08-29 19:39:57,790 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 [2023-08-29 19:39:57,802 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 [2023-08-29 19:39:57,901 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2023-08-29 19:39:57,902 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 [2023-08-29 19:39:57,909 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 [2023-08-29 19:39:57,951 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-08-29 19:39:57,951 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 [2023-08-29 19:39:57,988 INFO L321 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2023-08-29 19:39:57,988 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 [2023-08-29 19:39:58,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 19:39:58,038 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 [2023-08-29 19:39:58,070 INFO L321 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2023-08-29 19:39:58,070 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 [2023-08-29 19:39:58,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 19:39:58,176 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 [2023-08-29 19:39:58,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:39:58,214 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 19:39:58,215 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 19:39:58,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1381777644] [2023-08-29 19:39:58,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1381777644] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:39:58,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:39:58,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 19:39:58,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024252035] [2023-08-29 19:39:58,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:39:58,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 19:39:58,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 19:39:58,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 19:39:58,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-29 19:40:00,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 395 [2023-08-29 19:40:00,594 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) [2023-08-29 19:40:00,594 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:40:00,594 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 395 [2023-08-29 19:40:00,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:40:01,710 INFO L130 PetriNetUnfolder]: 8985/12611 cut-off events. [2023-08-29 19:40:01,710 INFO L131 PetriNetUnfolder]: For 2963/2963 co-relation queries the response was YES. [2023-08-29 19:40:01,729 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. [2023-08-29 19:40:01,769 INFO L137 encePairwiseOnDemand]: 385/395 looper letters, 64 selfloop transitions, 10 changer transitions 0/89 dead transitions. [2023-08-29 19:40:01,769 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 89 transitions, 390 flow [2023-08-29 19:40:01,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 19:40:01,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 19:40:01,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1216 transitions. [2023-08-29 19:40:01,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5130801687763713 [2023-08-29 19:40:01,773 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1216 transitions. [2023-08-29 19:40:01,773 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1216 transitions. [2023-08-29 19:40:01,773 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:40:01,773 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1216 transitions. [2023-08-29 19:40:01,775 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) [2023-08-29 19:40:01,777 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) [2023-08-29 19:40:01,778 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) [2023-08-29 19:40:01,778 INFO L175 Difference]: Start difference. First operand has 90 places, 85 transitions, 233 flow. Second operand 6 states and 1216 transitions. [2023-08-29 19:40:01,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 89 transitions, 390 flow [2023-08-29 19:40:01,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 89 transitions, 376 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-29 19:40:01,780 INFO L231 Difference]: Finished difference. Result has 88 places, 84 transitions, 235 flow [2023-08-29 19:40:01,780 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} [2023-08-29 19:40:01,781 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -13 predicate places. [2023-08-29 19:40:01,781 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 84 transitions, 235 flow [2023-08-29 19:40:01,781 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) [2023-08-29 19:40:01,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:40:01,782 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:40:01,793 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 [2023-08-29 19:40:01,989 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 [2023-08-29 19:40:01,992 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread0Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-08-29 19:40:01,992 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:40:01,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1256894222, now seen corresponding path program 1 times [2023-08-29 19:40:01,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 19:40:01,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [94825135] [2023-08-29 19:40:01,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:40:01,993 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 [2023-08-29 19:40:01,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 19:40:01,995 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) [2023-08-29 19:40:01,996 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 [2023-08-29 19:40:02,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:40:02,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-29 19:40:02,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:40:02,083 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 [2023-08-29 19:40:02,100 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-29 19:40:02,101 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 [2023-08-29 19:40:02,119 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-29 19:40:02,119 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 [2023-08-29 19:40:02,137 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-29 19:40:02,137 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 [2023-08-29 19:40:02,154 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-29 19:40:02,154 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 [2023-08-29 19:40:02,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:40:02,165 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 19:40:02,166 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 19:40:02,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [94825135] [2023-08-29 19:40:02,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [94825135] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:40:02,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:40:02,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:40:02,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30726132] [2023-08-29 19:40:02,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:40:02,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:40:02,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 19:40:02,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:40:02,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:40:02,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 395 [2023-08-29 19:40:02,304 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) [2023-08-29 19:40:02,304 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:40:02,304 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 395 [2023-08-29 19:40:02,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:40:02,900 INFO L130 PetriNetUnfolder]: 7190/10302 cut-off events. [2023-08-29 19:40:02,900 INFO L131 PetriNetUnfolder]: For 1254/1254 co-relation queries the response was YES. [2023-08-29 19:40:02,907 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. [2023-08-29 19:40:02,930 INFO L137 encePairwiseOnDemand]: 391/395 looper letters, 64 selfloop transitions, 2 changer transitions 0/83 dead transitions. [2023-08-29 19:40:02,931 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 83 transitions, 367 flow [2023-08-29 19:40:02,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:40:02,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:40:02,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 674 transitions. [2023-08-29 19:40:02,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5687763713080168 [2023-08-29 19:40:02,933 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 674 transitions. [2023-08-29 19:40:02,933 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 674 transitions. [2023-08-29 19:40:02,933 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:40:02,933 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 674 transitions. [2023-08-29 19:40:02,934 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) [2023-08-29 19:40:02,936 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) [2023-08-29 19:40:02,936 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) [2023-08-29 19:40:02,936 INFO L175 Difference]: Start difference. First operand has 88 places, 84 transitions, 235 flow. Second operand 3 states and 674 transitions. [2023-08-29 19:40:02,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 83 transitions, 367 flow [2023-08-29 19:40:02,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 83 transitions, 360 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 19:40:02,938 INFO L231 Difference]: Finished difference. Result has 85 places, 82 transitions, 228 flow [2023-08-29 19:40:02,938 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} [2023-08-29 19:40:02,939 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -16 predicate places. [2023-08-29 19:40:02,939 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 82 transitions, 228 flow [2023-08-29 19:40:02,939 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) [2023-08-29 19:40:02,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:40:02,939 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:40:02,968 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 (8)] Forceful destruction successful, exit code 0 [2023-08-29 19:40:03,146 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 [2023-08-29 19:40:03,147 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread0Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-08-29 19:40:03,147 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:40:03,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1256894221, now seen corresponding path program 1 times [2023-08-29 19:40:03,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 19:40:03,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [766307051] [2023-08-29 19:40:03,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:40:03,148 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 [2023-08-29 19:40:03,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 19:40:03,149 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) [2023-08-29 19:40:03,151 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 [2023-08-29 19:40:03,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:40:03,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-29 19:40:03,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:40:03,256 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 [2023-08-29 19:40:03,261 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 [2023-08-29 19:40:03,302 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-29 19:40:03,302 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 [2023-08-29 19:40:03,307 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 [2023-08-29 19:40:03,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 19:40:03,324 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 [2023-08-29 19:40:03,340 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-29 19:40:03,341 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 [2023-08-29 19:40:03,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 19:40:03,363 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 [2023-08-29 19:40:03,373 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-29 19:40:03,373 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 [2023-08-29 19:40:03,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 19:40:03,415 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 [2023-08-29 19:40:03,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:40:03,463 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 19:40:03,464 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 19:40:03,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [766307051] [2023-08-29 19:40:03,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [766307051] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:40:03,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:40:03,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 19:40:03,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680071760] [2023-08-29 19:40:03,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:40:03,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 19:40:03,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 19:40:03,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 19:40:03,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-08-29 19:40:04,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 395 [2023-08-29 19:40:04,220 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) [2023-08-29 19:40:04,220 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:40:04,220 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 395 [2023-08-29 19:40:04,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:40:04,691 INFO L130 PetriNetUnfolder]: 5397/7995 cut-off events. [2023-08-29 19:40:04,691 INFO L131 PetriNetUnfolder]: For 996/996 co-relation queries the response was YES. [2023-08-29 19:40:04,701 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. [2023-08-29 19:40:04,726 INFO L137 encePairwiseOnDemand]: 389/395 looper letters, 61 selfloop transitions, 5 changer transitions 0/83 dead transitions. [2023-08-29 19:40:04,726 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 83 transitions, 370 flow [2023-08-29 19:40:04,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 19:40:04,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 19:40:04,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1062 transitions. [2023-08-29 19:40:04,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5377215189873418 [2023-08-29 19:40:04,731 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1062 transitions. [2023-08-29 19:40:04,731 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1062 transitions. [2023-08-29 19:40:04,731 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:40:04,732 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1062 transitions. [2023-08-29 19:40:04,733 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) [2023-08-29 19:40:04,735 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) [2023-08-29 19:40:04,735 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) [2023-08-29 19:40:04,735 INFO L175 Difference]: Start difference. First operand has 85 places, 82 transitions, 228 flow. Second operand 5 states and 1062 transitions. [2023-08-29 19:40:04,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 83 transitions, 370 flow [2023-08-29 19:40:04,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 83 transitions, 366 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:40:04,738 INFO L231 Difference]: Finished difference. Result has 85 places, 80 transitions, 230 flow [2023-08-29 19:40:04,738 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} [2023-08-29 19:40:04,739 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -16 predicate places. [2023-08-29 19:40:04,739 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 80 transitions, 230 flow [2023-08-29 19:40:04,740 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) [2023-08-29 19:40:04,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:40:04,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:40:04,750 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 (9)] Forceful destruction successful, exit code 0 [2023-08-29 19:40:04,947 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 [2023-08-29 19:40:04,948 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread0Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-08-29 19:40:04,948 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:40:04,948 INFO L85 PathProgramCache]: Analyzing trace with hash -989523521, now seen corresponding path program 1 times [2023-08-29 19:40:04,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 19:40:04,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2130950849] [2023-08-29 19:40:04,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:40:04,949 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 [2023-08-29 19:40:04,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 19:40:04,951 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) [2023-08-29 19:40:04,952 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 [2023-08-29 19:40:05,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:40:05,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 19:40:05,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:40:05,046 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 [2023-08-29 19:40:05,069 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-29 19:40:05,069 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 [2023-08-29 19:40:05,094 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-29 19:40:05,095 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 [2023-08-29 19:40:05,108 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-29 19:40:05,108 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 [2023-08-29 19:40:05,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:40:05,129 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 19:40:05,129 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 19:40:05,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2130950849] [2023-08-29 19:40:05,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2130950849] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:40:05,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:40:05,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:40:05,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724978851] [2023-08-29 19:40:05,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:40:05,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:40:05,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 19:40:05,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:40:05,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:40:05,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 395 [2023-08-29 19:40:05,276 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) [2023-08-29 19:40:05,276 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:40:05,276 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 395 [2023-08-29 19:40:05,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:40:05,700 INFO L130 PetriNetUnfolder]: 5739/8201 cut-off events. [2023-08-29 19:40:05,700 INFO L131 PetriNetUnfolder]: For 1025/1025 co-relation queries the response was YES. [2023-08-29 19:40:05,708 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. [2023-08-29 19:40:05,727 INFO L137 encePairwiseOnDemand]: 391/395 looper letters, 62 selfloop transitions, 2 changer transitions 0/79 dead transitions. [2023-08-29 19:40:05,727 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 79 transitions, 358 flow [2023-08-29 19:40:05,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:40:05,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:40:05,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 672 transitions. [2023-08-29 19:40:05,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5670886075949367 [2023-08-29 19:40:05,729 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 672 transitions. [2023-08-29 19:40:05,729 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 672 transitions. [2023-08-29 19:40:05,730 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:40:05,730 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 672 transitions. [2023-08-29 19:40:05,731 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) [2023-08-29 19:40:05,732 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) [2023-08-29 19:40:05,732 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) [2023-08-29 19:40:05,732 INFO L175 Difference]: Start difference. First operand has 85 places, 80 transitions, 230 flow. Second operand 3 states and 672 transitions. [2023-08-29 19:40:05,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 79 transitions, 358 flow [2023-08-29 19:40:05,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 79 transitions, 348 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-29 19:40:05,735 INFO L231 Difference]: Finished difference. Result has 81 places, 78 transitions, 220 flow [2023-08-29 19:40:05,735 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} [2023-08-29 19:40:05,735 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -20 predicate places. [2023-08-29 19:40:05,735 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 78 transitions, 220 flow [2023-08-29 19:40:05,736 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) [2023-08-29 19:40:05,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:40:05,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:40:05,743 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 (10)] Ended with exit code 0 [2023-08-29 19:40:05,939 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 [2023-08-29 19:40:05,940 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread0Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-08-29 19:40:05,940 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:40:05,940 INFO L85 PathProgramCache]: Analyzing trace with hash -989523523, now seen corresponding path program 1 times [2023-08-29 19:40:05,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 19:40:05,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [102253088] [2023-08-29 19:40:05,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:40:05,941 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 [2023-08-29 19:40:05,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 19:40:05,942 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) [2023-08-29 19:40:05,945 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 [2023-08-29 19:40:06,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:40:06,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-29 19:40:06,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:40:06,054 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 [2023-08-29 19:40:06,058 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 [2023-08-29 19:40:06,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 19:40:06,085 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 [2023-08-29 19:40:06,101 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-29 19:40:06,102 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 [2023-08-29 19:40:06,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 19:40:06,144 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 [2023-08-29 19:40:06,158 INFO L321 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2023-08-29 19:40:06,159 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 [2023-08-29 19:40:06,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 19:40:06,224 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 [2023-08-29 19:40:06,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:40:06,281 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 19:40:06,281 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 19:40:06,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [102253088] [2023-08-29 19:40:06,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [102253088] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:40:06,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:40:06,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-29 19:40:06,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741342054] [2023-08-29 19:40:06,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:40:06,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 19:40:06,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 19:40:06,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 19:40:06,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-29 19:40:07,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 395 [2023-08-29 19:40:07,315 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) [2023-08-29 19:40:07,315 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:40:07,315 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 395 [2023-08-29 19:40:07,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:40:08,028 INFO L130 PetriNetUnfolder]: 5731/8057 cut-off events. [2023-08-29 19:40:08,028 INFO L131 PetriNetUnfolder]: For 1022/1022 co-relation queries the response was YES. [2023-08-29 19:40:08,035 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. [2023-08-29 19:40:08,052 INFO L137 encePairwiseOnDemand]: 388/395 looper letters, 64 selfloop transitions, 6 changer transitions 0/82 dead transitions. [2023-08-29 19:40:08,052 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 82 transitions, 380 flow [2023-08-29 19:40:08,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 19:40:08,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 19:40:08,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1212 transitions. [2023-08-29 19:40:08,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5113924050632911 [2023-08-29 19:40:08,073 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1212 transitions. [2023-08-29 19:40:08,073 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1212 transitions. [2023-08-29 19:40:08,074 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:40:08,074 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1212 transitions. [2023-08-29 19:40:08,076 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) [2023-08-29 19:40:08,078 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) [2023-08-29 19:40:08,084 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) [2023-08-29 19:40:08,084 INFO L175 Difference]: Start difference. First operand has 81 places, 78 transitions, 220 flow. Second operand 6 states and 1212 transitions. [2023-08-29 19:40:08,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 82 transitions, 380 flow [2023-08-29 19:40:08,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 82 transitions, 376 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:40:08,087 INFO L231 Difference]: Finished difference. Result has 82 places, 76 transitions, 224 flow [2023-08-29 19:40:08,088 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} [2023-08-29 19:40:08,089 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -19 predicate places. [2023-08-29 19:40:08,089 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 76 transitions, 224 flow [2023-08-29 19:40:08,089 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) [2023-08-29 19:40:08,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:40:08,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:40:08,100 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 [2023-08-29 19:40:08,297 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 [2023-08-29 19:40:08,297 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-08-29 19:40:08,298 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:40:08,298 INFO L85 PathProgramCache]: Analyzing trace with hash -989523568, now seen corresponding path program 1 times [2023-08-29 19:40:08,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 19:40:08,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1575219408] [2023-08-29 19:40:08,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:40:08,299 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 [2023-08-29 19:40:08,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 19:40:08,300 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) [2023-08-29 19:40:08,302 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 [2023-08-29 19:40:08,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:40:08,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-29 19:40:08,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:40:08,386 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 [2023-08-29 19:40:08,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:40:08,395 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 19:40:08,396 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 19:40:08,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1575219408] [2023-08-29 19:40:08,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1575219408] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:40:08,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:40:08,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:40:08,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013385976] [2023-08-29 19:40:08,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:40:08,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:40:08,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 19:40:08,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:40:08,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:40:08,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 395 [2023-08-29 19:40:08,542 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) [2023-08-29 19:40:08,542 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:40:08,542 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 395 [2023-08-29 19:40:08,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:40:08,824 INFO L130 PetriNetUnfolder]: 1829/2797 cut-off events. [2023-08-29 19:40:08,824 INFO L131 PetriNetUnfolder]: For 401/401 co-relation queries the response was YES. [2023-08-29 19:40:08,827 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. [2023-08-29 19:40:08,833 INFO L137 encePairwiseOnDemand]: 388/395 looper letters, 55 selfloop transitions, 3 changer transitions 0/74 dead transitions. [2023-08-29 19:40:08,833 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 74 transitions, 338 flow [2023-08-29 19:40:08,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:40:08,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:40:08,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 644 transitions. [2023-08-29 19:40:08,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5434599156118144 [2023-08-29 19:40:08,835 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 644 transitions. [2023-08-29 19:40:08,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 644 transitions. [2023-08-29 19:40:08,835 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:40:08,836 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 644 transitions. [2023-08-29 19:40:08,836 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) [2023-08-29 19:40:08,838 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) [2023-08-29 19:40:08,838 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) [2023-08-29 19:40:08,838 INFO L175 Difference]: Start difference. First operand has 82 places, 76 transitions, 224 flow. Second operand 3 states and 644 transitions. [2023-08-29 19:40:08,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 74 transitions, 338 flow [2023-08-29 19:40:08,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 74 transitions, 326 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-29 19:40:08,840 INFO L231 Difference]: Finished difference. Result has 75 places, 72 transitions, 210 flow [2023-08-29 19:40:08,840 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} [2023-08-29 19:40:08,840 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -26 predicate places. [2023-08-29 19:40:08,840 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 72 transitions, 210 flow [2023-08-29 19:40:08,841 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) [2023-08-29 19:40:08,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:40:08,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:40:08,847 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 (12)] Forceful destruction successful, exit code 0 [2023-08-29 19:40:09,041 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 [2023-08-29 19:40:09,041 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-08-29 19:40:09,042 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:40:09,042 INFO L85 PathProgramCache]: Analyzing trace with hash -989523569, now seen corresponding path program 1 times [2023-08-29 19:40:09,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 19:40:09,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [12697546] [2023-08-29 19:40:09,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:40:09,043 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 [2023-08-29 19:40:09,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 19:40:09,059 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) [2023-08-29 19:40:09,060 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 [2023-08-29 19:40:09,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:40:09,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-29 19:40:09,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:40:09,139 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 [2023-08-29 19:40:09,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:40:09,158 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 19:40:09,158 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 19:40:09,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [12697546] [2023-08-29 19:40:09,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [12697546] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:40:09,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:40:09,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:40:09,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482191854] [2023-08-29 19:40:09,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:40:09,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:40:09,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 19:40:09,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:40:09,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:40:09,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 395 [2023-08-29 19:40:09,341 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) [2023-08-29 19:40:09,341 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:40:09,341 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 395 [2023-08-29 19:40:09,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:40:09,471 INFO L130 PetriNetUnfolder]: 417/753 cut-off events. [2023-08-29 19:40:09,471 INFO L131 PetriNetUnfolder]: For 138/138 co-relation queries the response was YES. [2023-08-29 19:40:09,472 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. [2023-08-29 19:40:09,474 INFO L137 encePairwiseOnDemand]: 389/395 looper letters, 55 selfloop transitions, 1 changer transitions 0/69 dead transitions. [2023-08-29 19:40:09,474 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 69 transitions, 318 flow [2023-08-29 19:40:09,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:40:09,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:40:09,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 676 transitions. [2023-08-29 19:40:09,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.570464135021097 [2023-08-29 19:40:09,476 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 676 transitions. [2023-08-29 19:40:09,476 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 676 transitions. [2023-08-29 19:40:09,477 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:40:09,477 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 676 transitions. [2023-08-29 19:40:09,478 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) [2023-08-29 19:40:09,479 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) [2023-08-29 19:40:09,479 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) [2023-08-29 19:40:09,479 INFO L175 Difference]: Start difference. First operand has 75 places, 72 transitions, 210 flow. Second operand 3 states and 676 transitions. [2023-08-29 19:40:09,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 69 transitions, 318 flow [2023-08-29 19:40:09,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 69 transitions, 312 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:40:09,481 INFO L231 Difference]: Finished difference. Result has 70 places, 67 transitions, 196 flow [2023-08-29 19:40:09,481 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} [2023-08-29 19:40:09,482 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -31 predicate places. [2023-08-29 19:40:09,482 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 67 transitions, 196 flow [2023-08-29 19:40:09,482 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) [2023-08-29 19:40:09,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:40:09,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:40:09,492 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 (13)] Ended with exit code 0 [2023-08-29 19:40:09,689 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 [2023-08-29 19:40:09,690 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread0Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-08-29 19:40:09,690 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:40:09,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1744317545, now seen corresponding path program 1 times [2023-08-29 19:40:09,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 19:40:09,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1071578934] [2023-08-29 19:40:09,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:40:09,691 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 [2023-08-29 19:40:09,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 19:40:09,692 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) [2023-08-29 19:40:09,693 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 [2023-08-29 19:40:09,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:40:09,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-29 19:40:09,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:40:09,783 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 [2023-08-29 19:40:09,802 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-29 19:40:09,802 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 [2023-08-29 19:40:09,819 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-29 19:40:09,820 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 [2023-08-29 19:40:09,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:40:09,836 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 19:40:09,836 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 19:40:09,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1071578934] [2023-08-29 19:40:09,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1071578934] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:40:09,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:40:09,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:40:09,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342631708] [2023-08-29 19:40:09,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:40:09,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:40:09,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 19:40:09,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:40:09,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:40:09,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 395 [2023-08-29 19:40:09,993 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) [2023-08-29 19:40:09,993 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:40:09,993 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 395 [2023-08-29 19:40:09,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:40:10,127 INFO L130 PetriNetUnfolder]: 415/735 cut-off events. [2023-08-29 19:40:10,128 INFO L131 PetriNetUnfolder]: For 128/128 co-relation queries the response was YES. [2023-08-29 19:40:10,129 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. [2023-08-29 19:40:10,130 INFO L137 encePairwiseOnDemand]: 391/395 looper letters, 51 selfloop transitions, 2 changer transitions 0/66 dead transitions. [2023-08-29 19:40:10,130 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 66 transitions, 302 flow [2023-08-29 19:40:10,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:40:10,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:40:10,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 661 transitions. [2023-08-29 19:40:10,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5578059071729958 [2023-08-29 19:40:10,132 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 661 transitions. [2023-08-29 19:40:10,132 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 661 transitions. [2023-08-29 19:40:10,133 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:40:10,133 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 661 transitions. [2023-08-29 19:40:10,134 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) [2023-08-29 19:40:10,135 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) [2023-08-29 19:40:10,136 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) [2023-08-29 19:40:10,136 INFO L175 Difference]: Start difference. First operand has 70 places, 67 transitions, 196 flow. Second operand 3 states and 661 transitions. [2023-08-29 19:40:10,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 66 transitions, 302 flow [2023-08-29 19:40:10,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 66 transitions, 301 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 19:40:10,137 INFO L231 Difference]: Finished difference. Result has 69 places, 65 transitions, 195 flow [2023-08-29 19:40:10,138 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} [2023-08-29 19:40:10,138 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -32 predicate places. [2023-08-29 19:40:10,138 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 65 transitions, 195 flow [2023-08-29 19:40:10,138 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) [2023-08-29 19:40:10,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:40:10,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:40:10,163 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 [2023-08-29 19:40:10,345 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 [2023-08-29 19:40:10,346 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread0Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-08-29 19:40:10,346 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:40:10,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1744317546, now seen corresponding path program 1 times [2023-08-29 19:40:10,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 19:40:10,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1126698375] [2023-08-29 19:40:10,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:40:10,347 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 [2023-08-29 19:40:10,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 19:40:10,349 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) [2023-08-29 19:40:10,350 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 [2023-08-29 19:40:10,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:40:10,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-29 19:40:10,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:40:10,462 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 [2023-08-29 19:40:10,466 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 [2023-08-29 19:40:10,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 19:40:10,490 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 [2023-08-29 19:40:10,500 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-29 19:40:10,500 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 [2023-08-29 19:40:10,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 19:40:10,546 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 [2023-08-29 19:40:10,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:40:10,651 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 19:40:10,651 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 19:40:10,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1126698375] [2023-08-29 19:40:10,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1126698375] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:40:10,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:40:10,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 19:40:10,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112221078] [2023-08-29 19:40:10,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:40:10,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 19:40:10,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 19:40:10,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 19:40:10,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-29 19:40:11,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 395 [2023-08-29 19:40:11,293 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) [2023-08-29 19:40:11,293 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:40:11,293 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 395 [2023-08-29 19:40:11,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:40:11,520 INFO L130 PetriNetUnfolder]: 403/707 cut-off events. [2023-08-29 19:40:11,520 INFO L131 PetriNetUnfolder]: For 128/128 co-relation queries the response was YES. [2023-08-29 19:40:11,521 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. [2023-08-29 19:40:11,522 INFO L137 encePairwiseOnDemand]: 389/395 looper letters, 51 selfloop transitions, 5 changer transitions 0/68 dead transitions. [2023-08-29 19:40:11,522 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 68 transitions, 323 flow [2023-08-29 19:40:11,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 19:40:11,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 19:40:11,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1047 transitions. [2023-08-29 19:40:11,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.530126582278481 [2023-08-29 19:40:11,524 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1047 transitions. [2023-08-29 19:40:11,524 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1047 transitions. [2023-08-29 19:40:11,525 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:40:11,525 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1047 transitions. [2023-08-29 19:40:11,526 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) [2023-08-29 19:40:11,528 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) [2023-08-29 19:40:11,528 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) [2023-08-29 19:40:11,528 INFO L175 Difference]: Start difference. First operand has 69 places, 65 transitions, 195 flow. Second operand 5 states and 1047 transitions. [2023-08-29 19:40:11,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 68 transitions, 323 flow [2023-08-29 19:40:11,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 68 transitions, 319 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:40:11,529 INFO L231 Difference]: Finished difference. Result has 69 places, 63 transitions, 197 flow [2023-08-29 19:40:11,530 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} [2023-08-29 19:40:11,530 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -32 predicate places. [2023-08-29 19:40:11,530 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 63 transitions, 197 flow [2023-08-29 19:40:11,530 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) [2023-08-29 19:40:11,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:40:11,531 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] [2023-08-29 19:40:11,538 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 [2023-08-29 19:40:11,731 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 [2023-08-29 19:40:11,731 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread0Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-08-29 19:40:11,732 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:40:11,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1251902500, now seen corresponding path program 1 times [2023-08-29 19:40:11,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 19:40:11,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [353285786] [2023-08-29 19:40:11,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:40:11,732 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 [2023-08-29 19:40:11,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 19:40:11,733 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) [2023-08-29 19:40:11,735 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 [2023-08-29 19:40:11,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:40:11,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-29 19:40:11,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:40:11,841 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 [2023-08-29 19:40:11,844 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 [2023-08-29 19:40:11,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 19:40:11,878 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 [2023-08-29 19:40:11,884 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-29 19:40:11,884 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 [2023-08-29 19:40:11,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:40:11,914 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 19:40:11,915 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 19:40:11,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [353285786] [2023-08-29 19:40:11,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [353285786] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:40:11,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:40:11,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 19:40:11,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368906852] [2023-08-29 19:40:11,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:40:11,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 19:40:11,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 19:40:11,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 19:40:11,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 19:40:12,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 395 [2023-08-29 19:40:12,190 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) [2023-08-29 19:40:12,190 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:40:12,190 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 395 [2023-08-29 19:40:12,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:40:12,308 INFO L130 PetriNetUnfolder]: 330/594 cut-off events. [2023-08-29 19:40:12,308 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-08-29 19:40:12,309 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. [2023-08-29 19:40:12,310 INFO L137 encePairwiseOnDemand]: 388/395 looper letters, 47 selfloop transitions, 4 changer transitions 0/62 dead transitions. [2023-08-29 19:40:12,310 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 62 transitions, 305 flow [2023-08-29 19:40:12,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 19:40:12,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 19:40:12,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 853 transitions. [2023-08-29 19:40:12,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.539873417721519 [2023-08-29 19:40:12,313 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 853 transitions. [2023-08-29 19:40:12,313 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 853 transitions. [2023-08-29 19:40:12,313 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:40:12,313 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 853 transitions. [2023-08-29 19:40:12,314 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) [2023-08-29 19:40:12,316 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) [2023-08-29 19:40:12,316 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) [2023-08-29 19:40:12,316 INFO L175 Difference]: Start difference. First operand has 69 places, 63 transitions, 197 flow. Second operand 4 states and 853 transitions. [2023-08-29 19:40:12,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 62 transitions, 305 flow [2023-08-29 19:40:12,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 62 transitions, 295 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-29 19:40:12,317 INFO L231 Difference]: Finished difference. Result has 64 places, 59 transitions, 187 flow [2023-08-29 19:40:12,318 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} [2023-08-29 19:40:12,318 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -37 predicate places. [2023-08-29 19:40:12,318 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 59 transitions, 187 flow [2023-08-29 19:40:12,318 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) [2023-08-29 19:40:12,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:40:12,319 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] [2023-08-29 19:40:12,332 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 [2023-08-29 19:40:12,526 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 [2023-08-29 19:40:12,526 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-08-29 19:40:12,526 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:40:12,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1643534116, now seen corresponding path program 1 times [2023-08-29 19:40:12,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 19:40:12,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1834671481] [2023-08-29 19:40:12,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:40:12,527 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 [2023-08-29 19:40:12,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 19:40:12,528 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) [2023-08-29 19:40:12,531 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 [2023-08-29 19:40:12,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:40:12,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-29 19:40:12,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:40:12,756 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 [2023-08-29 19:40:12,787 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-29 19:40:12,787 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 [2023-08-29 19:40:12,838 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2023-08-29 19:40:12,839 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 [2023-08-29 19:40:12,879 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2023-08-29 19:40:12,880 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 [2023-08-29 19:40:12,916 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2023-08-29 19:40:12,916 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 [2023-08-29 19:40:12,986 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2023-08-29 19:40:12,986 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 [2023-08-29 19:40:13,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 19:40:13,038 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-08-29 19:40:13,038 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 [2023-08-29 19:40:13,780 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 [2023-08-29 19:40:13,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:40:13,836 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 19:40:13,836 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 19:40:13,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1834671481] [2023-08-29 19:40:13,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1834671481] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:40:13,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:40:13,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 19:40:13,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695393825] [2023-08-29 19:40:13,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:40:13,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 19:40:13,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 19:40:13,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 19:40:13,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-29 19:40:14,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 395 [2023-08-29 19:40:14,813 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) [2023-08-29 19:40:14,813 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:40:14,813 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 395 [2023-08-29 19:40:14,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:40:15,061 INFO L130 PetriNetUnfolder]: 325/588 cut-off events. [2023-08-29 19:40:15,061 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-08-29 19:40:15,061 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. [2023-08-29 19:40:15,062 INFO L137 encePairwiseOnDemand]: 390/395 looper letters, 44 selfloop transitions, 5 changer transitions 0/61 dead transitions. [2023-08-29 19:40:15,063 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 61 transitions, 295 flow [2023-08-29 19:40:15,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 19:40:15,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 19:40:15,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 840 transitions. [2023-08-29 19:40:15,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5316455696202531 [2023-08-29 19:40:15,065 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 840 transitions. [2023-08-29 19:40:15,065 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 840 transitions. [2023-08-29 19:40:15,065 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:40:15,065 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 840 transitions. [2023-08-29 19:40:15,066 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) [2023-08-29 19:40:15,067 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) [2023-08-29 19:40:15,067 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) [2023-08-29 19:40:15,068 INFO L175 Difference]: Start difference. First operand has 64 places, 59 transitions, 187 flow. Second operand 4 states and 840 transitions. [2023-08-29 19:40:15,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 61 transitions, 295 flow [2023-08-29 19:40:15,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 61 transitions, 287 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 19:40:15,070 INFO L231 Difference]: Finished difference. Result has 65 places, 59 transitions, 196 flow [2023-08-29 19:40:15,070 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} [2023-08-29 19:40:15,071 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -36 predicate places. [2023-08-29 19:40:15,071 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 59 transitions, 196 flow [2023-08-29 19:40:15,071 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) [2023-08-29 19:40:15,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:40:15,071 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] [2023-08-29 19:40:15,081 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 [2023-08-29 19:40:15,279 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 [2023-08-29 19:40:15,279 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-08-29 19:40:15,280 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:40:15,280 INFO L85 PathProgramCache]: Analyzing trace with hash -826696940, now seen corresponding path program 1 times [2023-08-29 19:40:15,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 19:40:15,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2022624112] [2023-08-29 19:40:15,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:40:15,281 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 [2023-08-29 19:40:15,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 19:40:15,282 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) [2023-08-29 19:40:15,283 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 [2023-08-29 19:40:15,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:40:15,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-29 19:40:15,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:40:15,486 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 [2023-08-29 19:40:15,517 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-29 19:40:15,517 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 [2023-08-29 19:40:15,584 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2023-08-29 19:40:15,585 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 [2023-08-29 19:40:15,665 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2023-08-29 19:40:15,665 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 [2023-08-29 19:40:15,723 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2023-08-29 19:40:15,724 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 [2023-08-29 19:40:15,778 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2023-08-29 19:40:15,779 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 [2023-08-29 19:40:15,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 19:40:15,883 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-08-29 19:40:15,883 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 [2023-08-29 19:40:16,993 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 [2023-08-29 19:40:17,080 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 [2023-08-29 19:40:17,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:40:17,104 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 19:40:17,104 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 19:40:17,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2022624112] [2023-08-29 19:40:17,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2022624112] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:40:17,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:40:17,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-29 19:40:17,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579492349] [2023-08-29 19:40:17,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:40:17,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-29 19:40:17,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 19:40:17,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-29 19:40:17,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-29 19:40:19,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 395 [2023-08-29 19:40:19,346 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) [2023-08-29 19:40:19,346 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:40:19,346 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 395 [2023-08-29 19:40:19,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:40:19,749 INFO L130 PetriNetUnfolder]: 325/587 cut-off events. [2023-08-29 19:40:19,749 INFO L131 PetriNetUnfolder]: For 121/121 co-relation queries the response was YES. [2023-08-29 19:40:19,750 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. [2023-08-29 19:40:19,751 INFO L137 encePairwiseOnDemand]: 389/395 looper letters, 45 selfloop transitions, 6 changer transitions 0/62 dead transitions. [2023-08-29 19:40:19,751 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 62 transitions, 312 flow [2023-08-29 19:40:19,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 19:40:19,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 19:40:19,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1217 transitions. [2023-08-29 19:40:19,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5135021097046414 [2023-08-29 19:40:19,754 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1217 transitions. [2023-08-29 19:40:19,754 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1217 transitions. [2023-08-29 19:40:19,754 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:40:19,754 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1217 transitions. [2023-08-29 19:40:19,756 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) [2023-08-29 19:40:19,757 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) [2023-08-29 19:40:19,758 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) [2023-08-29 19:40:19,758 INFO L175 Difference]: Start difference. First operand has 65 places, 59 transitions, 196 flow. Second operand 6 states and 1217 transitions. [2023-08-29 19:40:19,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 62 transitions, 312 flow [2023-08-29 19:40:19,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 62 transitions, 302 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 19:40:19,759 INFO L231 Difference]: Finished difference. Result has 68 places, 59 transitions, 203 flow [2023-08-29 19:40:19,759 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} [2023-08-29 19:40:19,760 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -33 predicate places. [2023-08-29 19:40:19,760 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 59 transitions, 203 flow [2023-08-29 19:40:19,760 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) [2023-08-29 19:40:19,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:40:19,760 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] [2023-08-29 19:40:19,770 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 [2023-08-29 19:40:19,967 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 [2023-08-29 19:40:19,968 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-08-29 19:40:19,968 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:40:19,968 INFO L85 PathProgramCache]: Analyzing trace with hash 142196399, now seen corresponding path program 1 times [2023-08-29 19:40:19,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 19:40:19,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [752882342] [2023-08-29 19:40:19,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:40:19,969 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 [2023-08-29 19:40:19,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 19:40:19,970 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) [2023-08-29 19:40:19,971 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 [2023-08-29 19:40:20,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:40:20,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-29 19:40:20,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:40:20,178 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 [2023-08-29 19:40:20,212 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-29 19:40:20,212 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 [2023-08-29 19:40:20,266 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2023-08-29 19:40:20,267 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 [2023-08-29 19:40:20,333 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2023-08-29 19:40:20,334 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 [2023-08-29 19:40:20,459 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2023-08-29 19:40:20,459 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 [2023-08-29 19:40:20,564 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2023-08-29 19:40:20,565 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 [2023-08-29 19:40:20,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 19:40:20,727 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-08-29 19:40:20,727 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 [2023-08-29 19:40:22,184 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 [2023-08-29 19:40:22,288 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 [2023-08-29 19:40:22,321 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 [2023-08-29 19:40:22,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:40:22,351 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 19:40:22,351 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 19:40:22,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [752882342] [2023-08-29 19:40:22,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [752882342] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:40:22,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:40:22,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-29 19:40:22,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091856927] [2023-08-29 19:40:22,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:40:22,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-29 19:40:22,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 19:40:22,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-29 19:40:22,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2023-08-29 19:40:24,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 395 [2023-08-29 19:40:24,344 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) [2023-08-29 19:40:24,344 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:40:24,344 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 395 [2023-08-29 19:40:24,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:40:24,833 INFO L130 PetriNetUnfolder]: 325/586 cut-off events. [2023-08-29 19:40:24,833 INFO L131 PetriNetUnfolder]: For 134/134 co-relation queries the response was YES. [2023-08-29 19:40:24,833 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. [2023-08-29 19:40:24,834 INFO L137 encePairwiseOnDemand]: 387/395 looper letters, 45 selfloop transitions, 9 changer transitions 0/64 dead transitions. [2023-08-29 19:40:24,834 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 64 transitions, 335 flow [2023-08-29 19:40:24,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-29 19:40:24,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-29 19:40:24,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1578 transitions. [2023-08-29 19:40:24,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49936708860759493 [2023-08-29 19:40:24,837 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1578 transitions. [2023-08-29 19:40:24,837 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1578 transitions. [2023-08-29 19:40:24,838 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:40:24,838 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1578 transitions. [2023-08-29 19:40:24,839 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) [2023-08-29 19:40:24,841 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) [2023-08-29 19:40:24,842 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) [2023-08-29 19:40:24,842 INFO L175 Difference]: Start difference. First operand has 68 places, 59 transitions, 203 flow. Second operand 8 states and 1578 transitions. [2023-08-29 19:40:24,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 64 transitions, 335 flow [2023-08-29 19:40:24,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 64 transitions, 323 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-29 19:40:24,843 INFO L231 Difference]: Finished difference. Result has 71 places, 59 transitions, 215 flow [2023-08-29 19:40:24,843 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} [2023-08-29 19:40:24,843 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -30 predicate places. [2023-08-29 19:40:24,843 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 59 transitions, 215 flow [2023-08-29 19:40:24,844 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) [2023-08-29 19:40:24,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:40:24,844 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] [2023-08-29 19:40:24,852 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 [2023-08-29 19:40:25,051 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 [2023-08-29 19:40:25,051 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-08-29 19:40:25,052 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:40:25,052 INFO L85 PathProgramCache]: Analyzing trace with hash 113119549, now seen corresponding path program 1 times [2023-08-29 19:40:25,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 19:40:25,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1352523083] [2023-08-29 19:40:25,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:40:25,052 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 [2023-08-29 19:40:25,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 19:40:25,053 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) [2023-08-29 19:40:25,056 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 [2023-08-29 19:40:25,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:40:25,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-29 19:40:25,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:40:25,245 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 [2023-08-29 19:40:25,270 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-29 19:40:25,270 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 [2023-08-29 19:40:25,299 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-29 19:40:25,300 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 [2023-08-29 19:40:25,338 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-29 19:40:25,339 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 [2023-08-29 19:40:25,383 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-29 19:40:25,384 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 [2023-08-29 19:40:25,437 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-29 19:40:25,437 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 [2023-08-29 19:40:25,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 19:40:25,506 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 [2023-08-29 19:40:26,016 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 [2023-08-29 19:40:26,064 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 [2023-08-29 19:40:26,116 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 [2023-08-29 19:40:26,150 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 [2023-08-29 19:40:26,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:40:26,178 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 19:40:26,178 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 19:40:26,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1352523083] [2023-08-29 19:40:26,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1352523083] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:40:26,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:40:26,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-08-29 19:40:26,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769039199] [2023-08-29 19:40:26,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:40:26,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-29 19:40:26,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 19:40:26,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-29 19:40:26,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-08-29 19:40:28,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 395 [2023-08-29 19:40:28,417 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) [2023-08-29 19:40:28,417 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:40:28,417 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 395 [2023-08-29 19:40:28,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:40:28,866 INFO L130 PetriNetUnfolder]: 325/585 cut-off events. [2023-08-29 19:40:28,866 INFO L131 PetriNetUnfolder]: For 142/142 co-relation queries the response was YES. [2023-08-29 19:40:28,867 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. [2023-08-29 19:40:28,868 INFO L137 encePairwiseOnDemand]: 385/395 looper letters, 45 selfloop transitions, 13 changer transitions 0/67 dead transitions. [2023-08-29 19:40:28,868 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 67 transitions, 371 flow [2023-08-29 19:40:28,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-29 19:40:28,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-29 19:40:28,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1923 transitions. [2023-08-29 19:40:28,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48683544303797466 [2023-08-29 19:40:28,871 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1923 transitions. [2023-08-29 19:40:28,871 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1923 transitions. [2023-08-29 19:40:28,872 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:40:28,872 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1923 transitions. [2023-08-29 19:40:28,874 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) [2023-08-29 19:40:28,876 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) [2023-08-29 19:40:28,877 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) [2023-08-29 19:40:28,877 INFO L175 Difference]: Start difference. First operand has 71 places, 59 transitions, 215 flow. Second operand 10 states and 1923 transitions. [2023-08-29 19:40:28,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 67 transitions, 371 flow [2023-08-29 19:40:28,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 67 transitions, 353 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-08-29 19:40:28,880 INFO L231 Difference]: Finished difference. Result has 74 places, 59 transitions, 229 flow [2023-08-29 19:40:28,880 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} [2023-08-29 19:40:28,880 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -27 predicate places. [2023-08-29 19:40:28,880 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 59 transitions, 229 flow [2023-08-29 19:40:28,881 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) [2023-08-29 19:40:28,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:40:28,881 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] [2023-08-29 19:40:28,901 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 (20)] Ended with exit code 0 [2023-08-29 19:40:29,089 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 [2023-08-29 19:40:29,090 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-08-29 19:40:29,090 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:40:29,090 INFO L85 PathProgramCache]: Analyzing trace with hash -788260631, now seen corresponding path program 1 times [2023-08-29 19:40:29,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 19:40:29,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1553445217] [2023-08-29 19:40:29,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:40:29,091 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 [2023-08-29 19:40:29,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 19:40:29,092 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) [2023-08-29 19:40:29,094 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 [2023-08-29 19:40:29,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:40:29,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-29 19:40:29,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:40:29,267 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 [2023-08-29 19:40:29,295 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-29 19:40:29,296 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 [2023-08-29 19:40:29,343 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2023-08-29 19:40:29,343 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 [2023-08-29 19:40:29,429 INFO L321 Elim1Store]: treesize reduction 66, result has 34.0 percent of original size [2023-08-29 19:40:29,430 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 [2023-08-29 19:40:29,542 INFO L321 Elim1Store]: treesize reduction 66, result has 34.0 percent of original size [2023-08-29 19:40:29,542 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 [2023-08-29 19:40:29,701 INFO L321 Elim1Store]: treesize reduction 66, result has 34.0 percent of original size [2023-08-29 19:40:29,701 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 [2023-08-29 19:40:30,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 19:40:30,166 INFO L321 Elim1Store]: treesize reduction 24, result has 48.9 percent of original size [2023-08-29 19:40:30,166 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 [2023-08-29 19:40:34,480 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 [2023-08-29 19:40:34,798 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 [2023-08-29 19:40:34,961 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 [2023-08-29 19:40:35,011 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 [2023-08-29 19:40:35,076 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 [2023-08-29 19:40:35,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:40:35,125 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 19:40:35,125 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 19:40:35,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1553445217] [2023-08-29 19:40:35,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1553445217] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:40:35,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:40:35,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-08-29 19:40:35,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960626158] [2023-08-29 19:40:35,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:40:35,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-29 19:40:35,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 19:40:35,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-29 19:40:35,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2023-08-29 19:40:39,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 395 [2023-08-29 19:40:39,081 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) [2023-08-29 19:40:39,081 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:40:39,081 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 395 [2023-08-29 19:40:39,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:40:40,038 INFO L130 PetriNetUnfolder]: 325/584 cut-off events. [2023-08-29 19:40:40,039 INFO L131 PetriNetUnfolder]: For 133/133 co-relation queries the response was YES. [2023-08-29 19:40:40,039 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. [2023-08-29 19:40:40,040 INFO L137 encePairwiseOnDemand]: 383/395 looper letters, 42 selfloop transitions, 15 changer transitions 0/66 dead transitions. [2023-08-29 19:40:40,040 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 66 transitions, 369 flow [2023-08-29 19:40:40,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-29 19:40:40,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-29 19:40:40,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2065 transitions. [2023-08-29 19:40:40,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.475258918296893 [2023-08-29 19:40:40,044 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2065 transitions. [2023-08-29 19:40:40,044 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2065 transitions. [2023-08-29 19:40:40,045 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:40:40,045 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2065 transitions. [2023-08-29 19:40:40,047 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) [2023-08-29 19:40:40,050 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) [2023-08-29 19:40:40,051 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) [2023-08-29 19:40:40,051 INFO L175 Difference]: Start difference. First operand has 74 places, 59 transitions, 229 flow. Second operand 11 states and 2065 transitions. [2023-08-29 19:40:40,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 66 transitions, 369 flow [2023-08-29 19:40:40,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 66 transitions, 327 flow, removed 0 selfloop flow, removed 13 redundant places. [2023-08-29 19:40:40,052 INFO L231 Difference]: Finished difference. Result has 70 places, 58 transitions, 205 flow [2023-08-29 19:40:40,052 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} [2023-08-29 19:40:40,053 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -31 predicate places. [2023-08-29 19:40:40,053 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 58 transitions, 205 flow [2023-08-29 19:40:40,053 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) [2023-08-29 19:40:40,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:40:40,054 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] [2023-08-29 19:40:40,061 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 (21)] Forceful destruction successful, exit code 0 [2023-08-29 19:40:40,261 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 [2023-08-29 19:40:40,261 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-08-29 19:40:40,262 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:40:40,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1604208097, now seen corresponding path program 1 times [2023-08-29 19:40:40,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 19:40:40,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [981290701] [2023-08-29 19:40:40,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:40:40,263 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 [2023-08-29 19:40:40,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 19:40:40,264 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) [2023-08-29 19:40:40,267 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 [2023-08-29 19:40:40,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 19:40:40,477 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-29 19:40:40,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 19:40:40,657 INFO L130 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2023-08-29 19:40:40,658 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-29 19:40:40,658 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK (72 of 73 remaining) [2023-08-29 19:40:40,673 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (71 of 73 remaining) [2023-08-29 19:40:40,674 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (70 of 73 remaining) [2023-08-29 19:40:40,674 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (69 of 73 remaining) [2023-08-29 19:40:40,674 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (68 of 73 remaining) [2023-08-29 19:40:40,674 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (67 of 73 remaining) [2023-08-29 19:40:40,674 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (66 of 73 remaining) [2023-08-29 19:40:40,674 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (65 of 73 remaining) [2023-08-29 19:40:40,674 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (64 of 73 remaining) [2023-08-29 19:40:40,674 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (63 of 73 remaining) [2023-08-29 19:40:40,675 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (62 of 73 remaining) [2023-08-29 19:40:40,675 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (61 of 73 remaining) [2023-08-29 19:40:40,675 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (60 of 73 remaining) [2023-08-29 19:40:40,675 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 73 remaining) [2023-08-29 19:40:40,675 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (58 of 73 remaining) [2023-08-29 19:40:40,675 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 73 remaining) [2023-08-29 19:40:40,675 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 73 remaining) [2023-08-29 19:40:40,675 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (55 of 73 remaining) [2023-08-29 19:40:40,676 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 73 remaining) [2023-08-29 19:40:40,676 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 73 remaining) [2023-08-29 19:40:40,676 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 73 remaining) [2023-08-29 19:40:40,676 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (51 of 73 remaining) [2023-08-29 19:40:40,676 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err4INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (50 of 73 remaining) [2023-08-29 19:40:40,676 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err7INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (49 of 73 remaining) [2023-08-29 19:40:40,676 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err8INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (48 of 73 remaining) [2023-08-29 19:40:40,676 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err9INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (47 of 73 remaining) [2023-08-29 19:40:40,677 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 73 remaining) [2023-08-29 19:40:40,677 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 73 remaining) [2023-08-29 19:40:40,677 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 73 remaining) [2023-08-29 19:40:40,677 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 73 remaining) [2023-08-29 19:40:40,677 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 73 remaining) [2023-08-29 19:40:40,677 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 73 remaining) [2023-08-29 19:40:40,677 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 73 remaining) [2023-08-29 19:40:40,677 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 73 remaining) [2023-08-29 19:40:40,678 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 73 remaining) [2023-08-29 19:40:40,678 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 73 remaining) [2023-08-29 19:40:40,678 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 73 remaining) [2023-08-29 19:40:40,678 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 73 remaining) [2023-08-29 19:40:40,678 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (34 of 73 remaining) [2023-08-29 19:40:40,678 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (33 of 73 remaining) [2023-08-29 19:40:40,678 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 73 remaining) [2023-08-29 19:40:40,678 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 73 remaining) [2023-08-29 19:40:40,678 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 73 remaining) [2023-08-29 19:40:40,679 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 73 remaining) [2023-08-29 19:40:40,679 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 73 remaining) [2023-08-29 19:40:40,679 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 73 remaining) [2023-08-29 19:40:40,679 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 73 remaining) [2023-08-29 19:40:40,679 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 73 remaining) [2023-08-29 19:40:40,679 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 73 remaining) [2023-08-29 19:40:40,679 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 73 remaining) [2023-08-29 19:40:40,679 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 73 remaining) [2023-08-29 19:40:40,680 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 73 remaining) [2023-08-29 19:40:40,680 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 73 remaining) [2023-08-29 19:40:40,680 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 73 remaining) [2023-08-29 19:40:40,680 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 73 remaining) [2023-08-29 19:40:40,680 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 73 remaining) [2023-08-29 19:40:40,680 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 73 remaining) [2023-08-29 19:40:40,680 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 73 remaining) [2023-08-29 19:40:40,680 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 73 remaining) [2023-08-29 19:40:40,681 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 73 remaining) [2023-08-29 19:40:40,681 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Thread1of1ForFork4Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 73 remaining) [2023-08-29 19:40:40,681 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Thread1of1ForFork4Err2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (11 of 73 remaining) [2023-08-29 19:40:40,681 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Thread1of1ForFork4Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (10 of 73 remaining) [2023-08-29 19:40:40,681 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Thread1of1ForFork4Err6INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 73 remaining) [2023-08-29 19:40:40,681 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread0Thread1of1ForFork4Err10INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 73 remaining) [2023-08-29 19:40:40,681 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 73 remaining) [2023-08-29 19:40:40,681 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 73 remaining) [2023-08-29 19:40:40,682 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 73 remaining) [2023-08-29 19:40:40,682 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 73 remaining) [2023-08-29 19:40:40,682 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 73 remaining) [2023-08-29 19:40:40,682 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 73 remaining) [2023-08-29 19:40:40,682 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 73 remaining) [2023-08-29 19:40:40,682 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 73 remaining) [2023-08-29 19:40:40,705 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 [2023-08-29 19:40:40,891 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 [2023-08-29 19:40:40,892 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] [2023-08-29 19:40:40,898 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-29 19:40:40,898 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-29 19:40:40,951 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.08 07:40:40 BasicIcfg [2023-08-29 19:40:40,951 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-29 19:40:40,952 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-08-29 19:40:40,952 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-08-29 19:40:40,952 INFO L275 PluginConnector]: Witness Printer initialized [2023-08-29 19:40:40,952 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 07:39:38" (3/4) ... [2023-08-29 19:40:40,954 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-08-29 19:40:40,954 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-08-29 19:40:40,954 INFO L158 Benchmark]: Toolchain (without parser) took 63977.84ms. Allocated memory was 81.8MB in the beginning and 5.7GB in the end (delta: 5.6GB). Free memory was 56.3MB in the beginning and 3.6GB in the end (delta: -3.5GB). Peak memory consumption was 2.1GB. Max. memory is 16.1GB. [2023-08-29 19:40:40,954 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 60.8MB. Free memory is still 38.9MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-29 19:40:40,955 INFO L158 Benchmark]: CACSL2BoogieTranslator took 473.19ms. Allocated memory is still 81.8MB. Free memory was 56.3MB in the beginning and 41.4MB in the end (delta: 14.9MB). Peak memory consumption was 22.1MB. Max. memory is 16.1GB. [2023-08-29 19:40:40,955 INFO L158 Benchmark]: Boogie Procedure Inliner took 35.26ms. Allocated memory is still 81.8MB. Free memory was 41.4MB in the beginning and 39.3MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-29 19:40:40,955 INFO L158 Benchmark]: Boogie Preprocessor took 41.49ms. Allocated memory is still 81.8MB. Free memory was 39.2MB in the beginning and 37.2MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-29 19:40:40,955 INFO L158 Benchmark]: RCFGBuilder took 485.79ms. Allocated memory is still 81.8MB. Free memory was 37.1MB in the beginning and 42.1MB in the end (delta: -5.0MB). Peak memory consumption was 9.2MB. Max. memory is 16.1GB. [2023-08-29 19:40:40,955 INFO L158 Benchmark]: TraceAbstraction took 62935.57ms. Allocated memory was 81.8MB in the beginning and 5.7GB in the end (delta: 5.6GB). Free memory was 41.2MB in the beginning and 3.6GB in the end (delta: -3.5GB). Peak memory consumption was 2.0GB. Max. memory is 16.1GB. [2023-08-29 19:40:40,956 INFO L158 Benchmark]: Witness Printer took 2.42ms. Allocated memory is still 5.7GB. Free memory is still 3.6GB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-29 19:40:40,956 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 60.8MB. Free memory is still 38.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 473.19ms. Allocated memory is still 81.8MB. Free memory was 56.3MB in the beginning and 41.4MB in the end (delta: 14.9MB). Peak memory consumption was 22.1MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 35.26ms. Allocated memory is still 81.8MB. Free memory was 41.4MB in the beginning and 39.3MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 41.49ms. Allocated memory is still 81.8MB. Free memory was 39.2MB in the beginning and 37.2MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 485.79ms. Allocated memory is still 81.8MB. Free memory was 37.1MB in the beginning and 42.1MB in the end (delta: -5.0MB). Peak memory consumption was 9.2MB. Max. memory is 16.1GB. * TraceAbstraction took 62935.57ms. Allocated memory was 81.8MB in the beginning and 5.7GB in the end (delta: 5.6GB). Free memory was 41.2MB in the beginning and 3.6GB in the end (delta: -3.5GB). Peak memory consumption was 2.0GB. Max. memory is 16.1GB. * Witness Printer took 2.42ms. Allocated memory is still 5.7GB. Free memory is still 3.6GB. 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: 7.7s, 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: 62.7s, OverallIterations: 21, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 33.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 7.9s, HoareTripleCheckerStatistics: 8 mSolverCounterUnknown, 8858 SdHoareTripleChecker+Valid, 22.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 6068 mSDsluCounter, 778 SdHoareTripleChecker+Invalid, 20.5s 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, 3.0s 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: 0.2s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 14.1s 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 [2023-08-29 19:40:40,998 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