./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/pthread/stack_longer-1.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/pthread/stack_longer-1.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 4351dece6a672e511bbcb86915e62fc8a7361763ad7ab88f2e640b2d00ea50a7 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 19:42:24,761 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 19:42:24,763 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 19:42:24,785 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 19:42:24,786 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 19:42:24,787 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 19:42:24,788 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 19:42:24,790 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 19:42:24,791 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 19:42:24,792 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 19:42:24,793 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 19:42:24,794 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 19:42:24,794 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 19:42:24,795 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 19:42:24,796 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 19:42:24,797 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 19:42:24,798 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 19:42:24,799 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 19:42:24,800 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 19:42:24,802 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 19:42:24,803 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 19:42:24,804 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 19:42:24,805 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 19:42:24,806 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 19:42:24,809 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 19:42:24,809 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 19:42:24,810 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 19:42:24,810 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 19:42:24,811 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 19:42:24,812 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 19:42:24,812 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 19:42:24,813 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 19:42:24,813 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 19:42:24,814 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 19:42:24,815 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 19:42:24,815 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 19:42:24,816 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 19:42:24,816 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 19:42:24,817 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 19:42:24,817 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 19:42:24,818 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 19:42:24,819 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-29 19:42:24,849 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 19:42:24,850 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 19:42:24,851 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 19:42:24,851 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 19:42:24,852 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 19:42:24,852 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 19:42:24,853 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 19:42:24,854 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 19:42:24,854 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 19:42:24,854 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 19:42:24,855 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 19:42:24,855 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 19:42:24,855 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 19:42:24,855 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 19:42:24,855 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 19:42:24,856 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 19:42:24,856 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 19:42:24,856 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 19:42:24,856 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 19:42:24,856 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 19:42:24,857 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 19:42:24,857 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 19:42:24,857 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 19:42:24,857 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 19:42:24,857 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 19:42:24,858 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 19:42:24,858 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 19:42:24,858 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 19:42:24,858 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-29 19:42:24,858 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-29 19:42:24,858 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 19:42:24,859 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 19:42:24,859 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 19:42:24,859 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 19:42:24,859 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4351dece6a672e511bbcb86915e62fc8a7361763ad7ab88f2e640b2d00ea50a7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 19:42:25,147 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 19:42:25,169 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 19:42:25,172 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 19:42:25,173 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 19:42:25,173 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 19:42:25,178 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/stack_longer-1.i [2023-08-29 19:42:26,290 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 19:42:26,531 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 19:42:26,531 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longer-1.i [2023-08-29 19:42:26,547 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a16449e4/49a5174298e54e419077394a81d318b4/FLAG96a02a82d [2023-08-29 19:42:26,559 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a16449e4/49a5174298e54e419077394a81d318b4 [2023-08-29 19:42:26,561 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 19:42:26,562 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 19:42:26,563 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 19:42:26,563 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 19:42:26,566 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 19:42:26,567 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 07:42:26" (1/1) ... [2023-08-29 19:42:26,568 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bf448fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:42:26, skipping insertion in model container [2023-08-29 19:42:26,568 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 07:42:26" (1/1) ... [2023-08-29 19:42:26,573 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 19:42:26,608 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 19:42:26,981 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/stack_longer-1.i[41527,41540] [2023-08-29 19:42:27,003 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 19:42:27,013 INFO L203 MainTranslator]: Completed pre-run [2023-08-29 19:42:27,062 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/stack_longer-1.i[41527,41540] [2023-08-29 19:42:27,074 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 19:42:27,130 INFO L208 MainTranslator]: Completed translation [2023-08-29 19:42:27,131 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:42:27 WrapperNode [2023-08-29 19:42:27,131 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 19:42:27,132 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-29 19:42:27,132 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-29 19:42:27,133 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-29 19:42:27,138 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:42:27" (1/1) ... [2023-08-29 19:42:27,168 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:42:27" (1/1) ... [2023-08-29 19:42:27,203 INFO L138 Inliner]: procedures = 277, calls = 39, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 156 [2023-08-29 19:42:27,203 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-29 19:42:27,205 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-29 19:42:27,205 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-29 19:42:27,205 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-29 19:42:27,213 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:42:27" (1/1) ... [2023-08-29 19:42:27,214 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:42:27" (1/1) ... [2023-08-29 19:42:27,231 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:42:27" (1/1) ... [2023-08-29 19:42:27,232 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:42:27" (1/1) ... [2023-08-29 19:42:27,238 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:42:27" (1/1) ... [2023-08-29 19:42:27,249 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:42:27" (1/1) ... [2023-08-29 19:42:27,252 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:42:27" (1/1) ... [2023-08-29 19:42:27,259 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:42:27" (1/1) ... [2023-08-29 19:42:27,262 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-29 19:42:27,267 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-29 19:42:27,268 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-29 19:42:27,268 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-29 19:42:27,269 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:42:27" (1/1) ... [2023-08-29 19:42:27,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 19:42:27,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:42:27,302 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-29 19:42:27,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-29 19:42:27,356 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-29 19:42:27,356 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-29 19:42:27,356 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-29 19:42:27,356 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-29 19:42:27,357 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-29 19:42:27,357 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-29 19:42:27,358 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-29 19:42:27,358 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-29 19:42:27,358 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-29 19:42:27,358 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-29 19:42:27,359 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-29 19:42:27,359 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-29 19:42:27,359 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-29 19:42:27,360 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-29 19:42:27,537 INFO L236 CfgBuilder]: Building ICFG [2023-08-29 19:42:27,539 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-29 19:42:27,819 INFO L277 CfgBuilder]: Performing block encoding [2023-08-29 19:42:27,828 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-29 19:42:27,829 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-29 19:42:27,832 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 07:42:27 BoogieIcfgContainer [2023-08-29 19:42:27,832 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-29 19:42:27,835 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-29 19:42:27,835 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-29 19:42:27,838 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-29 19:42:27,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 07:42:26" (1/3) ... [2023-08-29 19:42:27,839 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c96abec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 07:42:27, skipping insertion in model container [2023-08-29 19:42:27,839 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:42:27" (2/3) ... [2023-08-29 19:42:27,839 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c96abec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 07:42:27, skipping insertion in model container [2023-08-29 19:42:27,839 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 07:42:27" (3/3) ... [2023-08-29 19:42:27,840 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longer-1.i [2023-08-29 19:42:27,857 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-29 19:42:27,857 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2023-08-29 19:42:27,857 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-29 19:42:27,982 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-29 19:42:28,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 171 places, 174 transitions, 364 flow [2023-08-29 19:42:28,111 INFO L130 PetriNetUnfolder]: 10/172 cut-off events. [2023-08-29 19:42:28,112 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 19:42:28,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181 conditions, 172 events. 10/172 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 447 event pairs, 0 based on Foata normal form. 0/147 useless extension candidates. Maximal degree in co-relation 126. Up to 3 conditions per place. [2023-08-29 19:42:28,118 INFO L82 GeneralOperation]: Start removeDead. Operand has 171 places, 174 transitions, 364 flow [2023-08-29 19:42:28,125 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 165 places, 168 transitions, 348 flow [2023-08-29 19:42:28,129 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 19:42:28,148 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 165 places, 168 transitions, 348 flow [2023-08-29 19:42:28,150 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 165 places, 168 transitions, 348 flow [2023-08-29 19:42:28,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 165 places, 168 transitions, 348 flow [2023-08-29 19:42:28,181 INFO L130 PetriNetUnfolder]: 10/168 cut-off events. [2023-08-29 19:42:28,182 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 19:42:28,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177 conditions, 168 events. 10/168 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 442 event pairs, 0 based on Foata normal form. 0/144 useless extension candidates. Maximal degree in co-relation 126. Up to 3 conditions per place. [2023-08-29 19:42:28,188 INFO L119 LiptonReduction]: Number of co-enabled transitions 8718 [2023-08-29 19:42:32,606 INFO L134 LiptonReduction]: Checked pairs total: 13763 [2023-08-29 19:42:32,606 INFO L136 LiptonReduction]: Total number of compositions: 165 [2023-08-29 19:42:32,618 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 19:42:32,624 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;@51d37c6e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 19:42:32,624 INFO L358 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2023-08-29 19:42:32,626 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-29 19:42:32,626 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 19:42:32,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:42:32,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-29 19:42:32,627 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:42:32,631 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:42:32,631 INFO L85 PathProgramCache]: Analyzing trace with hash 709, now seen corresponding path program 1 times [2023-08-29 19:42:32,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:42:32,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829383873] [2023-08-29 19:42:32,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:42:32,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:42:32,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:42:32,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:42:32,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:42:32,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829383873] [2023-08-29 19:42:32,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829383873] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:42:32,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:42:32,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-29 19:42:32,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669826238] [2023-08-29 19:42:32,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:42:32,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-29 19:42:32,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:42:32,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-29 19:42:32,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-29 19:42:32,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 339 [2023-08-29 19:42:32,777 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 47 transitions, 106 flow. Second operand has 2 states, 2 states have (on average 163.5) internal successors, (327), 2 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) [2023-08-29 19:42:32,777 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:42:32,777 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 339 [2023-08-29 19:42:32,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:42:33,057 INFO L130 PetriNetUnfolder]: 1456/2263 cut-off events. [2023-08-29 19:42:33,057 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-29 19:42:33,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4548 conditions, 2263 events. 1456/2263 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 10457 event pairs, 1176 based on Foata normal form. 0/1293 useless extension candidates. Maximal degree in co-relation 4296. Up to 2240 conditions per place. [2023-08-29 19:42:33,073 INFO L137 encePairwiseOnDemand]: 337/339 looper letters, 44 selfloop transitions, 0 changer transitions 0/45 dead transitions. [2023-08-29 19:42:33,074 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 45 transitions, 190 flow [2023-08-29 19:42:33,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-29 19:42:33,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-29 19:42:33,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 372 transitions. [2023-08-29 19:42:33,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5486725663716814 [2023-08-29 19:42:33,087 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 372 transitions. [2023-08-29 19:42:33,087 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 372 transitions. [2023-08-29 19:42:33,089 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:42:33,090 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 372 transitions. [2023-08-29 19:42:33,094 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 186.0) internal successors, (372), 2 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:33,098 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 339.0) internal successors, (1017), 3 states have internal predecessors, (1017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:33,099 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 339.0) internal successors, (1017), 3 states have internal predecessors, (1017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:33,101 INFO L175 Difference]: Start difference. First operand has 49 places, 47 transitions, 106 flow. Second operand 2 states and 372 transitions. [2023-08-29 19:42:33,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 45 transitions, 190 flow [2023-08-29 19:42:33,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 45 transitions, 182 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-29 19:42:33,105 INFO L231 Difference]: Finished difference. Result has 44 places, 45 transitions, 94 flow [2023-08-29 19:42:33,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=94, PETRI_PLACES=44, PETRI_TRANSITIONS=45} [2023-08-29 19:42:33,109 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -5 predicate places. [2023-08-29 19:42:33,110 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 45 transitions, 94 flow [2023-08-29 19:42:33,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 163.5) internal successors, (327), 2 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) [2023-08-29 19:42:33,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:42:33,110 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 19:42:33,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-29 19:42:33,111 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:42:33,111 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:42:33,111 INFO L85 PathProgramCache]: Analyzing trace with hash 695919, now seen corresponding path program 1 times [2023-08-29 19:42:33,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:42:33,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250377128] [2023-08-29 19:42:33,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:42:33,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:42:33,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:42:33,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:42:33,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:42:33,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250377128] [2023-08-29 19:42:33,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250377128] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:42:33,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:42:33,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 19:42:33,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789899753] [2023-08-29 19:42:33,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:42:33,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:42:33,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:42:33,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:42:33,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:42:33,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 339 [2023-08-29 19:42:33,371 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 45 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:33,371 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:42:33,371 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 339 [2023-08-29 19:42:33,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:42:33,574 INFO L130 PetriNetUnfolder]: 1427/2208 cut-off events. [2023-08-29 19:42:33,574 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2023-08-29 19:42:33,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4409 conditions, 2208 events. 1427/2208 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 10100 event pairs, 1152 based on Foata normal form. 0/1274 useless extension candidates. Maximal degree in co-relation 4406. Up to 2183 conditions per place. [2023-08-29 19:42:33,584 INFO L137 encePairwiseOnDemand]: 335/339 looper letters, 40 selfloop transitions, 2 changer transitions 0/43 dead transitions. [2023-08-29 19:42:33,585 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 43 transitions, 174 flow [2023-08-29 19:42:33,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:42:33,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:42:33,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 518 transitions. [2023-08-29 19:42:33,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5093411996066863 [2023-08-29 19:42:33,588 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 518 transitions. [2023-08-29 19:42:33,588 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 518 transitions. [2023-08-29 19:42:33,588 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:42:33,589 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 518 transitions. [2023-08-29 19:42:33,590 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 172.66666666666666) internal successors, (518), 3 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:33,592 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:33,593 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:33,593 INFO L175 Difference]: Start difference. First operand has 44 places, 45 transitions, 94 flow. Second operand 3 states and 518 transitions. [2023-08-29 19:42:33,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 43 transitions, 174 flow [2023-08-29 19:42:33,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 43 transitions, 174 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 19:42:33,595 INFO L231 Difference]: Finished difference. Result has 44 places, 43 transitions, 94 flow [2023-08-29 19:42:33,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=44, PETRI_TRANSITIONS=43} [2023-08-29 19:42:33,596 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -5 predicate places. [2023-08-29 19:42:33,596 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 43 transitions, 94 flow [2023-08-29 19:42:33,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:33,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:42:33,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 19:42:33,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-29 19:42:33,597 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:42:33,598 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:42:33,598 INFO L85 PathProgramCache]: Analyzing trace with hash 695920, now seen corresponding path program 1 times [2023-08-29 19:42:33,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:42:33,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194298550] [2023-08-29 19:42:33,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:42:33,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:42:33,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:42:33,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:42:33,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:42:33,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194298550] [2023-08-29 19:42:33,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194298550] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:42:33,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:42:33,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 19:42:33,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811388891] [2023-08-29 19:42:33,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:42:33,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:42:33,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:42:33,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:42:33,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:42:33,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 339 [2023-08-29 19:42:33,735 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 43 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:33,735 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:42:33,735 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 339 [2023-08-29 19:42:33,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:42:33,930 INFO L130 PetriNetUnfolder]: 1398/2153 cut-off events. [2023-08-29 19:42:33,931 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2023-08-29 19:42:33,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4302 conditions, 2153 events. 1398/2153 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 9752 event pairs, 1128 based on Foata normal form. 0/1255 useless extension candidates. Maximal degree in co-relation 4298. Up to 2128 conditions per place. [2023-08-29 19:42:33,941 INFO L137 encePairwiseOnDemand]: 335/339 looper letters, 38 selfloop transitions, 2 changer transitions 0/41 dead transitions. [2023-08-29 19:42:33,942 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 41 transitions, 170 flow [2023-08-29 19:42:33,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:42:33,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:42:33,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 504 transitions. [2023-08-29 19:42:33,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49557522123893805 [2023-08-29 19:42:33,945 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 504 transitions. [2023-08-29 19:42:33,945 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 504 transitions. [2023-08-29 19:42:33,945 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:42:33,945 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 504 transitions. [2023-08-29 19:42:33,947 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:33,949 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:33,949 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:33,950 INFO L175 Difference]: Start difference. First operand has 44 places, 43 transitions, 94 flow. Second operand 3 states and 504 transitions. [2023-08-29 19:42:33,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 41 transitions, 170 flow [2023-08-29 19:42:33,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 41 transitions, 166 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:42:33,951 INFO L231 Difference]: Finished difference. Result has 42 places, 41 transitions, 90 flow [2023-08-29 19:42:33,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=42, PETRI_TRANSITIONS=41} [2023-08-29 19:42:33,952 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -7 predicate places. [2023-08-29 19:42:33,952 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 41 transitions, 90 flow [2023-08-29 19:42:33,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:33,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:42:33,953 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 19:42:33,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-29 19:42:33,954 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:42:33,954 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:42:33,954 INFO L85 PathProgramCache]: Analyzing trace with hash 668793599, now seen corresponding path program 1 times [2023-08-29 19:42:33,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:42:33,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045918087] [2023-08-29 19:42:33,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:42:33,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:42:33,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:42:34,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:42:34,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:42:34,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045918087] [2023-08-29 19:42:34,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045918087] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:42:34,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:42:34,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:42:34,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312599326] [2023-08-29 19:42:34,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:42:34,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 19:42:34,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:42:34,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 19:42:34,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 19:42:34,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 339 [2023-08-29 19:42:34,100 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 41 transitions, 90 flow. Second operand has 4 states, 4 states have (on average 151.25) internal successors, (605), 4 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:34,101 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:42:34,101 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 339 [2023-08-29 19:42:34,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:42:34,244 INFO L130 PetriNetUnfolder]: 1021/1601 cut-off events. [2023-08-29 19:42:34,244 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2023-08-29 19:42:34,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3204 conditions, 1601 events. 1021/1601 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 6948 event pairs, 816 based on Foata normal form. 0/1007 useless extension candidates. Maximal degree in co-relation 3200. Up to 1582 conditions per place. [2023-08-29 19:42:34,251 INFO L137 encePairwiseOnDemand]: 336/339 looper letters, 37 selfloop transitions, 2 changer transitions 0/40 dead transitions. [2023-08-29 19:42:34,251 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 40 transitions, 166 flow [2023-08-29 19:42:34,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:42:34,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:42:34,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 490 transitions. [2023-08-29 19:42:34,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48180924287118976 [2023-08-29 19:42:34,260 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 490 transitions. [2023-08-29 19:42:34,260 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 490 transitions. [2023-08-29 19:42:34,260 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:42:34,260 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 490 transitions. [2023-08-29 19:42:34,261 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:34,267 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:34,268 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:34,268 INFO L175 Difference]: Start difference. First operand has 42 places, 41 transitions, 90 flow. Second operand 3 states and 490 transitions. [2023-08-29 19:42:34,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 40 transitions, 166 flow [2023-08-29 19:42:34,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 40 transitions, 162 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:42:34,269 INFO L231 Difference]: Finished difference. Result has 41 places, 40 transitions, 88 flow [2023-08-29 19:42:34,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=41, PETRI_TRANSITIONS=40} [2023-08-29 19:42:34,272 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -8 predicate places. [2023-08-29 19:42:34,272 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 40 transitions, 88 flow [2023-08-29 19:42:34,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 151.25) internal successors, (605), 4 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:34,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:42:34,273 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 19:42:34,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-29 19:42:34,273 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:42:34,274 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:42:34,274 INFO L85 PathProgramCache]: Analyzing trace with hash 668793600, now seen corresponding path program 1 times [2023-08-29 19:42:34,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:42:34,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084088911] [2023-08-29 19:42:34,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:42:34,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:42:34,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:42:34,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:42:34,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:42:34,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084088911] [2023-08-29 19:42:34,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084088911] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:42:34,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:42:34,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 19:42:34,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807107671] [2023-08-29 19:42:34,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:42:34,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:42:34,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:42:34,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:42:34,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:42:34,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 339 [2023-08-29 19:42:34,376 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 40 transitions, 88 flow. Second operand has 3 states, 3 states have (on average 156.66666666666666) internal successors, (470), 3 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:34,377 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:42:34,377 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 339 [2023-08-29 19:42:34,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:42:34,480 INFO L130 PetriNetUnfolder]: 644/1049 cut-off events. [2023-08-29 19:42:34,481 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2023-08-29 19:42:34,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2106 conditions, 1049 events. 644/1049 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 4379 event pairs, 504 based on Foata normal form. 0/759 useless extension candidates. Maximal degree in co-relation 2102. Up to 1036 conditions per place. [2023-08-29 19:42:34,485 INFO L137 encePairwiseOnDemand]: 336/339 looper letters, 36 selfloop transitions, 2 changer transitions 0/39 dead transitions. [2023-08-29 19:42:34,485 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 39 transitions, 162 flow [2023-08-29 19:42:34,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:42:34,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:42:34,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 504 transitions. [2023-08-29 19:42:34,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49557522123893805 [2023-08-29 19:42:34,487 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 504 transitions. [2023-08-29 19:42:34,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 504 transitions. [2023-08-29 19:42:34,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:42:34,488 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 504 transitions. [2023-08-29 19:42:34,489 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:34,491 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:34,492 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:34,492 INFO L175 Difference]: Start difference. First operand has 41 places, 40 transitions, 88 flow. Second operand 3 states and 504 transitions. [2023-08-29 19:42:34,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 39 transitions, 162 flow [2023-08-29 19:42:34,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 39 transitions, 158 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:42:34,493 INFO L231 Difference]: Finished difference. Result has 40 places, 39 transitions, 86 flow [2023-08-29 19:42:34,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=40, PETRI_TRANSITIONS=39} [2023-08-29 19:42:34,494 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -9 predicate places. [2023-08-29 19:42:34,494 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 39 transitions, 86 flow [2023-08-29 19:42:34,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 156.66666666666666) internal successors, (470), 3 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:34,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:42:34,495 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 19:42:34,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-29 19:42:34,495 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:42:34,496 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:42:34,496 INFO L85 PathProgramCache]: Analyzing trace with hash -742837340, now seen corresponding path program 1 times [2023-08-29 19:42:34,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:42:34,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189741586] [2023-08-29 19:42:34,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:42:34,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:42:34,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:42:34,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:42:34,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:42:34,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189741586] [2023-08-29 19:42:34,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189741586] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:42:34,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:42:34,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:42:34,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308294265] [2023-08-29 19:42:34,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:42:34,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 19:42:34,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:42:34,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 19:42:34,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 19:42:34,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 339 [2023-08-29 19:42:34,709 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 39 transitions, 86 flow. Second operand has 4 states, 4 states have (on average 157.5) internal successors, (630), 4 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:34,709 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:42:34,709 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 339 [2023-08-29 19:42:34,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:42:34,887 INFO L130 PetriNetUnfolder]: 793/1277 cut-off events. [2023-08-29 19:42:34,888 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2023-08-29 19:42:34,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2569 conditions, 1277 events. 793/1277 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 5739 event pairs, 153 based on Foata normal form. 0/937 useless extension candidates. Maximal degree in co-relation 2565. Up to 944 conditions per place. [2023-08-29 19:42:34,894 INFO L137 encePairwiseOnDemand]: 334/339 looper letters, 58 selfloop transitions, 5 changer transitions 0/64 dead transitions. [2023-08-29 19:42:34,894 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 64 transitions, 267 flow [2023-08-29 19:42:34,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 19:42:34,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 19:42:34,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 688 transitions. [2023-08-29 19:42:34,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5073746312684366 [2023-08-29 19:42:34,898 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 688 transitions. [2023-08-29 19:42:34,898 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 688 transitions. [2023-08-29 19:42:34,898 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:42:34,898 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 688 transitions. [2023-08-29 19:42:34,900 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:34,903 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 339.0) internal successors, (1695), 5 states have internal predecessors, (1695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:34,904 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 339.0) internal successors, (1695), 5 states have internal predecessors, (1695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:34,904 INFO L175 Difference]: Start difference. First operand has 40 places, 39 transitions, 86 flow. Second operand 4 states and 688 transitions. [2023-08-29 19:42:34,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 64 transitions, 267 flow [2023-08-29 19:42:34,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 64 transitions, 261 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:42:34,907 INFO L231 Difference]: Finished difference. Result has 41 places, 41 transitions, 104 flow [2023-08-29 19:42:34,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=104, PETRI_PLACES=41, PETRI_TRANSITIONS=41} [2023-08-29 19:42:34,910 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -8 predicate places. [2023-08-29 19:42:34,910 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 41 transitions, 104 flow [2023-08-29 19:42:34,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 157.5) internal successors, (630), 4 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:34,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:42:34,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 19:42:34,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-29 19:42:34,912 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:42:34,913 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:42:34,913 INFO L85 PathProgramCache]: Analyzing trace with hash -742837339, now seen corresponding path program 1 times [2023-08-29 19:42:34,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:42:34,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572189348] [2023-08-29 19:42:34,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:42:34,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:42:34,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:42:35,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:42:35,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:42:35,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572189348] [2023-08-29 19:42:35,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572189348] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:42:35,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:42:35,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:42:35,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551790663] [2023-08-29 19:42:35,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:42:35,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 19:42:35,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:42:35,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 19:42:35,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 19:42:35,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 339 [2023-08-29 19:42:35,218 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 41 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 158.5) internal successors, (634), 4 states have internal predecessors, (634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:35,218 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:42:35,218 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 339 [2023-08-29 19:42:35,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:42:35,433 INFO L130 PetriNetUnfolder]: 1053/1715 cut-off events. [2023-08-29 19:42:35,433 INFO L131 PetriNetUnfolder]: For 60/60 co-relation queries the response was YES. [2023-08-29 19:42:35,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3629 conditions, 1715 events. 1053/1715 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 7674 event pairs, 161 based on Foata normal form. 0/1311 useless extension candidates. Maximal degree in co-relation 3624. Up to 1262 conditions per place. [2023-08-29 19:42:35,441 INFO L137 encePairwiseOnDemand]: 333/339 looper letters, 75 selfloop transitions, 5 changer transitions 0/81 dead transitions. [2023-08-29 19:42:35,441 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 81 transitions, 354 flow [2023-08-29 19:42:35,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 19:42:35,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 19:42:35,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 707 transitions. [2023-08-29 19:42:35,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5213864306784661 [2023-08-29 19:42:35,444 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 707 transitions. [2023-08-29 19:42:35,444 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 707 transitions. [2023-08-29 19:42:35,445 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:42:35,445 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 707 transitions. [2023-08-29 19:42:35,446 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 176.75) internal successors, (707), 4 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:35,449 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 339.0) internal successors, (1695), 5 states have internal predecessors, (1695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:35,449 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 339.0) internal successors, (1695), 5 states have internal predecessors, (1695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:35,449 INFO L175 Difference]: Start difference. First operand has 41 places, 41 transitions, 104 flow. Second operand 4 states and 707 transitions. [2023-08-29 19:42:35,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 81 transitions, 354 flow [2023-08-29 19:42:35,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 81 transitions, 350 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 19:42:35,453 INFO L231 Difference]: Finished difference. Result has 45 places, 45 transitions, 138 flow [2023-08-29 19:42:35,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=45, PETRI_TRANSITIONS=45} [2023-08-29 19:42:35,454 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -4 predicate places. [2023-08-29 19:42:35,455 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 45 transitions, 138 flow [2023-08-29 19:42:35,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 158.5) internal successors, (634), 4 states have internal predecessors, (634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:35,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:42:35,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:42:35,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-29 19:42:35,456 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:42:35,456 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:42:35,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1408310531, now seen corresponding path program 1 times [2023-08-29 19:42:35,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:42:35,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098988009] [2023-08-29 19:42:35,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:42:35,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:42:35,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:42:35,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:42:35,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:42:35,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098988009] [2023-08-29 19:42:35,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098988009] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:42:35,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:42:35,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:42:35,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682482945] [2023-08-29 19:42:35,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:42:35,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:42:35,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:42:35,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:42:35,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:42:35,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 339 [2023-08-29 19:42:35,511 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 45 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:35,511 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:42:35,511 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 339 [2023-08-29 19:42:35,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:42:35,646 INFO L130 PetriNetUnfolder]: 702/1159 cut-off events. [2023-08-29 19:42:35,646 INFO L131 PetriNetUnfolder]: For 111/111 co-relation queries the response was YES. [2023-08-29 19:42:35,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2536 conditions, 1159 events. 702/1159 cut-off events. For 111/111 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 4447 event pairs, 315 based on Foata normal form. 22/933 useless extension candidates. Maximal degree in co-relation 2529. Up to 900 conditions per place. [2023-08-29 19:42:35,652 INFO L137 encePairwiseOnDemand]: 336/339 looper letters, 55 selfloop transitions, 2 changer transitions 0/58 dead transitions. [2023-08-29 19:42:35,652 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 58 transitions, 265 flow [2023-08-29 19:42:35,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:42:35,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:42:35,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 538 transitions. [2023-08-29 19:42:35,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5290068829891839 [2023-08-29 19:42:35,655 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 538 transitions. [2023-08-29 19:42:35,655 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 538 transitions. [2023-08-29 19:42:35,655 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:42:35,655 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 538 transitions. [2023-08-29 19:42:35,656 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 179.33333333333334) internal successors, (538), 3 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:35,658 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:35,658 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:35,658 INFO L175 Difference]: Start difference. First operand has 45 places, 45 transitions, 138 flow. Second operand 3 states and 538 transitions. [2023-08-29 19:42:35,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 58 transitions, 265 flow [2023-08-29 19:42:35,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 58 transitions, 257 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-29 19:42:35,661 INFO L231 Difference]: Finished difference. Result has 45 places, 42 transitions, 118 flow [2023-08-29 19:42:35,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=45, PETRI_TRANSITIONS=42} [2023-08-29 19:42:35,662 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -4 predicate places. [2023-08-29 19:42:35,662 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 42 transitions, 118 flow [2023-08-29 19:42:35,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:35,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:42:35,663 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:42:35,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-29 19:42:35,663 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:42:35,663 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:42:35,664 INFO L85 PathProgramCache]: Analyzing trace with hash 635935809, now seen corresponding path program 1 times [2023-08-29 19:42:35,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:42:35,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430658881] [2023-08-29 19:42:35,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:42:35,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:42:35,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:42:35,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:42:35,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:42:35,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430658881] [2023-08-29 19:42:35,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430658881] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:42:35,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:42:35,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:42:35,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823356811] [2023-08-29 19:42:35,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:42:35,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:42:35,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:42:35,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:42:35,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:42:35,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 339 [2023-08-29 19:42:35,717 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 42 transitions, 118 flow. Second operand has 3 states, 3 states have (on average 162.33333333333334) internal successors, (487), 3 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:35,717 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:42:35,717 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 339 [2023-08-29 19:42:35,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:42:35,855 INFO L130 PetriNetUnfolder]: 733/1208 cut-off events. [2023-08-29 19:42:35,855 INFO L131 PetriNetUnfolder]: For 129/129 co-relation queries the response was YES. [2023-08-29 19:42:35,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2692 conditions, 1208 events. 733/1208 cut-off events. For 129/129 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 4721 event pairs, 528 based on Foata normal form. 38/1028 useless extension candidates. Maximal degree in co-relation 2685. Up to 1102 conditions per place. [2023-08-29 19:42:35,862 INFO L137 encePairwiseOnDemand]: 336/339 looper letters, 56 selfloop transitions, 4 changer transitions 0/61 dead transitions. [2023-08-29 19:42:35,862 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 61 transitions, 281 flow [2023-08-29 19:42:35,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:42:35,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:42:35,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 534 transitions. [2023-08-29 19:42:35,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5250737463126843 [2023-08-29 19:42:35,864 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 534 transitions. [2023-08-29 19:42:35,864 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 534 transitions. [2023-08-29 19:42:35,865 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:42:35,865 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 534 transitions. [2023-08-29 19:42:35,866 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 178.0) internal successors, (534), 3 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:35,868 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:35,868 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:35,868 INFO L175 Difference]: Start difference. First operand has 45 places, 42 transitions, 118 flow. Second operand 3 states and 534 transitions. [2023-08-29 19:42:35,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 61 transitions, 281 flow [2023-08-29 19:42:35,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 61 transitions, 279 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 19:42:35,870 INFO L231 Difference]: Finished difference. Result has 47 places, 43 transitions, 136 flow [2023-08-29 19:42:35,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=47, PETRI_TRANSITIONS=43} [2023-08-29 19:42:35,871 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -2 predicate places. [2023-08-29 19:42:35,871 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 43 transitions, 136 flow [2023-08-29 19:42:35,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 162.33333333333334) internal successors, (487), 3 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:35,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:42:35,872 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:42:35,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-29 19:42:35,872 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:42:35,873 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:42:35,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1811534857, now seen corresponding path program 1 times [2023-08-29 19:42:35,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:42:35,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155865842] [2023-08-29 19:42:35,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:42:35,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:42:35,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:42:35,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:42:35,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:42:35,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155865842] [2023-08-29 19:42:35,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155865842] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:42:35,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:42:35,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 19:42:35,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578300086] [2023-08-29 19:42:35,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:42:35,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:42:35,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:42:35,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:42:35,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:42:35,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 339 [2023-08-29 19:42:35,914 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 43 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:35,914 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:42:35,914 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 339 [2023-08-29 19:42:35,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:42:36,058 INFO L130 PetriNetUnfolder]: 756/1233 cut-off events. [2023-08-29 19:42:36,059 INFO L131 PetriNetUnfolder]: For 174/174 co-relation queries the response was YES. [2023-08-29 19:42:36,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2910 conditions, 1233 events. 756/1233 cut-off events. For 174/174 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 5320 event pairs, 261 based on Foata normal form. 0/1021 useless extension candidates. Maximal degree in co-relation 2902. Up to 1007 conditions per place. [2023-08-29 19:42:36,065 INFO L137 encePairwiseOnDemand]: 336/339 looper letters, 62 selfloop transitions, 2 changer transitions 0/65 dead transitions. [2023-08-29 19:42:36,066 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 65 transitions, 309 flow [2023-08-29 19:42:36,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:42:36,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:42:36,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 541 transitions. [2023-08-29 19:42:36,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5319567354965585 [2023-08-29 19:42:36,085 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 541 transitions. [2023-08-29 19:42:36,085 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 541 transitions. [2023-08-29 19:42:36,085 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:42:36,085 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 541 transitions. [2023-08-29 19:42:36,087 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 180.33333333333334) internal successors, (541), 3 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:36,088 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:36,089 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:36,089 INFO L175 Difference]: Start difference. First operand has 47 places, 43 transitions, 136 flow. Second operand 3 states and 541 transitions. [2023-08-29 19:42:36,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 65 transitions, 309 flow [2023-08-29 19:42:36,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 65 transitions, 303 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:42:36,092 INFO L231 Difference]: Finished difference. Result has 48 places, 43 transitions, 138 flow [2023-08-29 19:42:36,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=48, PETRI_TRANSITIONS=43} [2023-08-29 19:42:36,093 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -1 predicate places. [2023-08-29 19:42:36,093 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 43 transitions, 138 flow [2023-08-29 19:42:36,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:36,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:42:36,094 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:42:36,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-29 19:42:36,094 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:42:36,094 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:42:36,094 INFO L85 PathProgramCache]: Analyzing trace with hash 2007869220, now seen corresponding path program 1 times [2023-08-29 19:42:36,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:42:36,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403176765] [2023-08-29 19:42:36,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:42:36,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:42:36,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:42:36,373 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:42:36,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:42:36,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403176765] [2023-08-29 19:42:36,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403176765] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 19:42:36,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301287012] [2023-08-29 19:42:36,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:42:36,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:42:36,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:42:36,381 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) [2023-08-29 19:42:36,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-29 19:42:36,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:42:36,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-29 19:42:36,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:42:36,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 19:42:36,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 19:42:36,610 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-29 19:42:36,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 23 [2023-08-29 19:42:36,644 INFO L321 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2023-08-29 19:42:36,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 34 [2023-08-29 19:42:36,912 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:42:36,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 19:42:37,102 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:42:37,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301287012] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 19:42:37,103 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 19:42:37,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 16 [2023-08-29 19:42:37,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673443829] [2023-08-29 19:42:37,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 19:42:37,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-29 19:42:37,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:42:37,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-29 19:42:37,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2023-08-29 19:42:38,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 339 [2023-08-29 19:42:38,115 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 43 transitions, 138 flow. Second operand has 18 states, 18 states have (on average 148.33333333333334) internal successors, (2670), 18 states have internal predecessors, (2670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:38,115 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:42:38,115 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 339 [2023-08-29 19:42:38,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:42:39,038 INFO L130 PetriNetUnfolder]: 1800/2943 cut-off events. [2023-08-29 19:42:39,039 INFO L131 PetriNetUnfolder]: For 587/587 co-relation queries the response was YES. [2023-08-29 19:42:39,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7023 conditions, 2943 events. 1800/2943 cut-off events. For 587/587 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 13825 event pairs, 193 based on Foata normal form. 44/2547 useless extension candidates. Maximal degree in co-relation 7014. Up to 1107 conditions per place. [2023-08-29 19:42:39,061 INFO L137 encePairwiseOnDemand]: 330/339 looper letters, 177 selfloop transitions, 17 changer transitions 0/195 dead transitions. [2023-08-29 19:42:39,061 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 195 transitions, 905 flow [2023-08-29 19:42:39,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-29 19:42:39,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-29 19:42:39,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1949 transitions. [2023-08-29 19:42:39,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47910521140609635 [2023-08-29 19:42:39,067 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1949 transitions. [2023-08-29 19:42:39,067 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1949 transitions. [2023-08-29 19:42:39,068 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:42:39,068 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1949 transitions. [2023-08-29 19:42:39,072 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 162.41666666666666) internal successors, (1949), 12 states have internal predecessors, (1949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:39,078 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 339.0) internal successors, (4407), 13 states have internal predecessors, (4407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:39,080 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 339.0) internal successors, (4407), 13 states have internal predecessors, (4407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:39,080 INFO L175 Difference]: Start difference. First operand has 48 places, 43 transitions, 138 flow. Second operand 12 states and 1949 transitions. [2023-08-29 19:42:39,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 195 transitions, 905 flow [2023-08-29 19:42:39,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 195 transitions, 902 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 19:42:39,086 INFO L231 Difference]: Finished difference. Result has 65 places, 58 transitions, 270 flow [2023-08-29 19:42:39,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=270, PETRI_PLACES=65, PETRI_TRANSITIONS=58} [2023-08-29 19:42:39,087 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 16 predicate places. [2023-08-29 19:42:39,087 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 58 transitions, 270 flow [2023-08-29 19:42:39,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 148.33333333333334) internal successors, (2670), 18 states have internal predecessors, (2670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:39,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:42:39,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:42:39,099 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-29 19:42:39,295 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,SelfDestructingSolverStorable10 [2023-08-29 19:42:39,295 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:42:39,295 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:42:39,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1422879367, now seen corresponding path program 1 times [2023-08-29 19:42:39,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:42:39,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909427774] [2023-08-29 19:42:39,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:42:39,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:42:39,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:42:39,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:42:39,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:42:39,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909427774] [2023-08-29 19:42:39,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909427774] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:42:39,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:42:39,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 19:42:39,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480776298] [2023-08-29 19:42:39,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:42:39,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:42:39,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:42:39,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:42:39,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:42:39,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 339 [2023-08-29 19:42:39,394 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 58 transitions, 270 flow. Second operand has 3 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:39,394 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:42:39,394 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 339 [2023-08-29 19:42:39,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:42:39,529 INFO L130 PetriNetUnfolder]: 556/1039 cut-off events. [2023-08-29 19:42:39,530 INFO L131 PetriNetUnfolder]: For 427/427 co-relation queries the response was YES. [2023-08-29 19:42:39,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2777 conditions, 1039 events. 556/1039 cut-off events. For 427/427 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 4271 event pairs, 73 based on Foata normal form. 42/1019 useless extension candidates. Maximal degree in co-relation 2761. Up to 817 conditions per place. [2023-08-29 19:42:39,534 INFO L137 encePairwiseOnDemand]: 334/339 looper letters, 52 selfloop transitions, 7 changer transitions 0/60 dead transitions. [2023-08-29 19:42:39,535 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 60 transitions, 368 flow [2023-08-29 19:42:39,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:42:39,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:42:39,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 519 transitions. [2023-08-29 19:42:39,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5103244837758112 [2023-08-29 19:42:39,537 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 519 transitions. [2023-08-29 19:42:39,537 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 519 transitions. [2023-08-29 19:42:39,537 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:42:39,537 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 519 transitions. [2023-08-29 19:42:39,539 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 173.0) internal successors, (519), 3 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:39,541 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:39,541 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:39,541 INFO L175 Difference]: Start difference. First operand has 65 places, 58 transitions, 270 flow. Second operand 3 states and 519 transitions. [2023-08-29 19:42:39,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 60 transitions, 368 flow [2023-08-29 19:42:39,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 60 transitions, 348 flow, removed 7 selfloop flow, removed 4 redundant places. [2023-08-29 19:42:39,545 INFO L231 Difference]: Finished difference. Result has 61 places, 51 transitions, 220 flow [2023-08-29 19:42:39,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=220, PETRI_PLACES=61, PETRI_TRANSITIONS=51} [2023-08-29 19:42:39,547 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 12 predicate places. [2023-08-29 19:42:39,547 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 51 transitions, 220 flow [2023-08-29 19:42:39,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:39,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:42:39,548 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:42:39,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-29 19:42:39,549 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:42:39,549 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:42:39,549 INFO L85 PathProgramCache]: Analyzing trace with hash 1525694433, now seen corresponding path program 1 times [2023-08-29 19:42:39,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:42:39,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663268996] [2023-08-29 19:42:39,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:42:39,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:42:39,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:42:39,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:42:39,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:42:39,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663268996] [2023-08-29 19:42:39,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663268996] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:42:39,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:42:39,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-08-29 19:42:39,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295977311] [2023-08-29 19:42:39,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:42:39,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-29 19:42:39,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:42:39,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-29 19:42:39,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-08-29 19:42:40,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 339 [2023-08-29 19:42:40,659 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 51 transitions, 220 flow. Second operand has 12 states, 12 states have (on average 143.66666666666666) internal successors, (1724), 12 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:40,659 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:42:40,659 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 339 [2023-08-29 19:42:40,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:42:41,320 INFO L130 PetriNetUnfolder]: 728/1357 cut-off events. [2023-08-29 19:42:41,320 INFO L131 PetriNetUnfolder]: For 469/469 co-relation queries the response was YES. [2023-08-29 19:42:41,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3629 conditions, 1357 events. 728/1357 cut-off events. For 469/469 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 6042 event pairs, 104 based on Foata normal form. 6/1321 useless extension candidates. Maximal degree in co-relation 3614. Up to 694 conditions per place. [2023-08-29 19:42:41,327 INFO L137 encePairwiseOnDemand]: 326/339 looper letters, 134 selfloop transitions, 17 changer transitions 0/152 dead transitions. [2023-08-29 19:42:41,327 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 152 transitions, 846 flow [2023-08-29 19:42:41,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-29 19:42:41,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-29 19:42:41,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1854 transitions. [2023-08-29 19:42:41,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4557522123893805 [2023-08-29 19:42:41,333 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1854 transitions. [2023-08-29 19:42:41,333 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1854 transitions. [2023-08-29 19:42:41,334 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:42:41,334 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1854 transitions. [2023-08-29 19:42:41,337 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 154.5) internal successors, (1854), 12 states have internal predecessors, (1854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:41,342 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 339.0) internal successors, (4407), 13 states have internal predecessors, (4407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:41,343 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 339.0) internal successors, (4407), 13 states have internal predecessors, (4407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:41,343 INFO L175 Difference]: Start difference. First operand has 61 places, 51 transitions, 220 flow. Second operand 12 states and 1854 transitions. [2023-08-29 19:42:41,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 152 transitions, 846 flow [2023-08-29 19:42:41,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 152 transitions, 826 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 19:42:41,349 INFO L231 Difference]: Finished difference. Result has 77 places, 62 transitions, 328 flow [2023-08-29 19:42:41,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=328, PETRI_PLACES=77, PETRI_TRANSITIONS=62} [2023-08-29 19:42:41,351 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 28 predicate places. [2023-08-29 19:42:41,351 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 62 transitions, 328 flow [2023-08-29 19:42:41,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 143.66666666666666) internal successors, (1724), 12 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:41,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:42:41,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:42:41,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-29 19:42:41,352 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:42:41,352 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:42:41,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1621935710, now seen corresponding path program 1 times [2023-08-29 19:42:41,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:42:41,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310054326] [2023-08-29 19:42:41,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:42:41,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:42:41,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:42:41,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:42:41,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:42:41,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310054326] [2023-08-29 19:42:41,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310054326] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:42:41,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:42:41,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-29 19:42:41,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146764887] [2023-08-29 19:42:41,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:42:41,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 19:42:41,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:42:41,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 19:42:41,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-08-29 19:42:41,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 339 [2023-08-29 19:42:41,653 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 62 transitions, 328 flow. Second operand has 6 states, 6 states have (on average 155.33333333333334) internal successors, (932), 6 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:41,653 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:42:41,653 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 339 [2023-08-29 19:42:41,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:42:41,923 INFO L130 PetriNetUnfolder]: 878/1631 cut-off events. [2023-08-29 19:42:41,923 INFO L131 PetriNetUnfolder]: For 893/893 co-relation queries the response was YES. [2023-08-29 19:42:41,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4707 conditions, 1631 events. 878/1631 cut-off events. For 893/893 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 7605 event pairs, 116 based on Foata normal form. 0/1613 useless extension candidates. Maximal degree in co-relation 4685. Up to 768 conditions per place. [2023-08-29 19:42:41,931 INFO L137 encePairwiseOnDemand]: 332/339 looper letters, 87 selfloop transitions, 9 changer transitions 0/97 dead transitions. [2023-08-29 19:42:41,931 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 97 transitions, 667 flow [2023-08-29 19:42:41,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-29 19:42:41,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-29 19:42:41,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1137 transitions. [2023-08-29 19:42:41,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47914032869785084 [2023-08-29 19:42:41,934 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1137 transitions. [2023-08-29 19:42:41,934 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1137 transitions. [2023-08-29 19:42:41,935 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:42:41,935 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1137 transitions. [2023-08-29 19:42:41,937 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 162.42857142857142) internal successors, (1137), 7 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:41,940 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 339.0) internal successors, (2712), 8 states have internal predecessors, (2712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:41,941 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 339.0) internal successors, (2712), 8 states have internal predecessors, (2712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:41,941 INFO L175 Difference]: Start difference. First operand has 77 places, 62 transitions, 328 flow. Second operand 7 states and 1137 transitions. [2023-08-29 19:42:41,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 97 transitions, 667 flow [2023-08-29 19:42:41,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 97 transitions, 657 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-29 19:42:41,946 INFO L231 Difference]: Finished difference. Result has 81 places, 65 transitions, 369 flow [2023-08-29 19:42:41,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=369, PETRI_PLACES=81, PETRI_TRANSITIONS=65} [2023-08-29 19:42:41,947 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 32 predicate places. [2023-08-29 19:42:41,947 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 65 transitions, 369 flow [2023-08-29 19:42:41,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 155.33333333333334) internal successors, (932), 6 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:41,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:42:41,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:42:41,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-29 19:42:41,949 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:42:41,949 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:42:41,949 INFO L85 PathProgramCache]: Analyzing trace with hash -365350266, now seen corresponding path program 1 times [2023-08-29 19:42:41,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:42:41,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146635289] [2023-08-29 19:42:41,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:42:41,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:42:41,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:42:41,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:42:41,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:42:41,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146635289] [2023-08-29 19:42:41,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146635289] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:42:41,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:42:41,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 19:42:41,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708312104] [2023-08-29 19:42:41,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:42:41,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:42:41,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:42:41,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:42:41,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:42:41,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 339 [2023-08-29 19:42:41,994 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 65 transitions, 369 flow. Second operand has 3 states, 3 states have (on average 166.0) internal successors, (498), 3 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:41,994 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:42:41,995 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 339 [2023-08-29 19:42:41,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:42:42,238 INFO L130 PetriNetUnfolder]: 1115/2098 cut-off events. [2023-08-29 19:42:42,238 INFO L131 PetriNetUnfolder]: For 1660/1660 co-relation queries the response was YES. [2023-08-29 19:42:42,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6282 conditions, 2098 events. 1115/2098 cut-off events. For 1660/1660 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 10704 event pairs, 662 based on Foata normal form. 84/2146 useless extension candidates. Maximal degree in co-relation 6257. Up to 1548 conditions per place. [2023-08-29 19:42:42,255 INFO L137 encePairwiseOnDemand]: 335/339 looper letters, 107 selfloop transitions, 3 changer transitions 0/111 dead transitions. [2023-08-29 19:42:42,255 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 111 transitions, 852 flow [2023-08-29 19:42:42,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:42:42,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:42:42,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 542 transitions. [2023-08-29 19:42:42,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5329400196656834 [2023-08-29 19:42:42,257 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 542 transitions. [2023-08-29 19:42:42,257 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 542 transitions. [2023-08-29 19:42:42,257 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:42:42,258 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 542 transitions. [2023-08-29 19:42:42,259 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 180.66666666666666) internal successors, (542), 3 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:42,260 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:42,261 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:42,261 INFO L175 Difference]: Start difference. First operand has 81 places, 65 transitions, 369 flow. Second operand 3 states and 542 transitions. [2023-08-29 19:42:42,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 111 transitions, 852 flow [2023-08-29 19:42:42,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 111 transitions, 840 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-08-29 19:42:42,269 INFO L231 Difference]: Finished difference. Result has 82 places, 67 transitions, 383 flow [2023-08-29 19:42:42,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=383, PETRI_PLACES=82, PETRI_TRANSITIONS=67} [2023-08-29 19:42:42,271 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 33 predicate places. [2023-08-29 19:42:42,271 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 67 transitions, 383 flow [2023-08-29 19:42:42,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 166.0) internal successors, (498), 3 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:42,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:42:42,271 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:42:42,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-29 19:42:42,272 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:42:42,272 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:42:42,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1608419276, now seen corresponding path program 1 times [2023-08-29 19:42:42,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:42:42,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062909195] [2023-08-29 19:42:42,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:42:42,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:42:42,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:42:42,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:42:42,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:42:42,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062909195] [2023-08-29 19:42:42,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062909195] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:42:42,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:42:42,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-29 19:42:42,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592805440] [2023-08-29 19:42:42,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:42:42,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-29 19:42:42,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:42:42,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-29 19:42:42,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2023-08-29 19:42:44,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 339 [2023-08-29 19:42:44,039 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 67 transitions, 383 flow. Second operand has 15 states, 15 states have (on average 128.46666666666667) internal successors, (1927), 15 states have internal predecessors, (1927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:44,039 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:42:44,039 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 339 [2023-08-29 19:42:44,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:42:45,211 INFO L130 PetriNetUnfolder]: 1418/2685 cut-off events. [2023-08-29 19:42:45,211 INFO L131 PetriNetUnfolder]: For 2255/2255 co-relation queries the response was YES. [2023-08-29 19:42:45,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8443 conditions, 2685 events. 1418/2685 cut-off events. For 2255/2255 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 14483 event pairs, 338 based on Foata normal form. 12/2697 useless extension candidates. Maximal degree in co-relation 8417. Up to 1907 conditions per place. [2023-08-29 19:42:45,230 INFO L137 encePairwiseOnDemand]: 322/339 looper letters, 144 selfloop transitions, 31 changer transitions 0/176 dead transitions. [2023-08-29 19:42:45,231 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 176 transitions, 1183 flow [2023-08-29 19:42:45,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-29 19:42:45,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-29 19:42:45,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2433 transitions. [2023-08-29 19:42:45,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39872173058013766 [2023-08-29 19:42:45,237 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2433 transitions. [2023-08-29 19:42:45,237 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2433 transitions. [2023-08-29 19:42:45,239 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:42:45,239 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2433 transitions. [2023-08-29 19:42:45,243 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 135.16666666666666) internal successors, (2433), 18 states have internal predecessors, (2433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:45,252 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 339.0) internal successors, (6441), 19 states have internal predecessors, (6441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:45,253 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 339.0) internal successors, (6441), 19 states have internal predecessors, (6441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:45,285 INFO L175 Difference]: Start difference. First operand has 82 places, 67 transitions, 383 flow. Second operand 18 states and 2433 transitions. [2023-08-29 19:42:45,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 176 transitions, 1183 flow [2023-08-29 19:42:45,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 176 transitions, 1170 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 19:42:45,296 INFO L231 Difference]: Finished difference. Result has 106 places, 92 transitions, 628 flow [2023-08-29 19:42:45,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=380, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=628, PETRI_PLACES=106, PETRI_TRANSITIONS=92} [2023-08-29 19:42:45,297 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 57 predicate places. [2023-08-29 19:42:45,297 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 92 transitions, 628 flow [2023-08-29 19:42:45,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 128.46666666666667) internal successors, (1927), 15 states have internal predecessors, (1927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:45,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:42:45,298 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:42:45,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-29 19:42:45,298 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:42:45,299 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:42:45,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1883421570, now seen corresponding path program 2 times [2023-08-29 19:42:45,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:42:45,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231970671] [2023-08-29 19:42:45,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:42:45,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:42:45,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:42:46,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:42:46,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:42:46,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231970671] [2023-08-29 19:42:46,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231970671] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:42:46,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:42:46,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-08-29 19:42:46,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999638894] [2023-08-29 19:42:46,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:42:46,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-29 19:42:46,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:42:46,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-29 19:42:46,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2023-08-29 19:42:47,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 339 [2023-08-29 19:42:47,429 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 92 transitions, 628 flow. Second operand has 16 states, 16 states have (on average 124.375) internal successors, (1990), 16 states have internal predecessors, (1990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:47,429 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:42:47,430 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 339 [2023-08-29 19:42:47,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:42:48,535 INFO L130 PetriNetUnfolder]: 1711/3242 cut-off events. [2023-08-29 19:42:48,535 INFO L131 PetriNetUnfolder]: For 3166/3166 co-relation queries the response was YES. [2023-08-29 19:42:48,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10823 conditions, 3242 events. 1711/3242 cut-off events. For 3166/3166 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 18363 event pairs, 449 based on Foata normal form. 12/3254 useless extension candidates. Maximal degree in co-relation 10789. Up to 1937 conditions per place. [2023-08-29 19:42:48,556 INFO L137 encePairwiseOnDemand]: 322/339 looper letters, 143 selfloop transitions, 40 changer transitions 0/184 dead transitions. [2023-08-29 19:42:48,556 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 184 transitions, 1387 flow [2023-08-29 19:42:48,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-29 19:42:48,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-29 19:42:48,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1858 transitions. [2023-08-29 19:42:48,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3914875684787189 [2023-08-29 19:42:48,562 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1858 transitions. [2023-08-29 19:42:48,562 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1858 transitions. [2023-08-29 19:42:48,563 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:42:48,563 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1858 transitions. [2023-08-29 19:42:48,566 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 132.71428571428572) internal successors, (1858), 14 states have internal predecessors, (1858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:48,571 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 339.0) internal successors, (5085), 15 states have internal predecessors, (5085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:48,572 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 339.0) internal successors, (5085), 15 states have internal predecessors, (5085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:48,572 INFO L175 Difference]: Start difference. First operand has 106 places, 92 transitions, 628 flow. Second operand 14 states and 1858 transitions. [2023-08-29 19:42:48,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 184 transitions, 1387 flow [2023-08-29 19:42:48,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 184 transitions, 1362 flow, removed 5 selfloop flow, removed 4 redundant places. [2023-08-29 19:42:48,590 INFO L231 Difference]: Finished difference. Result has 122 places, 105 transitions, 851 flow [2023-08-29 19:42:48,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=607, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=851, PETRI_PLACES=122, PETRI_TRANSITIONS=105} [2023-08-29 19:42:48,591 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 73 predicate places. [2023-08-29 19:42:48,591 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 105 transitions, 851 flow [2023-08-29 19:42:48,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 124.375) internal successors, (1990), 16 states have internal predecessors, (1990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:48,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:42:48,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:42:48,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-29 19:42:48,592 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:42:48,592 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:42:48,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1987752546, now seen corresponding path program 3 times [2023-08-29 19:42:48,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:42:48,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111337728] [2023-08-29 19:42:48,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:42:48,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:42:48,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:42:49,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:42:49,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:42:49,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111337728] [2023-08-29 19:42:49,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111337728] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:42:49,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:42:49,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-08-29 19:42:49,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342987478] [2023-08-29 19:42:49,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:42:49,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-29 19:42:49,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:42:49,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-29 19:42:49,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2023-08-29 19:42:50,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 339 [2023-08-29 19:42:50,445 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 105 transitions, 851 flow. Second operand has 16 states, 16 states have (on average 125.375) internal successors, (2006), 16 states have internal predecessors, (2006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:50,445 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:42:50,445 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 339 [2023-08-29 19:42:50,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:42:51,508 INFO L130 PetriNetUnfolder]: 1699/3219 cut-off events. [2023-08-29 19:42:51,509 INFO L131 PetriNetUnfolder]: For 4161/4161 co-relation queries the response was YES. [2023-08-29 19:42:51,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11438 conditions, 3219 events. 1699/3219 cut-off events. For 4161/4161 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 18158 event pairs, 385 based on Foata normal form. 12/3231 useless extension candidates. Maximal degree in co-relation 11397. Up to 1403 conditions per place. [2023-08-29 19:42:51,534 INFO L137 encePairwiseOnDemand]: 322/339 looper letters, 132 selfloop transitions, 53 changer transitions 0/186 dead transitions. [2023-08-29 19:42:51,534 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 186 transitions, 1532 flow [2023-08-29 19:42:51,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-29 19:42:51,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-29 19:42:51,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1996 transitions. [2023-08-29 19:42:51,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3925270403146509 [2023-08-29 19:42:51,540 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1996 transitions. [2023-08-29 19:42:51,540 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1996 transitions. [2023-08-29 19:42:51,541 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:42:51,541 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1996 transitions. [2023-08-29 19:42:51,545 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 133.06666666666666) internal successors, (1996), 15 states have internal predecessors, (1996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:51,551 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 339.0) internal successors, (5424), 16 states have internal predecessors, (5424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:51,552 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 339.0) internal successors, (5424), 16 states have internal predecessors, (5424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:51,552 INFO L175 Difference]: Start difference. First operand has 122 places, 105 transitions, 851 flow. Second operand 15 states and 1996 transitions. [2023-08-29 19:42:51,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 186 transitions, 1532 flow [2023-08-29 19:42:51,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 186 transitions, 1477 flow, removed 16 selfloop flow, removed 5 redundant places. [2023-08-29 19:42:51,576 INFO L231 Difference]: Finished difference. Result has 135 places, 112 transitions, 1011 flow [2023-08-29 19:42:51,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=804, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1011, PETRI_PLACES=135, PETRI_TRANSITIONS=112} [2023-08-29 19:42:51,576 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 86 predicate places. [2023-08-29 19:42:51,577 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 112 transitions, 1011 flow [2023-08-29 19:42:51,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 125.375) internal successors, (2006), 16 states have internal predecessors, (2006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:51,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:42:51,578 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-08-29 19:42:51,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-29 19:42:51,578 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:42:51,578 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:42:51,578 INFO L85 PathProgramCache]: Analyzing trace with hash 863120243, now seen corresponding path program 1 times [2023-08-29 19:42:51,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:42:51,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376068405] [2023-08-29 19:42:51,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:42:51,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:42:51,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:42:51,663 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:42:51,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:42:51,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376068405] [2023-08-29 19:42:51,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376068405] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 19:42:51,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831345720] [2023-08-29 19:42:51,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:42:51,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:42:51,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:42:51,669 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) [2023-08-29 19:42:51,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-29 19:42:51,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:42:51,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-29 19:42:51,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:42:51,822 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:42:51,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 19:42:51,885 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:42:51,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831345720] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 19:42:51,885 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 19:42:51,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-08-29 19:42:51,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607769847] [2023-08-29 19:42:51,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 19:42:51,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-29 19:42:51,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:42:51,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-29 19:42:51,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-08-29 19:42:51,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 339 [2023-08-29 19:42:51,949 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 112 transitions, 1011 flow. Second operand has 14 states, 14 states have (on average 159.71428571428572) internal successors, (2236), 14 states have internal predecessors, (2236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:51,949 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:42:51,949 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 339 [2023-08-29 19:42:51,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:42:52,714 INFO L130 PetriNetUnfolder]: 2454/4656 cut-off events. [2023-08-29 19:42:52,714 INFO L131 PetriNetUnfolder]: For 6794/6794 co-relation queries the response was YES. [2023-08-29 19:42:52,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16656 conditions, 4656 events. 2454/4656 cut-off events. For 6794/6794 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 25062 event pairs, 665 based on Foata normal form. 54/4710 useless extension candidates. Maximal degree in co-relation 16610. Up to 1655 conditions per place. [2023-08-29 19:42:52,745 INFO L137 encePairwiseOnDemand]: 333/339 looper letters, 239 selfloop transitions, 40 changer transitions 0/280 dead transitions. [2023-08-29 19:42:52,745 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 280 transitions, 2427 flow [2023-08-29 19:42:52,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-29 19:42:52,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-29 19:42:52,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1907 transitions. [2023-08-29 19:42:52,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5113971574148566 [2023-08-29 19:42:52,749 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1907 transitions. [2023-08-29 19:42:52,749 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1907 transitions. [2023-08-29 19:42:52,750 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:42:52,750 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1907 transitions. [2023-08-29 19:42:52,752 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 173.36363636363637) internal successors, (1907), 11 states have internal predecessors, (1907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:52,757 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 339.0) internal successors, (4068), 12 states have internal predecessors, (4068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:52,758 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 339.0) internal successors, (4068), 12 states have internal predecessors, (4068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:52,758 INFO L175 Difference]: Start difference. First operand has 135 places, 112 transitions, 1011 flow. Second operand 11 states and 1907 transitions. [2023-08-29 19:42:52,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 280 transitions, 2427 flow [2023-08-29 19:42:52,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 280 transitions, 2352 flow, removed 14 selfloop flow, removed 9 redundant places. [2023-08-29 19:42:52,795 INFO L231 Difference]: Finished difference. Result has 141 places, 137 transitions, 1282 flow [2023-08-29 19:42:52,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=952, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1282, PETRI_PLACES=141, PETRI_TRANSITIONS=137} [2023-08-29 19:42:52,796 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 92 predicate places. [2023-08-29 19:42:52,796 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 137 transitions, 1282 flow [2023-08-29 19:42:52,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 159.71428571428572) internal successors, (2236), 14 states have internal predecessors, (2236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:52,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:42:52,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:42:52,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-29 19:42:53,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:42:53,004 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:42:53,005 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:42:53,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1532241505, now seen corresponding path program 1 times [2023-08-29 19:42:53,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:42:53,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105296914] [2023-08-29 19:42:53,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:42:53,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:42:53,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:42:53,098 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:42:53,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:42:53,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105296914] [2023-08-29 19:42:53,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105296914] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 19:42:53,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221529671] [2023-08-29 19:42:53,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:42:53,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:42:53,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:42:53,100 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 19:42:53,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-29 19:42:53,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:42:53,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-29 19:42:53,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:42:53,228 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:42:53,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 19:42:53,250 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:42:53,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221529671] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 19:42:53,251 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 19:42:53,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-08-29 19:42:53,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297279454] [2023-08-29 19:42:53,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 19:42:53,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 19:42:53,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:42:53,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 19:42:53,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-29 19:42:53,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 339 [2023-08-29 19:42:53,268 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 137 transitions, 1282 flow. Second operand has 7 states, 7 states have (on average 163.14285714285714) internal successors, (1142), 7 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:53,268 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:42:53,268 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 339 [2023-08-29 19:42:53,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:42:54,480 INFO L130 PetriNetUnfolder]: 4799/9383 cut-off events. [2023-08-29 19:42:54,480 INFO L131 PetriNetUnfolder]: For 17714/17714 co-relation queries the response was YES. [2023-08-29 19:42:54,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34589 conditions, 9383 events. 4799/9383 cut-off events. For 17714/17714 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 62567 event pairs, 1181 based on Foata normal form. 1218/10601 useless extension candidates. Maximal degree in co-relation 34537. Up to 2316 conditions per place. [2023-08-29 19:42:54,545 INFO L137 encePairwiseOnDemand]: 334/339 looper letters, 455 selfloop transitions, 22 changer transitions 0/478 dead transitions. [2023-08-29 19:42:54,545 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 478 transitions, 5496 flow [2023-08-29 19:42:54,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 19:42:54,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 19:42:54,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1088 transitions. [2023-08-29 19:42:54,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5349065880039331 [2023-08-29 19:42:54,551 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1088 transitions. [2023-08-29 19:42:54,551 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1088 transitions. [2023-08-29 19:42:54,554 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:42:54,554 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1088 transitions. [2023-08-29 19:42:54,555 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 181.33333333333334) internal successors, (1088), 6 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:54,558 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 339.0) internal successors, (2373), 7 states have internal predecessors, (2373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:54,558 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 339.0) internal successors, (2373), 7 states have internal predecessors, (2373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:54,558 INFO L175 Difference]: Start difference. First operand has 141 places, 137 transitions, 1282 flow. Second operand 6 states and 1088 transitions. [2023-08-29 19:42:54,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 478 transitions, 5496 flow [2023-08-29 19:42:54,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 478 transitions, 5290 flow, removed 103 selfloop flow, removed 0 redundant places. [2023-08-29 19:42:54,688 INFO L231 Difference]: Finished difference. Result has 150 places, 148 transitions, 1433 flow [2023-08-29 19:42:54,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=1230, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1433, PETRI_PLACES=150, PETRI_TRANSITIONS=148} [2023-08-29 19:42:54,689 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 101 predicate places. [2023-08-29 19:42:54,689 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 148 transitions, 1433 flow [2023-08-29 19:42:54,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 163.14285714285714) internal successors, (1142), 7 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:54,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:42:54,690 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:42:54,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-29 19:42:54,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:42:54,895 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:42:54,896 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:42:54,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1765816214, now seen corresponding path program 1 times [2023-08-29 19:42:54,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:42:54,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203357995] [2023-08-29 19:42:54,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:42:54,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:42:54,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:42:55,251 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:42:55,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:42:55,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203357995] [2023-08-29 19:42:55,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203357995] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 19:42:55,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969630428] [2023-08-29 19:42:55,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:42:55,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:42:55,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:42:55,254 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 19:42:55,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-29 19:42:55,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:42:55,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-29 19:42:55,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:42:55,730 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:42:55,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 19:42:55,936 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 19:42:55,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 33 [2023-08-29 19:42:56,054 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:42:56,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969630428] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 19:42:56,055 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 19:42:56,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 26 [2023-08-29 19:42:56,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770514918] [2023-08-29 19:42:56,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 19:42:56,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-29 19:42:56,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:42:56,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-29 19:42:56,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2023-08-29 19:42:57,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 339 [2023-08-29 19:42:57,701 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 148 transitions, 1433 flow. Second operand has 28 states, 28 states have (on average 140.67857142857142) internal successors, (3939), 28 states have internal predecessors, (3939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:57,701 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:42:57,701 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 339 [2023-08-29 19:42:57,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:43:01,195 INFO L130 PetriNetUnfolder]: 5668/11194 cut-off events. [2023-08-29 19:43:01,196 INFO L131 PetriNetUnfolder]: For 27513/27513 co-relation queries the response was YES. [2023-08-29 19:43:01,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43337 conditions, 11194 events. 5668/11194 cut-off events. For 27513/27513 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 75941 event pairs, 577 based on Foata normal form. 322/11516 useless extension candidates. Maximal degree in co-relation 43281. Up to 2611 conditions per place. [2023-08-29 19:43:01,315 INFO L137 encePairwiseOnDemand]: 324/339 looper letters, 319 selfloop transitions, 107 changer transitions 0/427 dead transitions. [2023-08-29 19:43:01,316 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 427 transitions, 3893 flow [2023-08-29 19:43:01,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-29 19:43:01,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-29 19:43:01,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 4706 transitions. [2023-08-29 19:43:01,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4338126843657817 [2023-08-29 19:43:01,324 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 4706 transitions. [2023-08-29 19:43:01,324 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 4706 transitions. [2023-08-29 19:43:01,326 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:43:01,327 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 4706 transitions. [2023-08-29 19:43:01,334 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 147.0625) internal successors, (4706), 32 states have internal predecessors, (4706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:01,349 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 339.0) internal successors, (11187), 33 states have internal predecessors, (11187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:01,352 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 339.0) internal successors, (11187), 33 states have internal predecessors, (11187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:01,353 INFO L175 Difference]: Start difference. First operand has 150 places, 148 transitions, 1433 flow. Second operand 32 states and 4706 transitions. [2023-08-29 19:43:01,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 427 transitions, 3893 flow [2023-08-29 19:43:01,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 427 transitions, 3785 flow, removed 47 selfloop flow, removed 1 redundant places. [2023-08-29 19:43:01,484 INFO L231 Difference]: Finished difference. Result has 197 places, 202 transitions, 2231 flow [2023-08-29 19:43:01,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=1332, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=2231, PETRI_PLACES=197, PETRI_TRANSITIONS=202} [2023-08-29 19:43:01,485 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 148 predicate places. [2023-08-29 19:43:01,485 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 202 transitions, 2231 flow [2023-08-29 19:43:01,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 140.67857142857142) internal successors, (3939), 28 states have internal predecessors, (3939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:01,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:43:01,486 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:43:01,494 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-29 19:43:01,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:43:01,692 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:43:01,693 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:43:01,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1066183258, now seen corresponding path program 1 times [2023-08-29 19:43:01,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:43:01,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810147384] [2023-08-29 19:43:01,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:43:01,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:43:01,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:43:01,789 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:43:01,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:43:01,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810147384] [2023-08-29 19:43:01,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810147384] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 19:43:01,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556453837] [2023-08-29 19:43:01,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:43:01,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:43:01,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:43:01,793 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 19:43:01,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-29 19:43:01,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:43:01,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-29 19:43:01,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:43:01,953 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 19:43:01,954 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 19:43:01,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556453837] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:43:01,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-29 19:43:01,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2023-08-29 19:43:01,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774082603] [2023-08-29 19:43:01,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:43:01,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 19:43:01,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:43:01,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 19:43:01,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-08-29 19:43:01,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 339 [2023-08-29 19:43:01,984 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 202 transitions, 2231 flow. Second operand has 6 states, 6 states have (on average 157.0) internal successors, (942), 6 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:01,984 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:43:01,984 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 339 [2023-08-29 19:43:01,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:43:04,188 INFO L130 PetriNetUnfolder]: 5972/11823 cut-off events. [2023-08-29 19:43:04,188 INFO L131 PetriNetUnfolder]: For 42852/42852 co-relation queries the response was YES. [2023-08-29 19:43:04,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50920 conditions, 11823 events. 5972/11823 cut-off events. For 42852/42852 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 80704 event pairs, 1888 based on Foata normal form. 64/11887 useless extension candidates. Maximal degree in co-relation 50846. Up to 5949 conditions per place. [2023-08-29 19:43:04,318 INFO L137 encePairwiseOnDemand]: 332/339 looper letters, 247 selfloop transitions, 45 changer transitions 0/293 dead transitions. [2023-08-29 19:43:04,319 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 293 transitions, 3430 flow [2023-08-29 19:43:04,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-29 19:43:04,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-29 19:43:04,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1177 transitions. [2023-08-29 19:43:04,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49599662873999156 [2023-08-29 19:43:04,321 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1177 transitions. [2023-08-29 19:43:04,321 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1177 transitions. [2023-08-29 19:43:04,322 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:43:04,322 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1177 transitions. [2023-08-29 19:43:04,323 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 168.14285714285714) internal successors, (1177), 7 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:04,325 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 339.0) internal successors, (2712), 8 states have internal predecessors, (2712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:04,326 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 339.0) internal successors, (2712), 8 states have internal predecessors, (2712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:04,326 INFO L175 Difference]: Start difference. First operand has 197 places, 202 transitions, 2231 flow. Second operand 7 states and 1177 transitions. [2023-08-29 19:43:04,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 293 transitions, 3430 flow [2023-08-29 19:43:04,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 293 transitions, 3203 flow, removed 112 selfloop flow, removed 2 redundant places. [2023-08-29 19:43:04,674 INFO L231 Difference]: Finished difference. Result has 206 places, 210 transitions, 2332 flow [2023-08-29 19:43:04,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=1984, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2332, PETRI_PLACES=206, PETRI_TRANSITIONS=210} [2023-08-29 19:43:04,675 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 157 predicate places. [2023-08-29 19:43:04,675 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 210 transitions, 2332 flow [2023-08-29 19:43:04,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 157.0) internal successors, (942), 6 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:04,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:43:04,676 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:43:04,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-29 19:43:04,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-08-29 19:43:04,882 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:43:04,883 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:43:04,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1306320960, now seen corresponding path program 1 times [2023-08-29 19:43:04,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:43:04,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819084393] [2023-08-29 19:43:04,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:43:04,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:43:04,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 19:43:04,912 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-29 19:43:04,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 19:43:04,979 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-29 19:43:04,979 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-29 19:43:04,980 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location t2Err2ASSERT_VIOLATIONMEMORY_LEAK (22 of 23 remaining) [2023-08-29 19:43:04,981 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 23 remaining) [2023-08-29 19:43:04,981 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 23 remaining) [2023-08-29 19:43:04,982 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 23 remaining) [2023-08-29 19:43:04,982 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 23 remaining) [2023-08-29 19:43:04,982 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 23 remaining) [2023-08-29 19:43:04,982 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 23 remaining) [2023-08-29 19:43:04,982 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 23 remaining) [2023-08-29 19:43:04,982 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 23 remaining) [2023-08-29 19:43:04,983 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (13 of 23 remaining) [2023-08-29 19:43:04,983 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 23 remaining) [2023-08-29 19:43:04,983 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (11 of 23 remaining) [2023-08-29 19:43:04,983 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 23 remaining) [2023-08-29 19:43:04,983 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 23 remaining) [2023-08-29 19:43:04,983 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err2ASSERT_VIOLATIONMEMORY_LEAK (8 of 23 remaining) [2023-08-29 19:43:04,984 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err2ASSERT_VIOLATIONMEMORY_LEAK (7 of 23 remaining) [2023-08-29 19:43:04,984 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 23 remaining) [2023-08-29 19:43:04,984 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 23 remaining) [2023-08-29 19:43:04,984 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 23 remaining) [2023-08-29 19:43:04,984 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 23 remaining) [2023-08-29 19:43:04,984 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err2ASSERT_VIOLATIONMEMORY_LEAK (2 of 23 remaining) [2023-08-29 19:43:04,985 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 23 remaining) [2023-08-29 19:43:04,986 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 23 remaining) [2023-08-29 19:43:04,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-29 19:43:04,987 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:43:04,992 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-29 19:43:04,992 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-29 19:43:05,041 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.08 07:43:05 BasicIcfg [2023-08-29 19:43:05,041 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-29 19:43:05,042 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-08-29 19:43:05,042 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-08-29 19:43:05,043 INFO L275 PluginConnector]: Witness Printer initialized [2023-08-29 19:43:05,043 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 07:42:27" (3/4) ... [2023-08-29 19:43:05,045 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-08-29 19:43:05,046 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-08-29 19:43:05,046 INFO L158 Benchmark]: Toolchain (without parser) took 38483.70ms. Allocated memory was 73.4MB in the beginning and 1.2GB in the end (delta: 1.1GB). Free memory was 46.0MB in the beginning and 670.4MB in the end (delta: -624.3MB). Peak memory consumption was 496.4MB. Max. memory is 16.1GB. [2023-08-29 19:43:05,046 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 56.6MB. Free memory is still 34.9MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-29 19:43:05,046 INFO L158 Benchmark]: CACSL2BoogieTranslator took 567.83ms. Allocated memory is still 73.4MB. Free memory was 45.8MB in the beginning and 34.8MB in the end (delta: 11.0MB). Peak memory consumption was 14.9MB. Max. memory is 16.1GB. [2023-08-29 19:43:05,047 INFO L158 Benchmark]: Boogie Procedure Inliner took 71.27ms. Allocated memory is still 73.4MB. Free memory was 34.8MB in the beginning and 32.0MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-29 19:43:05,047 INFO L158 Benchmark]: Boogie Preprocessor took 62.27ms. Allocated memory is still 73.4MB. Free memory was 32.0MB in the beginning and 30.2MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-29 19:43:05,047 INFO L158 Benchmark]: RCFGBuilder took 564.42ms. Allocated memory is still 73.4MB. Free memory was 30.2MB in the beginning and 35.2MB in the end (delta: -5.0MB). Peak memory consumption was 7.3MB. Max. memory is 16.1GB. [2023-08-29 19:43:05,048 INFO L158 Benchmark]: TraceAbstraction took 37206.41ms. Allocated memory was 73.4MB in the beginning and 1.2GB in the end (delta: 1.1GB). Free memory was 34.3MB in the beginning and 671.4MB in the end (delta: -637.1MB). Peak memory consumption was 484.7MB. Max. memory is 16.1GB. [2023-08-29 19:43:05,048 INFO L158 Benchmark]: Witness Printer took 4.06ms. Allocated memory is still 1.2GB. Free memory was 671.4MB in the beginning and 670.4MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-29 19:43:05,049 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 56.6MB. Free memory is still 34.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 567.83ms. Allocated memory is still 73.4MB. Free memory was 45.8MB in the beginning and 34.8MB in the end (delta: 11.0MB). Peak memory consumption was 14.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 71.27ms. Allocated memory is still 73.4MB. Free memory was 34.8MB in the beginning and 32.0MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 62.27ms. Allocated memory is still 73.4MB. Free memory was 32.0MB in the beginning and 30.2MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 564.42ms. Allocated memory is still 73.4MB. Free memory was 30.2MB in the beginning and 35.2MB in the end (delta: -5.0MB). Peak memory consumption was 7.3MB. Max. memory is 16.1GB. * TraceAbstraction took 37206.41ms. Allocated memory was 73.4MB in the beginning and 1.2GB in the end (delta: 1.1GB). Free memory was 34.3MB in the beginning and 671.4MB in the end (delta: -637.1MB). Peak memory consumption was 484.7MB. Max. memory is 16.1GB. * Witness Printer took 4.06ms. Allocated memory is still 1.2GB. Free memory was 671.4MB in the beginning and 670.4MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.5s, 165 PlacesBefore, 49 PlacesAfterwards, 168 TransitionsBefore, 47 TransitionsAfterwards, 8718 CoEnabledTransitionPairs, 6 FixpointIterations, 41 TrivialSequentialCompositions, 98 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 21 ConcurrentYvCompositions, 5 ChoiceCompositions, 165 TotalNumberOfCompositions, 13763 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 9423, independent: 9194, independent conditional: 0, independent unconditional: 9194, dependent: 229, dependent conditional: 0, dependent unconditional: 229, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 4965, independent: 4910, independent conditional: 0, independent unconditional: 4910, dependent: 55, dependent conditional: 0, dependent unconditional: 55, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 9423, independent: 4284, independent conditional: 0, independent unconditional: 4284, dependent: 174, dependent conditional: 0, dependent unconditional: 174, unknown: 4965, unknown conditional: 0, unknown unconditional: 4965] , Statistics on independence cache: Total cache size (in pairs): 283, Positive cache size: 262, Positive conditional cache size: 0, Positive unconditional cache size: 262, Negative cache size: 21, Negative conditional cache size: 0, Negative unconditional cache size: 21, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - UnprovableResult [Line: 940]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 940. Possible FailurePath: [L935] 0 static int top=0; [L936] 0 static unsigned int arr[(400)]; [L937] 0 pthread_mutex_t m; [L938] 0 _Bool flag=(0); [L1019] 0 pthread_t id1, id2; [L1021] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arr={3:0}, flag=0, id1={7:0}, id2={5:0}, m={4:0}, pthread_create(&id1, ((void *)0), t1, ((void *)0))=-2, top=0] [L988] 1 int i; [L989] 1 unsigned int tmp; [L990] 1 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L1022] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arr={3:0}, flag=0, id1={7:0}, id2={5:0}, m={4:0}, pthread_create(&id2, ((void *)0), t2, ((void *)0))=-1, top=0] [L990] COND TRUE 1 i<(400) [L993] 1 tmp = __VERIFIER_nondet_uint() [L994] CALL 1 assume_abort_if_not(tmp < (400)) [L1004] 2 int i; [L1005] 2 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L23] COND FALSE 1 !(!cond) [L994] RET 1 assume_abort_if_not(tmp < (400)) [L995] CALL, EXPR 1 push(arr,tmp) [L960] COND FALSE 1 !(top==(400)) [L967] CALL, EXPR 1 get_top() [L952] 1 return top; [L967] RET, EXPR 1 get_top() [L967] 1 stack[get_top()] = x [L968] CALL 1 inc_top() [L944] 1 top++ [L968] RET 1 inc_top() [L970] 1 return 0; [L995] RET, EXPR 1 push(arr,tmp) [L995] COND FALSE 1 !(push(arr,tmp)==(-1)) [L997] 1 flag=(1) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=0, m={4:0}, tmp=399, top=1] [L990] 1 i++ VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, tmp=399, top=1] [L1005] COND TRUE 2 i<(400) [L1008] COND TRUE 2 \read(flag) [L1010] CALL, EXPR 2 pop(arr) [L974] CALL, EXPR 2 get_top() [L952] 2 return top; [L974] RET, EXPR 2 get_top() [L974] COND FALSE 2 !(get_top()==0) [L981] CALL 2 dec_top() [L948] 2 top-- VAL [arr={3:0}, flag=1, m={4:0}, top=0] [L981] RET 2 dec_top() [L982] CALL, EXPR 2 get_top() [L952] 2 return top; VAL [\result=0, \result=0, arr={3:0}, flag=1, m={4:0}, top=0] [L982] RET, EXPR 2 get_top() [L982] EXPR 2 stack[get_top()] [L982] 2 return stack[get_top()]; [L1010] RET, EXPR 2 pop(arr) [L1010] COND FALSE 2 !(!(pop(arr)!=(-2))) [L1005] 2 i++ VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, top=0] [L1005] COND TRUE 2 i<(400) [L1008] COND TRUE 2 \read(flag) [L1010] CALL, EXPR 2 pop(arr) [L974] CALL, EXPR 2 get_top() [L952] 2 return top; [L974] RET, EXPR 2 get_top() [L974] COND TRUE 2 get_top()==0 [L977] 2 return (-2); [L1010] RET, EXPR 2 pop(arr) [L1010] COND TRUE 2 !(pop(arr)!=(-2)) [L1011] CALL 2 error() [L940] 2 reach_error() VAL [arr={3:0}, flag=1, m={4:0}, top=0] - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1017]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1021]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 1022]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 940]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 270 locations, 23 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 37.0s, OverallIterations: 23, TraceHistogramMax: 3, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 24.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.6s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 6544 SdHoareTripleChecker+Valid, 12.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5705 mSDsluCounter, 11123 SdHoareTripleChecker+Invalid, 10.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 10971 mSDsCounter, 207 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 26879 IncrementalHoareTripleChecker+Invalid, 27086 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 207 mSolverCounterUnsat, 152 mSDtfsCounter, 26879 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 388 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 224 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1001 ImplicationChecksByTransitivity, 3.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2332occurred in iteration=22, InterpolantAutomatonStates: 171, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 5.5s InterpolantComputationTime, 453 NumberOfCodeBlocks, 453 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 481 ConstructedInterpolants, 0 QuantifiedInterpolants, 4022 SizeOfPredicates, 28 NumberOfNonLiveVariables, 1222 ConjunctsInSsa, 89 ConjunctsInUnsatCore, 31 InterpolantComputations, 18 PerfectInterpolantSequences, 18/73 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2023-08-29 19:43:05,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/pthread/stack_longer-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4351dece6a672e511bbcb86915e62fc8a7361763ad7ab88f2e640b2d00ea50a7 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 19:43:07,129 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 19:43:07,131 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 19:43:07,156 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 19:43:07,157 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 19:43:07,160 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 19:43:07,162 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 19:43:07,165 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 19:43:07,169 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 19:43:07,174 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 19:43:07,175 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 19:43:07,178 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 19:43:07,178 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 19:43:07,180 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 19:43:07,182 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 19:43:07,185 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 19:43:07,187 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 19:43:07,188 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 19:43:07,190 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 19:43:07,196 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 19:43:07,198 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 19:43:07,199 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 19:43:07,199 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 19:43:07,201 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 19:43:07,208 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 19:43:07,208 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 19:43:07,208 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 19:43:07,210 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 19:43:07,211 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 19:43:07,212 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 19:43:07,212 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 19:43:07,214 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 19:43:07,216 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 19:43:07,217 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 19:43:07,218 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 19:43:07,218 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 19:43:07,218 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 19:43:07,219 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 19:43:07,219 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 19:43:07,229 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 19:43:07,230 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 19:43:07,231 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-29 19:43:07,270 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 19:43:07,271 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 19:43:07,272 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 19:43:07,272 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 19:43:07,273 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 19:43:07,273 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 19:43:07,274 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 19:43:07,274 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 19:43:07,274 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 19:43:07,274 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 19:43:07,275 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 19:43:07,275 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 19:43:07,275 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 19:43:07,276 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 19:43:07,276 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 19:43:07,276 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 19:43:07,276 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 19:43:07,276 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 19:43:07,276 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 19:43:07,277 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 19:43:07,277 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-29 19:43:07,277 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-29 19:43:07,277 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 19:43:07,277 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 19:43:07,278 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 19:43:07,278 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 19:43:07,278 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 19:43:07,278 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 19:43:07,278 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 19:43:07,278 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 19:43:07,279 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-29 19:43:07,279 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-29 19:43:07,279 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 19:43:07,279 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 19:43:07,280 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 19:43:07,280 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-29 19:43:07,280 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 19:43:07,280 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4351dece6a672e511bbcb86915e62fc8a7361763ad7ab88f2e640b2d00ea50a7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 19:43:07,620 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 19:43:07,643 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 19:43:07,645 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 19:43:07,647 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 19:43:07,647 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 19:43:07,648 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/stack_longer-1.i [2023-08-29 19:43:08,856 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 19:43:09,148 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 19:43:09,150 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longer-1.i [2023-08-29 19:43:09,161 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1b3b39f5/aa99c6bbcfec4ef6a20371fee21e9175/FLAG2dfba7aec [2023-08-29 19:43:09,175 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1b3b39f5/aa99c6bbcfec4ef6a20371fee21e9175 [2023-08-29 19:43:09,177 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 19:43:09,178 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 19:43:09,179 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 19:43:09,179 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 19:43:09,182 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 19:43:09,182 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 07:43:09" (1/1) ... [2023-08-29 19:43:09,187 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@156dad8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:43:09, skipping insertion in model container [2023-08-29 19:43:09,187 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 07:43:09" (1/1) ... [2023-08-29 19:43:09,193 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 19:43:09,235 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 19:43:09,551 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/stack_longer-1.i[41527,41540] [2023-08-29 19:43:09,583 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 19:43:09,600 INFO L203 MainTranslator]: Completed pre-run [2023-08-29 19:43:09,652 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/stack_longer-1.i[41527,41540] [2023-08-29 19:43:09,673 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 19:43:09,739 INFO L208 MainTranslator]: Completed translation [2023-08-29 19:43:09,739 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:43:09 WrapperNode [2023-08-29 19:43:09,739 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 19:43:09,740 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-29 19:43:09,740 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-29 19:43:09,741 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-29 19:43:09,746 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:43:09" (1/1) ... [2023-08-29 19:43:09,767 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:43:09" (1/1) ... [2023-08-29 19:43:09,792 INFO L138 Inliner]: procedures = 281, calls = 39, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 152 [2023-08-29 19:43:09,803 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-29 19:43:09,804 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-29 19:43:09,804 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-29 19:43:09,805 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-29 19:43:09,813 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:43:09" (1/1) ... [2023-08-29 19:43:09,814 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:43:09" (1/1) ... [2023-08-29 19:43:09,821 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:43:09" (1/1) ... [2023-08-29 19:43:09,822 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:43:09" (1/1) ... [2023-08-29 19:43:09,834 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:43:09" (1/1) ... [2023-08-29 19:43:09,839 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:43:09" (1/1) ... [2023-08-29 19:43:09,841 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:43:09" (1/1) ... [2023-08-29 19:43:09,845 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:43:09" (1/1) ... [2023-08-29 19:43:09,849 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-29 19:43:09,861 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-29 19:43:09,861 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-29 19:43:09,861 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-29 19:43:09,862 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:43:09" (1/1) ... [2023-08-29 19:43:09,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 19:43:09,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:43:09,902 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-29 19:43:09,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-29 19:43:09,951 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-29 19:43:09,951 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-29 19:43:09,951 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-29 19:43:09,953 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-29 19:43:09,954 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-29 19:43:09,954 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-29 19:43:09,954 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-29 19:43:09,954 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-29 19:43:09,954 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-29 19:43:09,954 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2023-08-29 19:43:09,954 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-29 19:43:09,955 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-29 19:43:09,955 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-29 19:43:09,955 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-29 19:43:09,956 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-29 19:43:10,168 INFO L236 CfgBuilder]: Building ICFG [2023-08-29 19:43:10,186 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-29 19:43:10,504 INFO L277 CfgBuilder]: Performing block encoding [2023-08-29 19:43:10,512 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-29 19:43:10,512 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-29 19:43:10,514 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 07:43:10 BoogieIcfgContainer [2023-08-29 19:43:10,515 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-29 19:43:10,517 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-29 19:43:10,517 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-29 19:43:10,519 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-29 19:43:10,519 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 07:43:09" (1/3) ... [2023-08-29 19:43:10,520 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@775fac18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 07:43:10, skipping insertion in model container [2023-08-29 19:43:10,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:43:09" (2/3) ... [2023-08-29 19:43:10,521 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@775fac18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 07:43:10, skipping insertion in model container [2023-08-29 19:43:10,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 07:43:10" (3/3) ... [2023-08-29 19:43:10,522 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longer-1.i [2023-08-29 19:43:10,538 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-29 19:43:10,539 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2023-08-29 19:43:10,539 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-29 19:43:10,706 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-29 19:43:10,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 167 places, 170 transitions, 356 flow [2023-08-29 19:43:10,881 INFO L130 PetriNetUnfolder]: 10/168 cut-off events. [2023-08-29 19:43:10,882 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 19:43:10,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177 conditions, 168 events. 10/168 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 424 event pairs, 0 based on Foata normal form. 0/143 useless extension candidates. Maximal degree in co-relation 121. Up to 3 conditions per place. [2023-08-29 19:43:10,890 INFO L82 GeneralOperation]: Start removeDead. Operand has 167 places, 170 transitions, 356 flow [2023-08-29 19:43:10,899 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 161 places, 164 transitions, 340 flow [2023-08-29 19:43:10,903 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 19:43:10,928 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 161 places, 164 transitions, 340 flow [2023-08-29 19:43:10,934 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 161 places, 164 transitions, 340 flow [2023-08-29 19:43:10,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 161 places, 164 transitions, 340 flow [2023-08-29 19:43:11,036 INFO L130 PetriNetUnfolder]: 10/164 cut-off events. [2023-08-29 19:43:11,037 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 19:43:11,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173 conditions, 164 events. 10/164 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 420 event pairs, 0 based on Foata normal form. 0/140 useless extension candidates. Maximal degree in co-relation 121. Up to 3 conditions per place. [2023-08-29 19:43:11,047 INFO L119 LiptonReduction]: Number of co-enabled transitions 8060 [2023-08-29 19:43:19,073 INFO L134 LiptonReduction]: Checked pairs total: 12918 [2023-08-29 19:43:19,074 INFO L136 LiptonReduction]: Total number of compositions: 160 [2023-08-29 19:43:19,097 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 19:43:19,102 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;@1411f492, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 19:43:19,102 INFO L358 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2023-08-29 19:43:19,104 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-29 19:43:19,104 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 19:43:19,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:43:19,105 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-29 19:43:19,105 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:43:19,109 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:43:19,110 INFO L85 PathProgramCache]: Analyzing trace with hash 689, now seen corresponding path program 1 times [2023-08-29 19:43:19,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 19:43:19,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1994510976] [2023-08-29 19:43:19,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:43:19,121 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:43:19,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 19:43:19,125 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 19:43:19,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-08-29 19:43:19,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:43:19,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 3 conjuncts, 1 conjunts are in the unsatisfiable core [2023-08-29 19:43:19,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:43:19,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:43:19,213 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 19:43:19,214 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 19:43:19,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1994510976] [2023-08-29 19:43:19,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1994510976] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:43:19,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:43:19,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-29 19:43:19,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324420314] [2023-08-29 19:43:19,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:43:19,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-29 19:43:19,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 19:43:19,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-29 19:43:19,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-29 19:43:19,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 330 [2023-08-29 19:43:19,264 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 47 transitions, 106 flow. Second operand has 2 states, 2 states have (on average 159.5) internal successors, (319), 2 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:19,264 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:43:19,264 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 330 [2023-08-29 19:43:19,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:43:19,636 INFO L130 PetriNetUnfolder]: 1353/2144 cut-off events. [2023-08-29 19:43:19,636 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-29 19:43:19,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4268 conditions, 2144 events. 1353/2144 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 10238 event pairs, 1085 based on Foata normal form. 0/1234 useless extension candidates. Maximal degree in co-relation 4016. Up to 2081 conditions per place. [2023-08-29 19:43:19,666 INFO L137 encePairwiseOnDemand]: 328/330 looper letters, 43 selfloop transitions, 0 changer transitions 0/45 dead transitions. [2023-08-29 19:43:19,666 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 45 transitions, 188 flow [2023-08-29 19:43:19,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-29 19:43:19,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-29 19:43:19,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 363 transitions. [2023-08-29 19:43:19,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2023-08-29 19:43:19,679 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 363 transitions. [2023-08-29 19:43:19,679 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 363 transitions. [2023-08-29 19:43:19,681 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:43:19,682 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 363 transitions. [2023-08-29 19:43:19,686 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 181.5) internal successors, (363), 2 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:19,690 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 330.0) internal successors, (990), 3 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:19,691 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 330.0) internal successors, (990), 3 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:19,693 INFO L175 Difference]: Start difference. First operand has 49 places, 47 transitions, 106 flow. Second operand 2 states and 363 transitions. [2023-08-29 19:43:19,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 45 transitions, 188 flow [2023-08-29 19:43:19,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 45 transitions, 180 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-29 19:43:19,697 INFO L231 Difference]: Finished difference. Result has 44 places, 45 transitions, 94 flow [2023-08-29 19:43:19,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=94, PETRI_PLACES=44, PETRI_TRANSITIONS=45} [2023-08-29 19:43:19,701 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -5 predicate places. [2023-08-29 19:43:19,702 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 45 transitions, 94 flow [2023-08-29 19:43:19,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 159.5) internal successors, (319), 2 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:19,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:43:19,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 19:43:19,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-08-29 19:43:19,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:43:19,911 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:43:19,912 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:43:19,912 INFO L85 PathProgramCache]: Analyzing trace with hash 680063, now seen corresponding path program 1 times [2023-08-29 19:43:19,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 19:43:19,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [169154102] [2023-08-29 19:43:19,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:43:19,914 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:43:19,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 19:43:19,915 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 19:43:19,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-08-29 19:43:19,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:43:19,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-29 19:43:19,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:43:20,038 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-08-29 19:43:20,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 19 [2023-08-29 19:43:20,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:43:20,054 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 19:43:20,055 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 19:43:20,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [169154102] [2023-08-29 19:43:20,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [169154102] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:43:20,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:43:20,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 19:43:20,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044176247] [2023-08-29 19:43:20,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:43:20,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:43:20,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 19:43:20,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:43:20,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:43:20,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 330 [2023-08-29 19:43:20,146 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 45 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 151.0) internal successors, (453), 3 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:20,146 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:43:20,147 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 330 [2023-08-29 19:43:20,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:43:20,376 INFO L130 PetriNetUnfolder]: 1325/2090 cut-off events. [2023-08-29 19:43:20,376 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-29 19:43:20,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4133 conditions, 2090 events. 1325/2090 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 9855 event pairs, 1062 based on Foata normal form. 0/1215 useless extension candidates. Maximal degree in co-relation 4130. Up to 2026 conditions per place. [2023-08-29 19:43:20,386 INFO L137 encePairwiseOnDemand]: 326/330 looper letters, 39 selfloop transitions, 2 changer transitions 0/43 dead transitions. [2023-08-29 19:43:20,386 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 43 transitions, 172 flow [2023-08-29 19:43:20,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:43:20,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:43:20,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 493 transitions. [2023-08-29 19:43:20,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49797979797979797 [2023-08-29 19:43:20,392 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 493 transitions. [2023-08-29 19:43:20,392 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 493 transitions. [2023-08-29 19:43:20,392 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:43:20,392 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 493 transitions. [2023-08-29 19:43:20,395 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 164.33333333333334) internal successors, (493), 3 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:20,398 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 330.0) internal successors, (1320), 4 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:20,399 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 330.0) internal successors, (1320), 4 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:20,399 INFO L175 Difference]: Start difference. First operand has 44 places, 45 transitions, 94 flow. Second operand 3 states and 493 transitions. [2023-08-29 19:43:20,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 43 transitions, 172 flow [2023-08-29 19:43:20,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 43 transitions, 172 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 19:43:20,401 INFO L231 Difference]: Finished difference. Result has 44 places, 43 transitions, 94 flow [2023-08-29 19:43:20,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=44, PETRI_TRANSITIONS=43} [2023-08-29 19:43:20,402 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -5 predicate places. [2023-08-29 19:43:20,402 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 43 transitions, 94 flow [2023-08-29 19:43:20,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 151.0) internal successors, (453), 3 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:20,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:43:20,403 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 19:43:20,417 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2023-08-29 19:43:20,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:43:20,612 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:43:20,612 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:43:20,612 INFO L85 PathProgramCache]: Analyzing trace with hash 680062, now seen corresponding path program 1 times [2023-08-29 19:43:20,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 19:43:20,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1136763738] [2023-08-29 19:43:20,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:43:20,613 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:43:20,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 19:43:20,614 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 19:43:20,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-08-29 19:43:20,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:43:20,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-29 19:43:20,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:43:20,726 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-29 19:43:20,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2023-08-29 19:43:20,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:43:20,749 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 19:43:20,749 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 19:43:20,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1136763738] [2023-08-29 19:43:20,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1136763738] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:43:20,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:43:20,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 19:43:20,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469662226] [2023-08-29 19:43:20,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:43:20,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:43:20,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 19:43:20,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:43:20,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:43:20,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 330 [2023-08-29 19:43:20,854 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 43 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:20,855 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:43:20,855 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 330 [2023-08-29 19:43:20,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:43:21,062 INFO L130 PetriNetUnfolder]: 1297/2036 cut-off events. [2023-08-29 19:43:21,062 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-29 19:43:21,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4029 conditions, 2036 events. 1297/2036 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 9523 event pairs, 1039 based on Foata normal form. 0/1196 useless extension candidates. Maximal degree in co-relation 4025. Up to 1973 conditions per place. [2023-08-29 19:43:21,073 INFO L137 encePairwiseOnDemand]: 326/330 looper letters, 37 selfloop transitions, 2 changer transitions 0/41 dead transitions. [2023-08-29 19:43:21,073 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 41 transitions, 168 flow [2023-08-29 19:43:21,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:43:21,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:43:21,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 503 transitions. [2023-08-29 19:43:21,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5080808080808081 [2023-08-29 19:43:21,076 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 503 transitions. [2023-08-29 19:43:21,076 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 503 transitions. [2023-08-29 19:43:21,076 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:43:21,076 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 503 transitions. [2023-08-29 19:43:21,078 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:21,079 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 330.0) internal successors, (1320), 4 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:21,080 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 330.0) internal successors, (1320), 4 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:21,080 INFO L175 Difference]: Start difference. First operand has 44 places, 43 transitions, 94 flow. Second operand 3 states and 503 transitions. [2023-08-29 19:43:21,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 41 transitions, 168 flow [2023-08-29 19:43:21,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 41 transitions, 164 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:43:21,082 INFO L231 Difference]: Finished difference. Result has 42 places, 41 transitions, 90 flow [2023-08-29 19:43:21,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=42, PETRI_TRANSITIONS=41} [2023-08-29 19:43:21,083 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -7 predicate places. [2023-08-29 19:43:21,083 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 41 transitions, 90 flow [2023-08-29 19:43:21,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:21,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:43:21,084 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 19:43:21,099 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-08-29 19:43:21,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:43:21,293 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:43:21,294 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:43:21,294 INFO L85 PathProgramCache]: Analyzing trace with hash 653554661, now seen corresponding path program 1 times [2023-08-29 19:43:21,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 19:43:21,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [691298573] [2023-08-29 19:43:21,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:43:21,295 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:43:21,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 19:43:21,299 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 19:43:21,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-08-29 19:43:21,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:43:21,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-29 19:43:21,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:43:21,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 19:43:21,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2023-08-29 19:43:21,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-08-29 19:43:21,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:43:21,513 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 19:43:21,513 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 19:43:21,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [691298573] [2023-08-29 19:43:21,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [691298573] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:43:21,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:43:21,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 19:43:21,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958977737] [2023-08-29 19:43:21,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:43:21,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:43:21,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 19:43:21,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:43:21,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:43:21,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 330 [2023-08-29 19:43:21,607 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 41 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:21,607 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:43:21,607 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 330 [2023-08-29 19:43:21,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:43:21,785 INFO L130 PetriNetUnfolder]: 948/1516 cut-off events. [2023-08-29 19:43:21,786 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-29 19:43:21,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3004 conditions, 1516 events. 948/1516 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 6799 event pairs, 752 based on Foata normal form. 0/959 useless extension candidates. Maximal degree in co-relation 3000. Up to 1468 conditions per place. [2023-08-29 19:43:21,793 INFO L137 encePairwiseOnDemand]: 327/330 looper letters, 36 selfloop transitions, 2 changer transitions 0/40 dead transitions. [2023-08-29 19:43:21,793 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 40 transitions, 164 flow [2023-08-29 19:43:21,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:43:21,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:43:21,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 501 transitions. [2023-08-29 19:43:21,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5060606060606061 [2023-08-29 19:43:21,795 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 501 transitions. [2023-08-29 19:43:21,795 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 501 transitions. [2023-08-29 19:43:21,796 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:43:21,796 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 501 transitions. [2023-08-29 19:43:21,797 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 167.0) internal successors, (501), 3 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:21,799 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 330.0) internal successors, (1320), 4 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:21,799 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 330.0) internal successors, (1320), 4 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:21,799 INFO L175 Difference]: Start difference. First operand has 42 places, 41 transitions, 90 flow. Second operand 3 states and 501 transitions. [2023-08-29 19:43:21,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 40 transitions, 164 flow [2023-08-29 19:43:21,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 40 transitions, 160 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:43:21,801 INFO L231 Difference]: Finished difference. Result has 41 places, 40 transitions, 88 flow [2023-08-29 19:43:21,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=41, PETRI_TRANSITIONS=40} [2023-08-29 19:43:21,802 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -8 predicate places. [2023-08-29 19:43:21,802 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 40 transitions, 88 flow [2023-08-29 19:43:21,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:21,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:43:21,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 19:43:21,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-08-29 19:43:22,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:43:22,012 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:43:22,012 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:43:22,012 INFO L85 PathProgramCache]: Analyzing trace with hash 653554660, now seen corresponding path program 1 times [2023-08-29 19:43:22,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 19:43:22,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1387152021] [2023-08-29 19:43:22,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:43:22,013 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:43:22,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 19:43:22,014 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 19:43:22,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-08-29 19:43:22,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:43:22,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-29 19:43:22,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:43:22,124 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-29 19:43:22,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 22 [2023-08-29 19:43:22,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:43:22,140 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 19:43:22,141 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 19:43:22,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1387152021] [2023-08-29 19:43:22,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1387152021] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:43:22,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:43:22,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 19:43:22,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778229077] [2023-08-29 19:43:22,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:43:22,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:43:22,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 19:43:22,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:43:22,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:43:22,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 330 [2023-08-29 19:43:22,210 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 40 transitions, 88 flow. Second operand has 3 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:22,210 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:43:22,210 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 330 [2023-08-29 19:43:22,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:43:22,349 INFO L130 PetriNetUnfolder]: 599/996 cut-off events. [2023-08-29 19:43:22,349 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-29 19:43:22,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1979 conditions, 996 events. 599/996 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 4257 event pairs, 465 based on Foata normal form. 0/722 useless extension candidates. Maximal degree in co-relation 1975. Up to 963 conditions per place. [2023-08-29 19:43:22,354 INFO L137 encePairwiseOnDemand]: 327/330 looper letters, 35 selfloop transitions, 2 changer transitions 0/39 dead transitions. [2023-08-29 19:43:22,354 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 39 transitions, 160 flow [2023-08-29 19:43:22,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:43:22,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:43:22,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 488 transitions. [2023-08-29 19:43:22,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49292929292929294 [2023-08-29 19:43:22,356 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 488 transitions. [2023-08-29 19:43:22,356 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 488 transitions. [2023-08-29 19:43:22,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:43:22,357 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 488 transitions. [2023-08-29 19:43:22,358 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 162.66666666666666) internal successors, (488), 3 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:22,360 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 330.0) internal successors, (1320), 4 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:22,360 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 330.0) internal successors, (1320), 4 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:22,361 INFO L175 Difference]: Start difference. First operand has 41 places, 40 transitions, 88 flow. Second operand 3 states and 488 transitions. [2023-08-29 19:43:22,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 39 transitions, 160 flow [2023-08-29 19:43:22,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 39 transitions, 156 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:43:22,362 INFO L231 Difference]: Finished difference. Result has 40 places, 39 transitions, 86 flow [2023-08-29 19:43:22,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=40, PETRI_TRANSITIONS=39} [2023-08-29 19:43:22,363 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -9 predicate places. [2023-08-29 19:43:22,363 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 39 transitions, 86 flow [2023-08-29 19:43:22,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:22,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:43:22,363 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 19:43:22,372 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2023-08-29 19:43:22,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:43:22,572 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:43:22,573 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:43:22,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1215172952, now seen corresponding path program 1 times [2023-08-29 19:43:22,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 19:43:22,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1373615504] [2023-08-29 19:43:22,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:43:22,573 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:43:22,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 19:43:22,574 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 19:43:22,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-08-29 19:43:22,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:43:22,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-29 19:43:22,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:43:22,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:43:22,658 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 19:43:22,658 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 19:43:22,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1373615504] [2023-08-29 19:43:22,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1373615504] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:43:22,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:43:22,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:43:22,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064129165] [2023-08-29 19:43:22,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:43:22,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:43:22,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 19:43:22,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:43:22,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:43:22,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 330 [2023-08-29 19:43:22,679 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 39 transitions, 86 flow. Second operand 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) [2023-08-29 19:43:22,680 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:43:22,680 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 330 [2023-08-29 19:43:22,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:43:22,892 INFO L130 PetriNetUnfolder]: 997/1662 cut-off events. [2023-08-29 19:43:22,892 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2023-08-29 19:43:22,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3296 conditions, 1662 events. 997/1662 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 7578 event pairs, 282 based on Foata normal form. 0/1234 useless extension candidates. Maximal degree in co-relation 3292. Up to 974 conditions per place. [2023-08-29 19:43:22,900 INFO L137 encePairwiseOnDemand]: 325/330 looper letters, 63 selfloop transitions, 4 changer transitions 0/69 dead transitions. [2023-08-29 19:43:22,901 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 69 transitions, 285 flow [2023-08-29 19:43:22,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:43:22,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:43:22,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 533 transitions. [2023-08-29 19:43:22,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5383838383838384 [2023-08-29 19:43:22,903 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 533 transitions. [2023-08-29 19:43:22,903 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 533 transitions. [2023-08-29 19:43:22,904 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:43:22,904 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 533 transitions. [2023-08-29 19:43:22,905 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 177.66666666666666) internal successors, (533), 3 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:22,907 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 330.0) internal successors, (1320), 4 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:22,907 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 330.0) internal successors, (1320), 4 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:22,908 INFO L175 Difference]: Start difference. First operand has 40 places, 39 transitions, 86 flow. Second operand 3 states and 533 transitions. [2023-08-29 19:43:22,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 69 transitions, 285 flow [2023-08-29 19:43:22,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 69 transitions, 279 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:43:22,909 INFO L231 Difference]: Finished difference. Result has 42 places, 42 transitions, 112 flow [2023-08-29 19:43:22,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=42, PETRI_TRANSITIONS=42} [2023-08-29 19:43:22,910 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -7 predicate places. [2023-08-29 19:43:22,911 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 42 transitions, 112 flow [2023-08-29 19:43:22,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has 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) [2023-08-29 19:43:22,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:43:22,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 19:43:22,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-08-29 19:43:23,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:43:23,120 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:43:23,121 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:43:23,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1215174221, now seen corresponding path program 1 times [2023-08-29 19:43:23,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 19:43:23,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [248022576] [2023-08-29 19:43:23,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:43:23,122 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:43:23,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 19:43:23,124 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 19:43:23,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-08-29 19:43:23,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:43:23,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-29 19:43:23,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:43:23,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 19:43:23,267 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2023-08-29 19:43:23,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 27 [2023-08-29 19:43:23,284 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-29 19:43:23,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-29 19:43:23,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:43:23,519 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 19:43:23,519 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 19:43:23,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [248022576] [2023-08-29 19:43:23,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [248022576] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:43:23,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:43:23,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 19:43:23,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803414222] [2023-08-29 19:43:23,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:43:23,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 19:43:23,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 19:43:23,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 19:43:23,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-29 19:43:24,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 330 [2023-08-29 19:43:24,072 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 42 transitions, 112 flow. Second operand has 5 states, 5 states have (on average 153.2) internal successors, (766), 5 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:24,072 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:43:24,072 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 330 [2023-08-29 19:43:24,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:43:24,714 INFO L130 PetriNetUnfolder]: 1236/2073 cut-off events. [2023-08-29 19:43:24,714 INFO L131 PetriNetUnfolder]: For 322/322 co-relation queries the response was YES. [2023-08-29 19:43:24,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4425 conditions, 2073 events. 1236/2073 cut-off events. For 322/322 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 9769 event pairs, 234 based on Foata normal form. 0/1665 useless extension candidates. Maximal degree in co-relation 4420. Up to 1558 conditions per place. [2023-08-29 19:43:24,722 INFO L137 encePairwiseOnDemand]: 324/330 looper letters, 87 selfloop transitions, 7 changer transitions 0/96 dead transitions. [2023-08-29 19:43:24,722 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 96 transitions, 435 flow [2023-08-29 19:43:24,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 19:43:24,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 19:43:24,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 852 transitions. [2023-08-29 19:43:24,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5163636363636364 [2023-08-29 19:43:24,725 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 852 transitions. [2023-08-29 19:43:24,726 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 852 transitions. [2023-08-29 19:43:24,726 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:43:24,726 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 852 transitions. [2023-08-29 19:43:24,728 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 170.4) internal successors, (852), 5 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:24,731 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 330.0) internal successors, (1980), 6 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:24,731 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 330.0) internal successors, (1980), 6 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:24,731 INFO L175 Difference]: Start difference. First operand has 42 places, 42 transitions, 112 flow. Second operand 5 states and 852 transitions. [2023-08-29 19:43:24,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 96 transitions, 435 flow [2023-08-29 19:43:24,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 96 transitions, 419 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:43:24,734 INFO L231 Difference]: Finished difference. Result has 47 places, 48 transitions, 157 flow [2023-08-29 19:43:24,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=157, PETRI_PLACES=47, PETRI_TRANSITIONS=48} [2023-08-29 19:43:24,735 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -2 predicate places. [2023-08-29 19:43:24,735 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 48 transitions, 157 flow [2023-08-29 19:43:24,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 153.2) internal successors, (766), 5 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:24,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:43:24,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 19:43:24,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-08-29 19:43:24,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:43:24,945 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:43:24,946 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:43:24,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1215174222, now seen corresponding path program 1 times [2023-08-29 19:43:24,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 19:43:24,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [577756137] [2023-08-29 19:43:24,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:43:24,946 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:43:24,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 19:43:24,947 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 19:43:24,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-08-29 19:43:25,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:43:25,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-29 19:43:25,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:43:25,058 INFO L321 Elim1Store]: treesize reduction 56, result has 25.3 percent of original size [2023-08-29 19:43:25,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 34 [2023-08-29 19:43:25,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:43:25,185 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 19:43:25,185 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 19:43:25,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [577756137] [2023-08-29 19:43:25,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [577756137] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:43:25,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:43:25,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 19:43:25,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619361122] [2023-08-29 19:43:25,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:43:25,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 19:43:25,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 19:43:25,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 19:43:25,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-29 19:43:25,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 330 [2023-08-29 19:43:25,541 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 48 transitions, 157 flow. Second operand has 5 states, 5 states have (on average 153.2) internal successors, (766), 5 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:25,541 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:43:25,541 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 330 [2023-08-29 19:43:25,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:43:26,030 INFO L130 PetriNetUnfolder]: 1316/2209 cut-off events. [2023-08-29 19:43:26,030 INFO L131 PetriNetUnfolder]: For 458/458 co-relation queries the response was YES. [2023-08-29 19:43:26,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4976 conditions, 2209 events. 1316/2209 cut-off events. For 458/458 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 10820 event pairs, 380 based on Foata normal form. 0/1953 useless extension candidates. Maximal degree in co-relation 4968. Up to 1354 conditions per place. [2023-08-29 19:43:26,040 INFO L137 encePairwiseOnDemand]: 324/330 looper letters, 82 selfloop transitions, 9 changer transitions 0/93 dead transitions. [2023-08-29 19:43:26,041 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 93 transitions, 455 flow [2023-08-29 19:43:26,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 19:43:26,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 19:43:26,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 839 transitions. [2023-08-29 19:43:26,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5084848484848485 [2023-08-29 19:43:26,044 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 839 transitions. [2023-08-29 19:43:26,044 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 839 transitions. [2023-08-29 19:43:26,045 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:43:26,045 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 839 transitions. [2023-08-29 19:43:26,047 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 167.8) internal successors, (839), 5 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:26,051 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 330.0) internal successors, (1980), 6 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:26,051 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 330.0) internal successors, (1980), 6 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:26,052 INFO L175 Difference]: Start difference. First operand has 47 places, 48 transitions, 157 flow. Second operand 5 states and 839 transitions. [2023-08-29 19:43:26,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 93 transitions, 455 flow [2023-08-29 19:43:26,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 93 transitions, 455 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 19:43:26,058 INFO L231 Difference]: Finished difference. Result has 50 places, 49 transitions, 179 flow [2023-08-29 19:43:26,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=179, PETRI_PLACES=50, PETRI_TRANSITIONS=49} [2023-08-29 19:43:26,060 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 1 predicate places. [2023-08-29 19:43:26,061 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 49 transitions, 179 flow [2023-08-29 19:43:26,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 153.2) internal successors, (766), 5 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:26,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:43:26,061 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:43:26,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-08-29 19:43:26,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:43:26,271 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:43:26,272 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:43:26,272 INFO L85 PathProgramCache]: Analyzing trace with hash -293150869, now seen corresponding path program 1 times [2023-08-29 19:43:26,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 19:43:26,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1893158762] [2023-08-29 19:43:26,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:43:26,275 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:43:26,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 19:43:26,276 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 19:43:26,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-08-29 19:43:26,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:43:26,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-29 19:43:26,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:43:26,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:43:26,350 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 19:43:26,350 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 19:43:26,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1893158762] [2023-08-29 19:43:26,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1893158762] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:43:26,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:43:26,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:43:26,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446818641] [2023-08-29 19:43:26,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:43:26,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:43:26,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 19:43:26,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:43:26,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:43:26,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 330 [2023-08-29 19:43:26,357 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 49 transitions, 179 flow. Second operand has 3 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:26,357 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:43:26,357 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 330 [2023-08-29 19:43:26,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:43:26,614 INFO L130 PetriNetUnfolder]: 1272/2113 cut-off events. [2023-08-29 19:43:26,614 INFO L131 PetriNetUnfolder]: For 766/766 co-relation queries the response was YES. [2023-08-29 19:43:26,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4937 conditions, 2113 events. 1272/2113 cut-off events. For 766/766 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 9951 event pairs, 578 based on Foata normal form. 0/1809 useless extension candidates. Maximal degree in co-relation 4928. Up to 1371 conditions per place. [2023-08-29 19:43:26,632 INFO L137 encePairwiseOnDemand]: 326/330 looper letters, 65 selfloop transitions, 3 changer transitions 0/69 dead transitions. [2023-08-29 19:43:26,632 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 69 transitions, 361 flow [2023-08-29 19:43:26,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:43:26,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:43:26,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 526 transitions. [2023-08-29 19:43:26,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5313131313131313 [2023-08-29 19:43:26,634 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 526 transitions. [2023-08-29 19:43:26,634 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 526 transitions. [2023-08-29 19:43:26,635 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:43:26,635 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 526 transitions. [2023-08-29 19:43:26,636 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 175.33333333333334) internal successors, (526), 3 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:26,637 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 330.0) internal successors, (1320), 4 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:26,638 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 330.0) internal successors, (1320), 4 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:26,638 INFO L175 Difference]: Start difference. First operand has 50 places, 49 transitions, 179 flow. Second operand 3 states and 526 transitions. [2023-08-29 19:43:26,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 69 transitions, 361 flow [2023-08-29 19:43:26,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 69 transitions, 337 flow, removed 3 selfloop flow, removed 5 redundant places. [2023-08-29 19:43:26,642 INFO L231 Difference]: Finished difference. Result has 49 places, 47 transitions, 156 flow [2023-08-29 19:43:26,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=49, PETRI_TRANSITIONS=47} [2023-08-29 19:43:26,643 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 0 predicate places. [2023-08-29 19:43:26,643 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 47 transitions, 156 flow [2023-08-29 19:43:26,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:26,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:43:26,644 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:43:26,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-08-29 19:43:26,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:43:26,853 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:43:26,854 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:43:26,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1674813696, now seen corresponding path program 1 times [2023-08-29 19:43:26,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 19:43:26,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1071550905] [2023-08-29 19:43:26,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:43:26,854 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:43:26,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 19:43:26,855 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 19:43:26,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-08-29 19:43:26,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:43:26,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-29 19:43:26,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:43:26,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:43:26,932 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 19:43:26,932 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 19:43:26,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1071550905] [2023-08-29 19:43:26,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1071550905] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:43:26,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:43:26,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:43:26,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029403640] [2023-08-29 19:43:26,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:43:26,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:43:26,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 19:43:26,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:43:26,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:43:26,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 330 [2023-08-29 19:43:26,942 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 47 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:26,942 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:43:26,942 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 330 [2023-08-29 19:43:26,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:43:27,192 INFO L130 PetriNetUnfolder]: 1263/2135 cut-off events. [2023-08-29 19:43:27,193 INFO L131 PetriNetUnfolder]: For 495/495 co-relation queries the response was YES. [2023-08-29 19:43:27,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5006 conditions, 2135 events. 1263/2135 cut-off events. For 495/495 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10508 event pairs, 893 based on Foata normal form. 62/1983 useless extension candidates. Maximal degree in co-relation 4998. Up to 1875 conditions per place. [2023-08-29 19:43:27,203 INFO L137 encePairwiseOnDemand]: 327/330 looper letters, 61 selfloop transitions, 5 changer transitions 0/69 dead transitions. [2023-08-29 19:43:27,203 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 69 transitions, 349 flow [2023-08-29 19:43:27,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:43:27,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:43:27,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 521 transitions. [2023-08-29 19:43:27,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5262626262626262 [2023-08-29 19:43:27,206 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 521 transitions. [2023-08-29 19:43:27,206 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 521 transitions. [2023-08-29 19:43:27,206 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:43:27,206 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 521 transitions. [2023-08-29 19:43:27,207 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:27,209 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 330.0) internal successors, (1320), 4 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:27,209 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 330.0) internal successors, (1320), 4 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:27,210 INFO L175 Difference]: Start difference. First operand has 49 places, 47 transitions, 156 flow. Second operand 3 states and 521 transitions. [2023-08-29 19:43:27,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 69 transitions, 349 flow [2023-08-29 19:43:27,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 69 transitions, 341 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:43:27,213 INFO L231 Difference]: Finished difference. Result has 50 places, 49 transitions, 179 flow [2023-08-29 19:43:27,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=179, PETRI_PLACES=50, PETRI_TRANSITIONS=49} [2023-08-29 19:43:27,215 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 1 predicate places. [2023-08-29 19:43:27,215 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 49 transitions, 179 flow [2023-08-29 19:43:27,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:27,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:43:27,215 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:43:27,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-08-29 19:43:27,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:43:27,424 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:43:27,424 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:43:27,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1538942634, now seen corresponding path program 1 times [2023-08-29 19:43:27,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 19:43:27,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [55660393] [2023-08-29 19:43:27,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:43:27,425 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:43:27,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 19:43:27,426 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 19:43:27,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-08-29 19:43:27,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:43:27,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-29 19:43:27,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:43:27,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:43:27,508 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 19:43:27,509 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 19:43:27,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [55660393] [2023-08-29 19:43:27,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [55660393] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:43:27,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:43:27,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 19:43:27,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674832133] [2023-08-29 19:43:27,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:43:27,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:43:27,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 19:43:27,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:43:27,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:43:27,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 330 [2023-08-29 19:43:27,519 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 49 transitions, 179 flow. Second operand has 3 states, 3 states have (on average 159.33333333333334) internal successors, (478), 3 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:27,519 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:43:27,519 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 330 [2023-08-29 19:43:27,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:43:27,775 INFO L130 PetriNetUnfolder]: 1329/2262 cut-off events. [2023-08-29 19:43:27,776 INFO L131 PetriNetUnfolder]: For 883/883 co-relation queries the response was YES. [2023-08-29 19:43:27,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5518 conditions, 2262 events. 1329/2262 cut-off events. For 883/883 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11997 event pairs, 623 based on Foata normal form. 10/2040 useless extension candidates. Maximal degree in co-relation 5509. Up to 1915 conditions per place. [2023-08-29 19:43:27,786 INFO L137 encePairwiseOnDemand]: 327/330 looper letters, 67 selfloop transitions, 2 changer transitions 0/72 dead transitions. [2023-08-29 19:43:27,786 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 72 transitions, 378 flow [2023-08-29 19:43:27,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:43:27,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:43:27,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 527 transitions. [2023-08-29 19:43:27,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5323232323232323 [2023-08-29 19:43:27,789 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 527 transitions. [2023-08-29 19:43:27,789 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 527 transitions. [2023-08-29 19:43:27,789 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:43:27,789 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 527 transitions. [2023-08-29 19:43:27,790 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 175.66666666666666) internal successors, (527), 3 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:27,792 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 330.0) internal successors, (1320), 4 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:27,792 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 330.0) internal successors, (1320), 4 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:27,792 INFO L175 Difference]: Start difference. First operand has 50 places, 49 transitions, 179 flow. Second operand 3 states and 527 transitions. [2023-08-29 19:43:27,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 72 transitions, 378 flow [2023-08-29 19:43:27,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 72 transitions, 372 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 19:43:27,799 INFO L231 Difference]: Finished difference. Result has 52 places, 49 transitions, 183 flow [2023-08-29 19:43:27,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=183, PETRI_PLACES=52, PETRI_TRANSITIONS=49} [2023-08-29 19:43:27,800 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 3 predicate places. [2023-08-29 19:43:27,800 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 49 transitions, 183 flow [2023-08-29 19:43:27,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 159.33333333333334) internal successors, (478), 3 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:27,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:43:27,801 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:43:27,810 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-08-29 19:43:28,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:43:28,010 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:43:28,010 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:43:28,010 INFO L85 PathProgramCache]: Analyzing trace with hash 583147771, now seen corresponding path program 1 times [2023-08-29 19:43:28,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 19:43:28,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1020655704] [2023-08-29 19:43:28,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:43:28,011 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:43:28,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 19:43:28,012 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 19:43:28,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-08-29 19:43:28,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:43:28,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-29 19:43:28,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:43:28,122 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:43:28,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 19:43:28,161 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:43:28,162 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 19:43:28,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1020655704] [2023-08-29 19:43:28,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1020655704] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 19:43:28,162 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 19:43:28,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2023-08-29 19:43:28,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603929104] [2023-08-29 19:43:28,162 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 19:43:28,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-29 19:43:28,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 19:43:28,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-29 19:43:28,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-08-29 19:43:28,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 330 [2023-08-29 19:43:28,207 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 49 transitions, 183 flow. Second operand has 8 states, 8 states have (on average 154.375) internal successors, (1235), 8 states have internal predecessors, (1235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:28,207 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:43:28,207 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 330 [2023-08-29 19:43:28,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:43:29,321 INFO L130 PetriNetUnfolder]: 3502/5819 cut-off events. [2023-08-29 19:43:29,321 INFO L131 PetriNetUnfolder]: For 1898/1898 co-relation queries the response was YES. [2023-08-29 19:43:29,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14451 conditions, 5819 events. 3502/5819 cut-off events. For 1898/1898 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 32127 event pairs, 512 based on Foata normal form. 96/5291 useless extension candidates. Maximal degree in co-relation 14441. Up to 1238 conditions per place. [2023-08-29 19:43:29,349 INFO L137 encePairwiseOnDemand]: 323/330 looper letters, 258 selfloop transitions, 32 changer transitions 0/292 dead transitions. [2023-08-29 19:43:29,350 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 292 transitions, 1452 flow [2023-08-29 19:43:29,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-29 19:43:29,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-29 19:43:29,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2242 transitions. [2023-08-29 19:43:29,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5226107226107226 [2023-08-29 19:43:29,358 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2242 transitions. [2023-08-29 19:43:29,358 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2242 transitions. [2023-08-29 19:43:29,359 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:43:29,360 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2242 transitions. [2023-08-29 19:43:29,364 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 172.46153846153845) internal successors, (2242), 13 states have internal predecessors, (2242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:29,371 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 330.0) internal successors, (4620), 14 states have internal predecessors, (4620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:29,372 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 330.0) internal successors, (4620), 14 states have internal predecessors, (4620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:29,373 INFO L175 Difference]: Start difference. First operand has 52 places, 49 transitions, 183 flow. Second operand 13 states and 2242 transitions. [2023-08-29 19:43:29,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 292 transitions, 1452 flow [2023-08-29 19:43:29,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 292 transitions, 1448 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 19:43:29,384 INFO L231 Difference]: Finished difference. Result has 67 places, 79 transitions, 428 flow [2023-08-29 19:43:29,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=428, PETRI_PLACES=67, PETRI_TRANSITIONS=79} [2023-08-29 19:43:29,385 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 18 predicate places. [2023-08-29 19:43:29,385 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 79 transitions, 428 flow [2023-08-29 19:43:29,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 154.375) internal successors, (1235), 8 states have internal predecessors, (1235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:29,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:43:29,386 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:43:29,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-08-29 19:43:29,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:43:29,596 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:43:29,597 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:43:29,597 INFO L85 PathProgramCache]: Analyzing trace with hash 583146502, now seen corresponding path program 1 times [2023-08-29 19:43:29,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 19:43:29,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1348724049] [2023-08-29 19:43:29,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:43:29,598 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:43:29,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 19:43:29,599 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 19:43:29,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-08-29 19:43:29,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:43:29,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-29 19:43:29,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:43:29,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 19:43:29,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 19:43:29,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 19:43:29,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2023-08-29 19:43:29,915 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:43:29,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 19:43:30,309 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:43:30,309 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 19:43:30,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1348724049] [2023-08-29 19:43:30,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1348724049] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 19:43:30,309 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 19:43:30,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-29 19:43:30,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590599283] [2023-08-29 19:43:30,310 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 19:43:30,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-29 19:43:30,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 19:43:30,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-29 19:43:30,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2023-08-29 19:43:33,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 330 [2023-08-29 19:43:33,477 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 79 transitions, 428 flow. Second operand has 12 states, 12 states have (on average 148.33333333333334) internal successors, (1780), 12 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:33,477 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:43:33,477 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 330 [2023-08-29 19:43:33,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:43:36,638 INFO L130 PetriNetUnfolder]: 5099/8513 cut-off events. [2023-08-29 19:43:36,638 INFO L131 PetriNetUnfolder]: For 6582/6582 co-relation queries the response was YES. [2023-08-29 19:43:36,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22986 conditions, 8513 events. 5099/8513 cut-off events. For 6582/6582 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 50990 event pairs, 1445 based on Foata normal form. 84/7711 useless extension candidates. Maximal degree in co-relation 22973. Up to 5427 conditions per place. [2023-08-29 19:43:36,690 INFO L137 encePairwiseOnDemand]: 323/330 looper letters, 240 selfloop transitions, 28 changer transitions 0/270 dead transitions. [2023-08-29 19:43:36,690 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 270 transitions, 1582 flow [2023-08-29 19:43:36,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-29 19:43:36,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-29 19:43:36,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2262 transitions. [2023-08-29 19:43:36,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4896103896103896 [2023-08-29 19:43:36,698 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2262 transitions. [2023-08-29 19:43:36,699 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2262 transitions. [2023-08-29 19:43:36,700 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:43:36,700 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2262 transitions. [2023-08-29 19:43:36,704 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 161.57142857142858) internal successors, (2262), 14 states have internal predecessors, (2262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:36,710 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 330.0) internal successors, (4950), 15 states have internal predecessors, (4950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:36,712 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 330.0) internal successors, (4950), 15 states have internal predecessors, (4950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:36,712 INFO L175 Difference]: Start difference. First operand has 67 places, 79 transitions, 428 flow. Second operand 14 states and 2262 transitions. [2023-08-29 19:43:36,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 270 transitions, 1582 flow [2023-08-29 19:43:36,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 270 transitions, 1522 flow, removed 30 selfloop flow, removed 0 redundant places. [2023-08-29 19:43:36,744 INFO L231 Difference]: Finished difference. Result has 85 places, 103 transitions, 658 flow [2023-08-29 19:43:36,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=392, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=658, PETRI_PLACES=85, PETRI_TRANSITIONS=103} [2023-08-29 19:43:36,745 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 36 predicate places. [2023-08-29 19:43:36,746 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 103 transitions, 658 flow [2023-08-29 19:43:36,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 148.33333333333334) internal successors, (1780), 12 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:36,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:43:36,747 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:43:36,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-08-29 19:43:36,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:43:36,956 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:43:36,956 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:43:36,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1940254627, now seen corresponding path program 1 times [2023-08-29 19:43:36,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 19:43:36,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [66798110] [2023-08-29 19:43:36,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:43:36,957 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:43:36,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 19:43:36,959 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 19:43:36,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-08-29 19:43:37,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:43:37,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-29 19:43:37,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:43:37,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2023-08-29 19:43:37,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:43:37,058 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 19:43:37,058 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 19:43:37,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [66798110] [2023-08-29 19:43:37,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [66798110] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:43:37,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:43:37,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 19:43:37,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97766695] [2023-08-29 19:43:37,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:43:37,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:43:37,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 19:43:37,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:43:37,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:43:37,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 330 [2023-08-29 19:43:37,074 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 103 transitions, 658 flow. Second operand has 3 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:37,075 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:43:37,075 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 330 [2023-08-29 19:43:37,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:43:37,371 INFO L130 PetriNetUnfolder]: 1277/2496 cut-off events. [2023-08-29 19:43:37,371 INFO L131 PetriNetUnfolder]: For 2072/2072 co-relation queries the response was YES. [2023-08-29 19:43:37,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6874 conditions, 2496 events. 1277/2496 cut-off events. For 2072/2072 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 13334 event pairs, 235 based on Foata normal form. 102/2468 useless extension candidates. Maximal degree in co-relation 6855. Up to 1764 conditions per place. [2023-08-29 19:43:37,388 INFO L137 encePairwiseOnDemand]: 325/330 looper letters, 66 selfloop transitions, 9 changer transitions 0/83 dead transitions. [2023-08-29 19:43:37,388 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 83 transitions, 612 flow [2023-08-29 19:43:37,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:43:37,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:43:37,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 506 transitions. [2023-08-29 19:43:37,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5111111111111111 [2023-08-29 19:43:37,391 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 506 transitions. [2023-08-29 19:43:37,391 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 506 transitions. [2023-08-29 19:43:37,391 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:43:37,391 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 506 transitions. [2023-08-29 19:43:37,392 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 168.66666666666666) internal successors, (506), 3 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:37,394 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 330.0) internal successors, (1320), 4 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:37,407 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 330.0) internal successors, (1320), 4 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:37,407 INFO L175 Difference]: Start difference. First operand has 85 places, 103 transitions, 658 flow. Second operand 3 states and 506 transitions. [2023-08-29 19:43:37,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 83 transitions, 612 flow [2023-08-29 19:43:37,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 83 transitions, 588 flow, removed 8 selfloop flow, removed 4 redundant places. [2023-08-29 19:43:37,418 INFO L231 Difference]: Finished difference. Result has 78 places, 74 transitions, 432 flow [2023-08-29 19:43:37,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=414, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=432, PETRI_PLACES=78, PETRI_TRANSITIONS=74} [2023-08-29 19:43:37,419 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 29 predicate places. [2023-08-29 19:43:37,419 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 74 transitions, 432 flow [2023-08-29 19:43:37,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:37,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:43:37,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:43:37,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-08-29 19:43:37,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:43:37,629 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:43:37,630 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:43:37,630 INFO L85 PathProgramCache]: Analyzing trace with hash 649205973, now seen corresponding path program 1 times [2023-08-29 19:43:37,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 19:43:37,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [216159296] [2023-08-29 19:43:37,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:43:37,630 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:43:37,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 19:43:37,632 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 19:43:37,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-08-29 19:43:37,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:43:37,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-29 19:43:37,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:43:37,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:43:37,804 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 19:43:37,804 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 19:43:37,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [216159296] [2023-08-29 19:43:37,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [216159296] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:43:37,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:43:37,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-29 19:43:37,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201241773] [2023-08-29 19:43:37,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:43:37,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 19:43:37,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 19:43:37,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 19:43:37,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-08-29 19:43:38,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 330 [2023-08-29 19:43:38,125 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 74 transitions, 432 flow. Second operand has 7 states, 7 states have (on average 149.71428571428572) internal successors, (1048), 7 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:38,125 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:43:38,125 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 330 [2023-08-29 19:43:38,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:43:38,566 INFO L130 PetriNetUnfolder]: 1601/3102 cut-off events. [2023-08-29 19:43:38,566 INFO L131 PetriNetUnfolder]: For 2095/2095 co-relation queries the response was YES. [2023-08-29 19:43:38,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8769 conditions, 3102 events. 1601/3102 cut-off events. For 2095/2095 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 16912 event pairs, 301 based on Foata normal form. 0/3091 useless extension candidates. Maximal degree in co-relation 8750. Up to 1380 conditions per place. [2023-08-29 19:43:38,583 INFO L137 encePairwiseOnDemand]: 321/330 looper letters, 88 selfloop transitions, 28 changer transitions 0/124 dead transitions. [2023-08-29 19:43:38,583 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 124 transitions, 885 flow [2023-08-29 19:43:38,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-29 19:43:38,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-29 19:43:38,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1400 transitions. [2023-08-29 19:43:38,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4713804713804714 [2023-08-29 19:43:38,587 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1400 transitions. [2023-08-29 19:43:38,587 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1400 transitions. [2023-08-29 19:43:38,588 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:43:38,588 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1400 transitions. [2023-08-29 19:43:38,590 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 155.55555555555554) internal successors, (1400), 9 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:38,594 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 330.0) internal successors, (3300), 10 states have internal predecessors, (3300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:38,595 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 330.0) internal successors, (3300), 10 states have internal predecessors, (3300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:38,595 INFO L175 Difference]: Start difference. First operand has 78 places, 74 transitions, 432 flow. Second operand 9 states and 1400 transitions. [2023-08-29 19:43:38,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 124 transitions, 885 flow [2023-08-29 19:43:38,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 124 transitions, 869 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 19:43:38,607 INFO L231 Difference]: Finished difference. Result has 86 places, 87 transitions, 594 flow [2023-08-29 19:43:38,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=421, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=594, PETRI_PLACES=86, PETRI_TRANSITIONS=87} [2023-08-29 19:43:38,607 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 37 predicate places. [2023-08-29 19:43:38,608 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 87 transitions, 594 flow [2023-08-29 19:43:38,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 149.71428571428572) internal successors, (1048), 7 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:38,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:43:38,608 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:43:38,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-08-29 19:43:38,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:43:38,818 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:43:38,818 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:43:38,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1490732010, now seen corresponding path program 1 times [2023-08-29 19:43:38,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 19:43:38,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [833672582] [2023-08-29 19:43:38,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:43:38,819 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:43:38,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 19:43:38,820 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 19:43:38,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-08-29 19:43:38,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:43:38,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-29 19:43:38,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:43:39,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:43:39,209 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 19:43:39,209 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 19:43:39,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [833672582] [2023-08-29 19:43:39,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [833672582] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:43:39,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:43:39,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-08-29 19:43:39,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068755358] [2023-08-29 19:43:39,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:43:39,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-29 19:43:39,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 19:43:39,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-29 19:43:39,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2023-08-29 19:43:40,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 330 [2023-08-29 19:43:40,528 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 87 transitions, 594 flow. Second operand has 13 states, 13 states have (on average 140.53846153846155) internal successors, (1827), 13 states have internal predecessors, (1827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:40,528 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:43:40,528 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 330 [2023-08-29 19:43:40,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:43:42,066 INFO L130 PetriNetUnfolder]: 2210/4191 cut-off events. [2023-08-29 19:43:42,066 INFO L131 PetriNetUnfolder]: For 3063/3063 co-relation queries the response was YES. [2023-08-29 19:43:42,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12188 conditions, 4191 events. 2210/4191 cut-off events. For 3063/3063 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 24174 event pairs, 639 based on Foata normal form. 38/4191 useless extension candidates. Maximal degree in co-relation 12166. Up to 2694 conditions per place. [2023-08-29 19:43:42,083 INFO L137 encePairwiseOnDemand]: 315/330 looper letters, 191 selfloop transitions, 33 changer transitions 0/226 dead transitions. [2023-08-29 19:43:42,083 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 226 transitions, 1573 flow [2023-08-29 19:43:42,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-29 19:43:42,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-29 19:43:42,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2537 transitions. [2023-08-29 19:43:42,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45222816399286986 [2023-08-29 19:43:42,094 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2537 transitions. [2023-08-29 19:43:42,094 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2537 transitions. [2023-08-29 19:43:42,095 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:43:42,095 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2537 transitions. [2023-08-29 19:43:42,101 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 149.23529411764707) internal successors, (2537), 17 states have internal predecessors, (2537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:42,109 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 330.0) internal successors, (5940), 18 states have internal predecessors, (5940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:42,110 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 330.0) internal successors, (5940), 18 states have internal predecessors, (5940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:42,110 INFO L175 Difference]: Start difference. First operand has 86 places, 87 transitions, 594 flow. Second operand 17 states and 2537 transitions. [2023-08-29 19:43:42,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 226 transitions, 1573 flow [2023-08-29 19:43:42,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 226 transitions, 1508 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-29 19:43:42,127 INFO L231 Difference]: Finished difference. Result has 112 places, 113 transitions, 891 flow [2023-08-29 19:43:42,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=550, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=891, PETRI_PLACES=112, PETRI_TRANSITIONS=113} [2023-08-29 19:43:42,128 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 63 predicate places. [2023-08-29 19:43:42,129 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 113 transitions, 891 flow [2023-08-29 19:43:42,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 140.53846153846155) internal successors, (1827), 13 states have internal predecessors, (1827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:42,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:43:42,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:43:42,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-08-29 19:43:42,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:43:42,339 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:43:42,340 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:43:42,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1867234959, now seen corresponding path program 1 times [2023-08-29 19:43:42,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 19:43:42,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [431731773] [2023-08-29 19:43:42,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:43:42,340 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:43:42,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 19:43:42,341 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 19:43:42,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-08-29 19:43:42,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:43:42,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-29 19:43:42,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:43:42,443 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 19:43:42,444 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 19:43:42,445 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 19:43:42,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [431731773] [2023-08-29 19:43:42,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [431731773] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:43:42,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:43:42,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 19:43:42,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497604821] [2023-08-29 19:43:42,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:43:42,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:43:42,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 19:43:42,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:43:42,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:43:42,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 330 [2023-08-29 19:43:42,456 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 113 transitions, 891 flow. Second operand has 3 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:42,456 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:43:42,456 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 330 [2023-08-29 19:43:42,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:43:43,028 INFO L130 PetriNetUnfolder]: 2391/4682 cut-off events. [2023-08-29 19:43:43,028 INFO L131 PetriNetUnfolder]: For 6746/6746 co-relation queries the response was YES. [2023-08-29 19:43:43,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15237 conditions, 4682 events. 2391/4682 cut-off events. For 6746/6746 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 28821 event pairs, 1657 based on Foata normal form. 102/4716 useless extension candidates. Maximal degree in co-relation 15201. Up to 3747 conditions per place. [2023-08-29 19:43:43,049 INFO L137 encePairwiseOnDemand]: 326/330 looper letters, 154 selfloop transitions, 3 changer transitions 0/167 dead transitions. [2023-08-29 19:43:43,049 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 167 transitions, 1590 flow [2023-08-29 19:43:43,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:43:43,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:43:43,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 528 transitions. [2023-08-29 19:43:43,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2023-08-29 19:43:43,051 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 528 transitions. [2023-08-29 19:43:43,051 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 528 transitions. [2023-08-29 19:43:43,052 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:43:43,052 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 528 transitions. [2023-08-29 19:43:43,053 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 176.0) internal successors, (528), 3 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:43,054 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 330.0) internal successors, (1320), 4 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:43,054 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 330.0) internal successors, (1320), 4 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:43,054 INFO L175 Difference]: Start difference. First operand has 112 places, 113 transitions, 891 flow. Second operand 3 states and 528 transitions. [2023-08-29 19:43:43,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 167 transitions, 1590 flow [2023-08-29 19:43:43,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 167 transitions, 1570 flow, removed 10 selfloop flow, removed 0 redundant places. [2023-08-29 19:43:43,088 INFO L231 Difference]: Finished difference. Result has 115 places, 115 transitions, 892 flow [2023-08-29 19:43:43,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=871, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=892, PETRI_PLACES=115, PETRI_TRANSITIONS=115} [2023-08-29 19:43:43,088 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 66 predicate places. [2023-08-29 19:43:43,089 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 115 transitions, 892 flow [2023-08-29 19:43:43,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:43,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:43:43,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:43:43,101 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Ended with exit code 0 [2023-08-29 19:43:43,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:43:43,299 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:43:43,299 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:43:43,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1886484981, now seen corresponding path program 1 times [2023-08-29 19:43:43,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 19:43:43,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1511955872] [2023-08-29 19:43:43,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:43:43,300 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:43:43,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 19:43:43,301 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 19:43:43,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-08-29 19:43:43,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:43:43,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-29 19:43:43,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:43:43,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-29 19:43:43,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-08-29 19:43:43,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:43:43,839 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 19:43:43,839 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 19:43:43,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1511955872] [2023-08-29 19:43:43,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1511955872] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:43:43,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:43:43,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-29 19:43:43,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994975271] [2023-08-29 19:43:43,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:43:43,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-29 19:43:43,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 19:43:43,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-29 19:43:43,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2023-08-29 19:43:45,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 330 [2023-08-29 19:43:45,132 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 115 transitions, 892 flow. Second operand has 15 states, 15 states have (on average 130.46666666666667) internal successors, (1957), 15 states have internal predecessors, (1957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:45,132 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:43:45,132 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 330 [2023-08-29 19:43:45,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:43:47,275 INFO L130 PetriNetUnfolder]: 3168/6068 cut-off events. [2023-08-29 19:43:47,275 INFO L131 PetriNetUnfolder]: For 8322/8322 co-relation queries the response was YES. [2023-08-29 19:43:47,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20622 conditions, 6068 events. 3168/6068 cut-off events. For 8322/8322 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 38271 event pairs, 912 based on Foata normal form. 12/6080 useless extension candidates. Maximal degree in co-relation 20584. Up to 4467 conditions per place. [2023-08-29 19:43:47,314 INFO L137 encePairwiseOnDemand]: 313/330 looper letters, 234 selfloop transitions, 47 changer transitions 0/283 dead transitions. [2023-08-29 19:43:47,314 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 283 transitions, 2289 flow [2023-08-29 19:43:47,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-29 19:43:47,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-29 19:43:47,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3158 transitions. [2023-08-29 19:43:47,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4160737812911726 [2023-08-29 19:43:47,322 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3158 transitions. [2023-08-29 19:43:47,322 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3158 transitions. [2023-08-29 19:43:47,324 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:43:47,324 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3158 transitions. [2023-08-29 19:43:47,367 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 137.30434782608697) internal successors, (3158), 23 states have internal predecessors, (3158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:47,375 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 330.0) internal successors, (7920), 24 states have internal predecessors, (7920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:47,376 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 330.0) internal successors, (7920), 24 states have internal predecessors, (7920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:47,377 INFO L175 Difference]: Start difference. First operand has 115 places, 115 transitions, 892 flow. Second operand 23 states and 3158 transitions. [2023-08-29 19:43:47,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 283 transitions, 2289 flow [2023-08-29 19:43:47,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 283 transitions, 2276 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 19:43:47,416 INFO L231 Difference]: Finished difference. Result has 152 places, 158 transitions, 1442 flow [2023-08-29 19:43:47,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=889, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1442, PETRI_PLACES=152, PETRI_TRANSITIONS=158} [2023-08-29 19:43:47,416 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 103 predicate places. [2023-08-29 19:43:47,417 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 158 transitions, 1442 flow [2023-08-29 19:43:47,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 130.46666666666667) internal successors, (1957), 15 states have internal predecessors, (1957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:47,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:43:47,417 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:43:47,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2023-08-29 19:43:47,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:43:47,627 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:43:47,628 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:43:47,628 INFO L85 PathProgramCache]: Analyzing trace with hash -187980491, now seen corresponding path program 2 times [2023-08-29 19:43:47,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 19:43:47,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [469851159] [2023-08-29 19:43:47,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 19:43:47,628 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:43:47,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 19:43:47,629 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 19:43:47,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-08-29 19:43:47,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-29 19:43:47,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 19:43:47,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-29 19:43:47,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:43:47,753 INFO L321 Elim1Store]: treesize reduction 22, result has 29.0 percent of original size [2023-08-29 19:43:47,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 24 [2023-08-29 19:43:47,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-29 19:43:47,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-29 19:43:48,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-08-29 19:43:48,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:43:48,273 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 19:43:48,273 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 19:43:48,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [469851159] [2023-08-29 19:43:48,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [469851159] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:43:48,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:43:48,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-08-29 19:43:48,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177042199] [2023-08-29 19:43:48,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:43:48,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-29 19:43:48,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 19:43:48,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-29 19:43:48,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2023-08-29 19:43:49,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 330 [2023-08-29 19:43:49,771 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 158 transitions, 1442 flow. Second operand has 16 states, 16 states have (on average 127.375) internal successors, (2038), 16 states have internal predecessors, (2038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:49,772 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:43:49,772 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 330 [2023-08-29 19:43:49,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:43:51,510 INFO L130 PetriNetUnfolder]: 3729/7146 cut-off events. [2023-08-29 19:43:51,510 INFO L131 PetriNetUnfolder]: For 12053/12053 co-relation queries the response was YES. [2023-08-29 19:43:51,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25514 conditions, 7146 events. 3729/7146 cut-off events. For 12053/12053 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 46075 event pairs, 1227 based on Foata normal form. 6/7149 useless extension candidates. Maximal degree in co-relation 25460. Up to 5387 conditions per place. [2023-08-29 19:43:51,552 INFO L137 encePairwiseOnDemand]: 313/330 looper letters, 237 selfloop transitions, 43 changer transitions 0/282 dead transitions. [2023-08-29 19:43:51,553 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 282 transitions, 2708 flow [2023-08-29 19:43:51,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-29 19:43:51,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-29 19:43:51,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2041 transitions. [2023-08-29 19:43:51,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4123232323232323 [2023-08-29 19:43:51,557 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2041 transitions. [2023-08-29 19:43:51,557 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2041 transitions. [2023-08-29 19:43:51,557 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:43:51,557 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2041 transitions. [2023-08-29 19:43:51,562 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 136.06666666666666) internal successors, (2041), 15 states have internal predecessors, (2041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:51,567 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 330.0) internal successors, (5280), 16 states have internal predecessors, (5280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:51,568 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 330.0) internal successors, (5280), 16 states have internal predecessors, (5280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:51,568 INFO L175 Difference]: Start difference. First operand has 152 places, 158 transitions, 1442 flow. Second operand 15 states and 2041 transitions. [2023-08-29 19:43:51,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 282 transitions, 2708 flow [2023-08-29 19:43:51,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 282 transitions, 2696 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-08-29 19:43:51,625 INFO L231 Difference]: Finished difference. Result has 175 places, 185 transitions, 1886 flow [2023-08-29 19:43:51,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=1434, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1886, PETRI_PLACES=175, PETRI_TRANSITIONS=185} [2023-08-29 19:43:51,625 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 126 predicate places. [2023-08-29 19:43:51,626 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 185 transitions, 1886 flow [2023-08-29 19:43:51,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 127.375) internal successors, (2038), 16 states have internal predecessors, (2038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:51,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:43:51,626 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:43:51,634 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2023-08-29 19:43:51,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:43:51,829 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:43:51,830 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:43:51,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1824818857, now seen corresponding path program 3 times [2023-08-29 19:43:51,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 19:43:51,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1017081224] [2023-08-29 19:43:51,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 19:43:51,830 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:43:51,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 19:43:51,831 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 19:43:51,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-08-29 19:43:51,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-29 19:43:51,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 19:43:51,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-29 19:43:51,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:43:51,975 INFO L321 Elim1Store]: treesize reduction 17, result has 45.2 percent of original size [2023-08-29 19:43:51,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 38 [2023-08-29 19:43:52,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-29 19:43:52,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-29 19:43:52,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-08-29 19:43:52,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:43:52,491 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 19:43:52,491 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 19:43:52,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1017081224] [2023-08-29 19:43:52,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1017081224] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:43:52,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:43:52,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-08-29 19:43:52,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922951597] [2023-08-29 19:43:52,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:43:52,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-29 19:43:52,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 19:43:52,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-29 19:43:52,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2023-08-29 19:43:53,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 330 [2023-08-29 19:43:53,890 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 185 transitions, 1886 flow. Second operand has 16 states, 16 states have (on average 127.375) internal successors, (2038), 16 states have internal predecessors, (2038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:53,890 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:43:53,890 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 330 [2023-08-29 19:43:53,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:43:56,148 INFO L130 PetriNetUnfolder]: 3709/7106 cut-off events. [2023-08-29 19:43:56,149 INFO L131 PetriNetUnfolder]: For 13898/13898 co-relation queries the response was YES. [2023-08-29 19:43:56,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26345 conditions, 7106 events. 3709/7106 cut-off events. For 13898/13898 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 45703 event pairs, 909 based on Foata normal form. 12/7112 useless extension candidates. Maximal degree in co-relation 26281. Up to 3383 conditions per place. [2023-08-29 19:43:56,197 INFO L137 encePairwiseOnDemand]: 313/330 looper letters, 193 selfloop transitions, 105 changer transitions 0/300 dead transitions. [2023-08-29 19:43:56,197 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 300 transitions, 2977 flow [2023-08-29 19:43:56,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-29 19:43:56,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-29 19:43:56,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2944 transitions. [2023-08-29 19:43:56,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40550964187327826 [2023-08-29 19:43:56,201 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2944 transitions. [2023-08-29 19:43:56,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2944 transitions. [2023-08-29 19:43:56,202 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:43:56,202 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2944 transitions. [2023-08-29 19:43:56,206 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 133.8181818181818) internal successors, (2944), 22 states have internal predecessors, (2944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:56,213 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 330.0) internal successors, (7590), 23 states have internal predecessors, (7590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:56,214 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 330.0) internal successors, (7590), 23 states have internal predecessors, (7590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:56,215 INFO L175 Difference]: Start difference. First operand has 175 places, 185 transitions, 1886 flow. Second operand 22 states and 2944 transitions. [2023-08-29 19:43:56,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 300 transitions, 2977 flow [2023-08-29 19:43:56,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 300 transitions, 2958 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-08-29 19:43:56,293 INFO L231 Difference]: Finished difference. Result has 196 places, 196 transitions, 2223 flow [2023-08-29 19:43:56,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=1867, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=2223, PETRI_PLACES=196, PETRI_TRANSITIONS=196} [2023-08-29 19:43:56,294 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 147 predicate places. [2023-08-29 19:43:56,294 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 196 transitions, 2223 flow [2023-08-29 19:43:56,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 127.375) internal successors, (2038), 16 states have internal predecessors, (2038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:56,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:43:56,295 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:43:56,303 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Ended with exit code 0 [2023-08-29 19:43:56,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:43:56,500 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:43:56,500 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:43:56,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1957063094, now seen corresponding path program 1 times [2023-08-29 19:43:56,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 19:43:56,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1534620951] [2023-08-29 19:43:56,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:43:56,501 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:43:56,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 19:43:56,502 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 19:43:56,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-08-29 19:43:56,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:43:56,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-29 19:43:56,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:43:56,615 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 19:43:56,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 19:43:56,633 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 19:43:56,634 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 19:43:56,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1534620951] [2023-08-29 19:43:56,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1534620951] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 19:43:56,634 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 19:43:56,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2023-08-29 19:43:56,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569419455] [2023-08-29 19:43:56,635 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 19:43:56,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 19:43:56,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 19:43:56,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 19:43:56,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-29 19:43:56,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 330 [2023-08-29 19:43:56,654 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 196 transitions, 2223 flow. Second operand has 6 states, 6 states have (on average 158.33333333333334) internal successors, (950), 6 states have internal predecessors, (950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:56,654 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:43:56,654 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 330 [2023-08-29 19:43:56,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:43:58,769 INFO L130 PetriNetUnfolder]: 6549/13336 cut-off events. [2023-08-29 19:43:58,769 INFO L131 PetriNetUnfolder]: For 35357/35361 co-relation queries the response was YES. [2023-08-29 19:43:58,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51761 conditions, 13336 events. 6549/13336 cut-off events. For 35357/35361 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 105073 event pairs, 2123 based on Foata normal form. 1756/15091 useless extension candidates. Maximal degree in co-relation 51692. Up to 3645 conditions per place. [2023-08-29 19:43:58,874 INFO L137 encePairwiseOnDemand]: 325/330 looper letters, 552 selfloop transitions, 22 changer transitions 0/587 dead transitions. [2023-08-29 19:43:58,875 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 587 transitions, 7599 flow [2023-08-29 19:43:58,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 19:43:58,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 19:43:58,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1059 transitions. [2023-08-29 19:43:58,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5348484848484848 [2023-08-29 19:43:58,877 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1059 transitions. [2023-08-29 19:43:58,877 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1059 transitions. [2023-08-29 19:43:58,877 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:43:58,877 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1059 transitions. [2023-08-29 19:43:58,879 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 176.5) internal successors, (1059), 6 states have internal predecessors, (1059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:58,880 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 330.0) internal successors, (2310), 7 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:58,880 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 330.0) internal successors, (2310), 7 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:58,880 INFO L175 Difference]: Start difference. First operand has 196 places, 196 transitions, 2223 flow. Second operand 6 states and 1059 transitions. [2023-08-29 19:43:58,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 587 transitions, 7599 flow [2023-08-29 19:43:59,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 587 transitions, 7069 flow, removed 58 selfloop flow, removed 15 redundant places. [2023-08-29 19:43:59,061 INFO L231 Difference]: Finished difference. Result has 190 places, 207 transitions, 2242 flow [2023-08-29 19:43:59,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=2039, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2242, PETRI_PLACES=190, PETRI_TRANSITIONS=207} [2023-08-29 19:43:59,062 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 141 predicate places. [2023-08-29 19:43:59,062 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 207 transitions, 2242 flow [2023-08-29 19:43:59,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 158.33333333333334) internal successors, (950), 6 states have internal predecessors, (950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:59,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:43:59,063 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:43:59,076 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2023-08-29 19:43:59,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:43:59,272 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:43:59,272 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:43:59,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1014945870, now seen corresponding path program 1 times [2023-08-29 19:43:59,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 19:43:59,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1175135743] [2023-08-29 19:43:59,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:43:59,273 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:43:59,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 19:43:59,274 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 19:43:59,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2023-08-29 19:43:59,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 19:43:59,382 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-29 19:43:59,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 19:43:59,532 INFO L130 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2023-08-29 19:43:59,533 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-29 19:43:59,534 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location t2Err2ASSERT_VIOLATIONMEMORY_LEAK (22 of 23 remaining) [2023-08-29 19:43:59,535 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 23 remaining) [2023-08-29 19:43:59,535 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 23 remaining) [2023-08-29 19:43:59,536 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 23 remaining) [2023-08-29 19:43:59,536 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 23 remaining) [2023-08-29 19:43:59,536 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 23 remaining) [2023-08-29 19:43:59,536 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 23 remaining) [2023-08-29 19:43:59,536 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 23 remaining) [2023-08-29 19:43:59,537 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 23 remaining) [2023-08-29 19:43:59,537 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (13 of 23 remaining) [2023-08-29 19:43:59,537 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 23 remaining) [2023-08-29 19:43:59,537 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (11 of 23 remaining) [2023-08-29 19:43:59,537 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 23 remaining) [2023-08-29 19:43:59,538 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 23 remaining) [2023-08-29 19:43:59,538 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err2ASSERT_VIOLATIONMEMORY_LEAK (8 of 23 remaining) [2023-08-29 19:43:59,538 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err2ASSERT_VIOLATIONMEMORY_LEAK (7 of 23 remaining) [2023-08-29 19:43:59,538 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 23 remaining) [2023-08-29 19:43:59,538 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 23 remaining) [2023-08-29 19:43:59,539 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 23 remaining) [2023-08-29 19:43:59,539 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 23 remaining) [2023-08-29 19:43:59,539 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err2ASSERT_VIOLATIONMEMORY_LEAK (2 of 23 remaining) [2023-08-29 19:43:59,539 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 23 remaining) [2023-08-29 19:43:59,539 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 23 remaining) [2023-08-29 19:43:59,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2023-08-29 19:43:59,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:43:59,750 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:43:59,755 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-29 19:43:59,755 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-29 19:43:59,808 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.08 07:43:59 BasicIcfg [2023-08-29 19:43:59,809 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-29 19:43:59,809 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-08-29 19:43:59,809 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-08-29 19:43:59,810 INFO L275 PluginConnector]: Witness Printer initialized [2023-08-29 19:43:59,810 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 07:43:10" (3/4) ... [2023-08-29 19:43:59,812 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-08-29 19:43:59,812 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-08-29 19:43:59,813 INFO L158 Benchmark]: Toolchain (without parser) took 50634.56ms. Allocated memory was 58.7MB in the beginning and 1.6GB in the end (delta: 1.5GB). Free memory was 37.0MB in the beginning and 1.1GB in the end (delta: -1.0GB). Peak memory consumption was 489.3MB. Max. memory is 16.1GB. [2023-08-29 19:43:59,813 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 48.2MB. Free memory was 26.4MB in the beginning and 26.4MB in the end (delta: 33.5kB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-29 19:43:59,813 INFO L158 Benchmark]: CACSL2BoogieTranslator took 560.51ms. Allocated memory is still 58.7MB. Free memory was 36.9MB in the beginning and 31.8MB in the end (delta: 5.1MB). Peak memory consumption was 16.6MB. Max. memory is 16.1GB. [2023-08-29 19:43:59,814 INFO L158 Benchmark]: Boogie Procedure Inliner took 63.22ms. Allocated memory is still 58.7MB. Free memory was 31.6MB in the beginning and 28.8MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-29 19:43:59,814 INFO L158 Benchmark]: Boogie Preprocessor took 55.91ms. Allocated memory is still 58.7MB. Free memory was 28.8MB in the beginning and 26.6MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-29 19:43:59,814 INFO L158 Benchmark]: RCFGBuilder took 654.06ms. Allocated memory was 58.7MB in the beginning and 71.3MB in the end (delta: 12.6MB). Free memory was 26.6MB in the beginning and 44.8MB in the end (delta: -18.3MB). Peak memory consumption was 11.8MB. Max. memory is 16.1GB. [2023-08-29 19:43:59,815 INFO L158 Benchmark]: TraceAbstraction took 49292.32ms. Allocated memory was 71.3MB in the beginning and 1.6GB in the end (delta: 1.5GB). Free memory was 44.2MB in the beginning and 1.1GB in the end (delta: -1.0GB). Peak memory consumption was 483.1MB. Max. memory is 16.1GB. [2023-08-29 19:43:59,815 INFO L158 Benchmark]: Witness Printer took 3.12ms. Allocated memory is still 1.6GB. Free memory is still 1.1GB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-29 19:43:59,816 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 48.2MB. Free memory was 26.4MB in the beginning and 26.4MB in the end (delta: 33.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 560.51ms. Allocated memory is still 58.7MB. Free memory was 36.9MB in the beginning and 31.8MB in the end (delta: 5.1MB). Peak memory consumption was 16.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 63.22ms. Allocated memory is still 58.7MB. Free memory was 31.6MB in the beginning and 28.8MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 55.91ms. Allocated memory is still 58.7MB. Free memory was 28.8MB in the beginning and 26.6MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 654.06ms. Allocated memory was 58.7MB in the beginning and 71.3MB in the end (delta: 12.6MB). Free memory was 26.6MB in the beginning and 44.8MB in the end (delta: -18.3MB). Peak memory consumption was 11.8MB. Max. memory is 16.1GB. * TraceAbstraction took 49292.32ms. Allocated memory was 71.3MB in the beginning and 1.6GB in the end (delta: 1.5GB). Free memory was 44.2MB in the beginning and 1.1GB in the end (delta: -1.0GB). Peak memory consumption was 483.1MB. Max. memory is 16.1GB. * Witness Printer took 3.12ms. Allocated memory is still 1.6GB. Free memory is still 1.1GB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 8.1s, 161 PlacesBefore, 49 PlacesAfterwards, 164 TransitionsBefore, 47 TransitionsAfterwards, 8060 CoEnabledTransitionPairs, 6 FixpointIterations, 42 TrivialSequentialCompositions, 95 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 18 ConcurrentYvCompositions, 5 ChoiceCompositions, 160 TotalNumberOfCompositions, 12918 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 9264, independent: 9043, independent conditional: 0, independent unconditional: 9043, dependent: 221, dependent conditional: 0, dependent unconditional: 221, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 4651, independent: 4594, independent conditional: 0, independent unconditional: 4594, dependent: 57, dependent conditional: 0, dependent unconditional: 57, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 9264, independent: 4449, independent conditional: 0, independent unconditional: 4449, dependent: 164, dependent conditional: 0, dependent unconditional: 164, unknown: 4651, unknown conditional: 0, unknown unconditional: 4651] , Statistics on independence cache: Total cache size (in pairs): 309, Positive cache size: 288, Positive conditional cache size: 0, Positive unconditional cache size: 288, Negative cache size: 21, Negative conditional cache size: 0, Negative unconditional cache size: 21, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - UnprovableResult [Line: 940]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 940. Possible FailurePath: [L935] 0 static int top=0; [L936] 0 static unsigned int arr[(400)]; [L937] 0 pthread_mutex_t m; [L938] 0 _Bool flag=(0); [L1019] 0 pthread_t id1, id2; [L1021] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arr={3:0}, flag=0, id1={7:0}, id2={15:0}, m={4:0}, pthread_create(&id1, ((void *)0), t1, ((void *)0))=0, top=0] [L988] 1 int i; [L989] 1 unsigned int tmp; [L990] 1 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L1022] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arr={3:0}, flag=0, id1={7:0}, id2={15:0}, m={4:0}, pthread_create(&id2, ((void *)0), t2, ((void *)0))=1, top=0] [L990] COND TRUE 1 i<(400) [L993] 1 tmp = __VERIFIER_nondet_uint() [L994] CALL 1 assume_abort_if_not(tmp < (400)) [L23] COND FALSE 1 !(!cond) [L994] RET 1 assume_abort_if_not(tmp < (400)) [L995] CALL, EXPR 1 push(arr,tmp) [L960] COND FALSE 1 !(top==(400)) [L967] CALL, EXPR 1 get_top() [L952] 1 return top; [L967] RET, EXPR 1 get_top() [L967] 1 stack[get_top()] = x [L968] CALL 1 inc_top() [L944] 1 top++ [L968] RET 1 inc_top() [L970] 1 return 0; [L995] RET, EXPR 1 push(arr,tmp) [L995] COND FALSE 1 !(push(arr,tmp)==(-1)) [L997] 1 flag=(1) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=0, m={4:0}, tmp=0, top=1] [L990] 1 i++ VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, tmp=0, top=1] [L1004] 2 int i; [L1005] 2 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=0, m={4:0}, top=1] [L1005] COND TRUE 2 i<(400) [L1008] COND TRUE 2 \read(flag) [L1010] CALL, EXPR 2 pop(arr) [L974] CALL, EXPR 2 get_top() [L952] 2 return top; [L974] RET, EXPR 2 get_top() [L974] COND FALSE 2 !(get_top()==0) [L981] CALL 2 dec_top() [L948] 2 top-- VAL [arr={3:0}, flag=1, m={4:0}, top=0] [L981] RET 2 dec_top() [L982] CALL, EXPR 2 get_top() [L952] 2 return top; [L982] RET, EXPR 2 get_top() [L982] EXPR 2 stack[get_top()] [L982] 2 return stack[get_top()]; [L1010] RET, EXPR 2 pop(arr) [L1010] COND FALSE 2 !(!(pop(arr)!=(-2))) [L1005] 2 i++ VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, top=0] [L1005] COND TRUE 2 i<(400) [L1008] COND TRUE 2 \read(flag) [L1010] CALL, EXPR 2 pop(arr) [L974] CALL, EXPR 2 get_top() [L952] 2 return top; [L974] RET, EXPR 2 get_top() [L974] COND TRUE 2 get_top()==0 [L977] 2 return (-2); [L1010] RET, EXPR 2 pop(arr) [L1010] COND TRUE 2 !(pop(arr)!=(-2)) [L1011] CALL 2 error() [L940] 2 reach_error() VAL [arr={3:0}, flag=1, m={4:0}, top=0] - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1017]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1022]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 1021]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 940]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 261 locations, 23 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 49.0s, OverallIterations: 22, TraceHistogramMax: 2, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 30.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 8.3s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 4887 SdHoareTripleChecker+Valid, 18.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4131 mSDsluCounter, 5878 SdHoareTripleChecker+Invalid, 16.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 5574 mSDsCounter, 174 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 18909 IncrementalHoareTripleChecker+Invalid, 19083 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 174 mSolverCounterUnsat, 304 mSDtfsCounter, 18909 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 376 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 3.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2242occurred in iteration=21, InterpolantAutomatonStates: 161, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 3.5s InterpolantComputationTime, 291 NumberOfCodeBlocks, 291 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 293 ConstructedInterpolants, 10 QuantifiedInterpolants, 2421 SizeOfPredicates, 108 NumberOfNonLiveVariables, 2046 ConjunctsInSsa, 211 ConjunctsInUnsatCore, 24 InterpolantComputations, 18 PerfectInterpolantSequences, 5/17 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2023-08-29 19:43:59,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample