./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_70-funloop_racefree.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --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/goblint-regression/28-race_reach_70-funloop_racefree.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 2a10f98c1a89e2ac521234c9e4f0eca565cc5bc1484e9c7d67d861e216c6f9ba --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 04:14:16,759 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 04:14:16,761 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 04:14:16,813 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 04:14:16,815 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 04:14:16,817 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 04:14:16,819 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 04:14:16,821 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 04:14:16,823 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 04:14:16,827 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 04:14:16,828 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 04:14:16,830 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 04:14:16,830 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 04:14:16,832 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 04:14:16,833 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 04:14:16,837 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 04:14:16,838 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 04:14:16,840 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 04:14:16,841 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 04:14:16,845 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 04:14:16,846 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 04:14:16,846 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 04:14:16,847 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 04:14:16,848 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 04:14:16,853 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 04:14:16,854 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 04:14:16,854 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 04:14:16,856 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 04:14:16,856 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 04:14:16,857 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 04:14:16,857 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 04:14:16,863 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 04:14:16,864 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 04:14:16,865 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 04:14:16,865 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 04:14:16,865 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 04:14:16,866 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 04:14:16,866 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 04:14:16,866 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 04:14:16,867 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 04:14:16,867 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 04:14:16,870 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 04:14:16,897 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 04:14:16,897 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 04:14:16,898 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 04:14:16,898 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 04:14:16,899 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 04:14:16,899 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 04:14:16,900 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 04:14:16,900 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 04:14:16,900 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 04:14:16,900 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 04:14:16,901 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 04:14:16,901 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 04:14:16,901 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 04:14:16,901 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 04:14:16,901 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 04:14:16,901 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 04:14:16,902 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 04:14:16,902 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 04:14:16,902 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 04:14:16,902 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 04:14:16,902 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 04:14:16,902 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 04:14:16,902 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 04:14:16,903 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 04:14:16,903 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 04:14:16,903 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 04:14:16,903 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 04:14:16,903 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 04:14:16,903 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 04:14:16,903 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 04:14:16,904 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 04:14:16,904 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 04:14:16,904 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 04:14:16,904 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 04:14:16,904 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2a10f98c1a89e2ac521234c9e4f0eca565cc5bc1484e9c7d67d861e216c6f9ba Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 04:14:17,202 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 04:14:17,216 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 04:14:17,218 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 04:14:17,219 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 04:14:17,219 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 04:14:17,220 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_70-funloop_racefree.i [2023-08-30 04:14:18,262 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 04:14:18,601 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 04:14:18,603 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_70-funloop_racefree.i [2023-08-30 04:14:18,622 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d042c3c2/a77325abcf4f409694e57ec1dde530f6/FLAGac0cf7c4e [2023-08-30 04:14:18,870 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d042c3c2/a77325abcf4f409694e57ec1dde530f6 [2023-08-30 04:14:18,872 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 04:14:18,873 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 04:14:18,874 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 04:14:18,874 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 04:14:18,876 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 04:14:18,877 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:14:18" (1/1) ... [2023-08-30 04:14:18,878 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@113fdc56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:14:18, skipping insertion in model container [2023-08-30 04:14:18,878 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:14:18" (1/1) ... [2023-08-30 04:14:18,882 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 04:14:18,913 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 04:14:19,202 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_70-funloop_racefree.i[41323,41336] [2023-08-30 04:14:19,234 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 04:14:19,254 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 04:14:19,303 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_70-funloop_racefree.i[41323,41336] [2023-08-30 04:14:19,317 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 04:14:19,384 INFO L208 MainTranslator]: Completed translation [2023-08-30 04:14:19,385 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:14:19 WrapperNode [2023-08-30 04:14:19,385 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 04:14:19,386 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 04:14:19,386 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 04:14:19,386 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 04:14:19,392 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:14:19" (1/1) ... [2023-08-30 04:14:19,426 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:14:19" (1/1) ... [2023-08-30 04:14:19,460 INFO L138 Inliner]: procedures = 271, calls = 31, calls flagged for inlining = 5, calls inlined = 6, statements flattened = 195 [2023-08-30 04:14:19,460 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 04:14:19,461 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 04:14:19,461 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 04:14:19,461 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 04:14:19,468 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:14:19" (1/1) ... [2023-08-30 04:14:19,469 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:14:19" (1/1) ... [2023-08-30 04:14:19,481 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:14:19" (1/1) ... [2023-08-30 04:14:19,482 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:14:19" (1/1) ... [2023-08-30 04:14:19,495 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:14:19" (1/1) ... [2023-08-30 04:14:19,505 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:14:19" (1/1) ... [2023-08-30 04:14:19,508 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:14:19" (1/1) ... [2023-08-30 04:14:19,512 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:14:19" (1/1) ... [2023-08-30 04:14:19,528 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 04:14:19,529 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 04:14:19,530 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 04:14:19,530 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 04:14:19,531 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:14:19" (1/1) ... [2023-08-30 04:14:19,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 04:14:19,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:14:19,574 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) [2023-08-30 04:14:19,581 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 [2023-08-30 04:14:19,602 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 04:14:19,603 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 04:14:19,603 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 04:14:19,603 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 04:14:19,603 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-30 04:14:19,603 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 04:14:19,603 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-30 04:14:19,604 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-30 04:14:19,604 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 04:14:19,604 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 04:14:19,604 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 04:14:19,605 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 04:14:19,716 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 04:14:19,718 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 04:14:19,998 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 04:14:20,004 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 04:14:20,005 INFO L302 CfgBuilder]: Removed 25 assume(true) statements. [2023-08-30 04:14:20,006 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:14:20 BoogieIcfgContainer [2023-08-30 04:14:20,006 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 04:14:20,008 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 04:14:20,008 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 04:14:20,010 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 04:14:20,010 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 04:14:18" (1/3) ... [2023-08-30 04:14:20,010 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6efd6308 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:14:20, skipping insertion in model container [2023-08-30 04:14:20,010 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:14:19" (2/3) ... [2023-08-30 04:14:20,011 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6efd6308 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:14:20, skipping insertion in model container [2023-08-30 04:14:20,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:14:20" (3/3) ... [2023-08-30 04:14:20,025 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_70-funloop_racefree.i [2023-08-30 04:14:20,037 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 04:14:20,037 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 27 error locations. [2023-08-30 04:14:20,037 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 04:14:20,178 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-30 04:14:20,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 190 places, 220 transitions, 448 flow [2023-08-30 04:14:20,323 INFO L130 PetriNetUnfolder]: 49/318 cut-off events. [2023-08-30 04:14:20,324 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 04:14:20,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 324 conditions, 318 events. 49/318 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1325 event pairs, 0 based on Foata normal form. 0/223 useless extension candidates. Maximal degree in co-relation 182. Up to 8 conditions per place. [2023-08-30 04:14:20,332 INFO L82 GeneralOperation]: Start removeDead. Operand has 190 places, 220 transitions, 448 flow [2023-08-30 04:14:20,345 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 190 places, 220 transitions, 448 flow [2023-08-30 04:14:20,350 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 04:14:20,366 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 190 places, 220 transitions, 448 flow [2023-08-30 04:14:20,372 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 190 places, 220 transitions, 448 flow [2023-08-30 04:14:20,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 190 places, 220 transitions, 448 flow [2023-08-30 04:14:20,424 INFO L130 PetriNetUnfolder]: 49/318 cut-off events. [2023-08-30 04:14:20,424 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 04:14:20,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 324 conditions, 318 events. 49/318 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1325 event pairs, 0 based on Foata normal form. 0/223 useless extension candidates. Maximal degree in co-relation 182. Up to 8 conditions per place. [2023-08-30 04:14:20,434 INFO L119 LiptonReduction]: Number of co-enabled transitions 16432 [2023-08-30 04:14:22,953 INFO L134 LiptonReduction]: Checked pairs total: 30755 [2023-08-30 04:14:22,954 INFO L136 LiptonReduction]: Total number of compositions: 192 [2023-08-30 04:14:22,969 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 04:14:22,974 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;@6f65a7c2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 04:14:22,974 INFO L358 AbstractCegarLoop]: Starting to check reachability of 39 error locations. [2023-08-30 04:14:22,976 INFO L130 PetriNetUnfolder]: 1/4 cut-off events. [2023-08-30 04:14:22,976 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:14:22,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:14:22,977 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 04:14:22,977 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 04:14:22,980 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:14:22,982 INFO L85 PathProgramCache]: Analyzing trace with hash 868565, now seen corresponding path program 1 times [2023-08-30 04:14:22,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:14:22,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689577602] [2023-08-30 04:14:22,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:14:22,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:14:23,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:14:23,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:14:23,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:14:23,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689577602] [2023-08-30 04:14:23,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689577602] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:14:23,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:14:23,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:14:23,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095790392] [2023-08-30 04:14:23,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:14:23,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:14:23,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:14:23,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:14:23,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:14:23,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 412 [2023-08-30 04:14:23,245 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 98 transitions, 204 flow. Second operand has 3 states, 3 states have (on average 186.0) internal successors, (558), 3 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:14:23,245 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:14:23,246 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 412 [2023-08-30 04:14:23,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:14:23,439 INFO L130 PetriNetUnfolder]: 684/1521 cut-off events. [2023-08-30 04:14:23,440 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 04:14:23,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2825 conditions, 1521 events. 684/1521 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9579 event pairs, 580 based on Foata normal form. 104/1127 useless extension candidates. Maximal degree in co-relation 2738. Up to 1296 conditions per place. [2023-08-30 04:14:23,446 INFO L137 encePairwiseOnDemand]: 381/412 looper letters, 56 selfloop transitions, 2 changer transitions 0/71 dead transitions. [2023-08-30 04:14:23,446 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 71 transitions, 266 flow [2023-08-30 04:14:23,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:14:23,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:14:23,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 642 transitions. [2023-08-30 04:14:23,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5194174757281553 [2023-08-30 04:14:23,457 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 642 transitions. [2023-08-30 04:14:23,457 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 642 transitions. [2023-08-30 04:14:23,459 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:14:23,460 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 642 transitions. [2023-08-30 04:14:23,463 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 214.0) internal successors, (642), 3 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:14:23,468 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 412.0) internal successors, (1648), 4 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:14:23,468 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 412.0) internal successors, (1648), 4 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:14:23,470 INFO L175 Difference]: Start difference. First operand has 73 places, 98 transitions, 204 flow. Second operand 3 states and 642 transitions. [2023-08-30 04:14:23,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 71 transitions, 266 flow [2023-08-30 04:14:23,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 71 transitions, 266 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 04:14:23,474 INFO L231 Difference]: Finished difference. Result has 70 places, 71 transitions, 160 flow [2023-08-30 04:14:23,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=160, PETRI_PLACES=70, PETRI_TRANSITIONS=71} [2023-08-30 04:14:23,478 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, -3 predicate places. [2023-08-30 04:14:23,478 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 71 transitions, 160 flow [2023-08-30 04:14:23,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 186.0) internal successors, (558), 3 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:14:23,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:14:23,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 04:14:23,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 04:14:23,479 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 04:14:23,480 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:14:23,480 INFO L85 PathProgramCache]: Analyzing trace with hash 26929924, now seen corresponding path program 1 times [2023-08-30 04:14:23,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:14:23,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400044633] [2023-08-30 04:14:23,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:14:23,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:14:23,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:14:23,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:14:23,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:14:23,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400044633] [2023-08-30 04:14:23,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400044633] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:14:23,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351404087] [2023-08-30 04:14:23,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:14:23,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:14:23,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:14:23,531 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 04:14:23,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 04:14:23,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:14:23,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 04:14:23,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:14:23,642 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:14:23,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:14:23,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:14:23,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351404087] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:14:23,654 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 04:14:23,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 04:14:23,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928656015] [2023-08-30 04:14:23,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 04:14:23,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 04:14:23,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:14:23,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 04:14:23,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 04:14:23,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 412 [2023-08-30 04:14:23,674 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 71 transitions, 160 flow. Second operand has 7 states, 7 states have (on average 185.28571428571428) internal successors, (1297), 7 states have internal predecessors, (1297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:14:23,674 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:14:23,674 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 412 [2023-08-30 04:14:23,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:14:23,918 INFO L130 PetriNetUnfolder]: 684/1524 cut-off events. [2023-08-30 04:14:23,918 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 04:14:23,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2841 conditions, 1524 events. 684/1524 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9563 event pairs, 580 based on Foata normal form. 0/1026 useless extension candidates. Maximal degree in co-relation 2829. Up to 1296 conditions per place. [2023-08-30 04:14:23,924 INFO L137 encePairwiseOnDemand]: 409/412 looper letters, 56 selfloop transitions, 5 changer transitions 0/74 dead transitions. [2023-08-30 04:14:23,924 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 74 transitions, 294 flow [2023-08-30 04:14:23,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 04:14:23,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 04:14:23,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1168 transitions. [2023-08-30 04:14:23,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47249190938511326 [2023-08-30 04:14:23,926 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1168 transitions. [2023-08-30 04:14:23,926 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1168 transitions. [2023-08-30 04:14:23,927 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:14:23,927 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1168 transitions. [2023-08-30 04:14:23,929 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 194.66666666666666) internal successors, (1168), 6 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:14:23,943 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 412.0) internal successors, (2884), 7 states have internal predecessors, (2884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:14:23,944 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 412.0) internal successors, (2884), 7 states have internal predecessors, (2884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:14:23,945 INFO L175 Difference]: Start difference. First operand has 70 places, 71 transitions, 160 flow. Second operand 6 states and 1168 transitions. [2023-08-30 04:14:23,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 74 transitions, 294 flow [2023-08-30 04:14:23,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 74 transitions, 290 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 04:14:23,948 INFO L231 Difference]: Finished difference. Result has 77 places, 74 transitions, 192 flow [2023-08-30 04:14:23,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=192, PETRI_PLACES=77, PETRI_TRANSITIONS=74} [2023-08-30 04:14:23,949 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 4 predicate places. [2023-08-30 04:14:23,949 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 74 transitions, 192 flow [2023-08-30 04:14:23,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 185.28571428571428) internal successors, (1297), 7 states have internal predecessors, (1297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:14:23,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:14:23,950 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-08-30 04:14:23,981 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-30 04:14:24,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:14:24,155 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 04:14:24,156 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:14:24,156 INFO L85 PathProgramCache]: Analyzing trace with hash -885140331, now seen corresponding path program 2 times [2023-08-30 04:14:24,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:14:24,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274875243] [2023-08-30 04:14:24,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:14:24,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:14:24,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:14:24,249 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 04:14:24,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:14:24,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274875243] [2023-08-30 04:14:24,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274875243] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:14:24,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:14:24,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:14:24,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664038698] [2023-08-30 04:14:24,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:14:24,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:14:24,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:14:24,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:14:24,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:14:24,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 412 [2023-08-30 04:14:24,301 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 74 transitions, 192 flow. Second operand has 3 states, 3 states have (on average 182.33333333333334) internal successors, (547), 3 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:14:24,301 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:14:24,301 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 412 [2023-08-30 04:14:24,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:14:24,464 INFO L130 PetriNetUnfolder]: 638/1410 cut-off events. [2023-08-30 04:14:24,465 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 04:14:24,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2654 conditions, 1410 events. 638/1410 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 8757 event pairs, 500 based on Foata normal form. 0/968 useless extension candidates. Maximal degree in co-relation 2620. Up to 1121 conditions per place. [2023-08-30 04:14:24,471 INFO L137 encePairwiseOnDemand]: 407/412 looper letters, 77 selfloop transitions, 3 changer transitions 0/93 dead transitions. [2023-08-30 04:14:24,471 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 93 transitions, 390 flow [2023-08-30 04:14:24,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:14:24,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:14:24,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 621 transitions. [2023-08-30 04:14:24,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5024271844660194 [2023-08-30 04:14:24,473 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 621 transitions. [2023-08-30 04:14:24,473 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 621 transitions. [2023-08-30 04:14:24,473 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:14:24,473 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 621 transitions. [2023-08-30 04:14:24,475 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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) [2023-08-30 04:14:24,476 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 412.0) internal successors, (1648), 4 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:14:24,477 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 412.0) internal successors, (1648), 4 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:14:24,477 INFO L175 Difference]: Start difference. First operand has 77 places, 74 transitions, 192 flow. Second operand 3 states and 621 transitions. [2023-08-30 04:14:24,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 93 transitions, 390 flow [2023-08-30 04:14:24,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 93 transitions, 376 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-30 04:14:24,480 INFO L231 Difference]: Finished difference. Result has 76 places, 72 transitions, 180 flow [2023-08-30 04:14:24,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=74, 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=180, PETRI_PLACES=76, PETRI_TRANSITIONS=72} [2023-08-30 04:14:24,480 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 3 predicate places. [2023-08-30 04:14:24,481 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 72 transitions, 180 flow [2023-08-30 04:14:24,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 182.33333333333334) internal successors, (547), 3 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:14:24,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:14:24,481 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-08-30 04:14:24,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 04:14:24,482 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 04:14:24,482 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:14:24,482 INFO L85 PathProgramCache]: Analyzing trace with hash -885140330, now seen corresponding path program 1 times [2023-08-30 04:14:24,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:14:24,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211131717] [2023-08-30 04:14:24,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:14:24,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:14:24,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:14:24,536 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:14:24,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:14:24,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211131717] [2023-08-30 04:14:24,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211131717] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:14:24,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754553274] [2023-08-30 04:14:24,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:14:24,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:14:24,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:14:24,557 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 04:14:24,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 04:14:24,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:14:24,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 04:14:24,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:14:24,640 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:14:24,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:14:24,680 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:14:24,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754553274] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:14:24,681 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 04:14:24,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-30 04:14:24,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833815421] [2023-08-30 04:14:24,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 04:14:24,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 04:14:24,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:14:24,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 04:14:24,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-30 04:14:24,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 412 [2023-08-30 04:14:24,713 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 72 transitions, 180 flow. Second operand has 13 states, 13 states have (on average 185.15384615384616) internal successors, (2407), 13 states have internal predecessors, (2407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:14:24,713 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:14:24,713 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 412 [2023-08-30 04:14:24,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:14:24,905 INFO L130 PetriNetUnfolder]: 640/1430 cut-off events. [2023-08-30 04:14:24,906 INFO L131 PetriNetUnfolder]: For 67/67 co-relation queries the response was YES. [2023-08-30 04:14:24,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2731 conditions, 1430 events. 640/1430 cut-off events. For 67/67 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 8850 event pairs, 540 based on Foata normal form. 6/1017 useless extension candidates. Maximal degree in co-relation 2679. Up to 1210 conditions per place. [2023-08-30 04:14:24,928 INFO L137 encePairwiseOnDemand]: 409/412 looper letters, 54 selfloop transitions, 11 changer transitions 0/78 dead transitions. [2023-08-30 04:14:24,928 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 78 transitions, 346 flow [2023-08-30 04:14:24,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 04:14:24,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 04:14:24,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2279 transitions. [2023-08-30 04:14:24,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46096278317152106 [2023-08-30 04:14:24,933 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2279 transitions. [2023-08-30 04:14:24,933 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2279 transitions. [2023-08-30 04:14:24,934 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:14:24,934 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2279 transitions. [2023-08-30 04:14:24,938 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 189.91666666666666) internal successors, (2279), 12 states have internal predecessors, (2279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:14:24,944 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 412.0) internal successors, (5356), 13 states have internal predecessors, (5356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:14:24,945 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 412.0) internal successors, (5356), 13 states have internal predecessors, (5356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:14:24,945 INFO L175 Difference]: Start difference. First operand has 76 places, 72 transitions, 180 flow. Second operand 12 states and 2279 transitions. [2023-08-30 04:14:24,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 78 transitions, 346 flow [2023-08-30 04:14:24,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 78 transitions, 340 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:14:24,947 INFO L231 Difference]: Finished difference. Result has 91 places, 78 transitions, 258 flow [2023-08-30 04:14:24,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=258, PETRI_PLACES=91, PETRI_TRANSITIONS=78} [2023-08-30 04:14:24,948 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 18 predicate places. [2023-08-30 04:14:24,948 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 78 transitions, 258 flow [2023-08-30 04:14:24,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 185.15384615384616) internal successors, (2407), 13 states have internal predecessors, (2407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:14:24,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:14:24,949 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1] [2023-08-30 04:14:24,965 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-30 04:14:25,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-08-30 04:14:25,155 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 04:14:25,155 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:14:25,155 INFO L85 PathProgramCache]: Analyzing trace with hash 2063593014, now seen corresponding path program 2 times [2023-08-30 04:14:25,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:14:25,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379521284] [2023-08-30 04:14:25,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:14:25,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:14:25,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:14:25,263 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 04:14:25,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:14:25,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379521284] [2023-08-30 04:14:25,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379521284] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:14:25,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:14:25,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:14:25,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570128613] [2023-08-30 04:14:25,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:14:25,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:14:25,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:14:25,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:14:25,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:14:25,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 412 [2023-08-30 04:14:25,319 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 78 transitions, 258 flow. Second operand has 3 states, 3 states have (on average 185.33333333333334) internal successors, (556), 3 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:14:25,319 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:14:25,319 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 412 [2023-08-30 04:14:25,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:14:25,498 INFO L130 PetriNetUnfolder]: 612/1330 cut-off events. [2023-08-30 04:14:25,499 INFO L131 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2023-08-30 04:14:25,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2613 conditions, 1330 events. 612/1330 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 8235 event pairs, 0 based on Foata normal form. 0/907 useless extension candidates. Maximal degree in co-relation 2537. Up to 1174 conditions per place. [2023-08-30 04:14:25,506 INFO L137 encePairwiseOnDemand]: 408/412 looper letters, 85 selfloop transitions, 2 changer transitions 0/100 dead transitions. [2023-08-30 04:14:25,506 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 100 transitions, 476 flow [2023-08-30 04:14:25,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:14:25,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:14:25,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 631 transitions. [2023-08-30 04:14:25,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5105177993527508 [2023-08-30 04:14:25,509 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 631 transitions. [2023-08-30 04:14:25,509 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 631 transitions. [2023-08-30 04:14:25,510 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:14:25,510 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 631 transitions. [2023-08-30 04:14:25,511 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 210.33333333333334) internal successors, (631), 3 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:14:25,513 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 412.0) internal successors, (1648), 4 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:14:25,513 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 412.0) internal successors, (1648), 4 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:14:25,514 INFO L175 Difference]: Start difference. First operand has 91 places, 78 transitions, 258 flow. Second operand 3 states and 631 transitions. [2023-08-30 04:14:25,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 100 transitions, 476 flow [2023-08-30 04:14:25,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 100 transitions, 428 flow, removed 19 selfloop flow, removed 5 redundant places. [2023-08-30 04:14:25,521 INFO L231 Difference]: Finished difference. Result has 89 places, 78 transitions, 220 flow [2023-08-30 04:14:25,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=86, 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=89, PETRI_TRANSITIONS=78} [2023-08-30 04:14:25,526 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 16 predicate places. [2023-08-30 04:14:25,526 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 78 transitions, 220 flow [2023-08-30 04:14:25,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 185.33333333333334) internal successors, (556), 3 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:14:25,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:14:25,527 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2023-08-30 04:14:25,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 04:14:25,527 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 04:14:25,527 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:14:25,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1661798980, now seen corresponding path program 1 times [2023-08-30 04:14:25,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:14:25,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523742709] [2023-08-30 04:14:25,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:14:25,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:14:25,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:14:25,657 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 04:14:25,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:14:25,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523742709] [2023-08-30 04:14:25,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523742709] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:14:25,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188567805] [2023-08-30 04:14:25,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:14:25,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:14:25,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:14:25,671 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 04:14:25,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 04:14:25,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:14:25,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 04:14:25,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:14:25,784 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 [2023-08-30 04:14:25,835 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 04:14:25,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:14:25,894 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 04:14:25,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188567805] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:14:25,894 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 04:14:25,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-08-30 04:14:25,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437840320] [2023-08-30 04:14:25,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 04:14:25,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 04:14:25,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:14:25,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 04:14:25,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-30 04:14:26,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 412 [2023-08-30 04:14:26,117 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 78 transitions, 220 flow. Second operand has 8 states, 8 states have (on average 182.125) internal successors, (1457), 8 states have internal predecessors, (1457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:14:26,117 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:14:26,117 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 412 [2023-08-30 04:14:26,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:14:26,206 INFO L130 PetriNetUnfolder]: 47/148 cut-off events. [2023-08-30 04:14:26,207 INFO L131 PetriNetUnfolder]: For 97/97 co-relation queries the response was YES. [2023-08-30 04:14:26,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 363 conditions, 148 events. 47/148 cut-off events. For 97/97 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 492 event pairs, 10 based on Foata normal form. 21/151 useless extension candidates. Maximal degree in co-relation 310. Up to 84 conditions per place. [2023-08-30 04:14:26,208 INFO L137 encePairwiseOnDemand]: 408/412 looper letters, 57 selfloop transitions, 2 changer transitions 0/67 dead transitions. [2023-08-30 04:14:26,208 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 67 transitions, 309 flow [2023-08-30 04:14:26,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 04:14:26,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 04:14:26,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 771 transitions. [2023-08-30 04:14:26,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4678398058252427 [2023-08-30 04:14:26,211 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 771 transitions. [2023-08-30 04:14:26,211 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 771 transitions. [2023-08-30 04:14:26,211 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:14:26,211 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 771 transitions. [2023-08-30 04:14:26,212 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 192.75) internal successors, (771), 4 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:14:26,214 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 412.0) internal successors, (2060), 5 states have internal predecessors, (2060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:14:26,215 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 412.0) internal successors, (2060), 5 states have internal predecessors, (2060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:14:26,215 INFO L175 Difference]: Start difference. First operand has 89 places, 78 transitions, 220 flow. Second operand 4 states and 771 transitions. [2023-08-30 04:14:26,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 67 transitions, 309 flow [2023-08-30 04:14:26,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 67 transitions, 303 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 04:14:26,216 INFO L231 Difference]: Finished difference. Result has 59 places, 45 transitions, 145 flow [2023-08-30 04:14:26,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=145, PETRI_PLACES=59, PETRI_TRANSITIONS=45} [2023-08-30 04:14:26,217 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, -14 predicate places. [2023-08-30 04:14:26,217 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 45 transitions, 145 flow [2023-08-30 04:14:26,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 182.125) internal successors, (1457), 8 states have internal predecessors, (1457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:14:26,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:14:26,218 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2023-08-30 04:14:26,226 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 04:14:26,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:14:26,427 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 04:14:26,428 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:14:26,428 INFO L85 PathProgramCache]: Analyzing trace with hash 23839764, now seen corresponding path program 1 times [2023-08-30 04:14:26,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:14:26,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29039290] [2023-08-30 04:14:26,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:14:26,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:14:26,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:14:26,444 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 04:14:26,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:14:26,468 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 04:14:26,468 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 04:14:26,469 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (38 of 39 remaining) [2023-08-30 04:14:26,470 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 39 remaining) [2023-08-30 04:14:26,470 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 39 remaining) [2023-08-30 04:14:26,470 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 39 remaining) [2023-08-30 04:14:26,470 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 39 remaining) [2023-08-30 04:14:26,470 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK (33 of 39 remaining) [2023-08-30 04:14:26,470 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 39 remaining) [2023-08-30 04:14:26,470 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 39 remaining) [2023-08-30 04:14:26,470 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 39 remaining) [2023-08-30 04:14:26,471 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 39 remaining) [2023-08-30 04:14:26,471 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 39 remaining) [2023-08-30 04:14:26,471 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 39 remaining) [2023-08-30 04:14:26,471 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 39 remaining) [2023-08-30 04:14:26,471 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 39 remaining) [2023-08-30 04:14:26,471 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 39 remaining) [2023-08-30 04:14:26,471 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 39 remaining) [2023-08-30 04:14:26,471 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (22 of 39 remaining) [2023-08-30 04:14:26,471 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 39 remaining) [2023-08-30 04:14:26,471 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 39 remaining) [2023-08-30 04:14:26,471 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 39 remaining) [2023-08-30 04:14:26,471 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 39 remaining) [2023-08-30 04:14:26,472 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 39 remaining) [2023-08-30 04:14:26,472 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 39 remaining) [2023-08-30 04:14:26,472 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 39 remaining) [2023-08-30 04:14:26,472 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 39 remaining) [2023-08-30 04:14:26,472 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 39 remaining) [2023-08-30 04:14:26,472 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 39 remaining) [2023-08-30 04:14:26,472 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (11 of 39 remaining) [2023-08-30 04:14:26,472 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 39 remaining) [2023-08-30 04:14:26,472 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 39 remaining) [2023-08-30 04:14:26,472 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 39 remaining) [2023-08-30 04:14:26,472 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 39 remaining) [2023-08-30 04:14:26,472 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 39 remaining) [2023-08-30 04:14:26,472 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 39 remaining) [2023-08-30 04:14:26,472 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 39 remaining) [2023-08-30 04:14:26,473 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 39 remaining) [2023-08-30 04:14:26,473 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 39 remaining) [2023-08-30 04:14:26,473 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 39 remaining) [2023-08-30 04:14:26,473 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (0 of 39 remaining) [2023-08-30 04:14:26,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 04:14:26,473 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1] [2023-08-30 04:14:26,490 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 04:14:26,490 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-30 04:14:26,528 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 04:14:26,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 258 places, 301 transitions, 620 flow [2023-08-30 04:14:26,598 INFO L130 PetriNetUnfolder]: 82/526 cut-off events. [2023-08-30 04:14:26,598 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 04:14:26,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 540 conditions, 526 events. 82/526 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 2615 event pairs, 0 based on Foata normal form. 0/367 useless extension candidates. Maximal degree in co-relation 320. Up to 12 conditions per place. [2023-08-30 04:14:26,602 INFO L82 GeneralOperation]: Start removeDead. Operand has 258 places, 301 transitions, 620 flow [2023-08-30 04:14:26,606 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 258 places, 301 transitions, 620 flow [2023-08-30 04:14:26,606 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 04:14:26,607 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 258 places, 301 transitions, 620 flow [2023-08-30 04:14:26,607 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 258 places, 301 transitions, 620 flow [2023-08-30 04:14:26,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 258 places, 301 transitions, 620 flow [2023-08-30 04:14:26,646 INFO L130 PetriNetUnfolder]: 82/526 cut-off events. [2023-08-30 04:14:26,646 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 04:14:26,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 540 conditions, 526 events. 82/526 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 2615 event pairs, 0 based on Foata normal form. 0/367 useless extension candidates. Maximal degree in co-relation 320. Up to 12 conditions per place. [2023-08-30 04:14:26,667 INFO L119 LiptonReduction]: Number of co-enabled transitions 47084 [2023-08-30 04:14:30,410 INFO L134 LiptonReduction]: Checked pairs total: 97934 [2023-08-30 04:14:30,411 INFO L136 LiptonReduction]: Total number of compositions: 266 [2023-08-30 04:14:30,413 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 04:14:30,413 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;@6f65a7c2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 04:14:30,413 INFO L358 AbstractCegarLoop]: Starting to check reachability of 50 error locations. [2023-08-30 04:14:30,414 INFO L130 PetriNetUnfolder]: 1/5 cut-off events. [2023-08-30 04:14:30,414 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:14:30,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:14:30,415 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 04:14:30,415 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-08-30 04:14:30,415 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:14:30,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1512740, now seen corresponding path program 1 times [2023-08-30 04:14:30,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:14:30,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171572154] [2023-08-30 04:14:30,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:14:30,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:14:30,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:14:30,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:14:30,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:14:30,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171572154] [2023-08-30 04:14:30,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171572154] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:14:30,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:14:30,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:14:30,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938833585] [2023-08-30 04:14:30,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:14:30,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:14:30,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:14:30,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:14:30,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:14:30,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 251 out of 567 [2023-08-30 04:14:30,439 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 141 transitions, 300 flow. Second operand has 3 states, 3 states have (on average 252.0) internal successors, (756), 3 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:14:30,439 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:14:30,439 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 251 of 567 [2023-08-30 04:14:30,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:14:33,604 INFO L130 PetriNetUnfolder]: 31460/50386 cut-off events. [2023-08-30 04:14:33,605 INFO L131 PetriNetUnfolder]: For 182/182 co-relation queries the response was YES. [2023-08-30 04:14:33,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95798 conditions, 50386 events. 31460/50386 cut-off events. For 182/182 co-relation queries the response was YES. Maximal size of possible extension queue 1885. Compared 413483 event pairs, 28000 based on Foata normal form. 3730/36598 useless extension candidates. Maximal degree in co-relation 38606. Up to 45273 conditions per place. [2023-08-30 04:14:33,817 INFO L137 encePairwiseOnDemand]: 525/567 looper letters, 81 selfloop transitions, 2 changer transitions 0/103 dead transitions. [2023-08-30 04:14:33,817 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 103 transitions, 390 flow [2023-08-30 04:14:33,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:14:33,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:14:33,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 876 transitions. [2023-08-30 04:14:33,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5149911816578483 [2023-08-30 04:14:33,820 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 876 transitions. [2023-08-30 04:14:33,820 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 876 transitions. [2023-08-30 04:14:33,820 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:14:33,820 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 876 transitions. [2023-08-30 04:14:33,822 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 292.0) internal successors, (876), 3 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:14:33,823 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 567.0) internal successors, (2268), 4 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:14:33,824 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 567.0) internal successors, (2268), 4 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:14:33,824 INFO L175 Difference]: Start difference. First operand has 106 places, 141 transitions, 300 flow. Second operand 3 states and 876 transitions. [2023-08-30 04:14:33,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 103 transitions, 390 flow [2023-08-30 04:14:33,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 103 transitions, 390 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 04:14:33,825 INFO L231 Difference]: Finished difference. Result has 101 places, 103 transitions, 234 flow [2023-08-30 04:14:33,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=567, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=234, PETRI_PLACES=101, PETRI_TRANSITIONS=103} [2023-08-30 04:14:33,826 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -5 predicate places. [2023-08-30 04:14:33,827 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 103 transitions, 234 flow [2023-08-30 04:14:33,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 252.0) internal successors, (756), 3 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:14:33,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:14:33,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 04:14:33,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 04:14:33,827 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-08-30 04:14:33,827 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:14:33,827 INFO L85 PathProgramCache]: Analyzing trace with hash 46911340, now seen corresponding path program 1 times [2023-08-30 04:14:33,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:14:33,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221000959] [2023-08-30 04:14:33,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:14:33,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:14:33,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:14:33,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:14:33,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:14:33,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221000959] [2023-08-30 04:14:33,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221000959] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:14:33,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702919706] [2023-08-30 04:14:33,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:14:33,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:14:33,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:14:33,858 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 04:14:33,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 04:14:33,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:14:33,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 04:14:33,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:14:33,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:14:33,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:14:33,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:14:33,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702919706] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:14:33,923 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 04:14:33,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-08-30 04:14:33,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972594755] [2023-08-30 04:14:33,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 04:14:33,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 04:14:33,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:14:33,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 04:14:33,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-30 04:14:33,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 567 [2023-08-30 04:14:33,937 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 103 transitions, 234 flow. Second operand has 6 states, 6 states have (on average 251.16666666666666) internal successors, (1507), 6 states have internal predecessors, (1507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:14:33,937 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:14:33,937 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 567 [2023-08-30 04:14:33,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:14:37,224 INFO L130 PetriNetUnfolder]: 31460/50389 cut-off events. [2023-08-30 04:14:37,224 INFO L131 PetriNetUnfolder]: For 182/182 co-relation queries the response was YES. [2023-08-30 04:14:37,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95814 conditions, 50389 events. 31460/50389 cut-off events. For 182/182 co-relation queries the response was YES. Maximal size of possible extension queue 1885. Compared 413520 event pairs, 28000 based on Foata normal form. 0/32871 useless extension candidates. Maximal degree in co-relation 95801. Up to 45273 conditions per place. [2023-08-30 04:14:37,604 INFO L137 encePairwiseOnDemand]: 564/567 looper letters, 81 selfloop transitions, 5 changer transitions 0/106 dead transitions. [2023-08-30 04:14:37,604 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 106 transitions, 418 flow [2023-08-30 04:14:37,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 04:14:37,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 04:14:37,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1589 transitions. [2023-08-30 04:14:37,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4670781893004115 [2023-08-30 04:14:37,609 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1589 transitions. [2023-08-30 04:14:37,609 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1589 transitions. [2023-08-30 04:14:37,610 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:14:37,610 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1589 transitions. [2023-08-30 04:14:37,613 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 264.8333333333333) internal successors, (1589), 6 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) [2023-08-30 04:14:37,617 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 567.0) internal successors, (3969), 7 states have internal predecessors, (3969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:14:37,618 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 567.0) internal successors, (3969), 7 states have internal predecessors, (3969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:14:37,619 INFO L175 Difference]: Start difference. First operand has 101 places, 103 transitions, 234 flow. Second operand 6 states and 1589 transitions. [2023-08-30 04:14:37,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 106 transitions, 418 flow [2023-08-30 04:14:37,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 106 transitions, 414 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 04:14:37,621 INFO L231 Difference]: Finished difference. Result has 108 places, 106 transitions, 266 flow [2023-08-30 04:14:37,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=567, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=266, PETRI_PLACES=108, PETRI_TRANSITIONS=106} [2023-08-30 04:14:37,623 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 2 predicate places. [2023-08-30 04:14:37,623 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 106 transitions, 266 flow [2023-08-30 04:14:37,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 251.16666666666666) internal successors, (1507), 6 states have internal predecessors, (1507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:14:37,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:14:37,625 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-08-30 04:14:37,636 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-30 04:14:37,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:14:37,830 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-08-30 04:14:37,830 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:14:37,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1687674723, now seen corresponding path program 2 times [2023-08-30 04:14:37,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:14:37,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435994536] [2023-08-30 04:14:37,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:14:37,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:14:37,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:14:37,879 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:14:37,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:14:37,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435994536] [2023-08-30 04:14:37,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435994536] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:14:37,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436695842] [2023-08-30 04:14:37,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 04:14:37,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:14:37,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:14:37,899 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 04:14:37,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 04:14:37,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 04:14:37,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 04:14:37,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 04:14:37,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:14:37,969 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 [2023-08-30 04:14:37,979 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 04:14:37,979 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:14:37,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436695842] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:14:37,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 04:14:37,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 8 [2023-08-30 04:14:37,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523156562] [2023-08-30 04:14:37,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:14:37,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:14:37,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:14:37,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:14:37,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-30 04:14:38,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 567 [2023-08-30 04:14:38,049 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 106 transitions, 266 flow. Second operand has 3 states, 3 states have (on average 251.33333333333334) internal successors, (754), 3 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:14:38,049 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:14:38,050 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 567 [2023-08-30 04:14:38,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:14:40,781 INFO L130 PetriNetUnfolder]: 31047/50336 cut-off events. [2023-08-30 04:14:40,781 INFO L131 PetriNetUnfolder]: For 134/134 co-relation queries the response was YES. [2023-08-30 04:14:40,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95780 conditions, 50336 events. 31047/50336 cut-off events. For 134/134 co-relation queries the response was YES. Maximal size of possible extension queue 1866. Compared 422924 event pairs, 13480 based on Foata normal form. 0/32761 useless extension candidates. Maximal degree in co-relation 95745. Up to 45228 conditions per place. [2023-08-30 04:14:41,120 INFO L137 encePairwiseOnDemand]: 563/567 looper letters, 110 selfloop transitions, 2 changer transitions 0/132 dead transitions. [2023-08-30 04:14:41,121 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 132 transitions, 542 flow [2023-08-30 04:14:41,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:14:41,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:14:41,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 860 transitions. [2023-08-30 04:14:41,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5055849500293945 [2023-08-30 04:14:41,123 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 860 transitions. [2023-08-30 04:14:41,123 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 860 transitions. [2023-08-30 04:14:41,123 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:14:41,124 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 860 transitions. [2023-08-30 04:14:41,125 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 286.6666666666667) internal successors, (860), 3 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:14:41,126 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 567.0) internal successors, (2268), 4 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:14:41,127 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 567.0) internal successors, (2268), 4 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:14:41,127 INFO L175 Difference]: Start difference. First operand has 108 places, 106 transitions, 266 flow. Second operand 3 states and 860 transitions. [2023-08-30 04:14:41,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 132 transitions, 542 flow [2023-08-30 04:14:41,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 132 transitions, 528 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-30 04:14:41,129 INFO L231 Difference]: Finished difference. Result has 110 places, 107 transitions, 266 flow [2023-08-30 04:14:41,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=567, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=266, PETRI_PLACES=110, PETRI_TRANSITIONS=107} [2023-08-30 04:14:41,130 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 4 predicate places. [2023-08-30 04:14:41,130 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 107 transitions, 266 flow [2023-08-30 04:14:41,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 251.33333333333334) internal successors, (754), 3 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:14:41,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:14:41,131 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-08-30 04:14:41,151 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-30 04:14:41,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-08-30 04:14:41,335 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-08-30 04:14:41,335 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:14:41,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1687674724, now seen corresponding path program 1 times [2023-08-30 04:14:41,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:14:41,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34372828] [2023-08-30 04:14:41,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:14:41,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:14:41,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:14:41,356 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 04:14:41,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:14:41,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34372828] [2023-08-30 04:14:41,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34372828] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:14:41,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:14:41,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:14:41,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277757919] [2023-08-30 04:14:41,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:14:41,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:14:41,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:14:41,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:14:41,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:14:41,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 247 out of 567 [2023-08-30 04:14:41,415 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 107 transitions, 266 flow. Second operand has 3 states, 3 states have (on average 248.33333333333334) internal successors, (745), 3 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:14:41,415 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:14:41,415 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 247 of 567 [2023-08-30 04:14:41,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:14:44,383 INFO L130 PetriNetUnfolder]: 29409/46588 cut-off events. [2023-08-30 04:14:44,383 INFO L131 PetriNetUnfolder]: For 1198/1198 co-relation queries the response was YES. [2023-08-30 04:14:44,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90507 conditions, 46588 events. 29409/46588 cut-off events. For 1198/1198 co-relation queries the response was YES. Maximal size of possible extension queue 1727. Compared 375070 event pairs, 24164 based on Foata normal form. 0/31317 useless extension candidates. Maximal degree in co-relation 90477. Up to 39138 conditions per place. [2023-08-30 04:14:44,680 INFO L137 encePairwiseOnDemand]: 562/567 looper letters, 126 selfloop transitions, 3 changer transitions 0/149 dead transitions. [2023-08-30 04:14:44,681 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 149 transitions, 608 flow [2023-08-30 04:14:44,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:14:44,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:14:44,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 867 transitions. [2023-08-30 04:14:44,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5097001763668431 [2023-08-30 04:14:44,684 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 867 transitions. [2023-08-30 04:14:44,684 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 867 transitions. [2023-08-30 04:14:44,685 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:14:44,685 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 867 transitions. [2023-08-30 04:14:44,687 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 289.0) internal successors, (867), 3 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:14:44,689 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 567.0) internal successors, (2268), 4 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:14:44,690 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 567.0) internal successors, (2268), 4 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:14:44,690 INFO L175 Difference]: Start difference. First operand has 110 places, 107 transitions, 266 flow. Second operand 3 states and 867 transitions. [2023-08-30 04:14:44,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 149 transitions, 608 flow [2023-08-30 04:14:44,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 149 transitions, 606 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 04:14:44,695 INFO L231 Difference]: Finished difference. Result has 109 places, 105 transitions, 266 flow [2023-08-30 04:14:44,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=567, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=266, PETRI_PLACES=109, PETRI_TRANSITIONS=105} [2023-08-30 04:14:44,696 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 3 predicate places. [2023-08-30 04:14:44,696 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 105 transitions, 266 flow [2023-08-30 04:14:44,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 248.33333333333334) internal successors, (745), 3 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:14:44,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:14:44,697 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:14:44,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-30 04:14:44,697 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-08-30 04:14:44,698 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:14:44,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1889715627, now seen corresponding path program 1 times [2023-08-30 04:14:44,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:14:44,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921206226] [2023-08-30 04:14:44,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:14:44,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:14:44,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:14:44,756 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 04:14:44,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:14:44,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921206226] [2023-08-30 04:14:44,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921206226] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:14:44,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629248662] [2023-08-30 04:14:44,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:14:44,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:14:44,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:14:44,759 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 04:14:44,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 04:14:44,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:14:44,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 04:14:44,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:14:44,846 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 04:14:44,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:14:44,893 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 04:14:44,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629248662] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:14:44,894 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 04:14:44,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-08-30 04:14:44,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557544798] [2023-08-30 04:14:44,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 04:14:44,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 04:14:44,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:14:44,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 04:14:44,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-08-30 04:14:44,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 567 [2023-08-30 04:14:44,932 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 105 transitions, 266 flow. Second operand has 12 states, 12 states have (on average 251.33333333333334) internal successors, (3016), 12 states have internal predecessors, (3016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:14:44,932 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:14:44,932 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 567 [2023-08-30 04:14:44,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:14:48,271 INFO L130 PetriNetUnfolder]: 29495/46914 cut-off events. [2023-08-30 04:14:48,271 INFO L131 PetriNetUnfolder]: For 1751/1751 co-relation queries the response was YES. [2023-08-30 04:14:48,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91885 conditions, 46914 events. 29495/46914 cut-off events. For 1751/1751 co-relation queries the response was YES. Maximal size of possible extension queue 1735. Compared 377654 event pairs, 26092 based on Foata normal form. 6/32199 useless extension candidates. Maximal degree in co-relation 91831. Up to 42217 conditions per place. [2023-08-30 04:14:48,565 INFO L137 encePairwiseOnDemand]: 564/567 looper letters, 80 selfloop transitions, 11 changer transitions 0/111 dead transitions. [2023-08-30 04:14:48,565 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 111 transitions, 484 flow [2023-08-30 04:14:48,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 04:14:48,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 04:14:48,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3096 transitions. [2023-08-30 04:14:48,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2023-08-30 04:14:48,571 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3096 transitions. [2023-08-30 04:14:48,571 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3096 transitions. [2023-08-30 04:14:48,572 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:14:48,572 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3096 transitions. [2023-08-30 04:14:48,576 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 258.0) internal successors, (3096), 12 states have internal predecessors, (3096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:14:48,582 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 567.0) internal successors, (7371), 13 states have internal predecessors, (7371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:14:48,583 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 567.0) internal successors, (7371), 13 states have internal predecessors, (7371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:14:48,583 INFO L175 Difference]: Start difference. First operand has 109 places, 105 transitions, 266 flow. Second operand 12 states and 3096 transitions. [2023-08-30 04:14:48,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 111 transitions, 484 flow [2023-08-30 04:14:48,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 111 transitions, 478 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:14:48,591 INFO L231 Difference]: Finished difference. Result has 124 places, 111 transitions, 344 flow [2023-08-30 04:14:48,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=567, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=344, PETRI_PLACES=124, PETRI_TRANSITIONS=111} [2023-08-30 04:14:48,592 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 18 predicate places. [2023-08-30 04:14:48,592 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 111 transitions, 344 flow [2023-08-30 04:14:48,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 251.33333333333334) internal successors, (3016), 12 states have internal predecessors, (3016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:14:48,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:14:48,593 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:14:48,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-30 04:14:48,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:14:48,798 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-08-30 04:14:48,798 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:14:48,798 INFO L85 PathProgramCache]: Analyzing trace with hash -572367435, now seen corresponding path program 2 times [2023-08-30 04:14:48,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:14:48,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500775588] [2023-08-30 04:14:48,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:14:48,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:14:48,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:14:48,882 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 04:14:48,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:14:48,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500775588] [2023-08-30 04:14:48,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500775588] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:14:48,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581821467] [2023-08-30 04:14:48,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 04:14:48,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:14:48,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:14:48,884 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 04:14:48,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 04:14:49,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 04:14:49,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 04:14:49,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 04:14:49,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:14:49,013 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 [2023-08-30 04:14:49,057 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 04:14:49,058 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:14:49,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581821467] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:14:49,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 04:14:49,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-30 04:14:49,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768516692] [2023-08-30 04:14:49,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:14:49,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 04:14:49,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:14:49,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 04:14:49,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 04:14:49,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 249 out of 567 [2023-08-30 04:14:49,181 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 111 transitions, 344 flow. Second operand has 4 states, 4 states have (on average 250.75) internal successors, (1003), 4 states have internal predecessors, (1003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:14:49,181 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:14:49,181 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 249 of 567 [2023-08-30 04:14:49,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:14:52,336 INFO L130 PetriNetUnfolder]: 28421/44913 cut-off events. [2023-08-30 04:14:52,337 INFO L131 PetriNetUnfolder]: For 1182/1182 co-relation queries the response was YES. [2023-08-30 04:14:52,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86866 conditions, 44913 events. 28421/44913 cut-off events. For 1182/1182 co-relation queries the response was YES. Maximal size of possible extension queue 1659. Compared 359425 event pairs, 17159 based on Foata normal form. 0/30591 useless extension candidates. Maximal degree in co-relation 86788. Up to 37617 conditions per place. [2023-08-30 04:14:52,684 INFO L137 encePairwiseOnDemand]: 562/567 looper letters, 154 selfloop transitions, 4 changer transitions 0/178 dead transitions. [2023-08-30 04:14:52,684 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 178 transitions, 792 flow [2023-08-30 04:14:52,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 04:14:52,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 04:14:52,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1145 transitions. [2023-08-30 04:14:52,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5048500881834215 [2023-08-30 04:14:52,709 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1145 transitions. [2023-08-30 04:14:52,709 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1145 transitions. [2023-08-30 04:14:52,710 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:14:52,710 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1145 transitions. [2023-08-30 04:14:52,712 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 286.25) internal successors, (1145), 4 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:14:52,716 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 567.0) internal successors, (2835), 5 states have internal predecessors, (2835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:14:52,716 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 567.0) internal successors, (2835), 5 states have internal predecessors, (2835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:14:52,716 INFO L175 Difference]: Start difference. First operand has 124 places, 111 transitions, 344 flow. Second operand 4 states and 1145 transitions. [2023-08-30 04:14:52,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 178 transitions, 792 flow [2023-08-30 04:14:52,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 178 transitions, 744 flow, removed 19 selfloop flow, removed 5 redundant places. [2023-08-30 04:14:52,725 INFO L231 Difference]: Finished difference. Result has 121 places, 110 transitions, 300 flow [2023-08-30 04:14:52,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=567, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=300, PETRI_PLACES=121, PETRI_TRANSITIONS=110} [2023-08-30 04:14:52,727 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 15 predicate places. [2023-08-30 04:14:52,727 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 110 transitions, 300 flow [2023-08-30 04:14:52,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 250.75) internal successors, (1003), 4 states have internal predecessors, (1003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:14:52,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:14:52,728 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:14:52,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-30 04:14:52,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:14:52,929 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-08-30 04:14:52,929 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:14:52,930 INFO L85 PathProgramCache]: Analyzing trace with hash -552046726, now seen corresponding path program 1 times [2023-08-30 04:14:52,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:14:52,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400693683] [2023-08-30 04:14:52,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:14:52,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:14:52,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:14:53,137 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 04:14:53,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:14:53,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400693683] [2023-08-30 04:14:53,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400693683] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:14:53,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:14:53,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 04:14:53,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705868945] [2023-08-30 04:14:53,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:14:53,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 04:14:53,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:14:53,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 04:14:53,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-30 04:14:53,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 567 [2023-08-30 04:14:53,585 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 110 transitions, 300 flow. Second operand has 7 states, 7 states have (on average 238.28571428571428) internal successors, (1668), 7 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:14:53,585 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:14:53,585 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 567 [2023-08-30 04:14:53,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:14:59,421 INFO L130 PetriNetUnfolder]: 52316/82675 cut-off events. [2023-08-30 04:14:59,422 INFO L131 PetriNetUnfolder]: For 3273/3273 co-relation queries the response was YES. [2023-08-30 04:14:59,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163026 conditions, 82675 events. 52316/82675 cut-off events. For 3273/3273 co-relation queries the response was YES. Maximal size of possible extension queue 2761. Compared 718299 event pairs, 22659 based on Foata normal form. 1190/58742 useless extension candidates. Maximal degree in co-relation 162972. Up to 37643 conditions per place. [2023-08-30 04:15:00,286 INFO L137 encePairwiseOnDemand]: 556/567 looper letters, 376 selfloop transitions, 18 changer transitions 0/414 dead transitions. [2023-08-30 04:15:00,286 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 414 transitions, 1759 flow [2023-08-30 04:15:00,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 04:15:00,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 04:15:00,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2758 transitions. [2023-08-30 04:15:00,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48641975308641977 [2023-08-30 04:15:00,293 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2758 transitions. [2023-08-30 04:15:00,293 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2758 transitions. [2023-08-30 04:15:00,294 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:15:00,294 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2758 transitions. [2023-08-30 04:15:00,298 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 275.8) internal successors, (2758), 10 states have internal predecessors, (2758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:00,304 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 567.0) internal successors, (6237), 11 states have internal predecessors, (6237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:00,305 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 567.0) internal successors, (6237), 11 states have internal predecessors, (6237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:00,305 INFO L175 Difference]: Start difference. First operand has 121 places, 110 transitions, 300 flow. Second operand 10 states and 2758 transitions. [2023-08-30 04:15:00,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 414 transitions, 1759 flow [2023-08-30 04:15:00,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 414 transitions, 1733 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 04:15:00,319 INFO L231 Difference]: Finished difference. Result has 131 places, 124 transitions, 396 flow [2023-08-30 04:15:00,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=567, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=396, PETRI_PLACES=131, PETRI_TRANSITIONS=124} [2023-08-30 04:15:00,319 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 25 predicate places. [2023-08-30 04:15:00,320 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 124 transitions, 396 flow [2023-08-30 04:15:00,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 238.28571428571428) internal successors, (1668), 7 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:00,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:15:00,320 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:15:00,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-30 04:15:00,321 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-08-30 04:15:00,321 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:15:00,321 INFO L85 PathProgramCache]: Analyzing trace with hash 66418250, now seen corresponding path program 1 times [2023-08-30 04:15:00,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:15:00,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158749428] [2023-08-30 04:15:00,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:15:00,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:15:00,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:15:00,431 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 04:15:00,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:15:00,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158749428] [2023-08-30 04:15:00,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158749428] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:15:00,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:15:00,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 04:15:00,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651312785] [2023-08-30 04:15:00,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:15:00,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 04:15:00,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:15:00,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 04:15:00,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-30 04:15:00,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 567 [2023-08-30 04:15:00,776 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 124 transitions, 396 flow. Second operand has 6 states, 6 states have (on average 236.66666666666666) internal successors, (1420), 6 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:00,776 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:15:00,776 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 567 [2023-08-30 04:15:00,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:15:06,296 INFO L130 PetriNetUnfolder]: 43486/69763 cut-off events. [2023-08-30 04:15:06,297 INFO L131 PetriNetUnfolder]: For 11819/11819 co-relation queries the response was YES. [2023-08-30 04:15:06,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150379 conditions, 69763 events. 43486/69763 cut-off events. For 11819/11819 co-relation queries the response was YES. Maximal size of possible extension queue 2360. Compared 612257 event pairs, 1510 based on Foata normal form. 0/53400 useless extension candidates. Maximal degree in co-relation 150320. Up to 54654 conditions per place. [2023-08-30 04:15:06,946 INFO L137 encePairwiseOnDemand]: 552/567 looper letters, 208 selfloop transitions, 20 changer transitions 0/247 dead transitions. [2023-08-30 04:15:06,947 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 247 transitions, 1155 flow [2023-08-30 04:15:06,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 04:15:06,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 04:15:06,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1386 transitions. [2023-08-30 04:15:06,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4888888888888889 [2023-08-30 04:15:06,970 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1386 transitions. [2023-08-30 04:15:06,971 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1386 transitions. [2023-08-30 04:15:06,971 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:15:06,971 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1386 transitions. [2023-08-30 04:15:06,973 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 277.2) internal successors, (1386), 5 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:06,975 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 567.0) internal successors, (3402), 6 states have internal predecessors, (3402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:06,976 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 567.0) internal successors, (3402), 6 states have internal predecessors, (3402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:06,976 INFO L175 Difference]: Start difference. First operand has 131 places, 124 transitions, 396 flow. Second operand 5 states and 1386 transitions. [2023-08-30 04:15:06,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 247 transitions, 1155 flow [2023-08-30 04:15:07,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 247 transitions, 1154 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 04:15:07,782 INFO L231 Difference]: Finished difference. Result has 137 places, 134 transitions, 529 flow [2023-08-30 04:15:07,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=567, PETRI_DIFFERENCE_MINUEND_FLOW=395, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=529, PETRI_PLACES=137, PETRI_TRANSITIONS=134} [2023-08-30 04:15:07,783 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 31 predicate places. [2023-08-30 04:15:07,783 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 134 transitions, 529 flow [2023-08-30 04:15:07,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 236.66666666666666) internal successors, (1420), 6 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:07,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:15:07,784 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:15:07,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-30 04:15:07,784 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-08-30 04:15:07,784 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:15:07,784 INFO L85 PathProgramCache]: Analyzing trace with hash -289304113, now seen corresponding path program 1 times [2023-08-30 04:15:07,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:15:07,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409295516] [2023-08-30 04:15:07,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:15:07,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:15:07,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:15:07,827 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-08-30 04:15:07,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:15:07,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409295516] [2023-08-30 04:15:07,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409295516] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:15:07,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:15:07,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 04:15:07,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101493471] [2023-08-30 04:15:07,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:15:07,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:15:07,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:15:07,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:15:07,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:15:07,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 567 [2023-08-30 04:15:07,838 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 134 transitions, 529 flow. Second operand has 3 states, 3 states have (on average 253.0) internal successors, (759), 3 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:07,838 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:15:07,838 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 567 [2023-08-30 04:15:07,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:15:17,714 INFO L130 PetriNetUnfolder]: 73690/117532 cut-off events. [2023-08-30 04:15:17,715 INFO L131 PetriNetUnfolder]: For 49335/49335 co-relation queries the response was YES. [2023-08-30 04:15:18,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267204 conditions, 117532 events. 73690/117532 cut-off events. For 49335/49335 co-relation queries the response was YES. Maximal size of possible extension queue 3510. Compared 1052398 event pairs, 39172 based on Foata normal form. 0/91279 useless extension candidates. Maximal degree in co-relation 267141. Up to 64589 conditions per place. [2023-08-30 04:15:18,842 INFO L137 encePairwiseOnDemand]: 564/567 looper letters, 174 selfloop transitions, 2 changer transitions 0/196 dead transitions. [2023-08-30 04:15:18,843 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 196 transitions, 1054 flow [2023-08-30 04:15:18,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:15:18,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:15:18,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 889 transitions. [2023-08-30 04:15:18,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.522633744855967 [2023-08-30 04:15:18,845 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 889 transitions. [2023-08-30 04:15:18,845 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 889 transitions. [2023-08-30 04:15:18,845 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:15:18,845 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 889 transitions. [2023-08-30 04:15:18,847 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 296.3333333333333) internal successors, (889), 3 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:18,848 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 567.0) internal successors, (2268), 4 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:18,849 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 567.0) internal successors, (2268), 4 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:18,849 INFO L175 Difference]: Start difference. First operand has 137 places, 134 transitions, 529 flow. Second operand 3 states and 889 transitions. [2023-08-30 04:15:18,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 196 transitions, 1054 flow [2023-08-30 04:15:18,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 196 transitions, 1054 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 04:15:18,993 INFO L231 Difference]: Finished difference. Result has 140 places, 135 transitions, 541 flow [2023-08-30 04:15:18,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=567, PETRI_DIFFERENCE_MINUEND_FLOW=529, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=541, PETRI_PLACES=140, PETRI_TRANSITIONS=135} [2023-08-30 04:15:18,994 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 34 predicate places. [2023-08-30 04:15:18,994 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 135 transitions, 541 flow [2023-08-30 04:15:18,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 253.0) internal successors, (759), 3 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:18,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:15:18,994 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:15:18,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-30 04:15:18,994 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t_funErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-08-30 04:15:18,995 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:15:18,995 INFO L85 PathProgramCache]: Analyzing trace with hash 66418631, now seen corresponding path program 1 times [2023-08-30 04:15:18,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:15:18,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804677009] [2023-08-30 04:15:18,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:15:18,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:15:19,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:15:19,103 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 04:15:19,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:15:19,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804677009] [2023-08-30 04:15:19,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804677009] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:15:19,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:15:19,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 04:15:19,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292321033] [2023-08-30 04:15:19,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:15:19,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 04:15:19,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:15:19,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 04:15:19,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-30 04:15:19,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 567 [2023-08-30 04:15:19,348 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 135 transitions, 541 flow. Second operand has 6 states, 6 states have (on average 239.66666666666666) internal successors, (1438), 6 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:19,348 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:15:19,348 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 567 [2023-08-30 04:15:19,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:15:37,052 INFO L130 PetriNetUnfolder]: 133621/212173 cut-off events. [2023-08-30 04:15:37,052 INFO L131 PetriNetUnfolder]: For 89776/90076 co-relation queries the response was YES. [2023-08-30 04:15:38,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 500616 conditions, 212173 events. 133621/212173 cut-off events. For 89776/90076 co-relation queries the response was YES. Maximal size of possible extension queue 6910. Compared 2026574 event pairs, 21774 based on Foata normal form. 90/164359 useless extension candidates. Maximal degree in co-relation 500551. Up to 110702 conditions per place. [2023-08-30 04:15:39,267 INFO L137 encePairwiseOnDemand]: 554/567 looper letters, 328 selfloop transitions, 52 changer transitions 0/400 dead transitions. [2023-08-30 04:15:39,268 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 400 transitions, 2281 flow [2023-08-30 04:15:39,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 04:15:39,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 04:15:39,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1969 transitions. [2023-08-30 04:15:39,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4960947341899723 [2023-08-30 04:15:39,271 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1969 transitions. [2023-08-30 04:15:39,272 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1969 transitions. [2023-08-30 04:15:39,272 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:15:39,273 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1969 transitions. [2023-08-30 04:15:39,275 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 281.2857142857143) internal successors, (1969), 7 states have internal predecessors, (1969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:39,278 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 567.0) internal successors, (4536), 8 states have internal predecessors, (4536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:39,279 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 567.0) internal successors, (4536), 8 states have internal predecessors, (4536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:39,279 INFO L175 Difference]: Start difference. First operand has 140 places, 135 transitions, 541 flow. Second operand 7 states and 1969 transitions. [2023-08-30 04:15:39,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 400 transitions, 2281 flow [2023-08-30 04:15:43,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 400 transitions, 2273 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 04:15:43,613 INFO L231 Difference]: Finished difference. Result has 150 places, 185 transitions, 1080 flow [2023-08-30 04:15:43,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=567, PETRI_DIFFERENCE_MINUEND_FLOW=539, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1080, PETRI_PLACES=150, PETRI_TRANSITIONS=185} [2023-08-30 04:15:43,614 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 44 predicate places. [2023-08-30 04:15:43,614 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 185 transitions, 1080 flow [2023-08-30 04:15:43,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 239.66666666666666) internal successors, (1438), 6 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:43,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:15:43,615 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:15:43,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-30 04:15:43,615 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-08-30 04:15:43,615 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:15:43,615 INFO L85 PathProgramCache]: Analyzing trace with hash -378370955, now seen corresponding path program 1 times [2023-08-30 04:15:43,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:15:43,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461760141] [2023-08-30 04:15:43,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:15:43,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:15:43,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:15:43,648 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 04:15:43,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:15:43,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461760141] [2023-08-30 04:15:43,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461760141] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:15:43,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138939814] [2023-08-30 04:15:43,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:15:43,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:15:43,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:15:43,651 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 04:15:43,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-30 04:15:43,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:15:43,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 04:15:43,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:15:43,743 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 04:15:43,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:15:43,755 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 04:15:43,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138939814] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:15:43,755 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 04:15:43,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-08-30 04:15:43,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125570910] [2023-08-30 04:15:43,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 04:15:43,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 04:15:43,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:15:43,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 04:15:43,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 04:15:43,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 567 [2023-08-30 04:15:43,772 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 185 transitions, 1080 flow. Second operand has 7 states, 7 states have (on average 252.71428571428572) internal successors, (1769), 7 states have internal predecessors, (1769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:43,773 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:15:43,773 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 567 [2023-08-30 04:15:43,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:15:45,001 INFO L130 PetriNetUnfolder]: 8174/14409 cut-off events. [2023-08-30 04:15:45,002 INFO L131 PetriNetUnfolder]: For 14251/14257 co-relation queries the response was YES. [2023-08-30 04:15:45,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41882 conditions, 14409 events. 8174/14409 cut-off events. For 14251/14257 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 112542 event pairs, 507 based on Foata normal form. 1554/14149 useless extension candidates. Maximal degree in co-relation 41852. Up to 9328 conditions per place. [2023-08-30 04:15:45,287 INFO L137 encePairwiseOnDemand]: 564/567 looper letters, 158 selfloop transitions, 3 changer transitions 0/174 dead transitions. [2023-08-30 04:15:45,287 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 174 transitions, 1125 flow [2023-08-30 04:15:45,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 04:15:45,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 04:15:45,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1361 transitions. [2023-08-30 04:15:45,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4800705467372134 [2023-08-30 04:15:45,290 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1361 transitions. [2023-08-30 04:15:45,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1361 transitions. [2023-08-30 04:15:45,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:15:45,290 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1361 transitions. [2023-08-30 04:15:45,292 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 272.2) internal successors, (1361), 5 states have internal predecessors, (1361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:45,294 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 567.0) internal successors, (3402), 6 states have internal predecessors, (3402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:45,295 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 567.0) internal successors, (3402), 6 states have internal predecessors, (3402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:45,295 INFO L175 Difference]: Start difference. First operand has 150 places, 185 transitions, 1080 flow. Second operand 5 states and 1361 transitions. [2023-08-30 04:15:45,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 174 transitions, 1125 flow [2023-08-30 04:15:45,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 174 transitions, 1018 flow, removed 44 selfloop flow, removed 9 redundant places. [2023-08-30 04:15:45,320 INFO L231 Difference]: Finished difference. Result has 104 places, 89 transitions, 362 flow [2023-08-30 04:15:45,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=567, PETRI_DIFFERENCE_MINUEND_FLOW=356, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=362, PETRI_PLACES=104, PETRI_TRANSITIONS=89} [2023-08-30 04:15:45,321 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -2 predicate places. [2023-08-30 04:15:45,321 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 89 transitions, 362 flow [2023-08-30 04:15:45,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 252.71428571428572) internal successors, (1769), 7 states have internal predecessors, (1769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:45,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:15:45,321 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1] [2023-08-30 04:15:45,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-30 04:15:45,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-30 04:15:45,526 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-08-30 04:15:45,526 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:15:45,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1344679486, now seen corresponding path program 1 times [2023-08-30 04:15:45,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:15:45,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803475143] [2023-08-30 04:15:45,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:15:45,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:15:45,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:15:45,548 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 04:15:45,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:15:45,573 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 04:15:45,574 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 04:15:45,574 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (49 of 50 remaining) [2023-08-30 04:15:45,574 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 50 remaining) [2023-08-30 04:15:45,574 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 50 remaining) [2023-08-30 04:15:45,574 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 50 remaining) [2023-08-30 04:15:45,574 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 50 remaining) [2023-08-30 04:15:45,575 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK (44 of 50 remaining) [2023-08-30 04:15:45,575 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 50 remaining) [2023-08-30 04:15:45,575 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 50 remaining) [2023-08-30 04:15:45,575 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 50 remaining) [2023-08-30 04:15:45,575 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 50 remaining) [2023-08-30 04:15:45,575 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 50 remaining) [2023-08-30 04:15:45,575 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 50 remaining) [2023-08-30 04:15:45,575 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 50 remaining) [2023-08-30 04:15:45,576 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 50 remaining) [2023-08-30 04:15:45,577 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 50 remaining) [2023-08-30 04:15:45,577 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 50 remaining) [2023-08-30 04:15:45,577 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (33 of 50 remaining) [2023-08-30 04:15:45,577 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 50 remaining) [2023-08-30 04:15:45,578 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 50 remaining) [2023-08-30 04:15:45,578 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 50 remaining) [2023-08-30 04:15:45,578 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 50 remaining) [2023-08-30 04:15:45,578 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 50 remaining) [2023-08-30 04:15:45,578 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 50 remaining) [2023-08-30 04:15:45,578 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 50 remaining) [2023-08-30 04:15:45,578 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 50 remaining) [2023-08-30 04:15:45,578 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 50 remaining) [2023-08-30 04:15:45,579 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 50 remaining) [2023-08-30 04:15:45,579 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (22 of 50 remaining) [2023-08-30 04:15:45,579 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 50 remaining) [2023-08-30 04:15:45,579 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 50 remaining) [2023-08-30 04:15:45,579 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 50 remaining) [2023-08-30 04:15:45,579 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 50 remaining) [2023-08-30 04:15:45,579 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 50 remaining) [2023-08-30 04:15:45,580 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 50 remaining) [2023-08-30 04:15:45,580 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 50 remaining) [2023-08-30 04:15:45,580 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 50 remaining) [2023-08-30 04:15:45,580 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 50 remaining) [2023-08-30 04:15:45,580 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 50 remaining) [2023-08-30 04:15:45,580 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (11 of 50 remaining) [2023-08-30 04:15:45,580 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 50 remaining) [2023-08-30 04:15:45,580 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 50 remaining) [2023-08-30 04:15:45,581 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 50 remaining) [2023-08-30 04:15:45,581 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 50 remaining) [2023-08-30 04:15:45,581 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 50 remaining) [2023-08-30 04:15:45,581 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 50 remaining) [2023-08-30 04:15:45,581 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 50 remaining) [2023-08-30 04:15:45,581 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 50 remaining) [2023-08-30 04:15:45,581 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 50 remaining) [2023-08-30 04:15:45,581 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 50 remaining) [2023-08-30 04:15:45,581 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (0 of 50 remaining) [2023-08-30 04:15:45,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-30 04:15:45,582 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:15:45,582 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 04:15:45,582 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-30 04:15:45,615 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 04:15:45,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 326 places, 382 transitions, 794 flow [2023-08-30 04:15:45,687 INFO L130 PetriNetUnfolder]: 120/775 cut-off events. [2023-08-30 04:15:45,687 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 04:15:45,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 803 conditions, 775 events. 120/775 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 4144 event pairs, 1 based on Foata normal form. 0/542 useless extension candidates. Maximal degree in co-relation 534. Up to 16 conditions per place. [2023-08-30 04:15:45,700 INFO L82 GeneralOperation]: Start removeDead. Operand has 326 places, 382 transitions, 794 flow [2023-08-30 04:15:45,711 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 326 places, 382 transitions, 794 flow [2023-08-30 04:15:45,711 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 04:15:45,711 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 326 places, 382 transitions, 794 flow [2023-08-30 04:15:45,712 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 326 places, 382 transitions, 794 flow [2023-08-30 04:15:45,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 326 places, 382 transitions, 794 flow [2023-08-30 04:15:45,784 INFO L130 PetriNetUnfolder]: 120/775 cut-off events. [2023-08-30 04:15:45,785 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 04:15:45,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 803 conditions, 775 events. 120/775 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 4144 event pairs, 1 based on Foata normal form. 0/542 useless extension candidates. Maximal degree in co-relation 534. Up to 16 conditions per place. [2023-08-30 04:15:45,823 INFO L119 LiptonReduction]: Number of co-enabled transitions 90060 [2023-08-30 04:15:49,778 INFO L134 LiptonReduction]: Checked pairs total: 191638 [2023-08-30 04:15:49,778 INFO L136 LiptonReduction]: Total number of compositions: 331 [2023-08-30 04:15:49,780 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 04:15:49,781 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;@6f65a7c2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 04:15:49,781 INFO L358 AbstractCegarLoop]: Starting to check reachability of 61 error locations. [2023-08-30 04:15:49,783 INFO L130 PetriNetUnfolder]: 1/4 cut-off events. [2023-08-30 04:15:49,783 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:15:49,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:15:49,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 04:15:49,783 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2023-08-30 04:15:49,784 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:15:49,784 INFO L85 PathProgramCache]: Analyzing trace with hash 2300715, now seen corresponding path program 1 times [2023-08-30 04:15:49,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:15:49,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101626064] [2023-08-30 04:15:49,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:15:49,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:15:49,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:15:49,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:15:49,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:15:49,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101626064] [2023-08-30 04:15:49,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101626064] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:15:49,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:15:49,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:15:49,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544933346] [2023-08-30 04:15:49,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:15:49,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:15:49,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:15:49,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:15:49,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:15:49,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 317 out of 713 [2023-08-30 04:15:49,821 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 183 transitions, 396 flow. Second operand has 3 states, 3 states have (on average 318.0) internal successors, (954), 3 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:49,821 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:15:49,821 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 317 of 713 [2023-08-30 04:15:49,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand