./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/pthread/stack_longest-2.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/pthread/stack_longest-2.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 5773bc320dd9dee5d943610df8c4ec3040864edddf388dd42a51d37167245e47 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-31 22:22:04,771 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 22:22:04,773 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 22:22:04,812 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 22:22:04,813 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 22:22:04,816 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 22:22:04,817 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 22:22:04,820 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 22:22:04,822 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 22:22:04,827 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 22:22:04,828 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 22:22:04,829 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 22:22:04,830 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 22:22:04,832 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 22:22:04,833 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 22:22:04,834 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 22:22:04,834 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 22:22:04,835 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 22:22:04,836 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 22:22:04,838 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 22:22:04,839 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 22:22:04,843 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 22:22:04,845 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 22:22:04,846 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 22:22:04,852 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 22:22:04,854 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 22:22:04,854 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 22:22:04,856 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 22:22:04,856 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 22:22:04,857 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 22:22:04,857 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 22:22:04,859 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 22:22:04,861 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 22:22:04,861 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 22:22:04,862 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 22:22:04,862 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 22:22:04,863 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 22:22:04,863 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 22:22:04,863 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 22:22:04,864 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 22:22:04,864 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 22:22:04,866 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-31 22:22:04,903 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 22:22:04,903 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 22:22:04,904 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 22:22:04,904 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 22:22:04,905 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 22:22:04,905 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 22:22:04,906 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 22:22:04,906 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 22:22:04,906 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 22:22:04,906 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 22:22:04,907 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 22:22:04,907 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-31 22:22:04,907 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 22:22:04,908 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 22:22:04,908 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 22:22:04,908 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-31 22:22:04,908 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-31 22:22:04,908 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-31 22:22:04,908 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 22:22:04,909 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-31 22:22:04,909 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 22:22:04,909 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 22:22:04,909 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 22:22:04,909 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 22:22:04,910 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 22:22:04,910 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 22:22:04,910 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 22:22:04,910 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 22:22:04,910 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 22:22:04,910 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 22:22:04,911 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 22:22:04,911 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 22:22:04,911 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 22:22:04,911 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 22:22:04,912 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5773bc320dd9dee5d943610df8c4ec3040864edddf388dd42a51d37167245e47 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-08-31 22:22:05,187 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 22:22:05,212 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 22:22:05,214 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 22:22:05,215 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 22:22:05,215 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 22:22:05,216 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/stack_longest-2.i [2023-08-31 22:22:06,395 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 22:22:06,668 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 22:22:06,668 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longest-2.i [2023-08-31 22:22:06,690 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/509d0fcaf/51ccfa87b6e6433896362b1263c67a7f/FLAG48f8efc7f [2023-08-31 22:22:06,703 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/509d0fcaf/51ccfa87b6e6433896362b1263c67a7f [2023-08-31 22:22:06,704 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 22:22:06,705 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 22:22:06,706 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 22:22:06,706 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 22:22:06,709 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 22:22:06,710 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 10:22:06" (1/1) ... [2023-08-31 22:22:06,710 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f16b34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:22:06, skipping insertion in model container [2023-08-31 22:22:06,711 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 10:22:06" (1/1) ... [2023-08-31 22:22:06,716 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 22:22:06,764 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 22:22:07,106 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_longest-2.i[41530,41543] [2023-08-31 22:22:07,157 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 22:22:07,168 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 22:22:07,197 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_longest-2.i[41530,41543] [2023-08-31 22:22:07,205 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 22:22:07,267 INFO L208 MainTranslator]: Completed translation [2023-08-31 22:22:07,268 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:22:07 WrapperNode [2023-08-31 22:22:07,268 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 22:22:07,270 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 22:22:07,270 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 22:22:07,270 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 22:22:07,276 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:22:07" (1/1) ... [2023-08-31 22:22:07,306 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:22:07" (1/1) ... [2023-08-31 22:22:07,345 INFO L138 Inliner]: procedures = 277, calls = 38, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 149 [2023-08-31 22:22:07,345 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 22:22:07,346 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 22:22:07,346 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 22:22:07,346 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 22:22:07,354 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:22:07" (1/1) ... [2023-08-31 22:22:07,355 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:22:07" (1/1) ... [2023-08-31 22:22:07,372 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:22:07" (1/1) ... [2023-08-31 22:22:07,372 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:22:07" (1/1) ... [2023-08-31 22:22:07,378 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:22:07" (1/1) ... [2023-08-31 22:22:07,390 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:22:07" (1/1) ... [2023-08-31 22:22:07,392 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:22:07" (1/1) ... [2023-08-31 22:22:07,400 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:22:07" (1/1) ... [2023-08-31 22:22:07,403 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 22:22:07,409 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 22:22:07,409 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 22:22:07,409 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 22:22:07,410 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:22:07" (1/1) ... [2023-08-31 22:22:07,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 22:22:07,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 22:22:07,442 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-31 22:22:07,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-31 22:22:07,486 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-31 22:22:07,486 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-31 22:22:07,487 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-31 22:22:07,487 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-31 22:22:07,487 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 22:22:07,487 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 22:22:07,487 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 22:22:07,487 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 22:22:07,488 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-31 22:22:07,488 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 22:22:07,488 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 22:22:07,488 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 22:22:07,488 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 22:22:07,490 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-31 22:22:07,669 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 22:22:07,671 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 22:22:07,953 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 22:22:07,960 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 22:22:07,963 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-31 22:22:07,965 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 10:22:07 BoogieIcfgContainer [2023-08-31 22:22:07,965 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 22:22:07,967 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 22:22:07,967 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 22:22:07,970 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 22:22:07,970 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 10:22:06" (1/3) ... [2023-08-31 22:22:07,970 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f9ee354 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 10:22:07, skipping insertion in model container [2023-08-31 22:22:07,971 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:22:07" (2/3) ... [2023-08-31 22:22:07,971 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f9ee354 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 10:22:07, skipping insertion in model container [2023-08-31 22:22:07,971 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 10:22:07" (3/3) ... [2023-08-31 22:22:07,972 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longest-2.i [2023-08-31 22:22:07,983 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 22:22:07,983 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2023-08-31 22:22:07,983 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 22:22:08,081 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-31 22:22:08,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 164 places, 167 transitions, 350 flow [2023-08-31 22:22:08,179 INFO L130 PetriNetUnfolder]: 10/165 cut-off events. [2023-08-31 22:22:08,179 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 22:22:08,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174 conditions, 165 events. 10/165 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 412 event pairs, 0 based on Foata normal form. 0/140 useless extension candidates. Maximal degree in co-relation 119. Up to 3 conditions per place. [2023-08-31 22:22:08,190 INFO L82 GeneralOperation]: Start removeDead. Operand has 164 places, 167 transitions, 350 flow [2023-08-31 22:22:08,195 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 158 places, 161 transitions, 334 flow [2023-08-31 22:22:08,198 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:22:08,214 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 158 places, 161 transitions, 334 flow [2023-08-31 22:22:08,217 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 158 places, 161 transitions, 334 flow [2023-08-31 22:22:08,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 158 places, 161 transitions, 334 flow [2023-08-31 22:22:08,243 INFO L130 PetriNetUnfolder]: 10/161 cut-off events. [2023-08-31 22:22:08,243 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 22:22:08,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170 conditions, 161 events. 10/161 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 411 event pairs, 0 based on Foata normal form. 0/137 useless extension candidates. Maximal degree in co-relation 119. Up to 3 conditions per place. [2023-08-31 22:22:08,249 INFO L119 LiptonReduction]: Number of co-enabled transitions 7792 [2023-08-31 22:22:12,440 INFO L134 LiptonReduction]: Checked pairs total: 12544 [2023-08-31 22:22:12,440 INFO L136 LiptonReduction]: Total number of compositions: 160 [2023-08-31 22:22:12,453 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 22:22:12,458 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;@1e63bf68, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:22:12,458 INFO L358 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2023-08-31 22:22:12,460 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2023-08-31 22:22:12,460 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 22:22:12,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:22:12,461 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-31 22:22:12,461 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:22:12,465 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:22:12,465 INFO L85 PathProgramCache]: Analyzing trace with hash 680, now seen corresponding path program 1 times [2023-08-31 22:22:12,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:22:12,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478814205] [2023-08-31 22:22:12,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:22:12,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:22:12,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:22:12,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:22:12,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:22:12,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478814205] [2023-08-31 22:22:12,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478814205] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:22:12,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:22:12,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-31 22:22:12,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347360095] [2023-08-31 22:22:12,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:22:12,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-31 22:22:12,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:22:12,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-31 22:22:12,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-31 22:22:12,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 327 [2023-08-31 22:22:12,593 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 46 transitions, 104 flow. Second operand has 2 states, 2 states have (on average 156.5) internal successors, (313), 2 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:12,593 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:22:12,593 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 327 [2023-08-31 22:22:12,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:22:12,802 INFO L130 PetriNetUnfolder]: 1250/1969 cut-off events. [2023-08-31 22:22:12,803 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-31 22:22:12,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3932 conditions, 1969 events. 1250/1969 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 9149 event pairs, 994 based on Foata normal form. 0/1091 useless extension candidates. Maximal degree in co-relation 3680. Up to 1922 conditions per place. [2023-08-31 22:22:12,818 INFO L137 encePairwiseOnDemand]: 325/327 looper letters, 42 selfloop transitions, 0 changer transitions 0/44 dead transitions. [2023-08-31 22:22:12,818 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 44 transitions, 184 flow [2023-08-31 22:22:12,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-31 22:22:12,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-31 22:22:12,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 356 transitions. [2023-08-31 22:22:12,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5443425076452599 [2023-08-31 22:22:12,832 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 356 transitions. [2023-08-31 22:22:12,832 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 356 transitions. [2023-08-31 22:22:12,833 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:22:12,835 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 356 transitions. [2023-08-31 22:22:12,838 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 178.0) internal successors, (356), 2 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:12,842 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 327.0) internal successors, (981), 3 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:12,843 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 327.0) internal successors, (981), 3 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:12,844 INFO L175 Difference]: Start difference. First operand has 48 places, 46 transitions, 104 flow. Second operand 2 states and 356 transitions. [2023-08-31 22:22:12,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 44 transitions, 184 flow [2023-08-31 22:22:12,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 44 transitions, 176 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-31 22:22:12,849 INFO L231 Difference]: Finished difference. Result has 43 places, 44 transitions, 92 flow [2023-08-31 22:22:12,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=92, PETRI_PLACES=43, PETRI_TRANSITIONS=44} [2023-08-31 22:22:12,854 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -5 predicate places. [2023-08-31 22:22:12,854 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 44 transitions, 92 flow [2023-08-31 22:22:12,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 156.5) internal successors, (313), 2 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:12,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:22:12,855 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-31 22:22:12,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 22:22:12,856 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)] === [2023-08-31 22:22:12,856 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:22:12,856 INFO L85 PathProgramCache]: Analyzing trace with hash 671187, now seen corresponding path program 1 times [2023-08-31 22:22:12,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:22:12,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451136926] [2023-08-31 22:22:12,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:22:12,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:22:12,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:22:13,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:22:13,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:22:13,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451136926] [2023-08-31 22:22:13,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451136926] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:22:13,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:22:13,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-31 22:22:13,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675039365] [2023-08-31 22:22:13,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:22:13,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:22:13,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:22:13,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:22:13,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:22:13,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 327 [2023-08-31 22:22:13,084 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 44 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 152.0) internal successors, (456), 3 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:13,085 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:22:13,085 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 327 [2023-08-31 22:22:13,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:22:13,244 INFO L130 PetriNetUnfolder]: 1223/1917 cut-off events. [2023-08-31 22:22:13,245 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-31 22:22:13,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3802 conditions, 1917 events. 1223/1917 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 8798 event pairs, 972 based on Foata normal form. 0/1073 useless extension candidates. Maximal degree in co-relation 3799. Up to 1869 conditions per place. [2023-08-31 22:22:13,253 INFO L137 encePairwiseOnDemand]: 323/327 looper letters, 38 selfloop transitions, 2 changer transitions 0/42 dead transitions. [2023-08-31 22:22:13,254 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 42 transitions, 168 flow [2023-08-31 22:22:13,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:22:13,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:22:13,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 495 transitions. [2023-08-31 22:22:13,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5045871559633027 [2023-08-31 22:22:13,257 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 495 transitions. [2023-08-31 22:22:13,257 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 495 transitions. [2023-08-31 22:22:13,258 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:22:13,258 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 495 transitions. [2023-08-31 22:22:13,259 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:13,262 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:13,262 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:13,262 INFO L175 Difference]: Start difference. First operand has 43 places, 44 transitions, 92 flow. Second operand 3 states and 495 transitions. [2023-08-31 22:22:13,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 42 transitions, 168 flow [2023-08-31 22:22:13,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 42 transitions, 168 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 22:22:13,264 INFO L231 Difference]: Finished difference. Result has 43 places, 42 transitions, 92 flow [2023-08-31 22:22:13,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=43, PETRI_TRANSITIONS=42} [2023-08-31 22:22:13,265 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -5 predicate places. [2023-08-31 22:22:13,265 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 42 transitions, 92 flow [2023-08-31 22:22:13,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 152.0) internal successors, (456), 3 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:13,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:22:13,266 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-31 22:22:13,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-31 22:22:13,266 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)] === [2023-08-31 22:22:13,267 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:22:13,267 INFO L85 PathProgramCache]: Analyzing trace with hash 671188, now seen corresponding path program 1 times [2023-08-31 22:22:13,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:22:13,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224041757] [2023-08-31 22:22:13,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:22:13,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:22:13,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:22:13,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:22:13,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:22:13,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224041757] [2023-08-31 22:22:13,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224041757] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:22:13,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:22:13,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-31 22:22:13,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051945942] [2023-08-31 22:22:13,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:22:13,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:22:13,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:22:13,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:22:13,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:22:13,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 327 [2023-08-31 22:22:13,361 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 42 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 148.0) internal successors, (444), 3 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:13,361 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:22:13,361 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 327 [2023-08-31 22:22:13,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:22:13,496 INFO L130 PetriNetUnfolder]: 1196/1865 cut-off events. [2023-08-31 22:22:13,497 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-31 22:22:13,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3702 conditions, 1865 events. 1196/1865 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 8455 event pairs, 950 based on Foata normal form. 0/1055 useless extension candidates. Maximal degree in co-relation 3698. Up to 1818 conditions per place. [2023-08-31 22:22:13,514 INFO L137 encePairwiseOnDemand]: 323/327 looper letters, 36 selfloop transitions, 2 changer transitions 0/40 dead transitions. [2023-08-31 22:22:13,515 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 40 transitions, 164 flow [2023-08-31 22:22:13,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:22:13,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:22:13,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 481 transitions. [2023-08-31 22:22:13,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49031600407747195 [2023-08-31 22:22:13,517 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 481 transitions. [2023-08-31 22:22:13,517 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 481 transitions. [2023-08-31 22:22:13,518 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:22:13,518 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 481 transitions. [2023-08-31 22:22:13,519 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 160.33333333333334) internal successors, (481), 3 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:13,521 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:13,522 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:13,522 INFO L175 Difference]: Start difference. First operand has 43 places, 42 transitions, 92 flow. Second operand 3 states and 481 transitions. [2023-08-31 22:22:13,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 40 transitions, 164 flow [2023-08-31 22:22:13,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 40 transitions, 160 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 22:22:13,524 INFO L231 Difference]: Finished difference. Result has 41 places, 40 transitions, 88 flow [2023-08-31 22:22:13,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, 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} [2023-08-31 22:22:13,524 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -7 predicate places. [2023-08-31 22:22:13,525 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 40 transitions, 88 flow [2023-08-31 22:22:13,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 148.0) internal successors, (444), 3 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:13,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:22:13,526 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-31 22:22:13,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-31 22:22:13,526 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)] === [2023-08-31 22:22:13,526 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:22:13,527 INFO L85 PathProgramCache]: Analyzing trace with hash 645028316, now seen corresponding path program 1 times [2023-08-31 22:22:13,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:22:13,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019246099] [2023-08-31 22:22:13,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:22:13,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:22:13,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:22:13,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:22:13,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:22:13,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019246099] [2023-08-31 22:22:13,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019246099] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:22:13,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:22:13,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 22:22:13,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691527563] [2023-08-31 22:22:13,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:22:13,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 22:22:13,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:22:13,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 22:22:13,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-31 22:22:13,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 327 [2023-08-31 22:22:13,792 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 40 transitions, 88 flow. Second operand has 4 states, 4 states have (on average 150.25) internal successors, (601), 4 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:13,792 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:22:13,792 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 327 [2023-08-31 22:22:13,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:22:13,910 INFO L130 PetriNetUnfolder]: 875/1390 cut-off events. [2023-08-31 22:22:13,910 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-31 22:22:13,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2763 conditions, 1390 events. 875/1390 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 6042 event pairs, 688 based on Foata normal form. 0/849 useless extension candidates. Maximal degree in co-relation 2759. Up to 1354 conditions per place. [2023-08-31 22:22:13,916 INFO L137 encePairwiseOnDemand]: 324/327 looper letters, 35 selfloop transitions, 2 changer transitions 0/39 dead transitions. [2023-08-31 22:22:13,918 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 39 transitions, 160 flow [2023-08-31 22:22:13,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:22:13,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:22:13,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 485 transitions. [2023-08-31 22:22:13,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4943934760448522 [2023-08-31 22:22:13,922 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 485 transitions. [2023-08-31 22:22:13,922 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 485 transitions. [2023-08-31 22:22:13,923 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:22:13,923 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 485 transitions. [2023-08-31 22:22:13,924 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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) [2023-08-31 22:22:13,930 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:13,930 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:13,930 INFO L175 Difference]: Start difference. First operand has 41 places, 40 transitions, 88 flow. Second operand 3 states and 485 transitions. [2023-08-31 22:22:13,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 39 transitions, 160 flow [2023-08-31 22:22:13,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 39 transitions, 156 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 22:22:13,932 INFO L231 Difference]: Finished difference. Result has 40 places, 39 transitions, 86 flow [2023-08-31 22:22:13,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, 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} [2023-08-31 22:22:13,934 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -8 predicate places. [2023-08-31 22:22:13,934 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 39 transitions, 86 flow [2023-08-31 22:22:13,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 150.25) internal successors, (601), 4 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:13,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:22:13,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-31 22:22:13,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-31 22:22:13,935 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)] === [2023-08-31 22:22:13,936 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:22:13,936 INFO L85 PathProgramCache]: Analyzing trace with hash 645028315, now seen corresponding path program 1 times [2023-08-31 22:22:13,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:22:13,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353410940] [2023-08-31 22:22:13,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:22:13,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:22:13,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:22:14,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:22:14,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:22:14,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353410940] [2023-08-31 22:22:14,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353410940] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:22:14,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:22:14,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 22:22:14,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477281384] [2023-08-31 22:22:14,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:22:14,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 22:22:14,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:22:14,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 22:22:14,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-31 22:22:14,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 327 [2023-08-31 22:22:14,082 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 39 transitions, 86 flow. Second operand has 4 states, 4 states have (on average 144.25) internal successors, (577), 4 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:14,082 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:22:14,082 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 327 [2023-08-31 22:22:14,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:22:14,177 INFO L130 PetriNetUnfolder]: 554/915 cut-off events. [2023-08-31 22:22:14,177 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-31 22:22:14,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1824 conditions, 915 events. 554/915 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3804 event pairs, 426 based on Foata normal form. 0/643 useless extension candidates. Maximal degree in co-relation 1820. Up to 890 conditions per place. [2023-08-31 22:22:14,181 INFO L137 encePairwiseOnDemand]: 324/327 looper letters, 34 selfloop transitions, 2 changer transitions 0/38 dead transitions. [2023-08-31 22:22:14,181 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 38 transitions, 156 flow [2023-08-31 22:22:14,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:22:14,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:22:14,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 466 transitions. [2023-08-31 22:22:14,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4750254841997961 [2023-08-31 22:22:14,183 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 466 transitions. [2023-08-31 22:22:14,183 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 466 transitions. [2023-08-31 22:22:14,184 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:22:14,184 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 466 transitions. [2023-08-31 22:22:14,185 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 155.33333333333334) internal successors, (466), 3 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:14,186 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:14,187 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:14,187 INFO L175 Difference]: Start difference. First operand has 40 places, 39 transitions, 86 flow. Second operand 3 states and 466 transitions. [2023-08-31 22:22:14,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 38 transitions, 156 flow [2023-08-31 22:22:14,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 38 transitions, 152 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 22:22:14,189 INFO L231 Difference]: Finished difference. Result has 39 places, 38 transitions, 84 flow [2023-08-31 22:22:14,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, 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=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=39, PETRI_TRANSITIONS=38} [2023-08-31 22:22:14,189 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -9 predicate places. [2023-08-31 22:22:14,189 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 38 transitions, 84 flow [2023-08-31 22:22:14,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 144.25) internal successors, (577), 4 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:14,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:22:14,190 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-31 22:22:14,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-31 22:22:14,191 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:22:14,191 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:22:14,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1479137457, now seen corresponding path program 1 times [2023-08-31 22:22:14,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:22:14,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335621375] [2023-08-31 22:22:14,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:22:14,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:22:14,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:22:14,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:22:14,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:22:14,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335621375] [2023-08-31 22:22:14,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335621375] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:22:14,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:22:14,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 22:22:14,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461682892] [2023-08-31 22:22:14,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:22:14,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 22:22:14,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:22:14,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 22:22:14,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-31 22:22:14,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 327 [2023-08-31 22:22:14,412 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 38 transitions, 84 flow. Second operand has 5 states, 5 states have (on average 149.2) internal successors, (746), 5 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:14,412 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:22:14,412 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 327 [2023-08-31 22:22:14,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:22:14,596 INFO L130 PetriNetUnfolder]: 630/1056 cut-off events. [2023-08-31 22:22:14,597 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-31 22:22:14,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2098 conditions, 1056 events. 630/1056 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 4962 event pairs, 114 based on Foata normal form. 0/776 useless extension candidates. Maximal degree in co-relation 2094. Up to 669 conditions per place. [2023-08-31 22:22:14,601 INFO L137 encePairwiseOnDemand]: 321/327 looper letters, 70 selfloop transitions, 7 changer transitions 0/79 dead transitions. [2023-08-31 22:22:14,601 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 79 transitions, 326 flow [2023-08-31 22:22:14,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 22:22:14,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 22:22:14,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 818 transitions. [2023-08-31 22:22:14,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5003058103975535 [2023-08-31 22:22:14,604 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 818 transitions. [2023-08-31 22:22:14,604 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 818 transitions. [2023-08-31 22:22:14,605 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:22:14,605 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 818 transitions. [2023-08-31 22:22:14,606 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 163.6) internal successors, (818), 5 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:14,609 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 327.0) internal successors, (1962), 6 states have internal predecessors, (1962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:14,610 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 327.0) internal successors, (1962), 6 states have internal predecessors, (1962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:14,610 INFO L175 Difference]: Start difference. First operand has 39 places, 38 transitions, 84 flow. Second operand 5 states and 818 transitions. [2023-08-31 22:22:14,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 79 transitions, 326 flow [2023-08-31 22:22:14,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 79 transitions, 320 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 22:22:14,612 INFO L231 Difference]: Finished difference. Result has 40 places, 39 transitions, 96 flow [2023-08-31 22:22:14,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=96, PETRI_PLACES=40, PETRI_TRANSITIONS=39} [2023-08-31 22:22:14,613 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -8 predicate places. [2023-08-31 22:22:14,613 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 39 transitions, 96 flow [2023-08-31 22:22:14,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 149.2) internal successors, (746), 5 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:14,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:22:14,614 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-31 22:22:14,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-31 22:22:14,614 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:22:14,614 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:22:14,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1479137456, now seen corresponding path program 1 times [2023-08-31 22:22:14,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:22:14,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094455226] [2023-08-31 22:22:14,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:22:14,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:22:14,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:22:14,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:22:14,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:22:14,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094455226] [2023-08-31 22:22:14,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094455226] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:22:14,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:22:14,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 22:22:14,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533825692] [2023-08-31 22:22:14,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:22:14,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 22:22:14,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:22:14,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 22:22:14,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-31 22:22:14,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 327 [2023-08-31 22:22:14,957 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 39 transitions, 96 flow. Second operand has 5 states, 5 states have (on average 148.2) internal successors, (741), 5 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:14,957 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:22:14,957 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 327 [2023-08-31 22:22:14,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:22:15,169 INFO L130 PetriNetUnfolder]: 570/959 cut-off events. [2023-08-31 22:22:15,169 INFO L131 PetriNetUnfolder]: For 56/56 co-relation queries the response was YES. [2023-08-31 22:22:15,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2018 conditions, 959 events. 570/959 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 3672 event pairs, 195 based on Foata normal form. 16/775 useless extension candidates. Maximal degree in co-relation 2014. Up to 754 conditions per place. [2023-08-31 22:22:15,174 INFO L137 encePairwiseOnDemand]: 320/327 looper letters, 62 selfloop transitions, 4 changer transitions 0/68 dead transitions. [2023-08-31 22:22:15,174 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 68 transitions, 293 flow [2023-08-31 22:22:15,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 22:22:15,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 22:22:15,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 806 transitions. [2023-08-31 22:22:15,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4929663608562691 [2023-08-31 22:22:15,177 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 806 transitions. [2023-08-31 22:22:15,177 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 806 transitions. [2023-08-31 22:22:15,177 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:22:15,177 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 806 transitions. [2023-08-31 22:22:15,179 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 161.2) internal successors, (806), 5 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:15,181 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 327.0) internal successors, (1962), 6 states have internal predecessors, (1962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:15,181 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 327.0) internal successors, (1962), 6 states have internal predecessors, (1962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:15,182 INFO L175 Difference]: Start difference. First operand has 40 places, 39 transitions, 96 flow. Second operand 5 states and 806 transitions. [2023-08-31 22:22:15,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 68 transitions, 293 flow [2023-08-31 22:22:15,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 68 transitions, 285 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 22:22:15,185 INFO L231 Difference]: Finished difference. Result has 45 places, 41 transitions, 122 flow [2023-08-31 22:22:15,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=89, 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=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=122, PETRI_PLACES=45, PETRI_TRANSITIONS=41} [2023-08-31 22:22:15,186 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -3 predicate places. [2023-08-31 22:22:15,186 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 41 transitions, 122 flow [2023-08-31 22:22:15,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 148.2) internal successors, (741), 5 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:15,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:22:15,187 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:22:15,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-31 22:22:15,187 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:22:15,187 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:22:15,188 INFO L85 PathProgramCache]: Analyzing trace with hash -161798454, now seen corresponding path program 1 times [2023-08-31 22:22:15,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:22:15,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382241192] [2023-08-31 22:22:15,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:22:15,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:22:15,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:22:15,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:22:15,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:22:15,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382241192] [2023-08-31 22:22:15,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382241192] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:22:15,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:22:15,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 22:22:15,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119988381] [2023-08-31 22:22:15,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:22:15,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:22:15,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:22:15,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:22:15,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:22:15,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 327 [2023-08-31 22:22:15,253 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 41 transitions, 122 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) [2023-08-31 22:22:15,253 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:22:15,253 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 327 [2023-08-31 22:22:15,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:22:15,379 INFO L130 PetriNetUnfolder]: 615/1052 cut-off events. [2023-08-31 22:22:15,379 INFO L131 PetriNetUnfolder]: For 224/224 co-relation queries the response was YES. [2023-08-31 22:22:15,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2387 conditions, 1052 events. 615/1052 cut-off events. For 224/224 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 4589 event pairs, 276 based on Foata normal form. 0/868 useless extension candidates. Maximal degree in co-relation 2380. Up to 922 conditions per place. [2023-08-31 22:22:15,384 INFO L137 encePairwiseOnDemand]: 324/327 looper letters, 55 selfloop transitions, 3 changer transitions 0/60 dead transitions. [2023-08-31 22:22:15,385 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 60 transitions, 283 flow [2023-08-31 22:22:15,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:22:15,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:22:15,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 511 transitions. [2023-08-31 22:22:15,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5208970438328236 [2023-08-31 22:22:15,387 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 511 transitions. [2023-08-31 22:22:15,387 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 511 transitions. [2023-08-31 22:22:15,387 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:22:15,388 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 511 transitions. [2023-08-31 22:22:15,389 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 170.33333333333334) internal successors, (511), 3 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:15,390 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:15,390 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:15,391 INFO L175 Difference]: Start difference. First operand has 45 places, 41 transitions, 122 flow. Second operand 3 states and 511 transitions. [2023-08-31 22:22:15,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 60 transitions, 283 flow [2023-08-31 22:22:15,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 60 transitions, 279 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 22:22:15,393 INFO L231 Difference]: Finished difference. Result has 46 places, 42 transitions, 133 flow [2023-08-31 22:22:15,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=133, PETRI_PLACES=46, PETRI_TRANSITIONS=42} [2023-08-31 22:22:15,394 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -2 predicate places. [2023-08-31 22:22:15,394 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 42 transitions, 133 flow [2023-08-31 22:22:15,394 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) [2023-08-31 22:22:15,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:22:15,394 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:22:15,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-31 22:22:15,395 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:22:15,395 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:22:15,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1200004358, now seen corresponding path program 1 times [2023-08-31 22:22:15,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:22:15,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213094184] [2023-08-31 22:22:15,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:22:15,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:22:15,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:22:15,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:22:15,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:22:15,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213094184] [2023-08-31 22:22:15,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213094184] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:22:15,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:22:15,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 22:22:15,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766410821] [2023-08-31 22:22:15,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:22:15,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:22:15,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:22:15,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:22:15,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:22:15,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 327 [2023-08-31 22:22:15,431 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 42 transitions, 133 flow. Second operand has 3 states, 3 states have (on average 156.33333333333334) internal successors, (469), 3 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:15,431 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:22:15,431 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 327 [2023-08-31 22:22:15,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:22:15,550 INFO L130 PetriNetUnfolder]: 638/1077 cut-off events. [2023-08-31 22:22:15,551 INFO L131 PetriNetUnfolder]: For 372/372 co-relation queries the response was YES. [2023-08-31 22:22:15,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2645 conditions, 1077 events. 638/1077 cut-off events. For 372/372 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 4691 event pairs, 219 based on Foata normal form. 10/899 useless extension candidates. Maximal degree in co-relation 2637. Up to 861 conditions per place. [2023-08-31 22:22:15,556 INFO L137 encePairwiseOnDemand]: 324/327 looper letters, 58 selfloop transitions, 2 changer transitions 0/62 dead transitions. [2023-08-31 22:22:15,556 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 62 transitions, 302 flow [2023-08-31 22:22:15,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:22:15,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:22:15,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 516 transitions. [2023-08-31 22:22:15,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5259938837920489 [2023-08-31 22:22:15,558 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 516 transitions. [2023-08-31 22:22:15,558 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 516 transitions. [2023-08-31 22:22:15,559 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:22:15,559 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 516 transitions. [2023-08-31 22:22:15,560 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:15,561 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:15,562 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:15,562 INFO L175 Difference]: Start difference. First operand has 46 places, 42 transitions, 133 flow. Second operand 3 states and 516 transitions. [2023-08-31 22:22:15,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 62 transitions, 302 flow [2023-08-31 22:22:15,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 62 transitions, 298 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 22:22:15,565 INFO L231 Difference]: Finished difference. Result has 48 places, 42 transitions, 141 flow [2023-08-31 22:22:15,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=45, 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=141, PETRI_PLACES=48, PETRI_TRANSITIONS=42} [2023-08-31 22:22:15,566 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 0 predicate places. [2023-08-31 22:22:15,566 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 42 transitions, 141 flow [2023-08-31 22:22:15,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 156.33333333333334) internal successors, (469), 3 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:15,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:22:15,566 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:22:15,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-31 22:22:15,567 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:22:15,567 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:22:15,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1183384702, now seen corresponding path program 1 times [2023-08-31 22:22:15,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:22:15,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038475149] [2023-08-31 22:22:15,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:22:15,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:22:15,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:22:15,841 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:22:15,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:22:15,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038475149] [2023-08-31 22:22:15,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038475149] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 22:22:15,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761517286] [2023-08-31 22:22:15,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:22:15,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 22:22:15,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 22:22:15,845 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) [2023-08-31 22:22:15,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-31 22:22:15,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:22:15,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-31 22:22:15,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:22:16,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 22:22:16,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 22:22:16,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 22:22:16,065 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 [2023-08-31 22:22:16,246 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:22:16,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 22:22:16,400 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:22:16,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761517286] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 22:22:16,400 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 22:22:16,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 5] total 19 [2023-08-31 22:22:16,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555000817] [2023-08-31 22:22:16,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 22:22:16,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-31 22:22:16,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:22:16,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-31 22:22:16,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2023-08-31 22:22:17,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 327 [2023-08-31 22:22:17,667 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 42 transitions, 141 flow. Second operand has 21 states, 21 states have (on average 139.85714285714286) internal successors, (2937), 21 states have internal predecessors, (2937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:17,667 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:22:17,667 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 327 [2023-08-31 22:22:17,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:22:18,816 INFO L130 PetriNetUnfolder]: 1709/2796 cut-off events. [2023-08-31 22:22:18,817 INFO L131 PetriNetUnfolder]: For 890/890 co-relation queries the response was YES. [2023-08-31 22:22:18,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6989 conditions, 2796 events. 1709/2796 cut-off events. For 890/890 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 13219 event pairs, 169 based on Foata normal form. 66/2424 useless extension candidates. Maximal degree in co-relation 6980. Up to 1096 conditions per place. [2023-08-31 22:22:18,829 INFO L137 encePairwiseOnDemand]: 317/327 looper letters, 204 selfloop transitions, 22 changer transitions 0/226 dead transitions. [2023-08-31 22:22:18,830 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 226 transitions, 1075 flow [2023-08-31 22:22:18,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-31 22:22:18,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-31 22:22:18,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2166 transitions. [2023-08-31 22:22:18,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47313237221494103 [2023-08-31 22:22:18,836 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2166 transitions. [2023-08-31 22:22:18,836 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2166 transitions. [2023-08-31 22:22:18,837 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:22:18,837 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2166 transitions. [2023-08-31 22:22:18,841 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 154.71428571428572) internal successors, (2166), 14 states have internal predecessors, (2166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:18,846 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 327.0) internal successors, (4905), 15 states have internal predecessors, (4905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:18,847 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 327.0) internal successors, (4905), 15 states have internal predecessors, (4905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:18,847 INFO L175 Difference]: Start difference. First operand has 48 places, 42 transitions, 141 flow. Second operand 14 states and 2166 transitions. [2023-08-31 22:22:18,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 226 transitions, 1075 flow [2023-08-31 22:22:18,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 226 transitions, 1072 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 22:22:18,852 INFO L231 Difference]: Finished difference. Result has 67 places, 61 transitions, 308 flow [2023-08-31 22:22:18,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=308, PETRI_PLACES=67, PETRI_TRANSITIONS=61} [2023-08-31 22:22:18,853 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 19 predicate places. [2023-08-31 22:22:18,853 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 61 transitions, 308 flow [2023-08-31 22:22:18,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 139.85714285714286) internal successors, (2937), 21 states have internal predecessors, (2937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:18,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:22:18,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:22:18,863 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-31 22:22:19,060 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,SelfDestructingSolverStorable9 [2023-08-31 22:22:19,061 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:22:19,061 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:22:19,061 INFO L85 PathProgramCache]: Analyzing trace with hash 705944842, now seen corresponding path program 1 times [2023-08-31 22:22:19,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:22:19,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271152749] [2023-08-31 22:22:19,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:22:19,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:22:19,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:22:19,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:22:19,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:22:19,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271152749] [2023-08-31 22:22:19,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271152749] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:22:19,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:22:19,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 22:22:19,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403895045] [2023-08-31 22:22:19,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:22:19,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:22:19,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:22:19,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:22:19,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:22:19,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 327 [2023-08-31 22:22:19,151 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 61 transitions, 308 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) [2023-08-31 22:22:19,151 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:22:19,151 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 327 [2023-08-31 22:22:19,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:22:19,283 INFO L130 PetriNetUnfolder]: 487/940 cut-off events. [2023-08-31 22:22:19,283 INFO L131 PetriNetUnfolder]: For 896/896 co-relation queries the response was YES. [2023-08-31 22:22:19,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2681 conditions, 940 events. 487/940 cut-off events. For 896/896 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 4019 event pairs, 73 based on Foata normal form. 42/912 useless extension candidates. Maximal degree in co-relation 2665. Up to 682 conditions per place. [2023-08-31 22:22:19,288 INFO L137 encePairwiseOnDemand]: 322/327 looper letters, 48 selfloop transitions, 10 changer transitions 0/62 dead transitions. [2023-08-31 22:22:19,288 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 62 transitions, 406 flow [2023-08-31 22:22:19,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:22:19,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:22:19,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 496 transitions. [2023-08-31 22:22:19,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5056065239551478 [2023-08-31 22:22:19,294 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 496 transitions. [2023-08-31 22:22:19,294 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 496 transitions. [2023-08-31 22:22:19,294 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:22:19,294 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 496 transitions. [2023-08-31 22:22:19,295 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 165.33333333333334) internal successors, (496), 3 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:19,297 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:19,297 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:19,297 INFO L175 Difference]: Start difference. First operand has 67 places, 61 transitions, 308 flow. Second operand 3 states and 496 transitions. [2023-08-31 22:22:19,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 62 transitions, 406 flow [2023-08-31 22:22:19,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 62 transitions, 374 flow, removed 12 selfloop flow, removed 4 redundant places. [2023-08-31 22:22:19,304 INFO L231 Difference]: Finished difference. Result has 63 places, 53 transitions, 254 flow [2023-08-31 22:22:19,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=254, PETRI_PLACES=63, PETRI_TRANSITIONS=53} [2023-08-31 22:22:19,304 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 15 predicate places. [2023-08-31 22:22:19,305 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 53 transitions, 254 flow [2023-08-31 22:22:19,305 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) [2023-08-31 22:22:19,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:22:19,306 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:22:19,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-31 22:22:19,306 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:22:19,306 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:22:19,306 INFO L85 PathProgramCache]: Analyzing trace with hash -190660559, now seen corresponding path program 1 times [2023-08-31 22:22:19,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:22:19,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999914653] [2023-08-31 22:22:19,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:22:19,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:22:19,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:22:19,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:22:19,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:22:19,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999914653] [2023-08-31 22:22:19,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999914653] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:22:19,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:22:19,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-08-31 22:22:19,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305374053] [2023-08-31 22:22:19,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:22:19,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-31 22:22:19,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:22:19,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-31 22:22:19,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-08-31 22:22:20,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 327 [2023-08-31 22:22:20,462 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 53 transitions, 254 flow. Second operand has 13 states, 13 states have (on average 131.46153846153845) internal successors, (1709), 13 states have internal predecessors, (1709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:20,462 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:22:20,462 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 327 [2023-08-31 22:22:20,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:22:21,136 INFO L130 PetriNetUnfolder]: 695/1286 cut-off events. [2023-08-31 22:22:21,136 INFO L131 PetriNetUnfolder]: For 527/527 co-relation queries the response was YES. [2023-08-31 22:22:21,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3592 conditions, 1286 events. 695/1286 cut-off events. For 527/527 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 5603 event pairs, 103 based on Foata normal form. 12/1272 useless extension candidates. Maximal degree in co-relation 3576. Up to 672 conditions per place. [2023-08-31 22:22:21,143 INFO L137 encePairwiseOnDemand]: 312/327 looper letters, 138 selfloop transitions, 17 changer transitions 0/155 dead transitions. [2023-08-31 22:22:21,143 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 155 transitions, 894 flow [2023-08-31 22:22:21,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-31 22:22:21,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-31 22:22:21,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1842 transitions. [2023-08-31 22:22:21,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43330980945659847 [2023-08-31 22:22:21,149 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1842 transitions. [2023-08-31 22:22:21,149 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1842 transitions. [2023-08-31 22:22:21,150 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:22:21,150 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1842 transitions. [2023-08-31 22:22:21,154 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 141.69230769230768) internal successors, (1842), 13 states have internal predecessors, (1842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:21,158 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 327.0) internal successors, (4578), 14 states have internal predecessors, (4578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:21,159 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 327.0) internal successors, (4578), 14 states have internal predecessors, (4578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:21,160 INFO L175 Difference]: Start difference. First operand has 63 places, 53 transitions, 254 flow. Second operand 13 states and 1842 transitions. [2023-08-31 22:22:21,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 155 transitions, 894 flow [2023-08-31 22:22:21,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 155 transitions, 872 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-31 22:22:21,165 INFO L231 Difference]: Finished difference. Result has 80 places, 63 transitions, 360 flow [2023-08-31 22:22:21,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=360, PETRI_PLACES=80, PETRI_TRANSITIONS=63} [2023-08-31 22:22:21,167 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 32 predicate places. [2023-08-31 22:22:21,167 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 63 transitions, 360 flow [2023-08-31 22:22:21,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 131.46153846153845) internal successors, (1709), 13 states have internal predecessors, (1709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:21,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:22:21,168 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:22:21,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-31 22:22:21,169 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:22:21,169 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:22:21,169 INFO L85 PathProgramCache]: Analyzing trace with hash -891010450, now seen corresponding path program 1 times [2023-08-31 22:22:21,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:22:21,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565756395] [2023-08-31 22:22:21,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:22:21,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:22:21,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:22:21,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:22:21,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:22:21,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565756395] [2023-08-31 22:22:21,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565756395] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:22:21,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:22:21,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-31 22:22:21,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657502407] [2023-08-31 22:22:21,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:22:21,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 22:22:21,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:22:21,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 22:22:21,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-08-31 22:22:21,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 327 [2023-08-31 22:22:21,475 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 63 transitions, 360 flow. Second operand has 7 states, 7 states have (on average 146.57142857142858) internal successors, (1026), 7 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:21,475 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:22:21,475 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 327 [2023-08-31 22:22:21,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:22:21,745 INFO L130 PetriNetUnfolder]: 763/1464 cut-off events. [2023-08-31 22:22:21,746 INFO L131 PetriNetUnfolder]: For 1111/1111 co-relation queries the response was YES. [2023-08-31 22:22:21,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4428 conditions, 1464 events. 763/1464 cut-off events. For 1111/1111 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 6962 event pairs, 81 based on Foata normal form. 0/1406 useless extension candidates. Maximal degree in co-relation 4405. Up to 656 conditions per place. [2023-08-31 22:22:21,754 INFO L137 encePairwiseOnDemand]: 318/327 looper letters, 77 selfloop transitions, 25 changer transitions 0/106 dead transitions. [2023-08-31 22:22:21,754 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 106 transitions, 743 flow [2023-08-31 22:22:21,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-31 22:22:21,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-31 22:22:21,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1371 transitions. [2023-08-31 22:22:21,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4658511722731906 [2023-08-31 22:22:21,759 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1371 transitions. [2023-08-31 22:22:21,759 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1371 transitions. [2023-08-31 22:22:21,760 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:22:21,760 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1371 transitions. [2023-08-31 22:22:21,762 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 152.33333333333334) internal successors, (1371), 9 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:21,766 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 327.0) internal successors, (3270), 10 states have internal predecessors, (3270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:21,778 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 327.0) internal successors, (3270), 10 states have internal predecessors, (3270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:21,779 INFO L175 Difference]: Start difference. First operand has 80 places, 63 transitions, 360 flow. Second operand 9 states and 1371 transitions. [2023-08-31 22:22:21,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 106 transitions, 743 flow [2023-08-31 22:22:21,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 106 transitions, 727 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-08-31 22:22:21,788 INFO L231 Difference]: Finished difference. Result has 85 places, 72 transitions, 482 flow [2023-08-31 22:22:21,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=482, PETRI_PLACES=85, PETRI_TRANSITIONS=72} [2023-08-31 22:22:21,789 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 37 predicate places. [2023-08-31 22:22:21,789 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 72 transitions, 482 flow [2023-08-31 22:22:21,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 146.57142857142858) internal successors, (1026), 7 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:21,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:22:21,791 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:22:21,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-31 22:22:21,791 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:22:21,791 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:22:21,791 INFO L85 PathProgramCache]: Analyzing trace with hash -72479684, now seen corresponding path program 1 times [2023-08-31 22:22:21,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:22:21,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925158218] [2023-08-31 22:22:21,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:22:21,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:22:21,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:22:21,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 22:22:21,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:22:21,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925158218] [2023-08-31 22:22:21,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925158218] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:22:21,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:22:21,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 22:22:21,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144320050] [2023-08-31 22:22:21,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:22:21,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:22:21,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:22:21,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:22:21,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:22:21,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 327 [2023-08-31 22:22:21,847 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 72 transitions, 482 flow. Second operand has 3 states, 3 states have (on average 158.33333333333334) internal successors, (475), 3 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:21,847 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:22:21,847 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 327 [2023-08-31 22:22:21,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:22:22,086 INFO L130 PetriNetUnfolder]: 987/1898 cut-off events. [2023-08-31 22:22:22,086 INFO L131 PetriNetUnfolder]: For 2198/2202 co-relation queries the response was YES. [2023-08-31 22:22:22,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6059 conditions, 1898 events. 987/1898 cut-off events. For 2198/2202 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 9777 event pairs, 573 based on Foata normal form. 70/1886 useless extension candidates. Maximal degree in co-relation 6033. Up to 1351 conditions per place. [2023-08-31 22:22:22,097 INFO L137 encePairwiseOnDemand]: 323/327 looper letters, 110 selfloop transitions, 3 changer transitions 0/117 dead transitions. [2023-08-31 22:22:22,097 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 117 transitions, 1007 flow [2023-08-31 22:22:22,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:22:22,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:22:22,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 517 transitions. [2023-08-31 22:22:22,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.527013251783894 [2023-08-31 22:22:22,099 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 517 transitions. [2023-08-31 22:22:22,099 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 517 transitions. [2023-08-31 22:22:22,099 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:22:22,100 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 517 transitions. [2023-08-31 22:22:22,100 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 172.33333333333334) internal successors, (517), 3 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:22,102 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:22,102 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:22,102 INFO L175 Difference]: Start difference. First operand has 85 places, 72 transitions, 482 flow. Second operand 3 states and 517 transitions. [2023-08-31 22:22:22,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 117 transitions, 1007 flow [2023-08-31 22:22:22,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 117 transitions, 925 flow, removed 12 selfloop flow, removed 4 redundant places. [2023-08-31 22:22:22,113 INFO L231 Difference]: Finished difference. Result has 84 places, 74 transitions, 449 flow [2023-08-31 22:22:22,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=428, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=449, PETRI_PLACES=84, PETRI_TRANSITIONS=74} [2023-08-31 22:22:22,114 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 36 predicate places. [2023-08-31 22:22:22,114 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 74 transitions, 449 flow [2023-08-31 22:22:22,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 158.33333333333334) internal successors, (475), 3 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:22,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:22:22,114 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-08-31 22:22:22,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-31 22:22:22,114 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:22:22,115 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:22:22,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1459253539, now seen corresponding path program 1 times [2023-08-31 22:22:22,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:22:22,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911817723] [2023-08-31 22:22:22,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:22:22,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:22:22,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:22:22,271 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:22:22,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:22:22,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911817723] [2023-08-31 22:22:22,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911817723] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 22:22:22,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516895165] [2023-08-31 22:22:22,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:22:22,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 22:22:22,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 22:22:22,273 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) [2023-08-31 22:22:22,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-31 22:22:22,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:22:22,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 22:22:22,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:22:22,435 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:22:22,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 22:22:22,485 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:22:22,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516895165] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 22:22:22,486 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 22:22:22,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2023-08-31 22:22:22,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488746064] [2023-08-31 22:22:22,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 22:22:22,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-31 22:22:22,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:22:22,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-31 22:22:22,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2023-08-31 22:22:22,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 327 [2023-08-31 22:22:22,551 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 74 transitions, 449 flow. Second operand has 15 states, 15 states have (on average 145.33333333333334) internal successors, (2180), 15 states have internal predecessors, (2180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:22,551 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:22:22,551 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 327 [2023-08-31 22:22:22,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:22:23,298 INFO L130 PetriNetUnfolder]: 2081/3874 cut-off events. [2023-08-31 22:22:23,298 INFO L131 PetriNetUnfolder]: For 3811/3811 co-relation queries the response was YES. [2023-08-31 22:22:23,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12516 conditions, 3874 events. 2081/3874 cut-off events. For 3811/3811 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 20117 event pairs, 473 based on Foata normal form. 96/3952 useless extension candidates. Maximal degree in co-relation 12489. Up to 989 conditions per place. [2023-08-31 22:22:23,322 INFO L137 encePairwiseOnDemand]: 316/327 looper letters, 226 selfloop transitions, 52 changer transitions 0/278 dead transitions. [2023-08-31 22:22:23,322 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 278 transitions, 2002 flow [2023-08-31 22:22:23,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-31 22:22:23,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-31 22:22:23,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2488 transitions. [2023-08-31 22:22:23,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47553516819571867 [2023-08-31 22:22:23,365 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2488 transitions. [2023-08-31 22:22:23,365 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2488 transitions. [2023-08-31 22:22:23,366 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:22:23,366 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2488 transitions. [2023-08-31 22:22:23,370 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 155.5) internal successors, (2488), 16 states have internal predecessors, (2488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:23,376 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 327.0) internal successors, (5559), 17 states have internal predecessors, (5559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:23,377 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 327.0) internal successors, (5559), 17 states have internal predecessors, (5559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:23,377 INFO L175 Difference]: Start difference. First operand has 84 places, 74 transitions, 449 flow. Second operand 16 states and 2488 transitions. [2023-08-31 22:22:23,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 278 transitions, 2002 flow [2023-08-31 22:22:23,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 278 transitions, 1986 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 22:22:23,393 INFO L231 Difference]: Finished difference. Result has 108 places, 114 transitions, 959 flow [2023-08-31 22:22:23,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=431, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=959, PETRI_PLACES=108, PETRI_TRANSITIONS=114} [2023-08-31 22:22:23,394 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 60 predicate places. [2023-08-31 22:22:23,394 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 114 transitions, 959 flow [2023-08-31 22:22:23,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 145.33333333333334) internal successors, (2180), 15 states have internal predecessors, (2180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:23,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:22:23,395 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] [2023-08-31 22:22:23,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-31 22:22:23,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-31 22:22:23,601 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:22:23,601 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:22:23,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1566742044, now seen corresponding path program 1 times [2023-08-31 22:22:23,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:22:23,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469710144] [2023-08-31 22:22:23,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:22:23,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:22:23,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:22:24,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:22:24,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:22:24,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469710144] [2023-08-31 22:22:24,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469710144] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:22:24,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:22:24,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-08-31 22:22:24,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306072548] [2023-08-31 22:22:24,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:22:24,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-31 22:22:24,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:22:24,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-31 22:22:24,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-08-31 22:22:24,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 327 [2023-08-31 22:22:24,550 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 114 transitions, 959 flow. Second operand has 11 states, 11 states have (on average 136.8181818181818) internal successors, (1505), 11 states have internal predecessors, (1505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:24,550 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:22:24,550 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 327 [2023-08-31 22:22:24,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:22:25,618 INFO L130 PetriNetUnfolder]: 2294/4458 cut-off events. [2023-08-31 22:22:25,618 INFO L131 PetriNetUnfolder]: For 9348/9348 co-relation queries the response was YES. [2023-08-31 22:22:25,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16303 conditions, 4458 events. 2294/4458 cut-off events. For 9348/9348 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 25662 event pairs, 748 based on Foata normal form. 18/4440 useless extension candidates. Maximal degree in co-relation 16266. Up to 3174 conditions per place. [2023-08-31 22:22:25,644 INFO L137 encePairwiseOnDemand]: 317/327 looper letters, 169 selfloop transitions, 14 changer transitions 0/199 dead transitions. [2023-08-31 22:22:25,644 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 199 transitions, 1773 flow [2023-08-31 22:22:25,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-31 22:22:25,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-31 22:22:25,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1326 transitions. [2023-08-31 22:22:25,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4505606523955148 [2023-08-31 22:22:25,652 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1326 transitions. [2023-08-31 22:22:25,652 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1326 transitions. [2023-08-31 22:22:25,653 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:22:25,653 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1326 transitions. [2023-08-31 22:22:25,656 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 147.33333333333334) internal successors, (1326), 9 states have internal predecessors, (1326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:25,660 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 327.0) internal successors, (3270), 10 states have internal predecessors, (3270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:25,660 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 327.0) internal successors, (3270), 10 states have internal predecessors, (3270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:25,660 INFO L175 Difference]: Start difference. First operand has 108 places, 114 transitions, 959 flow. Second operand 9 states and 1326 transitions. [2023-08-31 22:22:25,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 199 transitions, 1773 flow [2023-08-31 22:22:25,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 199 transitions, 1647 flow, removed 60 selfloop flow, removed 2 redundant places. [2023-08-31 22:22:25,699 INFO L231 Difference]: Finished difference. Result has 118 places, 124 transitions, 980 flow [2023-08-31 22:22:25,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=853, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=980, PETRI_PLACES=118, PETRI_TRANSITIONS=124} [2023-08-31 22:22:25,701 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 70 predicate places. [2023-08-31 22:22:25,701 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 124 transitions, 980 flow [2023-08-31 22:22:25,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 136.8181818181818) internal successors, (1505), 11 states have internal predecessors, (1505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:25,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:22:25,702 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] [2023-08-31 22:22:25,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-31 22:22:25,702 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:22:25,702 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:22:25,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1121809114, now seen corresponding path program 2 times [2023-08-31 22:22:25,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:22:25,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381890842] [2023-08-31 22:22:25,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:22:25,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:22:25,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:22:26,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:22:26,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:22:26,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381890842] [2023-08-31 22:22:26,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381890842] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:22:26,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:22:26,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-08-31 22:22:26,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587822116] [2023-08-31 22:22:26,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:22:26,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-31 22:22:26,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:22:26,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-31 22:22:26,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-08-31 22:22:26,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 327 [2023-08-31 22:22:26,687 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 124 transitions, 980 flow. Second operand has 11 states, 11 states have (on average 136.8181818181818) internal successors, (1505), 11 states have internal predecessors, (1505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:26,688 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:22:26,688 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 327 [2023-08-31 22:22:26,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:22:27,633 INFO L130 PetriNetUnfolder]: 2480/4820 cut-off events. [2023-08-31 22:22:27,633 INFO L131 PetriNetUnfolder]: For 8623/8623 co-relation queries the response was YES. [2023-08-31 22:22:27,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17221 conditions, 4820 events. 2480/4820 cut-off events. For 8623/8623 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 28362 event pairs, 718 based on Foata normal form. 12/4794 useless extension candidates. Maximal degree in co-relation 17181. Up to 2760 conditions per place. [2023-08-31 22:22:27,665 INFO L137 encePairwiseOnDemand]: 317/327 looper letters, 157 selfloop transitions, 24 changer transitions 0/197 dead transitions. [2023-08-31 22:22:27,665 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 197 transitions, 1702 flow [2023-08-31 22:22:27,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-31 22:22:27,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-31 22:22:27,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1596 transitions. [2023-08-31 22:22:27,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44370308590492075 [2023-08-31 22:22:27,674 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1596 transitions. [2023-08-31 22:22:27,674 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1596 transitions. [2023-08-31 22:22:27,677 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:22:27,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1596 transitions. [2023-08-31 22:22:27,681 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 145.0909090909091) internal successors, (1596), 11 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:27,686 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 327.0) internal successors, (3924), 12 states have internal predecessors, (3924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:27,687 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 327.0) internal successors, (3924), 12 states have internal predecessors, (3924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:27,687 INFO L175 Difference]: Start difference. First operand has 118 places, 124 transitions, 980 flow. Second operand 11 states and 1596 transitions. [2023-08-31 22:22:27,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 197 transitions, 1702 flow [2023-08-31 22:22:27,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 197 transitions, 1676 flow, removed 7 selfloop flow, removed 4 redundant places. [2023-08-31 22:22:27,724 INFO L231 Difference]: Finished difference. Result has 127 places, 133 transitions, 1116 flow [2023-08-31 22:22:27,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=958, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1116, PETRI_PLACES=127, PETRI_TRANSITIONS=133} [2023-08-31 22:22:27,725 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 79 predicate places. [2023-08-31 22:22:27,725 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 133 transitions, 1116 flow [2023-08-31 22:22:27,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 136.8181818181818) internal successors, (1505), 11 states have internal predecessors, (1505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:27,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:22:27,726 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] [2023-08-31 22:22:27,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-31 22:22:27,726 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:22:27,726 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:22:27,727 INFO L85 PathProgramCache]: Analyzing trace with hash 36144378, now seen corresponding path program 1 times [2023-08-31 22:22:27,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:22:27,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227072479] [2023-08-31 22:22:27,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:22:27,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:22:27,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:22:27,781 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 22:22:27,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:22:27,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227072479] [2023-08-31 22:22:27,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227072479] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 22:22:27,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794356799] [2023-08-31 22:22:27,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:22:27,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 22:22:27,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 22:22:27,784 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) [2023-08-31 22:22:27,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-31 22:22:27,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:22:27,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-31 22:22:27,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:22:27,915 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 22:22:27,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 22:22:27,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 22:22:27,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794356799] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 22:22:27,930 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 22:22:27,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-08-31 22:22:27,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353734857] [2023-08-31 22:22:27,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 22:22:27,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 22:22:27,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:22:27,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 22:22:27,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-31 22:22:27,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 327 [2023-08-31 22:22:27,944 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 133 transitions, 1116 flow. Second operand has 7 states, 7 states have (on average 155.28571428571428) internal successors, (1087), 7 states have internal predecessors, (1087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:27,944 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:22:27,945 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 327 [2023-08-31 22:22:27,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:22:29,017 INFO L130 PetriNetUnfolder]: 4522/9156 cut-off events. [2023-08-31 22:22:29,017 INFO L131 PetriNetUnfolder]: For 18790/18790 co-relation queries the response was YES. [2023-08-31 22:22:29,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33205 conditions, 9156 events. 4522/9156 cut-off events. For 18790/18790 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 64662 event pairs, 1602 based on Foata normal form. 1236/10338 useless extension candidates. Maximal degree in co-relation 33162. Up to 2382 conditions per place. [2023-08-31 22:22:29,124 INFO L137 encePairwiseOnDemand]: 322/327 looper letters, 403 selfloop transitions, 18 changer transitions 0/437 dead transitions. [2023-08-31 22:22:29,124 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 437 transitions, 4638 flow [2023-08-31 22:22:29,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 22:22:29,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 22:22:29,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1036 transitions. [2023-08-31 22:22:29,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.528032619775739 [2023-08-31 22:22:29,133 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1036 transitions. [2023-08-31 22:22:29,134 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1036 transitions. [2023-08-31 22:22:29,134 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:22:29,134 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1036 transitions. [2023-08-31 22:22:29,136 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 172.66666666666666) internal successors, (1036), 6 states have internal predecessors, (1036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:29,138 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 327.0) internal successors, (2289), 7 states have internal predecessors, (2289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:29,139 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 327.0) internal successors, (2289), 7 states have internal predecessors, (2289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:29,139 INFO L175 Difference]: Start difference. First operand has 127 places, 133 transitions, 1116 flow. Second operand 6 states and 1036 transitions. [2023-08-31 22:22:29,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 437 transitions, 4638 flow [2023-08-31 22:22:29,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 437 transitions, 4548 flow, removed 14 selfloop flow, removed 5 redundant places. [2023-08-31 22:22:29,223 INFO L231 Difference]: Finished difference. Result has 131 places, 142 transitions, 1237 flow [2023-08-31 22:22:29,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=1087, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1237, PETRI_PLACES=131, PETRI_TRANSITIONS=142} [2023-08-31 22:22:29,223 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 83 predicate places. [2023-08-31 22:22:29,223 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 142 transitions, 1237 flow [2023-08-31 22:22:29,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 155.28571428571428) internal successors, (1087), 7 states have internal predecessors, (1087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:29,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:22:29,224 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:22:29,230 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-31 22:22:29,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-31 22:22:29,430 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:22:29,430 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:22:29,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1549751406, now seen corresponding path program 1 times [2023-08-31 22:22:29,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:22:29,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377952337] [2023-08-31 22:22:29,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:22:29,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:22:29,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:22:29,470 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-31 22:22:29,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:22:29,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377952337] [2023-08-31 22:22:29,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377952337] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:22:29,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:22:29,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 22:22:29,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816080601] [2023-08-31 22:22:29,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:22:29,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:22:29,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:22:29,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:22:29,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:22:29,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 327 [2023-08-31 22:22:29,487 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 142 transitions, 1237 flow. Second operand has 3 states, 3 states have (on average 154.33333333333334) internal successors, (463), 3 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:29,487 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:22:29,487 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 327 [2023-08-31 22:22:29,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:22:30,650 INFO L130 PetriNetUnfolder]: 4408/8841 cut-off events. [2023-08-31 22:22:30,650 INFO L131 PetriNetUnfolder]: For 24434/24434 co-relation queries the response was YES. [2023-08-31 22:22:30,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34965 conditions, 8841 events. 4408/8841 cut-off events. For 24434/24434 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 60323 event pairs, 2471 based on Foata normal form. 288/9075 useless extension candidates. Maximal degree in co-relation 34919. Up to 5923 conditions per place. [2023-08-31 22:22:30,698 INFO L137 encePairwiseOnDemand]: 321/327 looper letters, 125 selfloop transitions, 17 changer transitions 0/150 dead transitions. [2023-08-31 22:22:30,698 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 150 transitions, 1558 flow [2023-08-31 22:22:30,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:22:30,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:22:30,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 503 transitions. [2023-08-31 22:22:30,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5127420998980632 [2023-08-31 22:22:30,700 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 503 transitions. [2023-08-31 22:22:30,700 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 503 transitions. [2023-08-31 22:22:30,700 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:22:30,700 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 503 transitions. [2023-08-31 22:22:30,701 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) [2023-08-31 22:22:30,702 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:30,703 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:30,703 INFO L175 Difference]: Start difference. First operand has 131 places, 142 transitions, 1237 flow. Second operand 3 states and 503 transitions. [2023-08-31 22:22:30,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 150 transitions, 1558 flow [2023-08-31 22:22:30,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 150 transitions, 1496 flow, removed 22 selfloop flow, removed 6 redundant places. [2023-08-31 22:22:30,767 INFO L231 Difference]: Finished difference. Result has 129 places, 127 transitions, 1149 flow [2023-08-31 22:22:30,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=1002, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1149, PETRI_PLACES=129, PETRI_TRANSITIONS=127} [2023-08-31 22:22:30,768 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 81 predicate places. [2023-08-31 22:22:30,768 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 127 transitions, 1149 flow [2023-08-31 22:22:30,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 154.33333333333334) internal successors, (463), 3 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:30,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:22:30,769 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] [2023-08-31 22:22:30,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-31 22:22:30,769 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:22:30,769 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:22:30,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1400322095, now seen corresponding path program 1 times [2023-08-31 22:22:30,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:22:30,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774933829] [2023-08-31 22:22:30,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:22:30,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:22:30,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:22:30,851 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:22:30,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:22:30,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774933829] [2023-08-31 22:22:30,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774933829] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 22:22:30,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459872696] [2023-08-31 22:22:30,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:22:30,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 22:22:30,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 22:22:30,853 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) [2023-08-31 22:22:30,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-31 22:22:30,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:22:30,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 22:22:30,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:22:30,991 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 22:22:30,992 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 22:22:30,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459872696] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:22:30,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-31 22:22:30,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2023-08-31 22:22:30,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015228859] [2023-08-31 22:22:30,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:22:30,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-31 22:22:30,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:22:30,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-31 22:22:30,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-08-31 22:22:31,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 327 [2023-08-31 22:22:31,028 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 127 transitions, 1149 flow. Second operand has 6 states, 6 states have (on average 146.83333333333334) internal successors, (881), 6 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:31,028 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:22:31,028 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 327 [2023-08-31 22:22:31,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:22:32,160 INFO L130 PetriNetUnfolder]: 4023/7961 cut-off events. [2023-08-31 22:22:32,160 INFO L131 PetriNetUnfolder]: For 25246/25246 co-relation queries the response was YES. [2023-08-31 22:22:32,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31958 conditions, 7961 events. 4023/7961 cut-off events. For 25246/25246 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 51797 event pairs, 1253 based on Foata normal form. 66/8001 useless extension candidates. Maximal degree in co-relation 31913. Up to 4162 conditions per place. [2023-08-31 22:22:32,210 INFO L137 encePairwiseOnDemand]: 319/327 looper letters, 168 selfloop transitions, 24 changer transitions 0/192 dead transitions. [2023-08-31 22:22:32,210 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 192 transitions, 1911 flow [2023-08-31 22:22:32,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 22:22:32,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 22:22:32,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 953 transitions. [2023-08-31 22:22:32,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4857288481141692 [2023-08-31 22:22:32,213 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 953 transitions. [2023-08-31 22:22:32,213 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 953 transitions. [2023-08-31 22:22:32,213 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:22:32,213 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 953 transitions. [2023-08-31 22:22:32,215 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 158.83333333333334) internal successors, (953), 6 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:32,218 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 327.0) internal successors, (2289), 7 states have internal predecessors, (2289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:32,218 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 327.0) internal successors, (2289), 7 states have internal predecessors, (2289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:32,218 INFO L175 Difference]: Start difference. First operand has 129 places, 127 transitions, 1149 flow. Second operand 6 states and 953 transitions. [2023-08-31 22:22:32,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 192 transitions, 1911 flow [2023-08-31 22:22:32,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 192 transitions, 1861 flow, removed 8 selfloop flow, removed 3 redundant places. [2023-08-31 22:22:32,305 INFO L231 Difference]: Finished difference. Result has 133 places, 127 transitions, 1180 flow [2023-08-31 22:22:32,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=1025, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1180, PETRI_PLACES=133, PETRI_TRANSITIONS=127} [2023-08-31 22:22:32,306 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 85 predicate places. [2023-08-31 22:22:32,306 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 127 transitions, 1180 flow [2023-08-31 22:22:32,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 146.83333333333334) internal successors, (881), 6 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:32,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:22:32,307 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] [2023-08-31 22:22:32,315 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-31 22:22:32,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 22:22:32,515 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:22:32,516 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:22:32,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1400323650, now seen corresponding path program 1 times [2023-08-31 22:22:32,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:22:32,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320616520] [2023-08-31 22:22:32,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:22:32,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:22:32,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:22:32,812 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:22:32,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:22:32,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320616520] [2023-08-31 22:22:32,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320616520] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 22:22:32,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165709166] [2023-08-31 22:22:32,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:22:32,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 22:22:32,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 22:22:32,815 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) [2023-08-31 22:22:32,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-31 22:22:32,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:22:32,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-31 22:22:32,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:22:33,378 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:22:33,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 22:22:33,679 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 22:22:33,680 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 35 treesize of output 39 [2023-08-31 22:22:33,837 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:22:33,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165709166] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 22:22:33,837 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 22:22:33,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 12] total 33 [2023-08-31 22:22:33,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977628792] [2023-08-31 22:22:33,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 22:22:33,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-31 22:22:33,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:22:33,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-31 22:22:33,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1059, Unknown=0, NotChecked=0, Total=1190 [2023-08-31 22:22:36,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 327 [2023-08-31 22:22:36,145 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 127 transitions, 1180 flow. Second operand has 35 states, 35 states have (on average 130.05714285714285) internal successors, (4552), 35 states have internal predecessors, (4552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:36,145 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:22:36,146 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 327 [2023-08-31 22:22:36,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:22:39,663 INFO L130 PetriNetUnfolder]: 4563/8995 cut-off events. [2023-08-31 22:22:39,663 INFO L131 PetriNetUnfolder]: For 27869/27869 co-relation queries the response was YES. [2023-08-31 22:22:39,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36488 conditions, 8995 events. 4563/8995 cut-off events. For 27869/27869 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 60358 event pairs, 476 based on Foata normal form. 124/9083 useless extension candidates. Maximal degree in co-relation 36441. Up to 2686 conditions per place. [2023-08-31 22:22:39,705 INFO L137 encePairwiseOnDemand]: 312/327 looper letters, 228 selfloop transitions, 113 changer transitions 0/341 dead transitions. [2023-08-31 22:22:39,705 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 341 transitions, 3043 flow [2023-08-31 22:22:39,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-31 22:22:39,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-31 22:22:39,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 4719 transitions. [2023-08-31 22:22:39,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41231979030144167 [2023-08-31 22:22:39,711 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 4719 transitions. [2023-08-31 22:22:39,711 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 4719 transitions. [2023-08-31 22:22:39,713 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:22:39,713 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 4719 transitions. [2023-08-31 22:22:39,719 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 134.82857142857142) internal successors, (4719), 35 states have internal predecessors, (4719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:39,730 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 327.0) internal successors, (11772), 36 states have internal predecessors, (11772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:39,733 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 327.0) internal successors, (11772), 36 states have internal predecessors, (11772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:39,733 INFO L175 Difference]: Start difference. First operand has 133 places, 127 transitions, 1180 flow. Second operand 35 states and 4719 transitions. [2023-08-31 22:22:39,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 341 transitions, 3043 flow [2023-08-31 22:22:39,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 341 transitions, 3029 flow, removed 7 selfloop flow, removed 0 redundant places. [2023-08-31 22:22:39,807 INFO L231 Difference]: Finished difference. Result has 167 places, 162 transitions, 1734 flow [2023-08-31 22:22:39,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=1166, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=1734, PETRI_PLACES=167, PETRI_TRANSITIONS=162} [2023-08-31 22:22:39,808 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 119 predicate places. [2023-08-31 22:22:39,808 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 162 transitions, 1734 flow [2023-08-31 22:22:39,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 130.05714285714285) internal successors, (4552), 35 states have internal predecessors, (4552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:39,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:22:39,809 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1] [2023-08-31 22:22:39,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-31 22:22:40,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 22:22:40,015 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:22:40,015 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:22:40,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1366491074, now seen corresponding path program 2 times [2023-08-31 22:22:40,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:22:40,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272908451] [2023-08-31 22:22:40,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:22:40,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:22:40,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:22:40,904 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:22:40,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:22:40,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272908451] [2023-08-31 22:22:40,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272908451] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 22:22:40,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696110501] [2023-08-31 22:22:40,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 22:22:40,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 22:22:40,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 22:22:40,906 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 22:22:40,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-31 22:22:41,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 22:22:41,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 22:22:41,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 48 conjunts are in the unsatisfiable core [2023-08-31 22:22:41,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:22:41,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 22:22:41,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 22:22:41,070 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-31 22:22:41,070 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 [2023-08-31 22:22:41,092 INFO L321 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2023-08-31 22:22:41,093 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 [2023-08-31 22:22:41,564 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:22:41,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 22:22:41,972 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:22:41,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696110501] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 22:22:41,972 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 22:22:41,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 10, 9] total 40 [2023-08-31 22:22:41,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73581396] [2023-08-31 22:22:41,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 22:22:41,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-08-31 22:22:41,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:22:41,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-08-31 22:22:41,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1568, Unknown=0, NotChecked=0, Total=1722 [2023-08-31 22:22:46,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 327 [2023-08-31 22:22:46,449 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 162 transitions, 1734 flow. Second operand has 42 states, 42 states have (on average 136.92857142857142) internal successors, (5751), 42 states have internal predecessors, (5751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:46,450 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:22:46,450 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 327 [2023-08-31 22:22:46,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:22:51,028 INFO L130 PetriNetUnfolder]: 6671/13151 cut-off events. [2023-08-31 22:22:51,028 INFO L131 PetriNetUnfolder]: For 48656/48656 co-relation queries the response was YES. [2023-08-31 22:22:51,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58206 conditions, 13151 events. 6671/13151 cut-off events. For 48656/48656 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 88741 event pairs, 1994 based on Foata normal form. 204/13287 useless extension candidates. Maximal degree in co-relation 58157. Up to 7320 conditions per place. [2023-08-31 22:22:51,137 INFO L137 encePairwiseOnDemand]: 316/327 looper letters, 430 selfloop transitions, 66 changer transitions 0/496 dead transitions. [2023-08-31 22:22:51,138 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 496 transitions, 5061 flow [2023-08-31 22:22:51,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-31 22:22:51,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-31 22:22:51,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 4515 transitions. [2023-08-31 22:22:51,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44539804675939626 [2023-08-31 22:22:51,146 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 4515 transitions. [2023-08-31 22:22:51,146 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 4515 transitions. [2023-08-31 22:22:51,147 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:22:51,147 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 4515 transitions. [2023-08-31 22:22:51,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 145.6451612903226) internal successors, (4515), 31 states have internal predecessors, (4515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:51,161 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 327.0) internal successors, (10464), 32 states have internal predecessors, (10464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:51,162 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 327.0) internal successors, (10464), 32 states have internal predecessors, (10464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:51,163 INFO L175 Difference]: Start difference. First operand has 167 places, 162 transitions, 1734 flow. Second operand 31 states and 4515 transitions. [2023-08-31 22:22:51,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 496 transitions, 5061 flow [2023-08-31 22:22:51,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 496 transitions, 4446 flow, removed 221 selfloop flow, removed 15 redundant places. [2023-08-31 22:22:51,423 INFO L231 Difference]: Finished difference. Result has 194 places, 209 transitions, 2092 flow [2023-08-31 22:22:51,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=1365, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=2092, PETRI_PLACES=194, PETRI_TRANSITIONS=209} [2023-08-31 22:22:51,424 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 146 predicate places. [2023-08-31 22:22:51,424 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 209 transitions, 2092 flow [2023-08-31 22:22:51,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 136.92857142857142) internal successors, (5751), 42 states have internal predecessors, (5751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:51,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:22:51,425 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:22:51,432 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-31 22:22:51,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 22:22:51,629 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:22:51,629 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:22:51,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1895523700, now seen corresponding path program 3 times [2023-08-31 22:22:51,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:22:51,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277853031] [2023-08-31 22:22:51,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:22:51,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:22:51,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:22:52,207 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 22:22:52,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:22:52,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277853031] [2023-08-31 22:22:52,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277853031] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:22:52,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:22:52,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-31 22:22:52,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987203824] [2023-08-31 22:22:52,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:22:52,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-31 22:22:52,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:22:52,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-31 22:22:52,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2023-08-31 22:22:53,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 327 [2023-08-31 22:22:53,088 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 209 transitions, 2092 flow. Second operand has 15 states, 15 states have (on average 128.86666666666667) internal successors, (1933), 15 states have internal predecessors, (1933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:53,088 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:22:53,088 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 327 [2023-08-31 22:22:53,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:22:56,402 INFO L130 PetriNetUnfolder]: 8805/17698 cut-off events. [2023-08-31 22:22:56,402 INFO L131 PetriNetUnfolder]: For 54807/54829 co-relation queries the response was YES. [2023-08-31 22:22:56,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74247 conditions, 17698 events. 8805/17698 cut-off events. For 54807/54829 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 131752 event pairs, 1576 based on Foata normal form. 42/17499 useless extension candidates. Maximal degree in co-relation 74191. Up to 4381 conditions per place. [2023-08-31 22:22:56,555 INFO L137 encePairwiseOnDemand]: 308/327 looper letters, 212 selfloop transitions, 301 changer transitions 0/522 dead transitions. [2023-08-31 22:22:56,555 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 522 transitions, 5635 flow [2023-08-31 22:22:56,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-31 22:22:56,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-31 22:22:56,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 4387 transitions. [2023-08-31 22:22:56,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065424891112964 [2023-08-31 22:22:56,561 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 4387 transitions. [2023-08-31 22:22:56,561 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 4387 transitions. [2023-08-31 22:22:56,562 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:22:56,562 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 4387 transitions. [2023-08-31 22:22:56,569 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 132.93939393939394) internal successors, (4387), 33 states have internal predecessors, (4387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:56,577 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 327.0) internal successors, (11118), 34 states have internal predecessors, (11118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:56,578 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 327.0) internal successors, (11118), 34 states have internal predecessors, (11118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:56,578 INFO L175 Difference]: Start difference. First operand has 194 places, 209 transitions, 2092 flow. Second operand 33 states and 4387 transitions. [2023-08-31 22:22:56,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 522 transitions, 5635 flow [2023-08-31 22:22:56,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 522 transitions, 5393 flow, removed 89 selfloop flow, removed 11 redundant places. [2023-08-31 22:22:56,899 INFO L231 Difference]: Finished difference. Result has 222 places, 387 transitions, 4552 flow [2023-08-31 22:22:56,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=1976, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=4552, PETRI_PLACES=222, PETRI_TRANSITIONS=387} [2023-08-31 22:22:56,900 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 174 predicate places. [2023-08-31 22:22:56,900 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 387 transitions, 4552 flow [2023-08-31 22:22:56,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 128.86666666666667) internal successors, (1933), 15 states have internal predecessors, (1933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:56,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:22:56,901 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:22:56,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-31 22:22:56,901 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:22:56,901 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:22:56,901 INFO L85 PathProgramCache]: Analyzing trace with hash 732416370, now seen corresponding path program 4 times [2023-08-31 22:22:56,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:22:56,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406488455] [2023-08-31 22:22:56,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:22:56,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:22:56,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:22:57,645 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:22:57,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:22:57,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406488455] [2023-08-31 22:22:57,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406488455] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 22:22:57,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168949684] [2023-08-31 22:22:57,646 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 22:22:57,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 22:22:57,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 22:22:57,647 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 22:22:57,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-31 22:22:57,769 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 22:22:57,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 22:22:57,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 59 conjunts are in the unsatisfiable core [2023-08-31 22:22:57,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:22:57,788 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-31 22:22:57,789 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 [2023-08-31 22:22:58,146 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 19 treesize of output 15 [2023-08-31 22:22:58,161 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-31 22:22:58,162 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 16 treesize of output 16 [2023-08-31 22:22:58,226 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 56 treesize of output 52 [2023-08-31 22:22:58,705 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 107 treesize of output 43 [2023-08-31 22:22:58,805 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:22:58,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 22:22:59,266 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 22:22:59,266 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-08-31 22:22:59,276 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 22:22:59,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 49 treesize of output 52 [2023-08-31 22:22:59,281 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 28 treesize of output 22 [2023-08-31 22:22:59,684 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:22:59,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168949684] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 22:22:59,685 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 22:22:59,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 48 [2023-08-31 22:22:59,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564180683] [2023-08-31 22:22:59,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 22:22:59,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-08-31 22:22:59,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:22:59,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-08-31 22:22:59,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=2268, Unknown=12, NotChecked=0, Total=2450 [2023-08-31 22:23:06,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 327 [2023-08-31 22:23:06,686 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 387 transitions, 4552 flow. Second operand has 50 states, 50 states have (on average 88.68) internal successors, (4434), 50 states have internal predecessors, (4434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:06,686 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:23:06,686 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 327 [2023-08-31 22:23:06,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:23:22,078 INFO L130 PetriNetUnfolder]: 9627/18985 cut-off events. [2023-08-31 22:23:22,078 INFO L131 PetriNetUnfolder]: For 67627/67627 co-relation queries the response was YES. [2023-08-31 22:23:22,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85363 conditions, 18985 events. 9627/18985 cut-off events. For 67627/67627 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 142030 event pairs, 1682 based on Foata normal form. 174/18861 useless extension candidates. Maximal degree in co-relation 85299. Up to 5781 conditions per place. [2023-08-31 22:23:22,267 INFO L137 encePairwiseOnDemand]: 305/327 looper letters, 571 selfloop transitions, 371 changer transitions 0/942 dead transitions. [2023-08-31 22:23:22,267 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 942 transitions, 10124 flow [2023-08-31 22:23:22,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2023-08-31 22:23:22,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2023-08-31 22:23:22,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 6920 transitions. [2023-08-31 22:23:22,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28597404744193733 [2023-08-31 22:23:22,277 INFO L72 ComplementDD]: Start complementDD. Operand 74 states and 6920 transitions. [2023-08-31 22:23:22,277 INFO L73 IsDeterministic]: Start isDeterministic. Operand 74 states and 6920 transitions. [2023-08-31 22:23:22,279 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:23:22,279 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 74 states and 6920 transitions. [2023-08-31 22:23:22,286 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 75 states, 74 states have (on average 93.51351351351352) internal successors, (6920), 74 states have internal predecessors, (6920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:22,302 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 75 states, 75 states have (on average 327.0) internal successors, (24525), 75 states have internal predecessors, (24525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:22,305 INFO L81 ComplementDD]: Finished complementDD. Result has 75 states, 75 states have (on average 327.0) internal successors, (24525), 75 states have internal predecessors, (24525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:22,306 INFO L175 Difference]: Start difference. First operand has 222 places, 387 transitions, 4552 flow. Second operand 74 states and 6920 transitions. [2023-08-31 22:23:22,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 942 transitions, 10124 flow [2023-08-31 22:23:22,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 942 transitions, 9762 flow, removed 159 selfloop flow, removed 5 redundant places. [2023-08-31 22:23:22,764 INFO L231 Difference]: Finished difference. Result has 323 places, 560 transitions, 7368 flow [2023-08-31 22:23:22,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=3938, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=74, PETRI_FLOW=7368, PETRI_PLACES=323, PETRI_TRANSITIONS=560} [2023-08-31 22:23:22,764 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 275 predicate places. [2023-08-31 22:23:22,765 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 560 transitions, 7368 flow [2023-08-31 22:23:22,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 88.68) internal successors, (4434), 50 states have internal predecessors, (4434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:22,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:23:22,766 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:23:22,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-31 22:23:22,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 22:23:22,971 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:23:22,972 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:23:22,972 INFO L85 PathProgramCache]: Analyzing trace with hash -681156031, now seen corresponding path program 2 times [2023-08-31 22:23:22,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:23:22,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924861767] [2023-08-31 22:23:22,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:23:22,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:23:22,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:23:23,142 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 22:23:23,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:23:23,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924861767] [2023-08-31 22:23:23,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924861767] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 22:23:23,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483418232] [2023-08-31 22:23:23,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 22:23:23,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 22:23:23,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 22:23:23,145 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 22:23:23,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-31 22:23:23,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 22:23:23,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 22:23:23,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-31 22:23:23,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:23:23,319 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 22:23:23,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 22:23:23,403 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 22:23:23,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483418232] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 22:23:23,404 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 22:23:23,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 15 [2023-08-31 22:23:23,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801499342] [2023-08-31 22:23:23,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 22:23:23,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-31 22:23:23,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:23:23,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-31 22:23:23,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2023-08-31 22:23:23,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 327 [2023-08-31 22:23:23,507 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 560 transitions, 7368 flow. Second operand has 16 states, 16 states have (on average 142.9375) internal successors, (2287), 16 states have internal predecessors, (2287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:23,507 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:23:23,507 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 327 [2023-08-31 22:23:23,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:23:28,019 INFO L130 PetriNetUnfolder]: 10307/20387 cut-off events. [2023-08-31 22:23:28,020 INFO L131 PetriNetUnfolder]: For 94359/94359 co-relation queries the response was YES. [2023-08-31 22:23:28,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100823 conditions, 20387 events. 10307/20387 cut-off events. For 94359/94359 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 155295 event pairs, 2939 based on Foata normal form. 158/20219 useless extension candidates. Maximal degree in co-relation 100727. Up to 5467 conditions per place. [2023-08-31 22:23:28,190 INFO L137 encePairwiseOnDemand]: 316/327 looper letters, 483 selfloop transitions, 315 changer transitions 0/798 dead transitions. [2023-08-31 22:23:28,190 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 798 transitions, 11456 flow [2023-08-31 22:23:28,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-31 22:23:28,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-31 22:23:28,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2536 transitions. [2023-08-31 22:23:28,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45619715776218744 [2023-08-31 22:23:28,193 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2536 transitions. [2023-08-31 22:23:28,193 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2536 transitions. [2023-08-31 22:23:28,194 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:23:28,194 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2536 transitions. [2023-08-31 22:23:28,197 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 149.1764705882353) internal successors, (2536), 17 states have internal predecessors, (2536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:28,200 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 327.0) internal successors, (5886), 18 states have internal predecessors, (5886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:28,200 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 327.0) internal successors, (5886), 18 states have internal predecessors, (5886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:28,201 INFO L175 Difference]: Start difference. First operand has 323 places, 560 transitions, 7368 flow. Second operand 17 states and 2536 transitions. [2023-08-31 22:23:28,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 798 transitions, 11456 flow [2023-08-31 22:23:29,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 798 transitions, 10269 flow, removed 367 selfloop flow, removed 17 redundant places. [2023-08-31 22:23:29,142 INFO L231 Difference]: Finished difference. Result has 320 places, 567 transitions, 7702 flow [2023-08-31 22:23:29,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=6017, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=254, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=7702, PETRI_PLACES=320, PETRI_TRANSITIONS=567} [2023-08-31 22:23:29,143 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 272 predicate places. [2023-08-31 22:23:29,143 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 567 transitions, 7702 flow [2023-08-31 22:23:29,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 142.9375) internal successors, (2287), 16 states have internal predecessors, (2287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:29,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:23:29,144 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:23:29,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-31 22:23:29,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-08-31 22:23:29,344 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:23:29,345 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:23:29,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1752014428, now seen corresponding path program 2 times [2023-08-31 22:23:29,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:23:29,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000721547] [2023-08-31 22:23:29,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:23:29,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:23:29,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:23:30,006 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:23:30,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:23:30,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000721547] [2023-08-31 22:23:30,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000721547] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 22:23:30,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63165223] [2023-08-31 22:23:30,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 22:23:30,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 22:23:30,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 22:23:30,008 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 22:23:30,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-31 22:23:30,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 22:23:30,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 22:23:30,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 45 conjunts are in the unsatisfiable core [2023-08-31 22:23:30,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:23:30,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 22:23:30,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 22:23:30,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 22:23:30,159 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 [2023-08-31 22:23:30,597 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:23:30,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 22:23:30,993 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:23:30,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63165223] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 22:23:30,994 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 22:23:30,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 10, 9] total 39 [2023-08-31 22:23:30,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225867550] [2023-08-31 22:23:30,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 22:23:30,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-08-31 22:23:30,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:23:30,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-08-31 22:23:30,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1432, Unknown=0, NotChecked=0, Total=1640 [2023-08-31 22:23:34,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 327 [2023-08-31 22:23:34,065 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 567 transitions, 7702 flow. Second operand has 41 states, 41 states have (on average 129.26829268292684) internal successors, (5300), 41 states have internal predecessors, (5300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:34,065 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:23:34,065 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 327 [2023-08-31 22:23:34,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:23:41,097 INFO L130 PetriNetUnfolder]: 12174/24096 cut-off events. [2023-08-31 22:23:41,097 INFO L131 PetriNetUnfolder]: For 99344/99344 co-relation queries the response was YES. [2023-08-31 22:23:41,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117101 conditions, 24096 events. 12174/24096 cut-off events. For 99344/99344 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 191141 event pairs, 3421 based on Foata normal form. 68/23885 useless extension candidates. Maximal degree in co-relation 117001. Up to 14966 conditions per place. [2023-08-31 22:23:41,327 INFO L137 encePairwiseOnDemand]: 313/327 looper letters, 764 selfloop transitions, 171 changer transitions 0/935 dead transitions. [2023-08-31 22:23:41,327 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 935 transitions, 13062 flow [2023-08-31 22:23:41,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-31 22:23:41,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-31 22:23:41,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 3953 transitions. [2023-08-31 22:23:41,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41685120742381104 [2023-08-31 22:23:41,332 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 3953 transitions. [2023-08-31 22:23:41,332 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 3953 transitions. [2023-08-31 22:23:41,333 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:23:41,333 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 3953 transitions. [2023-08-31 22:23:41,337 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 136.31034482758622) internal successors, (3953), 29 states have internal predecessors, (3953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:41,343 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 327.0) internal successors, (9810), 30 states have internal predecessors, (9810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:41,344 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 327.0) internal successors, (9810), 30 states have internal predecessors, (9810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:41,344 INFO L175 Difference]: Start difference. First operand has 320 places, 567 transitions, 7702 flow. Second operand 29 states and 3953 transitions. [2023-08-31 22:23:41,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 935 transitions, 13062 flow [2023-08-31 22:23:42,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 935 transitions, 12780 flow, removed 63 selfloop flow, removed 5 redundant places. [2023-08-31 22:23:42,032 INFO L231 Difference]: Finished difference. Result has 357 places, 656 transitions, 9503 flow [2023-08-31 22:23:42,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=7511, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=9503, PETRI_PLACES=357, PETRI_TRANSITIONS=656} [2023-08-31 22:23:42,033 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 309 predicate places. [2023-08-31 22:23:42,033 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 656 transitions, 9503 flow [2023-08-31 22:23:42,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 129.26829268292684) internal successors, (5300), 41 states have internal predecessors, (5300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:42,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:23:42,034 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:23:42,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-31 22:23:42,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-31 22:23:42,235 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:23:42,235 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:23:42,235 INFO L85 PathProgramCache]: Analyzing trace with hash 2002287342, now seen corresponding path program 2 times [2023-08-31 22:23:42,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:23:42,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091993013] [2023-08-31 22:23:42,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:23:42,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:23:42,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:23:42,282 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-08-31 22:23:42,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:23:42,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091993013] [2023-08-31 22:23:42,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091993013] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 22:23:42,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840727027] [2023-08-31 22:23:42,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 22:23:42,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 22:23:42,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 22:23:42,284 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 22:23:42,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-31 22:23:42,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-31 22:23:42,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 22:23:42,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-31 22:23:42,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:23:42,597 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-08-31 22:23:42,597 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 22:23:42,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840727027] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:23:42,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-31 22:23:42,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4] total 5 [2023-08-31 22:23:42,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820232129] [2023-08-31 22:23:42,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:23:42,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:23:42,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:23:42,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:23:42,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-31 22:23:42,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 327 [2023-08-31 22:23:42,748 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 656 transitions, 9503 flow. Second operand has 3 states, 3 states have (on average 152.0) internal successors, (456), 3 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:42,748 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:23:42,748 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 327 [2023-08-31 22:23:42,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:23:48,699 INFO L130 PetriNetUnfolder]: 11163/22902 cut-off events. [2023-08-31 22:23:48,699 INFO L131 PetriNetUnfolder]: For 108606/108682 co-relation queries the response was YES. [2023-08-31 22:23:48,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113985 conditions, 22902 events. 11163/22902 cut-off events. For 108606/108682 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 187351 event pairs, 9218 based on Foata normal form. 85/22758 useless extension candidates. Maximal degree in co-relation 113873. Up to 21811 conditions per place. [2023-08-31 22:23:48,979 INFO L137 encePairwiseOnDemand]: 325/327 looper letters, 535 selfloop transitions, 1 changer transitions 1/644 dead transitions. [2023-08-31 22:23:48,979 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 644 transitions, 10480 flow [2023-08-31 22:23:48,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:23:48,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:23:48,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 467 transitions. [2023-08-31 22:23:48,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47604485219164117 [2023-08-31 22:23:48,980 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 467 transitions. [2023-08-31 22:23:48,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 467 transitions. [2023-08-31 22:23:48,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:23:48,981 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 467 transitions. [2023-08-31 22:23:48,981 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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) [2023-08-31 22:23:48,982 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:48,982 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:48,982 INFO L175 Difference]: Start difference. First operand has 357 places, 656 transitions, 9503 flow. Second operand 3 states and 467 transitions. [2023-08-31 22:23:48,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 644 transitions, 10480 flow [2023-08-31 22:23:49,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 644 transitions, 10207 flow, removed 76 selfloop flow, removed 10 redundant places. [2023-08-31 22:23:49,908 INFO L231 Difference]: Finished difference. Result has 340 places, 643 transitions, 9132 flow [2023-08-31 22:23:49,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=9133, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=644, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=643, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=9132, PETRI_PLACES=340, PETRI_TRANSITIONS=643} [2023-08-31 22:23:49,908 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 292 predicate places. [2023-08-31 22:23:49,909 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 643 transitions, 9132 flow [2023-08-31 22:23:49,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 152.0) internal successors, (456), 3 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:49,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:23:49,909 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:23:49,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-31 22:23:50,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-31 22:23:50,110 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:23:50,110 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:23:50,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1972717191, now seen corresponding path program 1 times [2023-08-31 22:23:50,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:23:50,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942551655] [2023-08-31 22:23:50,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:23:50,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:23:50,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:23:51,424 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:23:51,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:23:51,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942551655] [2023-08-31 22:23:51,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942551655] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 22:23:51,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896698806] [2023-08-31 22:23:51,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:23:51,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 22:23:51,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 22:23:51,427 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 22:23:51,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-31 22:23:51,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:23:51,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 74 conjunts are in the unsatisfiable core [2023-08-31 22:23:51,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:23:51,833 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 15 treesize of output 11 [2023-08-31 22:23:52,252 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 45 treesize of output 32 [2023-08-31 22:23:53,000 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 22:23:53,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 43 [2023-08-31 22:23:53,089 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:23:53,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 22:23:54,227 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 57 treesize of output 48 [2023-08-31 22:23:54,508 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:23:54,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896698806] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 22:23:54,509 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 22:23:54,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20, 20] total 63 [2023-08-31 22:23:54,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356695308] [2023-08-31 22:23:54,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 22:23:54,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2023-08-31 22:23:54,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:23:54,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2023-08-31 22:23:54,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=410, Invalid=3750, Unknown=0, NotChecked=0, Total=4160 [2023-08-31 22:24:00,125 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 22:24:03,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 327 [2023-08-31 22:24:03,753 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 643 transitions, 9132 flow. Second operand has 65 states, 65 states have (on average 121.66153846153846) internal successors, (7908), 65 states have internal predecessors, (7908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:24:03,753 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:24:03,753 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 327 [2023-08-31 22:24:03,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:24:12,736 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 22:24:19,069 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 22:24:21,081 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 22:24:34,839 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 22:24:36,843 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 22:24:38,849 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 22:24:41,335 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 22:24:46,647 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 22:24:49,672 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 22:24:51,702 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 22:25:05,780 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 22:25:11,486 INFO L130 PetriNetUnfolder]: 20982/40866 cut-off events. [2023-08-31 22:25:11,486 INFO L131 PetriNetUnfolder]: For 184698/184698 co-relation queries the response was YES. [2023-08-31 22:25:11,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 202155 conditions, 40866 events. 20982/40866 cut-off events. For 184698/184698 co-relation queries the response was YES. Maximal size of possible extension queue 698. Compared 339777 event pairs, 4219 based on Foata normal form. 224/40817 useless extension candidates. Maximal degree in co-relation 202042. Up to 15840 conditions per place. [2023-08-31 22:25:12,092 INFO L137 encePairwiseOnDemand]: 307/327 looper letters, 975 selfloop transitions, 768 changer transitions 174/1917 dead transitions. [2023-08-31 22:25:12,092 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 1917 transitions, 26114 flow [2023-08-31 22:25:12,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2023-08-31 22:25:12,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2023-08-31 22:25:12,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 18672 transitions. [2023-08-31 22:25:12,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3832276337663937 [2023-08-31 22:25:12,109 INFO L72 ComplementDD]: Start complementDD. Operand 149 states and 18672 transitions. [2023-08-31 22:25:12,109 INFO L73 IsDeterministic]: Start isDeterministic. Operand 149 states and 18672 transitions. [2023-08-31 22:25:12,114 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:25:12,114 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 149 states and 18672 transitions. [2023-08-31 22:25:12,133 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 150 states, 149 states have (on average 125.31543624161074) internal successors, (18672), 149 states have internal predecessors, (18672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:25:12,166 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 150 states, 150 states have (on average 327.0) internal successors, (49050), 150 states have internal predecessors, (49050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:25:12,173 INFO L81 ComplementDD]: Finished complementDD. Result has 150 states, 150 states have (on average 327.0) internal successors, (49050), 150 states have internal predecessors, (49050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:25:12,174 INFO L175 Difference]: Start difference. First operand has 340 places, 643 transitions, 9132 flow. Second operand 149 states and 18672 transitions. [2023-08-31 22:25:12,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 1917 transitions, 26114 flow [2023-08-31 22:25:13,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 1917 transitions, 26113 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 22:25:13,719 INFO L231 Difference]: Finished difference. Result has 521 places, 1261 transitions, 20548 flow [2023-08-31 22:25:13,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=9131, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=643, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=253, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=149, PETRI_FLOW=20548, PETRI_PLACES=521, PETRI_TRANSITIONS=1261} [2023-08-31 22:25:13,720 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 473 predicate places. [2023-08-31 22:25:13,720 INFO L495 AbstractCegarLoop]: Abstraction has has 521 places, 1261 transitions, 20548 flow [2023-08-31 22:25:13,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 121.66153846153846) internal successors, (7908), 65 states have internal predecessors, (7908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:25:13,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:25:13,722 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:25:13,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-31 22:25:13,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-08-31 22:25:13,925 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:25:13,925 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:25:13,926 INFO L85 PathProgramCache]: Analyzing trace with hash 796650369, now seen corresponding path program 2 times [2023-08-31 22:25:13,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:25:13,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050394201] [2023-08-31 22:25:13,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:25:13,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:25:13,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:25:15,628 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:25:15,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:25:15,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050394201] [2023-08-31 22:25:15,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050394201] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 22:25:15,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918898299] [2023-08-31 22:25:15,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 22:25:15,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 22:25:15,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 22:25:15,633 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 22:25:15,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-31 22:25:15,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 22:25:15,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 22:25:15,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 86 conjunts are in the unsatisfiable core [2023-08-31 22:25:15,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:25:15,820 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-31 22:25:15,820 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 15 treesize of output 15 [2023-08-31 22:25:16,086 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 15 treesize of output 11 [2023-08-31 22:25:16,157 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 40 treesize of output 36 [2023-08-31 22:25:16,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 22:25:16,635 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 49 treesize of output 36 [2023-08-31 22:25:17,294 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 75 treesize of output 43 [2023-08-31 22:25:17,388 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:25:17,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 22:25:18,478 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 22:25:18,478 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-08-31 22:25:18,488 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 22:25:18,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 49 treesize of output 52 [2023-08-31 22:25:18,492 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 28 treesize of output 22 [2023-08-31 22:25:18,717 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:25:18,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918898299] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 22:25:18,717 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 22:25:18,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21, 20] total 65 [2023-08-31 22:25:18,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560667358] [2023-08-31 22:25:18,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 22:25:18,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2023-08-31 22:25:18,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:25:18,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2023-08-31 22:25:18,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=4171, Unknown=8, NotChecked=0, Total=4422 [2023-08-31 22:25:31,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 327 [2023-08-31 22:25:31,250 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 521 places, 1261 transitions, 20548 flow. Second operand has 67 states, 67 states have (on average 100.61194029850746) internal successors, (6741), 67 states have internal predecessors, (6741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:25:31,251 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:25:31,251 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 327 [2023-08-31 22:25:31,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:26:36,862 INFO L130 PetriNetUnfolder]: 27397/53779 cut-off events. [2023-08-31 22:26:36,862 INFO L131 PetriNetUnfolder]: For 351764/351764 co-relation queries the response was YES. [2023-08-31 22:26:38,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 289852 conditions, 53779 events. 27397/53779 cut-off events. For 351764/351764 co-relation queries the response was YES. Maximal size of possible extension queue 760. Compared 466846 event pairs, 3094 based on Foata normal form. 702/53963 useless extension candidates. Maximal degree in co-relation 289704. Up to 10437 conditions per place. [2023-08-31 22:26:38,268 INFO L137 encePairwiseOnDemand]: 306/327 looper letters, 596 selfloop transitions, 2204 changer transitions 104/2904 dead transitions. [2023-08-31 22:26:38,268 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 671 places, 2904 transitions, 45279 flow [2023-08-31 22:26:38,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2023-08-31 22:26:38,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2023-08-31 22:26:38,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 17863 transitions. [2023-08-31 22:26:38,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3175983215987483 [2023-08-31 22:26:38,287 INFO L72 ComplementDD]: Start complementDD. Operand 172 states and 17863 transitions. [2023-08-31 22:26:38,287 INFO L73 IsDeterministic]: Start isDeterministic. Operand 172 states and 17863 transitions. [2023-08-31 22:26:38,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:26:38,291 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 172 states and 17863 transitions. [2023-08-31 22:26:38,306 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 173 states, 172 states have (on average 103.8546511627907) internal successors, (17863), 172 states have internal predecessors, (17863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:26:38,342 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 173 states, 173 states have (on average 327.0) internal successors, (56571), 173 states have internal predecessors, (56571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:26:38,351 INFO L81 ComplementDD]: Finished complementDD. Result has 173 states, 173 states have (on average 327.0) internal successors, (56571), 173 states have internal predecessors, (56571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:26:38,351 INFO L175 Difference]: Start difference. First operand has 521 places, 1261 transitions, 20548 flow. Second operand 172 states and 17863 transitions. [2023-08-31 22:26:38,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 671 places, 2904 transitions, 45279 flow [2023-08-31 22:26:42,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 648 places, 2904 transitions, 42804 flow, removed 1026 selfloop flow, removed 23 redundant places. [2023-08-31 22:26:42,327 INFO L231 Difference]: Finished difference. Result has 666 places, 2331 transitions, 39345 flow [2023-08-31 22:26:42,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=15440, PETRI_DIFFERENCE_MINUEND_PLACES=477, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1038, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=954, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=172, PETRI_FLOW=39345, PETRI_PLACES=666, PETRI_TRANSITIONS=2331} [2023-08-31 22:26:42,328 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 618 predicate places. [2023-08-31 22:26:42,329 INFO L495 AbstractCegarLoop]: Abstraction has has 666 places, 2331 transitions, 39345 flow [2023-08-31 22:26:42,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 100.61194029850746) internal successors, (6741), 67 states have internal predecessors, (6741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:26:42,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:26:42,330 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1] [2023-08-31 22:26:42,335 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-08-31 22:26:42,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-31 22:26:42,531 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:26:42,531 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:26:42,531 INFO L85 PathProgramCache]: Analyzing trace with hash 619878933, now seen corresponding path program 2 times [2023-08-31 22:26:42,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:26:42,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920378521] [2023-08-31 22:26:42,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:26:42,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:26:42,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:26:42,949 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 5 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:26:42,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:26:42,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920378521] [2023-08-31 22:26:42,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920378521] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 22:26:42,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363062828] [2023-08-31 22:26:42,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 22:26:42,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 22:26:42,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 22:26:42,953 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 22:26:42,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-31 22:26:43,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 22:26:43,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 22:26:43,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-31 22:26:43,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:26:43,155 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 5 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:26:43,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 22:26:43,299 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 5 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:26:43,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363062828] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 22:26:43,299 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 22:26:43,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 29 [2023-08-31 22:26:43,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360836582] [2023-08-31 22:26:43,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 22:26:43,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-31 22:26:43,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:26:43,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-31 22:26:43,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=636, Unknown=0, NotChecked=0, Total=870 [2023-08-31 22:26:43,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 327 [2023-08-31 22:26:43,440 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 666 places, 2331 transitions, 39345 flow. Second operand has 30 states, 30 states have (on average 145.26666666666668) internal successors, (4358), 30 states have internal predecessors, (4358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:26:43,440 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:26:43,440 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 327 [2023-08-31 22:26:43,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:27:16,484 INFO L130 PetriNetUnfolder]: 30957/60809 cut-off events. [2023-08-31 22:27:16,484 INFO L131 PetriNetUnfolder]: For 405803/405803 co-relation queries the response was YES. [2023-08-31 22:27:17,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 350750 conditions, 60809 events. 30957/60809 cut-off events. For 405803/405803 co-relation queries the response was YES. Maximal size of possible extension queue 813. Compared 519622 event pairs, 10604 based on Foata normal form. 348/60531 useless extension candidates. Maximal degree in co-relation 350595. Up to 33375 conditions per place. [2023-08-31 22:27:17,967 INFO L137 encePairwiseOnDemand]: 318/327 looper letters, 2544 selfloop transitions, 760 changer transitions 9/3313 dead transitions. [2023-08-31 22:27:17,967 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 696 places, 3313 transitions, 60179 flow [2023-08-31 22:27:17,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-31 22:27:17,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-31 22:27:17,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 4767 transitions. [2023-08-31 22:27:17,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.470257472625037 [2023-08-31 22:27:17,970 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 4767 transitions. [2023-08-31 22:27:17,970 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 4767 transitions. [2023-08-31 22:27:17,971 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:27:17,971 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 4767 transitions. [2023-08-31 22:27:17,973 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 153.7741935483871) internal successors, (4767), 31 states have internal predecessors, (4767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:27:17,982 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 327.0) internal successors, (10464), 32 states have internal predecessors, (10464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:27:17,983 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 327.0) internal successors, (10464), 32 states have internal predecessors, (10464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:27:17,983 INFO L175 Difference]: Start difference. First operand has 666 places, 2331 transitions, 39345 flow. Second operand 31 states and 4767 transitions. [2023-08-31 22:27:17,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 696 places, 3313 transitions, 60179 flow [2023-08-31 22:27:24,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 665 places, 3313 transitions, 55685 flow, removed 1998 selfloop flow, removed 31 redundant places. [2023-08-31 22:27:24,681 INFO L231 Difference]: Finished difference. Result has 677 places, 2498 transitions, 41832 flow [2023-08-31 22:27:24,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=35367, PETRI_DIFFERENCE_MINUEND_PLACES=635, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=557, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1646, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=41832, PETRI_PLACES=677, PETRI_TRANSITIONS=2498} [2023-08-31 22:27:24,684 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 629 predicate places. [2023-08-31 22:27:24,684 INFO L495 AbstractCegarLoop]: Abstraction has has 677 places, 2498 transitions, 41832 flow [2023-08-31 22:27:24,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 145.26666666666668) internal successors, (4358), 30 states have internal predecessors, (4358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:27:24,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:27:24,685 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:27:24,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-31 22:27:24,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 22:27:24,890 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:27:24,890 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:27:24,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1290609857, now seen corresponding path program 3 times [2023-08-31 22:27:24,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:27:24,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305814492] [2023-08-31 22:27:24,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:27:24,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:27:24,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:27:30,228 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:27:30,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:27:30,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305814492] [2023-08-31 22:27:30,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305814492] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 22:27:30,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609419180] [2023-08-31 22:27:30,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 22:27:30,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 22:27:30,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 22:27:30,230 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 22:27:30,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-31 22:27:30,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-31 22:27:30,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 22:27:30,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 88 conjunts are in the unsatisfiable core [2023-08-31 22:27:30,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:27:30,486 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-31 22:27:30,486 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 15 treesize of output 15 [2023-08-31 22:27:31,134 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 15 treesize of output 11 [2023-08-31 22:27:32,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 22:27:32,040 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 49 treesize of output 36 [2023-08-31 22:27:32,279 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 40 treesize of output 36 [2023-08-31 22:27:33,966 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 75 treesize of output 43 [2023-08-31 22:27:34,209 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:27:34,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 22:27:40,736 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2023-08-31 22:27:40,736 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 53 treesize of output 60 [2023-08-31 22:27:40,746 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 22:27:40,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 67 treesize of output 70 [2023-08-31 22:27:40,751 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 28 treesize of output 22 [2023-08-31 22:27:45,245 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 10 proven. 16 refuted. 2 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 22:27:45,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609419180] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 22:27:45,246 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 22:27:45,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 23, 22] total 76 [2023-08-31 22:27:45,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887914202] [2023-08-31 22:27:45,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 22:27:45,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2023-08-31 22:27:45,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:27:45,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2023-08-31 22:27:45,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=5638, Unknown=59, NotChecked=0, Total=6006 [2023-08-31 22:27:54,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 327 [2023-08-31 22:27:54,544 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 677 places, 2498 transitions, 41832 flow. Second operand has 78 states, 78 states have (on average 88.65384615384616) internal successors, (6915), 78 states have internal predecessors, (6915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:27:54,545 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:27:54,545 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 327 [2023-08-31 22:27:54,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:28:06,567 WARN L222 SmtUtils]: Spent 8.50s on a formula simplification. DAG size of input: 168 DAG size of output: 121 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 22:28:19,037 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 22:30:00,048 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 22:32:28,553 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 22:34:44,545 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] Killed by 15