./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/pthread-ext/31_simple_loop5_vs.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/pthread-ext/31_simple_loop5_vs.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 3ace826ce717f8420bd44e3ebb10a0f5689c8f1d5dcaf8399a3f9b8d8dda146f --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 02:35:49,835 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 02:35:49,837 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 02:35:49,871 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 02:35:49,871 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 02:35:49,872 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 02:35:49,873 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 02:35:49,874 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 02:35:49,875 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 02:35:49,876 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 02:35:49,877 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 02:35:49,877 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 02:35:49,878 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 02:35:49,878 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 02:35:49,879 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 02:35:49,880 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 02:35:49,880 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 02:35:49,881 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 02:35:49,882 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 02:35:49,883 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 02:35:49,884 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 02:35:49,885 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 02:35:49,886 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 02:35:49,886 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 02:35:49,898 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 02:35:49,898 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 02:35:49,898 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 02:35:49,899 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 02:35:49,899 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 02:35:49,900 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 02:35:49,900 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 02:35:49,901 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 02:35:49,901 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 02:35:49,902 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 02:35:49,902 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 02:35:49,903 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 02:35:49,903 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 02:35:49,903 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 02:35:49,904 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 02:35:49,904 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 02:35:49,905 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 02:35:49,906 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 02:35:49,921 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 02:35:49,921 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 02:35:49,922 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 02:35:49,922 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 02:35:49,922 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 02:35:49,923 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 02:35:49,923 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 02:35:49,923 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 02:35:49,923 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 02:35:49,924 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 02:35:49,924 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 02:35:49,924 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 02:35:49,924 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 02:35:49,924 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 02:35:49,924 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 02:35:49,925 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 02:35:49,925 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 02:35:49,925 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 02:35:49,925 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 02:35:49,925 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 02:35:49,925 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 02:35:49,926 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 02:35:49,926 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 02:35:49,926 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 02:35:49,926 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 02:35:49,926 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 02:35:49,927 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 02:35:49,927 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 02:35:49,927 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 02:35:49,927 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 02:35:49,927 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 02:35:49,927 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 02:35:49,928 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 02:35:49,928 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 02:35:49,928 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3ace826ce717f8420bd44e3ebb10a0f5689c8f1d5dcaf8399a3f9b8d8dda146f Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 02:35:50,166 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 02:35:50,182 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 02:35:50,185 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 02:35:50,186 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 02:35:50,186 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 02:35:50,187 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/31_simple_loop5_vs.i [2023-08-30 02:35:51,217 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 02:35:51,454 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 02:35:51,466 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/31_simple_loop5_vs.i [2023-08-30 02:35:51,489 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d3e29bb0/fce0d7eac9e042fba95ceb30b117b1bf/FLAG2cea169e5 [2023-08-30 02:35:51,504 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d3e29bb0/fce0d7eac9e042fba95ceb30b117b1bf [2023-08-30 02:35:51,506 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 02:35:51,508 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 02:35:51,510 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 02:35:51,510 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 02:35:51,512 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 02:35:51,513 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 02:35:51" (1/1) ... [2023-08-30 02:35:51,515 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70c353f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:35:51, skipping insertion in model container [2023-08-30 02:35:51,515 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 02:35:51" (1/1) ... [2023-08-30 02:35:51,520 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 02:35:51,557 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 02:35:51,794 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/31_simple_loop5_vs.i[30438,30451] [2023-08-30 02:35:51,802 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 02:35:51,809 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 02:35:51,859 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/31_simple_loop5_vs.i[30438,30451] [2023-08-30 02:35:51,865 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 02:35:51,895 INFO L208 MainTranslator]: Completed translation [2023-08-30 02:35:51,895 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:35:51 WrapperNode [2023-08-30 02:35:51,895 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 02:35:51,897 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 02:35:51,897 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 02:35:51,897 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 02:35:51,902 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:35:51" (1/1) ... [2023-08-30 02:35:51,916 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:35:51" (1/1) ... [2023-08-30 02:35:51,930 INFO L138 Inliner]: procedures = 170, calls = 18, calls flagged for inlining = 8, calls inlined = 10, statements flattened = 83 [2023-08-30 02:35:51,931 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 02:35:51,931 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 02:35:51,931 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 02:35:51,932 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 02:35:51,937 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:35:51" (1/1) ... [2023-08-30 02:35:51,937 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:35:51" (1/1) ... [2023-08-30 02:35:51,939 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:35:51" (1/1) ... [2023-08-30 02:35:51,939 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:35:51" (1/1) ... [2023-08-30 02:35:51,943 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:35:51" (1/1) ... [2023-08-30 02:35:51,945 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:35:51" (1/1) ... [2023-08-30 02:35:51,947 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:35:51" (1/1) ... [2023-08-30 02:35:51,947 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:35:51" (1/1) ... [2023-08-30 02:35:51,949 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 02:35:51,950 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 02:35:51,950 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 02:35:51,950 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 02:35:51,950 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:35:51" (1/1) ... [2023-08-30 02:35:51,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 02:35:51,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 02:35:51,981 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 02:35:52,006 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 02:35:52,016 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2023-08-30 02:35:52,016 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2023-08-30 02:35:52,016 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-30 02:35:52,016 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-30 02:35:52,017 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 02:35:52,017 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 02:35:52,017 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 02:35:52,017 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 02:35:52,017 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 02:35:52,017 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 02:35:52,017 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 02:35:52,018 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 02:35:52,106 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 02:35:52,107 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 02:35:52,228 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 02:35:52,283 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 02:35:52,284 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-30 02:35:52,285 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 02:35:52 BoogieIcfgContainer [2023-08-30 02:35:52,286 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 02:35:52,287 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 02:35:52,287 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 02:35:52,289 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 02:35:52,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 02:35:51" (1/3) ... [2023-08-30 02:35:52,290 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c8abb0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 02:35:52, skipping insertion in model container [2023-08-30 02:35:52,290 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:35:51" (2/3) ... [2023-08-30 02:35:52,290 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c8abb0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 02:35:52, skipping insertion in model container [2023-08-30 02:35:52,290 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 02:35:52" (3/3) ... [2023-08-30 02:35:52,291 INFO L112 eAbstractionObserver]: Analyzing ICFG 31_simple_loop5_vs.i [2023-08-30 02:35:52,302 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 02:35:52,302 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2023-08-30 02:35:52,302 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 02:35:52,373 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 02:35:52,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 69 places, 69 transitions, 148 flow [2023-08-30 02:35:52,459 INFO L130 PetriNetUnfolder]: 7/83 cut-off events. [2023-08-30 02:35:52,459 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 02:35:52,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91 conditions, 83 events. 7/83 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 156 event pairs, 0 based on Foata normal form. 0/65 useless extension candidates. Maximal degree in co-relation 64. Up to 4 conditions per place. [2023-08-30 02:35:52,466 INFO L82 GeneralOperation]: Start removeDead. Operand has 69 places, 69 transitions, 148 flow [2023-08-30 02:35:52,469 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 68 places, 68 transitions, 144 flow [2023-08-30 02:35:52,473 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 02:35:52,483 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 68 places, 68 transitions, 144 flow [2023-08-30 02:35:52,489 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 68 places, 68 transitions, 144 flow [2023-08-30 02:35:52,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 68 places, 68 transitions, 144 flow [2023-08-30 02:35:52,534 INFO L130 PetriNetUnfolder]: 7/83 cut-off events. [2023-08-30 02:35:52,534 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 02:35:52,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91 conditions, 83 events. 7/83 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 156 event pairs, 0 based on Foata normal form. 0/65 useless extension candidates. Maximal degree in co-relation 64. Up to 4 conditions per place. [2023-08-30 02:35:52,538 INFO L119 LiptonReduction]: Number of co-enabled transitions 1290 [2023-08-30 02:35:53,817 INFO L134 LiptonReduction]: Checked pairs total: 2283 [2023-08-30 02:35:53,817 INFO L136 LiptonReduction]: Total number of compositions: 58 [2023-08-30 02:35:53,827 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 02:35:53,832 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;@165da746, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 02:35:53,832 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2023-08-30 02:35:53,833 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2023-08-30 02:35:53,833 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 02:35:53,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:35:53,834 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-30 02:35:53,834 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-30 02:35:53,838 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:35:53,838 INFO L85 PathProgramCache]: Analyzing trace with hash 360, now seen corresponding path program 1 times [2023-08-30 02:35:53,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:35:53,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411938821] [2023-08-30 02:35:53,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:35:53,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:35:53,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:35:53,923 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 02:35:53,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:35:53,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411938821] [2023-08-30 02:35:53,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411938821] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:35:53,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:35:53,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-30 02:35:53,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203365578] [2023-08-30 02:35:53,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:35:53,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-30 02:35:53,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:35:53,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-30 02:35:53,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-30 02:35:53,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 127 [2023-08-30 02:35:53,964 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 27 transitions, 62 flow. Second operand has 2 states, 2 states have (on average 55.5) internal successors, (111), 2 states have internal predecessors, (111), 0 states have call successors, (0), 0 states 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 02:35:53,964 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:35:53,964 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 127 [2023-08-30 02:35:53,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:35:54,014 INFO L130 PetriNetUnfolder]: 195/324 cut-off events. [2023-08-30 02:35:54,015 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 02:35:54,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 657 conditions, 324 events. 195/324 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1225 event pairs, 145 based on Foata normal form. 28/298 useless extension candidates. Maximal degree in co-relation 647. Up to 314 conditions per place. [2023-08-30 02:35:54,018 INFO L137 encePairwiseOnDemand]: 120/127 looper letters, 15 selfloop transitions, 0 changer transitions 0/20 dead transitions. [2023-08-30 02:35:54,018 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 20 transitions, 78 flow [2023-08-30 02:35:54,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-30 02:35:54,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-30 02:35:54,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 132 transitions. [2023-08-30 02:35:54,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5196850393700787 [2023-08-30 02:35:54,027 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 132 transitions. [2023-08-30 02:35:54,028 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 132 transitions. [2023-08-30 02:35:54,028 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:35:54,030 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 132 transitions. [2023-08-30 02:35:54,031 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 66.0) internal successors, (132), 2 states have internal predecessors, (132), 0 states have call successors, (0), 0 states 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 02:35:54,034 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 127.0) internal successors, (381), 3 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:35:54,034 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 127.0) internal successors, (381), 3 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:35:54,036 INFO L175 Difference]: Start difference. First operand has 30 places, 27 transitions, 62 flow. Second operand 2 states and 132 transitions. [2023-08-30 02:35:54,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 20 transitions, 78 flow [2023-08-30 02:35:54,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 20 transitions, 77 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 02:35:54,039 INFO L231 Difference]: Finished difference. Result has 24 places, 20 transitions, 47 flow [2023-08-30 02:35:54,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=47, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=47, PETRI_PLACES=24, PETRI_TRANSITIONS=20} [2023-08-30 02:35:54,043 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -6 predicate places. [2023-08-30 02:35:54,043 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 20 transitions, 47 flow [2023-08-30 02:35:54,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 55.5) internal successors, (111), 2 states have internal predecessors, (111), 0 states have call successors, (0), 0 states 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 02:35:54,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:35:54,044 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 02:35:54,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 02:35:54,044 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-30 02:35:54,045 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:35:54,045 INFO L85 PathProgramCache]: Analyzing trace with hash 10964022, now seen corresponding path program 1 times [2023-08-30 02:35:54,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:35:54,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482934786] [2023-08-30 02:35:54,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:35:54,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:35:54,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:35:54,146 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 02:35:54,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:35:54,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482934786] [2023-08-30 02:35:54,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482934786] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:35:54,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:35:54,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:35:54,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171956456] [2023-08-30 02:35:54,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:35:54,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:35:54,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:35:54,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:35:54,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:35:54,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 127 [2023-08-30 02:35:54,178 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 20 transitions, 47 flow. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 0 states have call successors, (0), 0 states 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 02:35:54,178 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:35:54,178 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 127 [2023-08-30 02:35:54,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:35:54,234 INFO L130 PetriNetUnfolder]: 151/256 cut-off events. [2023-08-30 02:35:54,237 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 02:35:54,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 521 conditions, 256 events. 151/256 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 917 event pairs, 111 based on Foata normal form. 0/226 useless extension candidates. Maximal degree in co-relation 517. Up to 245 conditions per place. [2023-08-30 02:35:54,239 INFO L137 encePairwiseOnDemand]: 125/127 looper letters, 13 selfloop transitions, 1 changer transitions 0/19 dead transitions. [2023-08-30 02:35:54,239 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 19 transitions, 73 flow [2023-08-30 02:35:54,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:35:54,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:35:54,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 156 transitions. [2023-08-30 02:35:54,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4094488188976378 [2023-08-30 02:35:54,244 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 156 transitions. [2023-08-30 02:35:54,244 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 156 transitions. [2023-08-30 02:35:54,246 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:35:54,246 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 156 transitions. [2023-08-30 02:35:54,248 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states 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 02:35:54,249 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:35:54,249 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:35:54,249 INFO L175 Difference]: Start difference. First operand has 24 places, 20 transitions, 47 flow. Second operand 3 states and 156 transitions. [2023-08-30 02:35:54,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 19 transitions, 73 flow [2023-08-30 02:35:54,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 19 transitions, 73 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 02:35:54,251 INFO L231 Difference]: Finished difference. Result has 25 places, 19 transitions, 47 flow [2023-08-30 02:35:54,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=45, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=47, PETRI_PLACES=25, PETRI_TRANSITIONS=19} [2023-08-30 02:35:54,252 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -5 predicate places. [2023-08-30 02:35:54,252 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 19 transitions, 47 flow [2023-08-30 02:35:54,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 0 states have call successors, (0), 0 states 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 02:35:54,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:35:54,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 02:35:54,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 02:35:54,253 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-30 02:35:54,255 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:35:54,255 INFO L85 PathProgramCache]: Analyzing trace with hash 10964023, now seen corresponding path program 1 times [2023-08-30 02:35:54,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:35:54,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680692041] [2023-08-30 02:35:54,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:35:54,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:35:54,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:35:54,347 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 02:35:54,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:35:54,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680692041] [2023-08-30 02:35:54,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680692041] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:35:54,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:35:54,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:35:54,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039897113] [2023-08-30 02:35:54,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:35:54,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:35:54,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:35:54,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:35:54,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:35:54,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 127 [2023-08-30 02:35:54,364 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 19 transitions, 47 flow. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 0 states have call successors, (0), 0 states 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 02:35:54,364 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:35:54,364 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 127 [2023-08-30 02:35:54,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:35:54,385 INFO L130 PetriNetUnfolder]: 107/188 cut-off events. [2023-08-30 02:35:54,385 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 02:35:54,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 387 conditions, 188 events. 107/188 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 617 event pairs, 77 based on Foata normal form. 0/182 useless extension candidates. Maximal degree in co-relation 382. Up to 177 conditions per place. [2023-08-30 02:35:54,387 INFO L137 encePairwiseOnDemand]: 125/127 looper letters, 12 selfloop transitions, 1 changer transitions 0/18 dead transitions. [2023-08-30 02:35:54,389 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 18 transitions, 71 flow [2023-08-30 02:35:54,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:35:54,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:35:54,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 164 transitions. [2023-08-30 02:35:54,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4304461942257218 [2023-08-30 02:35:54,390 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 164 transitions. [2023-08-30 02:35:54,390 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 164 transitions. [2023-08-30 02:35:54,391 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:35:54,391 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 164 transitions. [2023-08-30 02:35:54,391 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 0 states have call successors, (0), 0 states 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 02:35:54,392 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:35:54,393 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:35:54,393 INFO L175 Difference]: Start difference. First operand has 25 places, 19 transitions, 47 flow. Second operand 3 states and 164 transitions. [2023-08-30 02:35:54,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 18 transitions, 71 flow [2023-08-30 02:35:54,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 18 transitions, 70 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 02:35:54,394 INFO L231 Difference]: Finished difference. Result has 25 places, 18 transitions, 46 flow [2023-08-30 02:35:54,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=46, PETRI_PLACES=25, PETRI_TRANSITIONS=18} [2023-08-30 02:35:54,395 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -5 predicate places. [2023-08-30 02:35:54,396 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 18 transitions, 46 flow [2023-08-30 02:35:54,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 0 states have call successors, (0), 0 states 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 02:35:54,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:35:54,399 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 02:35:54,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 02:35:54,400 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-30 02:35:54,400 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:35:54,401 INFO L85 PathProgramCache]: Analyzing trace with hash 339842420, now seen corresponding path program 1 times [2023-08-30 02:35:54,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:35:54,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941952666] [2023-08-30 02:35:54,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:35:54,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:35:54,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:35:54,471 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 02:35:54,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:35:54,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941952666] [2023-08-30 02:35:54,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941952666] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:35:54,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:35:54,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:35:54,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982352036] [2023-08-30 02:35:54,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:35:54,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:35:54,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:35:54,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:35:54,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:35:54,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 127 [2023-08-30 02:35:54,481 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 18 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states 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 02:35:54,481 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:35:54,481 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 127 [2023-08-30 02:35:54,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:35:54,527 INFO L130 PetriNetUnfolder]: 215/358 cut-off events. [2023-08-30 02:35:54,528 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 02:35:54,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 730 conditions, 358 events. 215/358 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1262 event pairs, 66 based on Foata normal form. 0/330 useless extension candidates. Maximal degree in co-relation 725. Up to 202 conditions per place. [2023-08-30 02:35:54,532 INFO L137 encePairwiseOnDemand]: 121/127 looper letters, 20 selfloop transitions, 4 changer transitions 0/27 dead transitions. [2023-08-30 02:35:54,532 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 27 transitions, 112 flow [2023-08-30 02:35:54,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:35:54,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:35:54,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 173 transitions. [2023-08-30 02:35:54,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4540682414698163 [2023-08-30 02:35:54,535 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 173 transitions. [2023-08-30 02:35:54,535 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 173 transitions. [2023-08-30 02:35:54,535 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:35:54,536 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 173 transitions. [2023-08-30 02:35:54,536 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 0 states have call successors, (0), 0 states 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 02:35:54,537 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:35:54,538 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:35:54,538 INFO L175 Difference]: Start difference. First operand has 25 places, 18 transitions, 46 flow. Second operand 3 states and 173 transitions. [2023-08-30 02:35:54,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 27 transitions, 112 flow [2023-08-30 02:35:54,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 27 transitions, 111 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 02:35:54,539 INFO L231 Difference]: Finished difference. Result has 28 places, 21 transitions, 77 flow [2023-08-30 02:35:54,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=45, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=77, PETRI_PLACES=28, PETRI_TRANSITIONS=21} [2023-08-30 02:35:54,540 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -2 predicate places. [2023-08-30 02:35:54,540 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 21 transitions, 77 flow [2023-08-30 02:35:54,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states 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 02:35:54,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:35:54,541 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-30 02:35:54,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 02:35:54,542 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-30 02:35:54,542 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:35:54,542 INFO L85 PathProgramCache]: Analyzing trace with hash -2018082594, now seen corresponding path program 1 times [2023-08-30 02:35:54,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:35:54,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13440299] [2023-08-30 02:35:54,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:35:54,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:35:54,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 02:35:54,568 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 02:35:54,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 02:35:54,600 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 02:35:54,600 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 02:35:54,600 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 9 remaining) [2023-08-30 02:35:54,603 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (7 of 9 remaining) [2023-08-30 02:35:54,604 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 9 remaining) [2023-08-30 02:35:54,604 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 9 remaining) [2023-08-30 02:35:54,604 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 9 remaining) [2023-08-30 02:35:54,604 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 9 remaining) [2023-08-30 02:35:54,605 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (2 of 9 remaining) [2023-08-30 02:35:54,605 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 9 remaining) [2023-08-30 02:35:54,605 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 9 remaining) [2023-08-30 02:35:54,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 02:35:54,606 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-08-30 02:35:54,607 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 02:35:54,607 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-30 02:35:54,625 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 02:35:54,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 95 places, 96 transitions, 216 flow [2023-08-30 02:35:54,646 INFO L130 PetriNetUnfolder]: 10/113 cut-off events. [2023-08-30 02:35:54,646 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 02:35:54,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127 conditions, 113 events. 10/113 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 236 event pairs, 0 based on Foata normal form. 0/88 useless extension candidates. Maximal degree in co-relation 122. Up to 6 conditions per place. [2023-08-30 02:35:54,649 INFO L82 GeneralOperation]: Start removeDead. Operand has 95 places, 96 transitions, 216 flow [2023-08-30 02:35:54,649 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 81 places, 81 transitions, 177 flow [2023-08-30 02:35:54,650 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 02:35:54,650 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 81 places, 81 transitions, 177 flow [2023-08-30 02:35:54,655 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 81 places, 81 transitions, 177 flow [2023-08-30 02:35:54,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 81 places, 81 transitions, 177 flow [2023-08-30 02:35:54,661 INFO L130 PetriNetUnfolder]: 10/113 cut-off events. [2023-08-30 02:35:54,667 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 02:35:54,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126 conditions, 113 events. 10/113 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 234 event pairs, 0 based on Foata normal form. 0/88 useless extension candidates. Maximal degree in co-relation 98. Up to 6 conditions per place. [2023-08-30 02:35:54,668 INFO L119 LiptonReduction]: Number of co-enabled transitions 2372 [2023-08-30 02:35:55,824 INFO L134 LiptonReduction]: Checked pairs total: 6303 [2023-08-30 02:35:55,825 INFO L136 LiptonReduction]: Total number of compositions: 61 [2023-08-30 02:35:55,830 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 02:35:55,831 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;@165da746, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 02:35:55,831 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2023-08-30 02:35:55,833 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2023-08-30 02:35:55,833 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 02:35:55,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:35:55,833 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-30 02:35:55,834 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-30 02:35:55,834 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:35:55,834 INFO L85 PathProgramCache]: Analyzing trace with hash 543, now seen corresponding path program 1 times [2023-08-30 02:35:55,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:35:55,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155007652] [2023-08-30 02:35:55,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:35:55,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:35:55,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:35:55,852 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 02:35:55,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:35:55,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155007652] [2023-08-30 02:35:55,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155007652] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:35:55,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:35:55,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-30 02:35:55,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709085509] [2023-08-30 02:35:55,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:35:55,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-30 02:35:55,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:35:55,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-30 02:35:55,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-30 02:35:55,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 157 [2023-08-30 02:35:55,859 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 38 transitions, 91 flow. Second operand has 2 states, 2 states have (on average 70.5) internal successors, (141), 2 states have internal predecessors, (141), 0 states have call successors, (0), 0 states 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 02:35:55,859 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:35:55,859 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 157 [2023-08-30 02:35:55,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:35:55,937 INFO L130 PetriNetUnfolder]: 443/945 cut-off events. [2023-08-30 02:35:55,937 INFO L131 PetriNetUnfolder]: For 46/46 co-relation queries the response was YES. [2023-08-30 02:35:55,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1661 conditions, 945 events. 443/945 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 5649 event pairs, 285 based on Foata normal form. 0/842 useless extension candidates. Maximal degree in co-relation 1650. Up to 642 conditions per place. [2023-08-30 02:35:55,942 INFO L137 encePairwiseOnDemand]: 149/157 looper letters, 15 selfloop transitions, 0 changer transitions 0/30 dead transitions. [2023-08-30 02:35:55,942 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 30 transitions, 105 flow [2023-08-30 02:35:55,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-30 02:35:55,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-30 02:35:55,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 163 transitions. [2023-08-30 02:35:55,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5191082802547771 [2023-08-30 02:35:55,944 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 163 transitions. [2023-08-30 02:35:55,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 163 transitions. [2023-08-30 02:35:55,944 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:35:55,944 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 163 transitions. [2023-08-30 02:35:55,944 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 81.5) internal successors, (163), 2 states have internal predecessors, (163), 0 states have call successors, (0), 0 states 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 02:35:55,945 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 0 states 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 02:35:55,945 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 0 states 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 02:35:55,946 INFO L175 Difference]: Start difference. First operand has 42 places, 38 transitions, 91 flow. Second operand 2 states and 163 transitions. [2023-08-30 02:35:55,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 30 transitions, 105 flow [2023-08-30 02:35:55,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 30 transitions, 102 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 02:35:55,947 INFO L231 Difference]: Finished difference. Result has 35 places, 30 transitions, 72 flow [2023-08-30 02:35:55,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=72, PETRI_PLACES=35, PETRI_TRANSITIONS=30} [2023-08-30 02:35:55,948 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -7 predicate places. [2023-08-30 02:35:55,948 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 30 transitions, 72 flow [2023-08-30 02:35:55,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 70.5) internal successors, (141), 2 states have internal predecessors, (141), 0 states have call successors, (0), 0 states 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 02:35:55,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:35:55,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 02:35:55,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 02:35:55,948 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-30 02:35:55,949 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:35:55,949 INFO L85 PathProgramCache]: Analyzing trace with hash 16682927, now seen corresponding path program 1 times [2023-08-30 02:35:55,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:35:55,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530131984] [2023-08-30 02:35:55,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:35:55,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:35:55,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:35:55,970 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 02:35:55,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:35:55,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530131984] [2023-08-30 02:35:55,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530131984] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:35:55,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:35:55,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:35:55,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404241751] [2023-08-30 02:35:55,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:35:55,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:35:55,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:35:55,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:35:55,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:35:55,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 157 [2023-08-30 02:35:55,991 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 30 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 3 states have internal predecessors, (190), 0 states have call successors, (0), 0 states 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 02:35:55,991 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:35:55,991 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 157 [2023-08-30 02:35:55,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:35:56,033 INFO L130 PetriNetUnfolder]: 321/707 cut-off events. [2023-08-30 02:35:56,034 INFO L131 PetriNetUnfolder]: For 34/34 co-relation queries the response was YES. [2023-08-30 02:35:56,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1237 conditions, 707 events. 321/707 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3985 event pairs, 204 based on Foata normal form. 0/646 useless extension candidates. Maximal degree in co-relation 1232. Up to 467 conditions per place. [2023-08-30 02:35:56,037 INFO L137 encePairwiseOnDemand]: 155/157 looper letters, 13 selfloop transitions, 1 changer transitions 0/29 dead transitions. [2023-08-30 02:35:56,038 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 29 transitions, 98 flow [2023-08-30 02:35:56,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:35:56,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:35:56,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 201 transitions. [2023-08-30 02:35:56,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4267515923566879 [2023-08-30 02:35:56,039 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 201 transitions. [2023-08-30 02:35:56,039 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 201 transitions. [2023-08-30 02:35:56,039 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:35:56,039 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 201 transitions. [2023-08-30 02:35:56,040 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states 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 02:35:56,041 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states 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 02:35:56,041 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states 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 02:35:56,041 INFO L175 Difference]: Start difference. First operand has 35 places, 30 transitions, 72 flow. Second operand 3 states and 201 transitions. [2023-08-30 02:35:56,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 29 transitions, 98 flow [2023-08-30 02:35:56,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 29 transitions, 98 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 02:35:56,042 INFO L231 Difference]: Finished difference. Result has 36 places, 29 transitions, 72 flow [2023-08-30 02:35:56,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=72, PETRI_PLACES=36, PETRI_TRANSITIONS=29} [2023-08-30 02:35:56,043 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -6 predicate places. [2023-08-30 02:35:56,043 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 29 transitions, 72 flow [2023-08-30 02:35:56,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 3 states have internal predecessors, (190), 0 states have call successors, (0), 0 states 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 02:35:56,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:35:56,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 02:35:56,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 02:35:56,044 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-30 02:35:56,044 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:35:56,044 INFO L85 PathProgramCache]: Analyzing trace with hash 16682925, now seen corresponding path program 1 times [2023-08-30 02:35:56,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:35:56,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663521685] [2023-08-30 02:35:56,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:35:56,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:35:56,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:35:56,083 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 02:35:56,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:35:56,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663521685] [2023-08-30 02:35:56,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663521685] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:35:56,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:35:56,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:35:56,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110717613] [2023-08-30 02:35:56,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:35:56,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:35:56,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:35:56,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:35:56,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:35:56,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 157 [2023-08-30 02:35:56,098 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 29 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 0 states 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 02:35:56,098 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:35:56,098 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 157 [2023-08-30 02:35:56,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:35:56,131 INFO L130 PetriNetUnfolder]: 199/469 cut-off events. [2023-08-30 02:35:56,131 INFO L131 PetriNetUnfolder]: For 34/34 co-relation queries the response was YES. [2023-08-30 02:35:56,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 827 conditions, 469 events. 199/469 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2366 event pairs, 123 based on Foata normal form. 0/450 useless extension candidates. Maximal degree in co-relation 821. Up to 293 conditions per place. [2023-08-30 02:35:56,133 INFO L137 encePairwiseOnDemand]: 155/157 looper letters, 12 selfloop transitions, 1 changer transitions 0/28 dead transitions. [2023-08-30 02:35:56,134 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 28 transitions, 96 flow [2023-08-30 02:35:56,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:35:56,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:35:56,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 209 transitions. [2023-08-30 02:35:56,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4437367303609342 [2023-08-30 02:35:56,135 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 209 transitions. [2023-08-30 02:35:56,135 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 209 transitions. [2023-08-30 02:35:56,135 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:35:56,135 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 209 transitions. [2023-08-30 02:35:56,136 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 69.66666666666667) internal successors, (209), 3 states have internal predecessors, (209), 0 states have call successors, (0), 0 states 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 02:35:56,136 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states 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 02:35:56,137 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states 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 02:35:56,137 INFO L175 Difference]: Start difference. First operand has 36 places, 29 transitions, 72 flow. Second operand 3 states and 209 transitions. [2023-08-30 02:35:56,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 28 transitions, 96 flow [2023-08-30 02:35:56,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 28 transitions, 95 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 02:35:56,138 INFO L231 Difference]: Finished difference. Result has 36 places, 28 transitions, 71 flow [2023-08-30 02:35:56,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=69, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=71, PETRI_PLACES=36, PETRI_TRANSITIONS=28} [2023-08-30 02:35:56,139 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -6 predicate places. [2023-08-30 02:35:56,139 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 28 transitions, 71 flow [2023-08-30 02:35:56,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 0 states 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 02:35:56,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:35:56,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 02:35:56,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 02:35:56,140 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-30 02:35:56,140 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:35:56,140 INFO L85 PathProgramCache]: Analyzing trace with hash 517128133, now seen corresponding path program 1 times [2023-08-30 02:35:56,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:35:56,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835892627] [2023-08-30 02:35:56,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:35:56,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:35:56,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:35:56,159 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 02:35:56,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:35:56,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835892627] [2023-08-30 02:35:56,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835892627] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:35:56,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:35:56,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:35:56,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337777588] [2023-08-30 02:35:56,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:35:56,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:35:56,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:35:56,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:35:56,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:35:56,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-30 02:35:56,170 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 28 transitions, 71 flow. Second operand has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 0 states have call successors, (0), 0 states 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 02:35:56,170 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:35:56,170 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-30 02:35:56,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:35:56,279 INFO L130 PetriNetUnfolder]: 1108/1805 cut-off events. [2023-08-30 02:35:56,279 INFO L131 PetriNetUnfolder]: For 109/109 co-relation queries the response was YES. [2023-08-30 02:35:56,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3527 conditions, 1805 events. 1108/1805 cut-off events. For 109/109 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 9874 event pairs, 273 based on Foata normal form. 0/1744 useless extension candidates. Maximal degree in co-relation 3521. Up to 1041 conditions per place. [2023-08-30 02:35:56,288 INFO L137 encePairwiseOnDemand]: 150/157 looper letters, 25 selfloop transitions, 6 changer transitions 0/41 dead transitions. [2023-08-30 02:35:56,288 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 41 transitions, 164 flow [2023-08-30 02:35:56,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:35:56,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:35:56,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 212 transitions. [2023-08-30 02:35:56,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45010615711252655 [2023-08-30 02:35:56,290 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 212 transitions. [2023-08-30 02:35:56,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 212 transitions. [2023-08-30 02:35:56,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:35:56,290 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 212 transitions. [2023-08-30 02:35:56,291 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 states 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 02:35:56,291 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states 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 02:35:56,291 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states 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 02:35:56,292 INFO L175 Difference]: Start difference. First operand has 36 places, 28 transitions, 71 flow. Second operand 3 states and 212 transitions. [2023-08-30 02:35:56,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 41 transitions, 164 flow [2023-08-30 02:35:56,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 41 transitions, 163 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 02:35:56,293 INFO L231 Difference]: Finished difference. Result has 39 places, 33 transitions, 116 flow [2023-08-30 02:35:56,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=39, PETRI_TRANSITIONS=33} [2023-08-30 02:35:56,293 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -3 predicate places. [2023-08-30 02:35:56,293 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 33 transitions, 116 flow [2023-08-30 02:35:56,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 0 states have call successors, (0), 0 states 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 02:35:56,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:35:56,294 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:35:56,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 02:35:56,294 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-30 02:35:56,294 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:35:56,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1729428049, now seen corresponding path program 1 times [2023-08-30 02:35:56,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:35:56,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457374905] [2023-08-30 02:35:56,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:35:56,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:35:56,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:35:56,329 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 02:35:56,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:35:56,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457374905] [2023-08-30 02:35:56,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457374905] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:35:56,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:35:56,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 02:35:56,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070127193] [2023-08-30 02:35:56,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:35:56,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:35:56,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:35:56,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:35:56,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:35:56,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 157 [2023-08-30 02:35:56,344 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 33 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states 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 02:35:56,344 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:35:56,345 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 157 [2023-08-30 02:35:56,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:35:56,393 INFO L130 PetriNetUnfolder]: 104/334 cut-off events. [2023-08-30 02:35:56,394 INFO L131 PetriNetUnfolder]: For 59/59 co-relation queries the response was YES. [2023-08-30 02:35:56,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 678 conditions, 334 events. 104/334 cut-off events. For 59/59 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1640 event pairs, 15 based on Foata normal form. 101/433 useless extension candidates. Maximal degree in co-relation 671. Up to 121 conditions per place. [2023-08-30 02:35:56,396 INFO L137 encePairwiseOnDemand]: 151/157 looper letters, 11 selfloop transitions, 6 changer transitions 0/35 dead transitions. [2023-08-30 02:35:56,396 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 35 transitions, 154 flow [2023-08-30 02:35:56,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:35:56,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:35:56,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 227 transitions. [2023-08-30 02:35:56,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4819532908704883 [2023-08-30 02:35:56,398 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 227 transitions. [2023-08-30 02:35:56,398 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 227 transitions. [2023-08-30 02:35:56,399 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:35:56,399 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 227 transitions. [2023-08-30 02:35:56,400 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states 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 02:35:56,400 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states 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 02:35:56,401 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states 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 02:35:56,401 INFO L175 Difference]: Start difference. First operand has 39 places, 33 transitions, 116 flow. Second operand 3 states and 227 transitions. [2023-08-30 02:35:56,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 35 transitions, 154 flow [2023-08-30 02:35:56,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 35 transitions, 142 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-30 02:35:56,405 INFO L231 Difference]: Finished difference. Result has 39 places, 31 transitions, 104 flow [2023-08-30 02:35:56,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=39, PETRI_TRANSITIONS=31} [2023-08-30 02:35:56,407 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -3 predicate places. [2023-08-30 02:35:56,407 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 31 transitions, 104 flow [2023-08-30 02:35:56,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states 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 02:35:56,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:35:56,407 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-30 02:35:56,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 02:35:56,408 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-30 02:35:56,408 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:35:56,408 INFO L85 PathProgramCache]: Analyzing trace with hash 221634714, now seen corresponding path program 1 times [2023-08-30 02:35:56,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:35:56,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124708476] [2023-08-30 02:35:56,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:35:56,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:35:56,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 02:35:56,424 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 02:35:56,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 02:35:56,441 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 02:35:56,441 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 02:35:56,441 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 10 remaining) [2023-08-30 02:35:56,441 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (8 of 10 remaining) [2023-08-30 02:35:56,442 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 10 remaining) [2023-08-30 02:35:56,442 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 10 remaining) [2023-08-30 02:35:56,442 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 10 remaining) [2023-08-30 02:35:56,442 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 10 remaining) [2023-08-30 02:35:56,442 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (3 of 10 remaining) [2023-08-30 02:35:56,443 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 10 remaining) [2023-08-30 02:35:56,443 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 10 remaining) [2023-08-30 02:35:56,443 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 10 remaining) [2023-08-30 02:35:56,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-30 02:35:56,443 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2023-08-30 02:35:56,444 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 02:35:56,445 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-30 02:35:56,478 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 02:35:56,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 121 places, 123 transitions, 288 flow [2023-08-30 02:35:56,497 INFO L130 PetriNetUnfolder]: 13/143 cut-off events. [2023-08-30 02:35:56,497 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 02:35:56,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164 conditions, 143 events. 13/143 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 341 event pairs, 0 based on Foata normal form. 0/111 useless extension candidates. Maximal degree in co-relation 157. Up to 8 conditions per place. [2023-08-30 02:35:56,498 INFO L82 GeneralOperation]: Start removeDead. Operand has 121 places, 123 transitions, 288 flow [2023-08-30 02:35:56,499 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 94 places, 94 transitions, 212 flow [2023-08-30 02:35:56,499 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 02:35:56,500 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 94 places, 94 transitions, 212 flow [2023-08-30 02:35:56,500 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 94 places, 94 transitions, 212 flow [2023-08-30 02:35:56,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 94 places, 94 transitions, 212 flow [2023-08-30 02:35:56,511 INFO L130 PetriNetUnfolder]: 13/143 cut-off events. [2023-08-30 02:35:56,511 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 02:35:56,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162 conditions, 143 events. 13/143 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 339 event pairs, 0 based on Foata normal form. 0/111 useless extension candidates. Maximal degree in co-relation 133. Up to 8 conditions per place. [2023-08-30 02:35:56,514 INFO L119 LiptonReduction]: Number of co-enabled transitions 3766 [2023-08-30 02:35:57,635 INFO L134 LiptonReduction]: Checked pairs total: 11393 [2023-08-30 02:35:57,635 INFO L136 LiptonReduction]: Total number of compositions: 68 [2023-08-30 02:35:57,636 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 02:35:57,637 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;@165da746, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 02:35:57,637 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2023-08-30 02:35:57,637 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2023-08-30 02:35:57,637 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 02:35:57,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:35:57,637 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-30 02:35:57,637 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-30 02:35:57,637 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:35:57,638 INFO L85 PathProgramCache]: Analyzing trace with hash 763, now seen corresponding path program 1 times [2023-08-30 02:35:57,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:35:57,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000950584] [2023-08-30 02:35:57,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:35:57,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:35:57,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:35:57,641 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 02:35:57,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:35:57,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000950584] [2023-08-30 02:35:57,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000950584] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:35:57,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:35:57,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-30 02:35:57,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625470322] [2023-08-30 02:35:57,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:35:57,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-30 02:35:57,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:35:57,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-30 02:35:57,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-30 02:35:57,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 191 [2023-08-30 02:35:57,644 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 47 transitions, 118 flow. Second operand has 2 states, 2 states have (on average 85.5) internal successors, (171), 2 states have internal predecessors, (171), 0 states have call successors, (0), 0 states 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 02:35:57,644 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:35:57,644 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 191 [2023-08-30 02:35:57,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:35:57,852 INFO L130 PetriNetUnfolder]: 1883/3489 cut-off events. [2023-08-30 02:35:57,853 INFO L131 PetriNetUnfolder]: For 322/322 co-relation queries the response was YES. [2023-08-30 02:35:57,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6270 conditions, 3489 events. 1883/3489 cut-off events. For 322/322 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 24114 event pairs, 1218 based on Foata normal form. 0/3182 useless extension candidates. Maximal degree in co-relation 6258. Up to 2478 conditions per place. [2023-08-30 02:35:57,870 INFO L137 encePairwiseOnDemand]: 182/191 looper letters, 18 selfloop transitions, 0 changer transitions 0/38 dead transitions. [2023-08-30 02:35:57,870 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 38 transitions, 136 flow [2023-08-30 02:35:57,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-30 02:35:57,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-30 02:35:57,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 197 transitions. [2023-08-30 02:35:57,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5157068062827225 [2023-08-30 02:35:57,871 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 197 transitions. [2023-08-30 02:35:57,871 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 197 transitions. [2023-08-30 02:35:57,872 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:35:57,872 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 197 transitions. [2023-08-30 02:35:57,872 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 98.5) internal successors, (197), 2 states have internal predecessors, (197), 0 states have call successors, (0), 0 states 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 02:35:57,873 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 191.0) internal successors, (573), 3 states have internal predecessors, (573), 0 states have call successors, (0), 0 states 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 02:35:57,873 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 191.0) internal successors, (573), 3 states have internal predecessors, (573), 0 states have call successors, (0), 0 states 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 02:35:57,873 INFO L175 Difference]: Start difference. First operand has 52 places, 47 transitions, 118 flow. Second operand 2 states and 197 transitions. [2023-08-30 02:35:57,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 38 transitions, 136 flow [2023-08-30 02:35:57,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 38 transitions, 129 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-30 02:35:57,876 INFO L231 Difference]: Finished difference. Result has 44 places, 38 transitions, 93 flow [2023-08-30 02:35:57,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=93, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=93, PETRI_PLACES=44, PETRI_TRANSITIONS=38} [2023-08-30 02:35:57,878 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -8 predicate places. [2023-08-30 02:35:57,878 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 38 transitions, 93 flow [2023-08-30 02:35:57,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 85.5) internal successors, (171), 2 states have internal predecessors, (171), 0 states have call successors, (0), 0 states 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 02:35:57,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:35:57,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 02:35:57,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-30 02:35:57,878 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-30 02:35:57,879 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:35:57,879 INFO L85 PathProgramCache]: Analyzing trace with hash 23355339, now seen corresponding path program 1 times [2023-08-30 02:35:57,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:35:57,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285036983] [2023-08-30 02:35:57,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:35:57,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:35:57,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:35:57,898 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 02:35:57,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:35:57,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285036983] [2023-08-30 02:35:57,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285036983] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:35:57,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:35:57,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:35:57,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381076398] [2023-08-30 02:35:57,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:35:57,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:35:57,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:35:57,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:35:57,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:35:57,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 191 [2023-08-30 02:35:57,916 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 38 transitions, 93 flow. Second operand has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states 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 02:35:57,916 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:35:57,916 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 191 [2023-08-30 02:35:57,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:35:58,095 INFO L130 PetriNetUnfolder]: 1365/2603 cut-off events. [2023-08-30 02:35:58,095 INFO L131 PetriNetUnfolder]: For 118/118 co-relation queries the response was YES. [2023-08-30 02:35:58,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4598 conditions, 2603 events. 1365/2603 cut-off events. For 118/118 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 17284 event pairs, 876 based on Foata normal form. 0/2422 useless extension candidates. Maximal degree in co-relation 4592. Up to 1799 conditions per place. [2023-08-30 02:35:58,110 INFO L137 encePairwiseOnDemand]: 189/191 looper letters, 16 selfloop transitions, 1 changer transitions 0/37 dead transitions. [2023-08-30 02:35:58,110 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 37 transitions, 125 flow [2023-08-30 02:35:58,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:35:58,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:35:58,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 249 transitions. [2023-08-30 02:35:58,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43455497382198954 [2023-08-30 02:35:58,112 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 249 transitions. [2023-08-30 02:35:58,112 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 249 transitions. [2023-08-30 02:35:58,112 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:35:58,112 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 249 transitions. [2023-08-30 02:35:58,113 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 83.0) internal successors, (249), 3 states have internal predecessors, (249), 0 states have call successors, (0), 0 states 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 02:35:58,114 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states 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 02:35:58,114 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states 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 02:35:58,114 INFO L175 Difference]: Start difference. First operand has 44 places, 38 transitions, 93 flow. Second operand 3 states and 249 transitions. [2023-08-30 02:35:58,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 37 transitions, 125 flow [2023-08-30 02:35:58,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 37 transitions, 125 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 02:35:58,115 INFO L231 Difference]: Finished difference. Result has 45 places, 37 transitions, 93 flow [2023-08-30 02:35:58,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=93, PETRI_PLACES=45, PETRI_TRANSITIONS=37} [2023-08-30 02:35:58,116 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -7 predicate places. [2023-08-30 02:35:58,116 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 37 transitions, 93 flow [2023-08-30 02:35:58,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states 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 02:35:58,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:35:58,116 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 02:35:58,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-30 02:35:58,116 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-30 02:35:58,117 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:35:58,117 INFO L85 PathProgramCache]: Analyzing trace with hash 23355341, now seen corresponding path program 1 times [2023-08-30 02:35:58,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:35:58,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627932541] [2023-08-30 02:35:58,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:35:58,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:35:58,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:35:58,143 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 02:35:58,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:35:58,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627932541] [2023-08-30 02:35:58,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627932541] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:35:58,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:35:58,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:35:58,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381762794] [2023-08-30 02:35:58,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:35:58,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:35:58,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:35:58,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:35:58,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:35:58,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 191 [2023-08-30 02:35:58,162 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 37 transitions, 93 flow. Second operand has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states 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 02:35:58,162 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:35:58,162 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 191 [2023-08-30 02:35:58,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:35:58,267 INFO L130 PetriNetUnfolder]: 847/1717 cut-off events. [2023-08-30 02:35:58,267 INFO L131 PetriNetUnfolder]: For 118/118 co-relation queries the response was YES. [2023-08-30 02:35:58,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3036 conditions, 1717 events. 847/1717 cut-off events. For 118/118 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10842 event pairs, 534 based on Foata normal form. 0/1662 useless extension candidates. Maximal degree in co-relation 3029. Up to 1121 conditions per place. [2023-08-30 02:35:58,276 INFO L137 encePairwiseOnDemand]: 189/191 looper letters, 15 selfloop transitions, 1 changer transitions 0/36 dead transitions. [2023-08-30 02:35:58,276 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 36 transitions, 123 flow [2023-08-30 02:35:58,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:35:58,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:35:58,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 257 transitions. [2023-08-30 02:35:58,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44851657940663175 [2023-08-30 02:35:58,278 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 257 transitions. [2023-08-30 02:35:58,278 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 257 transitions. [2023-08-30 02:35:58,278 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:35:58,278 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 257 transitions. [2023-08-30 02:35:58,278 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states 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 02:35:58,279 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states 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 02:35:58,279 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states 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 02:35:58,279 INFO L175 Difference]: Start difference. First operand has 45 places, 37 transitions, 93 flow. Second operand 3 states and 257 transitions. [2023-08-30 02:35:58,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 36 transitions, 123 flow [2023-08-30 02:35:58,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 36 transitions, 122 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 02:35:58,280 INFO L231 Difference]: Finished difference. Result has 45 places, 36 transitions, 92 flow [2023-08-30 02:35:58,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=45, PETRI_TRANSITIONS=36} [2023-08-30 02:35:58,281 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -7 predicate places. [2023-08-30 02:35:58,281 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 36 transitions, 92 flow [2023-08-30 02:35:58,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states 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 02:35:58,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:35:58,282 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 02:35:58,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-30 02:35:58,282 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-30 02:35:58,282 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:35:58,282 INFO L85 PathProgramCache]: Analyzing trace with hash 723953785, now seen corresponding path program 1 times [2023-08-30 02:35:58,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:35:58,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504619537] [2023-08-30 02:35:58,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:35:58,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:35:58,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:35:58,307 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 02:35:58,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:35:58,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504619537] [2023-08-30 02:35:58,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504619537] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:35:58,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:35:58,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:35:58,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473646567] [2023-08-30 02:35:58,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:35:58,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:35:58,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:35:58,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:35:58,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:35:58,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 191 [2023-08-30 02:35:58,323 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 36 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states 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 02:35:58,323 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:35:58,323 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 191 [2023-08-30 02:35:58,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:35:58,648 INFO L130 PetriNetUnfolder]: 4385/6259 cut-off events. [2023-08-30 02:35:58,648 INFO L131 PetriNetUnfolder]: For 375/375 co-relation queries the response was YES. [2023-08-30 02:35:58,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12372 conditions, 6259 events. 4385/6259 cut-off events. For 375/375 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 33671 event pairs, 1106 based on Foata normal form. 31/6287 useless extension candidates. Maximal degree in co-relation 12365. Up to 5431 conditions per place. [2023-08-30 02:35:58,679 INFO L137 encePairwiseOnDemand]: 186/191 looper letters, 29 selfloop transitions, 4 changer transitions 0/47 dead transitions. [2023-08-30 02:35:58,680 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 47 transitions, 190 flow [2023-08-30 02:35:58,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:35:58,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:35:58,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 262 transitions. [2023-08-30 02:35:58,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4572425828970332 [2023-08-30 02:35:58,681 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 262 transitions. [2023-08-30 02:35:58,681 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 262 transitions. [2023-08-30 02:35:58,681 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:35:58,681 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 262 transitions. [2023-08-30 02:35:58,682 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 0 states have call successors, (0), 0 states 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 02:35:58,683 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states 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 02:35:58,683 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states 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 02:35:58,683 INFO L175 Difference]: Start difference. First operand has 45 places, 36 transitions, 92 flow. Second operand 3 states and 262 transitions. [2023-08-30 02:35:58,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 47 transitions, 190 flow [2023-08-30 02:35:58,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 47 transitions, 189 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 02:35:58,684 INFO L231 Difference]: Finished difference. Result has 47 places, 39 transitions, 117 flow [2023-08-30 02:35:58,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=117, PETRI_PLACES=47, PETRI_TRANSITIONS=39} [2023-08-30 02:35:58,685 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -5 predicate places. [2023-08-30 02:35:58,685 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 39 transitions, 117 flow [2023-08-30 02:35:58,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states 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 02:35:58,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:35:58,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:35:58,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-30 02:35:58,686 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-30 02:35:58,686 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:35:58,686 INFO L85 PathProgramCache]: Analyzing trace with hash -988996324, now seen corresponding path program 1 times [2023-08-30 02:35:58,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:35:58,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516562636] [2023-08-30 02:35:58,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:35:58,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:35:58,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:35:58,718 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 02:35:58,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:35:58,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516562636] [2023-08-30 02:35:58,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516562636] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:35:58,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:35:58,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 02:35:58,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183963741] [2023-08-30 02:35:58,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:35:58,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:35:58,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:35:58,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:35:58,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:35:58,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 191 [2023-08-30 02:35:58,721 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 39 transitions, 117 flow. Second operand has 3 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 states have internal predecessors, (260), 0 states have call successors, (0), 0 states 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 02:35:58,721 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:35:58,721 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 191 [2023-08-30 02:35:58,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:35:58,775 INFO L130 PetriNetUnfolder]: 240/785 cut-off events. [2023-08-30 02:35:58,775 INFO L131 PetriNetUnfolder]: For 104/104 co-relation queries the response was YES. [2023-08-30 02:35:58,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1459 conditions, 785 events. 240/785 cut-off events. For 104/104 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 4879 event pairs, 49 based on Foata normal form. 326/1107 useless extension candidates. Maximal degree in co-relation 1451. Up to 273 conditions per place. [2023-08-30 02:35:58,779 INFO L137 encePairwiseOnDemand]: 183/191 looper letters, 13 selfloop transitions, 8 changer transitions 0/44 dead transitions. [2023-08-30 02:35:58,779 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 44 transitions, 182 flow [2023-08-30 02:35:58,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:35:58,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:35:58,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 277 transitions. [2023-08-30 02:35:58,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48342059336823734 [2023-08-30 02:35:58,781 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 277 transitions. [2023-08-30 02:35:58,781 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 277 transitions. [2023-08-30 02:35:58,781 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:35:58,781 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 277 transitions. [2023-08-30 02:35:58,782 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 92.33333333333333) internal successors, (277), 3 states have internal predecessors, (277), 0 states have call successors, (0), 0 states 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 02:35:58,782 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states 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 02:35:58,783 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states 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 02:35:58,783 INFO L175 Difference]: Start difference. First operand has 47 places, 39 transitions, 117 flow. Second operand 3 states and 277 transitions. [2023-08-30 02:35:58,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 44 transitions, 182 flow [2023-08-30 02:35:58,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 44 transitions, 178 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 02:35:58,784 INFO L231 Difference]: Finished difference. Result has 48 places, 39 transitions, 129 flow [2023-08-30 02:35:58,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=129, PETRI_PLACES=48, PETRI_TRANSITIONS=39} [2023-08-30 02:35:58,785 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -4 predicate places. [2023-08-30 02:35:58,785 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 39 transitions, 129 flow [2023-08-30 02:35:58,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 states have internal predecessors, (260), 0 states have call successors, (0), 0 states 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 02:35:58,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:35:58,785 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:35:58,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-30 02:35:58,786 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-30 02:35:58,786 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:35:58,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1531649200, now seen corresponding path program 1 times [2023-08-30 02:35:58,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:35:58,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38135177] [2023-08-30 02:35:58,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:35:58,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:35:58,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:35:58,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:35:58,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:35:58,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38135177] [2023-08-30 02:35:58,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38135177] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:35:58,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:35:58,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 02:35:58,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275484581] [2023-08-30 02:35:58,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:35:58,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 02:35:58,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:35:58,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 02:35:58,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 02:35:58,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 191 [2023-08-30 02:35:58,894 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 39 transitions, 129 flow. Second operand has 5 states, 5 states have (on average 72.4) internal successors, (362), 5 states have internal predecessors, (362), 0 states have call successors, (0), 0 states 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 02:35:58,895 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:35:58,895 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 191 [2023-08-30 02:35:58,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:35:59,059 INFO L130 PetriNetUnfolder]: 589/1385 cut-off events. [2023-08-30 02:35:59,059 INFO L131 PetriNetUnfolder]: For 528/528 co-relation queries the response was YES. [2023-08-30 02:35:59,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3472 conditions, 1385 events. 589/1385 cut-off events. For 528/528 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 9583 event pairs, 33 based on Foata normal form. 12/1394 useless extension candidates. Maximal degree in co-relation 3464. Up to 765 conditions per place. [2023-08-30 02:35:59,066 INFO L137 encePairwiseOnDemand]: 180/191 looper letters, 49 selfloop transitions, 13 changer transitions 0/73 dead transitions. [2023-08-30 02:35:59,067 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 73 transitions, 393 flow [2023-08-30 02:35:59,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 02:35:59,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 02:35:59,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 483 transitions. [2023-08-30 02:35:59,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4214659685863874 [2023-08-30 02:35:59,069 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 483 transitions. [2023-08-30 02:35:59,069 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 483 transitions. [2023-08-30 02:35:59,069 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:35:59,069 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 483 transitions. [2023-08-30 02:35:59,070 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 80.5) internal successors, (483), 6 states have internal predecessors, (483), 0 states have call successors, (0), 0 states 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 02:35:59,071 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 191.0) internal successors, (1337), 7 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states 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 02:35:59,072 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 191.0) internal successors, (1337), 7 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states 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 02:35:59,072 INFO L175 Difference]: Start difference. First operand has 48 places, 39 transitions, 129 flow. Second operand 6 states and 483 transitions. [2023-08-30 02:35:59,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 73 transitions, 393 flow [2023-08-30 02:35:59,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 73 transitions, 372 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 02:35:59,074 INFO L231 Difference]: Finished difference. Result has 55 places, 48 transitions, 209 flow [2023-08-30 02:35:59,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=121, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=209, PETRI_PLACES=55, PETRI_TRANSITIONS=48} [2023-08-30 02:35:59,075 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 3 predicate places. [2023-08-30 02:35:59,075 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 48 transitions, 209 flow [2023-08-30 02:35:59,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 72.4) internal successors, (362), 5 states have internal predecessors, (362), 0 states have call successors, (0), 0 states 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 02:35:59,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:35:59,075 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:35:59,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-30 02:35:59,076 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-30 02:35:59,076 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:35:59,076 INFO L85 PathProgramCache]: Analyzing trace with hash -511109426, now seen corresponding path program 1 times [2023-08-30 02:35:59,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:35:59,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210311141] [2023-08-30 02:35:59,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:35:59,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:35:59,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 02:35:59,085 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 02:35:59,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 02:35:59,093 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 02:35:59,093 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 02:35:59,094 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (10 of 11 remaining) [2023-08-30 02:35:59,094 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (9 of 11 remaining) [2023-08-30 02:35:59,094 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 11 remaining) [2023-08-30 02:35:59,094 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 11 remaining) [2023-08-30 02:35:59,094 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 11 remaining) [2023-08-30 02:35:59,094 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 11 remaining) [2023-08-30 02:35:59,095 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (4 of 11 remaining) [2023-08-30 02:35:59,095 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 11 remaining) [2023-08-30 02:35:59,095 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (2 of 11 remaining) [2023-08-30 02:35:59,095 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 11 remaining) [2023-08-30 02:35:59,095 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 11 remaining) [2023-08-30 02:35:59,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-30 02:35:59,095 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:35:59,096 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 02:35:59,096 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-30 02:35:59,129 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 02:35:59,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 147 places, 150 transitions, 364 flow [2023-08-30 02:35:59,146 INFO L130 PetriNetUnfolder]: 16/173 cut-off events. [2023-08-30 02:35:59,146 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-30 02:35:59,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 202 conditions, 173 events. 16/173 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 422 event pairs, 0 based on Foata normal form. 0/134 useless extension candidates. Maximal degree in co-relation 193. Up to 10 conditions per place. [2023-08-30 02:35:59,147 INFO L82 GeneralOperation]: Start removeDead. Operand has 147 places, 150 transitions, 364 flow [2023-08-30 02:35:59,148 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 107 places, 107 transitions, 249 flow [2023-08-30 02:35:59,148 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 02:35:59,148 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 107 places, 107 transitions, 249 flow [2023-08-30 02:35:59,149 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 107 places, 107 transitions, 249 flow [2023-08-30 02:35:59,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 107 places, 107 transitions, 249 flow [2023-08-30 02:35:59,165 INFO L130 PetriNetUnfolder]: 16/173 cut-off events. [2023-08-30 02:35:59,165 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-30 02:35:59,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 199 conditions, 173 events. 16/173 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 422 event pairs, 0 based on Foata normal form. 0/134 useless extension candidates. Maximal degree in co-relation 169. Up to 10 conditions per place. [2023-08-30 02:35:59,170 INFO L119 LiptonReduction]: Number of co-enabled transitions 5472 [2023-08-30 02:36:00,536 INFO L134 LiptonReduction]: Checked pairs total: 19397 [2023-08-30 02:36:00,536 INFO L136 LiptonReduction]: Total number of compositions: 71 [2023-08-30 02:36:00,537 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 02:36:00,537 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;@165da746, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 02:36:00,537 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2023-08-30 02:36:00,537 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-30 02:36:00,538 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 02:36:00,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:36:00,538 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-30 02:36:00,538 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 02:36:00,538 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:36:00,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1011, now seen corresponding path program 1 times [2023-08-30 02:36:00,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:36:00,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800133750] [2023-08-30 02:36:00,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:36:00,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:36:00,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:36:00,541 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 02:36:00,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:36:00,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800133750] [2023-08-30 02:36:00,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800133750] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:36:00,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:36:00,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-30 02:36:00,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716376071] [2023-08-30 02:36:00,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:36:00,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-30 02:36:00,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:36:00,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-30 02:36:00,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-30 02:36:00,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 221 [2023-08-30 02:36:00,543 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 56 transitions, 147 flow. Second operand has 2 states, 2 states have (on average 100.5) internal successors, (201), 2 states have internal predecessors, (201), 0 states have call successors, (0), 0 states 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 02:36:00,543 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:36:00,543 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 221 [2023-08-30 02:36:00,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:36:01,242 INFO L130 PetriNetUnfolder]: 7391/12309 cut-off events. [2023-08-30 02:36:01,242 INFO L131 PetriNetUnfolder]: For 1798/1798 co-relation queries the response was YES. [2023-08-30 02:36:01,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22651 conditions, 12309 events. 7391/12309 cut-off events. For 1798/1798 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 91238 event pairs, 4809 based on Foata normal form. 0/11390 useless extension candidates. Maximal degree in co-relation 22638. Up to 9174 conditions per place. [2023-08-30 02:36:01,295 INFO L137 encePairwiseOnDemand]: 211/221 looper letters, 21 selfloop transitions, 0 changer transitions 0/46 dead transitions. [2023-08-30 02:36:01,295 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 46 transitions, 169 flow [2023-08-30 02:36:01,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-30 02:36:01,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-30 02:36:01,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 231 transitions. [2023-08-30 02:36:01,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5226244343891403 [2023-08-30 02:36:01,297 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 231 transitions. [2023-08-30 02:36:01,297 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 231 transitions. [2023-08-30 02:36:01,297 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:36:01,297 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 231 transitions. [2023-08-30 02:36:01,298 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 115.5) internal successors, (231), 2 states have internal predecessors, (231), 0 states have call successors, (0), 0 states 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 02:36:01,298 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 221.0) internal successors, (663), 3 states have internal predecessors, (663), 0 states have call successors, (0), 0 states 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 02:36:01,299 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 221.0) internal successors, (663), 3 states have internal predecessors, (663), 0 states have call successors, (0), 0 states 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 02:36:01,299 INFO L175 Difference]: Start difference. First operand has 62 places, 56 transitions, 147 flow. Second operand 2 states and 231 transitions. [2023-08-30 02:36:01,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 46 transitions, 169 flow [2023-08-30 02:36:01,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 46 transitions, 156 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-30 02:36:01,301 INFO L231 Difference]: Finished difference. Result has 53 places, 46 transitions, 114 flow [2023-08-30 02:36:01,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=221, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=114, PETRI_PLACES=53, PETRI_TRANSITIONS=46} [2023-08-30 02:36:01,302 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, -9 predicate places. [2023-08-30 02:36:01,302 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 46 transitions, 114 flow [2023-08-30 02:36:01,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 100.5) internal successors, (201), 2 states have internal predecessors, (201), 0 states have call successors, (0), 0 states 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 02:36:01,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:36:01,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 02:36:01,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-30 02:36:01,303 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 02:36:01,303 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:36:01,303 INFO L85 PathProgramCache]: Analyzing trace with hash 30984997, now seen corresponding path program 1 times [2023-08-30 02:36:01,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:36:01,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62238474] [2023-08-30 02:36:01,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:36:01,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:36:01,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:36:01,321 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 02:36:01,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:36:01,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62238474] [2023-08-30 02:36:01,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62238474] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:36:01,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:36:01,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:36:01,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216295799] [2023-08-30 02:36:01,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:36:01,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:36:01,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:36:01,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:36:01,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:36:01,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 221 [2023-08-30 02:36:01,339 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 46 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 0 states have call successors, (0), 0 states 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 02:36:01,339 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:36:01,339 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 221 [2023-08-30 02:36:01,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:36:01,944 INFO L130 PetriNetUnfolder]: 5361/9155 cut-off events. [2023-08-30 02:36:01,945 INFO L131 PetriNetUnfolder]: For 370/370 co-relation queries the response was YES. [2023-08-30 02:36:01,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16407 conditions, 9155 events. 5361/9155 cut-off events. For 370/370 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 66589 event pairs, 3468 based on Foata normal form. 0/8614 useless extension candidates. Maximal degree in co-relation 16400. Up to 6659 conditions per place. [2023-08-30 02:36:01,997 INFO L137 encePairwiseOnDemand]: 219/221 looper letters, 19 selfloop transitions, 1 changer transitions 0/45 dead transitions. [2023-08-30 02:36:01,997 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 45 transitions, 152 flow [2023-08-30 02:36:01,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:36:01,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:36:01,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 297 transitions. [2023-08-30 02:36:01,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4479638009049774 [2023-08-30 02:36:01,999 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 297 transitions. [2023-08-30 02:36:01,999 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 297 transitions. [2023-08-30 02:36:01,999 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:36:01,999 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 297 transitions. [2023-08-30 02:36:02,000 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 0 states have call successors, (0), 0 states 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 02:36:02,001 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 221.0) internal successors, (884), 4 states have internal predecessors, (884), 0 states have call successors, (0), 0 states 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 02:36:02,001 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 221.0) internal successors, (884), 4 states have internal predecessors, (884), 0 states have call successors, (0), 0 states 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 02:36:02,001 INFO L175 Difference]: Start difference. First operand has 53 places, 46 transitions, 114 flow. Second operand 3 states and 297 transitions. [2023-08-30 02:36:02,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 45 transitions, 152 flow [2023-08-30 02:36:02,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 45 transitions, 152 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 02:36:02,003 INFO L231 Difference]: Finished difference. Result has 54 places, 45 transitions, 114 flow [2023-08-30 02:36:02,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=221, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=54, PETRI_TRANSITIONS=45} [2023-08-30 02:36:02,003 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, -8 predicate places. [2023-08-30 02:36:02,003 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 45 transitions, 114 flow [2023-08-30 02:36:02,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 0 states have call successors, (0), 0 states 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 02:36:02,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:36:02,004 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 02:36:02,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-30 02:36:02,004 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 02:36:02,004 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:36:02,004 INFO L85 PathProgramCache]: Analyzing trace with hash 30984998, now seen corresponding path program 1 times [2023-08-30 02:36:02,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:36:02,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236197585] [2023-08-30 02:36:02,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:36:02,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:36:02,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:36:02,026 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 02:36:02,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:36:02,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236197585] [2023-08-30 02:36:02,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236197585] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:36:02,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:36:02,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:36:02,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267420815] [2023-08-30 02:36:02,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:36:02,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:36:02,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:36:02,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:36:02,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:36:02,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 221 [2023-08-30 02:36:02,042 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 45 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 0 states 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 02:36:02,042 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:36:02,042 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 221 [2023-08-30 02:36:02,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:36:02,351 INFO L130 PetriNetUnfolder]: 3331/6001 cut-off events. [2023-08-30 02:36:02,352 INFO L131 PetriNetUnfolder]: For 370/370 co-relation queries the response was YES. [2023-08-30 02:36:02,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10741 conditions, 6001 events. 3331/6001 cut-off events. For 370/370 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 42689 event pairs, 2127 based on Foata normal form. 0/5838 useless extension candidates. Maximal degree in co-relation 10733. Up to 4145 conditions per place. [2023-08-30 02:36:02,387 INFO L137 encePairwiseOnDemand]: 219/221 looper letters, 18 selfloop transitions, 1 changer transitions 0/44 dead transitions. [2023-08-30 02:36:02,387 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 44 transitions, 150 flow [2023-08-30 02:36:02,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:36:02,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:36:02,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 305 transitions. [2023-08-30 02:36:02,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46003016591251883 [2023-08-30 02:36:02,389 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 305 transitions. [2023-08-30 02:36:02,389 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 305 transitions. [2023-08-30 02:36:02,390 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:36:02,390 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 305 transitions. [2023-08-30 02:36:02,390 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 0 states have call successors, (0), 0 states 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 02:36:02,391 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 221.0) internal successors, (884), 4 states have internal predecessors, (884), 0 states have call successors, (0), 0 states 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 02:36:02,391 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 221.0) internal successors, (884), 4 states have internal predecessors, (884), 0 states have call successors, (0), 0 states 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 02:36:02,392 INFO L175 Difference]: Start difference. First operand has 54 places, 45 transitions, 114 flow. Second operand 3 states and 305 transitions. [2023-08-30 02:36:02,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 44 transitions, 150 flow [2023-08-30 02:36:02,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 44 transitions, 149 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 02:36:02,392 INFO L231 Difference]: Finished difference. Result has 54 places, 44 transitions, 113 flow [2023-08-30 02:36:02,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=221, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=113, PETRI_PLACES=54, PETRI_TRANSITIONS=44} [2023-08-30 02:36:02,393 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, -8 predicate places. [2023-08-30 02:36:02,393 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 44 transitions, 113 flow [2023-08-30 02:36:02,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 0 states 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 02:36:02,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:36:02,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 02:36:02,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-30 02:36:02,394 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 02:36:02,394 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:36:02,394 INFO L85 PathProgramCache]: Analyzing trace with hash 960467867, now seen corresponding path program 1 times [2023-08-30 02:36:02,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:36:02,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356202313] [2023-08-30 02:36:02,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:36:02,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:36:02,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:36:02,423 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 02:36:02,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:36:02,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356202313] [2023-08-30 02:36:02,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356202313] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:36:02,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:36:02,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:36:02,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347389543] [2023-08-30 02:36:02,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:36:02,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:36:02,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:36:02,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:36:02,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:36:02,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 221 [2023-08-30 02:36:02,445 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 44 transitions, 113 flow. Second operand has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 0 states 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 02:36:02,445 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:36:02,446 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 221 [2023-08-30 02:36:02,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:36:06,166 INFO L130 PetriNetUnfolder]: 52255/69822 cut-off events. [2023-08-30 02:36:06,166 INFO L131 PetriNetUnfolder]: For 3523/3523 co-relation queries the response was YES. [2023-08-30 02:36:06,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138243 conditions, 69822 events. 52255/69822 cut-off events. For 3523/3523 co-relation queries the response was YES. Maximal size of possible extension queue 2252. Compared 437718 event pairs, 15212 based on Foata normal form. 0/68265 useless extension candidates. Maximal degree in co-relation 138235. Up to 46663 conditions per place. [2023-08-30 02:36:06,649 INFO L137 encePairwiseOnDemand]: 210/221 looper letters, 41 selfloop transitions, 10 changer transitions 0/67 dead transitions. [2023-08-30 02:36:06,650 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 67 transitions, 276 flow [2023-08-30 02:36:06,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:36:06,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:36:06,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 298 transitions. [2023-08-30 02:36:06,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494720965309201 [2023-08-30 02:36:06,651 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 298 transitions. [2023-08-30 02:36:06,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 298 transitions. [2023-08-30 02:36:06,652 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:36:06,652 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 298 transitions. [2023-08-30 02:36:06,652 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 99.33333333333333) internal successors, (298), 3 states have internal predecessors, (298), 0 states have call successors, (0), 0 states 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 02:36:06,653 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 221.0) internal successors, (884), 4 states have internal predecessors, (884), 0 states have call successors, (0), 0 states 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 02:36:06,653 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 221.0) internal successors, (884), 4 states have internal predecessors, (884), 0 states have call successors, (0), 0 states 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 02:36:06,653 INFO L175 Difference]: Start difference. First operand has 54 places, 44 transitions, 113 flow. Second operand 3 states and 298 transitions. [2023-08-30 02:36:06,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 67 transitions, 276 flow [2023-08-30 02:36:06,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 67 transitions, 275 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 02:36:06,657 INFO L231 Difference]: Finished difference. Result has 57 places, 53 transitions, 190 flow [2023-08-30 02:36:06,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=221, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=190, PETRI_PLACES=57, PETRI_TRANSITIONS=53} [2023-08-30 02:36:06,657 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, -5 predicate places. [2023-08-30 02:36:06,658 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 53 transitions, 190 flow [2023-08-30 02:36:06,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 0 states 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 02:36:06,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:36:06,658 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:36:06,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-30 02:36:06,658 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 02:36:06,659 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:36:06,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1255956424, now seen corresponding path program 1 times [2023-08-30 02:36:06,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:36:06,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597051420] [2023-08-30 02:36:06,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:36:06,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:36:06,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:36:06,685 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 02:36:06,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:36:06,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597051420] [2023-08-30 02:36:06,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597051420] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:36:06,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:36:06,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 02:36:06,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251929432] [2023-08-30 02:36:06,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:36:06,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:36:06,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:36:06,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:36:06,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:36:06,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 221 [2023-08-30 02:36:06,688 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 53 transitions, 190 flow. Second operand has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 0 states have call successors, (0), 0 states 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 02:36:06,688 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:36:06,688 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 221 [2023-08-30 02:36:06,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:36:06,821 INFO L130 PetriNetUnfolder]: 794/2336 cut-off events. [2023-08-30 02:36:06,821 INFO L131 PetriNetUnfolder]: For 504/504 co-relation queries the response was YES. [2023-08-30 02:36:06,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4699 conditions, 2336 events. 794/2336 cut-off events. For 504/504 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 17840 event pairs, 99 based on Foata normal form. 1373/3702 useless extension candidates. Maximal degree in co-relation 4690. Up to 881 conditions per place. [2023-08-30 02:36:06,833 INFO L137 encePairwiseOnDemand]: 211/221 looper letters, 15 selfloop transitions, 10 changer transitions 0/55 dead transitions. [2023-08-30 02:36:06,834 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 55 transitions, 246 flow [2023-08-30 02:36:06,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:36:06,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:36:06,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 327 transitions. [2023-08-30 02:36:06,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49321266968325794 [2023-08-30 02:36:06,835 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 327 transitions. [2023-08-30 02:36:06,836 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 327 transitions. [2023-08-30 02:36:06,836 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:36:06,836 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 327 transitions. [2023-08-30 02:36:06,837 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 109.0) internal successors, (327), 3 states have internal predecessors, (327), 0 states have call successors, (0), 0 states 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 02:36:06,838 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 221.0) internal successors, (884), 4 states have internal predecessors, (884), 0 states have call successors, (0), 0 states 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 02:36:06,838 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 221.0) internal successors, (884), 4 states have internal predecessors, (884), 0 states have call successors, (0), 0 states 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 02:36:06,838 INFO L175 Difference]: Start difference. First operand has 57 places, 53 transitions, 190 flow. Second operand 3 states and 327 transitions. [2023-08-30 02:36:06,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 55 transitions, 246 flow [2023-08-30 02:36:06,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 55 transitions, 226 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-08-30 02:36:06,843 INFO L231 Difference]: Finished difference. Result has 57 places, 49 transitions, 166 flow [2023-08-30 02:36:06,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=221, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=166, PETRI_PLACES=57, PETRI_TRANSITIONS=49} [2023-08-30 02:36:06,844 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, -5 predicate places. [2023-08-30 02:36:06,844 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 49 transitions, 166 flow [2023-08-30 02:36:06,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 0 states have call successors, (0), 0 states 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 02:36:06,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:36:06,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:36:06,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-30 02:36:06,845 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 02:36:06,845 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:36:06,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1037589550, now seen corresponding path program 1 times [2023-08-30 02:36:06,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:36:06,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771654063] [2023-08-30 02:36:06,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:36:06,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:36:06,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:36:06,915 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 02:36:06,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:36:06,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771654063] [2023-08-30 02:36:06,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771654063] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:36:06,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:36:06,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 02:36:06,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462990433] [2023-08-30 02:36:06,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:36:06,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 02:36:06,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:36:06,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 02:36:06,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 02:36:07,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 221 [2023-08-30 02:36:07,004 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 49 transitions, 166 flow. Second operand has 5 states, 5 states have (on average 79.4) internal successors, (397), 5 states have internal predecessors, (397), 0 states have call successors, (0), 0 states 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 02:36:07,004 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:36:07,004 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 221 [2023-08-30 02:36:07,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:36:07,308 INFO L130 PetriNetUnfolder]: 1997/4326 cut-off events. [2023-08-30 02:36:07,308 INFO L131 PetriNetUnfolder]: For 1659/1659 co-relation queries the response was YES. [2023-08-30 02:36:07,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11234 conditions, 4326 events. 1997/4326 cut-off events. For 1659/1659 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 35172 event pairs, 65 based on Foata normal form. 0/4271 useless extension candidates. Maximal degree in co-relation 11225. Up to 2808 conditions per place. [2023-08-30 02:36:07,332 INFO L137 encePairwiseOnDemand]: 207/221 looper letters, 71 selfloop transitions, 21 changer transitions 0/104 dead transitions. [2023-08-30 02:36:07,333 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 104 transitions, 582 flow [2023-08-30 02:36:07,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 02:36:07,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 02:36:07,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 545 transitions. [2023-08-30 02:36:07,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4110105580693816 [2023-08-30 02:36:07,335 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 545 transitions. [2023-08-30 02:36:07,335 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 545 transitions. [2023-08-30 02:36:07,335 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:36:07,335 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 545 transitions. [2023-08-30 02:36:07,337 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 90.83333333333333) internal successors, (545), 6 states have internal predecessors, (545), 0 states have call successors, (0), 0 states 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 02:36:07,338 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 221.0) internal successors, (1547), 7 states have internal predecessors, (1547), 0 states have call successors, (0), 0 states 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 02:36:07,356 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 221.0) internal successors, (1547), 7 states have internal predecessors, (1547), 0 states have call successors, (0), 0 states 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 02:36:07,357 INFO L175 Difference]: Start difference. First operand has 57 places, 49 transitions, 166 flow. Second operand 6 states and 545 transitions. [2023-08-30 02:36:07,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 104 transitions, 582 flow [2023-08-30 02:36:07,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 104 transitions, 556 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 02:36:07,362 INFO L231 Difference]: Finished difference. Result has 64 places, 69 transitions, 324 flow [2023-08-30 02:36:07,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=221, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=324, PETRI_PLACES=64, PETRI_TRANSITIONS=69} [2023-08-30 02:36:07,363 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 2 predicate places. [2023-08-30 02:36:07,363 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 69 transitions, 324 flow [2023-08-30 02:36:07,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 79.4) internal successors, (397), 5 states have internal predecessors, (397), 0 states have call successors, (0), 0 states 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 02:36:07,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:36:07,363 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:36:07,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-08-30 02:36:07,364 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 02:36:07,364 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:36:07,364 INFO L85 PathProgramCache]: Analyzing trace with hash 352795019, now seen corresponding path program 2 times [2023-08-30 02:36:07,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:36:07,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085422437] [2023-08-30 02:36:07,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:36:07,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:36:07,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:36:07,487 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:36:07,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:36:07,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085422437] [2023-08-30 02:36:07,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085422437] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 02:36:07,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190890601] [2023-08-30 02:36:07,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 02:36:07,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 02:36:07,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 02:36:07,506 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 02:36:07,517 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 02:36:07,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 02:36:07,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 02:36:07,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 02:36:07,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:36:07,895 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:36:07,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 02:36:07,996 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:36:07,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190890601] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 02:36:07,997 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 02:36:07,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2023-08-30 02:36:07,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612018386] [2023-08-30 02:36:07,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 02:36:07,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 02:36:07,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:36:07,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 02:36:07,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2023-08-30 02:36:08,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 221 [2023-08-30 02:36:08,250 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 69 transitions, 324 flow. Second operand has 20 states, 20 states have (on average 78.85) internal successors, (1577), 20 states have internal predecessors, (1577), 0 states have call successors, (0), 0 states 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 02:36:08,250 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:36:08,250 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 221 [2023-08-30 02:36:08,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:36:09,237 INFO L130 PetriNetUnfolder]: 3472/6945 cut-off events. [2023-08-30 02:36:09,238 INFO L131 PetriNetUnfolder]: For 3051/3051 co-relation queries the response was YES. [2023-08-30 02:36:09,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19035 conditions, 6945 events. 3472/6945 cut-off events. For 3051/3051 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 59743 event pairs, 51 based on Foata normal form. 40/6982 useless extension candidates. Maximal degree in co-relation 19022. Up to 3249 conditions per place. [2023-08-30 02:36:09,284 INFO L137 encePairwiseOnDemand]: 203/221 looper letters, 104 selfloop transitions, 45 changer transitions 0/159 dead transitions. [2023-08-30 02:36:09,284 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 159 transitions, 1011 flow [2023-08-30 02:36:09,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 02:36:09,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 02:36:09,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 974 transitions. [2023-08-30 02:36:09,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4006581653640477 [2023-08-30 02:36:09,287 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 974 transitions. [2023-08-30 02:36:09,287 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 974 transitions. [2023-08-30 02:36:09,288 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:36:09,288 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 974 transitions. [2023-08-30 02:36:09,289 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 88.54545454545455) internal successors, (974), 11 states have internal predecessors, (974), 0 states have call successors, (0), 0 states 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 02:36:09,292 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 221.0) internal successors, (2652), 12 states have internal predecessors, (2652), 0 states have call successors, (0), 0 states 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 02:36:09,292 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 221.0) internal successors, (2652), 12 states have internal predecessors, (2652), 0 states have call successors, (0), 0 states 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 02:36:09,292 INFO L175 Difference]: Start difference. First operand has 64 places, 69 transitions, 324 flow. Second operand 11 states and 974 transitions. [2023-08-30 02:36:09,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 159 transitions, 1011 flow [2023-08-30 02:36:09,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 159 transitions, 1011 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 02:36:09,302 INFO L231 Difference]: Finished difference. Result has 79 places, 93 transitions, 605 flow [2023-08-30 02:36:09,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=221, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=605, PETRI_PLACES=79, PETRI_TRANSITIONS=93} [2023-08-30 02:36:09,303 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 17 predicate places. [2023-08-30 02:36:09,303 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 93 transitions, 605 flow [2023-08-30 02:36:09,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 78.85) internal successors, (1577), 20 states have internal predecessors, (1577), 0 states have call successors, (0), 0 states 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 02:36:09,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:36:09,304 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:36:09,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 02:36:09,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-08-30 02:36:09,509 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 02:36:09,510 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:36:09,510 INFO L85 PathProgramCache]: Analyzing trace with hash -2032843764, now seen corresponding path program 1 times [2023-08-30 02:36:09,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:36:09,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721349501] [2023-08-30 02:36:09,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:36:09,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:36:09,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 02:36:09,526 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 02:36:09,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 02:36:09,544 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 02:36:09,544 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 02:36:09,544 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (11 of 12 remaining) [2023-08-30 02:36:09,545 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (10 of 12 remaining) [2023-08-30 02:36:09,545 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 12 remaining) [2023-08-30 02:36:09,545 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 12 remaining) [2023-08-30 02:36:09,545 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 12 remaining) [2023-08-30 02:36:09,545 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 12 remaining) [2023-08-30 02:36:09,546 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (5 of 12 remaining) [2023-08-30 02:36:09,546 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 12 remaining) [2023-08-30 02:36:09,546 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (3 of 12 remaining) [2023-08-30 02:36:09,546 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (2 of 12 remaining) [2023-08-30 02:36:09,546 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 12 remaining) [2023-08-30 02:36:09,546 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 12 remaining) [2023-08-30 02:36:09,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-08-30 02:36:09,547 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1] [2023-08-30 02:36:09,547 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 02:36:09,547 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-30 02:36:09,575 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 02:36:09,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 173 places, 177 transitions, 444 flow [2023-08-30 02:36:09,588 INFO L130 PetriNetUnfolder]: 19/203 cut-off events. [2023-08-30 02:36:09,589 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-30 02:36:09,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 241 conditions, 203 events. 19/203 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 508 event pairs, 0 based on Foata normal form. 0/157 useless extension candidates. Maximal degree in co-relation 230. Up to 12 conditions per place. [2023-08-30 02:36:09,590 INFO L82 GeneralOperation]: Start removeDead. Operand has 173 places, 177 transitions, 444 flow [2023-08-30 02:36:09,591 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 120 places, 120 transitions, 288 flow [2023-08-30 02:36:09,591 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 02:36:09,591 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 120 places, 120 transitions, 288 flow [2023-08-30 02:36:09,592 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 120 places, 120 transitions, 288 flow [2023-08-30 02:36:09,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 120 places, 120 transitions, 288 flow [2023-08-30 02:36:09,604 INFO L130 PetriNetUnfolder]: 19/203 cut-off events. [2023-08-30 02:36:09,604 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-30 02:36:09,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 237 conditions, 203 events. 19/203 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 508 event pairs, 0 based on Foata normal form. 0/157 useless extension candidates. Maximal degree in co-relation 206. Up to 12 conditions per place. [2023-08-30 02:36:09,610 INFO L119 LiptonReduction]: Number of co-enabled transitions 7490 [2023-08-30 02:36:10,767 INFO L134 LiptonReduction]: Checked pairs total: 25924 [2023-08-30 02:36:10,767 INFO L136 LiptonReduction]: Total number of compositions: 79 [2023-08-30 02:36:10,768 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 02:36:10,768 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;@165da746, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 02:36:10,768 INFO L358 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2023-08-30 02:36:10,769 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2023-08-30 02:36:10,769 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 02:36:10,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:36:10,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-30 02:36:10,769 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-08-30 02:36:10,769 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:36:10,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1293, now seen corresponding path program 1 times [2023-08-30 02:36:10,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:36:10,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920984755] [2023-08-30 02:36:10,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:36:10,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:36:10,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:36:10,774 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 02:36:10,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:36:10,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920984755] [2023-08-30 02:36:10,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920984755] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:36:10,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:36:10,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-30 02:36:10,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917070705] [2023-08-30 02:36:10,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:36:10,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-30 02:36:10,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:36:10,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-30 02:36:10,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-30 02:36:10,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 256 [2023-08-30 02:36:10,776 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 66 transitions, 180 flow. Second operand has 2 states, 2 states have (on average 115.5) internal successors, (231), 2 states have internal predecessors, (231), 0 states have call successors, (0), 0 states 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 02:36:10,776 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:36:10,776 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 256 [2023-08-30 02:36:10,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:36:13,683 INFO L130 PetriNetUnfolder]: 27479/42334 cut-off events. [2023-08-30 02:36:13,684 INFO L131 PetriNetUnfolder]: For 8710/8710 co-relation queries the response was YES. [2023-08-30 02:36:13,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79461 conditions, 42334 events. 27479/42334 cut-off events. For 8710/8710 co-relation queries the response was YES. Maximal size of possible extension queue 1676. Compared 329756 event pairs, 17958 based on Foata normal form. 1335/40911 useless extension candidates. Maximal degree in co-relation 79447. Up to 32826 conditions per place. [2023-08-30 02:36:13,976 INFO L137 encePairwiseOnDemand]: 245/256 looper letters, 24 selfloop transitions, 0 changer transitions 0/55 dead transitions. [2023-08-30 02:36:13,976 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 55 transitions, 206 flow [2023-08-30 02:36:13,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-30 02:36:13,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-30 02:36:13,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 265 transitions. [2023-08-30 02:36:13,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.517578125 [2023-08-30 02:36:13,978 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 265 transitions. [2023-08-30 02:36:13,978 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 265 transitions. [2023-08-30 02:36:13,978 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:36:13,979 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 265 transitions. [2023-08-30 02:36:13,979 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 132.5) internal successors, (265), 2 states have internal predecessors, (265), 0 states have call successors, (0), 0 states 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 02:36:13,980 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 256.0) internal successors, (768), 3 states have internal predecessors, (768), 0 states have call successors, (0), 0 states 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 02:36:13,980 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 256.0) internal successors, (768), 3 states have internal predecessors, (768), 0 states have call successors, (0), 0 states 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 02:36:13,980 INFO L175 Difference]: Start difference. First operand has 73 places, 66 transitions, 180 flow. Second operand 2 states and 265 transitions. [2023-08-30 02:36:13,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 55 transitions, 206 flow [2023-08-30 02:36:13,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 55 transitions, 185 flow, removed 10 selfloop flow, removed 1 redundant places. [2023-08-30 02:36:13,992 INFO L231 Difference]: Finished difference. Result has 63 places, 55 transitions, 137 flow [2023-08-30 02:36:13,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=137, PETRI_PLACES=63, PETRI_TRANSITIONS=55} [2023-08-30 02:36:13,994 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, -10 predicate places. [2023-08-30 02:36:13,994 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 55 transitions, 137 flow [2023-08-30 02:36:13,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 115.5) internal successors, (231), 2 states have internal predecessors, (231), 0 states have call successors, (0), 0 states 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 02:36:13,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:36:13,994 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 02:36:13,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-08-30 02:36:13,995 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-08-30 02:36:13,995 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:36:13,995 INFO L85 PathProgramCache]: Analyzing trace with hash 39657217, now seen corresponding path program 1 times [2023-08-30 02:36:13,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:36:13,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084943080] [2023-08-30 02:36:13,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:36:13,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:36:14,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:36:14,034 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 02:36:14,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:36:14,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084943080] [2023-08-30 02:36:14,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084943080] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:36:14,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:36:14,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:36:14,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204951084] [2023-08-30 02:36:14,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:36:14,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:36:14,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:36:14,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:36:14,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:36:14,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 256 [2023-08-30 02:36:14,054 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 55 transitions, 137 flow. Second operand has 3 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 states have internal predecessors, (334), 0 states have call successors, (0), 0 states 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 02:36:14,054 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:36:14,054 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 256 [2023-08-30 02:36:14,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:36:15,841 INFO L130 PetriNetUnfolder]: 19941/31404 cut-off events. [2023-08-30 02:36:15,841 INFO L131 PetriNetUnfolder]: For 1126/1126 co-relation queries the response was YES. [2023-08-30 02:36:15,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57017 conditions, 31404 events. 19941/31404 cut-off events. For 1126/1126 co-relation queries the response was YES. Maximal size of possible extension queue 1260. Compared 241876 event pairs, 12972 based on Foata normal form. 0/29780 useless extension candidates. Maximal degree in co-relation 57009. Up to 23831 conditions per place. [2023-08-30 02:36:16,144 INFO L137 encePairwiseOnDemand]: 254/256 looper letters, 22 selfloop transitions, 1 changer transitions 0/54 dead transitions. [2023-08-30 02:36:16,144 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 54 transitions, 181 flow [2023-08-30 02:36:16,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:36:16,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:36:16,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 354 transitions. [2023-08-30 02:36:16,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4609375 [2023-08-30 02:36:16,146 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 354 transitions. [2023-08-30 02:36:16,146 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 354 transitions. [2023-08-30 02:36:16,146 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:36:16,146 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 354 transitions. [2023-08-30 02:36:16,147 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 118.0) internal successors, (354), 3 states have internal predecessors, (354), 0 states have call successors, (0), 0 states 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 02:36:16,148 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 256.0) internal successors, (1024), 4 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states 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 02:36:16,148 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 256.0) internal successors, (1024), 4 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states 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 02:36:16,148 INFO L175 Difference]: Start difference. First operand has 63 places, 55 transitions, 137 flow. Second operand 3 states and 354 transitions. [2023-08-30 02:36:16,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 54 transitions, 181 flow [2023-08-30 02:36:16,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 54 transitions, 181 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 02:36:16,150 INFO L231 Difference]: Finished difference. Result has 64 places, 54 transitions, 137 flow [2023-08-30 02:36:16,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=137, PETRI_PLACES=64, PETRI_TRANSITIONS=54} [2023-08-30 02:36:16,151 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, -9 predicate places. [2023-08-30 02:36:16,151 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 54 transitions, 137 flow [2023-08-30 02:36:16,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 states have internal predecessors, (334), 0 states have call successors, (0), 0 states 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 02:36:16,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:36:16,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 02:36:16,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-08-30 02:36:16,152 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-08-30 02:36:16,152 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:36:16,152 INFO L85 PathProgramCache]: Analyzing trace with hash 39657216, now seen corresponding path program 1 times [2023-08-30 02:36:16,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:36:16,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123428898] [2023-08-30 02:36:16,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:36:16,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:36:16,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:36:16,168 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 02:36:16,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:36:16,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123428898] [2023-08-30 02:36:16,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123428898] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:36:16,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:36:16,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:36:16,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753992591] [2023-08-30 02:36:16,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:36:16,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:36:16,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:36:16,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:36:16,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:36:16,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 256 [2023-08-30 02:36:16,186 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 54 transitions, 137 flow. Second operand has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 0 states have call successors, (0), 0 states 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 02:36:16,186 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:36:16,186 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 256 [2023-08-30 02:36:16,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:36:17,441 INFO L130 PetriNetUnfolder]: 12403/20474 cut-off events. [2023-08-30 02:36:17,441 INFO L131 PetriNetUnfolder]: For 1126/1126 co-relation queries the response was YES. [2023-08-30 02:36:17,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37095 conditions, 20474 events. 12403/20474 cut-off events. For 1126/1126 co-relation queries the response was YES. Maximal size of possible extension queue 844. Compared 157772 event pairs, 7986 based on Foata normal form. 0/19984 useless extension candidates. Maximal degree in co-relation 37086. Up to 14837 conditions per place. [2023-08-30 02:36:17,687 INFO L137 encePairwiseOnDemand]: 254/256 looper letters, 21 selfloop transitions, 1 changer transitions 0/53 dead transitions. [2023-08-30 02:36:17,688 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 53 transitions, 179 flow [2023-08-30 02:36:17,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:36:17,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:36:17,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 344 transitions. [2023-08-30 02:36:17,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4479166666666667 [2023-08-30 02:36:17,695 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 344 transitions. [2023-08-30 02:36:17,695 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 344 transitions. [2023-08-30 02:36:17,695 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:36:17,695 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 344 transitions. [2023-08-30 02:36:17,696 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 0 states 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 02:36:17,697 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 256.0) internal successors, (1024), 4 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states 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 02:36:17,698 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 256.0) internal successors, (1024), 4 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states 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 02:36:17,698 INFO L175 Difference]: Start difference. First operand has 64 places, 54 transitions, 137 flow. Second operand 3 states and 344 transitions. [2023-08-30 02:36:17,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 53 transitions, 179 flow [2023-08-30 02:36:17,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 53 transitions, 178 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 02:36:17,699 INFO L231 Difference]: Finished difference. Result has 64 places, 53 transitions, 136 flow [2023-08-30 02:36:17,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=64, PETRI_TRANSITIONS=53} [2023-08-30 02:36:17,700 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, -9 predicate places. [2023-08-30 02:36:17,700 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 53 transitions, 136 flow [2023-08-30 02:36:17,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 0 states have call successors, (0), 0 states 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 02:36:17,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:36:17,701 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 02:36:17,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-08-30 02:36:17,701 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-08-30 02:36:17,701 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:36:17,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1229279719, now seen corresponding path program 1 times [2023-08-30 02:36:17,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:36:17,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050888149] [2023-08-30 02:36:17,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:36:17,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:36:17,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:36:17,717 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 02:36:17,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:36:17,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050888149] [2023-08-30 02:36:17,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050888149] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:36:17,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:36:17,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:36:17,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607842592] [2023-08-30 02:36:17,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:36:17,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:36:17,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:36:17,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:36:17,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:36:17,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 256 [2023-08-30 02:36:17,742 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 53 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 0 states have call successors, (0), 0 states 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 02:36:17,742 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:36:17,742 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 256 [2023-08-30 02:36:17,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:36:47,540 INFO L130 PetriNetUnfolder]: 363069/460780 cut-off events. [2023-08-30 02:36:47,542 INFO L131 PetriNetUnfolder]: For 20118/20118 co-relation queries the response was YES. [2023-08-30 02:36:49,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 914864 conditions, 460780 events. 363069/460780 cut-off events. For 20118/20118 co-relation queries the response was YES. Maximal size of possible extension queue 11642. Compared 2990495 event pairs, 121197 based on Foata normal form. 0/445173 useless extension candidates. Maximal degree in co-relation 914855. Up to 330811 conditions per place. [2023-08-30 02:36:51,649 INFO L137 encePairwiseOnDemand]: 242/256 looper letters, 50 selfloop transitions, 12 changer transitions 0/81 dead transitions. [2023-08-30 02:36:51,649 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 81 transitions, 336 flow [2023-08-30 02:36:51,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:36:51,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:36:51,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 343 transitions. [2023-08-30 02:36:51,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4466145833333333 [2023-08-30 02:36:51,651 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 343 transitions. [2023-08-30 02:36:51,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 343 transitions. [2023-08-30 02:36:51,651 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:36:51,651 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 343 transitions. [2023-08-30 02:36:51,652 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 114.33333333333333) internal successors, (343), 3 states have internal predecessors, (343), 0 states have call successors, (0), 0 states 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 02:36:51,653 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 256.0) internal successors, (1024), 4 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states 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 02:36:51,653 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 256.0) internal successors, (1024), 4 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states 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 02:36:51,653 INFO L175 Difference]: Start difference. First operand has 64 places, 53 transitions, 136 flow. Second operand 3 states and 343 transitions. [2023-08-30 02:36:51,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 81 transitions, 336 flow [2023-08-30 02:36:51,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 81 transitions, 335 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 02:36:51,675 INFO L231 Difference]: Finished difference. Result has 67 places, 64 transitions, 231 flow [2023-08-30 02:36:51,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=231, PETRI_PLACES=67, PETRI_TRANSITIONS=64} [2023-08-30 02:36:51,675 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, -6 predicate places. [2023-08-30 02:36:51,676 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 64 transitions, 231 flow [2023-08-30 02:36:51,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 0 states have call successors, (0), 0 states 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 02:36:51,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:36:51,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:36:51,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-08-30 02:36:51,676 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-08-30 02:36:51,677 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:36:51,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1737902314, now seen corresponding path program 1 times [2023-08-30 02:36:51,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:36:51,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751045937] [2023-08-30 02:36:51,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:36:51,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:36:51,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:36:51,698 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 02:36:51,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:36:51,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751045937] [2023-08-30 02:36:51,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751045937] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:36:51,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:36:51,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 02:36:51,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89366198] [2023-08-30 02:36:51,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:36:51,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:36:51,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:36:51,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:36:51,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:36:51,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 256 [2023-08-30 02:36:51,701 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 64 transitions, 231 flow. Second operand has 3 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 0 states 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 02:36:51,701 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:36:51,701 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 256 [2023-08-30 02:36:51,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:36:51,985 INFO L130 PetriNetUnfolder]: 1961/5687 cut-off events. [2023-08-30 02:36:51,985 INFO L131 PetriNetUnfolder]: For 1222/1222 co-relation queries the response was YES. [2023-08-30 02:36:51,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11406 conditions, 5687 events. 1961/5687 cut-off events. For 1222/1222 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 50914 event pairs, 251 based on Foata normal form. 4093/9736 useless extension candidates. Maximal degree in co-relation 11396. Up to 2143 conditions per place. [2023-08-30 02:36:52,011 INFO L137 encePairwiseOnDemand]: 244/256 looper letters, 17 selfloop transitions, 12 changer transitions 0/66 dead transitions. [2023-08-30 02:36:52,011 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 66 transitions, 296 flow [2023-08-30 02:36:52,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:36:52,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:36:52,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 377 transitions. [2023-08-30 02:36:52,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4908854166666667 [2023-08-30 02:36:52,013 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 377 transitions. [2023-08-30 02:36:52,013 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 377 transitions. [2023-08-30 02:36:52,013 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:36:52,013 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 377 transitions. [2023-08-30 02:36:52,014 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 125.66666666666667) internal successors, (377), 3 states have internal predecessors, (377), 0 states have call successors, (0), 0 states 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 02:36:52,015 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 256.0) internal successors, (1024), 4 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states 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 02:36:52,015 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 256.0) internal successors, (1024), 4 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states 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 02:36:52,015 INFO L175 Difference]: Start difference. First operand has 67 places, 64 transitions, 231 flow. Second operand 3 states and 377 transitions. [2023-08-30 02:36:52,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 66 transitions, 296 flow [2023-08-30 02:36:52,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 66 transitions, 272 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-08-30 02:36:52,025 INFO L231 Difference]: Finished difference. Result has 67 places, 59 transitions, 201 flow [2023-08-30 02:36:52,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=177, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=201, PETRI_PLACES=67, PETRI_TRANSITIONS=59} [2023-08-30 02:36:52,025 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, -6 predicate places. [2023-08-30 02:36:52,025 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 59 transitions, 201 flow [2023-08-30 02:36:52,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 0 states 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 02:36:52,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:36:52,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:36:52,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-08-30 02:36:52,026 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-08-30 02:36:52,026 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:36:52,026 INFO L85 PathProgramCache]: Analyzing trace with hash -2044006220, now seen corresponding path program 1 times [2023-08-30 02:36:52,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:36:52,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816761143] [2023-08-30 02:36:52,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:36:52,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:36:52,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:36:52,065 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 02:36:52,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:36:52,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816761143] [2023-08-30 02:36:52,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816761143] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:36:52,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:36:52,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 02:36:52,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105007779] [2023-08-30 02:36:52,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:36:52,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 02:36:52,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:36:52,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 02:36:52,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 02:36:52,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 256 [2023-08-30 02:36:52,109 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 59 transitions, 201 flow. Second operand has 5 states, 5 states have (on average 89.4) internal successors, (447), 5 states have internal predecessors, (447), 0 states have call successors, (0), 0 states 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 02:36:52,109 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:36:52,109 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 256 [2023-08-30 02:36:52,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:36:52,840 INFO L130 PetriNetUnfolder]: 4767/10054 cut-off events. [2023-08-30 02:36:52,841 INFO L131 PetriNetUnfolder]: For 3898/3898 co-relation queries the response was YES. [2023-08-30 02:36:52,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26308 conditions, 10054 events. 4767/10054 cut-off events. For 3898/3898 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 90577 event pairs, 117 based on Foata normal form. 0/9822 useless extension candidates. Maximal degree in co-relation 26298. Up to 7289 conditions per place. [2023-08-30 02:36:52,880 INFO L137 encePairwiseOnDemand]: 238/256 looper letters, 86 selfloop transitions, 26 changer transitions 0/126 dead transitions. [2023-08-30 02:36:52,880 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 126 transitions, 713 flow [2023-08-30 02:36:52,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 02:36:52,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 02:36:52,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 624 transitions. [2023-08-30 02:36:52,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40625 [2023-08-30 02:36:52,882 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 624 transitions. [2023-08-30 02:36:52,882 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 624 transitions. [2023-08-30 02:36:52,883 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:36:52,883 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 624 transitions. [2023-08-30 02:36:52,884 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 104.0) internal successors, (624), 6 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:36:52,885 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 256.0) internal successors, (1792), 7 states have internal predecessors, (1792), 0 states have call successors, (0), 0 states 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 02:36:52,886 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 256.0) internal successors, (1792), 7 states have internal predecessors, (1792), 0 states have call successors, (0), 0 states 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 02:36:52,886 INFO L175 Difference]: Start difference. First operand has 67 places, 59 transitions, 201 flow. Second operand 6 states and 624 transitions. [2023-08-30 02:36:52,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 126 transitions, 713 flow [2023-08-30 02:36:52,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 126 transitions, 682 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 02:36:52,892 INFO L231 Difference]: Finished difference. Result has 74 places, 84 transitions, 400 flow [2023-08-30 02:36:52,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=400, PETRI_PLACES=74, PETRI_TRANSITIONS=84} [2023-08-30 02:36:52,892 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 1 predicate places. [2023-08-30 02:36:52,893 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 84 transitions, 400 flow [2023-08-30 02:36:52,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 89.4) internal successors, (447), 5 states have internal predecessors, (447), 0 states have call successors, (0), 0 states 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 02:36:52,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:36:52,893 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:36:52,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2023-08-30 02:36:52,893 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-08-30 02:36:52,893 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:36:52,894 INFO L85 PathProgramCache]: Analyzing trace with hash -275954635, now seen corresponding path program 2 times [2023-08-30 02:36:52,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:36:52,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180446023] [2023-08-30 02:36:52,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:36:52,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:36:52,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:36:52,962 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:36:52,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:36:52,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180446023] [2023-08-30 02:36:52,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180446023] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 02:36:52,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076701502] [2023-08-30 02:36:52,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 02:36:52,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 02:36:52,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 02:36:52,964 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 02:36:52,966 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 02:36:53,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 02:36:53,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 02:36:53,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 02:36:53,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:36:53,159 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:36:53,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 02:36:53,242 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:36:53,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076701502] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 02:36:53,243 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 02:36:53,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2023-08-30 02:36:53,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594420764] [2023-08-30 02:36:53,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 02:36:53,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 02:36:53,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:36:53,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 02:36:53,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2023-08-30 02:36:53,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 256 [2023-08-30 02:36:53,645 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 84 transitions, 400 flow. Second operand has 20 states, 20 states have (on average 88.85) internal successors, (1777), 20 states have internal predecessors, (1777), 0 states have call successors, (0), 0 states 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 02:36:53,645 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:36:53,645 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 256 [2023-08-30 02:36:53,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:36:55,163 INFO L130 PetriNetUnfolder]: 7981/15563 cut-off events. [2023-08-30 02:36:55,163 INFO L131 PetriNetUnfolder]: For 7088/7088 co-relation queries the response was YES. [2023-08-30 02:36:55,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43084 conditions, 15563 events. 7981/15563 cut-off events. For 7088/7088 co-relation queries the response was YES. Maximal size of possible extension queue 817. Compared 146144 event pairs, 77 based on Foata normal form. 70/15515 useless extension candidates. Maximal degree in co-relation 43070. Up to 8556 conditions per place. [2023-08-30 02:36:55,254 INFO L137 encePairwiseOnDemand]: 233/256 looper letters, 128 selfloop transitions, 56 changer transitions 0/195 dead transitions. [2023-08-30 02:36:55,254 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 195 transitions, 1261 flow [2023-08-30 02:36:55,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 02:36:55,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 02:36:55,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1117 transitions. [2023-08-30 02:36:55,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3966619318181818 [2023-08-30 02:36:55,257 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1117 transitions. [2023-08-30 02:36:55,257 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1117 transitions. [2023-08-30 02:36:55,258 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:36:55,258 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1117 transitions. [2023-08-30 02:36:55,261 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 101.54545454545455) internal successors, (1117), 11 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states 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 02:36:55,263 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 256.0) internal successors, (3072), 12 states have internal predecessors, (3072), 0 states have call successors, (0), 0 states 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 02:36:55,264 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 256.0) internal successors, (3072), 12 states have internal predecessors, (3072), 0 states have call successors, (0), 0 states 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 02:36:55,264 INFO L175 Difference]: Start difference. First operand has 74 places, 84 transitions, 400 flow. Second operand 11 states and 1117 transitions. [2023-08-30 02:36:55,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 195 transitions, 1261 flow [2023-08-30 02:36:55,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 195 transitions, 1261 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 02:36:55,282 INFO L231 Difference]: Finished difference. Result has 89 places, 114 transitions, 752 flow [2023-08-30 02:36:55,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=400, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=752, PETRI_PLACES=89, PETRI_TRANSITIONS=114} [2023-08-30 02:36:55,284 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 16 predicate places. [2023-08-30 02:36:55,284 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 114 transitions, 752 flow [2023-08-30 02:36:55,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 88.85) internal successors, (1777), 20 states have internal predecessors, (1777), 0 states have call successors, (0), 0 states 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 02:36:55,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:36:55,285 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:36:55,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 02:36:55,489 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,SelfDestructingSolverStorable32 [2023-08-30 02:36:55,489 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-08-30 02:36:55,489 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:36:55,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1682475489, now seen corresponding path program 1 times [2023-08-30 02:36:55,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:36:55,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493992545] [2023-08-30 02:36:55,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:36:55,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:36:55,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 02:36:55,504 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 02:36:55,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 02:36:55,516 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 02:36:55,516 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 02:36:55,516 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 13 remaining) [2023-08-30 02:36:55,516 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (11 of 13 remaining) [2023-08-30 02:36:55,516 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 13 remaining) [2023-08-30 02:36:55,517 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 13 remaining) [2023-08-30 02:36:55,517 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 13 remaining) [2023-08-30 02:36:55,517 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 13 remaining) [2023-08-30 02:36:55,517 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (6 of 13 remaining) [2023-08-30 02:36:55,517 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 13 remaining) [2023-08-30 02:36:55,517 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (4 of 13 remaining) [2023-08-30 02:36:55,517 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (3 of 13 remaining) [2023-08-30 02:36:55,517 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (2 of 13 remaining) [2023-08-30 02:36:55,518 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 13 remaining) [2023-08-30 02:36:55,518 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 13 remaining) [2023-08-30 02:36:55,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-08-30 02:36:55,518 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1] [2023-08-30 02:36:55,519 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 02:36:55,519 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-08-30 02:36:55,542 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 02:36:55,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 199 places, 204 transitions, 528 flow [2023-08-30 02:36:55,554 INFO L130 PetriNetUnfolder]: 22/233 cut-off events. [2023-08-30 02:36:55,554 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-30 02:36:55,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 281 conditions, 233 events. 22/233 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 578 event pairs, 0 based on Foata normal form. 0/180 useless extension candidates. Maximal degree in co-relation 268. Up to 14 conditions per place. [2023-08-30 02:36:55,555 INFO L82 GeneralOperation]: Start removeDead. Operand has 199 places, 204 transitions, 528 flow [2023-08-30 02:36:55,556 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 133 places, 133 transitions, 329 flow [2023-08-30 02:36:55,556 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 02:36:55,557 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 133 places, 133 transitions, 329 flow [2023-08-30 02:36:55,557 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 133 places, 133 transitions, 329 flow [2023-08-30 02:36:55,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 133 places, 133 transitions, 329 flow [2023-08-30 02:36:55,568 INFO L130 PetriNetUnfolder]: 22/233 cut-off events. [2023-08-30 02:36:55,568 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-30 02:36:55,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 276 conditions, 233 events. 22/233 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 576 event pairs, 0 based on Foata normal form. 0/180 useless extension candidates. Maximal degree in co-relation 244. Up to 14 conditions per place. [2023-08-30 02:36:55,574 INFO L119 LiptonReduction]: Number of co-enabled transitions 9820 [2023-08-30 02:36:56,706 INFO L134 LiptonReduction]: Checked pairs total: 33889 [2023-08-30 02:36:56,706 INFO L136 LiptonReduction]: Total number of compositions: 83 [2023-08-30 02:36:56,707 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 02:36:56,707 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;@165da746, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 02:36:56,707 INFO L358 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2023-08-30 02:36:56,708 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2023-08-30 02:36:56,708 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 02:36:56,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:36:56,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-30 02:36:56,708 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-08-30 02:36:56,708 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:36:56,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1606, now seen corresponding path program 1 times [2023-08-30 02:36:56,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:36:56,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305056908] [2023-08-30 02:36:56,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:36:56,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:36:56,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:36:56,712 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 02:36:56,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:36:56,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305056908] [2023-08-30 02:36:56,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305056908] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:36:56,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:36:56,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-30 02:36:56,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177027691] [2023-08-30 02:36:56,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:36:56,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-30 02:36:56,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:36:56,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-30 02:36:56,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-30 02:36:56,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 287 [2023-08-30 02:36:56,714 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 75 transitions, 213 flow. Second operand has 2 states, 2 states have (on average 130.5) internal successors, (261), 2 states have internal predecessors, (261), 0 states have call successors, (0), 0 states 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 02:36:56,714 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:36:56,714 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 287 [2023-08-30 02:36:56,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:37:06,713 INFO L130 PetriNetUnfolder]: 98432/143100 cut-off events. [2023-08-30 02:37:06,713 INFO L131 PetriNetUnfolder]: For 38516/38516 co-relation queries the response was YES. [2023-08-30 02:37:07,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 272888 conditions, 143100 events. 98432/143100 cut-off events. For 38516/38516 co-relation queries the response was YES. Maximal size of possible extension queue 4865. Compared 1147883 event pairs, 64530 based on Foata normal form. 0/134840 useless extension candidates. Maximal degree in co-relation 272873. Up to 114470 conditions per place. [2023-08-30 02:37:08,120 INFO L137 encePairwiseOnDemand]: 275/287 looper letters, 27 selfloop transitions, 0 changer transitions 0/62 dead transitions. [2023-08-30 02:37:08,120 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 62 transitions, 241 flow [2023-08-30 02:37:08,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-30 02:37:08,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-30 02:37:08,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 299 transitions. [2023-08-30 02:37:08,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5209059233449478 [2023-08-30 02:37:08,122 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 299 transitions. [2023-08-30 02:37:08,122 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 299 transitions. [2023-08-30 02:37:08,136 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:37:08,137 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 299 transitions. [2023-08-30 02:37:08,137 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 149.5) internal successors, (299), 2 states have internal predecessors, (299), 0 states have call successors, (0), 0 states 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 02:37:08,138 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 287.0) internal successors, (861), 3 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:37:08,138 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 287.0) internal successors, (861), 3 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:37:08,138 INFO L175 Difference]: Start difference. First operand has 83 places, 75 transitions, 213 flow. Second operand 2 states and 299 transitions. [2023-08-30 02:37:08,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 62 transitions, 241 flow [2023-08-30 02:37:08,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 62 transitions, 210 flow, removed 15 selfloop flow, removed 1 redundant places. [2023-08-30 02:37:08,159 INFO L231 Difference]: Finished difference. Result has 71 places, 62 transitions, 156 flow [2023-08-30 02:37:08,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=156, PETRI_PLACES=71, PETRI_TRANSITIONS=62} [2023-08-30 02:37:08,159 INFO L281 CegarLoopForPetriNet]: 83 programPoint places, -12 predicate places. [2023-08-30 02:37:08,159 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 62 transitions, 156 flow [2023-08-30 02:37:08,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 130.5) internal successors, (261), 2 states have internal predecessors, (261), 0 states have call successors, (0), 0 states 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 02:37:08,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:37:08,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 02:37:08,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2023-08-30 02:37:08,160 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-08-30 02:37:08,160 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:37:08,160 INFO L85 PathProgramCache]: Analyzing trace with hash 49377302, now seen corresponding path program 1 times [2023-08-30 02:37:08,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:37:08,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596427400] [2023-08-30 02:37:08,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:37:08,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:37:08,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:37:08,173 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 02:37:08,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:37:08,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596427400] [2023-08-30 02:37:08,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596427400] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:37:08,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:37:08,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:37:08,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630008383] [2023-08-30 02:37:08,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:37:08,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:37:08,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:37:08,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:37:08,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:37:08,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 287 [2023-08-30 02:37:08,190 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 62 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 123.33333333333333) internal successors, (370), 3 states have internal predecessors, (370), 0 states have call successors, (0), 0 states 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 02:37:08,190 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:37:08,190 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 287 [2023-08-30 02:37:08,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:37:15,907 INFO L130 PetriNetUnfolder]: 71455/105927 cut-off events. [2023-08-30 02:37:15,908 INFO L131 PetriNetUnfolder]: For 3392/3392 co-relation queries the response was YES. [2023-08-30 02:37:16,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 194394 conditions, 105927 events. 71455/105927 cut-off events. For 3392/3392 co-relation queries the response was YES. Maximal size of possible extension queue 3634. Compared 848475 event pairs, 46666 based on Foata normal form. 0/101068 useless extension candidates. Maximal degree in co-relation 194385. Up to 83120 conditions per place. [2023-08-30 02:37:16,982 INFO L137 encePairwiseOnDemand]: 285/287 looper letters, 25 selfloop transitions, 1 changer transitions 0/61 dead transitions. [2023-08-30 02:37:16,982 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 61 transitions, 206 flow [2023-08-30 02:37:16,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:37:16,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:37:16,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 393 transitions. [2023-08-30 02:37:16,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4564459930313589 [2023-08-30 02:37:16,983 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 393 transitions. [2023-08-30 02:37:16,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 393 transitions. [2023-08-30 02:37:16,984 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:37:16,984 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 393 transitions. [2023-08-30 02:37:16,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 131.0) internal successors, (393), 3 states have internal predecessors, (393), 0 states have call successors, (0), 0 states 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 02:37:16,985 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 287.0) internal successors, (1148), 4 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states 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 02:37:16,985 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 287.0) internal successors, (1148), 4 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states 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 02:37:16,985 INFO L175 Difference]: Start difference. First operand has 71 places, 62 transitions, 156 flow. Second operand 3 states and 393 transitions. [2023-08-30 02:37:16,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 61 transitions, 206 flow [2023-08-30 02:37:16,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 61 transitions, 206 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 02:37:16,987 INFO L231 Difference]: Finished difference. Result has 72 places, 61 transitions, 156 flow [2023-08-30 02:37:16,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=72, PETRI_TRANSITIONS=61} [2023-08-30 02:37:16,988 INFO L281 CegarLoopForPetriNet]: 83 programPoint places, -11 predicate places. [2023-08-30 02:37:16,988 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 61 transitions, 156 flow [2023-08-30 02:37:16,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 123.33333333333333) internal successors, (370), 3 states have internal predecessors, (370), 0 states have call successors, (0), 0 states 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 02:37:16,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:37:16,988 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 02:37:16,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2023-08-30 02:37:16,989 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-08-30 02:37:16,989 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:37:16,989 INFO L85 PathProgramCache]: Analyzing trace with hash 49377303, now seen corresponding path program 1 times [2023-08-30 02:37:16,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:37:16,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209252404] [2023-08-30 02:37:16,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:37:16,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:37:16,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:37:17,010 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 02:37:17,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:37:17,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209252404] [2023-08-30 02:37:17,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209252404] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:37:17,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:37:17,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:37:17,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846010176] [2023-08-30 02:37:17,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:37:17,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:37:17,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:37:17,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:37:17,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:37:17,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 287 [2023-08-30 02:37:17,025 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 61 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 126.33333333333333) internal successors, (379), 3 states have internal predecessors, (379), 0 states have call successors, (0), 0 states 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 02:37:17,025 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:37:17,025 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 287 [2023-08-30 02:37:17,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:37:22,025 INFO L130 PetriNetUnfolder]: 44478/68754 cut-off events. [2023-08-30 02:37:22,026 INFO L131 PetriNetUnfolder]: For 3392/3392 co-relation queries the response was YES. [2023-08-30 02:37:22,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125874 conditions, 68754 events. 44478/68754 cut-off events. For 3392/3392 co-relation queries the response was YES. Maximal size of possible extension queue 2408. Compared 558098 event pairs, 28802 based on Foata normal form. 0/67296 useless extension candidates. Maximal degree in co-relation 125864. Up to 51771 conditions per place. [2023-08-30 02:37:22,649 INFO L137 encePairwiseOnDemand]: 285/287 looper letters, 24 selfloop transitions, 1 changer transitions 0/60 dead transitions. [2023-08-30 02:37:22,649 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 60 transitions, 204 flow [2023-08-30 02:37:22,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:37:22,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:37:22,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 401 transitions. [2023-08-30 02:37:22,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4657375145180023 [2023-08-30 02:37:22,651 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 401 transitions. [2023-08-30 02:37:22,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 401 transitions. [2023-08-30 02:37:22,651 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:37:22,651 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 401 transitions. [2023-08-30 02:37:22,652 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 133.66666666666666) internal successors, (401), 3 states have internal predecessors, (401), 0 states have call successors, (0), 0 states 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 02:37:22,652 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 287.0) internal successors, (1148), 4 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states 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 02:37:22,653 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 287.0) internal successors, (1148), 4 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states 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 02:37:22,653 INFO L175 Difference]: Start difference. First operand has 72 places, 61 transitions, 156 flow. Second operand 3 states and 401 transitions. [2023-08-30 02:37:22,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 60 transitions, 204 flow [2023-08-30 02:37:22,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 60 transitions, 203 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 02:37:22,655 INFO L231 Difference]: Finished difference. Result has 72 places, 60 transitions, 155 flow [2023-08-30 02:37:22,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=155, PETRI_PLACES=72, PETRI_TRANSITIONS=60} [2023-08-30 02:37:22,655 INFO L281 CegarLoopForPetriNet]: 83 programPoint places, -11 predicate places. [2023-08-30 02:37:22,656 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 60 transitions, 155 flow [2023-08-30 02:37:22,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 126.33333333333333) internal successors, (379), 3 states have internal predecessors, (379), 0 states have call successors, (0), 0 states 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 02:37:22,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:37:22,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 02:37:22,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2023-08-30 02:37:22,656 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-08-30 02:37:22,656 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:37:22,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1530581616, now seen corresponding path program 1 times [2023-08-30 02:37:22,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:37:22,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21964817] [2023-08-30 02:37:22,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:37:22,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:37:22,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:37:22,669 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 02:37:22,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:37:22,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21964817] [2023-08-30 02:37:22,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21964817] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:37:22,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:37:22,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:37:22,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221199505] [2023-08-30 02:37:22,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:37:22,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:37:22,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:37:22,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:37:22,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:37:22,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 287 [2023-08-30 02:37:22,697 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 60 transitions, 155 flow. Second operand has 3 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 0 states have call successors, (0), 0 states 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 02:37:22,697 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:37:22,697 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 287 [2023-08-30 02:37:22,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand