./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/goblint-regression/06-symbeq_05-funloop_hard2.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/goblint-regression/06-symbeq_05-funloop_hard2.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 9e83a031749850377e0f1ecd2c361048b8f87f697f146600048034d31c93bd9a --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 21:17:01,785 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 21:17:01,787 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 21:17:01,829 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 21:17:01,829 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 21:17:01,832 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 21:17:01,834 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 21:17:01,837 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 21:17:01,838 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 21:17:01,843 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 21:17:01,844 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 21:17:01,846 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 21:17:01,847 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 21:17:01,848 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 21:17:01,849 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 21:17:01,854 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 21:17:01,855 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 21:17:01,859 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 21:17:01,861 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 21:17:01,867 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 21:17:01,869 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 21:17:01,870 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 21:17:01,870 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 21:17:01,871 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 21:17:01,877 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 21:17:01,878 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 21:17:01,878 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 21:17:01,879 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 21:17:01,880 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 21:17:01,881 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 21:17:01,881 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 21:17:01,882 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 21:17:01,884 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 21:17:01,885 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 21:17:01,885 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 21:17:01,886 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 21:17:01,886 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 21:17:01,886 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 21:17:01,887 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 21:17:01,887 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 21:17:01,888 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 21:17:01,889 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-29 21:17:01,928 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 21:17:01,929 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 21:17:01,930 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 21:17:01,930 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 21:17:01,931 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 21:17:01,931 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 21:17:01,931 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 21:17:01,931 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 21:17:01,932 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 21:17:01,932 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 21:17:01,933 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 21:17:01,933 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 21:17:01,933 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 21:17:01,933 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 21:17:01,933 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 21:17:01,934 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 21:17:01,934 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 21:17:01,934 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 21:17:01,934 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 21:17:01,934 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 21:17:01,934 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 21:17:01,934 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 21:17:01,935 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 21:17:01,935 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 21:17:01,935 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 21:17:01,935 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 21:17:01,935 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 21:17:01,936 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 21:17:01,936 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-29 21:17:01,936 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-29 21:17:01,936 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 21:17:01,936 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 21:17:01,936 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 21:17:01,937 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 21:17:01,937 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9e83a031749850377e0f1ecd2c361048b8f87f697f146600048034d31c93bd9a Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 21:17:02,214 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 21:17:02,235 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 21:17:02,238 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 21:17:02,239 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 21:17:02,239 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 21:17:02,240 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/06-symbeq_05-funloop_hard2.i [2023-08-29 21:17:03,412 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 21:17:03,626 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 21:17:03,627 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/06-symbeq_05-funloop_hard2.i [2023-08-29 21:17:03,651 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/04df7fb77/7440336307a3458b9c3b5d1d6f91f26d/FLAG98f95a7a7 [2023-08-29 21:17:03,668 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/04df7fb77/7440336307a3458b9c3b5d1d6f91f26d [2023-08-29 21:17:03,671 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 21:17:03,672 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 21:17:03,675 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 21:17:03,675 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 21:17:03,678 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 21:17:03,679 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 09:17:03" (1/1) ... [2023-08-29 21:17:03,679 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@250c4eff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:17:03, skipping insertion in model container [2023-08-29 21:17:03,680 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 09:17:03" (1/1) ... [2023-08-29 21:17:03,685 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 21:17:03,735 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 21:17:04,074 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 21:17:04,099 INFO L203 MainTranslator]: Completed pre-run [2023-08-29 21:17:04,146 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 21:17:04,219 INFO L208 MainTranslator]: Completed translation [2023-08-29 21:17:04,219 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:17:04 WrapperNode [2023-08-29 21:17:04,220 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 21:17:04,221 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-29 21:17:04,221 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-29 21:17:04,221 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-29 21:17:04,227 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:17:04" (1/1) ... [2023-08-29 21:17:04,257 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:17:04" (1/1) ... [2023-08-29 21:17:04,282 INFO L138 Inliner]: procedures = 262, calls = 16, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 79 [2023-08-29 21:17:04,282 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-29 21:17:04,283 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-29 21:17:04,283 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-29 21:17:04,283 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-29 21:17:04,290 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:17:04" (1/1) ... [2023-08-29 21:17:04,291 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:17:04" (1/1) ... [2023-08-29 21:17:04,303 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:17:04" (1/1) ... [2023-08-29 21:17:04,304 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:17:04" (1/1) ... [2023-08-29 21:17:04,313 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:17:04" (1/1) ... [2023-08-29 21:17:04,320 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:17:04" (1/1) ... [2023-08-29 21:17:04,322 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:17:04" (1/1) ... [2023-08-29 21:17:04,330 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:17:04" (1/1) ... [2023-08-29 21:17:04,332 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-29 21:17:04,336 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-29 21:17:04,336 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-29 21:17:04,336 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-29 21:17:04,337 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:17:04" (1/1) ... [2023-08-29 21:17:04,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 21:17:04,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:17:04,370 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-29 21:17:04,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-29 21:17:04,416 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-29 21:17:04,416 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-29 21:17:04,416 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-29 21:17:04,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-29 21:17:04,417 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-29 21:17:04,417 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-29 21:17:04,417 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-29 21:17:04,417 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-29 21:17:04,417 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-29 21:17:04,417 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-29 21:17:04,419 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-29 21:17:04,623 INFO L236 CfgBuilder]: Building ICFG [2023-08-29 21:17:04,624 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-29 21:17:04,789 INFO L277 CfgBuilder]: Performing block encoding [2023-08-29 21:17:04,795 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-29 21:17:04,795 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-29 21:17:04,797 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 09:17:04 BoogieIcfgContainer [2023-08-29 21:17:04,798 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-29 21:17:04,800 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-29 21:17:04,800 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-29 21:17:04,803 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-29 21:17:04,803 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 09:17:03" (1/3) ... [2023-08-29 21:17:04,804 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1020c51b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 09:17:04, skipping insertion in model container [2023-08-29 21:17:04,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:17:04" (2/3) ... [2023-08-29 21:17:04,804 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1020c51b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 09:17:04, skipping insertion in model container [2023-08-29 21:17:04,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 09:17:04" (3/3) ... [2023-08-29 21:17:04,806 INFO L112 eAbstractionObserver]: Analyzing ICFG 06-symbeq_05-funloop_hard2.i [2023-08-29 21:17:04,821 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-29 21:17:04,821 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2023-08-29 21:17:04,821 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-29 21:17:04,916 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-29 21:17:04,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 96 places, 98 transitions, 201 flow [2023-08-29 21:17:05,031 INFO L130 PetriNetUnfolder]: 6/97 cut-off events. [2023-08-29 21:17:05,031 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:17:05,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101 conditions, 97 events. 6/97 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 211 event pairs, 0 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 72. Up to 2 conditions per place. [2023-08-29 21:17:05,037 INFO L82 GeneralOperation]: Start removeDead. Operand has 96 places, 98 transitions, 201 flow [2023-08-29 21:17:05,042 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 95 places, 97 transitions, 197 flow [2023-08-29 21:17:05,046 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:17:05,062 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 95 places, 97 transitions, 197 flow [2023-08-29 21:17:05,066 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 95 places, 97 transitions, 197 flow [2023-08-29 21:17:05,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 95 places, 97 transitions, 197 flow [2023-08-29 21:17:05,098 INFO L130 PetriNetUnfolder]: 6/97 cut-off events. [2023-08-29 21:17:05,099 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:17:05,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101 conditions, 97 events. 6/97 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 213 event pairs, 0 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 72. Up to 2 conditions per place. [2023-08-29 21:17:05,102 INFO L119 LiptonReduction]: Number of co-enabled transitions 2430 [2023-08-29 21:17:07,203 INFO L134 LiptonReduction]: Checked pairs total: 3471 [2023-08-29 21:17:07,203 INFO L136 LiptonReduction]: Total number of compositions: 99 [2023-08-29 21:17:07,214 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 21:17:07,219 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;@58e3b012, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:17:07,219 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2023-08-29 21:17:07,221 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-29 21:17:07,221 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:17:07,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:17:07,222 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:17:07,222 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-08-29 21:17:07,226 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:17:07,226 INFO L85 PathProgramCache]: Analyzing trace with hash 12213, now seen corresponding path program 1 times [2023-08-29 21:17:07,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:17:07,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471022648] [2023-08-29 21:17:07,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:17:07,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:17:07,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:17:07,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:17:07,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:17:07,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471022648] [2023-08-29 21:17:07,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471022648] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:17:07,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:17:07,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:17:07,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523659733] [2023-08-29 21:17:07,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:17:07,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-29 21:17:07,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:17:07,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-29 21:17:07,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-29 21:17:07,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 197 [2023-08-29 21:17:07,404 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 35 transitions, 73 flow. Second operand has 2 states, 2 states have (on average 95.0) internal successors, (190), 2 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:07,404 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:17:07,404 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 197 [2023-08-29 21:17:07,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:17:07,488 INFO L130 PetriNetUnfolder]: 122/252 cut-off events. [2023-08-29 21:17:07,488 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:17:07,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 501 conditions, 252 events. 122/252 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1040 event pairs, 98 based on Foata normal form. 0/158 useless extension candidates. Maximal degree in co-relation 488. Up to 245 conditions per place. [2023-08-29 21:17:07,491 INFO L137 encePairwiseOnDemand]: 190/197 looper letters, 27 selfloop transitions, 0 changer transitions 0/28 dead transitions. [2023-08-29 21:17:07,491 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 28 transitions, 113 flow [2023-08-29 21:17:07,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-29 21:17:07,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-29 21:17:07,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 222 transitions. [2023-08-29 21:17:07,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634517766497462 [2023-08-29 21:17:07,503 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 222 transitions. [2023-08-29 21:17:07,504 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 222 transitions. [2023-08-29 21:17:07,505 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:17:07,507 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 222 transitions. [2023-08-29 21:17:07,509 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 111.0) internal successors, (222), 2 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:07,513 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 197.0) internal successors, (591), 3 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:07,513 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 197.0) internal successors, (591), 3 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:07,515 INFO L175 Difference]: Start difference. First operand has 36 places, 35 transitions, 73 flow. Second operand 2 states and 222 transitions. [2023-08-29 21:17:07,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 28 transitions, 113 flow [2023-08-29 21:17:07,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 28 transitions, 112 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 21:17:07,519 INFO L231 Difference]: Finished difference. Result has 29 places, 28 transitions, 58 flow [2023-08-29 21:17:07,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=58, PETRI_PLACES=29, PETRI_TRANSITIONS=28} [2023-08-29 21:17:07,523 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -7 predicate places. [2023-08-29 21:17:07,523 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 28 transitions, 58 flow [2023-08-29 21:17:07,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 95.0) internal successors, (190), 2 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:07,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:17:07,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 21:17:07,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-29 21:17:07,524 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-08-29 21:17:07,525 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:17:07,525 INFO L85 PathProgramCache]: Analyzing trace with hash 364060967, now seen corresponding path program 1 times [2023-08-29 21:17:07,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:17:07,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486558305] [2023-08-29 21:17:07,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:17:07,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:17:07,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:17:07,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:17:07,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:17:07,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486558305] [2023-08-29 21:17:07,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486558305] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:17:07,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:17:07,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 21:17:07,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266427030] [2023-08-29 21:17:07,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:17:07,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:17:07,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:17:07,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:17:07,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:17:07,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 197 [2023-08-29 21:17:07,614 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 28 transitions, 58 flow. Second operand has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:07,614 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:17:07,614 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 197 [2023-08-29 21:17:07,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:17:07,685 INFO L130 PetriNetUnfolder]: 122/253 cut-off events. [2023-08-29 21:17:07,686 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:17:07,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 503 conditions, 253 events. 122/253 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1043 event pairs, 98 based on Foata normal form. 0/159 useless extension candidates. Maximal degree in co-relation 500. Up to 245 conditions per place. [2023-08-29 21:17:07,688 INFO L137 encePairwiseOnDemand]: 194/197 looper letters, 26 selfloop transitions, 2 changer transitions 0/29 dead transitions. [2023-08-29 21:17:07,689 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 29 transitions, 116 flow [2023-08-29 21:17:07,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:17:07,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:17:07,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 299 transitions. [2023-08-29 21:17:07,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.505922165820643 [2023-08-29 21:17:07,696 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 299 transitions. [2023-08-29 21:17:07,696 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 299 transitions. [2023-08-29 21:17:07,697 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:17:07,697 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 299 transitions. [2023-08-29 21:17:07,699 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 99.66666666666667) internal successors, (299), 3 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:07,702 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:07,703 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:07,703 INFO L175 Difference]: Start difference. First operand has 29 places, 28 transitions, 58 flow. Second operand 3 states and 299 transitions. [2023-08-29 21:17:07,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 29 transitions, 116 flow [2023-08-29 21:17:07,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 29 transitions, 116 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 21:17:07,705 INFO L231 Difference]: Finished difference. Result has 32 places, 29 transitions, 70 flow [2023-08-29 21:17:07,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=70, PETRI_PLACES=32, PETRI_TRANSITIONS=29} [2023-08-29 21:17:07,706 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -4 predicate places. [2023-08-29 21:17:07,706 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 29 transitions, 70 flow [2023-08-29 21:17:07,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:07,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:17:07,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 21:17:07,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-29 21:17:07,707 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-08-29 21:17:07,710 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:17:07,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1599281575, now seen corresponding path program 1 times [2023-08-29 21:17:07,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:17:07,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119485535] [2023-08-29 21:17:07,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:17:07,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:17:07,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:17:07,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:17:07,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:17:07,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119485535] [2023-08-29 21:17:07,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119485535] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:17:07,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429809112] [2023-08-29 21:17:07,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:17:07,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:17:07,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:17:07,837 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 21:17:07,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-29 21:17:07,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:17:07,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-29 21:17:07,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:17:07,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:17:07,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:17:07,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:17:07,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429809112] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:17:07,989 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:17:07,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-29 21:17:07,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399118479] [2023-08-29 21:17:07,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:17:07,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 21:17:07,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:17:07,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 21:17:07,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-29 21:17:08,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 197 [2023-08-29 21:17:08,025 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 29 transitions, 70 flow. Second operand has 7 states, 7 states have (on average 90.57142857142857) internal successors, (634), 7 states have internal predecessors, (634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:08,025 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:17:08,025 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 197 [2023-08-29 21:17:08,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:17:08,108 INFO L130 PetriNetUnfolder]: 122/256 cut-off events. [2023-08-29 21:17:08,109 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:17:08,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 519 conditions, 256 events. 122/256 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1043 event pairs, 98 based on Foata normal form. 0/162 useless extension candidates. Maximal degree in co-relation 514. Up to 245 conditions per place. [2023-08-29 21:17:08,111 INFO L137 encePairwiseOnDemand]: 194/197 looper letters, 26 selfloop transitions, 5 changer transitions 0/32 dead transitions. [2023-08-29 21:17:08,111 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 32 transitions, 144 flow [2023-08-29 21:17:08,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 21:17:08,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 21:17:08,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 568 transitions. [2023-08-29 21:17:08,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4805414551607445 [2023-08-29 21:17:08,113 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 568 transitions. [2023-08-29 21:17:08,113 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 568 transitions. [2023-08-29 21:17:08,114 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:17:08,114 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 568 transitions. [2023-08-29 21:17:08,115 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 94.66666666666667) internal successors, (568), 6 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:08,117 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 197.0) internal successors, (1379), 7 states have internal predecessors, (1379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:08,118 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 197.0) internal successors, (1379), 7 states have internal predecessors, (1379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:08,118 INFO L175 Difference]: Start difference. First operand has 32 places, 29 transitions, 70 flow. Second operand 6 states and 568 transitions. [2023-08-29 21:17:08,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 32 transitions, 144 flow [2023-08-29 21:17:08,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 32 transitions, 140 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-29 21:17:08,120 INFO L231 Difference]: Finished difference. Result has 39 places, 32 transitions, 102 flow [2023-08-29 21:17:08,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=102, PETRI_PLACES=39, PETRI_TRANSITIONS=32} [2023-08-29 21:17:08,121 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 3 predicate places. [2023-08-29 21:17:08,121 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 32 transitions, 102 flow [2023-08-29 21:17:08,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 90.57142857142857) internal successors, (634), 7 states have internal predecessors, (634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:08,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:17:08,122 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1] [2023-08-29 21:17:08,132 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-29 21:17:08,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:17:08,327 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-08-29 21:17:08,328 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:17:08,328 INFO L85 PathProgramCache]: Analyzing trace with hash -392962649, now seen corresponding path program 2 times [2023-08-29 21:17:08,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:17:08,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994815783] [2023-08-29 21:17:08,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:17:08,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:17:08,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:17:08,477 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:17:08,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:17:08,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994815783] [2023-08-29 21:17:08,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994815783] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:17:08,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401314475] [2023-08-29 21:17:08,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 21:17:08,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:17:08,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:17:08,479 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 21:17:08,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-29 21:17:08,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-29 21:17:08,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 21:17:08,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-29 21:17:08,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:17:08,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 21:17:08,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 21:17:08,729 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-29 21:17:08,729 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 21:17:08,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401314475] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:17:08,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-29 21:17:08,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 9 [2023-08-29 21:17:08,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822586941] [2023-08-29 21:17:08,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:17:08,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 21:17:08,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:17:08,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 21:17:08,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2023-08-29 21:17:08,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 197 [2023-08-29 21:17:08,855 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 32 transitions, 102 flow. Second operand has 5 states, 5 states have (on average 87.2) internal successors, (436), 5 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:08,855 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:17:08,855 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 197 [2023-08-29 21:17:08,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:17:08,997 INFO L130 PetriNetUnfolder]: 184/400 cut-off events. [2023-08-29 21:17:08,997 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 21:17:08,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 800 conditions, 400 events. 184/400 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1852 event pairs, 91 based on Foata normal form. 0/279 useless extension candidates. Maximal degree in co-relation 792. Up to 232 conditions per place. [2023-08-29 21:17:09,000 INFO L137 encePairwiseOnDemand]: 191/197 looper letters, 46 selfloop transitions, 3 changer transitions 0/50 dead transitions. [2023-08-29 21:17:09,000 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 50 transitions, 236 flow [2023-08-29 21:17:09,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 21:17:09,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 21:17:09,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 393 transitions. [2023-08-29 21:17:09,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4987309644670051 [2023-08-29 21:17:09,003 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 393 transitions. [2023-08-29 21:17:09,003 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 393 transitions. [2023-08-29 21:17:09,003 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:17:09,003 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 393 transitions. [2023-08-29 21:17:09,004 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 98.25) internal successors, (393), 4 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:09,006 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 197.0) internal successors, (985), 5 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:09,006 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 197.0) internal successors, (985), 5 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:09,006 INFO L175 Difference]: Start difference. First operand has 39 places, 32 transitions, 102 flow. Second operand 4 states and 393 transitions. [2023-08-29 21:17:09,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 50 transitions, 236 flow [2023-08-29 21:17:09,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 50 transitions, 222 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-29 21:17:09,008 INFO L231 Difference]: Finished difference. Result has 41 places, 32 transitions, 102 flow [2023-08-29 21:17:09,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=102, PETRI_PLACES=41, PETRI_TRANSITIONS=32} [2023-08-29 21:17:09,009 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 5 predicate places. [2023-08-29 21:17:09,009 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 32 transitions, 102 flow [2023-08-29 21:17:09,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 87.2) internal successors, (436), 5 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:09,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:17:09,010 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1] [2023-08-29 21:17:09,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-29 21:17:09,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-08-29 21:17:09,214 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-08-29 21:17:09,215 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:17:09,215 INFO L85 PathProgramCache]: Analyzing trace with hash -392962415, now seen corresponding path program 1 times [2023-08-29 21:17:09,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:17:09,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412927022] [2023-08-29 21:17:09,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:17:09,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:17:09,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:17:09,263 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-29 21:17:09,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:17:09,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412927022] [2023-08-29 21:17:09,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412927022] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:17:09,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:17:09,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 21:17:09,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620629774] [2023-08-29 21:17:09,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:17:09,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:17:09,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:17:09,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:17:09,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:17:09,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 197 [2023-08-29 21:17:09,279 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 32 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:09,279 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:17:09,279 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 197 [2023-08-29 21:17:09,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:17:09,387 INFO L130 PetriNetUnfolder]: 262/532 cut-off events. [2023-08-29 21:17:09,387 INFO L131 PetriNetUnfolder]: For 119/119 co-relation queries the response was YES. [2023-08-29 21:17:09,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1204 conditions, 532 events. 262/532 cut-off events. For 119/119 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2425 event pairs, 156 based on Foata normal form. 0/381 useless extension candidates. Maximal degree in co-relation 1194. Up to 373 conditions per place. [2023-08-29 21:17:09,392 INFO L137 encePairwiseOnDemand]: 193/197 looper letters, 44 selfloop transitions, 2 changer transitions 0/47 dead transitions. [2023-08-29 21:17:09,393 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 47 transitions, 236 flow [2023-08-29 21:17:09,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:17:09,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:17:09,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 309 transitions. [2023-08-29 21:17:09,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5228426395939086 [2023-08-29 21:17:09,395 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 309 transitions. [2023-08-29 21:17:09,396 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 309 transitions. [2023-08-29 21:17:09,396 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:17:09,396 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 309 transitions. [2023-08-29 21:17:09,397 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:09,399 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:09,400 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:09,400 INFO L175 Difference]: Start difference. First operand has 41 places, 32 transitions, 102 flow. Second operand 3 states and 309 transitions. [2023-08-29 21:17:09,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 47 transitions, 236 flow [2023-08-29 21:17:09,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 47 transitions, 230 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:17:09,404 INFO L231 Difference]: Finished difference. Result has 42 places, 33 transitions, 112 flow [2023-08-29 21:17:09,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=42, PETRI_TRANSITIONS=33} [2023-08-29 21:17:09,406 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 6 predicate places. [2023-08-29 21:17:09,406 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 33 transitions, 112 flow [2023-08-29 21:17:09,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:09,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:17:09,407 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1] [2023-08-29 21:17:09,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-29 21:17:09,407 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-08-29 21:17:09,408 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:17:09,408 INFO L85 PathProgramCache]: Analyzing trace with hash -392962399, now seen corresponding path program 1 times [2023-08-29 21:17:09,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:17:09,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515758642] [2023-08-29 21:17:09,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:17:09,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:17:09,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:17:09,489 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:17:09,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:17:09,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515758642] [2023-08-29 21:17:09,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515758642] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:17:09,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568782463] [2023-08-29 21:17:09,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:17:09,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:17:09,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:17:09,492 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 21:17:09,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-29 21:17:09,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:17:09,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-29 21:17:09,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:17:09,585 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:17:09,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:17:09,632 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:17:09,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568782463] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:17:09,633 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:17:09,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-29 21:17:09,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008443113] [2023-08-29 21:17:09,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:17:09,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-29 21:17:09,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:17:09,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-29 21:17:09,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-29 21:17:09,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 197 [2023-08-29 21:17:09,670 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 33 transitions, 112 flow. Second operand has 13 states, 13 states have (on average 90.3076923076923) internal successors, (1174), 13 states have internal predecessors, (1174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:09,670 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:17:09,670 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 197 [2023-08-29 21:17:09,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:17:09,787 INFO L130 PetriNetUnfolder]: 262/553 cut-off events. [2023-08-29 21:17:09,788 INFO L131 PetriNetUnfolder]: For 130/130 co-relation queries the response was YES. [2023-08-29 21:17:09,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1301 conditions, 553 events. 262/553 cut-off events. For 130/130 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2459 event pairs, 228 based on Foata normal form. 6/421 useless extension candidates. Maximal degree in co-relation 1290. Up to 525 conditions per place. [2023-08-29 21:17:09,791 INFO L137 encePairwiseOnDemand]: 194/197 looper letters, 27 selfloop transitions, 11 changer transitions 0/39 dead transitions. [2023-08-29 21:17:09,791 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 39 transitions, 224 flow [2023-08-29 21:17:09,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-29 21:17:09,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-29 21:17:09,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1110 transitions. [2023-08-29 21:17:09,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46954314720812185 [2023-08-29 21:17:09,794 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1110 transitions. [2023-08-29 21:17:09,794 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1110 transitions. [2023-08-29 21:17:09,795 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:17:09,795 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1110 transitions. [2023-08-29 21:17:09,797 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 92.5) internal successors, (1110), 12 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:09,800 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 197.0) internal successors, (2561), 13 states have internal predecessors, (2561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:09,801 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 197.0) internal successors, (2561), 13 states have internal predecessors, (2561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:09,801 INFO L175 Difference]: Start difference. First operand has 42 places, 33 transitions, 112 flow. Second operand 12 states and 1110 transitions. [2023-08-29 21:17:09,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 39 transitions, 224 flow [2023-08-29 21:17:09,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 39 transitions, 222 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 21:17:09,803 INFO L231 Difference]: Finished difference. Result has 58 places, 39 transitions, 194 flow [2023-08-29 21:17:09,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=194, PETRI_PLACES=58, PETRI_TRANSITIONS=39} [2023-08-29 21:17:09,804 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 22 predicate places. [2023-08-29 21:17:09,804 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 39 transitions, 194 flow [2023-08-29 21:17:09,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 90.3076923076923) internal successors, (1174), 13 states have internal predecessors, (1174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:09,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:17:09,805 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1] [2023-08-29 21:17:09,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-29 21:17:10,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:17:10,010 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-08-29 21:17:10,010 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:17:10,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1005534879, now seen corresponding path program 2 times [2023-08-29 21:17:10,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:17:10,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928181495] [2023-08-29 21:17:10,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:17:10,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:17:10,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:17:10,142 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-29 21:17:10,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:17:10,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928181495] [2023-08-29 21:17:10,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928181495] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:17:10,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:17:10,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 21:17:10,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329231047] [2023-08-29 21:17:10,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:17:10,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 21:17:10,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:17:10,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 21:17:10,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 21:17:10,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 197 [2023-08-29 21:17:10,216 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 39 transitions, 194 flow. Second operand has 4 states, 4 states have (on average 91.5) internal successors, (366), 4 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:10,216 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:17:10,216 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 197 [2023-08-29 21:17:10,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:17:10,313 INFO L130 PetriNetUnfolder]: 223/472 cut-off events. [2023-08-29 21:17:10,314 INFO L131 PetriNetUnfolder]: For 104/104 co-relation queries the response was YES. [2023-08-29 21:17:10,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1131 conditions, 472 events. 223/472 cut-off events. For 104/104 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1969 event pairs, 168 based on Foata normal form. 0/382 useless extension candidates. Maximal degree in co-relation 1114. Up to 404 conditions per place. [2023-08-29 21:17:10,317 INFO L137 encePairwiseOnDemand]: 192/197 looper letters, 42 selfloop transitions, 3 changer transitions 0/46 dead transitions. [2023-08-29 21:17:10,317 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 46 transitions, 306 flow [2023-08-29 21:17:10,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:17:10,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:17:10,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 304 transitions. [2023-08-29 21:17:10,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5143824027072758 [2023-08-29 21:17:10,318 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 304 transitions. [2023-08-29 21:17:10,319 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 304 transitions. [2023-08-29 21:17:10,319 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:17:10,319 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 304 transitions. [2023-08-29 21:17:10,320 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:10,321 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:10,321 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:10,321 INFO L175 Difference]: Start difference. First operand has 58 places, 39 transitions, 194 flow. Second operand 3 states and 304 transitions. [2023-08-29 21:17:10,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 46 transitions, 306 flow [2023-08-29 21:17:10,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 46 transitions, 258 flow, removed 19 selfloop flow, removed 5 redundant places. [2023-08-29 21:17:10,325 INFO L231 Difference]: Finished difference. Result has 53 places, 37 transitions, 146 flow [2023-08-29 21:17:10,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=53, PETRI_TRANSITIONS=37} [2023-08-29 21:17:10,325 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 17 predicate places. [2023-08-29 21:17:10,325 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 37 transitions, 146 flow [2023-08-29 21:17:10,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 91.5) internal successors, (366), 4 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:10,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:17:10,326 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1] [2023-08-29 21:17:10,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-29 21:17:10,326 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-08-29 21:17:10,326 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:17:10,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1005534878, now seen corresponding path program 1 times [2023-08-29 21:17:10,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:17:10,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749602366] [2023-08-29 21:17:10,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:17:10,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:17:10,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:17:10,494 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-29 21:17:10,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:17:10,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749602366] [2023-08-29 21:17:10,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749602366] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:17:10,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:17:10,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 21:17:10,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567969772] [2023-08-29 21:17:10,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:17:10,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 21:17:10,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:17:10,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 21:17:10,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-29 21:17:10,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 197 [2023-08-29 21:17:10,573 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 37 transitions, 146 flow. Second operand has 5 states, 5 states have (on average 86.2) internal successors, (431), 5 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:10,573 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:17:10,573 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 197 [2023-08-29 21:17:10,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:17:10,685 INFO L130 PetriNetUnfolder]: 210/434 cut-off events. [2023-08-29 21:17:10,686 INFO L131 PetriNetUnfolder]: For 127/127 co-relation queries the response was YES. [2023-08-29 21:17:10,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1065 conditions, 434 events. 210/434 cut-off events. For 127/127 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1765 event pairs, 132 based on Foata normal form. 0/360 useless extension candidates. Maximal degree in co-relation 1048. Up to 326 conditions per place. [2023-08-29 21:17:10,688 INFO L137 encePairwiseOnDemand]: 193/197 looper letters, 45 selfloop transitions, 3 changer transitions 0/49 dead transitions. [2023-08-29 21:17:10,688 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 49 transitions, 276 flow [2023-08-29 21:17:10,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 21:17:10,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 21:17:10,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 377 transitions. [2023-08-29 21:17:10,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4784263959390863 [2023-08-29 21:17:10,690 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 377 transitions. [2023-08-29 21:17:10,690 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 377 transitions. [2023-08-29 21:17:10,691 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:17:10,691 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 377 transitions. [2023-08-29 21:17:10,691 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 94.25) internal successors, (377), 4 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:10,693 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 197.0) internal successors, (985), 5 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:10,693 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 197.0) internal successors, (985), 5 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:10,693 INFO L175 Difference]: Start difference. First operand has 53 places, 37 transitions, 146 flow. Second operand 4 states and 377 transitions. [2023-08-29 21:17:10,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 49 transitions, 276 flow [2023-08-29 21:17:10,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 49 transitions, 270 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:17:10,697 INFO L231 Difference]: Finished difference. Result has 55 places, 37 transitions, 150 flow [2023-08-29 21:17:10,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=150, PETRI_PLACES=55, PETRI_TRANSITIONS=37} [2023-08-29 21:17:10,699 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 19 predicate places. [2023-08-29 21:17:10,699 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 37 transitions, 150 flow [2023-08-29 21:17:10,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 86.2) internal successors, (431), 5 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:10,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:17:10,700 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2023-08-29 21:17:10,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-29 21:17:10,700 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-08-29 21:17:10,701 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:17:10,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1106817676, now seen corresponding path program 1 times [2023-08-29 21:17:10,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:17:10,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159257280] [2023-08-29 21:17:10,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:17:10,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:17:10,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:17:10,823 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-29 21:17:10,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:17:10,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159257280] [2023-08-29 21:17:10,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159257280] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:17:10,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:17:10,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 21:17:10,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840801962] [2023-08-29 21:17:10,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:17:10,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 21:17:10,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:17:10,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 21:17:10,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-29 21:17:10,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 197 [2023-08-29 21:17:10,907 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 37 transitions, 150 flow. Second operand has 5 states, 5 states have (on average 85.4) internal successors, (427), 5 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:10,907 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:17:10,907 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 197 [2023-08-29 21:17:10,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:17:11,028 INFO L130 PetriNetUnfolder]: 180/388 cut-off events. [2023-08-29 21:17:11,028 INFO L131 PetriNetUnfolder]: For 186/186 co-relation queries the response was YES. [2023-08-29 21:17:11,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 996 conditions, 388 events. 180/388 cut-off events. For 186/186 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1535 event pairs, 13 based on Foata normal form. 0/351 useless extension candidates. Maximal degree in co-relation 978. Up to 266 conditions per place. [2023-08-29 21:17:11,030 INFO L137 encePairwiseOnDemand]: 188/197 looper letters, 55 selfloop transitions, 10 changer transitions 0/65 dead transitions. [2023-08-29 21:17:11,031 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 65 transitions, 370 flow [2023-08-29 21:17:11,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 21:17:11,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 21:17:11,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 473 transitions. [2023-08-29 21:17:11,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48020304568527916 [2023-08-29 21:17:11,033 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 473 transitions. [2023-08-29 21:17:11,033 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 473 transitions. [2023-08-29 21:17:11,033 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:17:11,033 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 473 transitions. [2023-08-29 21:17:11,035 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 94.6) internal successors, (473), 5 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:11,036 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 197.0) internal successors, (1182), 6 states have internal predecessors, (1182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:11,037 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 197.0) internal successors, (1182), 6 states have internal predecessors, (1182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:11,037 INFO L175 Difference]: Start difference. First operand has 55 places, 37 transitions, 150 flow. Second operand 5 states and 473 transitions. [2023-08-29 21:17:11,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 65 transitions, 370 flow [2023-08-29 21:17:11,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 65 transitions, 360 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 21:17:11,041 INFO L231 Difference]: Finished difference. Result has 60 places, 44 transitions, 216 flow [2023-08-29 21:17:11,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=216, PETRI_PLACES=60, PETRI_TRANSITIONS=44} [2023-08-29 21:17:11,042 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 24 predicate places. [2023-08-29 21:17:11,042 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 44 transitions, 216 flow [2023-08-29 21:17:11,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 85.4) internal successors, (427), 5 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:11,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:17:11,043 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:17:11,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-29 21:17:11,043 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-08-29 21:17:11,043 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:17:11,043 INFO L85 PathProgramCache]: Analyzing trace with hash -522908067, now seen corresponding path program 1 times [2023-08-29 21:17:11,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:17:11,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865875089] [2023-08-29 21:17:11,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:17:11,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:17:11,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:17:11,381 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-29 21:17:11,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:17:11,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865875089] [2023-08-29 21:17:11,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865875089] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:17:11,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958251868] [2023-08-29 21:17:11,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:17:11,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:17:11,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:17:11,385 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 21:17:11,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-29 21:17:11,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:17:11,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-29 21:17:11,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:17:11,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 21:17:11,608 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 21:17:11,686 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-29 21:17:11,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:17:13,964 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-29 21:17:13,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958251868] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:17:13,965 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:17:13,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 13 [2023-08-29 21:17:13,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575206799] [2023-08-29 21:17:13,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:17:13,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-29 21:17:13,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:17:13,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-29 21:17:13,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2023-08-29 21:17:14,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 197 [2023-08-29 21:17:14,580 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 44 transitions, 216 flow. Second operand has 15 states, 15 states have (on average 83.0) internal successors, (1245), 15 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:14,580 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:17:14,580 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 197 [2023-08-29 21:17:14,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:17:14,897 INFO L130 PetriNetUnfolder]: 312/652 cut-off events. [2023-08-29 21:17:14,898 INFO L131 PetriNetUnfolder]: For 559/559 co-relation queries the response was YES. [2023-08-29 21:17:14,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1923 conditions, 652 events. 312/652 cut-off events. For 559/559 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 2480 event pairs, 100 based on Foata normal form. 66/707 useless extension candidates. Maximal degree in co-relation 1902. Up to 296 conditions per place. [2023-08-29 21:17:14,902 INFO L137 encePairwiseOnDemand]: 191/197 looper letters, 96 selfloop transitions, 7 changer transitions 0/104 dead transitions. [2023-08-29 21:17:14,902 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 104 transitions, 668 flow [2023-08-29 21:17:14,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-29 21:17:14,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-29 21:17:14,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 729 transitions. [2023-08-29 21:17:14,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46256345177664976 [2023-08-29 21:17:14,905 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 729 transitions. [2023-08-29 21:17:14,905 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 729 transitions. [2023-08-29 21:17:14,906 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:17:14,906 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 729 transitions. [2023-08-29 21:17:14,907 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 91.125) internal successors, (729), 8 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:14,910 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 197.0) internal successors, (1773), 9 states have internal predecessors, (1773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:14,910 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 197.0) internal successors, (1773), 9 states have internal predecessors, (1773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:14,911 INFO L175 Difference]: Start difference. First operand has 60 places, 44 transitions, 216 flow. Second operand 8 states and 729 transitions. [2023-08-29 21:17:14,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 104 transitions, 668 flow [2023-08-29 21:17:14,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 104 transitions, 668 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 21:17:14,914 INFO L231 Difference]: Finished difference. Result has 71 places, 48 transitions, 268 flow [2023-08-29 21:17:14,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=268, PETRI_PLACES=71, PETRI_TRANSITIONS=48} [2023-08-29 21:17:14,915 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 35 predicate places. [2023-08-29 21:17:14,915 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 48 transitions, 268 flow [2023-08-29 21:17:14,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 83.0) internal successors, (1245), 15 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:14,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:17:14,916 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:17:14,927 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-29 21:17:15,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:17:15,128 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-08-29 21:17:15,128 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:17:15,128 INFO L85 PathProgramCache]: Analyzing trace with hash -740396165, now seen corresponding path program 1 times [2023-08-29 21:17:15,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:17:15,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670047666] [2023-08-29 21:17:15,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:17:15,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:17:15,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:17:15,381 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-29 21:17:15,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:17:15,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670047666] [2023-08-29 21:17:15,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670047666] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:17:15,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948167665] [2023-08-29 21:17:15,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:17:15,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:17:15,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:17:15,384 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 21:17:15,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-29 21:17:15,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:17:15,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-29 21:17:15,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:17:15,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 21:17:15,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 21:17:15,644 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-29 21:17:15,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:17:15,887 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-29 21:17:15,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948167665] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:17:15,887 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:17:15,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 13 [2023-08-29 21:17:15,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860109650] [2023-08-29 21:17:15,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:17:15,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-29 21:17:15,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:17:15,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-29 21:17:15,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2023-08-29 21:17:16,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 197 [2023-08-29 21:17:16,446 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 48 transitions, 268 flow. Second operand has 15 states, 15 states have (on average 84.0) internal successors, (1260), 15 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:16,447 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:17:16,447 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 197 [2023-08-29 21:17:16,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:17:16,854 INFO L130 PetriNetUnfolder]: 648/1354 cut-off events. [2023-08-29 21:17:16,855 INFO L131 PetriNetUnfolder]: For 1734/1734 co-relation queries the response was YES. [2023-08-29 21:17:16,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4440 conditions, 1354 events. 648/1354 cut-off events. For 1734/1734 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 6394 event pairs, 150 based on Foata normal form. 180/1511 useless extension candidates. Maximal degree in co-relation 4414. Up to 420 conditions per place. [2023-08-29 21:17:16,866 INFO L137 encePairwiseOnDemand]: 191/197 looper letters, 154 selfloop transitions, 8 changer transitions 0/163 dead transitions. [2023-08-29 21:17:16,866 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 163 transitions, 1222 flow [2023-08-29 21:17:16,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-29 21:17:16,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-29 21:17:16,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 766 transitions. [2023-08-29 21:17:16,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4860406091370558 [2023-08-29 21:17:16,869 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 766 transitions. [2023-08-29 21:17:16,869 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 766 transitions. [2023-08-29 21:17:16,869 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:17:16,869 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 766 transitions. [2023-08-29 21:17:16,871 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 95.75) internal successors, (766), 8 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:16,873 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 197.0) internal successors, (1773), 9 states have internal predecessors, (1773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:16,874 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 197.0) internal successors, (1773), 9 states have internal predecessors, (1773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:16,874 INFO L175 Difference]: Start difference. First operand has 71 places, 48 transitions, 268 flow. Second operand 8 states and 766 transitions. [2023-08-29 21:17:16,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 163 transitions, 1222 flow [2023-08-29 21:17:16,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 163 transitions, 1173 flow, removed 18 selfloop flow, removed 2 redundant places. [2023-08-29 21:17:16,881 INFO L231 Difference]: Finished difference. Result has 80 places, 52 transitions, 324 flow [2023-08-29 21:17:16,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=324, PETRI_PLACES=80, PETRI_TRANSITIONS=52} [2023-08-29 21:17:16,881 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 44 predicate places. [2023-08-29 21:17:16,881 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 52 transitions, 324 flow [2023-08-29 21:17:16,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 84.0) internal successors, (1260), 15 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:16,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:17:16,882 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2023-08-29 21:17:16,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-29 21:17:17,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-08-29 21:17:17,088 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-08-29 21:17:17,088 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:17:17,089 INFO L85 PathProgramCache]: Analyzing trace with hash -664849330, now seen corresponding path program 2 times [2023-08-29 21:17:17,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:17:17,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910367735] [2023-08-29 21:17:17,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:17:17,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:17:17,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:17:17,599 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-29 21:17:17,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:17:17,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910367735] [2023-08-29 21:17:17,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910367735] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:17:17,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488774078] [2023-08-29 21:17:17,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 21:17:17,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:17:17,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:17:17,601 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) [2023-08-29 21:17:17,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-29 21:17:17,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 21:17:17,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 21:17:17,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-29 21:17:17,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:17:17,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 21:17:17,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 21:17:18,017 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-29 21:17:18,017 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 21:17:18,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488774078] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:17:18,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-29 21:17:18,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 16 [2023-08-29 21:17:18,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839084013] [2023-08-29 21:17:18,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:17:18,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-29 21:17:18,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:17:18,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-29 21:17:18,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2023-08-29 21:17:18,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 197 [2023-08-29 21:17:18,215 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 52 transitions, 324 flow. Second operand has 9 states, 9 states have (on average 87.44444444444444) internal successors, (787), 9 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:18,215 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:17:18,216 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 197 [2023-08-29 21:17:18,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:17:18,563 INFO L130 PetriNetUnfolder]: 625/1308 cut-off events. [2023-08-29 21:17:18,564 INFO L131 PetriNetUnfolder]: For 3074/3074 co-relation queries the response was YES. [2023-08-29 21:17:18,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4735 conditions, 1308 events. 625/1308 cut-off events. For 3074/3074 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 5983 event pairs, 0 based on Foata normal form. 23/1308 useless extension candidates. Maximal degree in co-relation 4705. Up to 525 conditions per place. [2023-08-29 21:17:18,574 INFO L137 encePairwiseOnDemand]: 193/197 looper letters, 115 selfloop transitions, 6 changer transitions 0/122 dead transitions. [2023-08-29 21:17:18,574 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 122 transitions, 1034 flow [2023-08-29 21:17:18,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-29 21:17:18,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-29 21:17:18,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 755 transitions. [2023-08-29 21:17:18,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47906091370558374 [2023-08-29 21:17:18,577 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 755 transitions. [2023-08-29 21:17:18,578 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 755 transitions. [2023-08-29 21:17:18,578 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:17:18,578 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 755 transitions. [2023-08-29 21:17:18,580 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 94.375) internal successors, (755), 8 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:18,582 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 197.0) internal successors, (1773), 9 states have internal predecessors, (1773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:18,582 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 197.0) internal successors, (1773), 9 states have internal predecessors, (1773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:18,582 INFO L175 Difference]: Start difference. First operand has 80 places, 52 transitions, 324 flow. Second operand 8 states and 755 transitions. [2023-08-29 21:17:18,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 122 transitions, 1034 flow [2023-08-29 21:17:18,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 122 transitions, 981 flow, removed 19 selfloop flow, removed 3 redundant places. [2023-08-29 21:17:18,592 INFO L231 Difference]: Finished difference. Result has 83 places, 51 transitions, 313 flow [2023-08-29 21:17:18,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=301, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=313, PETRI_PLACES=83, PETRI_TRANSITIONS=51} [2023-08-29 21:17:18,594 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 47 predicate places. [2023-08-29 21:17:18,594 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 51 transitions, 313 flow [2023-08-29 21:17:18,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 87.44444444444444) internal successors, (787), 9 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:18,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:17:18,595 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2023-08-29 21:17:18,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-29 21:17:18,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:17:18,800 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-08-29 21:17:18,800 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:17:18,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1988989111, now seen corresponding path program 2 times [2023-08-29 21:17:18,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:17:18,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983149444] [2023-08-29 21:17:18,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:17:18,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:17:18,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:17:19,211 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-29 21:17:19,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:17:19,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983149444] [2023-08-29 21:17:19,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983149444] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:17:19,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598609445] [2023-08-29 21:17:19,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 21:17:19,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:17:19,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:17:19,213 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) [2023-08-29 21:17:19,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-29 21:17:19,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 21:17:19,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 21:17:19,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-29 21:17:19,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:17:19,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 21:17:19,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 21:17:19,673 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-29 21:17:19,673 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 21:17:19,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598609445] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:17:19,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-29 21:17:19,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 16 [2023-08-29 21:17:19,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531725566] [2023-08-29 21:17:19,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:17:19,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-29 21:17:19,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:17:19,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-29 21:17:19,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2023-08-29 21:17:19,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 197 [2023-08-29 21:17:19,865 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 51 transitions, 313 flow. Second operand has 9 states, 9 states have (on average 88.44444444444444) internal successors, (796), 9 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:19,865 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:17:19,865 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 197 [2023-08-29 21:17:19,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:17:20,243 INFO L130 PetriNetUnfolder]: 596/1252 cut-off events. [2023-08-29 21:17:20,244 INFO L131 PetriNetUnfolder]: For 2078/2078 co-relation queries the response was YES. [2023-08-29 21:17:20,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4422 conditions, 1252 events. 596/1252 cut-off events. For 2078/2078 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 5764 event pairs, 0 based on Foata normal form. 29/1259 useless extension candidates. Maximal degree in co-relation 4393. Up to 309 conditions per place. [2023-08-29 21:17:20,254 INFO L137 encePairwiseOnDemand]: 193/197 looper letters, 148 selfloop transitions, 6 changer transitions 0/155 dead transitions. [2023-08-29 21:17:20,254 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 155 transitions, 1163 flow [2023-08-29 21:17:20,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-29 21:17:20,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-29 21:17:20,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 786 transitions. [2023-08-29 21:17:20,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4987309644670051 [2023-08-29 21:17:20,257 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 786 transitions. [2023-08-29 21:17:20,257 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 786 transitions. [2023-08-29 21:17:20,257 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:17:20,257 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 786 transitions. [2023-08-29 21:17:20,259 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 98.25) internal successors, (786), 8 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:20,261 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 197.0) internal successors, (1773), 9 states have internal predecessors, (1773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:20,262 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 197.0) internal successors, (1773), 9 states have internal predecessors, (1773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:20,262 INFO L175 Difference]: Start difference. First operand has 83 places, 51 transitions, 313 flow. Second operand 8 states and 786 transitions. [2023-08-29 21:17:20,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 155 transitions, 1163 flow [2023-08-29 21:17:20,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 155 transitions, 1107 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-29 21:17:20,269 INFO L231 Difference]: Finished difference. Result has 83 places, 49 transitions, 288 flow [2023-08-29 21:17:20,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=288, PETRI_PLACES=83, PETRI_TRANSITIONS=49} [2023-08-29 21:17:20,270 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 47 predicate places. [2023-08-29 21:17:20,270 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 49 transitions, 288 flow [2023-08-29 21:17:20,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 88.44444444444444) internal successors, (796), 9 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:20,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:17:20,271 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:17:20,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-29 21:17:20,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:17:20,475 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-08-29 21:17:20,476 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:17:20,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1880032769, now seen corresponding path program 1 times [2023-08-29 21:17:20,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:17:20,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565236759] [2023-08-29 21:17:20,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:17:20,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:17:20,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:17:20,574 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-29 21:17:20,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:17:20,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565236759] [2023-08-29 21:17:20,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565236759] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:17:20,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970827370] [2023-08-29 21:17:20,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:17:20,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:17:20,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:17:20,576 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) [2023-08-29 21:17:20,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-29 21:17:20,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:17:20,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-29 21:17:20,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:17:20,732 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-29 21:17:20,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:17:20,793 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-29 21:17:20,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970827370] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:17:20,794 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:17:20,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-08-29 21:17:20,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287648980] [2023-08-29 21:17:20,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:17:20,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-29 21:17:20,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:17:20,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-29 21:17:20,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-29 21:17:20,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 197 [2023-08-29 21:17:20,823 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 49 transitions, 288 flow. Second operand has 13 states, 13 states have (on average 91.76923076923077) internal successors, (1193), 13 states have internal predecessors, (1193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:20,823 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:17:20,823 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 197 [2023-08-29 21:17:20,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:17:21,284 INFO L130 PetriNetUnfolder]: 1058/2176 cut-off events. [2023-08-29 21:17:21,285 INFO L131 PetriNetUnfolder]: For 4992/4992 co-relation queries the response was YES. [2023-08-29 21:17:21,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7643 conditions, 2176 events. 1058/2176 cut-off events. For 4992/4992 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 9705 event pairs, 125 based on Foata normal form. 132/2286 useless extension candidates. Maximal degree in co-relation 7614. Up to 491 conditions per place. [2023-08-29 21:17:21,300 INFO L137 encePairwiseOnDemand]: 193/197 looper letters, 178 selfloop transitions, 12 changer transitions 0/191 dead transitions. [2023-08-29 21:17:21,301 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 191 transitions, 1570 flow [2023-08-29 21:17:21,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-29 21:17:21,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-29 21:17:21,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1181 transitions. [2023-08-29 21:17:21,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49957698815566837 [2023-08-29 21:17:21,305 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1181 transitions. [2023-08-29 21:17:21,305 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1181 transitions. [2023-08-29 21:17:21,306 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:17:21,306 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1181 transitions. [2023-08-29 21:17:21,308 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 98.41666666666667) internal successors, (1181), 12 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:21,312 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 197.0) internal successors, (2561), 13 states have internal predecessors, (2561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:21,312 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 197.0) internal successors, (2561), 13 states have internal predecessors, (2561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:21,312 INFO L175 Difference]: Start difference. First operand has 83 places, 49 transitions, 288 flow. Second operand 12 states and 1181 transitions. [2023-08-29 21:17:21,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 191 transitions, 1570 flow [2023-08-29 21:17:21,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 191 transitions, 1469 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-29 21:17:21,320 INFO L231 Difference]: Finished difference. Result has 95 places, 55 transitions, 365 flow [2023-08-29 21:17:21,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=277, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=365, PETRI_PLACES=95, PETRI_TRANSITIONS=55} [2023-08-29 21:17:21,321 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 59 predicate places. [2023-08-29 21:17:21,321 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 55 transitions, 365 flow [2023-08-29 21:17:21,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 91.76923076923077) internal successors, (1193), 13 states have internal predecessors, (1193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:21,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:17:21,322 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:17:21,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-29 21:17:21,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-29 21:17:21,527 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-08-29 21:17:21,527 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:17:21,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1520440221, now seen corresponding path program 2 times [2023-08-29 21:17:21,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:17:21,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958112809] [2023-08-29 21:17:21,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:17:21,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:17:21,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:17:21,770 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2023-08-29 21:17:21,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:17:21,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958112809] [2023-08-29 21:17:21,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958112809] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:17:21,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:17:21,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 21:17:21,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295833222] [2023-08-29 21:17:21,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:17:21,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 21:17:21,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:17:21,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 21:17:21,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 21:17:21,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 197 [2023-08-29 21:17:21,819 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 55 transitions, 365 flow. Second operand has 4 states, 4 states have (on average 89.5) internal successors, (358), 4 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:21,819 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:17:21,819 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 197 [2023-08-29 21:17:21,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:17:22,190 INFO L130 PetriNetUnfolder]: 1036/2107 cut-off events. [2023-08-29 21:17:22,191 INFO L131 PetriNetUnfolder]: For 5134/5134 co-relation queries the response was YES. [2023-08-29 21:17:22,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7949 conditions, 2107 events. 1036/2107 cut-off events. For 5134/5134 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 9758 event pairs, 945 based on Foata normal form. 0/2107 useless extension candidates. Maximal degree in co-relation 7914. Up to 2026 conditions per place. [2023-08-29 21:17:22,208 INFO L137 encePairwiseOnDemand]: 193/197 looper letters, 55 selfloop transitions, 4 changer transitions 2/62 dead transitions. [2023-08-29 21:17:22,208 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 62 transitions, 533 flow [2023-08-29 21:17:22,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 21:17:22,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 21:17:22,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 372 transitions. [2023-08-29 21:17:22,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4720812182741117 [2023-08-29 21:17:22,210 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 372 transitions. [2023-08-29 21:17:22,211 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 372 transitions. [2023-08-29 21:17:22,211 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:17:22,211 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 372 transitions. [2023-08-29 21:17:22,212 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 93.0) internal successors, (372), 4 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:22,213 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 197.0) internal successors, (985), 5 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:22,213 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 197.0) internal successors, (985), 5 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:22,213 INFO L175 Difference]: Start difference. First operand has 95 places, 55 transitions, 365 flow. Second operand 4 states and 372 transitions. [2023-08-29 21:17:22,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 62 transitions, 533 flow [2023-08-29 21:17:22,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 62 transitions, 496 flow, removed 13 selfloop flow, removed 5 redundant places. [2023-08-29 21:17:22,226 INFO L231 Difference]: Finished difference. Result has 92 places, 52 transitions, 314 flow [2023-08-29 21:17:22,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=314, PETRI_PLACES=92, PETRI_TRANSITIONS=52} [2023-08-29 21:17:22,227 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 56 predicate places. [2023-08-29 21:17:22,227 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 52 transitions, 314 flow [2023-08-29 21:17:22,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 89.5) internal successors, (358), 4 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:22,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:17:22,228 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:17:22,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-29 21:17:22,228 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-08-29 21:17:22,229 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:17:22,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1358047202, now seen corresponding path program 1 times [2023-08-29 21:17:22,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:17:22,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872450581] [2023-08-29 21:17:22,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:17:22,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:17:22,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:17:22,664 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2023-08-29 21:17:22,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:17:22,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872450581] [2023-08-29 21:17:22,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872450581] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:17:22,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727010714] [2023-08-29 21:17:22,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:17:22,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:17:22,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:17:22,667 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) [2023-08-29 21:17:22,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-29 21:17:22,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:17:22,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 574 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-29 21:17:22,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:17:23,095 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-08-29 21:17:23,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:17:23,210 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-08-29 21:17:23,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727010714] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:17:23,211 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:17:23,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 3, 3] total 13 [2023-08-29 21:17:23,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2244510] [2023-08-29 21:17:23,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:17:23,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-29 21:17:23,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:17:23,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-29 21:17:23,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2023-08-29 21:17:24,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 197 [2023-08-29 21:17:24,014 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 52 transitions, 314 flow. Second operand has 15 states, 15 states have (on average 73.73333333333333) internal successors, (1106), 15 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:24,015 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:17:24,015 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 197 [2023-08-29 21:17:24,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:17:24,530 INFO L130 PetriNetUnfolder]: 989/2004 cut-off events. [2023-08-29 21:17:24,530 INFO L131 PetriNetUnfolder]: For 3924/3924 co-relation queries the response was YES. [2023-08-29 21:17:24,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7114 conditions, 2004 events. 989/2004 cut-off events. For 3924/3924 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 9156 event pairs, 1 based on Foata normal form. 10/2014 useless extension candidates. Maximal degree in co-relation 7078. Up to 1735 conditions per place. [2023-08-29 21:17:24,542 INFO L137 encePairwiseOnDemand]: 189/197 looper letters, 35 selfloop transitions, 5 changer transitions 50/90 dead transitions. [2023-08-29 21:17:24,543 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 90 transitions, 720 flow [2023-08-29 21:17:24,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-29 21:17:24,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-29 21:17:24,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 748 transitions. [2023-08-29 21:17:24,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37969543147208124 [2023-08-29 21:17:24,545 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 748 transitions. [2023-08-29 21:17:24,546 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 748 transitions. [2023-08-29 21:17:24,546 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:17:24,546 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 748 transitions. [2023-08-29 21:17:24,548 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 74.8) internal successors, (748), 10 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:24,550 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 197.0) internal successors, (2167), 11 states have internal predecessors, (2167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:24,550 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 197.0) internal successors, (2167), 11 states have internal predecessors, (2167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:24,551 INFO L175 Difference]: Start difference. First operand has 92 places, 52 transitions, 314 flow. Second operand 10 states and 748 transitions. [2023-08-29 21:17:24,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 90 transitions, 720 flow [2023-08-29 21:17:24,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 90 transitions, 682 flow, removed 3 selfloop flow, removed 7 redundant places. [2023-08-29 21:17:24,562 INFO L231 Difference]: Finished difference. Result has 93 places, 38 transitions, 232 flow [2023-08-29 21:17:24,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=290, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=232, PETRI_PLACES=93, PETRI_TRANSITIONS=38} [2023-08-29 21:17:24,562 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 57 predicate places. [2023-08-29 21:17:24,563 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 38 transitions, 232 flow [2023-08-29 21:17:24,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 73.73333333333333) internal successors, (1106), 15 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:24,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:17:24,563 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:17:24,576 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-29 21:17:24,768 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,SelfDestructingSolverStorable15 [2023-08-29 21:17:24,768 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-08-29 21:17:24,769 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:17:24,769 INFO L85 PathProgramCache]: Analyzing trace with hash 123714558, now seen corresponding path program 2 times [2023-08-29 21:17:24,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:17:24,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685989392] [2023-08-29 21:17:24,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:17:24,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:17:24,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:17:25,324 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2023-08-29 21:17:25,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:17:25,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685989392] [2023-08-29 21:17:25,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685989392] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:17:25,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435691112] [2023-08-29 21:17:25,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 21:17:25,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:17:25,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:17:25,329 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) [2023-08-29 21:17:25,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-29 21:17:25,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-29 21:17:25,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 21:17:25,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-29 21:17:25,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:17:25,676 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2023-08-29 21:17:25,676 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 21:17:25,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435691112] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:17:25,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-29 21:17:25,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 13 [2023-08-29 21:17:25,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704045818] [2023-08-29 21:17:25,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:17:25,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 21:17:25,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:17:25,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 21:17:25,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2023-08-29 21:17:25,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 197 [2023-08-29 21:17:25,818 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 38 transitions, 232 flow. Second operand has 5 states, 5 states have (on average 83.4) internal successors, (417), 5 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:25,818 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:17:25,818 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 197 [2023-08-29 21:17:25,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:17:25,877 INFO L130 PetriNetUnfolder]: 49/156 cut-off events. [2023-08-29 21:17:25,877 INFO L131 PetriNetUnfolder]: For 322/322 co-relation queries the response was YES. [2023-08-29 21:17:25,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 544 conditions, 156 events. 49/156 cut-off events. For 322/322 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 141 event pairs, 46 based on Foata normal form. 1/157 useless extension candidates. Maximal degree in co-relation 511. Up to 155 conditions per place. [2023-08-29 21:17:25,878 INFO L137 encePairwiseOnDemand]: 194/197 looper letters, 0 selfloop transitions, 0 changer transitions 37/37 dead transitions. [2023-08-29 21:17:25,878 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 37 transitions, 300 flow [2023-08-29 21:17:25,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 21:17:25,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 21:17:25,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 337 transitions. [2023-08-29 21:17:25,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4276649746192893 [2023-08-29 21:17:25,880 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 337 transitions. [2023-08-29 21:17:25,880 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 337 transitions. [2023-08-29 21:17:25,880 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:17:25,880 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 337 transitions. [2023-08-29 21:17:25,881 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 84.25) internal successors, (337), 4 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:25,882 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 197.0) internal successors, (985), 5 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:25,883 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 197.0) internal successors, (985), 5 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:25,883 INFO L175 Difference]: Start difference. First operand has 93 places, 38 transitions, 232 flow. Second operand 4 states and 337 transitions. [2023-08-29 21:17:25,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 37 transitions, 300 flow [2023-08-29 21:17:25,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 37 transitions, 277 flow, removed 1 selfloop flow, removed 11 redundant places. [2023-08-29 21:17:25,885 INFO L231 Difference]: Finished difference. Result has 73 places, 0 transitions, 0 flow [2023-08-29 21:17:25,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=73, PETRI_TRANSITIONS=0} [2023-08-29 21:17:25,886 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 37 predicate places. [2023-08-29 21:17:25,886 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 0 transitions, 0 flow [2023-08-29 21:17:25,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 83.4) internal successors, (417), 5 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:25,889 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 20 remaining) [2023-08-29 21:17:25,889 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 20 remaining) [2023-08-29 21:17:25,889 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 20 remaining) [2023-08-29 21:17:25,889 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 20 remaining) [2023-08-29 21:17:25,890 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 20 remaining) [2023-08-29 21:17:25,890 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 20 remaining) [2023-08-29 21:17:25,890 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 20 remaining) [2023-08-29 21:17:25,890 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 20 remaining) [2023-08-29 21:17:25,890 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 20 remaining) [2023-08-29 21:17:25,890 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 20 remaining) [2023-08-29 21:17:25,890 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK (9 of 20 remaining) [2023-08-29 21:17:25,891 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 20 remaining) [2023-08-29 21:17:25,891 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 20 remaining) [2023-08-29 21:17:25,891 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 20 remaining) [2023-08-29 21:17:25,891 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 20 remaining) [2023-08-29 21:17:25,891 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 20 remaining) [2023-08-29 21:17:25,891 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 20 remaining) [2023-08-29 21:17:25,892 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 20 remaining) [2023-08-29 21:17:25,892 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 20 remaining) [2023-08-29 21:17:25,892 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 20 remaining) [2023-08-29 21:17:25,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-29 21:17:26,097 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,SelfDestructingSolverStorable16 [2023-08-29 21:17:26,097 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-08-29 21:17:26,102 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-29 21:17:26,102 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-29 21:17:26,105 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.08 09:17:26 BasicIcfg [2023-08-29 21:17:26,105 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-29 21:17:26,106 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-08-29 21:17:26,106 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-08-29 21:17:26,106 INFO L275 PluginConnector]: Witness Printer initialized [2023-08-29 21:17:26,106 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 09:17:04" (3/4) ... [2023-08-29 21:17:26,108 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-08-29 21:17:26,112 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure t_fun [2023-08-29 21:17:26,115 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2023-08-29 21:17:26,115 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2023-08-29 21:17:26,115 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2023-08-29 21:17:26,139 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-08-29 21:17:26,140 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-08-29 21:17:26,140 INFO L158 Benchmark]: Toolchain (without parser) took 22467.86ms. Allocated memory was 67.1MB in the beginning and 383.8MB in the end (delta: 316.7MB). Free memory was 36.0MB in the beginning and 158.6MB in the end (delta: -122.6MB). Peak memory consumption was 192.7MB. Max. memory is 16.1GB. [2023-08-29 21:17:26,140 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 52.4MB. Free memory was 30.8MB in the beginning and 30.7MB in the end (delta: 54.5kB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-29 21:17:26,141 INFO L158 Benchmark]: CACSL2BoogieTranslator took 545.34ms. Allocated memory is still 67.1MB. Free memory was 35.8MB in the beginning and 37.5MB in the end (delta: -1.6MB). Peak memory consumption was 8.6MB. Max. memory is 16.1GB. [2023-08-29 21:17:26,141 INFO L158 Benchmark]: Boogie Procedure Inliner took 61.23ms. Allocated memory is still 67.1MB. Free memory was 37.5MB in the beginning and 34.9MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-29 21:17:26,141 INFO L158 Benchmark]: Boogie Preprocessor took 52.28ms. Allocated memory is still 67.1MB. Free memory was 34.9MB in the beginning and 33.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-29 21:17:26,142 INFO L158 Benchmark]: RCFGBuilder took 462.23ms. Allocated memory was 67.1MB in the beginning and 86.0MB in the end (delta: 18.9MB). Free memory was 33.4MB in the beginning and 51.7MB in the end (delta: -18.3MB). Peak memory consumption was 10.1MB. Max. memory is 16.1GB. [2023-08-29 21:17:26,142 INFO L158 Benchmark]: TraceAbstraction took 21305.17ms. Allocated memory was 86.0MB in the beginning and 383.8MB in the end (delta: 297.8MB). Free memory was 51.2MB in the beginning and 161.7MB in the end (delta: -110.5MB). Peak memory consumption was 186.6MB. Max. memory is 16.1GB. [2023-08-29 21:17:26,142 INFO L158 Benchmark]: Witness Printer took 34.10ms. Allocated memory is still 383.8MB. Free memory was 161.7MB in the beginning and 158.6MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-29 21:17:26,144 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 52.4MB. Free memory was 30.8MB in the beginning and 30.7MB in the end (delta: 54.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 545.34ms. Allocated memory is still 67.1MB. Free memory was 35.8MB in the beginning and 37.5MB in the end (delta: -1.6MB). Peak memory consumption was 8.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 61.23ms. Allocated memory is still 67.1MB. Free memory was 37.5MB in the beginning and 34.9MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 52.28ms. Allocated memory is still 67.1MB. Free memory was 34.9MB in the beginning and 33.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 462.23ms. Allocated memory was 67.1MB in the beginning and 86.0MB in the end (delta: 18.9MB). Free memory was 33.4MB in the beginning and 51.7MB in the end (delta: -18.3MB). Peak memory consumption was 10.1MB. Max. memory is 16.1GB. * TraceAbstraction took 21305.17ms. Allocated memory was 86.0MB in the beginning and 383.8MB in the end (delta: 297.8MB). Free memory was 51.2MB in the beginning and 161.7MB in the end (delta: -110.5MB). Peak memory consumption was 186.6MB. Max. memory is 16.1GB. * Witness Printer took 34.10ms. Allocated memory is still 383.8MB. Free memory was 161.7MB in the beginning and 158.6MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.1s, 95 PlacesBefore, 36 PlacesAfterwards, 97 TransitionsBefore, 35 TransitionsAfterwards, 2430 CoEnabledTransitionPairs, 4 FixpointIterations, 23 TrivialSequentialCompositions, 67 ConcurrentSequentialCompositions, 2 TrivialYvCompositions, 4 ConcurrentYvCompositions, 3 ChoiceCompositions, 99 TotalNumberOfCompositions, 3471 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2318, independent: 2215, independent conditional: 0, independent unconditional: 2215, dependent: 103, dependent conditional: 0, dependent unconditional: 103, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1317, independent: 1289, independent conditional: 0, independent unconditional: 1289, dependent: 28, dependent conditional: 0, dependent unconditional: 28, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 2318, independent: 926, independent conditional: 0, independent unconditional: 926, dependent: 75, dependent conditional: 0, dependent unconditional: 75, unknown: 1317, unknown conditional: 0, unknown unconditional: 1317] , Statistics on independence cache: Total cache size (in pairs): 64, Positive cache size: 51, Positive conditional cache size: 0, Positive unconditional cache size: 51, Negative cache size: 13, Negative conditional cache size: 0, Negative unconditional cache size: 13, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 931]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 120 locations, 20 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 21.1s, OverallIterations: 17, TraceHistogramMax: 10, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 7.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.2s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3619 SdHoareTripleChecker+Valid, 4.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2988 mSDsluCounter, 877 SdHoareTripleChecker+Invalid, 3.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 801 mSDsCounter, 175 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 7074 IncrementalHoareTripleChecker+Invalid, 7249 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 175 mSolverCounterUnsat, 76 mSDtfsCounter, 7074 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 532 GetRequests, 369 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 3.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=365occurred in iteration=14, InterpolantAutomatonStates: 104, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 7.8s InterpolantComputationTime, 687 NumberOfCodeBlocks, 633 NumberOfCodeBlocksAsserted, 29 NumberOfCheckSat, 804 ConstructedInterpolants, 22 QuantifiedInterpolants, 8198 SizeOfPredicates, 22 NumberOfNonLiveVariables, 2206 ConjunctsInSsa, 152 ConjunctsInUnsatCore, 33 InterpolantComputations, 11 PerfectInterpolantSequences, 2299/2615 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 15 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-29 21:17:26,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE