./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/goblint-regression/06-symbeq_23-idxsense_nr.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/goblint-regression/06-symbeq_23-idxsense_nr.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 9205365dcda04af07212d180b1c6367c5de79b6e0d2e09ec11b949fed58626f5 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 03:44:28,205 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 03:44:28,207 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 03:44:28,252 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 03:44:28,255 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 03:44:28,258 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 03:44:28,260 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 03:44:28,262 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 03:44:28,264 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 03:44:28,266 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 03:44:28,267 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 03:44:28,270 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 03:44:28,270 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 03:44:28,276 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 03:44:28,277 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 03:44:28,278 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 03:44:28,279 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 03:44:28,280 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 03:44:28,282 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 03:44:28,288 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 03:44:28,290 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 03:44:28,291 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 03:44:28,293 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 03:44:28,293 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 03:44:28,296 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 03:44:28,298 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 03:44:28,298 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 03:44:28,299 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 03:44:28,300 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 03:44:28,301 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 03:44:28,301 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 03:44:28,302 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 03:44:28,303 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 03:44:28,304 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 03:44:28,306 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 03:44:28,306 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 03:44:28,306 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 03:44:28,307 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 03:44:28,307 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 03:44:28,308 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 03:44:28,308 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 03:44:28,310 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 03:44:28,348 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 03:44:28,349 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 03:44:28,350 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 03:44:28,350 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 03:44:28,351 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 03:44:28,351 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 03:44:28,352 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 03:44:28,352 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 03:44:28,352 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 03:44:28,352 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 03:44:28,353 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 03:44:28,353 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 03:44:28,353 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 03:44:28,353 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 03:44:28,354 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 03:44:28,354 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 03:44:28,354 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 03:44:28,354 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 03:44:28,354 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 03:44:28,354 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 03:44:28,355 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 03:44:28,355 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 03:44:28,355 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 03:44:28,355 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 03:44:28,355 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 03:44:28,356 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 03:44:28,356 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 03:44:28,356 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 03:44:28,356 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 03:44:28,356 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 03:44:28,357 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 03:44:28,357 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 03:44:28,357 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 03:44:28,357 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 03:44:28,357 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9205365dcda04af07212d180b1c6367c5de79b6e0d2e09ec11b949fed58626f5 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 03:44:28,670 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 03:44:28,700 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 03:44:28,703 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 03:44:28,704 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 03:44:28,704 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 03:44:28,705 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/06-symbeq_23-idxsense_nr.i [2023-08-30 03:44:29,784 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 03:44:30,061 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 03:44:30,062 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/06-symbeq_23-idxsense_nr.i [2023-08-30 03:44:30,072 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc256788a/420e28b0cb7f4215baa83ea2d41863e2/FLAG46a0332f0 [2023-08-30 03:44:30,086 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc256788a/420e28b0cb7f4215baa83ea2d41863e2 [2023-08-30 03:44:30,089 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 03:44:30,091 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 03:44:30,092 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 03:44:30,092 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 03:44:30,099 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 03:44:30,099 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 03:44:30" (1/1) ... [2023-08-30 03:44:30,100 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6156ef08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:44:30, skipping insertion in model container [2023-08-30 03:44:30,100 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 03:44:30" (1/1) ... [2023-08-30 03:44:30,106 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 03:44:30,149 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 03:44:30,490 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 03:44:30,513 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 03:44:30,571 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 03:44:30,607 INFO L208 MainTranslator]: Completed translation [2023-08-30 03:44:30,607 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:44:30 WrapperNode [2023-08-30 03:44:30,608 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 03:44:30,609 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 03:44:30,609 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 03:44:30,609 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 03:44:30,615 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:44:30" (1/1) ... [2023-08-30 03:44:30,639 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:44:30" (1/1) ... [2023-08-30 03:44:30,662 INFO L138 Inliner]: procedures = 161, calls = 18, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 49 [2023-08-30 03:44:30,662 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 03:44:30,663 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 03:44:30,663 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 03:44:30,664 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 03:44:30,671 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:44:30" (1/1) ... [2023-08-30 03:44:30,671 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:44:30" (1/1) ... [2023-08-30 03:44:30,679 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:44:30" (1/1) ... [2023-08-30 03:44:30,680 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:44:30" (1/1) ... [2023-08-30 03:44:30,687 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:44:30" (1/1) ... [2023-08-30 03:44:30,689 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:44:30" (1/1) ... [2023-08-30 03:44:30,690 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:44:30" (1/1) ... [2023-08-30 03:44:30,694 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:44:30" (1/1) ... [2023-08-30 03:44:30,696 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 03:44:30,700 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 03:44:30,700 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 03:44:30,700 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 03:44:30,701 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:44:30" (1/1) ... [2023-08-30 03:44:30,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 03:44:30,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 03:44:30,734 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 03:44:30,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 03:44:30,768 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 03:44:30,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 03:44:30,769 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-30 03:44:30,769 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 03:44:30,769 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 03:44:30,769 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-30 03:44:30,769 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-30 03:44:30,769 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 03:44:30,770 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 03:44:30,770 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 03:44:30,771 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 03:44:30,928 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 03:44:30,929 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 03:44:31,153 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 03:44:31,158 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 03:44:31,160 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-08-30 03:44:31,162 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 03:44:31 BoogieIcfgContainer [2023-08-30 03:44:31,162 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 03:44:31,165 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 03:44:31,165 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 03:44:31,168 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 03:44:31,169 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 03:44:30" (1/3) ... [2023-08-30 03:44:31,169 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f8ae89b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 03:44:31, skipping insertion in model container [2023-08-30 03:44:31,169 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:44:30" (2/3) ... [2023-08-30 03:44:31,170 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f8ae89b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 03:44:31, skipping insertion in model container [2023-08-30 03:44:31,170 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 03:44:31" (3/3) ... [2023-08-30 03:44:31,171 INFO L112 eAbstractionObserver]: Analyzing ICFG 06-symbeq_23-idxsense_nr.i [2023-08-30 03:44:31,186 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 03:44:31,187 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2023-08-30 03:44:31,187 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 03:44:31,254 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 03:44:31,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 79 places, 77 transitions, 159 flow [2023-08-30 03:44:31,331 INFO L130 PetriNetUnfolder]: 2/76 cut-off events. [2023-08-30 03:44:31,332 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 03:44:31,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80 conditions, 76 events. 2/76 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 89 event pairs, 0 based on Foata normal form. 0/59 useless extension candidates. Maximal degree in co-relation 26. Up to 2 conditions per place. [2023-08-30 03:44:31,335 INFO L82 GeneralOperation]: Start removeDead. Operand has 79 places, 77 transitions, 159 flow [2023-08-30 03:44:31,338 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 78 places, 76 transitions, 155 flow [2023-08-30 03:44:31,341 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 03:44:31,350 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 78 places, 76 transitions, 155 flow [2023-08-30 03:44:31,352 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 78 places, 76 transitions, 155 flow [2023-08-30 03:44:31,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 78 places, 76 transitions, 155 flow [2023-08-30 03:44:31,376 INFO L130 PetriNetUnfolder]: 2/76 cut-off events. [2023-08-30 03:44:31,378 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 03:44:31,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80 conditions, 76 events. 2/76 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 89 event pairs, 0 based on Foata normal form. 0/59 useless extension candidates. Maximal degree in co-relation 26. Up to 2 conditions per place. [2023-08-30 03:44:31,380 INFO L119 LiptonReduction]: Number of co-enabled transitions 1020 [2023-08-30 03:44:33,204 INFO L134 LiptonReduction]: Checked pairs total: 2944 [2023-08-30 03:44:33,204 INFO L136 LiptonReduction]: Total number of compositions: 81 [2023-08-30 03:44:33,218 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 03:44:33,224 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;@62988250, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 03:44:33,225 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2023-08-30 03:44:33,231 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 03:44:33,231 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 03:44:33,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 03:44:33,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 03:44:33,233 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-08-30 03:44:33,238 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 03:44:33,238 INFO L85 PathProgramCache]: Analyzing trace with hash 9273, now seen corresponding path program 1 times [2023-08-30 03:44:33,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 03:44:33,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951531322] [2023-08-30 03:44:33,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:44:33,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 03:44:33,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:44:33,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 03:44:33,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 03:44:33,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951531322] [2023-08-30 03:44:33,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951531322] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 03:44:33,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 03:44:33,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 03:44:33,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128037600] [2023-08-30 03:44:33,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 03:44:33,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-30 03:44:33,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 03:44:33,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-30 03:44:33,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-30 03:44:33,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 158 [2023-08-30 03:44:33,436 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 32 transitions, 67 flow. Second operand has 2 states, 2 states have (on average 76.0) internal successors, (152), 2 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:33,436 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 03:44:33,436 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 158 [2023-08-30 03:44:33,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 03:44:33,530 INFO L130 PetriNetUnfolder]: 85/202 cut-off events. [2023-08-30 03:44:33,531 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 03:44:33,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 398 conditions, 202 events. 85/202 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 749 event pairs, 84 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 385. Up to 192 conditions per place. [2023-08-30 03:44:33,534 INFO L137 encePairwiseOnDemand]: 151/158 looper letters, 23 selfloop transitions, 0 changer transitions 0/25 dead transitions. [2023-08-30 03:44:33,534 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 25 transitions, 99 flow [2023-08-30 03:44:33,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-30 03:44:33,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-30 03:44:33,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 180 transitions. [2023-08-30 03:44:33,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.569620253164557 [2023-08-30 03:44:33,546 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 180 transitions. [2023-08-30 03:44:33,546 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 180 transitions. [2023-08-30 03:44:33,547 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 03:44:33,549 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 180 transitions. [2023-08-30 03:44:33,551 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 90.0) internal successors, (180), 2 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:33,555 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:33,555 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:33,557 INFO L175 Difference]: Start difference. First operand has 35 places, 32 transitions, 67 flow. Second operand 2 states and 180 transitions. [2023-08-30 03:44:33,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 25 transitions, 99 flow [2023-08-30 03:44:33,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 25 transitions, 98 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 03:44:33,560 INFO L231 Difference]: Finished difference. Result has 28 places, 25 transitions, 52 flow [2023-08-30 03:44:33,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=52, PETRI_PLACES=28, PETRI_TRANSITIONS=25} [2023-08-30 03:44:33,565 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, -7 predicate places. [2023-08-30 03:44:33,565 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 25 transitions, 52 flow [2023-08-30 03:44:33,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 76.0) internal successors, (152), 2 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:33,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 03:44:33,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 03:44:33,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 03:44:33,566 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-08-30 03:44:33,567 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 03:44:33,567 INFO L85 PathProgramCache]: Analyzing trace with hash 8919061, now seen corresponding path program 1 times [2023-08-30 03:44:33,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 03:44:33,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194327808] [2023-08-30 03:44:33,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:44:33,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 03:44:33,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:44:33,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 03:44:33,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 03:44:33,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194327808] [2023-08-30 03:44:33,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194327808] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 03:44:33,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 03:44:33,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 03:44:33,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614857707] [2023-08-30 03:44:33,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 03:44:33,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 03:44:33,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 03:44:33,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 03:44:33,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 03:44:33,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 158 [2023-08-30 03:44:33,654 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 25 transitions, 52 flow. Second operand has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:33,654 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 03:44:33,655 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 158 [2023-08-30 03:44:33,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 03:44:33,730 INFO L130 PetriNetUnfolder]: 85/203 cut-off events. [2023-08-30 03:44:33,731 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 03:44:33,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 400 conditions, 203 events. 85/203 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 752 event pairs, 84 based on Foata normal form. 0/129 useless extension candidates. Maximal degree in co-relation 397. Up to 192 conditions per place. [2023-08-30 03:44:33,733 INFO L137 encePairwiseOnDemand]: 155/158 looper letters, 22 selfloop transitions, 2 changer transitions 0/26 dead transitions. [2023-08-30 03:44:33,733 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 26 transitions, 102 flow [2023-08-30 03:44:33,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 03:44:33,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 03:44:33,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 238 transitions. [2023-08-30 03:44:33,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5021097046413502 [2023-08-30 03:44:33,739 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 238 transitions. [2023-08-30 03:44:33,739 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 238 transitions. [2023-08-30 03:44:33,741 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 03:44:33,741 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 238 transitions. [2023-08-30 03:44:33,742 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 79.33333333333333) internal successors, (238), 3 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:33,745 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 158.0) internal successors, (632), 4 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:33,745 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 158.0) internal successors, (632), 4 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:33,745 INFO L175 Difference]: Start difference. First operand has 28 places, 25 transitions, 52 flow. Second operand 3 states and 238 transitions. [2023-08-30 03:44:33,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 26 transitions, 102 flow [2023-08-30 03:44:33,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 26 transitions, 102 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 03:44:33,747 INFO L231 Difference]: Finished difference. Result has 31 places, 26 transitions, 64 flow [2023-08-30 03:44:33,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=64, PETRI_PLACES=31, PETRI_TRANSITIONS=26} [2023-08-30 03:44:33,748 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, -4 predicate places. [2023-08-30 03:44:33,748 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 26 transitions, 64 flow [2023-08-30 03:44:33,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:33,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 03:44:33,748 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 03:44:33,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 03:44:33,749 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-08-30 03:44:33,750 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 03:44:33,751 INFO L85 PathProgramCache]: Analyzing trace with hash 276591196, now seen corresponding path program 1 times [2023-08-30 03:44:33,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 03:44:33,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906392579] [2023-08-30 03:44:33,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:44:33,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 03:44:33,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:44:33,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 03:44:33,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 03:44:33,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906392579] [2023-08-30 03:44:33,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906392579] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 03:44:33,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154318934] [2023-08-30 03:44:33,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:44:33,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 03:44:33,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 03:44:33,889 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 03:44:33,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 03:44:33,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:44:33,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 03:44:33,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 03:44:34,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 03:44:34,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 03:44:34,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 03:44:34,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154318934] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 03:44:34,041 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 03:44:34,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 03:44:34,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167427736] [2023-08-30 03:44:34,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 03:44:34,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 03:44:34,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 03:44:34,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 03:44:34,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 03:44:34,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 158 [2023-08-30 03:44:34,074 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 26 transitions, 64 flow. Second operand has 7 states, 7 states have (on average 71.42857142857143) internal successors, (500), 7 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:34,074 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 03:44:34,074 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 158 [2023-08-30 03:44:34,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 03:44:34,181 INFO L130 PetriNetUnfolder]: 85/206 cut-off events. [2023-08-30 03:44:34,188 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 03:44:34,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 416 conditions, 206 events. 85/206 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 752 event pairs, 84 based on Foata normal form. 0/132 useless extension candidates. Maximal degree in co-relation 411. Up to 192 conditions per place. [2023-08-30 03:44:34,190 INFO L137 encePairwiseOnDemand]: 155/158 looper letters, 22 selfloop transitions, 5 changer transitions 0/29 dead transitions. [2023-08-30 03:44:34,190 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 29 transitions, 130 flow [2023-08-30 03:44:34,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 03:44:34,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 03:44:34,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 450 transitions. [2023-08-30 03:44:34,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47468354430379744 [2023-08-30 03:44:34,192 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 450 transitions. [2023-08-30 03:44:34,192 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 450 transitions. [2023-08-30 03:44:34,192 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 03:44:34,192 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 450 transitions. [2023-08-30 03:44:34,193 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 75.0) internal successors, (450), 6 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:34,195 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 158.0) internal successors, (1106), 7 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) [2023-08-30 03:44:34,195 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 158.0) internal successors, (1106), 7 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) [2023-08-30 03:44:34,196 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 64 flow. Second operand 6 states and 450 transitions. [2023-08-30 03:44:34,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 29 transitions, 130 flow [2023-08-30 03:44:34,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 29 transitions, 126 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 03:44:34,197 INFO L231 Difference]: Finished difference. Result has 38 places, 29 transitions, 96 flow [2023-08-30 03:44:34,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=96, PETRI_PLACES=38, PETRI_TRANSITIONS=29} [2023-08-30 03:44:34,198 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 3 predicate places. [2023-08-30 03:44:34,198 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 29 transitions, 96 flow [2023-08-30 03:44:34,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 71.42857142857143) internal successors, (500), 7 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:34,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 03:44:34,198 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2023-08-30 03:44:34,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 03:44:34,399 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 [2023-08-30 03:44:34,399 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-08-30 03:44:34,400 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 03:44:34,400 INFO L85 PathProgramCache]: Analyzing trace with hash -2014318123, now seen corresponding path program 2 times [2023-08-30 03:44:34,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 03:44:34,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321510946] [2023-08-30 03:44:34,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:44:34,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 03:44:34,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:44:34,537 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 03:44:34,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 03:44:34,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321510946] [2023-08-30 03:44:34,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321510946] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 03:44:34,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704348809] [2023-08-30 03:44:34,539 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 03:44:34,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 03:44:34,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 03:44:34,540 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 03:44:34,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 03:44:34,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 03:44:34,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 03:44:34,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 03:44:34,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 03:44:34,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 03:44:34,703 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 [2023-08-30 03:44:34,727 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 03:44:34,727 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 03:44:34,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704348809] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 03:44:34,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 03:44:34,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 8 [2023-08-30 03:44:34,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298077128] [2023-08-30 03:44:34,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 03:44:34,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 03:44:34,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 03:44:34,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 03:44:34,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-08-30 03:44:34,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 158 [2023-08-30 03:44:34,792 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 29 transitions, 96 flow. Second operand has 4 states, 4 states have (on average 68.25) internal successors, (273), 4 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) [2023-08-30 03:44:34,792 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 03:44:34,792 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 158 [2023-08-30 03:44:34,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 03:44:34,848 INFO L130 PetriNetUnfolder]: 61/153 cut-off events. [2023-08-30 03:44:34,848 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 03:44:34,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 325 conditions, 153 events. 61/153 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 485 event pairs, 60 based on Foata normal form. 0/115 useless extension candidates. Maximal degree in co-relation 317. Up to 144 conditions per place. [2023-08-30 03:44:34,851 INFO L137 encePairwiseOnDemand]: 154/158 looper letters, 23 selfloop transitions, 1 changer transitions 0/26 dead transitions. [2023-08-30 03:44:34,851 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 26 transitions, 138 flow [2023-08-30 03:44:34,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 03:44:34,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 03:44:34,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 224 transitions. [2023-08-30 03:44:34,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47257383966244726 [2023-08-30 03:44:34,866 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 224 transitions. [2023-08-30 03:44:34,866 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 224 transitions. [2023-08-30 03:44:34,866 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 03:44:34,866 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 224 transitions. [2023-08-30 03:44:34,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:34,868 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 158.0) internal successors, (632), 4 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:34,868 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 158.0) internal successors, (632), 4 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:34,868 INFO L175 Difference]: Start difference. First operand has 38 places, 29 transitions, 96 flow. Second operand 3 states and 224 transitions. [2023-08-30 03:44:34,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 26 transitions, 138 flow [2023-08-30 03:44:34,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 26 transitions, 124 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-30 03:44:34,870 INFO L231 Difference]: Finished difference. Result has 36 places, 26 transitions, 78 flow [2023-08-30 03:44:34,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=36, PETRI_TRANSITIONS=26} [2023-08-30 03:44:34,871 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 1 predicate places. [2023-08-30 03:44:34,871 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 26 transitions, 78 flow [2023-08-30 03:44:34,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 68.25) internal successors, (273), 4 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) [2023-08-30 03:44:34,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 03:44:34,871 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2023-08-30 03:44:34,884 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 03:44:35,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-08-30 03:44:35,079 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-08-30 03:44:35,080 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 03:44:35,080 INFO L85 PathProgramCache]: Analyzing trace with hash -2014318112, now seen corresponding path program 1 times [2023-08-30 03:44:35,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 03:44:35,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610466839] [2023-08-30 03:44:35,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:44:35,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 03:44:35,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:44:35,181 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 03:44:35,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 03:44:35,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610466839] [2023-08-30 03:44:35,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610466839] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 03:44:35,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915245021] [2023-08-30 03:44:35,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:44:35,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 03:44:35,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 03:44:35,183 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 03:44:35,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 03:44:35,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:44:35,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 03:44:35,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 03:44:35,262 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 03:44:35,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 03:44:35,310 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 03:44:35,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915245021] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 03:44:35,311 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 03:44:35,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-30 03:44:35,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286380776] [2023-08-30 03:44:35,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 03:44:35,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 03:44:35,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 03:44:35,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 03:44:35,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-30 03:44:35,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 158 [2023-08-30 03:44:35,346 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 26 transitions, 78 flow. Second operand has 13 states, 13 states have (on average 71.23076923076923) internal successors, (926), 13 states have internal predecessors, (926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:35,346 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 03:44:35,346 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 158 [2023-08-30 03:44:35,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 03:44:35,410 INFO L130 PetriNetUnfolder]: 61/159 cut-off events. [2023-08-30 03:44:35,410 INFO L131 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2023-08-30 03:44:35,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 344 conditions, 159 events. 61/159 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 485 event pairs, 60 based on Foata normal form. 6/127 useless extension candidates. Maximal degree in co-relation 335. Up to 141 conditions per place. [2023-08-30 03:44:35,414 INFO L137 encePairwiseOnDemand]: 155/158 looper letters, 19 selfloop transitions, 11 changer transitions 0/32 dead transitions. [2023-08-30 03:44:35,416 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 32 transitions, 174 flow [2023-08-30 03:44:35,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 03:44:35,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 03:44:35,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 876 transitions. [2023-08-30 03:44:35,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4620253164556962 [2023-08-30 03:44:35,419 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 876 transitions. [2023-08-30 03:44:35,420 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 876 transitions. [2023-08-30 03:44:35,420 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 03:44:35,420 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 876 transitions. [2023-08-30 03:44:35,422 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 73.0) internal successors, (876), 12 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:35,426 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 158.0) internal successors, (2054), 13 states have internal predecessors, (2054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:35,426 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 158.0) internal successors, (2054), 13 states have internal predecessors, (2054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:35,426 INFO L175 Difference]: Start difference. First operand has 36 places, 26 transitions, 78 flow. Second operand 12 states and 876 transitions. [2023-08-30 03:44:35,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 32 transitions, 174 flow [2023-08-30 03:44:35,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 32 transitions, 173 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 03:44:35,430 INFO L231 Difference]: Finished difference. Result has 52 places, 32 transitions, 161 flow [2023-08-30 03:44:35,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=77, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=161, PETRI_PLACES=52, PETRI_TRANSITIONS=32} [2023-08-30 03:44:35,433 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 17 predicate places. [2023-08-30 03:44:35,433 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 32 transitions, 161 flow [2023-08-30 03:44:35,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 71.23076923076923) internal successors, (926), 13 states have internal predecessors, (926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:35,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 03:44:35,434 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1] [2023-08-30 03:44:35,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 03:44:35,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 03:44:35,648 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-08-30 03:44:35,648 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 03:44:35,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1056527488, now seen corresponding path program 2 times [2023-08-30 03:44:35,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 03:44:35,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88253876] [2023-08-30 03:44:35,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:44:35,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 03:44:35,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:44:35,751 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 03:44:35,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 03:44:35,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88253876] [2023-08-30 03:44:35,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88253876] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 03:44:35,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 03:44:35,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 03:44:35,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462468306] [2023-08-30 03:44:35,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 03:44:35,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 03:44:35,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 03:44:35,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 03:44:35,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 03:44:35,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 158 [2023-08-30 03:44:35,815 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 32 transitions, 161 flow. Second operand has 4 states, 4 states have (on average 62.25) internal successors, (249), 4 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:35,816 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 03:44:35,816 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 158 [2023-08-30 03:44:35,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 03:44:35,865 INFO L130 PetriNetUnfolder]: 35/112 cut-off events. [2023-08-30 03:44:35,866 INFO L131 PetriNetUnfolder]: For 31/31 co-relation queries the response was YES. [2023-08-30 03:44:35,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 284 conditions, 112 events. 35/112 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 281 event pairs, 28 based on Foata normal form. 5/108 useless extension candidates. Maximal degree in co-relation 269. Up to 81 conditions per place. [2023-08-30 03:44:35,866 INFO L137 encePairwiseOnDemand]: 149/158 looper letters, 30 selfloop transitions, 5 changer transitions 0/36 dead transitions. [2023-08-30 03:44:35,867 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 36 transitions, 239 flow [2023-08-30 03:44:35,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 03:44:35,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 03:44:35,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 274 transitions. [2023-08-30 03:44:35,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43354430379746833 [2023-08-30 03:44:35,868 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 274 transitions. [2023-08-30 03:44:35,868 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 274 transitions. [2023-08-30 03:44:35,869 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 03:44:35,869 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 274 transitions. [2023-08-30 03:44:35,869 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 68.5) internal successors, (274), 4 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:35,870 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 158.0) internal successors, (790), 5 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:35,871 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 158.0) internal successors, (790), 5 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:35,871 INFO L175 Difference]: Start difference. First operand has 52 places, 32 transitions, 161 flow. Second operand 4 states and 274 transitions. [2023-08-30 03:44:35,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 36 transitions, 239 flow [2023-08-30 03:44:35,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 36 transitions, 191 flow, removed 19 selfloop flow, removed 5 redundant places. [2023-08-30 03:44:35,874 INFO L231 Difference]: Finished difference. Result has 51 places, 32 transitions, 143 flow [2023-08-30 03:44:35,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=143, PETRI_PLACES=51, PETRI_TRANSITIONS=32} [2023-08-30 03:44:35,875 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 16 predicate places. [2023-08-30 03:44:35,875 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 32 transitions, 143 flow [2023-08-30 03:44:35,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 62.25) internal successors, (249), 4 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:35,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 03:44:35,876 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 03:44:35,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 03:44:35,876 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-08-30 03:44:35,877 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 03:44:35,877 INFO L85 PathProgramCache]: Analyzing trace with hash -2139239541, now seen corresponding path program 1 times [2023-08-30 03:44:35,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 03:44:35,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200021993] [2023-08-30 03:44:35,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:44:35,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 03:44:35,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:44:35,998 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 03:44:35,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 03:44:35,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200021993] [2023-08-30 03:44:35,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200021993] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 03:44:35,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 03:44:35,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 03:44:35,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131227032] [2023-08-30 03:44:35,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 03:44:35,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 03:44:36,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 03:44:36,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 03:44:36,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 03:44:36,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 158 [2023-08-30 03:44:36,065 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 32 transitions, 143 flow. Second operand has 4 states, 4 states have (on average 69.75) internal successors, (279), 4 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:36,065 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 03:44:36,065 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 158 [2023-08-30 03:44:36,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 03:44:36,111 INFO L130 PetriNetUnfolder]: 28/92 cut-off events. [2023-08-30 03:44:36,111 INFO L131 PetriNetUnfolder]: For 64/64 co-relation queries the response was YES. [2023-08-30 03:44:36,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 254 conditions, 92 events. 28/92 cut-off events. For 64/64 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 199 event pairs, 24 based on Foata normal form. 0/91 useless extension candidates. Maximal degree in co-relation 237. Up to 60 conditions per place. [2023-08-30 03:44:36,112 INFO L137 encePairwiseOnDemand]: 154/158 looper letters, 23 selfloop transitions, 3 changer transitions 6/34 dead transitions. [2023-08-30 03:44:36,112 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 34 transitions, 209 flow [2023-08-30 03:44:36,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 03:44:36,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 03:44:36,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 290 transitions. [2023-08-30 03:44:36,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4588607594936709 [2023-08-30 03:44:36,114 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 290 transitions. [2023-08-30 03:44:36,114 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 290 transitions. [2023-08-30 03:44:36,114 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 03:44:36,115 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 290 transitions. [2023-08-30 03:44:36,115 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 72.5) internal successors, (290), 4 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:36,116 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 158.0) internal successors, (790), 5 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:36,117 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 158.0) internal successors, (790), 5 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:36,117 INFO L175 Difference]: Start difference. First operand has 51 places, 32 transitions, 143 flow. Second operand 4 states and 290 transitions. [2023-08-30 03:44:36,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 34 transitions, 209 flow [2023-08-30 03:44:36,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 34 transitions, 207 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 03:44:36,119 INFO L231 Difference]: Finished difference. Result has 52 places, 27 transitions, 123 flow [2023-08-30 03:44:36,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=123, PETRI_PLACES=52, PETRI_TRANSITIONS=27} [2023-08-30 03:44:36,120 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 17 predicate places. [2023-08-30 03:44:36,120 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 27 transitions, 123 flow [2023-08-30 03:44:36,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 69.75) internal successors, (279), 4 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:36,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 03:44:36,121 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 03:44:36,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 03:44:36,121 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-08-30 03:44:36,121 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 03:44:36,121 INFO L85 PathProgramCache]: Analyzing trace with hash -867387445, now seen corresponding path program 1 times [2023-08-30 03:44:36,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 03:44:36,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056308566] [2023-08-30 03:44:36,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:44:36,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 03:44:36,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:44:36,233 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 03:44:36,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 03:44:36,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056308566] [2023-08-30 03:44:36,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056308566] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 03:44:36,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 03:44:36,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 03:44:36,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268102127] [2023-08-30 03:44:36,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 03:44:36,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 03:44:36,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 03:44:36,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 03:44:36,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 03:44:36,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 158 [2023-08-30 03:44:36,309 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 27 transitions, 123 flow. Second operand has 5 states, 5 states have (on average 58.8) internal successors, (294), 5 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:36,309 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 03:44:36,309 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 158 [2023-08-30 03:44:36,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 03:44:36,349 INFO L130 PetriNetUnfolder]: 16/58 cut-off events. [2023-08-30 03:44:36,349 INFO L131 PetriNetUnfolder]: For 67/67 co-relation queries the response was YES. [2023-08-30 03:44:36,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177 conditions, 58 events. 16/58 cut-off events. For 67/67 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 70 event pairs, 15 based on Foata normal form. 2/60 useless extension candidates. Maximal degree in co-relation 159. Up to 43 conditions per place. [2023-08-30 03:44:36,350 INFO L137 encePairwiseOnDemand]: 154/158 looper letters, 0 selfloop transitions, 0 changer transitions 25/25 dead transitions. [2023-08-30 03:44:36,350 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 25 transitions, 161 flow [2023-08-30 03:44:36,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 03:44:36,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 03:44:36,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 240 transitions. [2023-08-30 03:44:36,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.379746835443038 [2023-08-30 03:44:36,352 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 240 transitions. [2023-08-30 03:44:36,352 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 240 transitions. [2023-08-30 03:44:36,352 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 03:44:36,352 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 240 transitions. [2023-08-30 03:44:36,353 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 60.0) internal successors, (240), 4 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:36,354 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 158.0) internal successors, (790), 5 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:36,354 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 158.0) internal successors, (790), 5 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:36,354 INFO L175 Difference]: Start difference. First operand has 52 places, 27 transitions, 123 flow. Second operand 4 states and 240 transitions. [2023-08-30 03:44:36,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 25 transitions, 161 flow [2023-08-30 03:44:36,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 25 transitions, 151 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-30 03:44:36,356 INFO L231 Difference]: Finished difference. Result has 45 places, 0 transitions, 0 flow [2023-08-30 03:44:36,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=45, PETRI_TRANSITIONS=0} [2023-08-30 03:44:36,357 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 10 predicate places. [2023-08-30 03:44:36,357 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 0 transitions, 0 flow [2023-08-30 03:44:36,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 58.8) internal successors, (294), 5 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:36,359 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 20 remaining) [2023-08-30 03:44:36,360 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 20 remaining) [2023-08-30 03:44:36,360 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 20 remaining) [2023-08-30 03:44:36,360 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 20 remaining) [2023-08-30 03:44:36,361 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 20 remaining) [2023-08-30 03:44:36,361 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 20 remaining) [2023-08-30 03:44:36,361 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 20 remaining) [2023-08-30 03:44:36,361 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 20 remaining) [2023-08-30 03:44:36,361 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 20 remaining) [2023-08-30 03:44:36,361 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 20 remaining) [2023-08-30 03:44:36,362 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK (9 of 20 remaining) [2023-08-30 03:44:36,362 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 20 remaining) [2023-08-30 03:44:36,362 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 20 remaining) [2023-08-30 03:44:36,362 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 20 remaining) [2023-08-30 03:44:36,362 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 20 remaining) [2023-08-30 03:44:36,362 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 20 remaining) [2023-08-30 03:44:36,363 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 20 remaining) [2023-08-30 03:44:36,363 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 20 remaining) [2023-08-30 03:44:36,363 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 20 remaining) [2023-08-30 03:44:36,363 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 20 remaining) [2023-08-30 03:44:36,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 03:44:36,364 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1] [2023-08-30 03:44:36,368 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-30 03:44:36,368 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-30 03:44:36,371 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.08 03:44:36 BasicIcfg [2023-08-30 03:44:36,371 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-30 03:44:36,371 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-08-30 03:44:36,371 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-08-30 03:44:36,372 INFO L275 PluginConnector]: Witness Printer initialized [2023-08-30 03:44:36,372 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 03:44:31" (3/4) ... [2023-08-30 03:44:36,374 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-08-30 03:44:36,379 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure t_fun [2023-08-30 03:44:36,382 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2023-08-30 03:44:36,382 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2023-08-30 03:44:36,383 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2023-08-30 03:44:36,407 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-08-30 03:44:36,407 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-08-30 03:44:36,408 INFO L158 Benchmark]: Toolchain (without parser) took 6317.08ms. Allocated memory was 67.1MB in the beginning and 119.5MB in the end (delta: 52.4MB). Free memory was 43.0MB in the beginning and 65.8MB in the end (delta: -22.7MB). Peak memory consumption was 31.5MB. Max. memory is 16.1GB. [2023-08-30 03:44:36,408 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 54.5MB. Free memory was 33.0MB in the beginning and 32.9MB in the end (delta: 45.4kB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 03:44:36,408 INFO L158 Benchmark]: CACSL2BoogieTranslator took 516.76ms. Allocated memory is still 67.1MB. Free memory was 42.8MB in the beginning and 40.8MB in the end (delta: 2.1MB). Peak memory consumption was 18.8MB. Max. memory is 16.1GB. [2023-08-30 03:44:36,409 INFO L158 Benchmark]: Boogie Procedure Inliner took 53.18ms. Allocated memory is still 67.1MB. Free memory was 40.8MB in the beginning and 38.8MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-30 03:44:36,409 INFO L158 Benchmark]: Boogie Preprocessor took 35.76ms. Allocated memory is still 67.1MB. Free memory was 38.8MB in the beginning and 37.2MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 03:44:36,409 INFO L158 Benchmark]: RCFGBuilder took 462.73ms. Allocated memory was 67.1MB in the beginning and 81.8MB in the end (delta: 14.7MB). Free memory was 37.2MB in the beginning and 55.2MB in the end (delta: -18.0MB). Peak memory consumption was 15.6MB. Max. memory is 16.1GB. [2023-08-30 03:44:36,409 INFO L158 Benchmark]: TraceAbstraction took 5205.70ms. Allocated memory was 81.8MB in the beginning and 119.5MB in the end (delta: 37.7MB). Free memory was 54.8MB in the beginning and 68.9MB in the end (delta: -14.1MB). Peak memory consumption was 24.2MB. Max. memory is 16.1GB. [2023-08-30 03:44:36,410 INFO L158 Benchmark]: Witness Printer took 36.08ms. Allocated memory is still 119.5MB. Free memory was 68.9MB in the beginning and 65.8MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-30 03:44:36,411 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 54.5MB. Free memory was 33.0MB in the beginning and 32.9MB in the end (delta: 45.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 516.76ms. Allocated memory is still 67.1MB. Free memory was 42.8MB in the beginning and 40.8MB in the end (delta: 2.1MB). Peak memory consumption was 18.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 53.18ms. Allocated memory is still 67.1MB. Free memory was 40.8MB in the beginning and 38.8MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 35.76ms. Allocated memory is still 67.1MB. Free memory was 38.8MB in the beginning and 37.2MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 462.73ms. Allocated memory was 67.1MB in the beginning and 81.8MB in the end (delta: 14.7MB). Free memory was 37.2MB in the beginning and 55.2MB in the end (delta: -18.0MB). Peak memory consumption was 15.6MB. Max. memory is 16.1GB. * TraceAbstraction took 5205.70ms. Allocated memory was 81.8MB in the beginning and 119.5MB in the end (delta: 37.7MB). Free memory was 54.8MB in the beginning and 68.9MB in the end (delta: -14.1MB). Peak memory consumption was 24.2MB. Max. memory is 16.1GB. * Witness Printer took 36.08ms. Allocated memory is still 119.5MB. Free memory was 68.9MB in the beginning and 65.8MB 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: 1.9s, 78 PlacesBefore, 35 PlacesAfterwards, 76 TransitionsBefore, 32 TransitionsAfterwards, 1020 CoEnabledTransitionPairs, 5 FixpointIterations, 25 TrivialSequentialCompositions, 53 ConcurrentSequentialCompositions, 2 TrivialYvCompositions, 0 ConcurrentYvCompositions, 1 ChoiceCompositions, 81 TotalNumberOfCompositions, 2944 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1394, independent: 1222, independent conditional: 0, independent unconditional: 1222, dependent: 172, dependent conditional: 0, dependent unconditional: 172, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 594, independent: 559, independent conditional: 0, independent unconditional: 559, dependent: 35, dependent conditional: 0, dependent unconditional: 35, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1394, independent: 663, independent conditional: 0, independent unconditional: 663, dependent: 137, dependent conditional: 0, dependent unconditional: 137, unknown: 594, unknown conditional: 0, unknown unconditional: 594] , Statistics on independence cache: Total cache size (in pairs): 58, Positive cache size: 40, Positive conditional cache size: 0, Positive unconditional cache size: 40, Negative cache size: 18, Negative conditional cache size: 0, Negative unconditional cache size: 18, 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: 687]: 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, 93 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: 5.1s, OverallIterations: 8, TraceHistogramMax: 10, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.9s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 457 SdHoareTripleChecker+Valid, 0.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 280 mSDsluCounter, 12 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 72 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 716 IncrementalHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 72 mSolverCounterUnsat, 12 mSDtfsCounter, 716 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=161occurred in iteration=5, InterpolantAutomatonStates: 38, 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: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 108 NumberOfCodeBlocks, 104 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 108 ConstructedInterpolants, 0 QuantifiedInterpolants, 591 SizeOfPredicates, 2 NumberOfNonLiveVariables, 244 ConjunctsInSsa, 18 ConjunctsInUnsatCore, 13 InterpolantComputations, 6 PerfectInterpolantSequences, 175/218 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! [2023-08-30 03:44:36,435 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